aerodrome nikola tesla beograd …...the aerodrome “nikola tesla” beograd is the largest...

AERODROME NIKOLA TESLA

BEOGRAD CLIMATOLOGY

LYBE

Republic Hydrometeorological Service of Serbia

Beograd, 2014

AERODROME CLIMATOLOGY LYBE L

RHMSS – www.hidmet.gov.rs 1

AERODROME NIKOLA TESLA

BEOGRAD CLIMATOLOGY

Authors: Dragan Djukic Aleksandar Pesic Miroslava Mihajlovic Katarina Stefanovic Slavko Petkovic Suncica Mijatovic Zarana Kaurin Mirjana Milenkovic Reublic Hydrometeorological Service

Departement of National Center for Climate Changes

Division for Climate Change Assessment and Applied Meteorology

Beograd, 2014.

http://www.hidmet.gov.rs/



TABLE OF CONTENT

INTRODUCTION ................................................................................................................ 3

1 AERODROME GENERAL INFORMATION ...................................................................... 5

1.1 Geographic location ............................................................................................... 5

1.2 The location of the meteorological station at aerodrome “Nikola Tesla” Beograd ... 6

2 BASIC CLIMATOLOGICAL CHARACTERISTICS OF THE AERODROME .............................. 7

2.1 Air temperature ..................................................................................................... 8

2.2 Humidity .............................................................................................................. 22

2.2.1 Relative humidity ...................................................................................................... 22

2.2.2 Difference between dew point temperature (Td) and air temperature (T) ............. 23

2.3 Air pressure.......................................................................................................... 31

2.4 Visibility and ceiling.............................................................................................. 33

2.4.1 Visibility ..................................................................................................................... 33

2.4.2 Ceiling and vertical visibility ...................................................................................... 54

2.4.3 Runway visual range and visibility in relation to the ceiling ..................................... 73

2.5 Wind .................................................................................................................... 98

2.6 Weather phenomena ......................................................................................... 135

3 LIST OF FIGURES .................................................................................................... 140

4 LIST OF TABLES ...................................................................................................... 141




Introduction

Climatography of the “Nikola Tesla” Belgrade airport is produced on the basis of the meteorological data included in the METAR reports, for the 8-year period (2005-2012), measured and observed on the aeronautical meteorological station at the airport. METAR is a coded meteorological report for the aviation which is issued every half an hour at the airports in Serbia. Out of possible 140256 METAR reports for the observed period, 138549 were available with 1707 reports missing which is 1.22% of data. The overview of the airport’s meteorological features is based on the data processing and analysis of the following parameters: - Air temperature; - Sea-level pressure - Air humidity - Cloudiness - Visibility - Lower cloud-base height - Wind; - Characteristic atmospheric events Hyperlinks in the titles and subtitles in the content, as well as in figures and charts in the lists, link automatically to the desired page of the document. Prior to processing, the basic technical and logical data control has been conducted. All timelines, that is, periods contained in the METAR reports are given according to the Coordinated Universal Time – UTC. Measurement units which are used correspond with the measurement units utilized in the METAR report, according to the ICAO Annex 3. Climatography is produced in the Division for applied climatology of the Republic Hydrometeorological Service of Serbia. The content of the climatography is defined in the agreement with the Civil Aviation Directorate of the Republic of Serbia according to the Rulebook on the observed meteorological data for the production of aeronautical climate data of the airport from 04.05.2012, recommendation of the Technical Regulations of WMO (Technical Regulations – Basic Documents No. 2: Volume II - Meteorological Service for International Air Navigation, WMO – No. 49) and standards and recommendations of the International Civil Aviation Organizaion (ICAO Annex 3: Meteorological Service for International Air Navigation) as well as from the end-users requests.




Most of charts in the climatography are colored with the color gradient, spanning from light to dark red, where light indicates lower and dark indicates higher values of the specific parameter. Cases when the certain event hasn’t occurred and when the relative frequency is 0 are represented with white color in the charts. Certain charts depict mean and mean annual values, and are colored from light to dark yellow, according to the above rule. Colors depict the relationship between values in the set of charts for one parameter and one color in the specific chart set has always the same numerical value. The color selection doesn’t indicate favorable or unfavorable parameter values for the aviation. Additionally, given the changes that have been made regarding the order of the month and period in certain charts, some of the charts begin and end with June, whereas periods start and end with 1300 UTC in order to provide better overview of the observed parameters distribution. The relative frequency is calculated as the quotient of the occurrence number of the observed parameter and the total number of the available data.

Figure 1. An example of the chart showing relative frequency of the observed parameter

MONTH/ TIME (UTC)

VI VII VIII IX

1300 1.7 0.0 0.8 2.5

1330 2.1 0.8 1.6 2.1

1400 1.7 0.8 0.8 1.3

1430 1.3 0.8 0.8 1.7

1500 2.1 0.4 0.8 2.1

The average number of days when the observed event occurred is calculated as the quotient of the occurrence number of the observed event and the year number.

Figure 2. An example of the chart showing average number of days of the event occurrence

Average value of the observed parameter is calculated as the sum quotient of all parameter

values and the total number of data.

Figure 3. An example of the chart showing average value of the observed parameter

Phenomena/

Month

FG/FZFG/

MIFG/

VCFG

FZFG DZ/FZDZ

I 10.5 5.8 1.5

II 7.1 3.8 0.6

III 1.6 0.6 0.6

Month/

Time (UTC)VI VII VIII IX

1300 1014.1 1013.9 1014.1 1016.8

1330 1014.0 1013.8 1014.0 1016.7

1400 1013.9 1013.6 1013.8 1016.5




1 AERODROME GENERAL INFORMATION

1.1 Geographic location

The aerodrome “Nikola Tesla” Beograd is the largest international airport of the Republic of Serbia. It is situated on the Surcin Plateau, in the area belonging to the Syrmian lowland, on one of the most southernmost points of the Pannonia Plain. The aerodrome is situated 13 km west (275о) of downtown Belgrade. The aerodrome’s geographic latitude and longitude are 44о 49' 10'' N and 20о 18' 25'' E respectively, with the elevation of 102 m that is equal to 336 ft. The mountain closest to the aerodrome is Avala, situated 23 km south-east of the airport, with the highest peak standing at 511 m. In the same direction at greater distance stretches the Sumadija Mountain Range, with the mountains of Kosmaj (distance 47 km, highest peak 626 m), Bukulja (distance 63 km, highest peak 696 m), Vencac (distance 77 km, highest peak 659 m) and Rudnik (highest peak 1132 m). The closest mountain north-west of the aerodrome is Fruska Gora with the highest peak standing at 539 m. On a somewhat greater distance west and south-west from the aerodrome spreads the Macva Mountain Range, with Cer being the mountain closest to the aerodrome (highest point of 689 m). In the southern direction lies the Valjevo Mountain Range, with the mountains of Gucevo (highest peak 779 m), Jagodnja (highest peak 940 m), Povlen (highest peak 1347 m) and Maljen (highest peak 1103 m). From the northern, northeastern and eastern side, the airport is open to the Pannonia Plain.

Figure 4. Runway in Belgrade




1.2 The location of the meteorological station at aerodrome “Nikola Tesla”

Beograd

The aerodrome “Nikola Tesla” Beograd operates as a single-runway airport, with runway of 3400 m in length, stretching in the SE-NW direction (122о/302о). Both runway thresholds are equipped with the instrument landing system (ILS). A taxiway stretches 3000 m parallel to the runway, with ends connecting in an U-shape. The distance between the runway and taxiway is 250 m. The meteorological station is located 150 m of the runway threshold 12, in the vicinity of the touchdown zone, between the taxiway and runway, at 195 m of the right edge of the runway. The coordinates for the station are 44о 49’ N and 20о 18’ E, with the elevation of 96.5 m. ICAO location indicator is LYBE, and the Index number of the synoptic station is 13272. The station undertakes aviation and synoptic measurements.




2 BASIC CLIMATOLOGICAL CHARACTERISTICS OF THE AERODROME

The aerodrome is located at the moderate latitudes of the northern hemisphere (app. 45 N) on the flatland in the southern edge of the Pannonian Plain, 13 km west of downtown Belgrade. Based on nearly 50 years of meteorological measurements conducted at the aerodrome and more than 120 years of measurements at the Meteorological Observatory Belgrade, it can be concluded that the aerodrome and surrounding area have moderate continental climate that marks the transition between the climate of the Mediterranean and Adriatic and the climate of the Carpathians. The climate of a certain location primarily depends on the ongoing macro processes in the atmosphere and local conditions. The local impact is marginal during synoptic processes that cause strong wind, increased cloudiness and showery precipitation as well as during strongly pronounced incursions of the convective weather type. By contrast, local factors come to the fore during the weather type related to anticyclone. Cold and wet air frequently penetrates from the west and northwest. Northerly advections across the Pannonia Plain cause considerable temperature drops while cold air incursions from the northeast and the Carpathian region produce cold, windy and predominantly dry weather in winter. Due to the strengthening of the southwesterly upper air circulation above the Balkans, a so called fen effect is visible particularly in spring and autumn, leading to significant temperature increase. Alternation of the cold and warm periods takes place regularly in all seasons. Heavy rainfall, as well as local summer storms are brought by cyclones emanating from the western Mediterranean transferring northeastward across Austria and eastern Europe or eastward along the valleys of the Sava and Danube rivers. Incursions of wet and cold air occur at the beginning of May. Isolated showers and thunderstorms occur frequently in May and June, shorter or longer dry spells are characteristic for the end of summer, while the period at the end of September and beginning of October is characterized by warm and dry weather known as Indian summer.




2.1 Air temperature

Temperature regime of the area where the aerodrome is situated reflects all the characteristics of the continental climate. Table 1 shows mean monthly and mean annual air temperature, along with the extreme air temperature and the mean number of days with the characteristic values of the air temperature for the period from 2005 to 2012.

Annual mean air temperature for the specified period is 12.6С. Mean monthly air

temperature is in a range from 1.1С in January to 23.7С in July. The recorded absolute

maximum air temperature in all months exceeds 17С. In the period from May to October

the absolute maximum exceeds 33С. July and August have the greatest number of days

with the maximum daily air temperature above 30С (tropical days), on average 15.1 days in

July and 13.6 days in August. Air temperature of 43.0C measured on July 24, 2007 is the

absolute high. Absolute minimum of -24.0С was measured on February 9, 2012. January is characterized by the greatest number of frost days, 17.1 days on average. Table 1. Average monthly and annual air temperature, air temperature extremes, and average number of days

within specified values of air temperature

Month I II III IV V VI VII VIII IX X XI XII Year

Average monthly and

yearly air temperature1.1 1.4 7.5 13.3 17.7 21.3 23.7 22.9 18.6 12.5 7.4 2.7 12.6

Average maximum air

temperature4.4 5.0 12.2 18.7 23.1 26.6 29.3 28.8 24.1 17.8 12.0 5.6 17.3

Average minimum air

temperature-2.1 -2.2 2.6 7.5 11.9 15.2 17.1 16.5 12.8 7.6 3.1 -0.3 7.5

Absolute maximum of air

temperature17.0 24.0 25.0 29.0 35.0 36.0 43.0 40.0 37.0 33.0 25.0 19.0 43.0

Absolute minimum of air

temperature-18.0 -24.0 -13.0 -2.0 1.0 6.0 11.0 8.0 4.0 -2.0 -6.0 -22.0 -24.0

Average number of days

with air temperature

<0 °C (frost day)

17.1 16.5 7.4 0.1 0 0 0 0 0 1.0 6.3 14.6 63.0



≥30 °C (tropical day)

0 0 0 0 2.6 10.1 15.1 13.6 4.9 0.3 0 0 46.6



≥35 °C

0 0 0 0 0.1 1.1 5.1 3.5 0.5 0 0 0 10.4

Table 2 shows the average air temperature per months and for year. The daily course of the air temperature shows that the minimum air temperature is recorded prior to sunrise, whereas the daily maximum is recorded between 1230 and 1500 UTC. Tables 3 to 14 show the relative frequency of air temperature (%) in intervals of 5°С per months.




Table 2. Average air temperature per month and year

Month/

Time (UTC)I II III IV V VI VII VIII IX X XI XII Year

0000 0.1 0.1 5.2 10.4 14.1 17.6 19.6 19.1 15.6 10.2 5.7 1.9 10.0

0030 0.0 0.0 5.0 10.1 13.8 17.2 19.3 18.7 15.2 10.0 5.6 1.9 9.9

0100 -0.1 -0.2 4.9 9.9 13.6 16.9 19.0 18.5 15.0 9.9 5.5 1.9 9.6

0130 -0.1 -0.2 4.7 9.5 13.4 16.8 18.6 18.2 14.8 9.7 5.4 1.7 9.5

0200 -0.2 -0.3 4.5 9.3 13.2 16.5 18.5 18.0 14.5 9.5 5.2 1.6 9.3

0230 -0.2 -0.4 4.4 9.2 13.0 16.3 18.3 17.7 14.4 9.4 5.1 1.6 9.1

0300 -0.4 -0.5 4.2 9.0 12.9 16.2 18.1 17.6 14.2 9.3 4.9 1.6 9.0

0330 -0.5 -0.4 4.2 9.0 12.8 16.1 18.0 17.3 14.0 9.2 4.9 1.6 8.9

0400 -0.6 -0.6 4.1 8.8 12.9 16.6 18.3 17.4 13.9 9.1 4.8 1.6 8.9

0430 -0.5 -0.7 4.0 8.9 13.5 17.4 19.1 17.6 13.8 9.0 4.7 1.5 9.1

0500 -0.6 -0.7 3.9 9.2 14.3 18.2 19.9 18.3 14.1 9.0 4.7 1.5 9.4

0530 -0.6 -0.7 4.0 9.8 15.0 19.0 20.8 19.2 14.7 9.0 4.6 1.6 9.8

0600 -0.6 -0.8 4.6 10.5 15.8 19.7 21.7 20.0 15.6 9.5 4.7 1.6 10.3

0630 -0.5 -0.7 5.3 11.6 16.5 20.5 22.6 21.0 16.6 10.2 5.0 1.5 10.9

0700 -0.4 -0.2 6.0 12.4 17.3 21.3 23.4 22.0 17.5 11.0 5.6 1.7 11.5

0730 0.0 0.2 6.7 13.2 18.1 21.9 24.2 22.9 18.4 11.8 6.3 2.0 12.2

0800 0.5 0.8 7.4 13.8 18.8 22.5 24.8 23.9 19.2 12.6 7.0 2.3 12.9

0830 1.0 1.2 8.2 14.6 19.4 23.1 25.5 24.5 20.0 13.3 7.7 2.8 13.5

0900 1.4 1.6 8.9 15.3 20.0 23.6 26.1 25.3 20.7 14.1 8.3 3.1 14.1

0930 2.0 2.3 9.4 15.9 20.4 24.1 26.6 25.6 21.3 14.7 9.0 3.5 14.6

1000 2.3 2.7 9.8 16.2 20.8 24.5 27.1 26.3 22.0 15.4 9.6 3.9 15.1

1030 2.7 3.2 10.4 16.6 21.1 24.8 27.4 26.7 22.4 15.9 10.2 4.2 15.6

1100 3.0 3.5 10.8 17.0 21.4 25.2 27.7 27.1 22.8 16.4 10.6 4.4 15.9

1130 3.4 3.7 11.1 17.2 21.7 25.4 28.0 27.4 23.1 16.7 11.0 4.6 16.2

1200 3.5 3.8 11.1 17.5 21.7 25.5 28.2 27.7 23.3 17.0 11.3 4.8 16.3

1230 3.7 4.2 11.4 17.7 21.9 25.7 28.4 27.9 23.5 17.1 11.4 4.8 16.6

1300 3.7 4.3 11.4 17.8 22.1 25.7 28.5 28.0 23.6 17.2 11.5 4.9 16.6

1330 3.7 4.4 11.4 17.8 22.1 25.7 28.5 28.1 23.6 17.1 11.3 4.7 16.6

1400 3.7 4.3 11.4 17.9 22.1 25.8 28.7 28.1 23.7 17.0 11.1 4.6 16.6

1430 3.5 4.3 11.4 17.7 22.1 25.6 28.7 28.1 23.5 16.8 10.7 4.3 16.5

1500 3.0 3.9 11.2 17.5 22.0 25.6 28.5 28.0 23.3 16.4 10.0 3.9 16.2

1530 2.5 3.8 11.0 17.4 21.9 25.3 28.4 27.8 22.9 15.7 9.3 3.5 15.9

1600 2.2 3.2 10.4 17.0 21.4 25.1 28.1 27.5 22.4 15.0 8.9 3.3 15.4

1630 1.9 2.7 9.8 16.6 20.9 24.5 27.6 26.9 21.5 14.2 8.5 3.1 14.9

1700 1.6 2.3 9.1 15.8 20.4 24.2 27.1 26.2 20.5 13.7 8.3 2.9 14.4

1730 1.5 2.1 8.6 14.9 19.6 23.5 26.3 25.3 19.8 13.2 8.0 2.8 13.9

1800 1.3 1.8 8.2 14.3 18.8 22.7 25.4 24.4 19.2 12.9 7.6 2.8 13.4

1830 1.1 1.8 7.6 13.8 18.1 21.8 24.4 23.6 18.7 12.5 7.4 2.7 12.9

1900 1.1 1.6 7.5 13.4 17.6 21.2 23.7 23.0 18.4 12.2 7.2 2.6 12.5

1930 1.0 1.5 7.2 13.0 17.1 20.7 23.2 22.4 18.0 12.0 7.2 2.6 12.2

2000 0.9 1.2 7.0 12.6 16.7 20.2 22.7 22.0 17.7 11.7 7.0 2.5 12.0

2030 0.8 1.1 6.6 12.4 16.3 19.8 22.1 21.5 17.3 11.4 6.8 2.4 11.6

2100 0.7 1.0 6.5 11.9 15.9 19.5 21.7 21.0 17.1 11.2 6.7 2.3 11.3

2130 0.5 0.9 6.4 11.6 15.6 19.2 21.3 20.6 16.8 10.9 6.4 2.2 11.1

2200 0.5 0.8 6.1 11.4 15.3 18.8 20.9 20.4 16.5 10.7 6.2 2.0 10.9

2230 0.4 0.6 6.0 11.2 15.0 18.5 20.7 20.0 16.2 10.6 6.1 2.0 10.7

2300 0.4 0.5 5.7 10.9 14.7 18.3 20.3 19.6 15.9 10.4 6.1 1.8 10.5

2330 0.2 0.3 5.6 10.7 14.4 18.1 20.0 19.3 15.7 10.2 5.8 1.9 10.2

MEAN 1.1 1.4 7.5 13.3 17.7 21.3 23.7 22.9 18.6 12.5 7.4 2.7 12.6




Table 3. Frequency of surface temperature in specified ranges of 5°C at the specified times – January (ICAO Model E)

MONTH: I

-25 - - 20 -20 - -15 -15 - -10 -10 - -5 -5 - 0 0 - 5 5 - 10 10 - 15 15 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45

0000 0.0 0.4 1.6 13.5 27.9 39.8 14.3 2.5 0.0 0.0 0.0 0.0 0.0 0.0

0030 0.0 0.4 2.1 13.3 29.5 40.2 12.4 2.1 0.0 0.0 0.0 0.0 0.0 0.0

0100 0.0 0.4 2.0 12.6 30.4 40.5 12.1 2.0 0.0 0.0 0.0 0.0 0.0 0.0

0130 0.0 0.0 2.8 13.0 31.3 37.0 13.8 2.0 0.0 0.0 0.0 0.0 0.0 0.0

0200 0.0 0.0 2.9 12.2 31.4 39.2 12.7 1.6 0.0 0.0 0.0 0.0 0.0 0.0

0230 0.0 0.4 2.5 12.3 30.7 38.5 13.9 1.6 0.0 0.0 0.0 0.0 0.0 0.0

0300 0.0 0.4 3.2 12.6 30.0 38.5 13.8 1.6 0.0 0.0 0.0 0.0 0.0 0.0

0330 0.0 0.4 4.1 11.8 31.0 36.7 14.7 1.2 0.0 0.0 0.0 0.0 0.0 0.0

0400 0.0 0.0 4.5 11.0 32.2 38.8 11.8 1.6 0.0 0.0 0.0 0.0 0.0 0.0

0430 0.0 0.0 4.5 10.6 32.5 39.8 10.6 2.0 0.0 0.0 0.0 0.0 0.0 0.0

0500 0.0 0.0 4.0 11.7 33.2 39.3 10.1 1.6 0.0 0.0 0.0 0.0 0.0 0.0

0530 0.0 0.8 2.4 12.2 33.7 39.0 10.6 1.2 0.0 0.0 0.0 0.0 0.0 0.0

0600 0.0 0.8 2.9 11.8 33.5 39.6 10.2 1.2 0.0 0.0 0.0 0.0 0.0 0.0

0630 0.0 0.4 2.9 11.3 34.7 37.2 12.1 1.3 0.0 0.0 0.0 0.0 0.0 0.0

0700 0.0 0.4 2.4 11.4 32.2 39.6 13.1 0.8 0.0 0.0 0.0 0.0 0.0 0.0

0730 0.0 0.0 1.6 12.8 30.9 39.1 15.2 0.4 0.0 0.0 0.0 0.0 0.0 0.0

0800 0.0 0.0 1.6 11.8 30.1 36.6 17.5 2.4 0.0 0.0 0.0 0.0 0.0 0.0

0830 0.0 0.0 1.2 9.5 30.5 35.4 19.8 3.7 0.0 0.0 0.0 0.0 0.0 0.0

0900 0.0 0.0 1.2 8.6 29.6 33.3 21.4 5.8 0.0 0.0 0.0 0.0 0.0 0.0

0930 0.0 0.0 0.8 8.2 25.4 34.8 22.1 8.6 0.0 0.0 0.0 0.0 0.0 0.0

1000 0.0 0.0 0.8 6.6 25.8 33.2 23.4 10.2 0.0 0.0 0.0 0.0 0.0 0.0

1030 0.0 0.0 0.4 6.6 24.1 30.7 25.3 12.9 0.0 0.0 0.0 0.0 0.0 0.0

1100 0.0 0.0 0.4 5.3 22.6 32.9 22.6 15.6 0.4 0.0 0.0 0.0 0.0 0.0

1130 0.0 0.0 0.0 5.0 21.5 32.2 24.0 16.9 0.4 0.0 0.0 0.0 0.0 0.0

1200 0.0 0.0 0.0 4.1 23.4 30.3 23.8 16.8 1.6 0.0 0.0 0.0 0.0 0.0

1230 0.0 0.0 0.0 3.3 22.9 32.5 21.2 17.9 2.1 0.0 0.0 0.0 0.0 0.0

1300 0.0 0.0 0.0 4.1 21.7 32.0 22.5 17.6 2.0 0.0 0.0 0.0 0.0 0.0

1330 0.0 0.0 0.0 3.7 21.3 33.2 20.9 18.4 2.5 0.0 0.0 0.0 0.0 0.0

1400 0.0 0.0 0.0 3.3 23.0 32.8 19.7 19.7 1.6 0.0 0.0 0.0 0.0 0.0

1430 0.0 0.0 0.0 4.6 22.4 31.2 21.9 18.1 1.7 0.0 0.0 0.0 0.0 0.0

1500 0.0 0.0 0.0 5.8 22.6 32.5 24.3 14.4 0.4 0.0 0.0 0.0 0.0 0.0

1530 0.0 0.0 0.0 7.5 22.6 33.1 26.8 10.0 0.0 0.0 0.0 0.0 0.0 0.0

1600 0.0 0.0 0.0 8.2 25.1 32.5 25.1 9.1 0.0 0.0 0.0 0.0 0.0 0.0

1630 0.0 0.0 0.0 8.7 25.7 33.2 25.3 7.1 0.0 0.0 0.0 0.0 0.0 0.0

1700 0.0 0.0 0.4 9.5 26.1 33.2 23.2 7.5 0.0 0.0 0.0 0.0 0.0 0.0

1730 0.0 0.0 0.4 11.4 24.4 35.0 22.8 6.1 0.0 0.0 0.0 0.0 0.0 0.0

1800 0.0 0.0 0.4 12.3 25.9 35.0 21.4 4.9 0.0 0.0 0.0 0.0 0.0 0.0

1830 0.0 0.0 0.4 12.5 25.8 35.0 22.1 4.2 0.0 0.0 0.0 0.0 0.0 0.0

1900 0.0 0.0 1.2 12.2 26.4 32.5 23.6 4.1 0.0 0.0 0.0 0.0 0.0 0.0

1930 0.0 0.0 1.2 12.1 26.6 35.9 21.0 3.2 0.0 0.0 0.0 0.0 0.0 0.0

2000 0.0 0.0 1.6 11.9 27.2 33.7 21.8 3.7 0.0 0.0 0.0 0.0 0.0 0.0

2030 0.0 0.0 0.8 13.6 27.6 33.3 22.6 2.1 0.0 0.0 0.0 0.0 0.0 0.0

2100 0.0 0.0 1.7 12.4 26.9 34.7 22.3 2.1 0.0 0.0 0.0 0.0 0.0 0.0

2130 0.0 0.0 2.1 11.6 28.1 36.0 20.7 1.7 0.0 0.0 0.0 0.0 0.0 0.0

2200 0.0 0.0 2.0 11.7 28.3 36.8 18.6 2.4 0.0 0.0 0.0 0.0 0.0 0.0

2230 0.0 0.8 1.6 11.9 28.3 35.2 19.7 2.5 0.0 0.0 0.0 0.0 0.0 0.0

2300 0.0 0.0 1.6 13.0 29.6 34.4 19.0 2.4 0.0 0.0 0.0 0.0 0.0 0.0

2330 0.0 0.4 1.6 13.4 28.9 37.0 16.3 2.4 0.0 0.0 0.0 0.0 0.0 0.0

MEAN 0.0 0.1 1.5 10.0 27.6 35.5 18.8 6.2 0.3 0.0 0.0 0.0 0.0 0.0

MODEL E PERIOD OF RECORD: 2005 - 2012

TEMPERATURE

AERODROME: LYBE

LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25" ETOTAL NUMBER OF OBSERVATIONS: 138528

REMARKS

ELEVATION ABOVE MSL: 336 ft

FREQUENCIES (%) OF SURFACE TEMPERATURE (SCREEN) IN SPECIFIED RANGES OF 5°C AT THE SPECIFIED TIMES

TIME

(UTC)

The range 5 - 10 comprises the values 5.0 to 9.9 inclusive; Cases when a certain phenomenon is not occurred and

frequency is 0 are shaded white




Table 4. Frequency of surface temperature in specified ranges of 5°C at the specified times – February (ICAO Model E)

MONTH: II

-25 - - 20 -20 - -15 -15 - -10 -10 - -5 -5 - 0 0 - 5 5 - 10 10 - 15 15 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45

0000 0.0 1.4 2.8 10.6 30.7 33.5 17.0 4.1 0.0 0.0 0.0 0.0 0.0 0.0

0030 0.0 2.3 2.3 8.8 33.2 30.9 20.3 2.3 0.0 0.0 0.0 0.0 0.0 0.0

0100 0.0 1.8 3.1 9.9 33.2 31.8 18.4 1.8 0.0 0.0 0.0 0.0 0.0 0.0

0130 0.0 1.8 3.1 9.9 32.7 32.7 17.9 1.8 0.0 0.0 0.0 0.0 0.0 0.0

0200 0.0 1.8 3.1 9.9 34.1 32.7 16.6 1.8 0.0 0.0 0.0 0.0 0.0 0.0

0230 0.0 1.8 3.2 10.4 35.6 31.1 15.8 2.3 0.0 0.0 0.0 0.0 0.0 0.0

0300 0.0 1.8 4.0 9.4 35.7 31.2 16.1 1.8 0.0 0.0 0.0 0.0 0.0 0.0

0330 0.0 1.8 4.1 8.7 36.1 31.1 16.4 1.8 0.0 0.0 0.0 0.0 0.0 0.0

0400 0.9 0.9 4.9 9.8 33.5 32.1 16.1 1.8 0.0 0.0 0.0 0.0 0.0 0.0

0430 0.4 1.8 4.4 8.9 36.4 29.8 16.0 2.2 0.0 0.0 0.0 0.0 0.0 0.0

0500 0.4 1.8 4.9 8.1 35.9 30.5 17.5 0.9 0.0 0.0 0.0 0.0 0.0 0.0

0530 0.9 0.9 4.9 10.7 33.9 30.8 17.0 0.9 0.0 0.0 0.0 0.0 0.0 0.0

0600 0.9 1.4 4.3 11.4 32.2 32.7 16.1 0.9 0.0 0.0 0.0 0.0 0.0 0.0

0630 1.4 0.9 4.1 11.3 32.6 31.2 17.6 0.9 0.0 0.0 0.0 0.0 0.0 0.0

0700 1.4 0.5 3.2 10.1 31.2 33.5 17.9 2.3 0.0 0.0 0.0 0.0 0.0 0.0

0730 0.0 1.8 3.2 9.5 30.8 32.1 15.8 6.8 0.0 0.0 0.0 0.0 0.0 0.0

0800 0.0 1.3 2.7 9.0 28.3 32.7 17.5 8.5 0.0 0.0 0.0 0.0 0.0 0.0

0830 0.0 1.4 2.7 8.7 26.5 32.9 16.4 11.4 0.0 0.0 0.0 0.0 0.0 0.0

0900 0.0 0.9 2.8 7.8 26.7 31.3 18.9 10.6 0.9 0.0 0.0 0.0 0.0 0.0

0930 0.0 0.4 3.1 7.2 23.3 33.6 17.5 12.1 2.7 0.0 0.0 0.0 0.0 0.0

1000 0.0 0.5 3.2 6.8 23.0 31.1 18.9 12.6 3.6 0.5 0.0 0.0 0.0 0.0

1030 0.0 0.5 2.3 5.4 22.5 30.2 21.6 10.4 6.8 0.5 0.0 0.0 0.0 0.0

1100 0.0 0.0 2.7 6.3 22.9 26.9 21.5 12.1 7.2 0.4 0.0 0.0 0.0 0.0

1130 0.0 0.0 2.2 6.7 20.6 27.8 23.3 12.1 6.7 0.4 0.0 0.0 0.0 0.0

1200 0.0 0.0 1.8 7.3 19.1 26.8 25.0 10.9 8.2 0.9 0.0 0.0 0.0 0.0

1230 0.0 0.0 1.4 7.3 19.3 24.3 26.6 11.9 8.3 0.9 0.0 0.0 0.0 0.0

1300 0.0 0.0 0.5 8.6 17.1 26.6 25.2 13.1 8.1 0.9 0.0 0.0 0.0 0.0

1330 0.0 0.0 0.9 7.7 16.8 27.3 25.0 12.7 8.6 0.9 0.0 0.0 0.0 0.0

1400 0.0 0.0 0.9 8.5 16.6 26.5 25.6 12.6 8.5 0.9 0.0 0.0 0.0 0.0

1430 0.0 0.0 0.9 8.2 18.3 25.6 24.2 14.6 7.3 0.9 0.0 0.0 0.0 0.0

1500 0.0 0.0 1.8 7.6 17.9 28.3 23.3 13.9 6.3 0.9 0.0 0.0 0.0 0.0

1530 0.0 0.0 1.8 6.9 18.9 28.6 23.5 14.7 4.6 0.9 0.0 0.0 0.0 0.0

1600 0.0 0.0 2.7 7.2 20.7 30.6 22.1 13.5 3.2 0.0 0.0 0.0 0.0 0.0

1630 0.0 0.0 3.6 7.2 21.2 30.6 21.6 14.0 1.8 0.0 0.0 0.0 0.0 0.0

1700 0.0 0.0 4.0 6.7 22.9 32.3 19.3 13.5 1.3 0.0 0.0 0.0 0.0 0.0

1730 0.0 0.0 4.1 5.9 26.1 31.5 19.8 11.3 1.4 0.0 0.0 0.0 0.0 0.0

1800 0.0 0.0 5.2 6.2 25.2 32.9 19.0 10.5 1.0 0.0 0.0 0.0 0.0 0.0

1830 0.0 0.0 3.1 8.0 27.2 29.5 20.5 11.6 0.0 0.0 0.0 0.0 0.0 0.0

1900 0.0 0.0 4.5 7.6 27.4 29.6 20.2 10.8 0.0 0.0 0.0 0.0 0.0 0.0

1930 0.0 0.5 4.1 7.3 28.6 29.1 19.5 10.9 0.0 0.0 0.0 0.0 0.0 0.0

2000 0.0 0.9 4.1 8.3 28.0 28.4 19.7 10.6 0.0 0.0 0.0 0.0 0.0 0.0

2030 0.0 0.9 3.6 9.1 28.2 29.1 17.7 11.4 0.0 0.0 0.0 0.0 0.0 0.0

2100 0.0 0.9 3.2 8.7 28.3 31.5 17.4 10.0 0.0 0.0 0.0 0.0 0.0 0.0

2130 0.0 0.9 2.7 9.1 29.7 30.6 17.8 9.1 0.0 0.0 0.0 0.0 0.0 0.0

2200 0.0 0.5 2.7 9.1 30.5 30.5 20.0 6.8 0.0 0.0 0.0 0.0 0.0 0.0

2230 0.0 1.4 2.3 8.6 30.5 30.9 19.1 7.3 0.0 0.0 0.0 0.0 0.0 0.0

2300 0.0 1.4 1.8 9.1 30.9 32.3 19.5 5.0 0.0 0.0 0.0 0.0 0.0 0.0

2330 0.0 1.4 2.7 9.0 29.4 33.5 19.5 4.5 0.0 0.0 0.0 0.0 0.0 0.0

MEAN 0.1 0.8 3.0 8.4 27.3 30.4 19.6 8.1 2.0 0.2 0.0 0.0 0.0 0.0

AERODROME: LYBE PERIOD OF RECORD: 2005 - 2012MODEL E

REMARKS

TOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25" E ELEVATION ABOVE MSL: 336 ft


TEMPERATURETIME

(UTC)






Table 5. Frequencies of surface temperature in specified ranges of 5°C at the specified times – March (ICAO Model E)

MONTH: III

-25 - - 20 -20 - -15 -15 - -10 -10 - -5 -5 - 0 0 - 5 5 - 10 10 - 15 15 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45

0000 0.0 0.0 0.4 1.2 15.4 25.3 36.5 19.1 2.1 0.0 0.0 0.0 0.0 0.0

0030 0.0 0.0 0.4 1.7 15.5 26.9 35.7 18.1 1.7 0.0 0.0 0.0 0.0 0.0

0100 0.0 0.0 0.8 1.3 15.9 26.4 36.4 18.0 1.3 0.0 0.0 0.0 0.0 0.0

0130 0.0 0.0 0.8 1.2 17.0 26.1 37.8 16.2 0.8 0.0 0.0 0.0 0.0 0.0

0200 0.0 0.0 0.8 1.7 17.4 26.7 37.3 15.7 0.4 0.0 0.0 0.0 0.0 0.0

0230 0.0 0.0 0.8 1.2 19.5 29.5 33.6 14.1 1.2 0.0 0.0 0.0 0.0 0.0

0300 0.0 0.0 0.8 1.2 19.3 30.0 34.6 13.2 0.8 0.0 0.0 0.0 0.0 0.0

0330 0.0 0.0 0.4 1.7 18.7 30.7 34.4 12.4 1.7 0.0 0.0 0.0 0.0 0.0

0400 0.0 0.0 0.4 1.6 20.0 30.2 34.3 11.8 1.6 0.0 0.0 0.0 0.0 0.0

0430 0.0 0.0 0.4 2.8 20.3 28.5 34.1 12.6 1.2 0.0 0.0 0.0 0.0 0.0

0500 0.0 0.0 0.4 3.3 20.5 28.7 34.8 11.1 1.2 0.0 0.0 0.0 0.0 0.0

0530 0.0 0.0 0.4 4.0 19.4 28.7 35.2 10.9 1.2 0.0 0.0 0.0 0.0 0.0

0600 0.0 0.0 0.4 3.7 16.0 27.5 37.7 13.5 1.2 0.0 0.0 0.0 0.0 0.0

0630 0.0 0.0 0.4 1.3 14.3 27.3 36.1 17.6 2.9 0.0 0.0 0.0 0.0 0.0

0700 0.0 0.0 0.0 1.2 12.3 26.7 29.2 26.3 4.1 0.0 0.0 0.0 0.0 0.0

0730 0.0 0.0 0.4 0.8 11.9 21.7 29.5 28.3 7.4 0.0 0.0 0.0 0.0 0.0

0800 0.0 0.0 0.0 1.2 9.5 18.5 30.9 27.6 12.3 0.0 0.0 0.0 0.0 0.0

0830 0.0 0.0 0.0 0.4 9.5 16.0 29.2 30.0 14.0 0.8 0.0 0.0 0.0 0.0

0900 0.0 0.0 0.0 0.4 8.6 14.4 27.2 30.5 17.7 1.2 0.0 0.0 0.0 0.0

0930 0.0 0.0 0.0 0.0 8.6 13.5 25.7 29.4 19.6 3.3 0.0 0.0 0.0 0.0

1000 0.0 0.0 0.0 0.4 8.6 13.2 23.5 29.6 20.6 4.1 0.0 0.0 0.0 0.0

1030 0.0 0.0 0.0 0.4 6.6 11.6 23.7 29.9 21.6 6.2 0.0 0.0 0.0 0.0

1100 0.0 0.0 0.0 0.4 5.4 11.7 23.0 26.8 25.1 7.5 0.0 0.0 0.0 0.0

1130 0.0 0.0 0.0 0.4 5.3 11.5 21.8 27.6 24.7 8.6 0.0 0.0 0.0 0.0

1200 0.0 0.0 0.0 0.0 5.7 12.3 21.3 25.0 25.8 9.8 0.0 0.0 0.0 0.0

1230 0.0 0.0 0.0 0.0 5.0 11.7 21.3 24.3 25.1 12.6 0.0 0.0 0.0 0.0

1300 0.0 0.0 0.0 0.0 5.3 12.2 20.8 24.5 25.7 11.0 0.4 0.0 0.0 0.0

1330 0.0 0.0 0.0 0.0 4.9 13.1 21.7 22.5 26.2 11.5 0.0 0.0 0.0 0.0

1400 0.0 0.0 0.0 0.0 4.9 12.3 20.9 26.6 23.8 11.1 0.4 0.0 0.0 0.0

1430 0.0 0.0 0.0 0.0 4.9 11.8 20.4 27.3 23.7 11.4 0.4 0.0 0.0 0.0

1500 0.0 0.0 0.0 0.0 6.1 11.3 20.6 27.9 23.5 10.5 0.0 0.0 0.0 0.0

1530 0.0 0.0 0.0 0.4 5.0 12.1 21.7 27.5 24.6 8.8 0.0 0.0 0.0 0.0

1600 0.0 0.0 0.0 0.4 5.8 13.2 24.8 27.3 21.9 6.6 0.0 0.0 0.0 0.0

1630 0.0 0.0 0.0 0.4 6.9 13.1 26.9 28.6 19.6 4.5 0.0 0.0 0.0 0.0

1700 0.0 0.0 0.0 0.4 7.4 14.4 28.4 32.9 14.8 1.6 0.0 0.0 0.0 0.0

1730 0.0 0.0 0.0 0.4 8.2 14.3 30.3 32.4 13.9 0.4 0.0 0.0 0.0 0.0

1800 0.0 0.0 0.0 0.8 8.6 15.2 31.1 31.1 12.7 0.4 0.0 0.0 0.0 0.0

1830 0.0 0.0 0.0 0.8 9.9 16.5 32.9 29.2 10.3 0.4 0.0 0.0 0.0 0.0

1900 0.0 0.0 0.0 0.8 10.2 17.9 32.9 27.6 10.6 0.0 0.0 0.0 0.0 0.0

1930 0.0 0.0 0.0 1.2 9.8 19.7 34.0 26.6 8.6 0.0 0.0 0.0 0.0 0.0

2000 0.0 0.0 0.0 0.8 10.7 19.3 35.0 27.2 7.0 0.0 0.0 0.0 0.0 0.0

2030 0.0 0.0 0.0 1.2 11.5 21.7 34.0 25.0 6.6 0.0 0.0 0.0 0.0 0.0

2100 0.0 0.0 0.0 1.6 10.9 21.5 35.6 24.3 6.1 0.0 0.0 0.0 0.0 0.0

2130 0.0 0.0 0.0 1.3 12.2 20.6 36.6 25.6 3.8 0.0 0.0 0.0 0.0 0.0

2200 0.0 0.0 0.0 1.2 13.5 20.9 36.9 24.6 2.9 0.0 0.0 0.0 0.0 0.0

2230 0.0 0.0 0.0 1.2 14.2 21.2 37.5 23.8 2.1 0.0 0.0 0.0 0.0 0.0

2300 0.0 0.0 0.0 1.7 14.6 21.2 38.3 22.1 2.1 0.0 0.0 0.0 0.0 0.0

2330 0.0 0.0 0.0 1.6 14.8 23.0 37.4 21.0 2.1 0.0 0.0 0.0 0.0 0.0

MEAN 0.0 0.0 0.2 1.0 11.4 19.6 30.5 23.4 11.0 2.8 0.0 0.0 0.0 0.0

AERODROME: LYBE PERIOD OF RECORD: 2005 - 2012MODEL E

REMARKS



TEMPERATURETIME

(UTC)






Table 6. Frequencies of surface temperature in specified ranges of 5°C at the specified times – April (ICAO Model E)

MONTH: IV

-25 - - 20 -20 - -15 -15 - -10 -10 - -5 -5 - 0 0 - 5 5 - 10 10 - 15 15 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45

0000 0.0 0.0 0.0 0.0 0.4 2.5 35.6 50.8 10.6 0.0 0.0 0.0 0.0 0.0

0030 0.0 0.0 0.0 0.0 0.0 3.0 38.1 51.3 7.6 0.0 0.0 0.0 0.0 0.0

0100 0.0 0.0 0.0 0.0 0.0 3.0 42.2 49.4 5.5 0.0 0.0 0.0 0.0 0.0

0130 0.0 0.0 0.0 0.0 0.0 4.7 42.7 47.0 5.6 0.0 0.0 0.0 0.0 0.0

0200 0.0 0.0 0.0 0.0 0.4 5.1 47.7 41.3 5.5 0.0 0.0 0.0 0.0 0.0

0230 0.0 0.0 0.0 0.0 0.4 7.7 45.5 42.1 4.3 0.0 0.0 0.0 0.0 0.0

0300 0.0 0.0 0.0 0.0 0.4 7.5 47.7 39.7 4.6 0.0 0.0 0.0 0.0 0.0

0330 0.0 0.0 0.0 0.0 0.4 7.3 47.9 39.3 5.1 0.0 0.0 0.0 0.0 0.0

0400 0.0 0.0 0.0 0.0 0.4 9.0 47.2 39.5 3.9 0.0 0.0 0.0 0.0 0.0

0430 0.0 0.0 0.0 0.0 0.4 8.9 46.8 38.8 5.1 0.0 0.0 0.0 0.0 0.0

0500 0.0 0.0 0.0 0.0 0.4 7.2 44.7 42.6 5.1 0.0 0.0 0.0 0.0 0.0

0530 0.0 0.0 0.0 0.0 0.0 5.0 41.7 46.7 6.7 0.0 0.0 0.0 0.0 0.0

0600 0.0 0.0 0.0 0.0 0.0 3.0 33.0 53.2 9.9 0.9 0.0 0.0 0.0 0.0

0630 0.0 0.0 0.0 0.0 0.0 1.7 23.8 56.6 17.0 0.9 0.0 0.0 0.0 0.0

0700 0.0 0.0 0.0 0.0 0.0 1.3 17.4 56.4 23.7 1.3 0.0 0.0 0.0 0.0

0730 0.0 0.0 0.0 0.0 0.0 1.3 13.9 50.0 33.2 1.7 0.0 0.0 0.0 0.0

0800 0.0 0.0 0.0 0.0 0.0 1.3 12.3 41.3 39.6 5.5 0.0 0.0 0.0 0.0

0830 0.0 0.0 0.0 0.0 0.0 0.8 11.0 35.0 43.9 8.9 0.4 0.0 0.0 0.0

0900 0.0 0.0 0.0 0.0 0.0 0.4 9.6 29.1 47.8 11.7 1.3 0.0 0.0 0.0

0930 0.0 0.0 0.0 0.0 0.0 0.4 8.6 24.5 48.1 17.2 1.3 0.0 0.0 0.0

1000 0.0 0.0 0.0 0.0 0.0 0.0 8.5 21.3 46.4 22.1 1.7 0.0 0.0 0.0

1030 0.0 0.0 0.0 0.0 0.0 0.0 8.0 21.0 42.9 26.5 1.7 0.0 0.0 0.0

1100 0.0 0.0 0.0 0.0 0.0 0.0 7.2 17.9 43.4 29.8 1.7 0.0 0.0 0.0

1130 0.0 0.0 0.0 0.0 0.0 0.0 7.7 15.7 43.8 30.6 2.1 0.0 0.0 0.0

1200 0.0 0.0 0.0 0.0 0.0 0.0 7.8 15.9 40.5 33.6 2.2 0.0 0.0 0.0

1230 0.0 0.0 0.0 0.0 0.0 0.0 7.7 14.9 39.1 35.7 2.6 0.0 0.0 0.0

1300 0.0 0.0 0.0 0.0 0.0 0.0 7.2 16.6 37.0 35.3 3.8 0.0 0.0 0.0

1330 0.0 0.0 0.0 0.0 0.0 0.0 7.6 14.0 38.1 36.0 4.2 0.0 0.0 0.0

1400 0.0 0.0 0.0 0.0 0.0 0.0 6.7 14.7 37.0 37.0 4.6 0.0 0.0 0.0

1430 0.0 0.0 0.0 0.0 0.0 0.0 7.1 16.8 37.0 34.5 4.6 0.0 0.0 0.0

1500 0.0 0.0 0.0 0.0 0.0 0.0 7.2 17.9 37.0 34.0 3.8 0.0 0.0 0.0

1530 0.0 0.0 0.0 0.0 0.0 0.0 6.8 17.9 39.1 33.2 3.0 0.0 0.0 0.0

1600 0.0 0.0 0.0 0.0 0.0 0.0 7.2 20.3 40.9 28.7 3.0 0.0 0.0 0.0

1630 0.0 0.0 0.0 0.0 0.0 0.0 7.6 22.9 43.2 25.0 1.3 0.0 0.0 0.0

1700 0.0 0.0 0.0 0.0 0.0 0.0 8.1 26.7 47.9 16.9 0.4 0.0 0.0 0.0

1730 0.0 0.0 0.0 0.0 0.0 0.0 8.9 35.6 46.2 9.3 0.0 0.0 0.0 0.0

1800 0.0 0.0 0.0 0.0 0.0 0.4 10.2 42.4 41.5 5.5 0.0 0.0 0.0 0.0

1830 0.0 0.0 0.0 0.0 0.0 0.4 11.9 44.1 39.4 4.2 0.0 0.0 0.0 0.0

1900 0.0 0.0 0.0 0.0 0.0 0.4 13.4 46.6 36.6 2.9 0.0 0.0 0.0 0.0

1930 0.0 0.0 0.0 0.0 0.0 0.8 15.5 50.8 31.1 1.7 0.0 0.0 0.0 0.0

2000 0.0 0.0 0.0 0.0 0.0 0.8 15.3 52.5 29.7 1.7 0.0 0.0 0.0 0.0

2030 0.0 0.0 0.0 0.0 0.0 0.9 17.0 55.3 26.0 0.9 0.0 0.0 0.0 0.0

2100 0.0 0.0 0.0 0.0 0.0 0.9 20.9 56.2 20.9 1.3 0.0 0.0 0.0 0.0

2130 0.0 0.0 0.0 0.0 0.0 2.5 22.4 56.1 18.6 0.4 0.0 0.0 0.0 0.0

2200 0.0 0.0 0.0 0.0 0.0 3.0 24.7 55.7 16.6 0.0 0.0 0.0 0.0 0.0

2230 0.0 0.0 0.0 0.0 0.0 3.0 27.0 55.3 14.3 0.4 0.0 0.0 0.0 0.0

2300 0.0 0.0 0.0 0.0 0.0 3.4 30.5 53.0 13.1 0.0 0.0 0.0 0.0 0.0

2330 0.0 0.0 0.0 0.0 0.0 3.0 34.0 51.1 11.9 0.0 0.0 0.0 0.0 0.0

MEAN 0.0 0.0 0.0 0.0 0.1 2.1 21.3 37.6 26.9 11.2 0.9 0.0 0.0 0.0

REMARKS

TEMPERATURETIME

(UTC)

MODEL E

AERODROME: LYBE PERIOD OF RECORD: 2005 - 2012








Table 7. Frequencies of surface temperature in specified ranges of 5°C at the specified times – May (ICAO Model E)

MONTH: V

-25 - - 20 -20 - -15 -15 - -10 -10 - -5 -5 - 0 0 - 5 5 - 10 10 - 15 15 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45

0000 0.0 0.0 0.0 0.0 0.0 0.4 12.2 40.4 39.6 7.3 0.0 0.0 0.0 0.0

0030 0.0 0.0 0.0 0.0 0.0 0.4 12.7 44.1 36.7 6.1 0.0 0.0 0.0 0.0

0100 0.0 0.0 0.0 0.0 0.0 0.4 14.7 43.3 38.4 3.3 0.0 0.0 0.0 0.0

0130 0.0 0.0 0.0 0.0 0.0 1.2 15.9 42.4 36.7 3.7 0.0 0.0 0.0 0.0

0200 0.0 0.0 0.0 0.0 0.0 0.8 17.1 45.1 33.7 3.3 0.0 0.0 0.0 0.0

0230 0.0 0.0 0.0 0.0 0.0 0.8 18.4 46.5 31.0 3.3 0.0 0.0 0.0 0.0

0300 0.0 0.0 0.0 0.0 0.0 0.8 18.3 46.3 32.5 2.0 0.0 0.0 0.0 0.0

0330 0.0 0.0 0.0 0.0 0.0 0.8 19.9 45.5 32.1 1.6 0.0 0.0 0.0 0.0

0400 0.0 0.0 0.0 0.0 0.0 1.6 17.2 45.9 33.2 2.0 0.0 0.0 0.0 0.0

0430 0.0 0.0 0.0 0.0 0.0 0.8 15.4 44.5 35.2 4.0 0.0 0.0 0.0 0.0

0500 0.0 0.0 0.0 0.0 0.0 0.0 10.7 43.9 35.7 9.8 0.0 0.0 0.0 0.0

0530 0.0 0.0 0.0 0.0 0.0 0.0 8.2 38.4 40.8 12.7 0.0 0.0 0.0 0.0

0600 0.0 0.0 0.0 0.0 0.0 0.0 4.1 35.9 38.0 21.6 0.4 0.0 0.0 0.0

0630 0.0 0.0 0.0 0.0 0.0 0.0 3.7 30.6 38.0 26.5 1.2 0.0 0.0 0.0

0700 0.0 0.0 0.0 0.0 0.0 0.0 2.4 26.8 35.8 31.7 3.3 0.0 0.0 0.0

0730 0.0 0.0 0.0 0.0 0.0 0.0 1.6 21.5 35.0 35.4 6.5 0.0 0.0 0.0

0800 0.0 0.0 0.0 0.0 0.0 0.0 1.6 18.4 31.8 36.7 11.4 0.0 0.0 0.0

0830 0.0 0.0 0.0 0.0 0.0 0.0 1.2 16.7 30.9 35.8 14.6 0.8 0.0 0.0

0900 0.0 0.0 0.0 0.0 0.0 0.0 1.2 13.5 30.3 35.2 18.4 1.2 0.0 0.0

0930 0.0 0.0 0.0 0.0 0.0 0.0 1.2 10.7 32.0 32.0 22.5 1.6 0.0 0.0

1000 0.0 0.0 0.0 0.0 0.0 0.0 1.6 8.9 29.7 32.5 25.2 2.0 0.0 0.0

1030 0.0 0.0 0.0 0.0 0.0 0.0 1.6 10.3 26.7 30.5 28.4 2.5 0.0 0.0

1100 0.0 0.0 0.0 0.0 0.0 0.0 1.6 9.4 25.8 29.5 30.3 3.3 0.0 0.0

1130 0.0 0.0 0.0 0.0 0.0 0.0 1.6 8.1 24.7 30.4 31.6 3.6 0.0 0.0

1200 0.0 0.0 0.0 0.0 0.0 0.0 1.6 7.4 25.4 30.3 30.7 4.5 0.0 0.0

1230 0.0 0.0 0.0 0.0 0.0 0.0 1.6 8.1 23.8 30.6 30.6 5.2 0.0 0.0

1300 0.0 0.0 0.0 0.0 0.0 0.0 2.0 7.3 24.3 29.1 30.8 6.5 0.0 0.0

1330 0.0 0.0 0.0 0.0 0.0 0.0 2.0 7.8 21.6 29.8 32.7 5.7 0.4 0.0

1400 0.0 0.0 0.0 0.0 0.0 0.0 2.1 7.8 22.2 30.0 31.7 6.2 0.0 0.0

1430 0.0 0.0 0.0 0.0 0.0 0.0 2.5 7.8 23.0 27.9 32.8 6.1 0.0 0.0

1500 0.0 0.0 0.0 0.0 0.0 0.0 2.4 6.9 22.4 30.2 32.7 5.3 0.0 0.0

1530 0.0 0.0 0.0 0.0 0.0 0.0 2.4 7.7 24.0 28.9 31.7 5.3 0.0 0.0

1600 0.0 0.0 0.0 0.0 0.0 0.0 2.4 8.5 26.0 29.7 30.5 2.8 0.0 0.0

1630 0.0 0.0 0.0 0.0 0.0 0.0 2.4 8.9 28.9 34.1 23.6 2.0 0.0 0.0

1700 0.0 0.0 0.0 0.0 0.0 0.0 2.0 10.2 29.0 35.5 21.2 2.0 0.0 0.0

1730 0.0 0.0 0.0 0.0 0.0 0.0 2.4 13.0 29.7 37.4 16.7 0.8 0.0 0.0

1800 0.0 0.0 0.0 0.0 0.0 0.0 2.4 16.7 32.9 36.6 11.0 0.4 0.0 0.0

1830 0.0 0.0 0.0 0.0 0.0 0.0 2.8 19.5 35.4 34.1 8.1 0.0 0.0 0.0

1900 0.0 0.0 0.0 0.0 0.0 0.0 2.8 22.3 37.7 33.6 3.6 0.0 0.0 0.0

1930 0.0 0.0 0.0 0.0 0.0 0.0 2.8 25.6 38.2 31.7 1.6 0.0 0.0 0.0

2000 0.0 0.0 0.0 0.0 0.0 0.4 3.7 26.1 40.8 27.3 1.6 0.0 0.0 0.0

2030 0.0 0.0 0.0 0.0 0.0 0.4 4.0 30.8 38.9 24.7 1.2 0.0 0.0 0.0

2100 0.0 0.0 0.0 0.0 0.0 0.4 4.0 36.4 37.7 20.6 0.8 0.0 0.0 0.0

2130 0.0 0.0 0.0 0.0 0.0 0.4 4.5 37.0 37.0 20.6 0.4 0.0 0.0 0.0

2200 0.0 0.0 0.0 0.0 0.0 0.4 5.7 36.9 40.2 16.8 0.0 0.0 0.0 0.0

2230 0.0 0.0 0.0 0.0 0.0 0.4 7.0 38.7 41.2 12.8 0.0 0.0 0.0 0.0

2300 0.0 0.0 0.0 0.0 0.0 0.4 8.5 38.6 40.2 12.2 0.0 0.0 0.0 0.0

2330 0.0 0.0 0.0 0.0 0.0 0.4 11.0 37.8 40.2 10.6 0.0 0.0 0.0 0.0

MEAN 0.0 0.0 0.0 0.0 0.0 0.2 6.0 25.1 32.6 22.8 11.8 1.4 0.0 0.0

REMARKS

TEMPERATURETIME

(UTC)

MODEL E









Table 8. Frequencies of surface temperature in specified ranges of 5°C at the specified times – June (ICAO Model E)

MONTH: VI

-25 - - 20 -20 - -15 -15 - -10 -10 - -5 -5 - 0 0 - 5 5 - 10 10 - 15 15 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45

0000 0.0 0.0 0.0 0.0 0.0 0.0 2.6 17.4 47.7 30.6 1.7 0.0 0.0 0.0

0030 0.0 0.0 0.0 0.0 0.0 0.0 2.9 20.8 47.9 26.7 1.7 0.0 0.0 0.0

0100 0.0 0.0 0.0 0.0 0.0 0.0 3.3 20.9 50.2 24.3 1.3 0.0 0.0 0.0

0130 0.0 0.0 0.0 0.0 0.0 0.0 3.3 23.8 49.8 22.2 0.8 0.0 0.0 0.0

0200 0.0 0.0 0.0 0.0 0.0 0.0 3.0 24.6 50.8 20.3 1.3 0.0 0.0 0.0

0230 0.0 0.0 0.0 0.0 0.0 0.0 3.8 24.6 53.3 17.9 0.4 0.0 0.0 0.0

0300 0.0 0.0 0.0 0.0 0.0 0.0 3.3 27.1 52.1 17.1 0.4 0.0 0.0 0.0

0330 0.0 0.0 0.0 0.0 0.0 0.0 3.4 24.8 54.2 16.8 0.8 0.0 0.0 0.0

0400 0.0 0.0 0.0 0.0 0.0 0.0 2.5 22.9 54.6 19.6 0.4 0.0 0.0 0.0

0430 0.0 0.0 0.0 0.0 0.0 0.0 1.2 19.6 49.6 28.8 0.8 0.0 0.0 0.0

0500 0.0 0.0 0.0 0.0 0.0 0.0 1.3 16.0 44.5 33.6 4.6 0.0 0.0 0.0

0530 0.0 0.0 0.0 0.0 0.0 0.0 1.2 11.7 40.0 37.5 9.6 0.0 0.0 0.0

0600 0.0 0.0 0.0 0.0 0.0 0.0 0.8 10.5 35.4 39.7 13.5 0.0 0.0 0.0

0630 0.0 0.0 0.0 0.0 0.0 0.0 0.4 7.9 32.5 40.8 17.9 0.4 0.0 0.0

0700 0.0 0.0 0.0 0.0 0.0 0.0 0.4 7.5 26.8 37.7 25.9 1.7 0.0 0.0

0730 0.0 0.0 0.0 0.0 0.0 0.0 0.4 7.9 23.3 36.2 28.3 3.8 0.0 0.0

0800 0.0 0.0 0.0 0.0 0.0 0.0 0.4 6.7 19.6 33.8 34.2 5.4 0.0 0.0

0830 0.0 0.0 0.0 0.0 0.0 0.0 0.4 5.4 17.5 32.1 36.2 8.3 0.0 0.0

0900 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.2 16.5 30.4 36.7 11.0 0.4 0.0

0930 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.2 14.6 28.5 37.2 14.6 0.4 0.0

1000 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.8 12.5 27.5 37.9 17.1 0.4 0.0

1030 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.8 10.4 27.5 37.9 19.2 0.4 0.0

1100 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.8 10.1 27.3 36.1 21.8 0.4 0.0

1130 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.2 7.9 28.3 34.2 23.3 1.7 0.0

1200 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.2 9.6 25.5 33.9 24.7 1.7 0.0

1230 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.2 8.8 25.4 33.8 25.0 2.5 0.0

1300 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.2 9.2 23.0 33.1 27.2 2.9 0.0

1330 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.3 10.4 22.9 33.3 26.2 3.3 0.0

1400 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.9 10.5 24.8 30.7 27.3 3.4 0.0

1430 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.2 9.7 23.5 34.0 24.8 3.4 0.0

1500 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.2 9.6 23.4 36.0 23.4 2.9 0.0

1530 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.2 11.4 24.5 33.3 23.6 2.5 0.0

1600 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.8 11.4 27.5 32.6 22.5 1.7 0.0

1630 0.0 0.0 0.0 0.0 0.0 0.0 0.4 5.0 12.2 26.5 35.3 20.2 0.4 0.0

1700 0.0 0.0 0.0 0.0 0.0 0.0 0.4 5.0 12.5 31.2 32.5 17.9 0.4 0.0

1730 0.0 0.0 0.0 0.0 0.0 0.0 0.4 5.0 14.6 32.2 34.7 13.0 0.0 0.0

1800 0.0 0.0 0.0 0.0 0.0 0.0 0.4 7.1 16.8 35.7 34.9 5.0 0.0 0.0

1830 0.0 0.0 0.0 0.0 0.0 0.0 0.4 7.9 21.3 37.2 31.8 1.3 0.0 0.0

1900 0.0 0.0 0.0 0.0 0.0 0.0 0.4 8.8 26.8 36.8 26.4 0.8 0.0 0.0

1930 0.0 0.0 0.0 0.0 0.0 0.0 0.4 10.0 26.8 39.3 23.4 0.0 0.0 0.0

2000 0.0 0.0 0.0 0.0 0.0 0.0 0.8 8.8 31.8 40.2 18.0 0.4 0.0 0.0

2030 0.0 0.0 0.0 0.0 0.0 0.0 0.8 10.0 33.8 40.8 14.6 0.0 0.0 0.0

2100 0.0 0.0 0.0 0.0 0.0 0.0 0.8 11.3 37.7 41.8 8.4 0.0 0.0 0.0

2130 0.0 0.0 0.0 0.0 0.0 0.0 0.8 12.5 39.2 37.9 9.6 0.0 0.0 0.0

2200 0.0 0.0 0.0 0.0 0.0 0.0 1.3 13.0 41.4 38.1 6.3 0.0 0.0 0.0

2230 0.0 0.0 0.0 0.0 0.0 0.0 1.2 12.9 44.2 35.8 5.8 0.0 0.0 0.0

2300 0.0 0.0 0.0 0.0 0.0 0.0 1.3 12.6 45.8 35.3 5.0 0.0 0.0 0.0

2330 0.0 0.0 0.0 0.0 0.0 0.0 1.7 14.3 46.6 34.9 2.5 0.0 0.0 0.0

MEAN 0.0 0.0 0.0 0.0 0.0 0.0 1.1 10.5 28.4 30.2 20.6 8.5 0.6 0.0

REMARKS

TEMPERATURETIME

(UTC)

MODEL E









Table 9. Frequencies of surface temperature in specified ranges of 5°C at the specified times – July (ICAO Model E)

MONTH:VII

-25 - - 20 -20 - -15 -15 - -10 -10 - -5 -5 - 0 0 - 5 5 - 10 10 - 15 15 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45

0000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5.6 45.2 39.5 9.7 0.0 0.0 0.0

0030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6.1 47.8 40.5 5.7 0.0 0.0 0.0

0100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6.5 49.4 39.7 4.5 0.0 0.0 0.0

0130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6.9 52.2 37.7 3.2 0.0 0.0 0.0

0200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 8.5 53.0 35.6 2.8 0.0 0.0 0.0

0230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11.4 51.0 35.1 2.4 0.0 0.0 0.0

0300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12.2 55.9 29.4 2.4 0.0 0.0 0.0

0330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12.6 58.3 26.7 2.4 0.0 0.0 0.0

0400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 9.7 56.5 30.6 3.2 0.0 0.0 0.0

0430 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6.9 51.2 36.3 5.2 0.4 0.0 0.0

0500 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5.2 41.5 44.0 9.3 0.0 0.0 0.0

0530 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.6 31.9 47.6 16.9 0.0 0.0 0.0

0600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.6 25.9 50.6 20.6 1.2 0.0 0.0

0630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.6 21.5 46.3 27.2 3.3 0.0 0.0

0700 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 16.7 40.4 34.3 6.9 0.4 0.0

0730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 13.0 38.1 36.4 10.9 0.4 0.0

0800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 11.8 34.1 37.0 15.4 0.8 0.0

0830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 9.8 30.5 38.2 19.1 1.6 0.0

0900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 8.1 27.2 37.8 23.6 2.0 0.0

0930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 7.0 25.4 38.1 25.4 3.3 0.0

1000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 7.0 23.5 36.6 28.8 3.7 0.4

1030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6.5 21.9 34.4 30.0 6.9 0.4

1100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6.5 19.2 36.7 29.0 8.2 0.4

1130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6.1 19.2 35.5 29.0 9.8 0.4

1200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5.8 17.4 36.4 28.5 11.6 0.4

1230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.9 17.8 36.4 29.1 11.3 0.4

1300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.9 17.2 36.1 28.7 12.3 0.8

1330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.5 18.4 33.5 30.6 12.7 0.4

1400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.5 17.2 34.0 29.9 13.5 0.8

1430 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.5 16.7 34.3 31.0 12.7 0.8

1500 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.5 18.3 33.7 30.5 12.2 0.8

1530 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5.3 17.1 34.7 31.4 10.6 0.8

1600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5.3 19.5 35.0 30.1 9.8 0.4

1630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.9 20.7 37.0 28.9 8.1 0.0

1700 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 5.7 25.5 33.2 28.7 6.5 0.0

1730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 6.9 27.9 35.6 27.5 1.2 0.0

1800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 8.9 34.4 37.7 18.2 0.0 0.0

1830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 13.0 35.6 38.1 12.1 0.0 0.0

1900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.6 15.0 39.0 36.6 7.3 0.4 0.0

1930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.6 17.4 41.7 33.2 6.1 0.0 0.0

2000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.6 20.3 45.1 29.7 3.3 0.0 0.0

2030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.0 26.3 40.9 27.9 2.8 0.0 0.0

2100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.1 28.6 45.2 22.8 1.2 0.0 0.0

2130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.4 33.2 44.1 18.6 1.6 0.0 0.0

2200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.4 33.3 47.6 16.7 0.0 0.0 0.0

2230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.3 38.6 43.1 14.6 0.4 0.0 0.0

2300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.1 38.6 43.1 14.2 0.0 0.0 0.0

2330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.5 40.9 43.3 11.3 0.0 0.0 0.0

MEAN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.8 23.1 32.4 25.0 13.1 3.3 0.2

REMARKS

TEMPERATURETIME

(UTC)

MODEL E









Table 10. Frequencies of surface temperature in specified ranges of 5°C at the specified times – August (ICAO Model E)

MONTH: VIII

-25 - - 20 -20 - -15 -15 - -10 -10 - -5 -5 - 0 0 - 5 5 - 10 10 - 15 15 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45

0000 0.0 0.0 0.0 0.0 0.0 0.0 0.4 5.4 53.3 35.8 4.6 0.4 0.0 0.0

0030 0.0 0.0 0.0 0.0 0.0 0.0 0.4 8.2 52.7 34.3 4.1 0.4 0.0 0.0

0100 0.0 0.0 0.0 0.0 0.0 0.0 0.4 9.7 55.5 30.0 4.0 0.4 0.0 0.0

0130 0.0 0.0 0.0 0.0 0.0 0.0 0.4 11.0 56.9 28.9 2.4 0.4 0.0 0.0

0200 0.0 0.0 0.0 0.0 0.0 0.0 0.4 12.2 57.7 26.8 2.8 0.0 0.0 0.0

0230 0.0 0.0 0.0 0.0 0.0 0.0 0.4 13.4 59.9 24.7 1.6 0.0 0.0 0.0

0300 0.0 0.0 0.0 0.0 0.0 0.0 0.4 13.8 61.5 22.7 1.6 0.0 0.0 0.0

0330 0.0 0.0 0.0 0.0 0.0 0.0 0.4 14.2 61.8 22.4 1.2 0.0 0.0 0.0

0400 0.0 0.0 0.0 0.0 0.0 0.0 0.4 15.4 61.1 21.9 1.2 0.0 0.0 0.0

0430 0.0 0.0 0.0 0.0 0.0 0.0 0.4 13.8 60.3 23.9 1.6 0.0 0.0 0.0

0500 0.0 0.0 0.0 0.0 0.0 0.0 0.4 8.2 58.8 30.2 2.4 0.0 0.0 0.0

0530 0.0 0.0 0.0 0.0 0.0 0.0 0.0 6.5 51.0 36.8 5.7 0.0 0.0 0.0

0600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.8 42.1 45.0 9.2 0.0 0.0 0.0

0630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.4 34.0 44.9 17.8 0.8 0.0 0.0

0700 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.0 23.7 50.2 21.2 2.9 0.0 0.0

0730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 18.5 45.2 30.2 4.8 0.0 0.0

0800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 12.7 40.0 38.0 8.2 0.0 0.0

0830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 11.0 38.2 37.4 11.8 0.4 0.0

0900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 9.1 31.4 40.1 17.4 1.2 0.0

0930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 9.0 30.2 37.1 19.6 3.3 0.0

1000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 7.3 27.8 36.7 23.8 3.6 0.0

1030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 7.3 25.6 36.2 24.8 5.3 0.0

1100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 6.6 22.6 36.6 27.2 6.2 0.0

1130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 5.3 22.9 34.7 30.2 6.1 0.0

1200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.9 20.2 36.2 29.2 8.2 0.4

1230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.9 19.5 34.6 30.9 8.9 0.4

1300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.9 17.9 37.4 30.5 8.5 0.4

1330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.8 17.7 35.9 31.5 8.9 0.4

1400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 5.3 16.7 36.2 31.7 9.3 0.0

1430 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 5.3 17.4 34.4 33.2 8.9 0.0

1500 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 5.7 16.8 34.0 33.6 9.0 0.0

1530 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 6.5 17.7 34.7 32.3 7.7 0.0

1600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 7.0 18.0 34.4 31.6 7.8 0.0

1630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 7.7 21.1 36.2 28.5 5.3 0.0

1700 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 8.2 25.9 35.0 25.9 3.7 0.0

1730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 11.0 30.6 37.6 19.2 0.4 0.0

1800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.7 11.3 36.4 40.2 10.5 0.0 0.0

1830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.6 14.5 41.5 34.7 7.7 0.0 0.0

1900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.0 19.8 39.1 35.9 3.2 0.0 0.0

1930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.0 19.8 46.2 29.1 2.8 0.0 0.0

2000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.8 21.9 48.2 25.1 2.0 0.0 0.0

2030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.2 24.7 49.8 20.6 1.6 0.0 0.0

2100 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.1 28.0 47.3 19.3 0.8 0.0 0.0

2130 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.1 32.1 47.6 15.0 0.8 0.0 0.0

2200 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.7 37.7 44.3 13.1 0.8 0.0 0.0

2230 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.1 43.7 40.8 10.6 0.4 0.0 0.0

2300 0.0 0.0 0.0 0.0 0.0 0.0 0.4 6.1 43.7 41.2 8.2 0.4 0.0 0.0

2330 0.0 0.0 0.0 0.0 0.0 0.0 0.4 7.3 46.5 39.2 6.5 0.0 0.0 0.0

MEAN 0.0 0.0 0.0 0.0 0.0 0.0 0.1 4.2 27.0 31.7 22.8 11.7 2.3 0.0

REMARKS

TEMPERATURETIME

(UTC)

MODEL E









Table 11. Frequencies of surface temperature in specified ranges of 5°C at the specified times – September (ICAO Model E)

MONTH: IX

-25 - - 20 -20 - -15 -15 - -10 -10 - -5 -5 - 0 0 - 5 5 - 10 10 - 15 15 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45

0000 0.0 0.0 0.0 0.0 0.0 0.0 5.0 34.3 47.3 11.7 1.7 0.0 0.0 0.0

0030 0.0 0.0 0.0 0.0 0.0 0.0 4.2 38.2 45.0 11.8 0.8 0.0 0.0 0.0

0100 0.0 0.0 0.0 0.0 0.0 0.0 5.5 42.0 41.6 10.5 0.4 0.0 0.0 0.0

0130 0.0 0.0 0.0 0.0 0.0 0.0 6.3 44.5 38.2 10.9 0.0 0.0 0.0 0.0

0200 0.0 0.0 0.0 0.0 0.0 0.0 7.6 44.5 39.9 8.0 0.0 0.0 0.0 0.0

0230 0.0 0.0 0.0 0.0 0.0 0.0 8.8 43.9 39.7 7.5 0.0 0.0 0.0 0.0

0300 0.0 0.0 0.0 0.0 0.0 0.0 8.4 48.1 36.8 6.3 0.4 0.0 0.0 0.0

0330 0.0 0.0 0.0 0.0 0.0 0.0 9.7 47.7 36.7 5.9 0.0 0.0 0.0 0.0

0400 0.0 0.0 0.0 0.0 0.0 0.0 11.1 48.9 34.9 5.1 0.0 0.0 0.0 0.0

0430 0.0 0.0 0.0 0.0 0.0 0.0 11.4 47.7 35.4 5.5 0.0 0.0 0.0 0.0

0500 0.0 0.0 0.0 0.0 0.0 0.4 10.1 45.8 38.2 5.5 0.0 0.0 0.0 0.0

0530 0.0 0.0 0.0 0.0 0.0 0.0 8.0 43.0 39.7 9.3 0.0 0.0 0.0 0.0

0600 0.0 0.0 0.0 0.0 0.0 0.0 4.2 36.1 44.1 15.1 0.4 0.0 0.0 0.0

0630 0.0 0.0 0.0 0.0 0.0 0.0 2.9 29.7 44.8 20.5 2.1 0.0 0.0 0.0

0700 0.0 0.0 0.0 0.0 0.0 0.0 1.7 22.7 44.1 25.6 5.9 0.0 0.0 0.0

0730 0.0 0.0 0.0 0.0 0.0 0.0 0.4 20.9 36.4 33.1 8.8 0.4 0.0 0.0

0800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 17.4 35.2 36.0 9.7 1.7 0.0 0.0

0830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 14.8 29.5 38.4 14.8 2.5 0.0 0.0

0900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12.7 26.3 39.8 17.4 3.8 0.0 0.0

0930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12.3 20.0 39.6 23.4 4.7 0.0 0.0

1000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11.4 16.5 40.1 25.7 5.9 0.4 0.0

1030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11.0 16.0 35.9 29.1 7.6 0.4 0.0

1100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11.1 13.6 35.3 30.2 8.9 0.9 0.0

1130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 10.6 13.1 36.0 28.8 10.6 0.8 0.0

1200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 10.1 13.1 35.0 29.5 11.4 0.8 0.0

1230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 10.2 12.3 31.9 31.5 13.2 0.9 0.0

1300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 10.5 11.4 32.5 30.4 14.3 0.8 0.0

1330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 9.8 13.2 30.6 31.9 13.2 1.3 0.0

1400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 8.1 14.8 30.1 32.2 13.6 1.3 0.0

1430 0.0 0.0 0.0 0.0 0.0 0.0 0.0 9.7 14.0 32.6 29.7 13.1 0.8 0.0

1500 0.0 0.0 0.0 0.0 0.0 0.0 0.0 9.7 14.8 34.2 28.3 12.2 0.8 0.0

1530 0.0 0.0 0.0 0.0 0.0 0.0 0.0 10.1 15.5 35.7 26.9 10.9 0.8 0.0

1600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 10.5 17.3 36.7 26.6 8.0 0.8 0.0

1630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 11.8 21.1 39.2 21.5 6.3 0.0 0.0

1700 0.0 0.0 0.0 0.0 0.0 0.0 0.0 12.2 26.1 41.2 17.6 2.9 0.0 0.0

1730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 14.3 31.9 37.4 15.5 0.8 0.0 0.0

1800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 13.8 38.5 35.6 11.7 0.4 0.0 0.0

1830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 15.6 43.0 30.8 10.1 0.4 0.0 0.0

1900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 17.6 43.7 29.8 8.4 0.4 0.0 0.0

1930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 18.4 47.7 27.2 6.7 0.0 0.0 0.0

2000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 21.5 47.7 23.2 7.6 0.0 0.0 0.0

2030 0.0 0.0 0.0 0.0 0.0 0.0 0.8 23.1 50.4 20.2 5.5 0.0 0.0 0.0

2100 0.0 0.0 0.0 0.0 0.0 0.0 0.8 25.4 50.0 19.2 4.6 0.0 0.0 0.0

2130 0.0 0.0 0.0 0.0 0.0 0.0 0.8 27.4 48.5 19.0 4.2 0.0 0.0 0.0

2200 0.0 0.0 0.0 0.0 0.0 0.0 1.3 30.5 46.4 19.2 2.5 0.0 0.0 0.0

2230 0.0 0.0 0.0 0.0 0.0 0.0 1.3 33.9 45.2 16.7 2.9 0.0 0.0 0.0

2300 0.0 0.0 0.0 0.0 0.0 0.0 2.1 34.0 45.4 16.8 1.7 0.0 0.0 0.0

2330 0.0 0.0 0.0 0.0 0.0 0.0 3.4 35.2 44.1 15.7 1.7 0.0 0.0 0.0

MEAN 0.0 0.0 0.0 0.0 0.0 0.0 2.4 24.2 32.7 24.7 12.3 3.5 0.2 0.0

REMARKS

TEMPERATURETIME

(UTC)

MODEL E









Table 12. Frequencies of surface temperature in specified ranges of 5°C at the specified times – October (ICAO Model E)

MONTH: X

-25 - - 20 -20 - -15 -15 - -10 -10 - -5 -5 - 0 0 - 5 5 - 10 10 - 15 15 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45

0000 0.0 0.0 0.0 0.0 0.0 11.4 27.8 46.5 13.1 1.2 0.0 0.0 0.0 0.0

0030 0.0 0.0 0.0 0.0 0.8 11.4 28.0 46.3 12.6 0.8 0.0 0.0 0.0 0.0

0100 0.0 0.0 0.0 0.0 1.2 11.3 30.0 44.5 12.1 0.8 0.0 0.0 0.0 0.0

0130 0.0 0.0 0.0 0.0 0.8 13.0 28.9 45.1 11.4 0.8 0.0 0.0 0.0 0.0

0200 0.0 0.0 0.0 0.0 1.2 14.8 29.1 43.4 10.7 0.8 0.0 0.0 0.0 0.0

0230 0.0 0.0 0.0 0.0 1.6 15.4 30.8 38.9 12.6 0.8 0.0 0.0 0.0 0.0

0300 0.0 0.0 0.0 0.0 2.0 14.6 29.7 41.5 11.8 0.4 0.0 0.0 0.0 0.0

0330 0.0 0.0 0.0 0.0 2.4 13.8 32.5 41.9 8.9 0.4 0.0 0.0 0.0 0.0

0400 0.0 0.0 0.0 0.0 2.8 13.8 34.0 40.1 8.5 0.8 0.0 0.0 0.0 0.0

0430 0.0 0.0 0.0 0.0 2.4 14.7 34.7 38.8 8.6 0.8 0.0 0.0 0.0 0.0

0500 0.0 0.0 0.0 0.0 2.0 15.8 35.6 38.1 7.7 0.8 0.0 0.0 0.0 0.0

0530 0.0 0.0 0.0 0.0 2.4 14.3 34.7 38.4 9.4 0.8 0.0 0.0 0.0 0.0

0600 0.0 0.0 0.0 0.0 2.0 11.3 32.8 41.7 11.3 0.8 0.0 0.0 0.0 0.0

0630 0.0 0.0 0.0 0.0 0.8 9.3 30.8 42.9 15.4 0.8 0.0 0.0 0.0 0.0

0700 0.0 0.0 0.0 0.0 0.0 8.2 28.6 40.4 21.2 1.6 0.0 0.0 0.0 0.0

0730 0.0 0.0 0.0 0.0 0.0 6.1 25.2 39.0 25.6 4.1 0.0 0.0 0.0 0.0

0800 0.0 0.0 0.0 0.0 0.0 2.4 23.7 38.0 29.8 6.1 0.0 0.0 0.0 0.0

0830 0.0 0.0 0.0 0.0 0.0 1.6 21.9 34.8 30.8 10.5 0.4 0.0 0.0 0.0

0900 0.0 0.0 0.0 0.0 0.0 1.2 19.8 32.7 30.6 14.9 0.8 0.0 0.0 0.0

0930 0.0 0.0 0.0 0.0 0.0 0.8 17.1 31.0 32.7 16.3 2.0 0.0 0.0 0.0

1000 0.0 0.0 0.0 0.0 0.0 0.0 15.1 32.2 27.3 21.6 3.7 0.0 0.0 0.0

1030 0.0 0.0 0.0 0.0 0.0 0.0 14.4 28.0 28.4 23.5 5.8 0.0 0.0 0.0

1100 0.0 0.0 0.0 0.0 0.0 0.0 11.0 26.9 29.8 24.1 7.8 0.4 0.0 0.0

1130 0.0 0.0 0.0 0.0 0.0 0.0 11.3 25.4 29.0 24.6 9.3 0.4 0.0 0.0

1200 0.0 0.0 0.0 0.0 0.0 0.4 9.7 25.0 29.0 25.4 10.1 0.4 0.0 0.0

1230 0.0 0.0 0.0 0.0 0.0 0.0 9.4 25.8 27.9 25.8 10.2 0.8 0.0 0.0

1300 0.0 0.0 0.0 0.0 0.0 0.0 9.8 26.0 25.2 28.5 9.8 0.8 0.0 0.0

1330 0.0 0.0 0.0 0.0 0.0 0.4 9.4 26.5 26.1 26.9 9.8 0.8 0.0 0.0

1400 0.0 0.0 0.0 0.0 0.0 0.4 9.3 26.7 26.7 27.1 8.9 0.8 0.0 0.0

1430 0.0 0.0 0.0 0.0 0.0 0.8 9.7 27.5 28.7 23.5 8.9 0.8 0.0 0.0

1500 0.0 0.0 0.0 0.0 0.0 0.8 11.7 29.4 27.8 22.2 7.3 0.8 0.0 0.0

1530 0.0 0.0 0.0 0.0 0.0 0.8 14.2 30.9 28.5 18.3 7.3 0.0 0.0 0.0

1600 0.0 0.0 0.0 0.0 0.0 1.2 14.6 31.2 30.8 17.8 4.5 0.0 0.0 0.0

1630 0.0 0.0 0.0 0.0 0.0 1.2 17.9 34.6 30.5 14.6 1.2 0.0 0.0 0.0

1700 0.0 0.0 0.0 0.0 0.0 2.4 18.4 37.1 29.0 12.7 0.4 0.0 0.0 0.0

1730 0.0 0.0 0.0 0.0 0.0 3.3 22.4 33.9 29.8 10.2 0.4 0.0 0.0 0.0

1800 0.0 0.0 0.0 0.0 0.0 4.1 22.1 34.0 32.8 6.6 0.4 0.0 0.0 0.0

1830 0.0 0.0 0.0 0.0 0.0 4.1 24.8 35.0 29.7 6.5 0.0 0.0 0.0 0.0

1900 0.0 0.0 0.0 0.0 0.0 3.7 26.0 36.2 28.5 5.3 0.4 0.0 0.0 0.0

1930 0.0 0.0 0.0 0.0 0.0 4.9 24.9 39.2 24.9 5.7 0.4 0.0 0.0 0.0

2000 0.0 0.0 0.0 0.0 0.0 6.1 26.0 39.4 24.0 4.5 0.0 0.0 0.0 0.0

2030 0.0 0.0 0.0 0.0 0.0 6.5 27.2 43.1 19.9 3.3 0.0 0.0 0.0 0.0

2100 0.0 0.0 0.0 0.0 0.0 7.7 27.5 42.1 20.2 2.4 0.0 0.0 0.0 0.0

2130 0.0 0.0 0.0 0.0 0.0 8.1 27.1 45.7 16.6 2.4 0.0 0.0 0.0 0.0

2200 0.0 0.0 0.0 0.0 0.4 9.3 27.6 42.7 17.9 2.0 0.0 0.0 0.0 0.0

2230 0.0 0.0 0.0 0.0 0.4 8.9 28.5 45.1 15.0 2.0 0.0 0.0 0.0 0.0

2300 0.0 0.0 0.0 0.0 0.8 9.5 27.6 45.7 14.8 1.6 0.0 0.0 0.0 0.0

2330 0.0 0.0 0.0 0.0 0.4 9.8 29.8 44.5 14.3 1.2 0.0 0.0 0.0 0.0

MEAN 0.0 0.0 0.0 0.0 0.5 6.2 23.0 36.7 21.6 9.5 2.3 0.1 0.0 0.0

REMARKS

TEMPERATURETIME

(UTC)

MODEL E









Table 13. Frequencies of surface temperature in specified ranges of 5°C at the specified times – November (ICAO Model E)

MONTH: XI

-25 - - 20 -20 - -15 -15 - -10 -10 - -5 -5 - 0 0 - 5 5 - 10 10 - 15 15 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45

0000 0.0 0.0 0.0 0.0 12.6 24.8 40.8 18.5 3.4 0.0 0.0 0.0 0.0 0.0

0030 0.0 0.0 0.0 0.0 12.2 27.0 40.9 16.0 3.8 0.0 0.0 0.0 0.0 0.0

0100 0.0 0.0 0.0 0.0 12.6 28.0 38.9 17.2 3.3 0.0 0.0 0.0 0.0 0.0

0130 0.0 0.0 0.0 0.0 14.7 29.8 37.0 16.4 2.1 0.0 0.0 0.0 0.0 0.0

0200 0.0 0.0 0.0 0.0 14.3 28.6 39.9 14.3 2.9 0.0 0.0 0.0 0.0 0.0

0230 0.0 0.0 0.0 0.0 14.3 30.3 37.8 15.5 2.1 0.0 0.0 0.0 0.0 0.0

0300 0.0 0.0 0.0 0.0 15.5 30.7 36.1 15.1 2.5 0.0 0.0 0.0 0.0 0.0

0330 0.0 0.0 0.0 0.0 14.6 31.8 36.8 14.2 2.5 0.0 0.0 0.0 0.0 0.0

0400 0.0 0.0 0.0 0.4 17.3 28.3 38.8 13.5 1.7 0.0 0.0 0.0 0.0 0.0

0430 0.0 0.0 0.0 0.0 16.2 29.6 38.8 13.3 2.1 0.0 0.0 0.0 0.0 0.0

0500 0.0 0.0 0.0 0.0 16.7 30.8 37.1 13.3 2.1 0.0 0.0 0.0 0.0 0.0

0530 0.0 0.0 0.0 0.0 17.6 31.9 35.3 13.0 2.1 0.0 0.0 0.0 0.0 0.0

0600 0.0 0.0 0.0 0.0 16.4 31.5 36.1 14.3 1.7 0.0 0.0 0.0 0.0 0.0

0630 0.0 0.0 0.0 0.0 16.3 30.1 36.4 15.1 2.1 0.0 0.0 0.0 0.0 0.0

0700 0.0 0.0 0.0 0.0 15.3 24.3 38.3 19.1 3.0 0.0 0.0 0.0 0.0 0.0

0730 0.0 0.0 0.0 0.0 10.4 26.7 37.9 20.4 4.2 0.4 0.0 0.0 0.0 0.0

0800 0.0 0.0 0.0 0.0 8.8 22.3 36.1 25.6 6.3 0.8 0.0 0.0 0.0 0.0

0830 0.0 0.0 0.0 0.0 5.9 20.6 37.0 27.7 8.4 0.4 0.0 0.0 0.0 0.0

0900 0.0 0.0 0.0 0.0 4.6 18.9 35.7 30.3 8.8 1.7 0.0 0.0 0.0 0.0

0930 0.0 0.0 0.0 0.0 4.6 18.3 28.8 34.2 11.2 2.9 0.0 0.0 0.0 0.0

1000 0.0 0.0 0.0 0.0 4.2 14.7 29.0 33.6 13.0 5.5 0.0 0.0 0.0 0.0

1030 0.0 0.0 0.0 0.0 3.4 13.0 28.6 31.5 16.8 6.7 0.0 0.0 0.0 0.0

1100 0.0 0.0 0.0 0.0 3.8 12.6 26.5 31.9 18.5 6.7 0.0 0.0 0.0 0.0

1130 0.0 0.0 0.0 0.0 3.8 9.7 25.7 33.3 20.7 6.8 0.0 0.0 0.0 0.0

1200 0.0 0.0 0.0 0.0 3.4 9.7 24.9 32.1 21.5 8.0 0.4 0.0 0.0 0.0

1230 0.0 0.0 0.0 0.0 3.3 9.6 25.1 29.7 23.0 9.2 0.0 0.0 0.0 0.0

1300 0.0 0.0 0.0 0.0 3.0 10.1 23.2 30.4 24.1 9.3 0.0 0.0 0.0 0.0

1330 0.0 0.0 0.0 0.0 2.9 10.5 25.2 29.0 23.5 8.8 0.0 0.0 0.0 0.0

1400 0.0 0.0 0.0 0.0 2.5 11.3 26.1 29.8 23.1 7.1 0.0 0.0 0.0 0.0

1430 0.0 0.0 0.0 0.0 2.5 12.3 26.3 36.0 16.1 6.8 0.0 0.0 0.0 0.0

1500 0.0 0.0 0.0 0.0 2.9 13.4 28.0 36.8 15.1 3.8 0.0 0.0 0.0 0.0

1530 0.0 0.0 0.0 0.0 2.5 15.6 31.6 35.9 12.7 1.7 0.0 0.0 0.0 0.0

1600 0.0 0.0 0.0 0.0 3.0 17.8 31.4 36.0 10.6 1.3 0.0 0.0 0.0 0.0

1630 0.0 0.0 0.0 0.0 3.8 18.6 33.1 33.5 11.0 0.0 0.0 0.0 0.0 0.0

1700 0.0 0.0 0.0 0.0 3.8 19.1 36.0 32.2 8.9 0.0 0.0 0.0 0.0 0.0

1730 0.0 0.0 0.0 0.0 5.1 18.6 35.9 33.3 7.2 0.0 0.0 0.0 0.0 0.0

1800 0.0 0.0 0.0 0.0 5.9 18.0 39.3 30.5 6.3 0.0 0.0 0.0 0.0 0.0

1830 0.0 0.0 0.0 0.0 5.5 19.7 40.3 29.4 4.6 0.4 0.0 0.0 0.0 0.0

1900 0.0 0.0 0.0 0.0 5.1 21.7 39.6 28.9 4.3 0.4 0.0 0.0 0.0 0.0

1930 0.0 0.0 0.0 0.0 5.9 22.7 37.8 28.2 5.0 0.4 0.0 0.0 0.0 0.0

2000 0.0 0.0 0.0 0.0 6.3 23.5 37.4 26.9 5.9 0.0 0.0 0.0 0.0 0.0

2030 0.0 0.0 0.0 0.0 6.7 23.0 40.6 25.5 3.8 0.4 0.0 0.0 0.0 0.0

2100 0.0 0.0 0.0 0.0 6.7 24.3 41.4 23.4 4.2 0.0 0.0 0.0 0.0 0.0

2130 0.0 0.0 0.0 0.0 7.6 24.4 40.8 23.5 3.8 0.0 0.0 0.0 0.0 0.0

2200 0.0 0.0 0.0 0.0 8.8 24.7 43.1 19.2 4.2 0.0 0.0 0.0 0.0 0.0

2230 0.0 0.0 0.0 0.0 8.8 26.8 41.4 18.4 4.6 0.0 0.0 0.0 0.0 0.0

2300 0.0 0.0 0.0 0.0 9.8 23.8 43.8 17.9 4.7 0.0 0.0 0.0 0.0 0.0

2330 0.0 0.0 0.0 0.0 11.3 23.8 42.7 18.8 3.3 0.0 0.0 0.0 0.0 0.0

MEAN 0.0 0.0 0.0 0.0 8.4 21.6 35.2 24.6 8.3 1.9 0.0 0.0 0.0 0.0

REMARKS

TEMPERATURETIME

(UTC)

MODEL E









Table 14. Frequencies of surface temperature in specified ranges of 5°C at the specified times – December (ICAO Model E)

MONTH: XII

-25 - - 20 -20 - -15 -15 - -10 -10 - -5 -5 - 0 0 - 5 5 - 10 10 - 15 15 - 20 20 - 25 25 - 30 30 - 35 35 - 40 40 - 45

0000 0.0 0.0 0.8 6.6 31.0 30.6 22.7 7.4 0.8 0.0 0.0 0.0 0.0 0.0

0030 0.0 0.0 0.4 7.0 29.6 30.5 24.3 7.0 1.2 0.0 0.0 0.0 0.0 0.0

0100 0.0 0.0 0.8 7.1 29.0 31.1 23.2 7.9 0.8 0.0 0.0 0.0 0.0 0.0

0130 0.0 0.0 1.2 7.5 29.0 32.0 21.6 8.3 0.4 0.0 0.0 0.0 0.0 0.0

0200 0.0 0.4 0.8 8.2 28.4 32.5 22.2 7.0 0.4 0.0 0.0 0.0 0.0 0.0

0230 0.0 0.4 0.8 7.8 28.3 32.4 22.1 7.8 0.4 0.0 0.0 0.0 0.0 0.0

0300 0.0 0.4 0.8 7.4 28.3 32.8 22.1 7.8 0.4 0.0 0.0 0.0 0.0 0.0

0330 0.0 0.4 0.4 7.3 31.0 31.9 22.2 6.5 0.4 0.0 0.0 0.0 0.0 0.0

0400 0.0 0.8 0.8 6.9 29.1 34.0 21.9 6.1 0.4 0.0 0.0 0.0 0.0 0.0

0430 0.4 0.4 0.0 7.7 30.0 34.0 19.8 6.9 0.8 0.0 0.0 0.0 0.0 0.0

0500 0.0 0.4 0.8 7.3 32.3 31.5 20.2 6.9 0.8 0.0 0.0 0.0 0.0 0.0

0530 0.0 0.4 0.4 6.9 32.5 32.1 19.5 7.7 0.4 0.0 0.0 0.0 0.0 0.0

0600 0.0 0.4 0.4 6.1 33.3 32.1 18.7 8.1 0.8 0.0 0.0 0.0 0.0 0.0

0630 0.0 0.0 0.8 6.5 33.2 32.4 19.0 7.7 0.4 0.0 0.0 0.0 0.0 0.0

0700 0.0 0.0 0.8 5.7 33.5 31.0 20.0 8.2 0.8 0.0 0.0 0.0 0.0 0.0

0730 0.0 0.0 0.4 5.7 31.6 30.8 21.1 9.7 0.8 0.0 0.0 0.0 0.0 0.0

0800 0.0 0.4 0.0 4.9 28.7 33.2 21.1 10.1 1.6 0.0 0.0 0.0 0.0 0.0

0830 0.0 0.0 0.4 4.9 24.9 35.1 21.2 11.0 2.4 0.0 0.0 0.0 0.0 0.0

0900 0.0 0.0 0.4 4.1 23.7 34.7 22.0 11.0 4.1 0.0 0.0 0.0 0.0 0.0

0930 0.0 0.0 0.4 4.0 23.0 33.5 22.6 11.3 5.2 0.0 0.0 0.0 0.0 0.0

1000 0.0 0.0 0.4 2.9 22.6 31.7 25.9 11.1 5.3 0.0 0.0 0.0 0.0 0.0

1030 0.0 0.0 0.4 2.4 22.8 29.3 28.0 10.6 6.5 0.0 0.0 0.0 0.0 0.0

1100 0.0 0.0 0.0 2.8 22.4 26.4 30.5 10.2 7.7 0.0 0.0 0.0 0.0 0.0

1130 0.0 0.0 0.0 2.8 21.1 26.7 30.4 11.3 7.7 0.0 0.0 0.0 0.0 0.0

1200 0.0 0.0 0.0 3.3 19.9 25.6 31.7 11.0 8.5 0.0 0.0 0.0 0.0 0.0

1230 0.0 0.0 0.0 3.3 20.0 26.1 30.2 12.2 8.2 0.0 0.0 0.0 0.0 0.0

1300 0.0 0.0 0.0 2.8 20.2 25.9 30.0 13.4 7.7 0.0 0.0 0.0 0.0 0.0

1330 0.0 0.0 0.0 2.9 20.5 26.2 29.9 13.5 7.0 0.0 0.0 0.0 0.0 0.0

1400 0.0 0.0 0.0 2.4 21.5 25.2 30.5 13.8 6.5 0.0 0.0 0.0 0.0 0.0

1430 0.0 0.0 0.0 2.0 22.0 26.5 31.4 12.7 5.3 0.0 0.0 0.0 0.0 0.0

1500 0.0 0.0 0.0 2.8 22.3 29.6 29.1 12.6 3.6 0.0 0.0 0.0 0.0 0.0

1530 0.0 0.0 0.0 2.9 23.3 32.2 27.8 11.0 2.9 0.0 0.0 0.0 0.0 0.0

1600 0.0 0.0 0.0 3.3 25.0 33.2 25.0 10.7 2.9 0.0 0.0 0.0 0.0 0.0

1630 0.0 0.0 0.0 4.1 24.5 34.3 24.5 9.8 2.9 0.0 0.0 0.0 0.0 0.0

1700 0.0 0.0 0.4 3.3 26.1 33.9 24.5 9.4 2.4 0.0 0.0 0.0 0.0 0.0

1730 0.0 0.0 0.0 4.6 25.7 35.3 24.1 8.7 1.7 0.0 0.0 0.0 0.0 0.0

1800 0.0 0.0 0.4 4.1 27.5 33.2 25.0 7.8 2.0 0.0 0.0 0.0 0.0 0.0

1830 0.0 0.0 0.0 5.3 26.3 34.8 22.7 9.7 1.2 0.0 0.0 0.0 0.0 0.0

1900 0.0 0.0 0.0 4.9 26.2 34.4 25.0 8.6 0.8 0.0 0.0 0.0 0.0 0.0

1930 0.0 0.0 0.4 4.9 26.4 32.5 25.2 9.3 1.2 0.0 0.0 0.0 0.0 0.0

2000 0.0 0.0 0.0 5.3 28.3 32.4 23.8 9.0 1.2 0.0 0.0 0.0 0.0 0.0

2030 0.0 0.0 0.0 5.8 27.6 33.3 23.0 9.5 0.8 0.0 0.0 0.0 0.0 0.0

2100 0.0 0.0 0.4 6.1 29.7 31.3 23.6 7.3 1.6 0.0 0.0 0.0 0.0 0.0

2130 0.0 0.0 0.4 6.6 28.7 32.4 22.5 7.8 1.6 0.0 0.0 0.0 0.0 0.0

2200 0.0 0.0 0.8 6.1 29.8 33.1 21.6 7.8 0.8 0.0 0.0 0.0 0.0 0.0

2230 0.0 0.0 0.8 6.5 29.3 32.9 22.0 7.7 0.8 0.0 0.0 0.0 0.0 0.0

2300 0.0 0.0 0.4 7.0 29.9 33.6 21.3 7.0 0.8 0.0 0.0 0.0 0.0 0.0

2330 0.0 0.0 0.8 6.6 30.7 32.8 20.9 7.4 0.8 0.0 0.0 0.0 0.0 0.0

MEAN 0.0 0.1 0.4 5.2 26.9 31.5 24.1 9.3 2.6 0.0 0.0 0.0 0.0 0.0

REMARKS

TEMPERATURETIME

(UTC)

MODEL E









2.2 Humidity

2.2.1 Relative humidity

Relative humidity as the saturation degree of air with water vapor is an important climatological parameter. It indicates the proportion of the current water vapor and the maximum water vapor content that air could contain at the same temperature. The relative air humidity depends on the air temperature as well as on the water vapor content in it. Relative humidity is calculated from the available parameters contained in METAR reports, air temperature and dew point temperature. Table 15 shows mean relative humidity, absolute minimum and the number of days when relative humidity was ≤30 %, ≤50 % and ≥80 % at 1400 UTC. Most values indicate that the relative humidity decreases from winter towards summer months, and then again increases from summer to winter. Minor rise of the relative humidity was recorded in May and June, as those are the months marked by highest precipitation sums. Mean monthly relative humidity ranges between 62% (July and August) and 85% (December), while the average annual value is 71%.

Table 15. Average monthly and annual relative humidity, absolute minimum of relative humidity, average number of days within specified values of relative humidity

Mean monthly and

yearly relative humidity84 79 67 63 67 67 62 62 66 73 78 85 71

Absolute minimum of

relative humidity37 19 13 16 18 18 7 15 15 21 22 42 7


with relative humidity

≤ 30 %

0 0.1 1.1 1.7 0.8 0.8 2.2 2.9 1.4 0.3 0 0 11.4



≤ 50 %

0.3 1.6 7.0 9.0 7.2 7.4 10.5 10.3 8.4 4.3 1.6 0.5 68.0



≥ 80 % at 1400 UTC

0.6 0.4 0.2 0.1 0.1 0.1 0 0.1 0.1 0.2 0.3 0.7 2.9

When temperatures are higher, values of the relative humidity are lower, hence the absolute minimum of 7% was registered on July 24, 2007, when most meteorological stations in Serbia observed the highest air temperature on record since the measurements began. The average number of days with humidity above 80% at 1400 UTC is very low, 2.9 days on average. Average relative humidity is shown in Table 16. Minimum relative humidity follows the daily maximum temperature (1300 UTC). Mean relative humidity above 80% occurs throughout the entire year, during night and early morning hours, apart from April, when relative humidity is 79 % at 0300 – 0500 UTC.




2.2.2 Difference between dew point temperature (Td) and air temperature (T)

In aviation, the difference between temperature (T) and dew point temperature (Td) is used more frequently as a unit for air humidity, as a parameter indicating air humidity independently of its temperature. The smaller the difference between T and Td, the air is more saturated with water vapor. The difference T-Td=0 ͦС shows that the atmosphere is saturated with the water vapor or is very close to saturation point. These values are recorded in cases when there are either fog or it is raining at the aerodrome. Most of these cases occur in January and December between 0230 – 0400 UTC, as shown in Table 17. The same intervals in those months have fewest cases of Т-Тd>4 Сͦ as shown in Figure 22. That is the case when air is driest and when fog and rainfall are non-existent.

Tables 17 – 22 show the average number of intervals when the difference between air temperature (T) and dew point temperature (Td) equals 0, 1, 2, 3, 4 and surpasses 4 ͦС. The difference between these temperatures is an integer.




Table 16. Average relative humidity (%)

Month/

Time (UTC)VI VII VIII IX X XI XII I II III IV V VI Year

1300 48.6 43.0 43.4 46.8 54.6 62.7 76.9 75.9 69.5 52.6 46.8 49.6 48.6 55.8

1330 48.8 42.7 43.0 46.6 54.9 63.7 77.4 75.8 69.1 52.9 46.6 49.3 48.8 55.8

1400 48.3 42.7 43.1 46.2 55.1 64.6 78.4 76.7 69.4 52.9 46.3 49.9 48.3 56.1

1430 49.0 42.5 42.9 47.2 56.0 67.1 79.4 78.0 69.8 52.7 47.2 49.9 49.0 56.7

1500 49.2 42.9 43.1 47.9 57.6 69.1 81.1 79.2 71.3 53.6 48.0 50.9 49.2 57.8

1530 50.0 43.3 44.0 49.4 59.8 71.3 82.2 81.1 72.4 55.2 48.1 51.1 50.0 58.9

1600 51.3 44.2 44.7 51.5 62.7 73.5 83.1 82.4 74.2 57.1 49.9 52.6 51.3 60.5

1630 53.6 46.5 46.9 54.7 65.7 74.7 83.7 82.9 76.2 60.3 52.0 55.1 53.6 62.6

1700 55.6 48.5 49.7 58.2 67.9 75.8 84.4 83.4 77.4 62.3 54.5 57.2 55.6 64.5

1730 58.2 51.7 52.8 60.7 69.9 76.8 84.4 84.1 78.3 64.5 57.1 60.0 58.2 66.5

1800 61.8 54.9 55.4 63.1 71.0 78.0 84.6 84.6 79.4 65.6 59.0 62.6 61.8 68.2

1830 65.0 58.0 58.1 65.0 72.8 78.4 84.8 85.0 79.8 67.0 60.5 65.1 65.0 69.9

1900 67.0 60.4 60.1 65.9 73.6 79.5 84.8 84.9 80.1 67.6 61.6 66.9 67.0 71.0

1930 68.9 62.6 62.4 67.7 74.3 79.5 84.7 85.0 80.1 68.5 63.3 68.8 68.9 72.1

2000 71.1 64.5 64.1 68.4 75.7 79.7 85.2 84.9 80.6 69.7 64.8 70.5 71.1 73.2

2030 72.5 66.7 66.0 70.0 76.7 80.4 85.5 85.3 81.1 70.7 66.2 71.8 72.5 74.4

2100 73.8 68.2 67.6 71.1 77.7 80.7 85.8 85.8 81.6 71.2 67.8 73.4 73.8 75.4

2130 74.9 70.4 69.1 72.2 78.8 81.3 86.0 85.9 81.5 72.0 69.0 74.4 74.9 76.3

2200 76.2 71.4 70.2 73.8 79.9 82.2 86.6 86.0 81.9 73.4 70.0 75.9 76.2 77.3

2230 77.4 72.6 71.8 74.8 80.5 82.4 86.7 86.1 81.9 73.4 70.8 77.0 77.4 77.9

2300 78.1 73.6 73.2 76.0 81.4 82.5 87.0 86.0 82.2 74.5 72.2 78.0 78.1 78.7

2330 78.9 75.0 74.1 76.7 81.6 83.3 87.0 86.7 82.9 74.7 73.2 78.7 78.9 79.4

0000 80.4 76.4 75.7 77.5 82.9 83.5 87.3 87.2 83.1 75.2 73.8 79.7 80.4 80.2

0030 81.7 77.7 77.3 79.1 83.3 83.9 87.2 87.3 84.1 75.8 75.1 80.8 81.7 81.1

0100 82.3 79.1 78.6 79.6 83.9 83.7 87.3 88.0 84.4 76.7 75.9 81.8 82.3 81.8

0130 83.4 80.5 79.5 80.4 84.5 84.4 87.8 87.5 84.6 77.2 77.6 82.3 83.4 82.5

0200 84.6 81.4 80.5 81.8 85.0 84.9 88.2 87.8 84.8 77.9 77.6 83.5 84.6 83.2

0230 85.8 81.9 81.6 82.1 85.7 85.4 87.8 87.6 84.9 78.4 78.2 84.3 85.8 83.7

0300 86.1 82.7 82.1 82.8 86.2 85.8 88.2 88.3 85.1 78.7 78.7 84.6 86.1 84.1

0330 86.2 83.5 83.1 83.2 86.6 86.0 88.2 88.7 84.9 79.0 78.8 84.6 86.2 84.4

0400 85.8 82.6 82.9 83.5 86.7 86.4 88.2 88.9 85.1 79.4 79.4 85.3 85.8 84.5

0430 83.3 80.4 82.7 83.9 86.5 85.9 88.1 88.6 85.3 79.6 79.1 83.3 83.3 83.9

0500 80.7 77.8 80.7 83.7 86.8 86.0 88.3 88.6 85.2 80.1 79.3 81.1 80.7 83.2

0530 77.3 73.7 77.5 82.5 86.8 86.4 87.8 88.5 85.3 80.3 78.1 78.4 77.3 81.9

0600 74.1 70.1 74.1 79.5 86.2 86.1 87.6 88.6 85.1 79.1 76.0 75.6 74.1 80.2

0630 70.9 66.4 69.6 75.3 84.4 85.4 87.8 88.5 85.2 76.9 72.5 72.3 70.9 77.9

0700 67.8 62.8 65.6 71.5 81.6 84.5 87.5 89.0 84.2 74.6 69.0 69.6 67.8 75.6

0730 65.2 59.8 62.2 67.8 78.3 82.4 86.8 87.6 83.0 71.4 66.3 66.5 65.2 73.0

0800 62.6 57.1 58.7 64.3 75.0 80.3 86.2 86.5 81.7 67.9 63.5 63.8 62.6 70.6

0830 60.1 54.7 56.3 61.0 71.7 77.8 84.9 85.0 80.9 65.4 60.6 61.4 60.1 68.2

0900 57.7 52.5 53.2 58.0 68.3 75.6 83.7 84.1 79.5 62.3 56.8 58.4 57.7 65.8

0930 55.5 50.3 51.8 55.4 65.2 73.0 82.2 82.6 77.5 60.6 55.2 56.8 55.5 63.8

1000 53.9 48.2 49.4 52.9 62.7 70.4 81.1 81.0 75.9 58.9 53.2 55.1 53.9 61.8

1030 52.2 47.0 48.0 51.3 60.6 68.3 79.5 79.8 74.7 56.5 51.5 53.7 52.2 60.2

1100 50.9 46.1 46.3 49.9 58.7 66.7 78.6 78.8 73.0 54.9 50.0 52.4 50.9 58.8

1130 50.1 45.1 45.8 48.5 57.1 64.6 77.8 77.3 72.1 53.4 49.3 51.5 50.1 57.6

1200 49.6 44.1 44.4 48.0 56.1 63.3 76.9 76.6 71.3 53.2 47.9 50.8 49.6 56.8

1230 48.8 43.4 43.8 46.9 55.4 62.9 76.9 75.8 70.1 52.7 47.3 50.3 48.8 56.1

1300 48.6 43.0 43.4 46.8 54.6 62.7 76.9 75.9 69.5 52.6 46.8 49.6 48.6 55.8

MEAN 66.6 61.5 62.0 65.9 73.2 77.7 84.4 84.2 79.4 67.5 63.5 67.0 66.6 71




Table 17. Average number of cases when Т-Тd=0

Month/


1300 0.3 0.0 0.1 0.1 0.4 0.9 2.5 4.5 0.9 0.5 0.4 0.1 0.3 10.6

1330 0.0 0.1 0.3 0.0 0.9 1.1 3.4 5.1 1.3 1.0 0.4 0.1 0.0 13.6

1400 0.3 0.0 0.3 0.1 0.6 1.3 3.8 5.1 1.5 0.6 0.5 0.1 0.3 14.1

1430 0.4 0.0 0.1 0.0 0.8 1.1 4.0 5.4 2.0 0.5 0.6 0.1 0.4 15.0

1500 0.1 0.0 0.0 0.0 0.9 0.9 3.1 4.3 2.1 0.5 0.5 0.1 0.1 12.5

1530 0.1 0.1 0.1 0.1 0.8 1.4 3.9 4.1 1.8 1.1 0.3 0.3 0.1 14.0

1600 0.1 0.1 0.0 0.1 1.0 1.9 3.9 4.6 2.4 1.3 0.5 0.3 0.1 16.1

1630 0.3 0.1 0.1 0.3 1.1 1.8 4.5 4.5 2.9 1.3 0.4 0.3 0.3 17.4

1700 0.0 0.1 0.1 0.4 1.5 1.9 5.0 5.8 3.0 1.3 0.5 0.0 0.0 19.5

1730 0.4 0.0 0.4 0.1 1.5 2.0 4.1 6.8 2.6 1.6 1.0 0.1 0.4 20.6

1800 0.8 0.0 0.5 0.3 1.5 1.5 4.8 7.5 3.3 1.3 0.8 0.3 0.8 22.3

1830 0.5 0.0 0.8 0.6 1.8 2.0 4.8 7.5 2.8 1.5 0.5 0.4 0.5 23.0

1900 0.5 0.3 0.6 0.8 1.5 2.9 5.6 7.5 2.9 1.5 0.9 0.3 0.5 25.1

1930 0.4 0.3 0.5 1.0 1.6 2.8 5.4 6.4 2.8 1.8 1.4 0.3 0.4 24.4

2000 0.5 0.4 0.6 1.3 1.5 2.1 5.3 6.8 3.1 2.1 1.0 0.8 0.5 25.4

2030 0.9 0.5 0.8 0.5 1.6 2.8 5.5 6.0 3.1 2.0 1.1 0.8 0.9 25.5

2100 0.8 0.5 1.1 0.4 1.5 2.5 6.1 6.6 3.1 1.8 1.6 1.0 0.8 27.0

2130 1.3 0.5 0.6 0.6 2.4 2.8 6.1 6.8 3.3 2.1 1.3 1.3 1.3 28.9

2200 0.9 0.6 0.8 0.5 2.5 2.8 6.8 6.5 3.9 2.6 1.3 1.1 0.9 30.1

2230 1.4 0.8 1.5 1.3 2.5 3.4 6.3 6.5 3.1 2.4 1.6 1.3 1.4 31.9

2300 1.1 0.8 1.5 1.4 2.6 2.4 6.0 5.9 3.6 2.5 2.3 1.6 1.1 31.6

2330 0.9 0.8 1.1 1.4 2.8 3.1 6.5 7.4 3.5 3.0 1.9 1.8 0.9 34.0

0000 1.5 1.5 1.4 1.1 3.1 3.4 7.1 7.4 4.1 3.4 1.3 1.9 1.5 37.1

0030 2.1 1.3 1.5 1.8 3.3 3.0 7.3 6.8 4.8 2.9 2.0 2.4 2.1 38.9

0100 2.3 1.5 2.3 1.3 3.3 3.0 7.1 8.0 4.8 3.3 1.9 2.3 2.3 40.8

0130 3.0 1.9 2.0 1.4 3.9 3.6 6.9 6.6 4.8 3.3 2.0 3.0 3.0 42.3

0200 2.6 1.6 2.0 2.0 3.1 4.1 8.0 7.6 4.5 3.9 2.9 2.8 2.6 45.1

0230 3.3 2.0 1.8 2.0 4.4 4.8 7.3 8.0 4.5 4.8 2.9 2.0 3.3 47.5

0300 2.3 2.6 2.5 2.6 4.5 5.1 8.4 7.3 5.3 4.3 3.4 2.3 2.3 50.4

0330 2.5 3.4 3.0 3.4 4.5 4.4 8.0 8.4 4.3 3.6 2.8 2.6 2.5 50.8

0400 2.1 2.0 2.5 3.4 5.4 4.6 7.4 8.5 5.1 3.8 3.8 2.4 2.1 50.9

0430 2.4 1.8 2.5 2.6 5.9 4.5 7.4 8.1 4.6 3.6 2.9 2.6 2.4 48.9

0500 1.6 1.8 2.1 2.9 4.5 5.3 7.5 8.3 4.4 3.6 3.0 1.8 1.6 46.6

0530 1.3 0.8 2.1 3.1 5.0 5.3 7.0 7.8 4.4 4.1 2.6 1.3 1.3 44.6

0600 1.3 0.6 1.4 2.6 5.0 4.8 6.6 7.4 3.5 3.9 2.5 0.9 1.3 40.4

0630 0.5 0.5 0.5 1.6 4.1 4.6 6.8 6.9 3.8 3.4 2.3 0.3 0.5 35.1

0700 0.8 0.0 0.6 1.1 3.5 4.4 7.1 8.6 4.1 3.0 2.0 0.6 0.8 35.9

0730 0.8 0.4 0.9 0.9 2.8 3.5 6.8 6.9 3.6 2.3 1.0 0.5 0.8 30.1

0800 0.5 0.0 0.6 0.9 2.3 2.6 7.9 7.5 3.5 1.6 1.1 0.5 0.5 29.0

0830 0.5 0.0 0.4 0.6 1.1 2.5 6.3 5.4 3.8 1.6 0.9 0.4 0.5 23.4

0900 0.5 0.0 0.6 0.4 1.1 2.9 7.0 7.0 3.5 0.9 0.1 0.4 0.5 24.4

0930 0.1 0.0 0.5 0.5 0.6 1.8 5.1 6.5 3.0 0.9 0.5 0.3 0.1 19.8

1000 0.1 0.0 0.1 0.1 0.6 1.5 5.1 5.8 2.8 0.9 0.3 0.4 0.1 17.6

1030 0.3 0.0 0.0 0.3 1.0 1.8 4.0 5.4 2.9 1.1 0.4 0.0 0.3 17.0

1100 0.3 0.0 0.0 0.1 0.6 1.5 3.9 5.8 2.3 0.9 0.4 0.0 0.3 15.6

1130 0.1 0.0 0.1 0.3 0.6 0.8 3.6 5.0 2.0 0.8 0.6 0.1 0.1 14.0

1200 0.3 0.0 0.0 0.3 0.4 0.6 3.4 4.9 2.0 0.8 0.4 0.4 0.3 13.3

1230 0.1 0.0 0.1 0.3 0.4 1.0 3.6 4.3 1.6 0.5 0.5 0.1 0.1 12.5

1300 0.3 0.0 0.1 0.1 0.4 0.9 2.5 4.5 0.9 0.5 0.4 0.1 0.3 10.6

MEAN 0.9 0.6 0.9 1.0 2.3 2.7 5.7 6.5 3.3 2.1 1.4 0.9 0.9 28.2

Remarks Cases when a certa in phenomenon is not occurred and frequency i s 0 are shaded white





Month/


1300 1.0 0.1 0.5 0.9 1.6 2.8 5.6 5.0 4.1 1.3 0.9 0.6 1.0 24.4

1330 1.3 0.3 0.5 1.0 1.8 2.6 5.1 4.0 3.0 1.1 0.6 0.1 1.3 21.4

1400 0.9 0.3 0.6 0.4 1.8 2.5 5.3 3.6 2.8 1.4 0.6 0.3 0.9 20.3

1430 0.6 0.1 0.5 1.0 2.1 2.9 4.9 4.1 2.6 1.5 0.6 0.3 0.6 21.3

1500 1.1 0.1 0.6 1.1 2.0 3.0 6.9 4.9 3.8 1.6 0.5 0.6 1.1 26.3

1530 1.1 0.3 0.9 1.0 2.4 3.0 6.8 6.3 3.9 1.5 1.3 0.5 1.1 28.8

1600 1.6 0.3 1.0 1.0 2.6 2.6 8.1 6.6 3.6 1.6 1.0 0.6 1.6 30.8

1630 1.5 0.5 1.1 1.4 2.6 3.1 7.6 7.4 3.5 2.0 1.4 1.1 1.5 33.3

1700 1.9 0.6 1.1 1.9 2.5 3.3 8.9 6.4 3.8 2.8 1.6 1.3 1.9 35.9

1730 1.1 1.3 1.1 2.5 3.3 3.6 9.0 6.1 4.1 2.6 1.4 1.9 1.1 38.0

1800 1.0 1.0 1.1 2.6 3.3 4.8 8.9 5.9 4.4 2.9 1.8 2.0 1.0 39.5

1830 2.1 1.4 1.0 2.4 2.9 4.5 10.1 6.8 6.1 2.8 1.9 2.8 2.1 44.6

1900 2.1 1.5 1.8 2.4 3.8 4.1 8.5 7.1 5.9 3.4 2.1 3.4 2.1 46.0

1930 3.9 1.6 2.1 2.4 3.3 4.9 9.0 8.3 6.4 3.5 1.9 4.0 3.9 51.1

2000 4.0 1.9 2.4 2.0 4.3 5.8 10.3 6.6 6.4 3.3 2.6 3.6 4.0 53.0

2030 3.5 2.3 2.5 3.3 3.5 5.1 9.5 8.1 6.9 3.8 2.9 3.9 3.5 55.1

2100 3.6 3.1 2.6 3.6 4.9 5.5 9.9 7.4 7.5 4.6 2.6 4.0 3.6 59.4

2130 3.5 4.0 3.5 3.6 4.5 5.3 9.9 7.3 7.6 3.8 3.6 4.0 3.5 60.5

2200 4.6 3.6 4.1 4.9 4.4 6.3 9.4 8.8 7.0 4.3 4.0 4.3 4.6 65.5

2230 4.1 4.0 4.0 4.0 4.9 6.0 10.1 8.3 7.6 4.1 4.0 4.9 4.1 66.0

2300 5.1 4.0 4.6 4.9 5.9 7.9 10.9 9.0 7.0 4.9 4.0 4.8 5.1 72.9

2330 6.8 4.3 4.4 5.1 5.9 7.4 11.0 7.9 7.8 4.6 4.4 4.8 6.8 74.1

0000 7.0 4.6 4.4 5.8 6.6 7.8 9.6 7.8 6.4 4.4 5.5 5.3 7.0 75.0

0030 6.9 5.3 5.5 5.9 7.3 8.5 10.1 7.9 6.4 5.6 5.3 6.0 6.9 80.5

0100 6.9 5.8 5.4 6.6 7.8 8.3 9.8 8.0 7.1 5.4 5.5 6.6 6.9 83.0

0130 7.3 6.0 5.9 7.6 7.9 8.4 10.6 9.4 7.0 5.1 6.3 5.3 7.3 86.6

0200 9.0 8.3 6.3 8.0 8.6 8.6 10.1 8.5 7.6 4.9 5.8 7.5 9.0 93.1

0230 9.1 7.4 8.5 8.1 8.9 8.9 10.1 7.4 8.0 4.1 6.0 9.1 9.1 95.6

0300 10.4 6.8 6.9 8.3 9.0 9.1 9.8 9.5 7.1 5.1 5.3 8.3 10.4 95.4

0330 10.5 7.9 7.8 7.3 9.3 10.1 10.4 8.3 8.1 6.1 6.3 8.3 10.5 100.1

0400 9.8 8.4 7.6 7.3 7.5 9.5 11.0 8.9 6.9 6.5 5.3 8.4 9.8 96.9

0430 6.0 5.6 7.3 8.8 8.4 9.6 10.6 9.1 7.6 6.4 6.0 5.4 6.0 90.8

0500 5.4 4.3 5.6 8.5 10.3 9.4 11.1 8.9 8.0 6.6 5.6 5.1 5.4 88.8

0530 3.5 2.8 4.3 6.6 8.8 9.0 9.9 8.9 7.8 6.3 5.3 3.0 3.5 75.9

0600 2.8 1.6 3.9 5.5 7.9 9.4 11.6 9.9 8.5 6.0 3.3 2.9 2.8 73.1

0630 3.0 1.4 2.9 4.4 7.4 9.1 11.5 10.1 8.4 4.5 2.5 2.6 3.0 67.8

0700 2.1 1.0 2.4 3.4 6.0 8.9 10.5 9.3 7.0 3.8 1.6 1.9 2.1 57.8

0730 1.8 0.5 1.8 2.5 4.4 7.4 10.3 9.3 7.4 3.6 2.4 1.1 1.8 52.3

0800 1.8 0.8 1.1 2.0 4.1 6.6 7.4 7.4 6.0 2.1 1.6 1.0 1.8 41.9

0830 1.4 0.5 1.5 2.5 4.4 4.4 8.0 8.3 5.0 1.8 1.3 1.0 1.4 39.9

0900 1.0 0.5 0.6 1.8 3.1 3.3 6.1 5.4 4.5 2.4 1.1 0.8 1.0 30.5

0930 1.1 0.4 1.1 1.3 2.9 3.6 7.8 5.1 4.8 2.1 1.1 0.8 1.1 32.0

1000 1.3 0.3 1.1 1.1 2.8 3.8 6.9 4.4 3.9 2.3 1.6 0.8 1.3 30.0

1030 0.8 0.1 0.8 1.1 1.4 2.4 6.3 4.1 3.1 1.1 1.0 1.1 0.8 23.3

1100 1.1 0.5 0.8 1.3 1.8 2.5 5.8 3.4 3.0 1.3 1.1 1.1 1.1 23.5

1130 1.5 0.6 0.8 1.1 1.8 2.9 5.9 4.1 3.8 1.3 0.8 0.8 1.5 25.1

1200 1.0 0.3 0.4 1.4 2.3 2.6 5.6 4.4 3.6 1.1 0.8 0.9 1.0 24.3

1230 1.4 0.3 0.6 0.9 2.4 2.5 5.0 4.5 3.5 1.3 0.4 0.5 1.4 23.1

1300 1.0 0.1 0.5 0.9 1.6 2.8 5.6 5.0 4.1 1.3 0.9 0.6 1.0 24.4

MEAN 3.5 2.5 2.9 3.6 4.7 5.7 8.7 7.0 5.8 3.4 2.8 3.1 3.5 53.6






Month/


1300 1.1 0.4 0.8 1.5 2.0 0.9 4.9 2.1 3.1 1.0 0.6 0.8 1.1 19.1

1330 1.3 0.4 0.6 1.6 1.5 0.9 4.0 2.4 3.3 0.9 1.0 1.1 1.3 18.9

1400 1.1 0.4 0.5 1.4 1.5 0.9 4.1 2.8 3.8 1.3 1.3 1.1 1.1 20.0

1430 1.1 0.5 0.6 1.1 1.3 1.4 4.5 2.9 3.1 1.1 1.3 1.6 1.1 20.5

1500 0.9 0.9 0.9 1.3 1.6 2.0 5.3 4.0 2.4 1.3 1.6 1.1 0.9 23.1

1530 0.9 0.6 0.4 1.5 1.5 2.1 5.4 4.0 2.8 1.3 0.6 1.6 0.9 22.6

1600 0.8 0.5 0.6 1.5 1.3 2.8 5.6 4.9 3.8 1.4 0.5 1.6 0.8 25.1

1630 0.9 1.0 0.5 1.6 1.8 3.5 5.4 4.4 4.5 1.9 0.8 1.9 0.9 28.0

1700 0.8 1.0 0.6 1.3 2.1 3.8 4.4 4.4 4.6 1.4 0.5 1.5 0.8 26.3

1730 1.3 0.6 0.9 1.6 1.5 3.9 5.6 4.3 5.3 1.9 1.4 1.8 1.3 29.9

1800 1.8 1.4 1.4 2.0 1.4 5.0 5.9 3.5 4.6 2.4 1.8 2.3 1.8 33.3

1830 2.6 1.9 2.1 2.0 2.6 5.0 4.5 3.6 5.0 3.1 2.5 2.5 2.6 37.5

1900 2.6 1.8 1.6 2.6 2.6 4.6 5.1 3.0 5.5 2.3 1.9 2.8 2.6 36.4

1930 2.3 2.5 2.1 2.6 3.0 4.5 5.1 3.9 4.8 2.8 2.1 2.5 2.3 38.1

2000 2.8 2.3 2.5 3.1 2.5 5.1 4.5 4.4 4.6 3.4 1.9 2.6 2.8 39.6

2030 3.9 2.6 2.4 2.6 4.0 6.3 5.6 4.6 4.6 4.0 2.3 3.1 3.9 46.0

2100 4.1 2.8 2.9 3.3 4.0 5.5 4.4 5.0 4.1 3.0 2.6 3.5 4.1 45.1

2130 4.4 2.1 3.1 4.3 3.8 6.6 5.0 5.8 3.3 3.1 2.5 3.5 4.4 47.4

2200 4.3 2.9 3.4 4.0 5.3 6.9 5.3 4.4 3.8 3.0 2.3 4.0 4.3 49.3

2230 4.9 2.6 3.6 5.5 5.9 6.4 5.5 4.4 3.4 3.3 2.4 4.0 4.9 51.8

2300 4.1 3.8 3.5 5.0 5.6 5.1 5.4 5.0 3.8 2.6 2.8 4.9 4.1 51.5

2330 3.8 4.0 4.1 5.1 5.4 6.6 4.1 4.8 4.5 3.5 3.1 4.9 3.8 53.9

0000 4.5 4.3 4.9 4.9 5.3 5.3 5.3 5.4 5.1 3.3 2.8 4.9 4.5 55.6

0030 5.1 5.6 5.1 5.4 5.3 6.1 4.4 6.3 5.3 2.9 2.9 4.1 5.1 58.4

0100 5.6 5.4 5.5 5.6 5.9 6.5 4.5 6.3 5.8 3.5 3.4 5.0 5.6 62.9

0130 5.4 5.9 5.4 5.6 4.5 6.0 4.8 5.3 5.6 3.5 3.1 6.1 5.4 61.1

0200 4.9 4.5 6.5 5.6 6.3 6.4 4.8 4.6 5.6 3.8 2.6 5.6 4.9 61.1

0230 6.1 5.8 4.9 5.9 5.3 5.5 5.1 5.3 5.3 3.8 3.4 6.0 6.1 62.1

0300 6.6 6.4 6.4 5.5 5.6 4.8 4.1 6.1 5.0 3.8 4.5 6.5 6.6 65.3

0330 6.6 5.0 5.5 5.8 6.8 5.8 4.3 6.1 4.1 4.6 3.5 6.4 6.6 64.4

0400 7.3 5.8 6.8 6.0 8.3 6.4 4.6 5.1 5.4 4.1 4.0 8.4 7.3 72.0

0430 6.8 5.8 6.4 6.4 6.0 5.1 5.0 4.6 5.5 4.9 3.6 8.5 6.8 68.5

0500 5.3 4.5 5.8 6.3 5.8 5.4 4.8 5.8 5.5 4.8 4.6 6.3 5.3 64.5

0530 4.8 4.0 4.3 5.9 6.3 5.4 6.8 5.5 6.8 4.3 4.6 5.9 4.8 64.3

0600 3.1 3.3 3.3 4.5 6.6 6.0 4.6 5.1 5.1 3.1 4.1 3.5 3.1 52.4

0630 2.5 2.4 3.4 3.8 4.8 4.9 4.6 4.4 5.9 3.3 3.3 3.3 2.5 46.3

0700 1.8 1.9 1.9 3.3 4.8 4.0 4.9 4.9 5.6 4.1 2.5 2.3 1.8 41.8

0730 1.6 1.4 1.4 2.5 4.1 4.0 4.8 4.8 4.8 2.3 1.9 2.3 1.6 35.6

0800 1.1 1.1 1.3 1.4 3.4 3.6 5.5 4.9 5.6 2.8 1.8 1.8 1.1 34.1

0830 1.1 0.8 0.8 0.9 2.1 4.3 5.8 5.0 5.6 2.5 1.1 1.3 1.1 31.1

0900 1.0 0.6 1.0 1.4 2.4 3.3 4.9 4.5 5.0 2.0 1.1 1.0 1.0 28.1

0930 1.0 0.8 0.5 1.1 2.1 3.0 4.4 3.4 4.4 1.8 1.0 1.3 1.0 24.6

1000 0.8 0.4 0.5 1.1 1.4 2.0 4.4 4.6 4.9 0.9 0.9 0.8 0.8 22.5

1030 1.0 0.8 1.1 1.1 2.0 2.3 4.1 4.5 4.6 1.0 1.4 1.3 1.0 25.1

1100 0.5 0.5 0.4 1.1 1.8 2.0 4.1 4.1 4.3 1.4 1.0 1.1 0.5 22.3

1130 0.4 0.1 0.1 0.8 2.0 1.9 3.4 3.1 3.8 1.3 1.3 1.1 0.4 19.1

1200 0.6 0.4 0.6 0.4 1.6 1.3 3.4 3.0 3.5 1.3 1.3 1.0 0.6 18.3

1230 0.8 0.4 0.5 1.1 1.3 1.3 3.9 3.0 3.1 1.1 1.3 1.0 0.8 18.6

1300 1.1 0.4 0.8 1.5 2.0 0.9 4.9 2.1 3.1 1.0 0.6 0.8 1.1 19.1

MEAN 2.9 2.4 2.6 3.1 3.6 4.2 4.8 4.5 4.6 2.6 2.2 3.2 2.9 40.5






Month/


1300 0.0 0.6 0.5 0.3 1.3 1.0 2.9 2.3 3.0 2.1 1.4 1.4 0.0 16.6

1330 0.6 0.4 0.1 0.4 1.0 1.5 3.5 2.6 2.8 1.6 1.4 1.4 0.6 17.3

1400 0.6 0.5 0.5 0.9 1.4 2.1 3.4 2.9 3.3 1.4 0.3 1.4 0.6 18.5

1430 1.0 0.5 0.6 1.0 1.1 2.0 4.5 2.6 3.6 1.4 0.5 0.9 1.0 19.8

1500 1.0 0.4 0.6 1.1 1.3 1.9 4.3 3.4 3.9 1.5 0.8 1.5 1.0 21.5

1530 0.9 0.4 0.6 0.6 1.3 3.1 4.4 3.6 3.5 1.5 0.8 0.8 0.9 21.4

1600 0.9 0.6 0.5 1.3 1.3 4.4 3.9 3.0 3.4 1.9 1.5 0.9 0.9 23.4

1630 1.0 0.8 0.5 1.5 1.1 3.0 4.8 3.3 2.6 2.0 1.6 1.1 1.0 23.3

1700 1.1 0.6 1.5 2.1 1.3 3.6 4.8 2.6 3.5 2.4 2.1 1.6 1.1 27.3

1730 1.9 1.1 1.4 1.5 2.4 3.1 3.4 3.5 4.0 2.1 1.3 1.8 1.9 27.4

1800 2.3 1.1 1.4 1.3 3.0 4.3 3.3 3.1 4.0 3.1 1.6 2.0 2.3 30.4

1830 2.0 1.5 1.1 2.5 3.4 4.1 3.1 2.6 3.8 3.0 1.3 1.9 2.0 30.3

1900 2.8 1.5 2.1 1.9 2.8 4.9 2.6 2.9 3.4 2.9 1.8 1.6 2.8 31.0

1930 2.1 1.4 2.3 2.6 3.3 5.1 2.8 2.5 3.3 2.8 1.5 2.1 2.1 31.6

2000 2.3 1.8 2.0 2.1 4.0 4.1 2.8 3.4 2.9 3.0 2.8 3.0 2.3 34.0

2030 2.4 2.4 2.1 3.4 5.3 4.3 2.3 2.9 3.3 2.5 2.5 2.6 2.4 35.8

2100 2.6 1.5 2.3 3.0 4.5 5.9 3.0 3.6 3.3 3.1 2.3 2.9 2.6 37.9

2130 3.0 2.4 2.9 3.3 5.3 5.3 2.1 3.1 4.0 3.6 2.1 3.1 3.0 40.1

2200 3.6 2.5 2.5 3.6 5.1 4.5 2.5 3.9 3.9 2.9 2.9 3.5 3.6 41.4

2230 3.4 4.0 2.5 2.6 5.0 5.0 2.5 4.4 4.8 3.0 2.5 3.6 3.4 43.3

2300 3.8 3.5 2.9 3.4 4.6 5.1 1.6 3.6 4.1 4.3 3.3 4.1 3.8 44.3

2330 3.8 4.4 3.9 3.1 4.6 4.8 2.0 3.6 3.6 2.8 2.6 4.3 3.8 43.4

0000 3.9 4.5 2.4 4.1 5.6 5.4 2.3 3.5 3.9 3.3 3.4 4.6 3.9 46.8

0030 4.3 3.5 2.6 4.5 4.8 4.0 2.1 3.4 4.0 3.0 3.0 5.4 4.3 44.5

0100 4.9 4.6 2.8 4.5 5.0 3.8 2.1 3.1 2.8 3.3 2.8 5.4 4.9 44.9

0130 4.4 3.9 3.9 3.5 5.8 3.9 2.0 3.8 3.8 4.0 3.1 4.8 4.4 46.6

0200 4.8 4.0 3.1 3.8 4.8 3.4 2.4 3.9 2.9 4.0 3.6 5.4 4.8 45.9

0230 4.0 4.4 3.8 3.8 4.8 3.1 2.5 3.8 3.0 4.5 2.9 4.5 4.0 44.9

0300 4.3 4.3 4.3 4.6 5.1 3.9 2.4 3.1 3.6 5.3 2.9 5.0 4.3 48.6

0330 3.9 4.4 4.9 4.5 3.6 2.9 2.8 3.5 4.0 3.4 3.1 4.5 3.9 45.4

0400 4.5 4.3 3.6 3.6 3.1 2.8 2.6 3.5 4.1 3.4 2.9 4.1 4.5 42.5

0430 4.9 5.1 4.4 3.5 3.8 4.4 2.6 4.1 4.3 3.8 3.9 4.5 4.9 49.1

0500 5.0 4.3 4.4 3.5 4.1 2.6 2.0 3.0 3.5 3.6 3.4 4.8 5.0 44.1

0530 5.0 4.0 3.9 4.3 4.3 3.6 1.3 4.4 2.9 4.9 3.6 5.6 5.0 47.6

0600 3.0 3.5 3.3 4.6 3.9 3.0 2.0 3.1 2.5 4.8 4.3 5.3 3.0 43.1

0630 2.1 2.1 2.8 3.6 5.1 3.3 2.0 4.1 3.1 4.4 3.3 2.4 2.1 38.3

0700 2.4 1.8 2.1 2.6 3.9 4.1 2.1 3.0 3.5 2.5 2.8 2.4 2.4 33.1

0730 1.8 1.3 1.5 2.0 4.0 4.6 2.8 4.1 3.5 3.8 2.5 2.4 1.8 34.1

0800 1.6 1.5 1.6 2.0 2.3 4.5 3.1 3.3 3.4 3.3 1.3 2.0 1.6 29.8

0830 0.8 1.6 1.3 1.3 3.3 3.8 2.6 2.9 3.6 2.0 2.5 2.4 0.8 27.9

0900 0.6 0.8 1.1 1.1 1.9 3.1 3.0 3.8 3.6 1.6 1.3 1.4 0.6 23.3

0930 0.4 0.8 1.0 0.9 1.5 2.8 3.3 4.3 3.3 1.9 0.8 1.4 0.4 22.0

1000 0.5 0.6 0.6 0.8 2.1 2.0 2.6 3.4 3.6 2.0 0.9 1.1 0.5 20.3

1030 0.4 0.5 0.6 0.5 2.0 2.3 4.3 2.1 2.8 2.1 0.5 0.9 0.4 18.9

1100 0.5 0.1 1.0 0.8 1.6 2.3 3.5 2.8 2.8 1.6 0.5 1.1 0.5 18.5

1130 0.3 0.3 0.6 0.8 0.9 1.4 3.5 2.0 3.0 1.3 0.5 1.5 0.3 15.9

1200 0.6 0.4 0.5 0.8 1.0 1.9 3.3 1.6 3.1 1.5 0.5 1.1 0.6 16.3

1230 0.0 0.4 0.6 0.4 1.0 1.5 3.5 1.9 2.8 1.8 1.1 1.6 0.0 16.5

1300 0.0 0.6 0.5 0.3 1.3 1.0 2.9 2.3 3.0 2.1 1.4 1.4 0.0 16.6

MEAN 2.3 2.1 2.0 2.4 3.2 3.5 2.9 3.2 3.4 2.8 2.1 2.8 2.3 32.7






Month/


1300 0.3 0.3 0.6 0.6 0.5 2.4 3.0 2.4 2.0 1.8 0.6 1.6 0.3 16.0

1330 0.3 0.3 0.8 0.3 0.9 2.5 3.3 1.8 3.0 2.0 0.4 0.9 0.3 16.1

1400 0.6 0.6 1.0 0.4 0.8 2.1 3.5 2.4 2.1 1.9 1.3 1.0 0.6 17.6

1430 0.6 0.5 0.9 0.3 0.9 2.5 3.3 2.5 1.8 1.8 1.1 1.3 0.6 17.3

1500 0.8 0.6 0.5 0.4 0.4 3.5 3.1 2.3 2.5 1.5 0.8 1.3 0.8 17.5

1530 0.6 0.6 0.8 1.3 0.9 3.3 3.0 2.4 3.1 1.5 1.3 1.3 0.6 19.9

1600 0.9 0.5 1.1 1.5 1.5 2.6 3.0 3.0 3.1 1.1 1.4 1.9 0.9 21.6

1630 1.4 0.6 1.5 0.8 2.5 4.1 2.6 2.5 4.5 1.6 0.8 1.4 1.4 24.3

1700 2.0 0.9 0.9 0.8 3.1 3.8 1.8 3.5 3.9 2.3 0.9 1.4 2.0 25.0

1730 0.9 1.0 1.1 1.3 3.1 4.9 3.1 2.6 3.3 2.8 1.4 1.6 0.9 27.0

1800 1.9 1.6 1.4 2.5 3.3 3.9 2.4 4.1 2.8 2.1 0.9 1.9 1.9 28.6

1830 1.5 1.5 2.1 2.1 2.3 3.8 3.0 2.9 3.0 2.3 1.9 1.6 1.5 27.9

1900 1.6 1.4 2.0 2.3 3.4 3.9 2.8 4.4 3.3 3.0 1.8 2.6 1.6 32.3

1930 1.8 1.6 1.9 2.3 4.5 3.0 2.8 4.0 3.4 3.0 2.4 2.5 1.8 33.0

2000 2.0 1.9 1.5 2.5 5.1 3.5 2.1 4.0 3.8 2.4 2.0 3.3 2.0 34.0

2030 1.9 1.8 3.0 2.8 4.1 2.5 1.8 4.4 2.8 2.0 1.9 3.1 1.9 31.9

2100 2.4 2.6 2.0 3.3 4.6 2.6 2.1 2.9 3.3 1.8 2.5 3.4 2.4 33.4

2130 2.5 3.6 2.4 3.1 4.5 2.4 1.8 2.3 2.8 2.3 2.4 3.5 2.5 33.4

2200 2.1 4.0 1.9 3.4 4.6 2.9 1.5 2.5 2.4 3.6 1.5 4.1 2.1 34.5

2230 3.4 3.3 2.4 3.8 3.3 2.4 1.5 2.0 2.3 2.9 2.4 3.6 3.4 33.0

2300 4.1 4.1 1.4 2.8 3.6 2.4 2.0 2.6 2.5 2.5 1.9 2.9 4.1 32.8

2330 3.9 4.1 1.5 3.3 4.4 2.4 2.1 3.3 2.4 2.8 2.5 4.1 3.9 36.6

0000 3.0 3.3 3.1 3.8 3.1 2.5 1.4 3.1 2.0 3.4 2.0 4.9 3.0 35.5

0030 3.9 3.6 3.3 3.3 4.0 2.9 1.8 2.6 1.9 3.8 2.9 3.8 3.9 37.5

0100 2.9 2.6 3.4 2.6 3.4 2.8 2.1 2.4 2.3 3.3 3.1 3.8 2.9 34.5

0130 3.5 3.8 3.1 3.1 4.1 2.5 1.5 2.9 1.8 4.3 3.1 5.0 3.5 38.6

0200 3.1 4.4 3.1 3.0 3.6 1.5 0.9 3.5 2.4 3.1 3.0 3.4 3.1 35.0

0230 3.3 3.4 3.1 3.6 3.4 2.3 1.4 3.1 2.3 3.3 2.9 3.8 3.3 35.6

0300 2.3 3.4 3.0 2.1 2.0 1.6 1.8 2.1 2.5 2.1 3.6 4.1 2.3 30.6

0330 2.6 3.3 2.0 2.3 3.0 2.0 1.4 1.8 2.4 2.5 4.5 4.5 2.6 32.1

0400 1.8 2.8 3.3 3.0 2.9 2.1 1.1 2.1 2.1 2.8 3.6 2.8 1.8 30.3

0430 3.9 3.5 2.0 2.5 2.4 1.8 1.4 2.4 1.8 2.4 3.6 3.4 3.9 30.9

0500 3.5 4.3 3.5 2.4 2.3 2.8 1.9 2.3 2.5 2.8 2.5 5.4 3.5 35.9

0530 3.8 3.9 4.4 2.9 2.6 2.0 1.9 1.8 1.6 2.4 3.1 4.6 3.8 34.9

0600 4.5 3.3 3.1 3.0 3.1 2.4 1.3 3.0 2.8 3.6 2.6 4.6 4.5 37.3

0630 3.9 2.8 2.1 3.5 4.1 3.1 1.8 2.1 2.8 3.6 3.8 5.1 3.9 38.6

0700 2.5 2.6 2.9 3.5 3.9 2.4 1.4 2.8 2.4 4.3 2.8 3.3 2.5 34.5

0730 2.1 2.3 2.4 3.3 4.3 3.8 1.6 2.3 2.5 2.8 2.4 2.8 2.1 32.3

0800 1.4 1.3 1.0 1.6 4.1 3.4 1.9 3.6 2.5 2.6 3.1 2.4 1.4 28.9

0830 1.5 1.1 1.1 0.9 2.4 3.9 2.3 3.3 2.4 2.6 1.6 1.8 1.5 24.8

0900 1.3 1.1 0.9 0.6 2.3 4.0 2.9 2.9 2.3 2.3 2.0 2.1 1.3 24.5

0930 1.1 0.8 1.3 1.5 1.6 3.4 2.0 3.0 2.8 1.9 1.8 1.3 1.1 22.3

1000 0.9 0.4 1.1 0.9 1.0 3.4 2.9 2.9 2.1 1.9 1.0 1.5 0.9 19.9

1030 0.3 0.3 1.0 1.5 1.0 2.6 2.5 3.1 3.6 1.4 1.1 0.9 0.3 19.3

1100 0.4 0.5 0.8 0.5 1.3 1.9 3.0 2.4 3.4 1.8 1.0 0.8 0.4 17.5

1130 0.4 0.6 0.9 0.8 1.6 2.5 3.4 2.9 2.3 1.6 0.8 0.5 0.4 18.1

1200 0.4 0.5 1.0 0.8 1.1 2.0 3.3 2.9 2.1 1.8 0.5 0.8 0.4 17.0

1230 0.5 0.5 0.4 0.4 1.1 1.9 2.3 2.8 2.5 1.6 0.4 1.1 0.5 15.4

1300 0.3 0.3 0.6 0.6 0.5 2.4 3.0 2.4 2.0 1.8 0.6 1.6 0.3 16.0

MEAN 2.0 2.0 1.9 2.1 2.8 2.8 2.2 2.8 2.6 2.5 2.0 2.7 2.0 28.2





Table 22. Average number of cases when Т-Тd>4

Month/


1300 27.3 29.1 28.3 26.3 25.0 21.8 12.0 14.3 14.6 24.0 25.5 26.4 27.3 274.4

1330 26.6 29.4 28.8 26.1 24.8 21.1 11.3 14.6 14.3 23.9 25.8 27.0 26.6 273.5

1400 26.3 28.8 27.9 26.4 24.9 20.9 10.8 13.8 14.5 24.0 25.9 26.5 26.3 270.4

1430 26.0 29.0 28.1 26.1 24.8 19.6 9.6 12.1 14.3 24.5 25.6 26.5 26.0 266.3

1500 26.0 28.8 27.9 25.8 24.9 18.6 8.3 11.6 13.3 24.5 25.3 26.0 26.0 260.8

1530 26.0 28.6 28.3 25.3 24.0 16.8 7.4 9.5 12.1 23.3 25.4 26.4 26.0 252.9

1600 25.3 28.8 27.3 24.3 23.3 15.3 6.3 8.3 11.5 23.0 24.8 25.5 25.3 243.3

1630 24.9 27.8 27.0 24.3 21.6 14.0 5.8 8.1 9.8 21.9 24.6 25.0 24.9 234.6

1700 24.3 27.6 26.1 23.5 20.1 13.3 5.9 7.5 9.1 20.5 23.9 24.9 24.3 226.6

1730 24.4 26.9 25.8 22.8 18.9 12.1 5.0 7.5 8.5 19.5 23.1 23.6 24.4 218.0

1800 22.1 25.8 24.1 21.3 18.1 10.5 5.4 6.3 7.3 18.8 22.8 22.4 22.1 204.6

1830 21.1 24.6 23.9 20.0 17.9 10.4 5.4 6.6 7.4 17.8 21.5 21.6 21.1 198.1

1900 20.3 24.4 22.9 19.9 16.9 9.3 5.9 5.9 7.0 17.8 21.4 20.3 20.3 191.6

1930 19.5 23.5 22.0 19.0 15.0 9.5 5.8 6.0 7.0 16.8 20.5 19.4 19.5 183.9

2000 18.4 22.6 21.9 18.6 13.4 9.1 5.6 5.3 6.5 16.3 19.3 17.4 18.4 174.3

2030 17.5 21.4 20.1 17.3 12.3 9.0 5.8 4.4 6.9 16.3 18.8 17.4 17.5 166.9

2100 16.4 19.6 19.5 16.5 11.4 7.9 5.3 4.9 6.1 16.6 17.8 16.1 16.4 158.0

2130 15.4 18.3 18.3 14.8 10.5 7.6 5.6 5.3 6.5 14.9 17.8 15.0 15.4 149.8

2200 14.4 17.1 17.9 13.5 8.9 6.6 5.3 4.9 6.8 14.1 17.5 13.5 14.4 140.4

2230 12.9 16.1 16.6 12.8 9.3 6.8 4.9 5.0 6.4 14.4 16.8 13.0 12.9 134.8

2300 11.5 14.6 16.8 12.4 8.0 6.5 4.6 4.8 6.5 13.3 15.4 12.5 11.5 126.8

2330 10.8 13.4 15.6 11.5 7.6 5.6 5.0 4.0 5.9 13.8 14.9 11.0 10.8 119.0

0000 9.5 12.9 13.9 10.3 6.9 5.6 4.6 3.4 5.8 12.5 14.6 9.1 9.5 109.0

0030 7.8 11.6 12.6 9.1 6.4 5.1 4.8 3.3 4.9 11.6 13.5 9.0 7.8 99.6

0100 7.5 11.0 11.6 9.1 5.6 5.6 4.5 3.1 5.3 11.3 13.0 7.6 7.5 95.3

0130 6.4 9.6 10.5 8.5 4.6 5.4 4.4 2.9 5.0 10.0 11.4 6.5 6.4 85.1

0200 5.3 8.1 9.8 7.4 4.1 5.8 4.4 2.5 4.9 9.9 11.6 6.1 5.3 79.8

0230 4.3 7.9 9.0 6.5 4.3 5.3 4.1 3.0 4.8 9.8 11.4 5.3 4.3 75.4

0300 4.3 7.3 7.9 6.8 4.5 5.3 4.1 2.8 4.5 9.9 10.3 4.6 4.3 72.0

0330 3.8 7.0 7.8 6.6 3.6 4.8 4.3 2.8 4.5 9.9 9.1 4.5 3.8 68.5

0400 4.6 7.9 7.1 6.1 3.8 4.3 4.1 2.5 4.4 10.1 9.8 4.5 4.6 69.1

0430 6.1 9.3 8.4 5.9 4.3 4.6 4.0 2.4 4.4 9.8 9.6 6.5 6.1 75.1

0500 9.0 12.0 9.4 6.3 4.0 4.5 3.8 2.8 4.0 9.1 10.3 7.4 9.0 82.4

0530 11.8 15.6 12.0 6.9 3.9 4.5 4.1 2.5 4.6 9.0 10.8 10.3 11.8 95.9

0600 15.0 18.6 15.1 9.5 4.4 4.5 4.6 2.1 4.0 9.1 12.4 13.5 15.0 112.9

0630 18.0 21.6 19.3 13.0 5.4 4.9 4.3 2.3 3.8 10.6 14.4 17.0 18.0 134.4

0700 20.4 23.4 20.8 15.9 8.6 5.8 4.8 2.4 4.8 12.9 17.8 20.4 20.4 157.6

0730 22.0 25.1 23.1 18.8 11.4 6.8 4.9 3.4 5.9 16.1 19.6 21.8 22.0 178.8

0800 23.6 26.1 25.0 21.6 14.5 9.0 5.1 4.3 6.9 18.1 20.6 23.0 23.6 197.9

0830 24.8 26.8 25.8 23.5 17.6 11.1 5.9 5.8 7.1 20.0 22.3 24.0 24.8 214.5

0900 25.3 27.8 26.0 24.3 20.3 13.3 6.9 7.0 8.3 21.4 23.1 24.9 25.3 228.3

0930 26.1 27.9 26.4 24.1 21.9 15.5 8.5 8.4 9.8 22.3 24.0 25.6 26.1 240.4

1000 26.5 28.8 27.5 25.6 22.8 17.1 8.8 9.4 10.5 22.6 24.9 26.3 26.5 250.6

1030 27.4 29.3 27.3 25.1 23.0 18.5 9.6 10.9 10.8 23.4 25.4 26.3 27.4 256.8

1100 27.0 29.1 27.5 25.6 23.6 19.8 10.5 12.1 12.3 23.1 25.4 26.4 27.0 262.4

1130 27.4 29.0 28.1 25.9 24.1 20.3 11.1 13.1 13.1 24.3 25.6 26.9 27.4 268.9

1200 27.0 28.8 27.9 26.1 24.6 21.3 11.9 13.8 13.3 24.1 25.6 26.5 27.0 270.8

1230 27.3 29.4 28.5 26.4 24.4 21.8 12.4 13.6 13.8 23.6 25.8 26.6 27.3 273.4

1300 27.3 29.1 28.3 26.3 25.0 21.8 12.0 14.3 14.6 24.0 25.5 26.4 27.3 274.4

MEAN 18.2 21.2 20.5 17.6 14.3 10.9 6.4 6.5 8.0 17.0 19.1 18.1 18.2 177.6





2.3 Air pressure

Air pressure, as a parameter of high importance in aviation, is shown in two ways:

Monthly and annual frequency (%) of distribution of air pressure at sea level (QNH) is shown in Table 23;

Mean value of the air pressure at sea level (QHN) per months and for the year (Table 25)

Throughout the year, air pressure is mostly in a 1015.0-1019.9 hPa range, with the yearly relative frequency of 28.7 %, and the highest relative frequency of 40.4 % occurs in September (Table 23). Mean monthly value of the air pressure is in a range between 1014.2 hPa in July and 1020.8 hPa in January. The lowest mean value is 1013.1 hPa in July at 1600 UTC, and the highest value of 1021.4 hPa in January, in the time period from 0830 to 0930 UTC (Table 25).

Table 23. Monthly and annual frequencies of air pressure (%)

Month/

Pressure (hPa)I II III IV V VI VII VIII IX X XI XII Year

980.0- 984.9 0 0 0.1 0 0 0 0 0 0 0 0 0 0.0

985.0- 989.9 0.1 0 0.7 0 0 0 0 0 0 0 0.4 0.1 0.1

990.0- 994.9 1.5 1.0 2.3 0.3 0.2 0 0 0 0 0.3 0.7 0.2 0.5

995.0- 999.9 1.7 2.4 1.9 2.4 0.6 0 0 0 0.3 0.2 3.3 2.3 1.2

1000.0-1004.9 2.9 6.0 4.9 5.0 2.6 1.9 1.3 0.9 0.6 0.8 5.8 4.4 3.1

1005.0-1009.9 6.3 12.6 12.0 14.8 12.2 11.6 11.1 11.7 4.0 5.1 8.3 11.8 10.1

1010.0-1014.9 8.2 17.9 16.9 25.6 29.1 35.5 39.2 36.9 24.5 15.1 11.1 17.7 23.2

1015.0-1019.9 17.5 16.8 21.9 30.1 36.4 38.9 37.5 40.1 40.4 26.1 17.4 20.2 28.7

1020.0-1024.9 25.5 17.2 22.5 18.1 17.1 11.4 10.9 9.8 22.7 32.4 25.0 14.2 18.9

1025.0-1029.9 19.1 15.5 9.9 2.7 1.8 0.7 0 0.7 7.4 17.9 20.7 10.8 8.9

1030.0-1034.9 12.3 5.9 6.1 1.0 0 0 0 0 0 2.2 5.6 8.4 3.4

1035.0-1039.9 4.1 4.0 0.8 0 0 0 0 0 0 0 1.6 8.0 1.5

1040.0-1044.9 0.7 0.8 0 0 0 0 0 0 0 0 0 1.9 0.3

1045.0-1049.9 0 0 0 0 0 0 0 0 0 0 0 0 0

Table 24. Average air pressure (hPa) at specificied times

Month/


0100 1014.4 1014.2 1014.3 1017.0 1019.1 1018.4 1018.9 1020.9 1017.7 1016.3 1014.2 1014.7 1014.4 1016.7

0700 1015.2 1015.1 1015.2 1017.8 1019.8 1018.8 1019.0 1021.1 1017.8 1016.8 1015.2 1015.6 1015.2 1017.3

1300 1014.1 1013.9 1014.1 1016.8 1018.8 1017.8 1018.2 1020.2 1017.1 1015.7 1013.8 1014.5 1014.1 1016.3

1900 1014.1 1013.8 1014.1 1017.1 1019.2 1018.2 1019.1 1020.8 1017.5 1016.1 1014.2 1014.5 1014.1 1016.5




Table 25. Average air pressure (hPa)

Month/


1300 1014.1 1013.9 1014.1 1016.8 1018.8 1017.8 1018.2 1020.2 1017.1 1015.7 1013.8 1014.5 1014.1 1016.3

1330 1014.0 1013.8 1014.0 1016.7 1018.7 1017.7 1018.2 1020.1 1016.8 1015.6 1013.9 1014.3 1014.0 1016.1

1400 1013.9 1013.6 1013.8 1016.5 1018.6 1017.7 1018.2 1020.3 1017.0 1015.5 1013.5 1014.1 1013.9 1016.1

1430 1013.8 1013.4 1013.7 1016.5 1018.5 1017.6 1018.4 1020.3 1016.7 1015.4 1013.4 1014.0 1013.8 1016.0

1500 1013.6 1013.3 1013.6 1016.4 1018.5 1017.7 1018.5 1020.4 1016.8 1015.3 1013.4 1013.9 1013.6 1016.0

1530 1013.6 1013.2 1013.5 1016.3 1018.6 1017.7 1018.6 1020.4 1016.7 1015.2 1013.4 1013.8 1013.6 1015.9

1600 1013.5 1013.1 1013.4 1016.3 1018.6 1017.7 1018.6 1020.4 1017.1 1015.3 1013.3 1013.7 1013.5 1015.9

1630 1013.6 1013.2 1013.5 1016.4 1018.8 1017.8 1018.8 1020.5 1017.1 1015.4 1013.2 1013.8 1013.6 1016.0

1700 1013.6 1013.3 1013.5 1016.4 1018.9 1017.9 1018.9 1020.9 1017.3 1015.6 1013.2 1013.8 1013.6 1016.1

1730 1013.7 1013.4 1013.5 1016.5 1019.0 1018.1 1018.9 1020.7 1017.2 1015.8 1013.3 1014.0 1013.7 1016.2

1800 1013.8 1013.4 1013.7 1016.8 1019.0 1018.1 1019.0 1020.7 1017.6 1016.0 1013.7 1014.1 1013.8 1016.3

1830 1013.9 1013.6 1013.9 1017.0 1019.1 1018.1 1019.0 1021.0 1017.3 1016.0 1013.9 1014.3 1013.9 1016.4

1900 1014.1 1013.8 1014.1 1017.1 1019.2 1018.2 1019.1 1020.8 1017.5 1016.1 1014.2 1014.5 1014.1 1016.5

1930 1014.4 1014.0 1014.2 1017.1 1019.3 1018.3 1019.1 1020.8 1017.8 1016.1 1014.2 1014.7 1014.4 1016.7

2000 1014.5 1014.1 1014.2 1017.2 1019.4 1018.4 1019.1 1020.8 1017.8 1016.3 1014.3 1014.8 1014.5 1016.7

2030 1014.5 1014.1 1014.3 1017.2 1019.4 1018.4 1019.2 1020.9 1017.7 1016.3 1014.3 1014.9 1014.5 1016.8

2100 1014.6 1014.2 1014.4 1017.2 1019.4 1018.4 1019.1 1020.9 1017.6 1016.4 1014.3 1014.9 1014.6 1016.8

2130 1014.6 1014.2 1014.4 1017.3 1019.4 1018.5 1019.2 1020.9 1017.9 1016.4 1014.3 1015.0 1014.6 1016.8

2200 1014.6 1014.3 1014.5 1017.2 1019.4 1018.4 1019.2 1020.9 1017.6 1016.5 1014.4 1015.0 1014.6 1016.8

2230 1014.6 1014.3 1014.5 1017.2 1019.4 1018.5 1019.2 1020.8 1017.8 1016.4 1014.4 1014.9 1014.6 1016.8

2300 1014.6 1014.3 1014.4 1017.2 1019.3 1018.3 1019.1 1020.6 1017.7 1016.4 1014.4 1014.9 1014.6 1016.8

2330 1014.6 1014.3 1014.4 1017.2 1019.3 1018.3 1018.9 1020.7 1017.6 1016.4 1014.3 1014.8 1014.6 1016.7

0000 1014.4 1014.2 1014.5 1017.0 1019.3 1018.3 1018.8 1020.7 1017.9 1016.4 1014.4 1014.7 1014.4 1016.7

0030 1014.4 1014.2 1014.3 1017.0 1019.2 1018.4 1018.8 1020.8 1017.7 1016.4 1014.2 1014.6 1014.4 1016.7

0100 1014.4 1014.2 1014.3 1017.0 1019.1 1018.4 1018.9 1020.9 1017.7 1016.3 1014.2 1014.7 1014.4 1016.7

0130 1014.3 1014.2 1014.4 1016.9 1019.0 1018.3 1019.2 1020.8 1017.6 1016.1 1014.0 1014.6 1014.3 1016.6

0200 1014.3 1014.1 1014.3 1016.9 1019.0 1018.2 1018.9 1020.8 1017.4 1016.0 1014.2 1014.6 1014.3 1016.6

0230 1014.3 1014.1 1014.3 1016.8 1019.0 1018.1 1018.8 1020.6 1017.3 1016.1 1014.2 1014.6 1014.3 1016.5

0300 1014.4 1014.2 1014.3 1016.8 1019.0 1018.2 1018.4 1020.6 1017.3 1016.0 1014.2 1014.7 1014.4 1016.5

0330 1014.5 1014.3 1014.3 1016.9 1019.0 1018.2 1018.5 1020.5 1017.3 1016.0 1014.1 1014.8 1014.5 1016.5

0400 1014.6 1014.4 1014.5 1016.9 1019.0 1018.1 1018.4 1020.6 1017.3 1016.2 1014.1 1015.0 1014.6 1016.6

0430 1014.7 1014.6 1014.7 1017.1 1019.0 1018.1 1018.5 1020.6 1017.3 1016.3 1014.6 1015.1 1014.7 1016.7

0500 1014.8 1014.7 1014.8 1017.2 1019.2 1018.2 1018.6 1020.6 1017.3 1016.5 1014.7 1015.2 1014.8 1016.8

0530 1014.9 1014.8 1014.9 1017.4 1019.3 1018.4 1018.7 1020.7 1017.4 1016.5 1014.8 1015.3 1014.9 1016.9

0600 1015.0 1014.9 1015.1 1017.5 1019.5 1018.4 1018.8 1020.8 1017.5 1016.5 1014.9 1015.4 1015.0 1017.0

0630 1015.1 1015.0 1015.1 1017.6 1019.7 1018.8 1019.0 1020.9 1017.8 1016.8 1015.0 1015.6 1015.1 1017.2

0700 1015.2 1015.1 1015.2 1017.8 1019.8 1018.8 1019.0 1021.1 1017.8 1016.8 1015.2 1015.6 1015.2 1017.3

0730 1015.2 1015.0 1015.2 1017.8 1020.0 1018.9 1019.1 1021.3 1018.0 1016.9 1015.2 1015.6 1015.2 1017.3

0800 1015.2 1015.1 1015.3 1017.9 1020.0 1018.9 1019.2 1021.3 1017.9 1016.8 1015.3 1015.6 1015.2 1017.4

0830 1015.2 1015.1 1015.4 1018.0 1020.0 1019.0 1019.4 1021.4 1018.0 1017.0 1015.3 1015.7 1015.2 1017.4

0900 1015.2 1015.1 1015.4 1018.0 1020.1 1019.1 1019.5 1021.4 1018.0 1017.0 1015.3 1015.6 1015.2 1017.5

0930 1015.1 1015.0 1015.2 1017.9 1020.0 1019.0 1019.3 1021.4 1018.0 1017.0 1015.2 1015.6 1015.1 1017.4

1000 1015.0 1014.9 1015.1 1017.7 1019.9 1018.9 1019.1 1021.3 1018.0 1016.8 1015.0 1015.4 1015.0 1017.3

1030 1014.9 1014.8 1015.0 1017.6 1019.7 1018.5 1018.9 1021.1 1017.7 1016.8 1014.9 1015.3 1014.9 1017.1

1100 1014.8 1014.7 1014.8 1017.4 1019.5 1018.3 1018.8 1020.8 1017.7 1016.5 1014.7 1015.2 1014.8 1016.9

1130 1014.6 1014.5 1014.7 1017.3 1019.3 1018.1 1018.6 1020.5 1017.4 1016.4 1014.5 1015.0 1014.6 1016.7

1200 1014.4 1014.2 1014.6 1017.1 1019.0 1017.9 1018.4 1020.3 1017.4 1016.2 1014.3 1014.9 1014.4 1016.6

1230 1014.2 1014.1 1014.4 1017.0 1018.8 1017.8 1018.4 1020.4 1017.0 1015.9 1014.2 1014.6 1014.2 1016.4

1300 1014.1 1013.9 1014.1 1016.8 1018.8 1017.8 1018.2 1020.2 1017.1 1015.7 1013.8 1014.5 1014.1 1016.3

MEAN 1014.4 1014.2 1014.4 1017.1 1019.2 1018.3 1018.8 1020.8 1017.5 1016.2 1014.3 1014.8 1014.4 1016.7




2.4 Visibility and ceiling

There are two important meteorological elements that affect takeoff and landing of the aircraft: horizontal visibility and ceiling. Ceiling is height of the base of the lowest cloud layer when more than half of the sky is covered with clouds (BKN – broken – cloudiness from 5/8 – 7/8 and OVC – overcast – cloudiness 8/8). Therefore, this chapter covers horizontal visibility as well as relationship between horizontal visibility and ceiling.

2.4.1 Visibility

Visibility is the measure of transparency of the atmosphere regardless of whether it is day or night. Visibility that is measured in the horizontal plain is referred to as horizontal meteorological visibility. As horizontal visibility, METAR reports provide data on prevailing visibility, according to the definition given in ICAO Annex 3, Chapter I. Hereinafter the term visibility will be used, referring to horizontal prevailing visibility at aerodrome at specified time. Visibility in the atmosphere depends on the amount of aerosols and water particles in all physical states. Higher particle concentration causes reduction of visibility. Meteorological phenomena that most often lead to reduced visibility are fog and mist, precipitation, dust, smoke, soot and similar. Relative frequency (%) of horizontal visibility less than specified values at specific time per month is shown in Tables 26-37, whilst relative frequency of horizontal visibility at specific time for all months, for given values is shown in Tables 38-45. Reduced visibility occurs most often in the morning after the sunrise, in winter and late autumn months. In the morning, frequency of visibility is below 1500m up to 20% in winter and autumn months, whilst in spring and summer months it is up to 5%. In spring and summer months visibility is good (above or equal to 8000m) in more than 80% of the cases, that is, relative frequency of visibility less than 8000m is below 20%. The most significant phenomena that cause reduced visibility in winter and late autumn months in the morning hours are radiation and advection fog, as well higher frequency of other meteorological phenomena that lead to reduced visibility. Radiation fog is formed in relatively stady air over the ground cooled due to the radiation, that is, in predominantly clear sky and light wind near the ground (1-8 kt). It is shallow fog and most often occurs in the morning immediately after the sunrise. Advection fogs occur in the winter, with stronger wind (6-15 kt) near the ground, when wet warm air transfers over the cold surface.




Table 26. Frequencies of visibility below specified values at specified times – January (ICAO Model B) MODEL B

AERODROME: LYBE MONTH: ITOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

TIME(UTC) < 200 < 400 <600 <800 < 1 500 < 3 000 < 5 000 < 8 0000000 1.2 6.1 8.6 9.8 12.3 24.2 36.9 50.8

0030 1.2 7.1 9.5 10.0 13.7 23.2 35.7 49.4

0100 0.8 6.5 9.3 9.7 13.4 23.5 34.8 49.4

0130 0.8 6.5 8.9 10.2 13.8 24.4 36.2 48.0

0200 1.2 6.1 8.2 9.8 15.1 24.9 35.5 46.1

0230 0.8 6.6 8.6 9.8 13.9 23.8 34.8 45.5

0300 1.2 5.7 8.1 9.3 12.6 23.1 35.6 47.4

0330 1.2 6.5 7.7 8.5 12.2 22.8 36.6 47.2

0400 2.0 7.3 8.2 9.8 12.7 22.9 36.3 47.3

0430 1.6 7.3 9.8 10.2 13.4 22.0 36.2 47.6

0500 1.2 7.7 9.7 10.5 13.0 21.5 34.4 46.6

0530 1.6 6.9 8.1 8.9 12.6 21.5 33.7 45.1

0600 1.6 6.9 9.4 9.8 13.1 25.7 36.3 44.5

0630 2.5 7.5 7.9 9.2 17.2 32.6 43.5 53.1

0700 2.4 6.9 8.1 9.3 18.2 35.6 44.5 54.3

0730 3.3 6.9 8.6 10.2 20.4 35.5 44.9 54.7

0800 3.2 6.1 8.5 10.5 19.4 34.8 45.3 56.3

0830 2.9 6.1 8.2 10.7 18.9 32.0 43.4 57.8

0900 2.5 5.7 7.0 8.6 16.0 30.3 41.0 56.1

0930 2.4 4.1 5.7 7.8 16.3 26.9 38.8 53.9

1000 2.0 4.1 5.3 6.1 12.3 25.4 37.3 53.3

1030 1.7 3.3 4.6 5.8 12.4 25.7 34.9 51.5

1100 1.2 3.3 3.7 5.7 12.3 23.8 33.2 48.8

1130 0.8 2.1 2.9 3.7 10.3 21.5 31.4 46.3

1200 0.8 1.6 2.9 3.7 9.4 18.9 31.1 44.3

1230 0.4 1.2 2.5 3.3 9.6 18.8 30.0 43.8

1300 0.8 1.6 2.5 3.7 8.2 16.8 30.7 44.3

1330 0.8 2.0 2.5 4.1 8.6 17.2 27.9 44.7

1400 0.8 1.6 2.0 3.3 8.6 17.6 29.1 43.4

1430 0.8 2.1 2.1 3.4 8.0 19.8 30.4 45.1

1500 0.8 2.1 3.3 3.7 8.6 21.0 30.9 44.4

1530 1.3 2.1 3.3 3.3 7.9 21.3 32.2 50.2

1600 1.2 2.1 2.9 3.3 5.8 14.8 29.2 48.6

1630 0.8 1.7 2.1 2.5 5.0 13.3 25.3 44.0

1700 0.8 3.3 4.1 4.6 5.8 13.7 24.9 43.6

1730 0.8 3.7 4.1 4.1 5.7 13.8 25.6 43.5

1800 1.6 4.1 4.5 5.3 5.8 15.2 25.5 45.7

1830 1.2 3.8 4.6 5.0 6.2 17.5 29.2 47.5

1900 1.2 4.1 4.9 5.7 8.1 17.9 31.3 45.5

1930 2.0 4.0 5.2 5.6 9.7 17.3 31.9 47.2

2000 2.5 3.7 4.9 4.9 8.2 16.5 31.7 47.7

2030 2.5 4.5 4.9 5.3 8.6 18.9 32.5 49.0

2100 2.5 3.7 4.9 5.3 8.6 19.3 31.3 47.3

2130 2.5 4.1 5.3 6.6 7.4 18.1 30.9 47.3

2200 2.0 4.0 5.3 6.1 8.5 21.9 33.2 47.4

2230 2.0 4.1 6.1 6.1 10.7 23.4 32.4 47.1

2300 1.6 5.3 6.9 6.9 10.5 22.3 33.2 49.0

2330 1.2 6.1 6.9 7.3 10.1 22.7 34.4 48.2

MEAN 1.5 4.6 5.9 6.8 11.2 22.2 33.9 48.1

Remarks

PERIOD OF RECORD: 2005 - 2012

FREQUENCIES (%) OF VISIBILITY BELOW SPECIFIED VALUES (m) AT SPECIFIED TIMES

VISIBILITY


Cases when a certa in phenomenon is not occurred and frequency i s 0 are shaded white




Table 27. Frequency of visibility below specified values at specified times – February (ICAO Model B) MODEL B

AERODROME: LYBE MONTH: IITOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

TIME(UTC) < 200 < 400 <600 <800 < 1 500 < 3 000 < 5 000 < 8 0000000 0.9 1.4 1.8 3.2 8.7 19.7 31.7 45.9

0030 0.5 2.3 3.7 4.6 7.4 21.7 34.1 46.1

0100 0.4 2.7 4.0 5.4 8.5 19.3 34.1 46.2

0130 0.4 2.2 4.0 4.9 8.5 20.6 35.4 47.1

0200 0.9 3.6 4.5 4.9 7.6 20.2 34.5 46.6

0230 0.5 2.7 4.1 5.4 6.8 20.3 34.7 46.8

0300 1.3 3.1 4.5 5.8 7.6 19.6 33.9 45.5

0330 1.8 3.7 5.0 6.8 7.8 19.6 32.9 44.7

0400 1.8 4.5 5.8 7.6 11.6 20.1 34.4 46.4

0430 2.2 5.8 7.1 7.6 11.6 20.9 33.8 46.2

0500 2.2 4.0 5.8 7.2 11.2 21.1 35.4 48.0

0530 1.8 4.5 6.2 7.6 12.9 22.8 37.1 50.4

0600 2.8 7.1 9.0 10.4 17.5 29.9 41.7 53.1

0630 2.7 5.0 8.1 11.3 19.5 33.5 45.2 56.1

0700 3.2 6.0 8.3 9.6 20.6 31.2 44.5 56.9

0730 2.3 5.0 7.2 9.0 19.0 33.0 44.8 57.0

0800 2.2 5.4 7.2 9.9 18.8 30.9 44.4 56.5

0830 1.8 2.7 4.5 8.2 17.7 29.5 44.1 55.5

0900 0.9 1.4 3.2 5.5 16.1 30.9 41.5 55.3

0930 0.4 0.4 1.8 3.1 13.5 27.8 40.8 52.0

1000 0.0 0.9 1.8 3.2 11.3 25.2 37.4 51.4

1030 0.0 0.5 1.4 2.3 11.3 22.5 36.5 49.1

1100 0.0 0.4 0.9 2.7 11.7 22.4 31.8 44.8

1130 0.0 0.0 0.9 2.7 11.2 21.5 29.6 43.9

1200 0.0 0.0 1.4 3.2 9.5 21.3 29.0 40.3

1230 0.0 0.0 0.5 2.3 8.3 19.7 26.6 39.0

1300 0.0 0.0 0.0 0.5 8.1 18.0 24.8 36.5

1330 0.0 0.0 0.0 0.9 6.4 17.7 25.5 36.4

1400 0.0 0.0 0.0 0.9 6.7 20.2 25.6 36.3

1430 0.0 0.0 0.0 0.5 5.9 19.6 26.0 37.0

1500 0.0 0.0 0.0 0.4 4.0 19.3 27.4 37.7

1530 0.0 0.0 0.5 0.5 3.7 18.9 27.2 39.6

1600 0.0 0.0 0.5 0.5 3.6 18.5 31.5 42.8

1630 0.0 0.0 0.5 0.5 2.3 14.4 29.7 45.0

1700 0.0 0.0 0.4 0.9 2.2 11.7 24.2 41.7

1730 0.0 0.0 0.9 0.9 1.8 10.4 23.4 39.6

1800 0.0 0.0 0.5 0.5 1.9 11.4 25.7 41.9

1830 0.0 0.0 0.4 0.9 2.7 10.7 23.7 39.7

1900 0.0 0.0 0.0 0.4 2.2 11.2 24.2 44.4

1930 0.0 0.0 0.0 0.0 4.1 10.9 25.0 45.0

2000 0.0 0.5 0.5 0.5 6.4 12.8 25.2 44.5

2030 0.0 1.4 1.4 1.4 7.3 14.5 29.5 43.6

2100 0.5 1.4 1.4 1.8 7.8 16.4 30.1 45.7

2130 0.5 0.9 2.3 2.7 7.8 16.4 31.5 44.3

2200 0.5 1.4 1.8 2.7 7.7 15.8 32.6 48.0

2230 0.9 1.8 2.7 2.7 9.5 17.7 32.7 47.3

2300 0.9 1.4 2.7 2.7 7.7 18.2 33.6 45.5

2330 0.9 1.8 2.3 2.7 8.6 19.0 33.0 44.3

MEAN 0.7 1.8 2.7 3.7 9.1 20.2 32.5 45.8

Remarks


VISIBILITY







Table 28. Frequency of visibility below specified values at specified times – March (ICAO Model B) MODEL B

AERODROME: LYBE MONTH: IIITOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

TIME(UTC) < 200 < 400 <600 <800 < 1 500 < 3 000 < 5 000 < 8 0000000 0.0 0.0 0.0 0.4 1.7 5.0 8.7 18.7

0030 0.0 0.0 0.0 0.0 1.3 5.0 10.5 19.7

0100 0.0 0.0 0.0 0.0 0.8 5.4 9.6 20.1

0130 0.0 0.0 0.0 0.8 1.7 5.4 10.0 20.3

0200 0.0 0.4 0.4 1.3 2.1 4.7 9.3 21.6

0230 0.0 0.4 1.2 1.2 2.1 4.6 10.0 20.3

0300 0.4 1.2 1.2 1.6 3.3 4.5 11.5 19.8

0330 0.4 1.7 1.7 1.7 2.1 4.6 11.6 19.5

0400 0.0 1.2 2.0 2.0 2.4 5.3 11.4 21.2

0430 0.0 0.4 0.8 1.2 2.8 6.5 12.6 22.8

0500 0.0 1.2 1.2 1.6 3.3 8.6 16.8 30.7

0530 0.0 0.8 1.6 2.0 4.9 10.5 19.4 33.6

0600 0.0 0.4 0.4 1.2 4.5 11.5 19.7 33.2

0630 0.0 0.4 1.3 1.3 5.0 13.9 21.8 31.9

0700 0.0 0.8 1.2 1.2 3.7 9.8 19.3 31.1

0730 0.4 0.8 0.8 0.8 3.3 8.5 15.9 28.5

0800 0.4 0.8 0.8 1.2 3.3 7.4 11.5 23.8

0830 0.4 0.4 0.4 1.2 2.9 7.8 10.7 20.5

0900 0.4 0.4 0.8 1.2 1.2 5.3 10.2 18.4

0930 0.4 0.8 0.8 1.2 1.6 4.5 7.7 15.9

1000 0.0 0.8 0.8 1.2 1.6 3.7 7.4 14.0

1030 0.0 0.0 0.4 1.2 1.7 3.3 7.1 13.3

1100 0.0 0.0 0.0 0.4 1.7 2.9 5.4 12.9

1130 0.0 0.0 0.0 0.0 1.2 2.9 4.9 12.8

1200 0.0 0.0 0.4 0.8 1.2 2.9 6.1 11.5

1230 0.0 0.0 0.4 0.4 0.8 2.1 5.9 12.6

1300 0.0 0.4 0.4 0.4 1.2 2.9 5.7 11.4

1330 0.0 0.4 0.8 0.8 1.2 2.5 5.3 11.5

1400 0.0 0.0 0.0 0.0 0.8 1.6 4.9 10.2

1430 0.0 0.0 0.4 0.4 0.8 1.2 4.9 9.8

1500 0.0 0.0 0.0 0.0 0.4 2.4 5.3 10.5

1530 0.0 0.0 0.0 0.0 0.8 2.9 5.4 10.0

1600 0.0 0.0 0.0 0.0 0.8 3.3 5.8 10.7

1630 0.0 0.0 0.0 0.0 0.8 3.3 5.7 13.5

1700 0.0 0.0 0.0 0.0 0.8 3.3 4.9 13.1

1730 0.0 0.4 0.4 0.4 0.8 3.3 5.7 10.2

1800 0.0 0.4 0.4 0.4 0.8 2.9 4.1 9.0

1830 0.0 0.0 0.4 0.8 0.8 2.5 4.5 8.6

1900 0.0 0.0 0.0 0.4 0.8 2.0 4.9 10.6

1930 0.0 0.0 0.0 0.4 0.8 2.0 4.5 12.7

2000 0.0 0.0 0.0 0.4 0.4 2.1 4.9 14.0

2030 0.0 0.0 0.4 0.4 0.4 2.5 5.3 13.5

2100 0.0 0.4 0.4 0.4 0.4 1.6 6.1 14.6

2130 0.0 0.4 0.8 0.8 0.8 1.3 5.5 15.1

2200 0.0 0.8 0.8 0.8 0.8 2.0 6.6 15.2

2230 0.0 0.4 0.8 0.8 0.8 2.1 7.9 16.2

2300 0.0 0.0 0.4 0.8 0.8 2.9 8.3 17.1

2330 0.0 0.4 0.4 1.2 1.6 4.1 8.2 16.0

MEAN 0.1 0.4 0.5 0.8 1.7 4.4 8.7 17.1

Remarks


VISIBILITY







Table 29. Frequency of visibility below specified values at specified times – April (ICAO Model B) MODEL B

AERODROME: LYBE MONTH: IVTOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

TIME(UTC) < 200 < 400 <600 <800 < 1 500 < 3 000 < 5 000 < 8 0000000 0.0 0.0 0.0 0.0 0.4 1.7 4.2 8.5

0030 0.0 0.0 0.0 0.4 0.8 1.7 5.1 9.3

0100 0.0 0.0 0.0 0.0 0.8 2.1 5.5 11.0

0130 0.0 0.0 0.0 0.4 1.3 2.6 6.5 11.2

0200 0.0 0.0 0.4 1.3 2.1 3.4 8.1 11.5

0230 0.0 0.0 0.9 1.3 2.1 3.4 8.9 12.8

0300 0.4 1.3 2.1 2.1 2.5 5.0 9.2 14.6

0330 0.0 1.3 1.3 1.7 2.6 5.6 10.3 16.2

0400 0.0 1.3 2.6 2.6 3.9 7.7 13.7 20.6

0430 0.8 1.3 2.1 3.0 4.2 8.4 14.8 23.6

0500 0.4 1.7 2.1 2.6 4.3 8.9 16.2 24.7

0530 0.8 1.2 1.2 1.2 3.3 7.5 13.3 22.9

0600 0.4 0.9 0.9 0.9 2.1 6.0 11.2 19.3

0630 0.0 0.4 0.4 0.4 0.9 4.3 8.1 15.7

0700 0.0 0.0 0.4 0.4 0.4 4.2 7.2 15.3

0730 0.0 0.0 0.0 0.0 0.0 3.4 6.3 12.2

0800 0.0 0.0 0.0 0.0 0.0 1.7 5.5 9.3

0830 0.0 0.0 0.0 0.0 0.0 1.3 3.4 8.4

0900 0.0 0.0 0.0 0.0 0.0 1.3 2.2 5.7

0930 0.0 0.0 0.0 0.0 0.0 0.4 2.1 6.0

1000 0.0 0.0 0.0 0.0 0.0 0.4 2.1 5.1

1030 0.0 0.0 0.0 0.0 0.0 0.4 1.7 5.0

1100 0.0 0.0 0.0 0.0 0.0 0.4 2.6 4.7

1130 0.0 0.0 0.0 0.0 0.0 0.4 2.1 4.7

1200 0.0 0.0 0.0 0.0 0.0 0.0 1.3 4.3

1230 0.0 0.0 0.0 0.0 0.0 0.0 0.9 4.3

1300 0.0 0.0 0.0 0.0 0.0 0.0 0.9 3.4

1330 0.0 0.0 0.0 0.0 0.0 0.4 1.7 5.1

1400 0.0 0.0 0.0 0.0 0.0 0.4 1.3 3.4

1430 0.0 0.0 0.0 0.0 0.0 0.4 2.5 4.2

1500 0.0 0.0 0.0 0.0 0.4 0.4 0.4 4.7

1530 0.0 0.0 0.0 0.0 0.4 0.4 0.4 3.0

1600 0.0 0.0 0.0 0.0 0.4 0.4 1.3 4.2

1630 0.0 0.0 0.0 0.0 0.0 0.8 2.5 5.1

1700 0.0 0.0 0.0 0.0 0.0 0.8 2.5 4.7

1730 0.0 0.0 0.0 0.0 0.0 1.7 3.0 5.9

1800 0.0 0.0 0.0 0.0 0.0 1.3 3.0 4.2

1830 0.0 0.0 0.0 0.0 0.0 1.3 3.0 4.2

1900 0.0 0.0 0.0 0.0 0.0 0.8 2.1 3.8

1930 0.0 0.0 0.0 0.0 0.0 0.8 2.1 4.6

2000 0.0 0.0 0.0 0.0 0.0 0.4 1.7 4.2

2030 0.0 0.0 0.0 0.0 0.0 1.3 2.6 4.7

2100 0.0 0.0 0.0 0.0 0.0 0.9 2.6 5.1

2130 0.0 0.0 0.0 0.0 0.0 0.0 2.5 4.6

2200 0.0 0.0 0.4 0.4 0.4 1.3 3.0 5.5

2230 0.0 0.0 0.4 0.4 0.4 1.3 2.5 6.3

2300 0.0 0.0 0.0 0.0 0.0 1.3 3.0 7.2

2330 0.0 0.0 0.0 0.0 0.4 1.3 3.8 7.7

MEAN 0.1 0.2 0.3 0.4 0.7 2.1 4.6 8.6

Remarks


VISIBILITY







Table 30. Frequency of visibility below specified values at specified times – May (ICAO Model B) MODEL B

AERODROME: LYBE MONTH: VTOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

TIME(UTC) < 200 < 400 <600 <800 < 1 500 < 3 000 < 5 000 < 8 0000000 0.0 0.0 0.0 0.0 0.0 0.8 2.0 4.1

0030 0.0 0.0 0.0 0.0 0.4 1.2 2.0 3.7

0100 0.0 0.0 0.0 0.0 0.0 1.2 2.4 4.5

0130 0.0 0.0 0.0 0.0 0.0 0.8 2.9 5.3

0200 0.0 0.0 0.4 0.4 1.2 1.2 3.3 4.9

0230 0.0 0.0 0.0 0.0 0.4 1.2 3.3 7.8

0300 0.0 0.0 0.0 0.0 0.4 2.0 4.5 11.0

0330 0.0 0.0 0.4 0.4 2.0 4.1 6.5 15.4

0400 0.0 0.0 0.0 0.0 1.2 4.9 7.8 17.2

0430 0.0 0.0 0.4 0.4 0.8 4.0 9.3 17.0

0500 0.0 0.0 0.0 0.4 1.6 2.9 8.2 16.4

0530 0.0 0.0 0.0 0.0 0.8 2.4 6.1 13.5

0600 0.0 0.0 0.0 0.0 0.0 1.2 4.5 8.6

0630 0.0 0.0 0.0 0.0 0.0 0.8 2.4 6.9

0700 0.0 0.0 0.0 0.0 0.0 0.0 2.0 7.3

0730 0.0 0.0 0.0 0.0 0.0 0.0 1.2 4.5

0800 0.0 0.0 0.0 0.0 0.0 0.0 1.6 4.1

0830 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.8

0900 0.0 0.0 0.0 0.0 0.0 0.4 0.8 2.0

0930 0.0 0.0 0.0 0.0 0.0 0.0 1.2 2.0

1000 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.4

1030 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.1

1100 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.5

1130 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.8

1200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.6

1230 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.4

1300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.0

1330 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.6

1400 0.0 0.0 0.0 0.0 0.0 0.4 0.8 1.6

1430 0.0 0.0 0.0 0.0 0.0 0.4 0.4 0.8

1500 0.0 0.0 0.0 0.0 0.0 0.4 0.4 2.4

1530 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.0

1600 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.4

1630 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.3

1700 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.9

1730 0.0 0.0 0.0 0.0 0.0 0.4 0.8 3.3

1800 0.0 0.0 0.0 0.0 0.0 0.0 2.0 6.5

1830 0.0 0.0 0.0 0.0 0.0 0.0 2.0 5.7

1900 0.0 0.0 0.0 0.0 0.0 0.4 2.0 4.5

1930 0.0 0.0 0.0 0.0 0.0 0.0 1.2 4.5

2000 0.0 0.0 0.0 0.0 0.0 0.0 1.2 4.5

2030 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.2

2100 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.2

2130 0.0 0.0 0.0 0.0 0.0 0.0 1.2 3.3

2200 0.0 0.0 0.0 0.0 0.0 0.4 1.2 3.7

2230 0.0 0.0 0.0 0.0 0.0 0.4 2.1 2.5

2300 0.0 0.0 0.0 0.0 0.0 0.4 2.0 3.7

2330 0.0 0.0 0.0 0.0 0.0 0.8 2.0 3.7

MEAN 0.0 0.0 0.0 0.0 0.2 0.7 2.1 5.1

Remarks


VISIBILITY







Table 31. Frequency of visibility below specified values at specified times – June (ICAO Model B) MODEL B

AERODROME: LYBE MONTH: VITOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

TIME(UTC) < 200 < 400 <600 <800 < 1 500 < 3 000 < 5 000 < 8 0000000 0.0 0.0 0.0 0.4 0.4 0.9 1.3 2.6

0030 0.0 0.0 0.0 0.0 0.4 1.2 1.7 3.3

0100 0.0 0.0 0.0 0.0 0.4 0.8 1.2 3.3

0130 0.0 0.0 0.0 0.0 0.4 0.8 1.3 4.2

0200 0.0 0.0 0.0 0.0 0.4 1.3 2.1 6.3

0230 0.0 0.0 0.0 0.0 0.8 1.2 2.1 6.7

0300 0.0 0.0 0.4 0.4 0.8 2.1 6.2 12.9

0330 0.0 0.4 0.8 0.8 1.3 2.5 6.3 15.9

0400 0.0 0.4 0.4 0.4 1.7 2.5 5.4 15.4

0430 0.0 0.0 0.8 0.8 0.8 1.7 6.7 13.8

0500 0.0 0.0 0.8 0.8 0.8 2.1 5.9 12.2

0530 0.0 0.0 0.0 0.0 0.8 0.8 3.8 9.6

0600 0.0 0.0 0.0 0.0 0.4 0.8 3.0 8.0

0630 0.0 0.0 0.0 0.0 0.0 0.4 2.5 7.1

0700 0.0 0.0 0.0 0.0 0.0 0.8 2.9 8.8

0730 0.0 0.0 0.0 0.0 0.0 0.4 2.1 6.7

0800 0.0 0.0 0.0 0.0 0.0 0.0 1.7 5.8

0830 0.0 0.0 0.0 0.0 0.0 0.0 1.7 4.2

0900 0.0 0.0 0.0 0.0 0.0 0.4 1.3 3.0

0930 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.1

1000 0.0 0.0 0.0 0.0 0.0 0.4 0.4 2.5

1030 0.0 0.0 0.0 0.0 0.0 0.4 0.4 2.1

1100 0.0 0.0 0.0 0.0 0.0 0.4 0.4 2.5

1130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.7

1200 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.7

1230 0.0 0.0 0.0 0.0 0.0 0.4 1.2 2.9

1300 0.0 0.0 0.0 0.0 0.0 0.4 0.4 1.7

1330 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.1

1400 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.7

1430 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.3

1500 0.0 0.0 0.0 0.0 0.0 0.0 1.7 2.1

1530 0.0 0.0 0.0 0.0 0.0 0.0 1.7 2.1

1600 0.0 0.0 0.0 0.0 0.0 0.4 2.5 4.2

1630 0.0 0.0 0.0 0.0 0.0 0.0 1.3 2.5

1700 0.0 0.0 0.0 0.0 0.0 0.0 1.2 2.9

1730 0.0 0.0 0.0 0.0 0.0 0.0 1.7 2.5

1800 0.0 0.0 0.0 0.0 0.0 0.0 1.3 2.5

1830 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.3

1900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.7

1930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.1

2000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.7

2030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8

2100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8

2130 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.7

2200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3

2230 0.0 0.0 0.4 0.4 0.4 0.4 0.4 2.5

2300 0.0 0.0 0.4 0.4 0.4 0.4 0.4 2.1

2330 0.0 0.0 0.4 0.4 0.4 0.8 1.3 2.1

MEAN 0.0 0.0 0.1 0.1 0.2 0.5 1.7 4.4

Remarks


VISIBILITY







Table 32. Frequency of visibility below specified values at specified times – July (ICAO Model B) MODEL B

AERODROME: LYBE MONTH: VIITOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

TIME(UTC) < 200 < 400 <600 <800 < 1 500 < 3 000 < 5 000 < 8 0000000 0.0 0.0 0.0 0.0 0.0 0.4 0.4 3.6

0030 0.0 0.0 0.0 0.0 0.0 0.0 1.2 4.0

0100 0.0 0.0 0.0 0.0 0.0 0.4 1.2 4.9

0130 0.0 0.0 0.0 0.0 0.0 0.4 0.8 4.5

0200 0.0 0.0 0.0 0.0 0.0 0.4 2.0 6.9

0230 0.0 0.0 0.4 0.4 0.4 0.8 1.6 8.1

0300 0.0 0.0 0.0 0.0 0.4 1.6 4.5 12.7

0330 0.0 0.4 0.4 0.4 0.4 2.0 8.5 17.8

0400 0.0 0.8 0.8 0.8 1.2 3.2 9.3 15.3

0430 0.0 0.4 0.8 0.8 0.8 2.0 7.7 14.5

0500 0.0 0.0 0.4 0.4 0.8 1.2 6.0 11.7

0530 0.0 0.4 0.4 0.4 0.4 1.2 3.6 10.1

0600 0.0 0.0 0.0 0.0 0.4 0.4 2.0 7.7

0630 0.0 0.0 0.0 0.0 0.0 0.4 0.4 6.5

0700 0.0 0.0 0.0 0.0 0.0 0.0 0.4 6.1

0730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.8

0800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2

0830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4

1000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4

1100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4

1130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8

1200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4

1230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8

1400 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.8

1430 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8

1500 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4

1530 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.8

1600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8

1630 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.2

1700 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.6

1730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.0

1800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2

1830 0.0 0.0 0.0 0.0 0.4 0.4 0.8 1.6

1900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8

1930 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.2

2000 0.0 0.0 0.0 0.0 0.0 0.4 0.4 1.2

2030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4

2100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8

2130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4

2200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8

2230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.8

2300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.4

2330 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.8

MEAN 0.0 0.0 0.1 0.1 0.1 0.3 1.1 3.5

Remarks


VISIBILITY







Table 33. Frequencies of visibility below specified values at specified times – August (ICAO Model B) MODEL B

AERODROME: LYBE MONTH: VIIITOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

TIME(UTC) < 200 < 400 <600 <800 < 1 500 < 3 000 < 5 000 < 8 0000000 0.0 0.0 0.0 0.0 0.0 0.4 0.8 5.0

0030 0.0 0.4 0.4 0.4 0.4 0.8 2.0 4.5

0100 0.0 0.4 0.8 0.8 0.8 2.0 3.2 5.3

0130 0.0 0.8 0.8 1.2 1.2 2.0 2.8 5.3

0200 0.0 0.4 0.4 1.6 2.4 2.8 3.7 7.3

0230 0.0 0.0 1.2 1.6 2.0 2.8 4.8 8.1

0300 0.0 0.4 0.8 1.6 1.6 2.4 5.3 10.1

0330 0.0 0.0 0.4 0.8 1.2 3.6 6.5 13.8

0400 0.0 0.8 0.8 0.8 1.6 4.0 9.3 19.0

0430 0.4 1.2 1.6 1.6 1.6 4.0 11.3 19.4

0500 0.4 1.2 2.0 2.0 2.4 4.1 8.9 17.9

0530 0.8 2.0 2.0 2.0 2.0 4.0 7.3 15.0

0600 0.8 1.2 1.2 1.7 2.5 4.2 7.1 12.5

0630 0.0 0.4 0.4 0.8 1.6 3.2 6.9 10.1

0700 0.0 0.4 0.4 0.4 0.4 2.0 4.9 8.2

0730 0.0 0.0 0.0 0.0 0.4 1.6 3.2 7.7

0800 0.0 0.0 0.0 0.0 0.0 1.2 1.6 6.1

0830 0.0 0.0 0.0 0.0 0.0 0.4 2.4 5.7

0900 0.0 0.0 0.0 0.0 0.0 0.0 1.2 4.5

0930 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.8

1000 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.2

1030 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.7

1100 0.0 0.0 0.0 0.0 0.0 0.0 1.2 2.1

1130 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.0

1200 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.2

1230 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.6

1300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8

1330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.6

1400 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.8

1430 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.8

1500 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.8

1530 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.2

1600 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.6

1630 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.0

1700 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.5

1730 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.4

1800 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.1

1830 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.0

1900 0.0 0.0 0.0 0.0 0.0 0.0 1.2 1.6

1930 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.0

2000 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.0

2030 0.0 0.0 0.0 0.0 0.0 0.4 1.6 3.6

2100 0.0 0.0 0.0 0.0 0.0 0.0 1.2 3.7

2130 0.0 0.0 0.0 0.0 0.0 0.0 1.2 4.1

2200 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.9

2230 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.1

2300 0.0 0.0 0.0 0.0 0.0 0.0 1.2 4.5

2330 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.7

MEAN 0.1 0.2 0.3 0.4 0.5 1.0 2.4 5.3

Remarks


VISIBILITY







Table 34. Frequencies of visibility below specified values at specified times – September (ICAO Model B) MODEL B

AERODROME: LYBE MONTH: IXTOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

TIME(UTC) < 200 < 400 <600 <800 < 1 500 < 3 000 < 5 000 < 8 0000000 0.0 0.0 0.0 0.0 0.4 0.8 2.9 6.7

0030 0.0 0.0 0.0 0.0 0.8 2.5 3.8 7.9

0100 0.0 0.4 0.4 0.8 1.3 2.1 3.8 11.8

0130 0.4 0.8 0.8 0.8 1.7 2.5 4.2 12.2

0200 0.4 0.8 0.8 0.8 1.3 2.9 5.5 14.3

0230 0.0 0.8 1.3 1.3 1.7 3.8 7.5 15.5

0300 0.0 1.3 1.7 1.7 2.5 4.6 9.6 16.3

0330 0.0 1.3 1.3 1.3 2.5 5.9 9.7 17.2

0400 0.0 1.7 1.7 2.1 3.4 5.5 9.8 20.4

0430 0.0 1.3 2.5 2.5 4.2 8.4 17.3 28.3

0500 0.4 1.3 2.1 2.9 3.8 9.2 18.1 30.7

0530 0.4 0.8 1.3 1.7 2.1 7.2 17.3 29.1

0600 0.0 1.7 1.7 2.1 2.1 5.5 16.0 28.2

0630 0.0 1.7 1.7 1.7 1.7 4.2 11.3 25.9

0700 0.0 0.8 0.8 1.3 1.7 2.9 5.9 19.7

0730 0.0 0.0 0.4 0.4 1.3 2.5 5.9 17.6

0800 0.0 0.0 0.0 0.4 0.4 2.1 4.7 12.7

0830 0.0 0.0 0.0 0.0 0.0 1.3 3.4 9.7

0900 0.0 0.0 0.0 0.0 0.0 0.4 2.5 8.5

0930 0.0 0.0 0.0 0.0 0.0 0.9 2.6 8.5

1000 0.0 0.0 0.0 0.0 0.0 0.0 1.3 5.1

1030 0.0 0.0 0.0 0.0 0.0 0.0 1.7 5.1

1100 0.0 0.0 0.0 0.0 0.0 0.4 0.9 6.0

1130 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.8

1200 0.0 0.0 0.0 0.0 0.0 0.8 1.3 3.0

1230 0.0 0.0 0.0 0.0 0.0 0.0 0.9 3.4

1300 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.5

1330 0.0 0.0 0.0 0.0 0.0 0.9 0.9 2.1

1400 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.3

1430 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.7

1500 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.1

1530 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.5

1600 0.0 0.0 0.0 0.0 0.0 0.0 1.3 3.0

1630 0.0 0.0 0.0 0.0 0.0 0.0 2.5 5.0

1700 0.0 0.0 0.0 0.0 0.4 0.4 2.1 4.2

1730 0.0 0.0 0.0 0.0 0.4 0.4 0.8 4.2

1800 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.5

1830 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.0

1900 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.5

1930 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.1

2000 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.7

2030 0.0 0.0 0.0 0.4 0.4 0.4 1.3 2.5

2100 0.0 0.0 0.0 0.4 0.4 0.4 1.2 2.5

2130 0.0 0.0 0.0 0.0 0.4 0.4 1.7 3.0

2200 0.0 0.0 0.0 0.0 0.4 0.4 1.3 3.8

2230 0.0 0.4 0.4 0.4 0.4 0.4 1.7 5.9

2300 0.0 0.0 0.0 0.0 0.0 0.0 1.7 6.7

2330 0.0 0.0 0.0 0.0 0.0 0.4 2.1 6.8

MEAN 0.0 0.3 0.4 0.5 0.7 1.7 4.0 9.2

Remarks


VISIBILITY







Table 35. Frequencies of visibility below specified values at specified times – October (ICAO Model B) MODEL B

AERODROME: LYBE MONTH: XTOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

TIME(UTC) < 200 < 400 <600 <800 < 1 500 < 3 000 < 5 000 < 8 0000000 0.0 0.8 1.2 1.6 2.4 6.9 12.7 22.4

0030 0.0 1.2 2.0 2.4 4.0 7.7 11.7 23.9

0100 0.4 2.4 2.4 2.8 3.6 7.7 13.8 24.3

0130 0.0 2.0 2.4 2.4 4.1 7.7 15.0 24.8

0200 0.0 2.5 2.5 2.9 4.1 9.0 16.0 25.4

0230 0.0 2.4 2.4 2.8 4.5 8.9 17.4 27.9

0300 0.4 2.4 2.4 2.4 4.5 10.2 19.1 29.3

0330 0.4 2.0 2.4 3.7 4.9 10.6 19.5 30.1

0400 0.4 2.0 2.8 3.2 5.3 11.7 21.1 31.2

0430 0.8 3.3 4.1 4.5 6.1 14.3 23.7 35.5

0500 0.4 3.6 4.5 6.1 9.3 20.2 30.4 41.3

0530 1.2 4.5 6.1 6.1 10.2 20.0 34.7 45.7

0600 2.0 4.5 5.7 6.5 10.5 19.8 34.0 49.0

0630 1.2 5.7 6.5 6.5 10.5 18.2 31.2 48.6

0700 0.4 2.4 3.3 4.5 7.8 15.9 26.9 42.0

0730 0.4 0.8 2.0 2.4 5.7 12.2 22.8 35.8

0800 0.4 0.4 1.2 1.6 3.7 9.8 22.0 34.3

0830 0.0 0.4 0.8 0.8 2.8 6.1 19.4 31.2

0900 0.0 0.4 0.8 0.8 2.0 6.5 14.5 28.2

0930 0.0 0.0 0.4 0.8 2.4 4.9 12.7 24.5

1000 0.0 0.0 0.0 0.0 1.6 4.1 10.2 20.4

1030 0.0 0.0 0.0 0.0 0.4 3.7 9.1 18.9

1100 0.0 0.0 0.0 0.0 0.4 3.7 7.3 18.8

1130 0.0 0.0 0.0 0.0 0.4 3.2 6.5 18.1

1200 0.0 0.0 0.0 0.0 0.4 2.0 6.0 16.1

1230 0.0 0.0 0.0 0.0 0.4 1.6 6.1 15.6

1300 0.0 0.0 0.0 0.0 0.4 2.4 5.3 13.8

1330 0.0 0.0 0.0 0.0 0.4 2.4 6.1 12.7

1400 0.0 0.0 0.0 0.0 0.4 2.8 6.5 13.8

1430 0.0 0.0 0.0 0.0 0.4 2.4 7.3 13.8

1500 0.0 0.0 0.0 0.0 0.4 2.8 8.1 14.1

1530 0.0 0.0 0.0 0.0 0.0 2.8 8.1 15.4

1600 0.0 0.0 0.0 0.0 0.0 2.0 8.1 18.2

1630 0.0 0.0 0.0 0.0 0.0 1.6 6.1 16.3

1700 0.0 0.0 0.0 0.0 0.4 1.2 5.7 17.1

1730 0.0 0.0 0.0 0.0 0.0 1.2 6.5 16.7

1800 0.0 0.0 0.0 0.0 0.0 0.8 6.1 17.2

1830 0.0 0.0 0.0 0.0 0.4 0.4 7.3 18.7

1900 0.0 0.0 0.0 0.0 0.4 1.2 6.5 18.7

1930 0.0 0.0 0.0 0.4 0.4 1.2 5.7 18.8

2000 0.0 0.4 0.8 0.8 0.8 2.0 5.7 19.1

2030 0.0 0.8 0.8 0.8 0.8 2.4 6.5 20.3

2100 0.0 0.4 0.4 0.8 1.2 2.0 7.7 20.6

2130 0.0 1.2 1.2 1.2 1.2 2.4 9.3 20.2

2200 0.0 1.2 1.2 1.2 1.2 3.3 10.2 18.7

2230 0.0 1.2 1.2 1.2 1.2 4.1 11.4 20.3

2300 0.0 1.2 1.2 1.2 1.2 5.8 12.3 21.0

2330 0.0 1.2 1.2 1.2 1.6 6.1 11.8 22.0

MEAN 0.2 1.1 1.3 1.5 2.6 6.2 13.2 24.0

Remarks


VISIBILITY







Table 36. Frequencies of visibility below specified values at specified times – November (ICAO Model B) MODEL B

AERODROME: LYBE MONTH: XITOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

TIME(UTC) < 200 < 400 <600 <800 < 1 500 < 3 000 < 5 000 < 8 0000000 2.1 5.0 7.5 7.9 10.5 18.4 28.0 36.0

0030 2.1 6.8 8.9 8.9 12.2 21.1 27.8 35.4

0100 1.7 7.5 9.2 9.6 13.4 23.0 28.9 36.4

0130 1.7 9.7 11.3 12.6 14.7 24.8 30.7 36.6

0200 2.1 9.2 11.3 13.0 15.1 25.2 30.7 37.8

0230 2.1 8.4 11.3 13.4 16.4 25.2 31.1 37.0

0300 3.4 8.0 12.2 13.0 17.2 25.2 33.2 39.5

0330 3.8 8.8 12.6 13.0 17.6 27.6 34.7 39.7

0400 3.4 9.3 12.2 13.9 17.3 28.3 35.0 40.5

0430 3.3 8.8 11.7 13.3 17.1 28.8 34.2 39.6

0500 2.9 9.2 13.3 14.2 17.9 26.2 35.0 40.8

0530 3.8 11.3 15.1 16.4 21.8 30.3 38.7 44.5

0600 5.0 12.1 15.1 16.3 24.3 34.7 41.0 49.0

0630 8.4 12.6 14.6 15.9 24.3 34.3 42.3 49.8

0700 7.6 11.9 13.6 14.8 22.0 33.5 39.8 47.9

0730 5.8 8.3 10.0 11.7 18.8 30.0 37.9 47.1

0800 4.2 8.0 8.8 9.7 15.1 25.2 36.1 44.5

0830 4.2 6.7 7.5 8.4 12.6 22.2 33.9 43.1

0900 2.1 6.3 6.7 7.6 12.6 19.7 29.8 39.5

0930 1.2 4.6 5.4 5.8 9.6 17.5 25.4 40.0

1000 0.8 3.8 4.6 5.5 7.6 14.7 23.5 37.0

1030 0.8 3.4 3.4 3.8 7.1 13.0 21.8 33.2

1100 0.8 2.9 3.3 3.3 5.4 11.3 20.5 30.5

1130 0.4 1.7 3.0 3.4 5.5 11.0 19.4 28.7

1200 0.4 1.3 2.5 3.4 5.5 10.1 18.1 25.7

1230 0.4 1.3 2.1 2.5 5.0 10.0 18.0 26.4

1300 0.4 1.7 2.1 3.0 5.9 11.0 18.1 25.7

1330 0.8 1.3 2.1 2.9 5.9 11.8 18.5 25.6

1400 0.8 1.7 2.5 2.9 6.3 12.2 18.1 26.5

1430 1.3 1.7 2.5 3.0 6.8 12.3 19.9 29.2

1500 1.3 2.1 3.3 3.3 6.7 14.2 20.9 33.5

1530 2.1 3.0 3.4 3.8 5.5 12.2 21.9 35.9

1600 1.7 2.5 3.0 3.8 5.1 8.9 17.4 31.8

1630 1.7 2.5 3.4 3.8 5.1 9.7 16.9 31.4

1700 1.7 2.5 3.4 3.8 4.7 8.1 16.5 31.4

1730 2.1 3.0 3.4 3.4 4.6 9.7 18.1 32.1

1800 2.1 2.9 3.3 3.3 5.0 10.5 20.9 33.1

1830 1.7 3.4 3.8 3.8 5.0 12.2 21.4 33.2

1900 1.3 3.4 3.8 5.1 6.3 13.1 21.9 34.2

1930 1.7 3.8 4.2 4.6 6.7 13.0 21.8 34.5

2000 1.3 4.2 5.0 5.0 6.7 13.0 24.8 33.2

2030 1.7 3.3 4.6 5.4 7.9 15.5 24.3 33.5

2100 1.7 3.8 5.0 5.4 7.5 15.9 24.3 34.7

2130 2.1 4.6 5.5 6.7 8.4 17.2 26.1 37.0

2200 2.1 4.2 4.6 5.4 7.9 17.2 25.9 36.0

2230 2.1 4.6 5.9 6.7 8.8 17.2 27.2 36.4

2300 2.1 5.1 6.0 6.8 9.4 18.3 26.8 36.2

2330 2.1 5.4 6.7 7.1 10.0 18.4 27.2 36.8

MEAN 2.3 5.4 6.8 7.5 10.7 18.4 26.6 36.0

Remarks


VISIBILITY







Table 37. Frequencies of visibility below specified values at specified times – December (ICAO Model B) MODEL B

AERODROME: LYBE MONTH: XIITOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

TIME(UTC) < 200 < 400 <600 <800 < 1 500 < 3 000 < 5 000 < 8 0000000 1.2 5.0 8.7 9.5 14.5 24.4 39.3 52.9

0030 1.2 4.1 7.8 9.5 13.6 24.3 39.1 52.7

0100 1.2 5.0 7.5 8.7 12.4 25.7 39.4 52.3

0130 1.2 4.1 7.1 8.7 12.4 24.1 39.4 50.6

0200 1.2 4.5 7.0 8.6 13.1 23.0 36.9 50.8

0230 1.6 4.5 7.8 9.4 13.1 22.1 37.3 52.5

0300 2.0 6.1 8.6 8.6 11.9 22.1 36.9 54.9

0330 2.0 6.0 7.3 8.5 11.3 21.8 35.9 53.6

0400 2.0 5.3 7.7 7.7 13.8 21.9 34.4 52.6

0430 2.0 6.9 8.9 9.7 13.3 21.4 35.1 52.0

0500 1.2 6.0 8.1 9.7 14.5 22.6 35.5 50.0

0530 1.2 4.9 7.7 10.1 14.2 23.1 35.2 47.8

0600 0.8 4.9 6.9 9.3 15.4 26.0 38.6 50.8

0630 1.6 7.3 8.9 9.3 19.4 34.4 42.9 57.9

0700 2.0 6.1 7.3 8.9 17.9 35.0 45.5 57.7

0730 2.0 5.2 6.9 8.1 18.1 36.3 44.4 56.9

0800 2.8 5.3 7.7 9.7 19.0 34.4 45.7 57.9

0830 2.4 4.9 8.1 11.0 16.7 31.7 44.7 58.9

0900 2.0 4.1 6.9 9.3 15.4 29.3 41.5 56.1

0930 2.0 4.0 5.6 8.1 13.3 29.4 41.1 54.4

1000 2.0 3.3 5.7 7.8 13.1 25.7 38.4 51.8

1030 1.6 2.8 4.9 7.3 13.0 24.0 35.0 48.0

1100 1.2 2.4 4.1 6.5 12.2 22.4 35.0 46.7

1130 0.8 2.4 4.0 6.5 10.5 21.1 33.2 47.0

1200 0.8 1.2 3.7 5.7 9.8 19.1 32.9 44.3

1230 0.8 1.2 2.0 5.3 9.8 21.2 32.2 43.3

1300 0.8 1.6 2.4 4.0 9.7 20.6 33.2 43.7

1330 1.2 1.6 1.6 3.3 9.0 21.3 32.4 43.9

1400 1.2 1.6 2.0 2.8 8.9 19.9 33.3 43.5

1430 1.2 2.0 2.9 4.5 7.8 20.0 34.3 45.7

1500 0.8 1.6 3.2 4.0 8.9 21.5 37.7 50.2

1530 0.8 2.4 2.8 3.7 6.9 18.3 35.0 50.0

1600 1.2 1.6 2.0 2.8 5.3 15.0 28.5 46.3

1630 1.2 1.6 2.0 3.3 5.3 15.1 26.9 47.8

1700 1.2 1.2 2.4 3.3 4.9 14.3 28.2 48.6

1730 1.2 1.7 3.3 4.5 5.4 14.9 28.1 47.9

1800 1.2 1.6 3.7 4.1 5.7 15.6 27.9 48.8

1830 1.2 2.4 4.0 4.0 6.1 15.0 28.3 49.4

1900 1.6 3.3 4.5 5.7 7.4 14.8 29.5 47.5

1930 1.6 4.5 5.3 5.7 7.3 15.0 30.1 49.2

2000 2.0 4.1 6.6 6.6 9.4 13.9 31.1 50.0

2030 2.1 4.5 6.6 7.0 10.3 15.2 31.3 51.4

2100 2.0 4.5 5.7 6.9 10.2 15.9 33.3 52.0

2130 1.6 4.1 6.1 7.8 10.7 18.9 36.5 53.7

2200 1.6 4.1 6.5 7.3 10.2 21.6 38.8 53.5

2230 1.6 5.3 7.7 8.9 12.2 20.3 39.0 54.1

2300 1.6 5.3 8.2 9.0 13.5 22.5 36.5 52.9

2330 1.6 5.3 9.3 10.6 13.8 23.2 37.8 53.3

MEAN 1.5 3.8 5.7 7.1 11.5 22.1 35.7 50.8

Remarks


VISIBILITY







Table 38. Frequencies of visibility < 200 m (based on ICAO Model B)

MOUNTH/

TIME (UTC)VI VII VIII IX X XI XII I II III IV V VI

1300 0.0 0.0 0.0 0.0 0.0 0.4 0.8 0.8 0.0 0.0 0.0 0.0 0.0

1330 0.0 0.0 0.0 0.0 0.0 0.8 1.2 0.8 0.0 0.0 0.0 0.0 0.0

1400 0.0 0.0 0.0 0.0 0.0 0.8 1.2 0.8 0.0 0.0 0.0 0.0 0.0

1430 0.0 0.0 0.0 0.0 0.0 1.3 1.2 0.8 0.0 0.0 0.0 0.0 0.0

1500 0.0 0.0 0.0 0.0 0.0 1.3 0.8 0.8 0.0 0.0 0.0 0.0 0.0

1530 0.0 0.0 0.0 0.0 0.0 2.1 0.8 1.3 0.0 0.0 0.0 0.0 0.0

1600 0.0 0.0 0.0 0.0 0.0 1.7 1.2 1.2 0.0 0.0 0.0 0.0 0.0

1630 0.0 0.0 0.0 0.0 0.0 1.7 1.2 0.8 0.0 0.0 0.0 0.0 0.0

1700 0.0 0.0 0.0 0.0 0.0 1.7 1.2 0.8 0.0 0.0 0.0 0.0 0.0

1730 0.0 0.0 0.0 0.0 0.0 2.1 1.2 0.8 0.0 0.0 0.0 0.0 0.0

1800 0.0 0.0 0.0 0.0 0.0 2.1 1.2 1.6 0.0 0.0 0.0 0.0 0.0

1830 0.0 0.0 0.0 0.0 0.0 1.7 1.2 1.2 0.0 0.0 0.0 0.0 0.0

1900 0.0 0.0 0.0 0.0 0.0 1.3 1.6 1.2 0.0 0.0 0.0 0.0 0.0

1930 0.0 0.0 0.0 0.0 0.0 1.7 1.6 2.0 0.0 0.0 0.0 0.0 0.0

2000 0.0 0.0 0.0 0.0 0.0 1.3 2.0 2.5 0.0 0.0 0.0 0.0 0.0

2030 0.0 0.0 0.0 0.0 0.0 1.7 2.1 2.5 0.0 0.0 0.0 0.0 0.0

2100 0.0 0.0 0.0 0.0 0.0 1.7 2.0 2.5 0.5 0.0 0.0 0.0 0.0

2130 0.0 0.0 0.0 0.0 0.0 2.1 1.6 2.5 0.5 0.0 0.0 0.0 0.0

2200 0.0 0.0 0.0 0.0 0.0 2.1 1.6 2.0 0.5 0.0 0.0 0.0 0.0

2230 0.0 0.0 0.0 0.0 0.0 2.1 1.6 2.0 0.9 0.0 0.0 0.0 0.0

2300 0.0 0.0 0.0 0.0 0.0 2.1 1.6 1.6 0.9 0.0 0.0 0.0 0.0

2330 0.0 0.0 0.0 0.0 0.0 2.1 1.6 1.2 0.9 0.0 0.0 0.0 0.0

0000 0.0 0.0 0.0 0.0 0.0 2.1 1.2 1.2 0.9 0.0 0.0 0.0 0.0

0030 0.0 0.0 0.0 0.0 0.0 2.1 1.2 1.2 0.5 0.0 0.0 0.0 0.0

0100 0.0 0.0 0.0 0.0 0.0 1.7 1.2 0.8 0.4 0.0 0.0 0.0 0.0

0130 0.0 0.0 0.0 0.4 0.4 1.7 1.2 0.8 0.4 0.0 0.0 0.0 0.0

0200 0.0 0.0 0.0 0.4 0.4 2.1 1.2 1.2 0.9 0.0 0.0 0.0 0.0

0230 0.0 0.0 0.0 0.0 0.0 2.1 1.6 0.8 0.5 0.0 0.0 0.0 0.0

0300 0.0 0.0 0.0 0.0 0.0 3.4 2.0 1.2 1.3 0.4 0.4 0.0 0.0

0330 0.0 0.0 0.0 0.0 0.0 3.8 2.0 1.2 1.8 0.4 0.0 0.0 0.0

0400 0.0 0.0 0.0 0.0 0.0 3.4 2.0 2.0 1.8 0.0 0.0 0.0 0.0

0430 0.0 0.0 0.0 0.0 0.0 3.3 2.0 1.6 2.2 0.0 0.8 0.0 0.0

0500 0.0 0.0 0.0 0.4 0.4 2.9 1.2 1.2 2.2 0.0 0.4 0.0 0.0

0530 0.0 0.0 0.0 0.4 0.4 3.8 1.2 1.6 1.8 0.0 0.8 0.0 0.0

0600 0.0 0.0 0.0 0.0 0.0 5.0 0.8 1.6 2.8 0.0 0.4 0.0 0.0

0630 0.0 0.0 0.0 0.0 0.0 8.4 1.6 2.5 2.7 0.0 0.0 0.0 0.0

0700 0.0 0.0 0.0 0.0 0.0 7.6 2.0 2.4 3.2 0.0 0.0 0.0 0.0

0730 0.0 0.0 0.0 0.0 0.0 5.8 2.0 3.3 2.3 0.4 0.0 0.0 0.0

0800 0.0 0.0 0.0 0.0 0.0 4.2 2.8 3.2 2.2 0.4 0.0 0.0 0.0

0830 0.0 0.0 0.0 0.0 0.0 4.2 2.4 2.9 1.8 0.4 0.0 0.0 0.0

0900 0.0 0.0 0.0 0.0 0.0 2.1 2.0 2.5 0.9 0.4 0.0 0.0 0.0

0930 0.0 0.0 0.0 0.0 0.0 1.2 2.0 2.4 0.4 0.4 0.0 0.0 0.0

1000 0.0 0.0 0.0 0.0 0.0 0.8 2.0 2.0 0.0 0.0 0.0 0.0 0.0

1030 0.0 0.0 0.0 0.0 0.0 0.8 1.6 1.7 0.0 0.0 0.0 0.0 0.0

1100 0.0 0.0 0.0 0.0 0.0 0.8 1.2 1.2 0.0 0.0 0.0 0.0 0.0

1130 0.0 0.0 0.0 0.0 0.0 0.4 0.8 0.8 0.0 0.0 0.0 0.0 0.0

1200 0.0 0.0 0.0 0.0 0.0 0.4 0.8 0.8 0.0 0.0 0.0 0.0 0.0

1230 0.0 0.0 0.0 0.0 0.0 0.4 0.8 0.4 0.0 0.0 0.0 0.0 0.0

1300 0.0 0.0 0.0 0.0 0.0 0.4 0.8 0.8 0.0 0.0 0.0 0.0 0.0

MEAN 0.0 0.0 0.0 0.0 0.0 2.3 1.5 1.5 0.7 0.1 0.1 0.0 0.0






MOUNTH/


1300 0.0 0.0 0.0 0.0 0.0 1.7 1.6 1.6 0.0 0.4 0.0 0.0 0.0

1330 0.0 0.0 0.0 0.0 0.0 1.3 1.6 2.0 0.0 0.4 0.0 0.0 0.0

1400 0.0 0.0 0.0 0.0 0.0 1.7 1.6 1.6 0.0 0.0 0.0 0.0 0.0

1430 0.0 0.0 0.0 0.0 0.0 1.7 2.0 2.1 0.0 0.0 0.0 0.0 0.0

1500 0.0 0.0 0.0 0.0 0.0 2.1 1.6 2.1 0.0 0.0 0.0 0.0 0.0

1530 0.0 0.0 0.0 0.0 0.0 3.0 2.4 2.1 0.0 0.0 0.0 0.0 0.0

1600 0.0 0.0 0.0 0.0 0.0 2.5 1.6 2.1 0.0 0.0 0.0 0.0 0.0

1630 0.0 0.0 0.0 0.0 0.0 2.5 1.6 1.7 0.0 0.0 0.0 0.0 0.0

1700 0.0 0.0 0.0 0.0 0.0 2.5 1.2 3.3 0.0 0.0 0.0 0.0 0.0

1730 0.0 0.0 0.0 0.0 0.0 3.0 1.7 3.7 0.0 0.4 0.0 0.0 0.0

1800 0.0 0.0 0.0 0.0 0.0 2.9 1.6 4.1 0.0 0.4 0.0 0.0 0.0

1830 0.0 0.0 0.0 0.0 0.0 3.4 2.4 3.8 0.0 0.0 0.0 0.0 0.0

1900 0.0 0.0 0.0 0.0 0.0 3.4 3.3 4.1 0.0 0.0 0.0 0.0 0.0

1930 0.0 0.0 0.0 0.0 0.0 3.8 4.5 4.0 0.0 0.0 0.0 0.0 0.0

2000 0.0 0.0 0.0 0.0 0.4 4.2 4.1 3.7 0.5 0.0 0.0 0.0 0.0

2030 0.0 0.0 0.0 0.0 0.8 3.3 4.5 4.5 1.4 0.0 0.0 0.0 0.0

2100 0.0 0.0 0.0 0.0 0.4 3.8 4.5 3.7 1.4 0.4 0.0 0.0 0.0

2130 0.0 0.0 0.0 0.0 1.2 4.6 4.1 4.1 0.9 0.4 0.0 0.0 0.0

2200 0.0 0.0 0.0 0.0 1.2 4.2 4.1 4.0 1.4 0.8 0.0 0.0 0.0

2230 0.0 0.0 0.0 0.4 1.2 4.6 5.3 4.1 1.8 0.4 0.0 0.0 0.0

2300 0.0 0.0 0.0 0.0 1.2 5.1 5.3 5.3 1.4 0.0 0.0 0.0 0.0

2330 0.0 0.0 0.0 0.0 1.2 5.4 5.3 6.1 1.8 0.4 0.0 0.0 0.0

0000 0.0 0.0 0.0 0.0 0.8 5.0 5.0 6.1 1.4 0.0 0.0 0.0 0.0

0030 0.0 0.0 0.4 0.0 1.2 6.8 4.1 7.1 2.3 0.0 0.0 0.0 0.0

0100 0.0 0.0 0.4 0.4 2.4 7.5 5.0 6.5 2.7 0.0 0.0 0.0 0.0

0130 0.0 0.0 0.8 0.8 2.0 9.7 4.1 6.5 2.2 0.0 0.0 0.0 0.0

0200 0.0 0.0 0.4 0.8 2.5 9.2 4.5 6.1 3.6 0.4 0.0 0.0 0.0

0230 0.0 0.0 0.0 0.8 2.4 8.4 4.5 6.6 2.7 0.4 0.0 0.0 0.0

0300 0.0 0.0 0.4 1.3 2.4 8.0 6.1 5.7 3.1 1.2 1.3 0.0 0.0

0330 0.4 0.4 0.0 1.3 2.0 8.8 6.0 6.5 3.7 1.7 1.3 0.0 0.4

0400 0.4 0.8 0.8 1.7 2.0 9.3 5.3 7.3 4.5 1.2 1.3 0.0 0.4

0430 0.0 0.4 1.2 1.3 3.3 8.8 6.9 7.3 5.8 0.4 1.3 0.0 0.0

0500 0.0 0.0 1.2 1.3 3.6 9.2 6.0 7.7 4.0 1.2 1.7 0.0 0.0

0530 0.0 0.4 2.0 0.8 4.5 11.3 4.9 6.9 4.5 0.8 1.2 0.0 0.0

0600 0.0 0.0 1.2 1.7 4.5 12.1 4.9 6.9 7.1 0.4 0.9 0.0 0.0

0630 0.0 0.0 0.4 1.7 5.7 12.6 7.3 7.5 5.0 0.4 0.4 0.0 0.0

0700 0.0 0.0 0.4 0.8 2.4 11.9 6.1 6.9 6.0 0.8 0.0 0.0 0.0

0730 0.0 0.0 0.0 0.0 0.8 8.3 5.2 6.9 5.0 0.8 0.0 0.0 0.0

0800 0.0 0.0 0.0 0.0 0.4 8.0 5.3 6.1 5.4 0.8 0.0 0.0 0.0

0830 0.0 0.0 0.0 0.0 0.4 6.7 4.9 6.1 2.7 0.4 0.0 0.0 0.0

0900 0.0 0.0 0.0 0.0 0.4 6.3 4.1 5.7 1.4 0.4 0.0 0.0 0.0

0930 0.0 0.0 0.0 0.0 0.0 4.6 4.0 4.1 0.4 0.8 0.0 0.0 0.0

1000 0.0 0.0 0.0 0.0 0.0 3.8 3.3 4.1 0.9 0.8 0.0 0.0 0.0

1030 0.0 0.0 0.0 0.0 0.0 3.4 2.8 3.3 0.5 0.0 0.0 0.0 0.0

1100 0.0 0.0 0.0 0.0 0.0 2.9 2.4 3.3 0.4 0.0 0.0 0.0 0.0

1130 0.0 0.0 0.0 0.0 0.0 1.7 2.4 2.1 0.0 0.0 0.0 0.0 0.0

1200 0.0 0.0 0.0 0.0 0.0 1.3 1.2 1.6 0.0 0.0 0.0 0.0 0.0

1230 0.0 0.0 0.0 0.0 0.0 1.3 1.2 1.2 0.0 0.0 0.0 0.0 0.0

1300 0.0 0.0 0.0 0.0 0.0 1.7 1.6 1.6 0.0 0.4 0.0 0.0 0.0

MEAN 0.0 0.0 0.2 0.3 1.1 5.4 3.8 4.6 1.8 0.4 0.2 0.0 0.0






MOUNTH/


1300 0.0 0.0 0.0 0.0 0.0 2.1 2.4 2.5 0.0 0.4 0.0 0.0 0.0

1330 0.0 0.0 0.0 0.0 0.0 2.1 1.6 2.5 0.0 0.8 0.0 0.0 0.0

1400 0.0 0.0 0.0 0.0 0.0 2.5 2.0 2.0 0.0 0.0 0.0 0.0 0.0

1430 0.0 0.0 0.0 0.0 0.0 2.5 2.9 2.1 0.0 0.4 0.0 0.0 0.0

1500 0.0 0.0 0.0 0.0 0.0 3.3 3.2 3.3 0.0 0.0 0.0 0.0 0.0

1530 0.0 0.0 0.0 0.0 0.0 3.4 2.8 3.3 0.5 0.0 0.0 0.0 0.0

1600 0.0 0.0 0.0 0.0 0.0 3.0 2.0 2.9 0.5 0.0 0.0 0.0 0.0

1630 0.0 0.0 0.0 0.0 0.0 3.4 2.0 2.1 0.5 0.0 0.0 0.0 0.0

1700 0.0 0.0 0.0 0.0 0.0 3.4 2.4 4.1 0.4 0.0 0.0 0.0 0.0

1730 0.0 0.0 0.0 0.0 0.0 3.4 3.3 4.1 0.9 0.4 0.0 0.0 0.0

1800 0.0 0.0 0.0 0.0 0.0 3.3 3.7 4.5 0.5 0.4 0.0 0.0 0.0

1830 0.0 0.0 0.0 0.0 0.0 3.8 4.0 4.6 0.4 0.4 0.0 0.0 0.0

1900 0.0 0.0 0.0 0.0 0.0 3.8 4.5 4.9 0.0 0.0 0.0 0.0 0.0

1930 0.0 0.0 0.0 0.0 0.0 4.2 5.3 5.2 0.0 0.0 0.0 0.0 0.0

2000 0.0 0.0 0.0 0.0 0.8 5.0 6.6 4.9 0.5 0.0 0.0 0.0 0.0

2030 0.0 0.0 0.0 0.0 0.8 4.6 6.6 4.9 1.4 0.4 0.0 0.0 0.0

2100 0.0 0.0 0.0 0.0 0.4 5.0 5.7 4.9 1.4 0.4 0.0 0.0 0.0

2130 0.0 0.0 0.0 0.0 1.2 5.5 6.1 5.3 2.3 0.8 0.0 0.0 0.0

2200 0.0 0.0 0.0 0.0 1.2 4.6 6.5 5.3 1.8 0.8 0.4 0.0 0.0

2230 0.4 0.0 0.0 0.4 1.2 5.9 7.7 6.1 2.7 0.8 0.4 0.0 0.4

2300 0.4 0.0 0.0 0.0 1.2 6.0 8.2 6.9 2.7 0.4 0.0 0.0 0.4

2330 0.4 0.0 0.0 0.0 1.2 6.7 9.3 6.9 2.3 0.4 0.0 0.0 0.4

0000 0.0 0.0 0.0 0.0 1.2 7.5 8.7 8.6 1.8 0.0 0.0 0.0 0.0

0030 0.0 0.0 0.4 0.0 2.0 8.9 7.8 9.5 3.7 0.0 0.0 0.0 0.0

0100 0.0 0.0 0.8 0.4 2.4 9.2 7.5 9.3 4.0 0.0 0.0 0.0 0.0

0130 0.0 0.0 0.8 0.8 2.4 11.3 7.1 8.9 4.0 0.0 0.0 0.0 0.0

0200 0.0 0.0 0.4 0.8 2.5 11.3 7.0 8.2 4.5 0.4 0.4 0.4 0.0

0230 0.0 0.4 1.2 1.3 2.4 11.3 7.8 8.6 4.1 1.2 0.9 0.0 0.0

0300 0.4 0.0 0.8 1.7 2.4 12.2 8.6 8.1 4.5 1.2 2.1 0.0 0.4

0330 0.8 0.4 0.4 1.3 2.4 12.6 7.3 7.7 5.0 1.7 1.3 0.4 0.8

0400 0.4 0.8 0.8 1.7 2.8 12.2 7.7 8.2 5.8 2.0 2.6 0.0 0.4

0430 0.8 0.8 1.6 2.5 4.1 11.7 8.9 9.8 7.1 0.8 2.1 0.4 0.8

0500 0.8 0.4 2.0 2.1 4.5 13.3 8.1 9.7 5.8 1.2 2.1 0.0 0.8

0530 0.0 0.4 2.0 1.3 6.1 15.1 7.7 8.1 6.2 1.6 1.2 0.0 0.0

0600 0.0 0.0 1.2 1.7 5.7 15.1 6.9 9.4 9.0 0.4 0.9 0.0 0.0

0630 0.0 0.0 0.4 1.7 6.5 14.6 8.9 7.9 8.1 1.3 0.4 0.0 0.0

0700 0.0 0.0 0.4 0.8 3.3 13.6 7.3 8.1 8.3 1.2 0.4 0.0 0.0

0730 0.0 0.0 0.0 0.4 2.0 10.0 6.9 8.6 7.2 0.8 0.0 0.0 0.0

0800 0.0 0.0 0.0 0.0 1.2 8.8 7.7 8.5 7.2 0.8 0.0 0.0 0.0

0830 0.0 0.0 0.0 0.0 0.8 7.5 8.1 8.2 4.5 0.4 0.0 0.0 0.0

0900 0.0 0.0 0.0 0.0 0.8 6.7 6.9 7.0 3.2 0.8 0.0 0.0 0.0

0930 0.0 0.0 0.0 0.0 0.4 5.4 5.6 5.7 1.8 0.8 0.0 0.0 0.0

1000 0.0 0.0 0.0 0.0 0.0 4.6 5.7 5.3 1.8 0.8 0.0 0.0 0.0

1030 0.0 0.0 0.0 0.0 0.0 3.4 4.9 4.6 1.4 0.4 0.0 0.0 0.0

1100 0.0 0.0 0.0 0.0 0.0 3.3 4.1 3.7 0.9 0.0 0.0 0.0 0.0

1130 0.0 0.0 0.0 0.0 0.0 3.0 4.0 2.9 0.9 0.0 0.0 0.0 0.0

1200 0.0 0.0 0.0 0.0 0.0 2.5 3.7 2.9 1.4 0.4 0.0 0.0 0.0

1230 0.0 0.0 0.0 0.0 0.0 2.1 2.0 2.5 0.5 0.4 0.0 0.0 0.0

1300 0.0 0.0 0.0 0.0 0.0 2.1 2.4 2.5 0.0 0.4 0.0 0.0 0.0

MEAN 0.1 0.1 0.3 0.4 1.3 6.8 5.7 5.9 2.7 0.5 0.3 0.0 0.1






MOUNTH/


1300 0.0 0.0 0.0 0.0 0.0 3.0 4.0 3.7 0.5 0.4 0.0 0.0 0.0

1330 0.0 0.0 0.0 0.0 0.0 2.9 3.3 4.1 0.9 0.8 0.0 0.0 0.0

1400 0.0 0.0 0.0 0.0 0.0 2.9 2.8 3.3 0.9 0.0 0.0 0.0 0.0

1430 0.0 0.0 0.0 0.0 0.0 3.0 4.5 3.4 0.5 0.4 0.0 0.0 0.0

1500 0.0 0.0 0.0 0.0 0.0 3.3 4.0 3.7 0.4 0.0 0.0 0.0 0.0

1530 0.0 0.0 0.0 0.0 0.0 3.8 3.7 3.3 0.5 0.0 0.0 0.0 0.0

1600 0.0 0.0 0.0 0.0 0.0 3.8 2.8 3.3 0.5 0.0 0.0 0.0 0.0

1630 0.0 0.0 0.0 0.0 0.0 3.8 3.3 2.5 0.5 0.0 0.0 0.0 0.0

1700 0.0 0.0 0.0 0.0 0.0 3.8 3.3 4.6 0.9 0.0 0.0 0.0 0.0

1730 0.0 0.0 0.0 0.0 0.0 3.4 4.5 4.1 0.9 0.4 0.0 0.0 0.0

1800 0.0 0.0 0.0 0.0 0.0 3.3 4.1 5.3 0.5 0.4 0.0 0.0 0.0

1830 0.0 0.0 0.0 0.0 0.0 3.8 4.0 5.0 0.9 0.8 0.0 0.0 0.0

1900 0.0 0.0 0.0 0.0 0.0 5.1 5.7 5.7 0.4 0.4 0.0 0.0 0.0

1930 0.0 0.0 0.0 0.0 0.4 4.6 5.7 5.6 0.0 0.4 0.0 0.0 0.0

2000 0.0 0.0 0.0 0.0 0.8 5.0 6.6 4.9 0.5 0.4 0.0 0.0 0.0

2030 0.0 0.0 0.0 0.4 0.8 5.4 7.0 5.3 1.4 0.4 0.0 0.0 0.0

2100 0.0 0.0 0.0 0.4 0.8 5.4 6.9 5.3 1.8 0.4 0.0 0.0 0.0

2130 0.0 0.0 0.0 0.0 1.2 6.7 7.8 6.6 2.7 0.8 0.0 0.0 0.0

2200 0.0 0.0 0.0 0.0 1.2 5.4 7.3 6.1 2.7 0.8 0.4 0.0 0.0

2230 0.4 0.0 0.0 0.4 1.2 6.7 8.9 6.1 2.7 0.8 0.4 0.0 0.4

2300 0.4 0.0 0.0 0.0 1.2 6.8 9.0 6.9 2.7 0.8 0.0 0.0 0.4

2330 0.4 0.0 0.0 0.0 1.2 7.1 10.6 7.3 2.7 1.2 0.0 0.0 0.4

0000 0.4 0.0 0.0 0.0 1.6 7.9 9.5 9.8 3.2 0.4 0.0 0.0 0.4

0030 0.0 0.0 0.4 0.0 2.4 8.9 9.5 10.0 4.6 0.0 0.4 0.0 0.0

0100 0.0 0.0 0.8 0.8 2.8 9.6 8.7 9.7 5.4 0.0 0.0 0.0 0.0

0130 0.0 0.0 1.2 0.8 2.4 12.6 8.7 10.2 4.9 0.8 0.4 0.0 0.0

0200 0.0 0.0 1.6 0.8 2.9 13.0 8.6 9.8 4.9 1.3 1.3 0.4 0.0

0230 0.0 0.4 1.6 1.3 2.8 13.4 9.4 9.8 5.4 1.2 1.3 0.0 0.0

0300 0.4 0.0 1.6 1.7 2.4 13.0 8.6 9.3 5.8 1.6 2.1 0.0 0.4

0330 0.8 0.4 0.8 1.3 3.7 13.0 8.5 8.5 6.8 1.7 1.7 0.4 0.8

0400 0.4 0.8 0.8 2.1 3.2 13.9 7.7 9.8 7.6 2.0 2.6 0.0 0.4

0430 0.8 0.8 1.6 2.5 4.5 13.3 9.7 10.2 7.6 1.2 3.0 0.4 0.8

0500 0.8 0.4 2.0 2.9 6.1 14.2 9.7 10.5 7.2 1.6 2.6 0.4 0.8

0530 0.0 0.4 2.0 1.7 6.1 16.4 10.1 8.9 7.6 2.0 1.2 0.0 0.0

0600 0.0 0.0 1.7 2.1 6.5 16.3 9.3 9.8 10.4 1.2 0.9 0.0 0.0

0630 0.0 0.0 0.8 1.7 6.5 15.9 9.3 9.2 11.3 1.3 0.4 0.0 0.0

0700 0.0 0.0 0.4 1.3 4.5 14.8 8.9 9.3 9.6 1.2 0.4 0.0 0.0

0730 0.0 0.0 0.0 0.4 2.4 11.7 8.1 10.2 9.0 0.8 0.0 0.0 0.0

0800 0.0 0.0 0.0 0.4 1.6 9.7 9.7 10.5 9.9 1.2 0.0 0.0 0.0

0830 0.0 0.0 0.0 0.0 0.8 8.4 11.0 10.7 8.2 1.2 0.0 0.0 0.0

0900 0.0 0.0 0.0 0.0 0.8 7.6 9.3 8.6 5.5 1.2 0.0 0.0 0.0

0930 0.0 0.0 0.0 0.0 0.8 5.8 8.1 7.8 3.1 1.2 0.0 0.0 0.0

1000 0.0 0.0 0.0 0.0 0.0 5.5 7.8 6.1 3.2 1.2 0.0 0.0 0.0

1030 0.0 0.0 0.0 0.0 0.0 3.8 7.3 5.8 2.3 1.2 0.0 0.0 0.0

1100 0.0 0.0 0.0 0.0 0.0 3.3 6.5 5.7 2.7 0.4 0.0 0.0 0.0

1130 0.0 0.0 0.0 0.0 0.0 3.4 6.5 3.7 2.7 0.0 0.0 0.0 0.0

1200 0.0 0.0 0.0 0.0 0.0 3.4 5.7 3.7 3.2 0.8 0.0 0.0 0.0

1230 0.0 0.0 0.0 0.0 0.0 2.5 5.3 3.3 2.3 0.4 0.0 0.0 0.0

1300 0.0 0.0 0.0 0.0 0.0 3.0 4.0 3.7 0.5 0.4 0.0 0.0 0.0

MEAN 0.1 0.1 0.4 0.5 1.5 7.5 7.1 6.8 3.7 0.8 0.4 0.0 0.1






MOUNTH/


1300 0.0 0.0 0.0 0.0 0.4 5.9 9.7 8.2 8.1 1.2 0.0 0.0 0.0

1330 0.0 0.0 0.0 0.0 0.4 5.9 9.0 8.6 6.4 1.2 0.0 0.0 0.0

1400 0.0 0.0 0.0 0.0 0.4 6.3 8.9 8.6 6.7 0.8 0.0 0.0 0.0

1430 0.0 0.0 0.0 0.0 0.4 6.8 7.8 8.0 5.9 0.8 0.0 0.0 0.0

1500 0.0 0.0 0.0 0.0 0.4 6.7 8.9 8.6 4.0 0.4 0.4 0.0 0.0

1530 0.0 0.0 0.0 0.0 0.0 5.5 6.9 7.9 3.7 0.8 0.4 0.0 0.0

1600 0.0 0.0 0.0 0.0 0.0 5.1 5.3 5.8 3.6 0.8 0.4 0.0 0.0

1630 0.0 0.0 0.0 0.0 0.0 5.1 5.3 5.0 2.3 0.8 0.0 0.0 0.0

1700 0.0 0.0 0.0 0.4 0.4 4.7 4.9 5.8 2.2 0.8 0.0 0.0 0.0

1730 0.0 0.0 0.0 0.4 0.0 4.6 5.4 5.7 1.8 0.8 0.0 0.0 0.0

1800 0.0 0.0 0.0 0.0 0.0 5.0 5.7 5.8 1.9 0.8 0.0 0.0 0.0

1830 0.0 0.4 0.0 0.0 0.4 5.0 6.1 6.2 2.7 0.8 0.0 0.0 0.0

1900 0.0 0.0 0.0 0.0 0.4 6.3 7.4 8.1 2.2 0.8 0.0 0.0 0.0

1930 0.0 0.0 0.0 0.0 0.4 6.7 7.3 9.7 4.1 0.8 0.0 0.0 0.0

2000 0.0 0.0 0.0 0.0 0.8 6.7 9.4 8.2 6.4 0.4 0.0 0.0 0.0

2030 0.0 0.0 0.0 0.4 0.8 7.9 10.3 8.6 7.3 0.4 0.0 0.0 0.0

2100 0.0 0.0 0.0 0.4 1.2 7.5 10.2 8.6 7.8 0.4 0.0 0.0 0.0

2130 0.0 0.0 0.0 0.4 1.2 8.4 10.7 7.4 7.8 0.8 0.0 0.0 0.0

2200 0.0 0.0 0.0 0.4 1.2 7.9 10.2 8.5 7.7 0.8 0.4 0.0 0.0

2230 0.4 0.0 0.0 0.4 1.2 8.8 12.2 10.7 9.5 0.8 0.4 0.0 0.4

2300 0.4 0.0 0.0 0.0 1.2 9.4 13.5 10.5 7.7 0.8 0.0 0.0 0.4

2330 0.4 0.0 0.0 0.0 1.6 10.0 13.8 10.1 8.6 1.6 0.4 0.0 0.4

0000 0.4 0.0 0.0 0.4 2.4 10.5 14.5 12.3 8.7 1.7 0.4 0.0 0.4

0030 0.4 0.0 0.4 0.8 4.0 12.2 13.6 13.7 7.4 1.3 0.8 0.4 0.4

0100 0.4 0.0 0.8 1.3 3.6 13.4 12.4 13.4 8.5 0.8 0.8 0.0 0.4

0130 0.4 0.0 1.2 1.7 4.1 14.7 12.4 13.8 8.5 1.7 1.3 0.0 0.4

0200 0.4 0.0 2.4 1.3 4.1 15.1 13.1 15.1 7.6 2.1 2.1 1.2 0.4

0230 0.8 0.4 2.0 1.7 4.5 16.4 13.1 13.9 6.8 2.1 2.1 0.4 0.8

0300 0.8 0.4 1.6 2.5 4.5 17.2 11.9 12.6 7.6 3.3 2.5 0.4 0.8

0330 1.3 0.4 1.2 2.5 4.9 17.6 11.3 12.2 7.8 2.1 2.6 2.0 1.3

0400 1.7 1.2 1.6 3.4 5.3 17.3 13.8 12.7 11.6 2.4 3.9 1.2 1.7

0430 0.8 0.8 1.6 4.2 6.1 17.1 13.3 13.4 11.6 2.8 4.2 0.8 0.8

0500 0.8 0.8 2.4 3.8 9.3 17.9 14.5 13.0 11.2 3.3 4.3 1.6 0.8

0530 0.8 0.4 2.0 2.1 10.2 21.8 14.2 12.6 12.9 4.9 3.3 0.8 0.8

0600 0.4 0.4 2.5 2.1 10.5 24.3 15.4 13.1 17.5 4.5 2.1 0.0 0.4

0630 0.0 0.0 1.6 1.7 10.5 24.3 19.4 17.2 19.5 5.0 0.9 0.0 0.0

0700 0.0 0.0 0.4 1.7 7.8 22.0 17.9 18.2 20.6 3.7 0.4 0.0 0.0

0730 0.0 0.0 0.4 1.3 5.7 18.8 18.1 20.4 19.0 3.3 0.0 0.0 0.0

0800 0.0 0.0 0.0 0.4 3.7 15.1 19.0 19.4 18.8 3.3 0.0 0.0 0.0

0830 0.0 0.0 0.0 0.0 2.8 12.6 16.7 18.9 17.7 2.9 0.0 0.0 0.0

0900 0.0 0.0 0.0 0.0 2.0 12.6 15.4 16.0 16.1 1.2 0.0 0.0 0.0

0930 0.0 0.0 0.0 0.0 2.4 9.6 13.3 16.3 13.5 1.6 0.0 0.0 0.0

1000 0.0 0.0 0.0 0.0 1.6 7.6 13.1 12.3 11.3 1.6 0.0 0.0 0.0

1030 0.0 0.0 0.0 0.0 0.4 7.1 13.0 12.4 11.3 1.7 0.0 0.0 0.0

1100 0.0 0.0 0.0 0.0 0.4 5.4 12.2 12.3 11.7 1.7 0.0 0.0 0.0

1130 0.0 0.0 0.0 0.0 0.4 5.5 10.5 10.3 11.2 1.2 0.0 0.0 0.0

1200 0.0 0.0 0.0 0.0 0.4 5.5 9.8 9.4 9.5 1.2 0.0 0.0 0.0

1230 0.0 0.0 0.0 0.0 0.4 5.0 9.8 9.6 8.3 0.8 0.0 0.0 0.0

1300 0.0 0.0 0.0 0.0 0.4 5.9 9.7 8.2 8.1 1.2 0.0 0.0 0.0

MEAN 0.2 0.1 0.5 0.7 2.6 10.7 11.5 11.2 9.1 1.7 0.7 0.2 0.2






MOUNTH/


1300 0.4 0.0 0.0 0.0 2.4 11.0 20.6 16.8 18.0 2.9 0.0 0.0 0.4

1330 0.0 0.0 0.0 0.9 2.4 11.8 21.3 17.2 17.7 2.5 0.4 0.4 0.0

1400 0.0 0.0 0.0 0.0 2.8 12.2 19.9 17.6 20.2 1.6 0.4 0.4 0.0

1430 0.0 0.0 0.0 0.0 2.4 12.3 20.0 19.8 19.6 1.2 0.4 0.4 0.0

1500 0.0 0.0 0.0 0.0 2.8 14.2 21.5 21.0 19.3 2.4 0.4 0.4 0.0

1530 0.0 0.0 0.0 0.0 2.8 12.2 18.3 21.3 18.9 2.9 0.4 0.4 0.0

1600 0.4 0.0 0.0 0.0 2.0 8.9 15.0 14.8 18.5 3.3 0.4 0.4 0.4

1630 0.0 0.0 0.0 0.0 1.6 9.7 15.1 13.3 14.4 3.3 0.8 0.8 0.0

1700 0.0 0.0 0.0 0.4 1.2 8.1 14.3 13.7 11.7 3.3 0.8 0.8 0.0

1730 0.0 0.0 0.0 0.4 1.2 9.7 14.9 13.8 10.4 3.3 1.7 1.7 0.0

1800 0.0 0.0 0.0 0.0 0.8 10.5 15.6 15.2 11.4 2.9 1.3 1.3 0.0

1830 0.0 0.4 0.0 0.0 0.4 12.2 15.0 17.5 10.7 2.5 1.3 1.3 0.0

1900 0.0 0.0 0.0 0.0 1.2 13.1 14.8 17.9 11.2 2.0 0.8 0.8 0.0

1930 0.0 0.0 0.0 0.0 1.2 13.0 15.0 17.3 10.9 2.0 0.8 0.8 0.0

2000 0.0 0.4 0.0 0.0 2.0 13.0 13.9 16.5 12.8 2.1 0.4 0.4 0.0

2030 0.0 0.0 0.4 0.4 2.4 15.5 15.2 18.9 14.5 2.5 1.3 1.3 0.0

2100 0.0 0.0 0.0 0.4 2.0 15.9 15.9 19.3 16.4 1.6 0.9 0.9 0.0

2130 0.0 0.0 0.0 0.4 2.4 17.2 18.9 18.1 16.4 1.3 0.0 0.0 0.0

2200 0.0 0.0 0.0 0.4 3.3 17.2 21.6 21.9 15.8 2.0 1.3 1.3 0.0

2230 0.4 0.0 0.0 0.4 4.1 17.2 20.3 23.4 17.7 2.1 1.3 1.3 0.4

2300 0.4 0.0 0.0 0.0 5.8 18.3 22.5 22.3 18.2 2.9 1.3 1.3 0.4

2330 0.8 0.0 0.0 0.4 6.1 18.4 23.2 22.7 19.0 4.1 1.3 1.3 0.8

0000 0.9 0.4 0.4 0.8 6.9 18.4 24.4 24.2 19.7 5.0 1.7 1.7 0.9

0030 1.2 0.0 0.8 2.5 7.7 21.1 24.3 23.2 21.7 5.0 1.7 1.7 1.2

0100 0.8 0.4 2.0 2.1 7.7 23.0 25.7 23.5 19.3 5.4 2.1 2.1 0.8

0130 0.8 0.4 2.0 2.5 7.7 24.8 24.1 24.4 20.6 5.4 2.6 2.6 0.8

0200 1.3 0.4 2.8 2.9 9.0 25.2 23.0 24.9 20.2 4.7 3.4 3.4 1.3

0230 1.2 0.8 2.8 3.8 8.9 25.2 22.1 23.8 20.3 4.6 3.4 3.4 1.2

0300 2.1 1.6 2.4 4.6 10.2 25.2 22.1 23.1 19.6 4.5 5.0 5.0 2.1

0330 2.5 2.0 3.6 5.9 10.6 27.6 21.8 22.8 19.6 4.6 5.6 5.6 2.5

0400 2.5 3.2 4.0 5.5 11.7 28.3 21.9 22.9 20.1 5.3 7.7 7.7 2.5

0430 1.7 2.0 4.0 8.4 14.3 28.8 21.4 22.0 20.9 6.5 8.4 8.4 1.7

0500 2.1 1.2 4.1 9.2 20.2 26.2 22.6 21.5 21.1 8.6 8.9 8.9 2.1

0530 0.8 1.2 4.0 7.2 20.0 30.3 23.1 21.5 22.8 10.5 7.5 7.5 0.8

0600 0.8 0.4 4.2 5.5 19.8 34.7 26.0 25.7 29.9 11.5 6.0 6.0 0.8

0630 0.4 0.4 3.2 4.2 18.2 34.3 34.4 32.6 33.5 13.9 4.3 4.3 0.4

0700 0.8 0.0 2.0 2.9 15.9 33.5 35.0 35.6 31.2 9.8 4.2 4.2 0.8

0730 0.4 0.0 1.6 2.5 12.2 30.0 36.3 35.5 33.0 8.5 3.4 3.4 0.4

0800 0.0 0.0 1.2 2.1 9.8 25.2 34.4 34.8 30.9 7.4 1.7 1.7 0.0

0830 0.0 0.0 0.4 1.3 6.1 22.2 31.7 32.0 29.5 7.8 1.3 1.3 0.0

0900 0.4 0.0 0.0 0.4 6.5 19.7 29.3 30.3 30.9 5.3 1.3 1.3 0.4

0930 0.0 0.0 0.0 0.9 4.9 17.5 29.4 26.9 27.8 4.5 0.4 0.4 0.0

1000 0.4 0.0 0.0 0.0 4.1 14.7 25.7 25.4 25.2 3.7 0.4 0.4 0.4

1030 0.4 0.0 0.0 0.0 3.7 13.0 24.0 25.7 22.5 3.3 0.4 0.4 0.4

1100 0.4 0.0 0.0 0.4 3.7 11.3 22.4 23.8 22.4 2.9 0.4 0.4 0.4

1130 0.0 0.0 0.0 0.0 3.2 11.0 21.1 21.5 21.5 2.9 0.4 0.4 0.0

1200 0.0 0.0 0.0 0.8 2.0 10.1 19.1 18.9 21.3 2.9 0.0 0.0 0.0

1230 0.4 0.0 0.0 0.0 1.6 10.0 21.2 18.8 19.7 2.1 0.0 0.0 0.4

1300 0.4 0.0 0.0 0.0 2.4 11.0 20.6 16.8 18.0 2.9 0.0 0.0 0.4

MEAN 0.5 0.3 1.0 1.7 6.2 18.4 22.1 22.2 20.2 4.4 2.1 2.1 0.5






MOUNTH/


1300 0.4 0.0 0.0 0.4 5.3 18.1 33.2 30.7 24.8 5.7 0.9 0.0 0.4

1330 0.4 0.0 0.0 0.9 6.1 18.5 32.4 27.9 25.5 5.3 1.7 0.8 0.4

1400 0.4 0.4 0.4 0.8 6.5 18.1 33.3 29.1 25.6 4.9 1.3 0.8 0.4

1430 0.8 0.0 0.4 0.4 7.3 19.9 34.3 30.4 26.0 4.9 2.5 0.4 0.8

1500 1.7 0.0 0.4 0.4 8.1 20.9 37.7 30.9 27.4 5.3 0.4 0.4 1.7

1530 1.7 0.4 0.8 0.4 8.1 21.9 35.0 32.2 27.2 5.4 0.4 0.4 1.7

1600 2.5 0.0 0.8 1.3 8.1 17.4 28.5 29.2 31.5 5.8 1.3 0.4 2.5

1630 1.3 0.4 0.8 2.5 6.1 16.9 26.9 25.3 29.7 5.7 2.5 0.4 1.3

1700 1.2 0.4 0.8 2.1 5.7 16.5 28.2 24.9 24.2 4.9 2.5 0.0 1.2

1730 1.7 0.0 0.4 0.8 6.5 18.1 28.1 25.6 23.4 5.7 3.0 0.8 1.7

1800 1.3 0.0 0.8 0.8 6.1 20.9 27.9 25.5 25.7 4.1 3.0 2.0 1.3

1830 0.4 0.8 0.8 0.8 7.3 21.4 28.3 29.2 23.7 4.5 3.0 2.0 0.4

1900 0.0 0.0 1.2 0.8 6.5 21.9 29.5 31.3 24.2 4.9 2.1 2.0 0.0

1930 0.0 0.4 0.8 0.8 5.7 21.8 30.1 31.9 25.0 4.5 2.1 1.2 0.0

2000 0.0 0.4 0.8 0.8 5.7 24.8 31.1 31.7 25.2 4.9 1.7 1.2 0.0

2030 0.0 0.0 1.6 1.3 6.5 24.3 31.3 32.5 29.5 5.3 2.6 0.8 0.0

2100 0.0 0.0 1.2 1.2 7.7 24.3 33.3 31.3 30.1 6.1 2.6 0.8 0.0

2130 0.4 0.0 1.2 1.7 9.3 26.1 36.5 30.9 31.5 5.5 2.5 1.2 0.4

2200 0.0 0.0 0.4 1.3 10.2 25.9 38.8 33.2 32.6 6.6 3.0 1.2 0.0

2230 0.4 0.0 0.4 1.7 11.4 27.2 39.0 32.4 32.7 7.9 2.5 2.1 0.4

2300 0.4 0.0 1.2 1.7 12.3 26.8 36.5 33.2 33.6 8.3 3.0 2.0 0.4

2330 1.3 0.4 0.8 2.1 11.8 27.2 37.8 34.4 33.0 8.2 3.8 2.0 1.3

0000 1.3 0.4 0.8 2.9 12.7 28.0 39.3 36.9 31.7 8.7 4.2 2.0 1.3

0030 1.7 1.2 2.0 3.8 11.7 27.8 39.1 35.7 34.1 10.5 5.1 2.0 1.7

0100 1.2 1.2 3.2 3.8 13.8 28.9 39.4 34.8 34.1 9.6 5.5 2.4 1.2

0130 1.3 0.8 2.8 4.2 15.0 30.7 39.4 36.2 35.4 10.0 6.5 2.9 1.3

0200 2.1 2.0 3.7 5.5 16.0 30.7 36.9 35.5 34.5 9.3 8.1 3.3 2.1

0230 2.1 1.6 4.8 7.5 17.4 31.1 37.3 34.8 34.7 10.0 8.9 3.3 2.1

0300 6.2 4.5 5.3 9.6 19.1 33.2 36.9 35.6 33.9 11.5 9.2 4.5 6.2

0330 6.3 8.5 6.5 9.7 19.5 34.7 35.9 36.6 32.9 11.6 10.3 6.5 6.3

0400 5.4 9.3 9.3 9.8 21.1 35.0 34.4 36.3 34.4 11.4 13.7 7.8 5.4

0430 6.7 7.7 11.3 17.3 23.7 34.2 35.1 36.2 33.8 12.6 14.8 9.3 6.7

0500 5.9 6.0 8.9 18.1 30.4 35.0 35.5 34.4 35.4 16.8 16.2 8.2 5.9

0530 3.8 3.6 7.3 17.3 34.7 38.7 35.2 33.7 37.1 19.4 13.3 6.1 3.8

0600 3.0 2.0 7.1 16.0 34.0 41.0 38.6 36.3 41.7 19.7 11.2 4.5 3.0

0630 2.5 0.4 6.9 11.3 31.2 42.3 42.9 43.5 45.2 21.8 8.1 2.4 2.5

0700 2.9 0.4 4.9 5.9 26.9 39.8 45.5 44.5 44.5 19.3 7.2 2.0 2.9

0730 2.1 0.0 3.2 5.9 22.8 37.9 44.4 44.9 44.8 15.9 6.3 1.2 2.1

0800 1.7 0.0 1.6 4.7 22.0 36.1 45.7 45.3 44.4 11.5 5.5 1.6 1.7

0830 1.7 0.0 2.4 3.4 19.4 33.9 44.7 43.4 44.1 10.7 3.4 0.8 1.7

0900 1.3 0.0 1.2 2.5 14.5 29.8 41.5 41.0 41.5 10.2 2.2 0.8 1.3

0930 0.8 0.0 0.8 2.6 12.7 25.4 41.1 38.8 40.8 7.7 2.1 1.2 0.8

1000 0.4 0.0 0.4 1.3 10.2 23.5 38.4 37.3 37.4 7.4 2.1 0.8 0.4

1030 0.4 0.0 0.8 1.7 9.1 21.8 35.0 34.9 36.5 7.1 1.7 0.8 0.4

1100 0.4 0.0 1.2 0.9 7.3 20.5 35.0 33.2 31.8 5.4 2.6 0.8 0.4

1130 0.0 0.0 0.8 0.8 6.5 19.4 33.2 31.4 29.6 4.9 2.1 0.8 0.0

1200 0.8 0.0 0.4 1.3 6.0 18.1 32.9 31.1 29.0 6.1 1.3 0.0 0.8

1230 1.2 0.0 0.4 0.9 6.1 18.0 32.2 30.0 26.6 5.9 0.9 0.4 1.2

1300 0.4 0.0 0.0 0.4 5.3 18.1 33.2 30.7 24.8 5.7 0.9 0.0 0.4

MEAN 1.7 1.1 2.4 4.0 13.2 26.6 35.7 33.9 32.5 8.7 4.6 2.1 1.7





Table 45. Frequency of visibility < 8000 m (based on ICAO Model B)

MOUNTH/


1300 1.7 0.0 0.8 2.5 13.8 25.7 43.7 44.3 36.5 11.4 3.4 2.0 1.7

1330 2.1 0.8 1.6 2.1 12.7 25.6 43.9 44.7 36.4 11.5 5.1 1.6 2.1

1400 1.7 0.8 0.8 1.3 13.8 26.5 43.5 43.4 36.3 10.2 3.4 1.6 1.7

1430 1.3 0.8 0.8 1.7 13.8 29.2 45.7 45.1 37.0 9.8 4.2 0.8 1.3

1500 2.1 0.4 0.8 2.1 14.1 33.5 50.2 44.4 37.7 10.5 4.7 2.4 2.1

1530 2.1 0.8 1.2 2.5 15.4 35.9 50.0 50.2 39.6 10.0 3.0 2.0 2.1

1600 4.2 0.8 1.6 3.0 18.2 31.8 46.3 48.6 42.8 10.7 4.2 2.4 4.2

1630 2.5 1.2 2.0 5.0 16.3 31.4 47.8 44.0 45.0 13.5 5.1 3.3 2.5

1700 2.9 1.6 2.5 4.2 17.1 31.4 48.6 43.6 41.7 13.1 4.7 2.9 2.9

1730 2.5 2.0 2.4 4.2 16.7 32.1 47.9 43.5 39.6 10.2 5.9 3.3 2.5

1800 2.5 1.2 2.1 2.5 17.2 33.1 48.8 45.7 41.9 9.0 4.2 6.5 2.5

1830 3.3 1.6 2.0 3.0 18.7 33.2 49.4 47.5 39.7 8.6 4.2 5.7 3.3

1900 1.7 0.8 1.6 2.5 18.7 34.2 47.5 45.5 44.4 10.6 3.8 4.5 1.7

1930 2.1 1.2 2.0 2.1 18.8 34.5 49.2 47.2 45.0 12.7 4.6 4.5 2.1

2000 1.7 1.2 2.0 1.7 19.1 33.2 50.0 47.7 44.5 14.0 4.2 4.5 1.7

2030 0.8 0.4 3.6 2.5 20.3 33.5 51.4 49.0 43.6 13.5 4.7 3.2 0.8

2100 0.8 0.8 3.7 2.5 20.6 34.7 52.0 47.3 45.7 14.6 5.1 3.2 0.8

2130 1.7 0.4 4.1 3.0 20.2 37.0 53.7 47.3 44.3 15.1 4.6 3.3 1.7

2200 1.3 0.8 2.9 3.8 18.7 36.0 53.5 47.4 48.0 15.2 5.5 3.7 1.3

2230 2.5 2.8 4.1 5.9 20.3 36.4 54.1 47.1 47.3 16.2 6.3 2.5 2.5

2300 2.1 2.4 4.5 6.7 21.0 36.2 52.9 49.0 45.5 17.1 7.2 3.7 2.1

2330 2.1 2.8 3.7 6.8 22.0 36.8 53.3 48.2 44.3 16.0 7.7 3.7 2.1

0000 2.6 3.6 5.0 6.7 22.4 36.0 52.9 50.8 45.9 18.7 8.5 4.1 2.6

0030 3.3 4.0 4.5 7.9 23.9 35.4 52.7 49.4 46.1 19.7 9.3 3.7 3.3

0100 3.3 4.9 5.3 11.8 24.3 36.4 52.3 49.4 46.2 20.1 11.0 4.5 3.3

0130 4.2 4.5 5.3 12.2 24.8 36.6 50.6 48.0 47.1 20.3 11.2 5.3 4.2

0200 6.3 6.9 7.3 14.3 25.4 37.8 50.8 46.1 46.6 21.6 11.5 4.9 6.3

0230 6.7 8.1 8.1 15.5 27.9 37.0 52.5 45.5 46.8 20.3 12.8 7.8 6.7

0300 12.9 12.7 10.1 16.3 29.3 39.5 54.9 47.4 45.5 19.8 14.6 11.0 12.9

0330 15.9 17.8 13.8 17.2 30.1 39.7 53.6 47.2 44.7 19.5 16.2 15.4 15.9

0400 15.4 15.3 19.0 20.4 31.2 40.5 52.6 47.3 46.4 21.2 20.6 17.2 15.4

0430 13.8 14.5 19.4 28.3 35.5 39.6 52.0 47.6 46.2 22.8 23.6 17.0 13.8

0500 12.2 11.7 17.9 30.7 41.3 40.8 50.0 46.6 48.0 30.7 24.7 16.4 12.2

0530 9.6 10.1 15.0 29.1 45.7 44.5 47.8 45.1 50.4 33.6 22.9 13.5 9.6

0600 8.0 7.7 12.5 28.2 49.0 49.0 50.8 44.5 53.1 33.2 19.3 8.6 8.0

0630 7.1 6.5 10.1 25.9 48.6 49.8 57.9 53.1 56.1 31.9 15.7 6.9 7.1

0700 8.8 6.1 8.2 19.7 42.0 47.9 57.7 54.3 56.9 31.1 15.3 7.3 8.8

0730 6.7 2.8 7.7 17.6 35.8 47.1 56.9 54.7 57.0 28.5 12.2 4.5 6.7

0800 5.8 1.2 6.1 12.7 34.3 44.5 57.9 56.3 56.5 23.8 9.3 4.1 5.8

0830 4.2 0.0 5.7 9.7 31.2 43.1 58.9 57.8 55.5 20.5 8.4 2.8 4.2

0900 3.0 0.0 4.5 8.5 28.2 39.5 56.1 56.1 55.3 18.4 5.7 2.0 3.0

0930 2.1 0.4 2.8 8.5 24.5 40.0 54.4 53.9 52.0 15.9 6.0 2.0 2.1

1000 2.5 0.0 3.2 5.1 20.4 37.0 51.8 53.3 51.4 14.0 5.1 2.4 2.5

1030 2.1 0.4 3.7 5.1 18.9 33.2 48.0 51.5 49.1 13.3 5.0 2.1 2.1

1100 2.5 0.4 2.1 6.0 18.8 30.5 46.7 48.8 44.8 12.9 4.7 2.5 2.5

1130 1.7 0.8 2.0 3.8 18.1 28.7 47.0 46.3 43.9 12.8 4.7 2.8 1.7

1200 1.7 0.4 1.2 3.0 16.1 25.7 44.3 44.3 40.3 11.5 4.3 1.6 1.7

1230 2.9 0.0 1.6 3.4 15.6 26.4 43.3 43.8 39.0 12.6 4.3 2.4 2.9

1300 1.7 0.0 0.8 2.5 13.8 25.7 43.7 44.3 36.5 11.4 3.4 2.0 1.7

MEAN 4.4 3.5 5.3 9.2 24.0 36.0 50.8 48.1 45.8 17.1 8.6 5.1 4.4





2.4.2 Ceiling and vertical visibility

Clouds visually illustrate thermodynamic processes i.e. events in the lower atmosphere layer – troposphere. Based on the appearance and height of the cloud formation, it is possible to evaluate atmosphere stability and motions within it. Clouds may cause flight path disturbance when they are vertically developed, when covering large areas and when formed at low altitudes. Lower base of the lowest layer of clouds is theoretically regarded as a condensation level which does not entirely correlate with the conditions in the atmosphere. Abrupt reducing of visibility doesn’t take place at the height of the cloud base, but visibility gradually reduces in a so-called transitional layer. In weather situations, when sky is not visible due to the thick fog, blizzard, dust storm etc, vertical visibility is provided in meteorological reports. Vertical visibility refers to the vertical distance between the aerodrome reference height and lower base of the meteorological phenomena that makes sky not visible. Vertical visibility is measured instrumentally. Tables 46 – 57 show relative frequencies (%) of the ceiling, including vertical visibility less than defined values at times per months. Tables 58 – 63 show relative frequency (%) of the ceiling. In the calculation of relative frequency, data on vertical visibility are included. Low values of the height of base of the lowest clouds or vertical visibility occur most often in winter or late autumn months, overnight and morning, after sunrise. Heights are less than 1500 ft, in winter and autumn, overnight and morning, in 20-25% of cases, whilst in summer and spring months, relative frequency is 5-10%. In the summer, at certain times, there were no registered heights less than 1500ft, for instance, in July, from 1000UTC, from 1400 -1700UTC and 1830 -1930UTC. Low cloudiness prevails during winter and autumn months, covering more than half of the sky, as well as meteorological phenomena that make sky not visible. Cloudiness in that time of year is mostly in the form of stratus, stratocumulus and nimbostratus with low base due to the weak convection. Following the stronger warming of the ground in summer and spring months, and stronger convective motions as well as air mixing, relative frequency of the occurrence of low cloud base is considerably lower relative to the winter and autumn months. Additionally, overnight and in the morning right after sunrise, the ground is coolest due to the radiation or cold air advections, hence relative frequency of low heights of the lowest layer of clouds at those times is highest.




Table 46. Frequency of the height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times – January (ICAO Model C)

MODEL C

AERODROME: LYBE MONTH: I

TOTAL NUMBER OF OBSERVATIONS: 138528

LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

<100 <200 <300 <500 <1 000 <1 500 0000 0.0 3.7 9.4 15.2 18.9 23.0

0030 0.0 3.7 9.5 15.4 18.3 23.2

0100 0.0 2.8 8.9 15.0 17.8 23.1

0130 0.0 3.3 8.9 13.4 16.3 22.0

0200 0.0 4.5 9.4 13.5 17.6 22.9

0230 0.0 5.3 9.8 13.1 17.6 23.0

0300 0.0 4.0 8.9 12.6 18.2 22.7

0330 0.0 3.3 9.3 12.2 17.9 22.4

0400 0.0 3.3 9.0 11.8 16.7 20.8

0430 0.0 3.7 8.9 12.2 18.7 22.0

0500 0.0 4.0 8.9 13.0 19.0 23.1

0530 0.0 3.7 9.3 12.6 19.1 22.0

0600 0.0 3.7 9.0 12.7 19.2 20.8

0630 0.0 4.2 9.2 11.3 16.7 19.7

0700 0.0 4.0 7.7 13.0 17.4 20.6

0730 0.0 2.9 6.9 13.1 18.8 21.2

0800 0.0 3.6 8.5 14.2 19.4 21.1

0830 0.0 3.3 7.8 13.1 18.9 20.1

0900 0.0 1.6 5.7 12.7 18.9 19.3

0930 0.0 1.2 4.9 10.2 15.9 18.0

1000 0.0 1.2 4.1 9.4 16.8 20.9

1030 0.0 0.8 3.3 10.0 16.2 19.9

1100 0.0 0.8 2.9 9.4 16.0 19.7

1130 0.0 0.8 2.5 7.0 12.8 16.5

1200 0.0 1.2 2.9 7.0 13.1 18.4

1230 0.0 0.0 2.1 5.0 12.1 17.1

1300 0.0 0.0 1.6 4.5 11.5 15.6

1330 0.0 0.4 2.0 5.3 11.9 14.3

1400 0.0 0.4 2.0 5.7 12.7 15.2

1430 0.0 0.8 2.5 5.9 13.1 15.6

1500 0.0 0.8 2.9 5.8 11.9 16.5

1530 0.0 1.7 2.9 6.7 12.6 17.2

1600 0.0 1.6 4.1 7.0 12.3 16.0

1630 0.0 1.7 3.3 5.4 12.0 14.9

1700 0.0 1.2 4.1 6.6 10.4 13.3

1730 0.0 1.6 5.3 8.1 13.0 15.0

1800 0.0 2.1 5.3 7.8 13.6 15.6

1830 0.0 2.5 6.3 9.2 13.8 16.7

1900 0.0 2.4 5.3 8.1 12.6 15.9

1930 0.0 3.2 6.9 9.7 14.5 18.5

2000 0.0 3.7 5.3 8.6 13.6 17.3

2030 0.0 3.3 5.8 9.5 13.6 17.7

2100 0.0 2.9 5.3 8.6 12.8 17.3

2130 0.0 2.1 4.5 9.9 13.2 17.7

2200 0.0 3.2 5.7 11.3 15.8 19.0

2230 0.0 4.1 7.4 11.5 15.6 19.7

2300 0.0 4.5 7.7 13.0 16.6 21.12330 0.0 4.0 8.1 13.4 17.0 21.9

MEAN 0.0 2.6 6.1 10.2 15.5 19.1

Remarks*Vertica l vis ibi l i ty data icluded




Hs*

FREQUENCIES (%) OF THE HEIGHT OF THE BASE (ft) OF THE LOWEST CLOUD LAYER OF BKN OR OVC (ft) EXTENT

BELOW SPECIFIED VALUES AT SPECIFIED TIMES

TIME (UTC)




Table 47. Frequency of the height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times – February (ICAO Model C)

MODEL C

AERODROME: LYBE MONTH: II



<100 <200 <300 <500 <1 000 <1 500 0000 0.0 0.9 2.3 5.0 7.8 11.5

0030 0.0 0.9 2.8 5.5 8.3 12.0

0100 0.0 0.4 2.7 6.7 9.0 13.9

0130 0.0 0.4 3.6 6.7 8.5 13.5

0200 0.0 1.3 4.0 7.2 9.9 15.2

0230 0.0 0.9 3.6 6.8 9.5 14.9

0300 0.0 1.3 4.0 7.6 10.3 14.7

0330 0.0 1.4 4.1 6.8 9.6 13.2

0400 0.0 1.3 3.6 6.3 10.3 12.9

0430 0.0 1.3 3.1 5.8 9.3 13.3

0500 0.0 1.3 3.1 7.2 11.2 14.8

0530 0.0 1.8 3.6 7.1 10.7 14.3

0600 0.0 1.9 4.7 7.6 12.3 15.6

0630 0.0 1.4 3.2 7.2 12.7 15.4

0700 0.0 1.4 4.1 7.3 13.3 15.6

0730 0.0 1.4 3.6 7.7 13.6 14.9

0800 0.0 0.9 4.5 7.2 11.7 13.9

0830 0.0 1.8 2.7 7.3 14.1 16.4

0900 0.0 0.9 1.8 6.0 12.4 14.7

0930 0.0 0.9 1.8 5.4 13.5 14.8

1000 0.0 0.0 0.9 4.1 10.4 14.4

1030 0.0 0.0 0.5 4.1 10.4 14.9

1100 0.0 0.0 0.4 4.0 10.8 13.0

1130 0.0 0.0 0.4 4.0 11.2 12.6

1200 0.0 0.0 0.0 4.1 9.0 12.2

1230 0.0 0.0 0.0 2.3 8.3 12.8

1300 0.0 0.0 0.0 1.4 6.8 11.3

1330 0.0 0.0 0.0 0.9 6.8 11.4

1400 0.0 0.0 0.0 0.9 7.6 11.7

1430 0.0 0.0 0.0 1.4 7.3 10.0

1500 0.0 0.0 0.0 1.3 8.1 10.8

1530 0.0 0.0 0.0 1.4 8.3 12.0

1600 0.0 0.0 0.5 1.8 9.9 12.2

1630 0.0 0.0 0.9 3.6 9.5 12.6

1700 0.0 0.4 0.9 3.6 8.1 9.9

1730 0.0 0.5 0.9 2.7 8.1 10.8

1800 0.0 0.5 1.0 3.8 7.6 11.4

1830 0.0 0.9 1.3 3.1 7.1 10.7

1900 0.0 0.4 1.3 3.1 8.5 11.2

1930 0.0 0.5 1.4 2.7 6.8 9.5

2000 0.0 0.5 0.9 2.8 7.3 10.1

2030 0.0 0.5 2.7 4.1 7.7 11.4

2100 0.0 0.5 1.8 3.7 6.8 10.5

2130 0.0 0.5 1.8 3.2 6.4 9.6

2200 0.0 0.5 1.8 3.6 5.4 8.6

2230 0.0 0.9 2.7 4.1 5.5 10.0

2300 0.0 0.5 2.7 5.0 6.8 10.52330 0.0 0.9 2.7 5.4 7.7 10.9

MEAN 0.0 0.7 2.0 4.6 9.2 12.5





TIME (UTC) Hs*






Table 48. Frequency of the height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times – March (ICAO Model C)

MODEL C

AERODROME: LYBE MONTH: III



<100 <200 <300 <500 <1 000 <1 500 0000 0.4 0.8 1.2 2.1 3.7 3.7

0030 0.0 0.4 0.8 2.1 3.8 4.6

0100 0.0 0.0 0.4 1.7 3.8 4.2

0130 0.0 0.0 0.4 2.5 4.1 4.6

0200 0.0 0.0 0.4 2.1 4.2 4.2

0230 0.0 0.0 0.8 2.5 4.6 5.0

0300 0.0 0.0 0.8 2.5 4.1 5.3

0330 0.0 0.0 0.8 2.9 5.4 6.6

0400 0.0 0.0 0.8 3.3 6.1 7.3

0430 0.0 0.0 0.8 3.3 6.5 7.7

0500 0.0 0.0 0.8 2.9 7.0 8.2

0530 0.0 0.0 0.4 2.4 5.7 6.5

0600 0.0 0.0 0.8 2.5 5.7 6.1

0630 0.0 0.0 1.7 3.8 6.7 7.1

0700 0.0 0.4 1.2 4.1 7.4 8.2

0730 0.0 0.4 1.2 4.1 7.3 8.1

0800 0.0 0.4 0.8 2.9 6.1 7.0

0830 0.0 0.4 0.4 2.0 4.5 5.7

0900 0.0 0.4 0.4 2.0 4.9 6.6

0930 0.0 0.4 0.4 2.0 4.5 5.7

1000 0.0 0.0 0.4 1.2 4.1 4.9

1030 0.0 0.0 0.4 1.2 4.1 4.6

1100 0.0 0.0 0.0 0.8 2.9 3.3

1130 0.0 0.0 0.0 0.8 2.5 2.9

1200 0.0 0.0 0.0 0.8 2.5 2.9

1230 0.0 0.0 0.0 0.8 2.5 3.3

1300 0.0 0.0 0.0 0.8 2.4 3.3

1330 0.0 0.0 0.0 0.8 2.9 3.7

1400 0.0 0.0 0.0 0.4 2.0 4.1

1430 0.0 0.0 0.0 0.4 2.8 3.3

1500 0.0 0.0 0.0 0.4 2.4 2.8

1530 0.0 0.0 0.0 0.4 2.5 3.3

1600 0.0 0.0 0.0 0.8 2.9 3.7

1630 0.0 0.0 0.0 0.4 2.0 4.5

1700 0.0 0.0 0.0 0.4 2.0 4.1

1730 0.0 0.4 0.4 0.8 2.5 4.1

1800 0.0 0.4 0.4 0.4 1.6 3.3

1830 0.0 0.4 0.8 0.8 2.1 2.9

1900 0.0 0.0 0.8 0.8 2.0 2.4

1930 0.0 0.0 0.4 0.4 2.5 3.3

2000 0.0 0.0 0.4 0.8 2.5 3.3

2030 0.0 0.0 0.4 0.4 2.5 3.3

2100 0.0 0.4 0.4 0.4 2.4 3.2

2130 0.0 0.4 0.4 0.4 2.1 2.5

2200 0.0 0.4 0.4 0.4 2.5 2.9

2230 0.0 0.4 0.4 0.8 1.3 2.1

2300 0.0 0.4 0.4 1.3 1.7 1.72330 0.0 0.4 0.8 1.6 2.1 2.1

MEAN 0.0 0.2 0.5 1.5 3.6 4.5





TIME (UTC) Hs*






Table 49. Frequency of the height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times – April (ICAO Model C)

MODEL C

AERODROME: LYBE MONTH: IV



<100 <200 <300 <500 <1 000 <1 500 0000 0.0 0.0 0.0 0.0 0.8 2.1

0030 0.0 0.0 0.0 0.0 1.3 1.7

0100 0.0 0.0 0.0 0.4 1.7 2.1

0130 0.0 0.0 0.4 0.9 1.7 2.2

0200 0.0 0.0 0.9 1.3 3.4 3.8

0230 0.0 0.4 0.9 2.1 3.4 4.3

0300 0.0 0.4 0.8 2.5 2.9 4.6

0330 0.0 0.0 0.9 1.7 2.6 3.4

0400 0.0 0.9 1.7 2.6 3.4 4.3

0430 0.0 0.4 1.7 2.5 4.2 5.1

0500 0.0 0.4 1.3 2.1 3.4 4.3

0530 0.0 0.4 1.3 2.5 4.6 5.4

0600 0.0 0.4 1.3 3.0 5.6 6.0

0630 0.0 0.0 0.4 1.7 5.1 5.5

0700 0.0 0.0 0.4 1.3 5.1 5.5

0730 0.0 0.0 0.0 0.4 4.2 5.5

0800 0.0 0.0 0.0 0.4 3.8 5.1

0830 0.0 0.0 0.0 0.4 2.5 4.2

0900 0.0 0.0 0.0 0.4 2.2 3.5

0930 0.0 0.0 0.0 0.0 1.7 3.0

1000 0.0 0.0 0.0 0.0 0.8 2.5

1030 0.0 0.0 0.0 0.0 0.8 2.1

1100 0.0 0.0 0.0 0.0 1.3 2.1

1130 0.0 0.0 0.0 0.0 1.3 2.5

1200 0.0 0.0 0.0 0.0 1.7 3.0

1230 0.0 0.0 0.0 0.0 1.3 2.6

1300 0.0 0.0 0.0 0.0 0.9 1.7

1330 0.0 0.0 0.0 0.0 1.3 2.1

1400 0.0 0.0 0.0 0.0 0.4 1.3

1430 0.0 0.0 0.0 0.0 1.3 1.7

1500 0.0 0.0 0.0 0.0 0.9 1.7

1530 0.0 0.0 0.0 0.4 1.3 1.7

1600 0.0 0.0 0.0 0.4 0.8 2.1

1630 0.0 0.0 0.0 0.0 0.8 2.1

1700 0.0 0.0 0.0 0.8 0.8 2.1

1730 0.0 0.0 0.0 0.8 1.3 2.5

1800 0.0 0.0 0.0 0.8 1.7 2.1

1830 0.0 0.0 0.0 0.8 0.8 1.7

1900 0.0 0.0 0.0 0.8 0.8 1.7

1930 0.0 0.0 0.0 0.8 1.3 2.1

2000 0.0 0.0 0.0 0.8 1.3 1.7

2030 0.0 0.0 0.0 0.0 0.9 1.3

2100 0.0 0.0 0.0 0.0 0.9 1.3

2130 0.0 0.0 0.0 0.0 0.8 0.8

2200 0.0 0.0 0.0 0.0 0.9 0.9

2230 0.0 0.0 0.0 0.0 0.8 1.3

2300 0.0 0.0 0.0 0.0 1.3 2.12330 0.0 0.0 0.0 0.0 1.3 2.1

MEAN 0.0 0.1 0.2 0.7 1.9 2.8





TIME (UTC) Hs*






Table 50. Frequency of the height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times – May (ICAO Model C)

MODEL C

AERODROME: LYBE MONTH: V



<100 <200 <300 <500 <1 000 <1 500 0000 0.0 0.0 0.0 0.4 1.6 1.6

0030 0.0 0.0 0.0 0.4 0.8 1.2

0100 0.0 0.0 0.0 0.4 0.8 0.8

0130 0.0 0.0 0.4 0.8 1.6 1.6

0200 0.0 0.0 0.4 0.8 2.4 2.8

0230 0.0 0.0 0.4 0.8 2.4 2.4

0300 0.0 0.0 0.0 1.2 2.4 3.7

0330 0.0 0.0 0.0 0.8 2.0 3.3

0400 0.0 0.0 0.8 1.2 3.3 3.3

0430 0.0 0.0 0.4 1.2 3.6 4.5

0500 0.0 0.0 0.4 2.0 4.5 4.9

0530 0.0 0.0 0.8 2.4 4.9 5.7

0600 0.0 0.0 0.0 1.2 4.9 6.1

0630 0.0 0.0 0.0 1.2 4.1 5.7

0700 0.0 0.0 0.0 0.8 3.3 4.9

0730 0.0 0.0 0.0 0.4 2.8 4.1

0800 0.0 0.0 0.0 0.4 2.0 3.3

0830 0.0 0.0 0.0 0.4 1.2 3.3

0900 0.0 0.0 0.0 0.8 1.2 1.2

0930 0.0 0.0 0.0 0.0 0.4 1.2

1000 0.0 0.0 0.0 0.0 0.8 1.2

1030 0.0 0.0 0.0 0.0 0.8 1.2

1100 0.0 0.0 0.0 0.0 0.4 0.4

1130 0.0 0.0 0.0 0.0 0.4 0.8

1200 0.0 0.0 0.0 0.0 0.4 0.8

1230 0.0 0.0 0.0 0.0 0.4 0.8

1300 0.0 0.0 0.0 0.0 0.4 0.8

1330 0.0 0.0 0.0 0.0 0.4 0.8

1400 0.0 0.0 0.0 0.0 0.4 1.2

1430 0.0 0.0 0.0 0.4 0.4 1.2

1500 0.0 0.0 0.0 0.0 0.4 0.4

1530 0.0 0.0 0.0 0.0 0.0 0.0

1600 0.0 0.0 0.0 0.0 0.0 0.0

1630 0.0 0.0 0.0 0.0 0.0 0.4

1700 0.0 0.0 0.0 0.0 0.4 0.4

1730 0.0 0.0 0.0 0.0 0.4 0.4

1800 0.0 0.0 0.0 0.0 0.4 0.4

1830 0.0 0.0 0.0 0.0 0.4 0.4

1900 0.0 0.0 0.0 0.0 0.0 0.4

1930 0.0 0.0 0.0 0.0 0.4 1.2

2000 0.0 0.0 0.0 0.0 0.8 1.2

2030 0.0 0.0 0.0 0.0 0.8 1.2

2100 0.0 0.0 0.0 0.0 0.4 0.8

2130 0.0 0.0 0.0 0.0 1.2 1.6

2200 0.0 0.0 0.0 0.0 0.8 1.2

2230 0.0 0.0 0.0 0.0 1.2 2.1

2300 0.0 0.0 0.0 0.0 1.2 2.02330 0.0 0.0 0.0 0.0 1.6 2.4

MEAN 0.0 0.0 0.1 0.4 1.4 1.9





TIME (UTC) Hs*






Table 51. Frequency of the height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times – June (ICAO Model C)

MODEL C

AERODROME: LYBE MONTH: VI



<100 <200 <300 <500 <1 000 <1 500 0000 0.0 0.0 0.0 0.0 0.0 0.9

0030 0.0 0.0 0.0 0.0 0.0 0.8

0100 0.0 0.0 0.0 0.4 1.3 1.7

0130 0.0 0.0 0.0 0.0 0.8 1.3

0200 0.0 0.0 0.0 1.3 2.1 2.1

0230 0.0 0.0 0.4 1.3 2.1 2.1

0300 0.0 0.0 0.8 1.7 2.5 2.9

0330 0.0 0.0 0.4 2.1 3.3 3.8

0400 0.0 0.0 0.0 2.9 5.4 5.8

0430 0.0 0.0 0.0 2.1 4.2 4.6

0500 0.0 0.0 0.0 1.7 4.6 5.5

0530 0.0 0.0 0.8 2.5 7.9 9.6

0600 0.0 0.0 0.0 1.3 6.3 8.9

0630 0.0 0.0 0.0 0.8 6.3 7.5

0700 0.0 0.0 0.0 1.3 5.4 7.1

0730 0.0 0.0 0.0 1.3 5.0 6.3

0800 0.0 0.0 0.0 0.8 3.3 4.6

0830 0.0 0.0 0.0 0.4 2.5 4.2

0900 0.0 0.0 0.0 0.4 2.1 3.8

0930 0.0 0.0 0.0 0.4 1.7 3.3

1000 0.0 0.0 0.0 0.4 1.3 2.5

1030 0.0 0.0 0.0 0.0 1.3 2.1

1100 0.0 0.0 0.0 0.0 1.7 2.5

1130 0.0 0.0 0.0 0.0 1.3 2.1

1200 0.0 0.0 0.0 0.0 0.8 2.5

1230 0.0 0.0 0.0 0.0 0.4 2.1

1300 0.0 0.0 0.0 0.0 0.0 1.3

1330 0.0 0.0 0.0 0.0 0.0 1.3

1400 0.0 0.0 0.0 0.0 0.4 1.3

1430 0.0 0.0 0.0 0.0 0.4 1.3

1500 0.0 0.0 0.0 0.0 0.4 1.7

1530 0.0 0.0 0.0 0.0 0.8 2.1

1600 0.0 0.0 0.0 0.0 0.4 1.7

1630 0.0 0.0 0.0 0.0 0.8 2.1

1700 0.0 0.0 0.0 0.0 0.8 2.1

1730 0.0 0.0 0.0 0.0 0.8 1.7

1800 0.0 0.0 0.0 0.0 0.8 1.7

1830 0.0 0.0 0.0 0.0 1.3 2.1

1900 0.0 0.0 0.0 0.0 0.8 1.7

1930 0.0 0.0 0.0 0.0 1.3 1.3

2000 0.0 0.0 0.0 0.0 1.3 1.3

2030 0.0 0.0 0.0 0.0 0.8 0.8

2100 0.0 0.0 0.0 0.0 0.8 0.8

2130 0.0 0.0 0.0 0.0 0.4 0.4

2200 0.0 0.0 0.0 0.0 0.4 0.4

2230 0.0 0.0 0.0 0.0 0.4 0.8

2300 0.0 0.0 0.0 0.0 0.0 0.82330 0.0 0.0 0.0 0.0 0.0 1.3

MEAN 0.0 0.0 0.1 0.5 1.8 2.7





TIME (UTC) Hs*






Table 52. Frequency of the height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times – July (ICAO Model C)

MODEL C

AERODROME: LYBE MONTH: VII



<100 <200 <300 <500 <1 000 <1 500 0000 0.0 0.0 0.4 0.8 1.6 1.6

0030 0.0 0.0 0.4 0.8 1.6 1.6

0100 0.0 0.0 0.4 0.4 2.4 2.4

0130 0.0 0.0 0.4 0.4 2.8 3.2

0200 0.0 0.0 0.0 0.4 2.4 3.2

0230 0.0 0.0 0.0 0.4 2.8 3.7

0300 0.0 0.0 0.4 0.4 2.0 2.4

0330 0.0 0.0 0.0 1.2 2.8 2.8

0400 0.0 0.0 0.8 1.6 2.8 4.4

0430 0.0 0.0 0.0 0.8 1.6 3.2

0500 0.0 0.0 0.0 0.8 1.6 2.4

0530 0.0 0.0 0.4 1.6 2.4 3.2

0600 0.0 0.0 0.0 1.2 2.8 3.2

0630 0.0 0.0 0.0 0.4 1.6 2.4

0700 0.0 0.0 0.0 0.4 1.2 2.0

0730 0.0 0.0 0.0 0.0 1.2 2.4

0800 0.0 0.0 0.0 0.0 1.2 2.4

0830 0.0 0.0 0.0 0.0 1.2 2.0

0900 0.0 0.0 0.0 0.0 0.8 1.6

0930 0.0 0.0 0.0 0.0 0.4 0.8

1000 0.0 0.0 0.0 0.0 0.0 0.0

1030 0.0 0.0 0.0 0.0 1.2 1.2

1100 0.0 0.0 0.0 0.0 0.8 0.8

1130 0.0 0.0 0.0 0.0 0.8 0.8

1200 0.0 0.0 0.0 0.0 0.8 0.8

1230 0.0 0.0 0.0 0.0 0.4 0.4

1300 0.0 0.0 0.0 0.0 0.4 0.4

1330 0.0 0.0 0.0 0.0 0.4 0.8

1400 0.0 0.0 0.0 0.0 0.0 0.0

1430 0.0 0.0 0.0 0.0 0.0 0.0

1500 0.0 0.0 0.0 0.0 0.0 0.0

1530 0.0 0.0 0.0 0.0 0.0 0.0

1600 0.0 0.0 0.0 0.0 0.0 0.0

1630 0.0 0.0 0.0 0.0 0.0 0.0

1700 0.0 0.0 0.0 0.0 0.0 0.0

1730 0.0 0.0 0.0 0.0 0.4 0.8

1800 0.0 0.0 0.0 0.0 0.4 0.4

1830 0.0 0.0 0.0 0.0 0.0 0.0

1900 0.0 0.0 0.0 0.0 0.0 0.0

1930 0.0 0.0 0.0 0.0 0.0 0.0

2000 0.0 0.0 0.0 0.0 0.4 0.4

2030 0.0 0.0 0.0 0.0 0.4 0.4

2100 0.0 0.0 0.0 0.0 0.8 0.8

2130 0.0 0.0 0.0 0.0 0.8 0.8

2200 0.0 0.0 0.0 0.0 1.2 1.2

2230 0.0 0.0 0.0 0.0 0.8 0.8

2300 0.0 0.0 0.0 0.0 0.4 0.42330 0.0 0.0 0.0 0.8 1.6 1.6

MEAN 0.0 0.0 0.1 0.3 1.0 1.3





TIME (UTC) Hs*






Table 53. Frequency of the height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times – August (ICAO Model C)

MODEL C

AERODROME: LYBE MONTH: VIII



<100 <200 <300 <500 <1 000 <1 500 0000 0.0 0.0 0.0 0.8 0.8 0.8

0030 0.0 0.0 0.0 0.8 1.2 1.6

0100 0.0 0.0 0.8 2.0 2.4 2.8

0130 0.0 0.0 0.8 2.0 2.8 3.3

0200 0.0 0.0 0.4 1.2 1.6 1.6

0230 0.0 0.4 0.8 1.6 2.8 2.8

0300 0.0 0.0 0.4 1.2 2.0 2.0

0330 0.0 0.0 0.4 1.2 2.0 2.4

0400 0.0 0.0 0.4 1.2 1.6 2.0

0430 0.0 1.2 1.2 1.6 2.0 2.4

0500 0.0 0.8 1.2 1.6 2.4 2.8

0530 0.0 0.4 2.0 3.6 4.9 4.9

0600 0.0 0.4 2.1 3.8 5.4 5.4

0630 0.0 0.4 1.6 3.2 4.9 4.9

0700 0.0 0.0 0.8 2.4 4.1 4.1

0730 0.0 0.0 0.0 1.2 4.0 4.8

0800 0.0 0.0 0.0 0.8 2.0 2.0

0830 0.0 0.0 0.0 0.4 2.0 2.8

0900 0.0 0.0 0.0 0.4 1.2 2.1

0930 0.0 0.0 0.0 0.4 1.2 1.2

1000 0.0 0.0 0.0 0.4 0.8 1.6

1030 0.0 0.0 0.0 0.0 0.8 1.6

1100 0.0 0.0 0.0 0.0 0.4 0.8

1130 0.0 0.0 0.0 0.0 0.4 0.8

1200 0.0 0.0 0.0 0.0 0.4 1.2

1230 0.0 0.0 0.0 0.0 0.8 0.8

1300 0.0 0.0 0.0 0.0 0.4 0.8

1330 0.0 0.0 0.0 0.0 0.4 0.4

1400 0.0 0.0 0.0 0.0 0.4 0.4

1430 0.0 0.0 0.0 0.0 0.4 0.4

1500 0.0 0.0 0.0 0.0 0.4 0.4

1530 0.0 0.0 0.0 0.0 0.4 0.4

1600 0.0 0.0 0.0 0.0 0.0 0.4

1630 0.0 0.0 0.0 0.0 0.0 0.0

1700 0.0 0.0 0.0 0.0 0.0 0.0

1730 0.0 0.0 0.0 0.0 0.4 0.4

1800 0.0 0.0 0.0 0.0 0.4 0.4

1830 0.0 0.0 0.0 0.0 0.8 0.8

1900 0.0 0.0 0.0 0.0 0.8 0.8

1930 0.0 0.0 0.0 0.4 0.8 0.8

2000 0.0 0.0 0.0 0.8 1.2 1.2

2030 0.0 0.0 0.0 0.8 1.2 1.2

2100 0.0 0.0 0.0 0.4 0.8 0.8

2130 0.0 0.0 0.0 0.4 0.8 1.2

2200 0.0 0.0 0.0 0.8 1.2 1.2

2230 0.0 0.0 0.0 0.4 1.2 1.2

2300 0.0 0.0 0.0 0.4 1.2 1.62330 0.0 0.0 0.0 0.4 1.2 1.2

MEAN 0.0 0.1 0.3 0.8 1.5 1.7





TIME (UTC) Hs*






Table 54. Frequency of the height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times – September (ICAO Model C)

MODEL C

AERODROME: LYBE MONTH: IX



<100 <200 <300 <500 <1 000 <1 500 0000 0.0 0.0 0.0 0.0 1.3 2.1

0030 0.0 0.0 0.0 0.0 1.3 2.1

0100 0.0 0.0 0.4 1.7 2.5 2.9

0130 0.0 0.0 0.8 2.9 4.2 4.2

0200 0.0 0.4 0.8 3.8 4.6 4.6

0230 0.0 0.0 0.8 3.3 4.2 4.2

0300 0.0 0.0 0.4 2.5 2.9 2.9

0330 0.0 0.0 0.8 2.5 3.4 3.4

0400 0.0 0.0 0.9 2.6 3.4 4.3

0430 0.0 0.0 0.8 2.5 4.2 5.5

0500 0.0 0.4 1.3 2.9 5.5 5.9

0530 0.0 0.0 0.4 3.0 5.9 6.3

0600 0.0 0.4 0.8 3.4 6.3 7.1

0630 0.0 0.4 1.3 2.9 6.3 6.7

0700 0.0 0.0 1.3 2.5 5.0 5.5

0730 0.0 0.0 0.8 2.1 5.9 6.3

0800 0.0 0.0 0.4 2.1 5.1 6.4

0830 0.0 0.0 0.0 1.3 4.2 5.5

0900 0.0 0.0 0.0 0.8 2.5 4.7

0930 0.0 0.0 0.0 0.9 3.4 5.1

1000 0.0 0.0 0.0 0.4 3.0 4.2

1030 0.0 0.0 0.0 0.0 2.5 3.8

1100 0.0 0.0 0.0 0.0 2.6 3.0

1130 0.0 0.0 0.0 0.0 1.7 2.1

1200 0.0 0.0 0.0 0.0 1.7 2.1

1230 0.0 0.0 0.0 0.0 0.9 1.3

1300 0.0 0.0 0.0 0.0 0.4 0.8

1330 0.0 0.0 0.0 0.0 0.9 1.7

1400 0.0 0.0 0.0 0.0 0.4 0.8

1430 0.0 0.0 0.0 0.0 0.4 1.3

1500 0.0 0.0 0.0 0.0 0.8 1.7

1530 0.0 0.0 0.0 0.0 0.4 0.8

1600 0.0 0.0 0.0 0.0 0.4 1.3

1630 0.0 0.0 0.0 0.0 0.8 1.3

1700 0.0 0.0 0.0 0.0 1.3 1.3

1730 0.0 0.0 0.0 0.0 1.3 1.7

1800 0.0 0.0 0.0 0.0 1.3 1.3

1830 0.0 0.0 0.0 0.0 0.8 2.1

1900 0.0 0.0 0.0 0.0 0.4 1.7

1930 0.0 0.0 0.0 0.0 0.4 0.8

2000 0.0 0.0 0.0 0.0 1.3 1.7

2030 0.0 0.0 0.0 0.0 1.7 1.7

2100 0.0 0.0 0.0 0.0 0.8 1.3

2130 0.0 0.0 0.0 0.0 1.3 1.3

2200 0.0 0.0 0.0 0.0 1.3 1.7

2230 0.0 0.0 0.0 0.0 0.8 1.7

2300 0.0 0.0 0.0 0.0 1.3 2.52330 0.0 0.0 0.0 0.0 1.3 2.5

MEAN 0.0 0.0 0.3 0.9 2.4 3.0





TIME (UTC) Hs*






Table 55. Frequency of the height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times – October (ICAO Model C)

MODEL C

AERODROME: LYBE MONTH: X



<100 <200 <300 <500 <1 000 <1 500 0000 0.0 1.6 2.0 2.4 3.3 4.5

0030 0.0 1.2 2.4 3.6 4.9 5.7

0100 0.0 0.8 2.0 3.2 4.5 4.9

0130 0.0 1.2 3.3 4.1 5.3 5.7

0200 0.0 1.2 3.3 4.1 5.3 5.7

0230 0.0 1.2 2.8 4.0 6.1 6.5

0300 0.0 1.2 2.8 4.1 5.7 6.9

0330 0.0 1.6 3.3 4.5 6.5 7.3

0400 0.0 1.6 3.2 5.3 6.9 8.5

0430 0.0 1.6 3.7 6.1 8.6 9.0

0500 0.0 1.2 3.6 6.1 8.5 8.5

0530 0.0 1.6 3.7 6.5 9.4 9.4

0600 0.0 1.2 5.3 8.1 10.9 11.3

0630 0.0 1.2 6.1 8.9 11.7 12.1

0700 0.0 0.4 4.1 9.4 12.2 13.9

0730 0.0 0.4 2.0 6.9 10.2 11.8

0800 0.0 0.4 2.9 6.1 10.2 11.0

0830 0.0 0.4 1.2 4.9 9.7 10.5

0900 0.0 0.0 1.6 4.8 9.7 10.5

0930 0.0 0.0 1.2 5.3 9.0 11.8

1000 0.0 0.0 1.2 3.7 7.3 10.2

1030 0.0 0.0 0.0 2.9 5.8 8.6

1100 0.0 0.0 0.0 2.4 5.3 7.8

1130 0.0 0.0 0.0 1.6 5.2 6.9

1200 0.0 0.0 0.0 0.8 6.0 8.1

1230 0.0 0.0 0.0 0.8 6.1 7.8

1300 0.0 0.0 0.0 0.8 5.7 7.3

1330 0.0 0.0 0.4 1.6 6.5 8.6

1400 0.0 0.0 0.4 1.6 4.9 7.3

1430 0.0 0.0 0.4 1.6 4.5 7.3

1500 0.0 0.0 0.4 1.6 3.2 5.6

1530 0.0 0.0 0.0 2.4 4.1 5.3

1600 0.0 0.0 0.0 1.6 2.8 4.9

1630 0.0 0.0 0.8 1.6 2.4 3.7

1700 0.0 0.0 0.8 1.6 2.4 3.7

1730 0.0 0.0 0.8 2.0 3.7 4.5

1800 0.0 0.4 0.8 2.5 4.9 5.7

1830 0.0 0.4 0.8 2.0 3.3 4.1

1900 0.0 0.4 0.8 1.6 3.3 4.5

1930 0.0 0.4 0.4 1.6 2.4 4.1

2000 0.0 0.4 0.4 1.2 2.0 3.3

2030 0.0 0.0 0.8 1.2 2.4 3.7

2100 0.0 0.0 0.8 1.2 2.4 3.6

2130 0.0 0.4 1.6 1.6 2.8 2.8

2200 0.0 0.4 1.6 2.4 2.8 3.3

2230 0.0 0.8 1.6 2.4 2.8 3.3

2300 0.0 1.2 2.1 2.5 3.3 3.32330 0.0 1.2 2.0 2.9 3.7 4.1

MEAN 0.0 0.6 1.7 3.3 5.6 6.8





TIME (UTC) Hs*






Table 56. Frequency of the height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times – November (ICAO Model C)

MODEL C

AERODROME: LYBE MONTH: XI



<100 <200 <300 <500 <1 000 <1 500 0000 0.0 3.3 6.3 8.8 10.9 12.6

0030 0.0 3.8 6.8 8.9 11.8 13.1

0100 0.0 3.8 6.7 8.4 11.3 13.4

0130 0.0 3.8 8.0 9.2 11.8 13.4

0200 0.0 4.2 8.8 9.7 12.2 13.9

0230 0.0 4.6 9.7 10.9 13.4 15.5

0300 0.0 5.0 10.5 10.9 14.7 15.5

0330 0.0 5.9 10.5 12.1 15.5 16.3

0400 0.0 5.9 11.4 13.5 16.5 16.9

0430 0.0 5.0 10.4 12.5 15.8 16.3

0500 0.0 4.6 9.6 11.7 15.0 15.4

0530 0.0 5.5 10.9 13.0 16.0 16.8

0600 0.0 5.0 9.2 12.1 14.2 15.1

0630 0.0 7.1 11.7 14.6 16.7 17.6

0700 0.0 7.6 11.4 13.1 15.3 15.7

0730 0.0 5.0 9.6 11.7 14.6 15.0

0800 0.0 3.8 7.1 10.1 13.0 13.9

0830 0.0 3.3 7.1 9.2 12.6 13.8

0900 0.0 2.5 6.7 8.0 12.2 13.4

0930 0.0 1.7 5.0 7.9 12.5 13.8

1000 0.0 1.7 4.6 8.0 12.6 14.7

1030 0.0 1.7 4.2 5.9 8.8 10.9

1100 0.0 1.7 4.2 5.9 9.2 11.3

1130 0.0 0.4 4.2 5.1 8.0 11.0

1200 0.0 0.0 3.0 5.1 7.6 10.5

1230 0.0 0.4 2.9 5.0 8.4 10.0

1300 0.0 0.4 3.4 5.1 7.6 8.9

1330 0.0 0.8 3.4 4.2 7.6 8.8

1400 0.0 0.4 3.8 4.2 8.0 9.7

1430 0.0 1.3 3.8 4.7 7.6 9.3

1500 0.0 0.8 3.8 5.4 7.9 9.6

1530 0.0 2.5 4.2 5.1 8.0 9.7

1600 0.0 1.7 3.4 5.1 6.8 8.5

1630 0.0 2.1 4.7 5.9 8.1 10.2

1700 0.0 1.7 4.7 5.5 8.1 9.3

1730 0.0 1.7 5.1 6.3 10.1 12.2

1800 0.0 2.1 5.0 6.3 9.6 11.7

1830 0.0 2.9 5.0 7.6 10.1 12.2

1900 0.0 4.2 5.9 7.6 11.0 12.7

1930 0.0 4.2 5.9 7.1 10.9 11.8

2000 0.0 3.4 6.3 7.6 10.1 11.3

2030 0.0 3.3 5.4 6.7 9.6 11.3

2100 0.0 3.8 5.4 7.1 9.2 10.9

2130 0.0 4.2 5.9 8.0 9.7 11.8

2200 0.0 4.2 6.3 7.9 9.2 10.9

2230 0.0 4.6 7.1 8.4 10.9 12.1

2300 0.0 5.1 7.2 8.5 11.1 14.02330 0.0 4.6 7.1 8.4 10.9 13.8

MEAN 0.0 3.3 6.5 8.2 11.1 12.6





TIME (UTC) Hs*






Table 57. Frequencies of the height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times – December (ICAO Model C)

MODEL C

AERODROME: LYBE MONTH: XII



<100 <200 <300 <500 <1 000 <1 500 0000 0.0 3.3 7.0 12.4 19.4 23.1

0030 0.0 2.9 7.8 13.2 19.8 23.9

0100 0.0 3.7 8.7 14.1 19.9 22.8

0130 0.0 3.7 7.1 14.1 19.5 22.8

0200 0.0 3.7 6.6 13.5 19.7 21.7

0230 0.0 4.1 7.8 14.8 21.7 24.6

0300 0.0 4.5 7.8 14.3 22.5 23.8

0330 0.0 3.2 8.9 15.3 23.4 25.0

0400 0.0 3.2 8.1 17.0 23.5 25.5

0430 0.0 2.4 8.5 16.9 24.6 27.0

0500 0.0 2.8 8.9 17.3 25.0 27.8

0530 0.0 3.2 8.1 16.6 23.9 25.5

0600 0.0 3.7 9.3 16.7 24.0 26.4

0630 0.0 4.9 9.7 19.4 25.9 28.3

0700 0.0 4.5 8.9 15.4 22.8 24.8

0730 0.0 4.8 8.5 15.3 23.4 25.8

0800 0.0 5.3 9.3 16.2 21.9 24.7

0830 0.0 3.3 8.9 15.0 21.5 24.4

0900 0.0 2.0 7.7 13.4 19.9 22.0

0930 0.0 2.8 7.7 12.9 22.2 23.8

1000 0.0 1.6 5.7 12.2 20.8 22.9

1030 0.0 2.0 5.3 11.8 20.3 23.2

1100 0.0 2.4 5.3 11.4 20.7 24.0

1130 0.0 2.8 4.9 9.3 18.2 20.2

1200 0.0 2.4 4.1 8.9 15.9 19.5

1230 0.0 1.6 3.7 8.6 15.1 18.8

1300 0.0 1.2 3.2 8.1 15.8 20.2

1330 0.0 1.2 4.1 7.0 14.8 19.7

1400 0.0 2.0 3.7 6.9 15.0 19.5

1430 0.0 2.4 4.1 8.6 14.7 20.0

1500 0.0 2.0 4.0 7.7 15.0 21.9

1530 0.0 2.4 4.1 8.5 14.6 20.7

1600 0.0 1.6 4.1 8.9 16.3 19.9

1630 0.0 2.0 5.3 9.0 16.3 20.0

1700 0.0 2.0 4.9 7.8 13.9 17.6

1730 0.0 2.1 5.8 7.4 12.8 18.6

1800 0.0 2.0 7.0 9.4 14.3 20.5

1830 0.0 2.0 6.9 10.1 15.0 21.5

1900 0.0 2.5 6.6 10.2 14.8 19.7

1930 0.0 3.3 6.5 9.3 14.2 19.5

2000 0.0 3.7 7.0 9.8 14.3 18.4

2030 0.0 4.9 6.6 10.3 15.6 20.2

2100 0.0 4.9 7.3 10.6 14.6 17.9

2130 0.0 3.7 8.2 11.5 16.0 19.3

2200 0.0 3.7 8.2 12.7 19.6 22.9

2230 0.0 4.1 9.3 13.0 19.1 22.0

2300 0.0 3.3 8.6 12.3 18.9 23.02330 0.0 3.3 7.3 11.4 18.3 21.5

MEAN 0.0 3.0 6.8 12.0 18.7 22.2





TIME (UTC) Hs*






Table 58. Frequencies of the height of the base of the lowest cloud layer of BKN or OVC < 100 ft (based on ICAO Model C)

MONTH/


1300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1430 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1500 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1530 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1700 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

2000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

2030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

2100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

2130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

2200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

2230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

2300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

2330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.0 0.0 0.0

0030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0430 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0500 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0530 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0700 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

0930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

1300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

MEAN 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0






MONTH/


1300 0.0 0.0 0.0 0.0 0.0 0.4 1.2 0.0 0.0 0.0 0.0 0.0 0.0

1330 0.0 0.0 0.0 0.0 0.0 0.8 1.2 0.4 0.0 0.0 0.0 0.0 0.0

1400 0.0 0.0 0.0 0.0 0.0 0.4 2.0 0.4 0.0 0.0 0.0 0.0 0.0

1430 0.0 0.0 0.0 0.0 0.0 1.3 2.4 0.8 0.0 0.0 0.0 0.0 0.0

1500 0.0 0.0 0.0 0.0 0.0 0.8 2.0 0.8 0.0 0.0 0.0 0.0 0.0

1530 0.0 0.0 0.0 0.0 0.0 2.5 2.4 1.7 0.0 0.0 0.0 0.0 0.0

1600 0.0 0.0 0.0 0.0 0.0 1.7 1.6 1.6 0.0 0.0 0.0 0.0 0.0

1630 0.0 0.0 0.0 0.0 0.0 2.1 2.0 1.7 0.0 0.0 0.0 0.0 0.0

1700 0.0 0.0 0.0 0.0 0.0 1.7 2.0 1.2 0.4 0.0 0.0 0.0 0.0

1730 0.0 0.0 0.0 0.0 0.0 1.7 2.1 1.6 0.5 0.4 0.0 0.0 0.0

1800 0.0 0.0 0.0 0.0 0.4 2.1 2.0 2.1 0.5 0.4 0.0 0.0 0.0

1830 0.0 0.0 0.0 0.0 0.4 2.9 2.0 2.5 0.9 0.4 0.0 0.0 0.0

1900 0.0 0.0 0.0 0.0 0.4 4.2 2.5 2.4 0.4 0.0 0.0 0.0 0.0

1930 0.0 0.0 0.0 0.0 0.4 4.2 3.3 3.2 0.5 0.0 0.0 0.0 0.0

2000 0.0 0.0 0.0 0.0 0.4 3.4 3.7 3.7 0.5 0.0 0.0 0.0 0.0

2030 0.0 0.0 0.0 0.0 0.0 3.3 4.9 3.3 0.5 0.0 0.0 0.0 0.0

2100 0.0 0.0 0.0 0.0 0.0 3.8 4.9 2.9 0.5 0.4 0.0 0.0 0.0

2130 0.0 0.0 0.0 0.0 0.4 4.2 3.7 2.1 0.5 0.4 0.0 0.0 0.0

2200 0.0 0.0 0.0 0.0 0.4 4.2 3.7 3.2 0.5 0.4 0.0 0.0 0.0

2230 0.0 0.0 0.0 0.0 0.8 4.6 4.1 4.1 0.9 0.4 0.0 0.0 0.0

2300 0.0 0.0 0.0 0.0 1.2 5.1 3.3 4.5 0.5 0.4 0.0 0.0 0.0

2330 0.0 0.0 0.0 0.0 1.2 4.6 3.3 4.0 0.9 0.4 0.0 0.0 0.0

0000 0.0 0.0 0.0 0.0 1.6 3.3 3.3 3.7 0.9 0.8 0.0 0.0 0.0

0030 0.0 0.0 0.0 0.0 1.2 3.8 2.9 3.7 0.9 0.4 0.0 0.0 0.0

0100 0.0 0.0 0.0 0.0 0.8 3.8 3.7 2.8 0.4 0.0 0.0 0.0 0.0

0130 0.0 0.0 0.0 0.0 1.2 3.8 3.7 3.3 0.4 0.0 0.0 0.0 0.0

0200 0.0 0.0 0.0 0.4 1.2 4.2 3.7 4.5 1.3 0.0 0.0 0.0 0.0

0230 0.0 0.0 0.4 0.0 1.2 4.6 4.1 5.3 0.9 0.0 0.4 0.0 0.0

0300 0.0 0.0 0.0 0.0 1.2 5.0 4.5 4.0 1.3 0.0 0.4 0.0 0.0

0330 0.0 0.0 0.0 0.0 1.6 5.9 3.2 3.3 1.4 0.0 0.0 0.0 0.0

0400 0.0 0.0 0.0 0.0 1.6 5.9 3.2 3.3 1.3 0.0 0.9 0.0 0.0

0430 0.0 0.0 1.2 0.0 1.6 5.0 2.4 3.7 1.3 0.0 0.4 0.0 0.0

0500 0.0 0.0 0.8 0.4 1.2 4.6 2.8 4.0 1.3 0.0 0.4 0.0 0.0

0530 0.0 0.0 0.4 0.0 1.6 5.5 3.2 3.7 1.8 0.0 0.4 0.0 0.0

0600 0.0 0.0 0.4 0.4 1.2 5.0 3.7 3.7 1.9 0.0 0.4 0.0 0.0

0630 0.0 0.0 0.4 0.4 1.2 7.1 4.9 4.2 1.4 0.0 0.0 0.0 0.0

0700 0.0 0.0 0.0 0.0 0.4 7.6 4.5 4.0 1.4 0.4 0.0 0.0 0.0

0730 0.0 0.0 0.0 0.0 0.4 5.0 4.8 2.9 1.4 0.4 0.0 0.0 0.0

0800 0.0 0.0 0.0 0.0 0.4 3.8 5.3 3.6 0.9 0.4 0.0 0.0 0.0

0830 0.0 0.0 0.0 0.0 0.4 3.3 3.3 3.3 1.8 0.4 0.0 0.0 0.0

0900 0.0 0.0 0.0 0.0 0.0 2.5 2.0 1.6 0.9 0.4 0.0 0.0 0.0

0930 0.0 0.0 0.0 0.0 0.0 1.7 2.8 1.2 0.9 0.4 0.0 0.0 0.0

1000 0.0 0.0 0.0 0.0 0.0 1.7 1.6 1.2 0.0 0.0 0.0 0.0 0.0

1030 0.0 0.0 0.0 0.0 0.0 1.7 2.0 0.8 0.0 0.0 0.0 0.0 0.0

1100 0.0 0.0 0.0 0.0 0.0 1.7 2.4 0.8 0.0 0.0 0.0 0.0 0.0

1130 0.0 0.0 0.0 0.0 0.0 0.4 2.8 0.8 0.0 0.0 0.0 0.0 0.0

1200 0.0 0.0 0.0 0.0 0.0 0.0 2.4 1.2 0.0 0.0 0.0 0.0 0.0

1230 0.0 0.0 0.0 0.0 0.0 0.4 1.6 0.0 0.0 0.0 0.0 0.0 0.0

1300 0.0 0.0 0.0 0.0 0.0 0.4 1.2 0.0 0.0 0.0 0.0 0.0 0.0

MEAN 0.0 0.0 0.1 0.0 0.5 3.2 3.0 2.5 0.6 0.2 0.1 0.0 0.0






MONTH/


1300 0.0 0.0 0.0 0.0 0.0 3.4 3.2 1.6 0.0 0.0 0.0 0.0 0.0

1330 0.0 0.0 0.0 0.0 0.4 3.4 4.1 2.0 0.0 0.0 0.0 0.0 0.0

1400 0.0 0.0 0.0 0.0 0.4 3.8 3.7 2.0 0.0 0.0 0.0 0.0 0.0

1430 0.0 0.0 0.0 0.0 0.4 3.8 4.1 2.5 0.0 0.0 0.0 0.0 0.0

1500 0.0 0.0 0.0 0.0 0.4 3.8 4.0 2.9 0.0 0.0 0.0 0.0 0.0

1530 0.0 0.0 0.0 0.0 0.0 4.2 4.1 2.9 0.0 0.0 0.0 0.0 0.0

1600 0.0 0.0 0.0 0.0 0.0 3.4 4.1 4.1 0.5 0.0 0.0 0.0 0.0

1630 0.0 0.0 0.0 0.0 0.8 4.7 5.3 3.3 0.9 0.0 0.0 0.0 0.0

1700 0.0 0.0 0.0 0.0 0.8 4.7 4.9 4.1 0.9 0.0 0.0 0.0 0.0

1730 0.0 0.0 0.0 0.0 0.8 5.1 5.8 5.3 0.9 0.4 0.0 0.0 0.0

1800 0.0 0.0 0.0 0.0 0.8 5.0 7.0 5.3 1.0 0.4 0.0 0.0 0.0

1830 0.0 0.0 0.0 0.0 0.8 5.0 6.9 6.3 1.3 0.8 0.0 0.0 0.0

1900 0.0 0.0 0.0 0.0 0.8 5.9 6.6 5.3 1.3 0.8 0.0 0.0 0.0

1930 0.0 0.0 0.0 0.0 0.4 5.9 6.5 6.9 1.4 0.4 0.0 0.0 0.0

2000 0.0 0.0 0.0 0.0 0.4 6.3 7.0 5.3 0.9 0.4 0.0 0.0 0.0

2030 0.0 0.0 0.0 0.0 0.8 5.4 6.6 5.8 2.7 0.4 0.0 0.0 0.0

2100 0.0 0.0 0.0 0.0 0.8 5.4 7.3 5.3 1.8 0.4 0.0 0.0 0.0

2130 0.0 0.0 0.0 0.0 1.6 5.9 8.2 4.5 1.8 0.4 0.0 0.0 0.0

2200 0.0 0.0 0.0 0.0 1.6 6.3 8.2 5.7 1.8 0.4 0.0 0.0 0.0

2230 0.0 0.0 0.0 0.0 1.6 7.1 9.3 7.4 2.7 0.4 0.0 0.0 0.0

2300 0.0 0.0 0.0 0.0 2.1 7.2 8.6 7.7 2.7 0.4 0.0 0.0 0.0

2330 0.0 0.0 0.0 0.0 2.0 7.1 7.3 8.1 2.7 0.8 0.0 0.0 0.0

0000 0.0 0.4 0.0 0.0 2.0 6.3 7.0 9.4 2.3 1.2 0.0 0.0 0.0

0030 0.0 0.4 0.0 0.0 2.4 6.8 7.8 9.5 2.8 0.8 0.0 0.0 0.0

0100 0.0 0.4 0.8 0.4 2.0 6.7 8.7 8.9 2.7 0.4 0.0 0.0 0.0

0130 0.0 0.4 0.8 0.8 3.3 8.0 7.1 8.9 3.6 0.4 0.4 0.4 0.0

0200 0.0 0.0 0.4 0.8 3.3 8.8 6.6 9.4 4.0 0.4 0.9 0.4 0.0

0230 0.4 0.0 0.8 0.8 2.8 9.7 7.8 9.8 3.6 0.8 0.9 0.4 0.4

0300 0.8 0.4 0.4 0.4 2.8 10.5 7.8 8.9 4.0 0.8 0.8 0.0 0.8

0330 0.4 0.0 0.4 0.8 3.3 10.5 8.9 9.3 4.1 0.8 0.9 0.0 0.4

0400 0.0 0.8 0.4 0.9 3.2 11.4 8.1 9.0 3.6 0.8 1.7 0.8 0.0

0430 0.0 0.0 1.2 0.8 3.7 10.4 8.5 8.9 3.1 0.8 1.7 0.4 0.0

0500 0.0 0.0 1.2 1.3 3.6 9.6 8.9 8.9 3.1 0.8 1.3 0.4 0.0

0530 0.8 0.4 2.0 0.4 3.7 10.9 8.1 9.3 3.6 0.4 1.3 0.8 0.8

0600 0.0 0.0 2.1 0.8 5.3 9.2 9.3 9.0 4.7 0.8 1.3 0.0 0.0

0630 0.0 0.0 1.6 1.3 6.1 11.7 9.7 9.2 3.2 1.7 0.4 0.0 0.0

0700 0.0 0.0 0.8 1.3 4.1 11.4 8.9 7.7 4.1 1.2 0.4 0.0 0.0

0730 0.0 0.0 0.0 0.8 2.0 9.6 8.5 6.9 3.6 1.2 0.0 0.0 0.0

0800 0.0 0.0 0.0 0.4 2.9 7.1 9.3 8.5 4.5 0.8 0.0 0.0 0.0

0830 0.0 0.0 0.0 0.0 1.2 7.1 8.9 7.8 2.7 0.4 0.0 0.0 0.0

0900 0.0 0.0 0.0 0.0 1.6 6.7 7.7 5.7 1.8 0.4 0.0 0.0 0.0

0930 0.0 0.0 0.0 0.0 1.2 5.0 7.7 4.9 1.8 0.4 0.0 0.0 0.0

1000 0.0 0.0 0.0 0.0 1.2 4.6 5.7 4.1 0.9 0.4 0.0 0.0 0.0

1030 0.0 0.0 0.0 0.0 0.0 4.2 5.3 3.3 0.5 0.4 0.0 0.0 0.0

1100 0.0 0.0 0.0 0.0 0.0 4.2 5.3 2.9 0.4 0.0 0.0 0.0 0.0

1130 0.0 0.0 0.0 0.0 0.0 4.2 4.9 2.5 0.4 0.0 0.0 0.0 0.0

1200 0.0 0.0 0.0 0.0 0.0 3.0 4.1 2.9 0.0 0.0 0.0 0.0 0.0

1230 0.0 0.0 0.0 0.0 0.0 2.9 3.7 2.1 0.0 0.0 0.0 0.0 0.0

1300 0.0 0.0 0.0 0.0 0.0 3.4 3.2 1.6 0.0 0.0 0.0 0.0 0.0

MEAN 0.1 0.1 0.3 0.2 1.6 6.5 6.7 6.0 1.9 0.5 0.2 0.1 0.1






MONTH/


1300 0.0 0.0 0.0 0.0 0.8 5.1 8.1 4.5 1.4 0.8 0.0 0.0 0.0

1330 0.0 0.0 0.0 0.0 1.6 4.2 7.0 5.3 0.9 0.8 0.0 0.0 0.0

1400 0.0 0.0 0.0 0.0 1.6 4.2 6.9 5.7 0.9 0.4 0.0 0.0 0.0

1430 0.0 0.0 0.0 0.0 1.6 4.7 8.6 5.9 1.4 0.4 0.0 0.4 0.0

1500 0.0 0.0 0.0 0.0 1.6 5.4 7.7 5.8 1.3 0.4 0.0 0.0 0.0

1530 0.0 0.0 0.0 0.0 2.4 5.1 8.5 6.7 1.4 0.4 0.4 0.0 0.0

1600 0.0 0.0 0.0 0.0 1.6 5.1 8.9 7.0 1.8 0.8 0.4 0.0 0.0

1630 0.0 0.0 0.0 0.0 1.6 5.9 9.0 5.4 3.6 0.4 0.0 0.0 0.0

1700 0.0 0.0 0.0 0.0 1.6 5.5 7.8 6.6 3.6 0.4 0.8 0.0 0.0

1730 0.0 0.0 0.0 0.0 2.0 6.3 7.4 8.1 2.7 0.8 0.8 0.0 0.0

1800 0.0 0.0 0.0 0.0 2.5 6.3 9.4 7.8 3.8 0.4 0.8 0.0 0.0

1830 0.0 0.0 0.0 0.0 2.0 7.6 10.1 9.2 3.1 0.8 0.8 0.0 0.0

1900 0.0 0.0 0.0 0.0 1.6 7.6 10.2 8.1 3.1 0.8 0.8 0.0 0.0

1930 0.0 0.0 0.4 0.0 1.6 7.1 9.3 9.7 2.7 0.4 0.8 0.0 0.0

2000 0.0 0.0 0.8 0.0 1.2 7.6 9.8 8.6 2.8 0.8 0.8 0.0 0.0

2030 0.0 0.0 0.8 0.0 1.2 6.7 10.3 9.5 4.1 0.4 0.0 0.0 0.0

2100 0.0 0.0 0.4 0.0 1.2 7.1 10.6 8.6 3.7 0.4 0.0 0.0 0.0

2130 0.0 0.0 0.4 0.0 1.6 8.0 11.5 9.9 3.2 0.4 0.0 0.0 0.0

2200 0.0 0.0 0.8 0.0 2.4 7.9 12.7 11.3 3.6 0.4 0.0 0.0 0.0

2230 0.0 0.0 0.4 0.0 2.4 8.4 13.0 11.5 4.1 0.8 0.0 0.0 0.0

2300 0.0 0.0 0.4 0.0 2.5 8.5 12.3 13.0 5.0 1.3 0.0 0.0 0.0

2330 0.0 0.8 0.4 0.0 2.9 8.4 11.4 13.4 5.4 1.6 0.0 0.0 0.0

0000 0.0 0.8 0.8 0.0 2.4 8.8 12.4 15.2 5.0 2.1 0.0 0.4 0.0

0030 0.0 0.8 0.8 0.0 3.6 8.9 13.2 15.4 5.5 2.1 0.0 0.4 0.0

0100 0.4 0.4 2.0 1.7 3.2 8.4 14.1 15.0 6.7 1.7 0.4 0.4 0.4

0130 0.0 0.4 2.0 2.9 4.1 9.2 14.1 13.4 6.7 2.5 0.9 0.8 0.0

0200 1.3 0.4 1.2 3.8 4.1 9.7 13.5 13.5 7.2 2.1 1.3 0.8 1.3

0230 1.3 0.4 1.6 3.3 4.0 10.9 14.8 13.1 6.8 2.5 2.1 0.8 1.3

0300 1.7 0.4 1.2 2.5 4.1 10.9 14.3 12.6 7.6 2.5 2.5 1.2 1.7

0330 2.1 1.2 1.2 2.5 4.5 12.1 15.3 12.2 6.8 2.9 1.7 0.8 2.1

0400 2.9 1.6 1.2 2.6 5.3 13.5 17.0 11.8 6.3 3.3 2.6 1.2 2.9

0430 2.1 0.8 1.6 2.5 6.1 12.5 16.9 12.2 5.8 3.3 2.5 1.2 2.1

0500 1.7 0.8 1.6 2.9 6.1 11.7 17.3 13.0 7.2 2.9 2.1 2.0 1.7

0530 2.5 1.6 3.6 3.0 6.5 13.0 16.6 12.6 7.1 2.4 2.5 2.4 2.5

0600 1.3 1.2 3.8 3.4 8.1 12.1 16.7 12.7 7.6 2.5 3.0 1.2 1.3

0630 0.8 0.4 3.2 2.9 8.9 14.6 19.4 11.3 7.2 3.8 1.7 1.2 0.8

0700 1.3 0.4 2.4 2.5 9.4 13.1 15.4 13.0 7.3 4.1 1.3 0.8 1.3

0730 1.3 0.0 1.2 2.1 6.9 11.7 15.3 13.1 7.7 4.1 0.4 0.4 1.3

0800 0.8 0.0 0.8 2.1 6.1 10.1 16.2 14.2 7.2 2.9 0.4 0.4 0.8

0830 0.4 0.0 0.4 1.3 4.9 9.2 15.0 13.1 7.3 2.0 0.4 0.4 0.4

0900 0.4 0.0 0.4 0.8 4.8 8.0 13.4 12.7 6.0 2.0 0.4 0.8 0.4

0930 0.4 0.0 0.4 0.9 5.3 7.9 12.9 10.2 5.4 2.0 0.0 0.0 0.4

1000 0.4 0.0 0.4 0.4 3.7 8.0 12.2 9.4 4.1 1.2 0.0 0.0 0.4

1030 0.0 0.0 0.0 0.0 2.9 5.9 11.8 10.0 4.1 1.2 0.0 0.0 0.0

1100 0.0 0.0 0.0 0.0 2.4 5.9 11.4 9.4 4.0 0.8 0.0 0.0 0.0

1130 0.0 0.0 0.0 0.0 1.6 5.1 9.3 7.0 4.0 0.8 0.0 0.0 0.0

1200 0.0 0.0 0.0 0.0 0.8 5.1 8.9 7.0 4.1 0.8 0.0 0.0 0.0

1230 0.0 0.0 0.0 0.0 0.8 5.0 8.6 5.0 2.3 0.8 0.0 0.0 0.0

1300 0.0 0.0 0.0 0.0 0.8 5.1 8.1 4.5 1.4 0.8 0.0 0.0 0.0

MEAN 0.5 0.3 0.8 0.9 3.3 8.1 11.9 10.1 4.5 1.5 0.7 0.4 0.5






MONTH/


1300 0.0 0.4 0.4 0.4 5.7 7.6 15.8 11.5 6.8 2.4 0.9 0.4 0.0

1330 0.0 0.4 0.4 0.9 6.5 7.6 14.8 11.9 6.8 2.9 1.3 0.4 0.0

1400 0.4 0.0 0.4 0.4 4.9 8.0 15.0 12.7 7.6 2.0 0.4 0.4 0.4

1430 0.4 0.0 0.4 0.4 4.5 7.6 14.7 13.1 7.3 2.8 1.3 0.4 0.4

1500 0.4 0.0 0.4 0.8 3.2 7.9 15.0 11.9 8.1 2.4 0.9 0.4 0.4

1530 0.8 0.0 0.4 0.4 4.1 8.0 14.6 12.6 8.3 2.5 1.3 0.0 0.8

1600 0.4 0.0 0.0 0.4 2.8 6.8 16.3 12.3 9.9 2.9 0.8 0.0 0.4

1630 0.8 0.0 0.0 0.8 2.4 8.1 16.3 12.0 9.5 2.0 0.8 0.0 0.8

1700 0.8 0.0 0.0 1.3 2.4 8.1 13.9 10.4 8.1 2.0 0.8 0.4 0.8

1730 0.8 0.4 0.4 1.3 3.7 10.1 12.8 13.0 8.1 2.5 1.3 0.4 0.8

1800 0.8 0.4 0.4 1.3 4.9 9.6 14.3 13.6 7.6 1.6 1.7 0.4 0.8

1830 1.3 0.0 0.8 0.8 3.3 10.1 15.0 13.8 7.1 2.1 0.8 0.4 1.3

1900 0.8 0.0 0.8 0.4 3.3 11.0 14.8 12.6 8.5 2.0 0.8 0.0 0.8

1930 1.3 0.0 0.8 0.4 2.4 10.9 14.2 14.5 6.8 2.5 1.3 0.4 1.3

2000 1.3 0.4 1.2 1.3 2.0 10.1 14.3 13.6 7.3 2.5 1.3 0.8 1.3

2030 0.8 0.4 1.2 1.7 2.4 9.6 15.6 13.6 7.7 2.5 0.9 0.8 0.8

2100 0.8 0.8 0.8 0.8 2.4 9.2 14.6 12.8 6.8 2.4 0.9 0.4 0.8

2130 0.4 0.8 0.8 1.3 2.8 9.7 16.0 13.2 6.4 2.1 0.8 1.2 0.4

2200 0.4 1.2 1.2 1.3 2.8 9.2 19.6 15.8 5.4 2.5 0.9 0.8 0.4

2230 0.4 0.8 1.2 0.8 2.8 10.9 19.1 15.6 5.5 1.3 0.8 1.2 0.4

2300 0.0 0.4 1.2 1.3 3.3 11.1 18.9 16.6 6.8 1.7 1.3 1.2 0.0

2330 0.0 1.6 1.2 1.3 3.7 10.9 18.3 17.0 7.7 2.1 1.3 1.6 0.0

0000 0.0 1.6 0.8 1.3 3.3 10.9 19.4 18.9 7.8 3.7 0.8 1.6 0.0

0030 0.0 1.6 1.2 1.3 4.9 11.8 19.8 18.3 8.3 3.8 1.3 0.8 0.0

0100 1.3 2.4 2.4 2.5 4.5 11.3 19.9 17.8 9.0 3.8 1.7 0.8 1.3

0130 0.8 2.8 2.8 4.2 5.3 11.8 19.5 16.3 8.5 4.1 1.7 1.6 0.8

0200 2.1 2.4 1.6 4.6 5.3 12.2 19.7 17.6 9.9 4.2 3.4 2.4 2.1

0230 2.1 2.8 2.8 4.2 6.1 13.4 21.7 17.6 9.5 4.6 3.4 2.4 2.1

0300 2.5 2.0 2.0 2.9 5.7 14.7 22.5 18.2 10.3 4.1 2.9 2.4 2.5

0330 3.3 2.8 2.0 3.4 6.5 15.5 23.4 17.9 9.6 5.4 2.6 2.0 3.3

0400 5.4 2.8 1.6 3.4 6.9 16.5 23.5 16.7 10.3 6.1 3.4 3.3 5.4

0430 4.2 1.6 2.0 4.2 8.6 15.8 24.6 18.7 9.3 6.5 4.2 3.6 4.2

0500 4.6 1.6 2.4 5.5 8.5 15.0 25.0 19.0 11.2 7.0 3.4 4.5 4.6

0530 7.9 2.4 4.9 5.9 9.4 16.0 23.9 19.1 10.7 5.7 4.6 4.9 7.9

0600 6.3 2.8 5.4 6.3 10.9 14.2 24.0 19.2 12.3 5.7 5.6 4.9 6.3

0630 6.3 1.6 4.9 6.3 11.7 16.7 25.9 16.7 12.7 6.7 5.1 4.1 6.3

0700 5.4 1.2 4.1 5.0 12.2 15.3 22.8 17.4 13.3 7.4 5.1 3.3 5.4

0730 5.0 1.2 4.0 5.9 10.2 14.6 23.4 18.8 13.6 7.3 4.2 2.8 5.0

0800 3.3 1.2 2.0 5.1 10.2 13.0 21.9 19.4 11.7 6.1 3.8 2.0 3.3

0830 2.5 1.2 2.0 4.2 9.7 12.6 21.5 18.9 14.1 4.5 2.5 1.2 2.5

0900 2.1 0.8 1.2 2.5 9.7 12.2 19.9 18.9 12.4 4.9 2.2 1.2 2.1

0930 1.7 0.4 1.2 3.4 9.0 12.5 22.2 15.9 13.5 4.5 1.7 0.4 1.7

1000 1.3 0.0 0.8 3.0 7.3 12.6 20.8 16.8 10.4 4.1 0.8 0.8 1.3

1030 1.3 1.2 0.8 2.5 5.8 8.8 20.3 16.2 10.4 4.1 0.8 0.8 1.3

1100 1.7 0.8 0.4 2.6 5.3 9.2 20.7 16.0 10.8 2.9 1.3 0.4 1.7

1130 1.3 0.8 0.4 1.7 5.2 8.0 18.2 12.8 11.2 2.5 1.3 0.4 1.3

1200 0.8 0.8 0.4 1.7 6.0 7.6 15.9 13.1 9.0 2.5 1.7 0.4 0.8

1230 0.4 0.4 0.8 0.9 6.1 8.4 15.1 12.1 8.3 2.5 1.3 0.4 0.4

1300 0.0 0.4 0.4 0.4 5.7 7.6 15.8 11.5 6.8 2.4 0.9 0.4 0.0

MEAN 1.8 1.0 1.4 2.3 5.6 11.0 18.7 15.4 9.2 3.6 1.9 1.4 1.8






MONTH/


1300 1.3 0.4 0.8 0.8 7.3 8.9 20.2 15.6 11.3 3.3 1.7 0.8 1.3

1330 1.3 0.8 0.4 1.7 8.6 8.8 19.7 14.3 11.4 3.7 2.1 0.8 1.3

1400 1.3 0.0 0.4 0.8 7.3 9.7 19.5 15.2 11.7 4.1 1.3 1.2 1.3

1430 1.3 0.0 0.4 1.3 7.3 9.3 20.0 15.6 10.0 3.3 1.7 1.2 1.3

1500 1.7 0.0 0.4 1.7 5.6 9.6 21.9 16.5 10.8 2.8 1.7 0.4 1.7

1530 2.1 0.0 0.4 0.8 5.3 9.7 20.7 17.2 12.0 3.3 1.7 0.0 2.1

1600 1.7 0.0 0.4 1.3 4.9 8.5 19.9 16.0 12.2 3.7 2.1 0.0 1.7

1630 2.1 0.0 0.0 1.3 3.7 10.2 20.0 14.9 12.6 4.5 2.1 0.4 2.1

1700 2.1 0.0 0.0 1.3 3.7 9.3 17.6 13.3 9.9 4.1 2.1 0.4 2.1

1730 1.7 0.8 0.4 1.7 4.5 12.2 18.6 15.0 10.8 4.1 2.5 0.4 1.7

1800 1.7 0.4 0.4 1.3 5.7 11.7 20.5 15.6 11.4 3.3 2.1 0.4 1.7

1830 2.1 0.0 0.8 2.1 4.1 12.2 21.5 16.7 10.7 2.9 1.7 0.4 2.1

1900 1.7 0.0 0.8 1.7 4.5 12.7 19.7 15.9 11.2 2.4 1.7 0.4 1.7

1930 1.3 0.0 0.8 0.8 4.1 11.8 19.5 18.5 9.5 3.3 2.1 1.2 1.3

2000 1.3 0.4 1.2 1.7 3.3 11.3 18.4 17.3 10.1 3.3 1.7 1.2 1.3

2030 0.8 0.4 1.2 1.7 3.7 11.3 20.2 17.7 11.4 3.3 1.3 1.2 0.8

2100 0.8 0.8 0.8 1.3 3.6 10.9 17.9 17.3 10.5 3.2 1.3 0.8 0.8

2130 0.4 0.8 1.2 1.3 2.8 11.8 19.3 17.7 9.6 2.5 0.8 1.6 0.4

2200 0.4 1.2 1.2 1.7 3.3 10.9 22.9 19.0 8.6 2.9 0.9 1.2 0.4

2230 0.8 0.8 1.2 1.7 3.3 12.1 22.0 19.7 10.0 2.1 1.3 2.1 0.8

2300 0.8 0.4 1.6 2.5 3.3 14.0 23.0 21.1 10.5 1.7 2.1 2.0 0.8

2330 1.3 1.6 1.2 2.5 4.1 13.8 21.5 21.9 10.9 2.1 2.1 2.4 1.3

0000 0.9 1.6 0.8 2.1 4.5 12.6 23.1 23.0 11.5 3.7 2.1 1.6 0.9

0030 0.8 1.6 1.6 2.1 5.7 13.1 23.9 23.2 12.0 4.6 1.7 1.2 0.8

0100 1.7 2.4 2.8 2.9 4.9 13.4 22.8 23.1 13.9 4.2 2.1 0.8 1.7

0130 1.3 3.2 3.3 4.2 5.7 13.4 22.8 22.0 13.5 4.6 2.2 1.6 1.3

0200 2.1 3.2 1.6 4.6 5.7 13.9 21.7 22.9 15.2 4.2 3.8 2.8 2.1

0230 2.1 3.7 2.8 4.2 6.5 15.5 24.6 23.0 14.9 5.0 4.3 2.4 2.1

0300 2.9 2.4 2.0 2.9 6.9 15.5 23.8 22.7 14.7 5.3 4.6 3.7 2.9

0330 3.8 2.8 2.4 3.4 7.3 16.3 25.0 22.4 13.2 6.6 3.4 3.3 3.8

0400 5.8 4.4 2.0 4.3 8.5 16.9 25.5 20.8 12.9 7.3 4.3 3.3 5.8

0430 4.6 3.2 2.4 5.5 9.0 16.3 27.0 22.0 13.3 7.7 5.1 4.5 4.6

0500 5.5 2.4 2.8 5.9 8.5 15.4 27.8 23.1 14.8 8.2 4.3 4.9 5.5

0530 9.6 3.2 4.9 6.3 9.4 16.8 25.5 22.0 14.3 6.5 5.4 5.7 9.6

0600 8.9 3.2 5.4 7.1 11.3 15.1 26.4 20.8 15.6 6.1 6.0 6.1 8.9

0630 7.5 2.4 4.9 6.7 12.1 17.6 28.3 19.7 15.4 7.1 5.5 5.7 7.5

0700 7.1 2.0 4.1 5.5 13.9 15.7 24.8 20.6 15.6 8.2 5.5 4.9 7.1

0730 6.3 2.4 4.8 6.3 11.8 15.0 25.8 21.2 14.9 8.1 5.5 4.1 6.3

0800 4.6 2.4 2.0 6.4 11.0 13.9 24.7 21.1 13.9 7.0 5.1 3.3 4.6

0830 4.2 2.0 2.8 5.5 10.5 13.8 24.4 20.1 16.4 5.7 4.2 3.3 4.2

0900 3.8 1.6 2.1 4.7 10.5 13.4 22.0 19.3 14.7 6.6 3.5 1.2 3.8

0930 3.3 0.8 1.2 5.1 11.8 13.8 23.8 18.0 14.8 5.7 3.0 1.2 3.3

1000 2.5 0.0 1.6 4.2 10.2 14.7 22.9 20.9 14.4 4.9 2.5 1.2 2.5

1030 2.1 1.2 1.6 3.8 8.6 10.9 23.2 19.9 14.9 4.6 2.1 1.2 2.1

1100 2.5 0.8 0.8 3.0 7.8 11.3 24.0 19.7 13.0 3.3 2.1 0.4 2.5

1130 2.1 0.8 0.8 2.1 6.9 11.0 20.2 16.5 12.6 2.9 2.5 0.8 2.1

1200 2.5 0.8 1.2 2.1 8.1 10.5 19.5 18.4 12.2 2.9 3.0 0.8 2.5

1230 2.1 0.4 0.8 1.3 7.8 10.0 18.8 17.1 12.8 3.3 2.6 0.8 2.1

1300 1.3 0.4 0.8 0.8 7.3 8.9 20.2 15.6 11.3 3.3 1.7 0.8 1.3

MEAN 2.7 1.3 1.7 3.0 6.9 12.6 22.2 19.0 12.5 4.4 2.8 1.9 2.7





2.4.3 Runway visual range and visibility in relation to the ceiling

When visibility, i.e. prevailing visibility along runway (RVR - Runway Visual Range) is less than 1500m, METAR reports includes data on RVR. RVR is a technical visibility and presents visibility distance along runway that pilot sees in final approach and landing. RVR at the aerodrome Belgrade is measured instrumentally. The most frequent cause of visibility reduction is the presence of the moisture in the atmosphere in the form of a mist, fog and rainfall. Visibility is also influenced by several other changeable parameters and different polluters. Aside from natural polluters as pollen, sea salt and other, there are artificial air polluters. In the city and industrial areas, large combustion residues are emitted into the atmosphere. When conditions are favorable for the formation of pollution (pronounced inversion and a light wind), only one source close to the landing approach zone is sufficient to lead to reduced visibility in all directions. The severity of this occurrence is affected by the concentration of the polluters and the proximity of the polluters to the runway. Relative frequency (%) of reduced visibility along runway is higher on threshold 12. Additionally, this difference along runway on threshold 12 and threshold 30 is negligibly small in summer months, whilst during winter months it amounts to several percentages. Tables 64 – 75 show relative frequency (%) of RVR at threshold 12 and horizontal visibility for certain values of vertical visibility and ceiling. Tables 76-87 show the same paramerer from the opposite direction, i.e. threshold 30. When calculating relative frequencies, data on vertical visibility are included. In all cases and for all given values, relative frequency is higher in winter and autumn months than during spring and summer. Relative frequency is higher during night time and morning period than during the day, when it is mostly non-existent.




Table 64. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 12 – January

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 12 MONTH: ITOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.8 4.5 7.8 13.5 9.8 18.0 29.5 52.9

0030 0.0 0.0 5.0 7.5 13.7 10.0 19.5 29.0 52.3

0100 0.0 0.4 3.6 6.9 13.4 9.7 18.6 28.7 52.2

0130 0.0 0.8 4.9 7.7 14.2 10.6 18.3 28.5 51.2

0200 0.0 1.2 4.5 8.2 14.7 11.0 18.4 29.4 49.8

0230 0.0 0.8 3.7 8.6 13.1 11.1 17.2 28.3 49.2

0300 0.0 0.8 3.6 8.5 11.7 10.1 16.2 29.1 50.6

0330 0.0 1.2 4.1 7.7 12.6 9.3 15.4 28.0 50.8

0400 0.0 1.2 4.9 8.2 12.7 10.2 15.5 27.3 50.2

0430 0.0 0.8 3.3 7.7 12.6 10.6 15.9 27.6 50.8

0500 0.0 0.8 2.8 7.7 12.1 10.9 16.2 27.5 49.8

0530 0.0 0.8 3.7 7.7 11.4 9.3 15.9 28.0 48.8

0600 0.0 1.2 4.1 8.2 11.0 10.2 16.3 31.4 48.6

0630 0.0 1.7 4.6 7.1 15.9 9.2 18.4 36.0 55.2

0700 0.0 1.2 5.3 6.9 18.6 9.3 21.1 38.5 56.7

0730 0.0 1.6 5.3 6.9 21.2 10.2 22.0 39.2 57.6

0800 0.0 2.0 4.9 6.5 19.8 10.5 22.3 38.1 58.7

0830 0.0 2.0 4.5 6.1 19.7 10.7 20.9 35.7 59.0

0900 0.0 2.5 3.3 5.3 16.0 8.6 18.0 34.4 57.4

0930 0.0 2.0 3.3 5.3 18.0 7.8 18.0 31.0 57.1

1000 0.0 1.6 2.5 4.1 15.2 6.1 14.8 29.5 55.7

1030 0.0 0.8 2.5 3.7 14.5 5.8 14.5 29.9 53.1

1100 0.0 0.4 0.8 2.9 12.3 5.7 14.3 28.3 52.0

1130 0.0 0.4 1.7 2.1 10.3 3.7 13.2 25.2 50.0

1200 0.0 0.4 1.2 2.0 10.2 3.7 11.5 22.5 48.4

1230 0.0 0.4 1.3 1.3 9.6 3.3 10.8 22.5 47.9

1300 0.0 0.8 1.6 1.6 8.2 3.7 9.0 21.3 48.0

1330 0.0 0.4 1.2 2.0 9.0 4.1 10.2 21.3 48.0

1400 0.0 0.4 1.2 1.6 8.2 3.3 10.7 22.1 46.7

1430 0.0 0.8 0.8 2.1 6.8 3.4 10.1 24.9 48.1

1500 0.0 0.8 1.6 2.1 7.4 3.7 10.7 24.3 48.1

1530 0.0 1.3 1.3 2.1 6.3 3.3 10.0 25.5 52.7

1600 0.0 0.4 1.6 2.5 5.3 3.3 8.6 20.6 50.6

1630 0.0 0.0 2.1 2.5 4.1 2.5 6.6 19.5 46.5

1700 0.0 0.4 1.7 2.9 5.8 4.6 7.9 17.8 45.2

1730 0.0 0.4 2.0 3.7 6.1 4.1 8.9 19.9 45.1

1800 0.0 0.0 2.9 3.7 6.6 5.3 8.6 21.0 46.9

1830 0.0 0.0 2.5 4.6 7.5 5.0 10.4 22.5 48.3

1900 0.0 0.4 4.1 6.1 9.3 5.7 10.6 22.4 46.7

1930 0.0 1.2 3.2 5.6 10.1 6.0 13.3 22.2 48.0

2000 0.0 0.4 3.3 5.3 8.6 5.3 11.9 21.4 48.6

2030 0.0 1.2 4.1 4.9 8.6 5.8 12.8 22.6 49.8

2100 0.0 0.8 3.3 4.5 7.4 5.3 11.5 23.5 49.0

2130 0.0 1.2 4.1 4.9 8.2 6.6 13.2 22.6 48.6

2200 0.0 0.4 3.6 4.9 8.9 6.1 14.6 27.5 49.8

2230 0.0 1.2 2.9 5.3 11.1 6.6 14.8 27.9 49.6

2300 0.0 0.8 3.2 6.5 10.5 7.3 16.2 27.9 51.0

2330 0.0 1.2 3.6 6.9 11.3 7.3 16.2 27.9 50.6

MEAN 0.0 0.9 3.1 5.2 11.3 7.0 14.3 26.9 50.7





TIME (UTC)

FREQUENCIES (%) OF THE OCCURENCE OF RVR/VISIBILITY (m) AND/OR HEIGHT OF THE BASE OF THE LOWEST CLOUD

LAYER OF BKN OR OVC EXTENT (ft) BELOW SPECIFIED VALUES AT SPECIFIED TIMES

RVR/Hs* VIS/Hs*




Table 65. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 12 – Frbruary

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 12 MONTH: IITOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.5 1.8 2.8 6.9 3.2 11.5 22.5 46.30030 0.0 0.9 3.2 3.7 6.9 4.6 10.1 23.0 46.50100 0.0 1.8 3.6 4.0 8.5 5.4 12.1 22.0 47.10130 0.0 0.4 2.7 3.1 8.1 4.9 12.1 22.4 47.50200 0.0 1.3 4.5 5.4 7.6 4.9 10.8 23.3 47.10230 0.0 1.4 2.7 2.7 8.1 5.4 10.8 23.4 47.30300 0.0 0.9 3.1 3.1 8.0 5.8 11.6 23.2 46.40330 0.0 2.3 3.7 5.0 9.6 6.8 11.0 22.4 46.10400 0.0 1.3 4.5 5.4 10.7 7.6 13.8 23.2 47.80430 0.0 1.8 5.3 5.3 10.2 7.6 13.8 24.4 48.00500 0.0 2.2 5.8 6.3 10.8 7.2 14.3 26.0 49.30530 0.0 1.8 4.0 5.4 10.3 7.6 16.1 27.7 51.30600 0.0 3.8 5.2 6.6 15.6 10.4 20.4 33.2 54.50630 0.0 2.7 4.1 4.5 17.2 11.3 21.3 36.2 56.60700 0.0 3.2 4.1 4.1 21.1 9.6 21.6 33.5 57.30730 0.0 0.9 4.1 5.0 19.5 9.0 20.8 35.3 57.90800 0.0 1.8 3.6 5.4 20.2 9.9 20.6 32.7 57.00830 0.0 1.4 2.3 4.1 17.7 8.2 19.5 32.7 55.90900 0.0 0.9 1.4 2.8 17.5 6.0 18.4 32.3 55.80930 0.0 0.4 0.4 1.8 14.3 3.6 15.2 31.4 52.51000 0.0 0.5 0.5 0.9 13.1 3.2 13.5 28.4 51.81030 0.0 0.0 0.5 0.9 11.3 2.3 13.1 26.6 49.51100 0.0 0.0 0.0 0.4 10.8 2.7 13.5 25.6 44.81130 0.0 0.0 0.0 0.0 11.2 2.7 12.6 24.7 43.91200 0.0 0.0 0.0 0.5 9.5 3.2 10.4 22.6 41.21230 0.0 0.0 0.0 0.9 9.2 2.3 9.2 21.6 40.41300 0.0 0.0 0.0 0.0 7.7 0.5 8.1 19.4 38.31330 0.0 0.0 0.0 0.0 5.9 0.9 6.4 19.1 38.21400 0.0 0.0 0.0 0.0 7.6 0.9 6.7 22.0 38.61430 0.0 0.0 0.0 0.0 6.4 0.5 6.4 21.5 37.91500 0.0 0.0 0.0 0.0 5.8 0.4 4.5 21.5 39.01530 0.0 0.0 0.0 0.0 3.7 0.5 4.6 21.7 40.61600 0.0 0.0 0.0 0.0 3.2 0.5 4.5 23.4 42.81630 0.0 0.0 0.0 0.0 2.3 0.5 5.0 19.4 45.51700 0.0 0.0 0.0 0.4 1.8 0.9 4.9 16.1 43.01730 0.0 0.0 0.0 0.5 1.4 0.9 3.6 14.9 41.01800 0.0 0.0 0.0 0.5 1.4 0.5 4.3 15.7 44.31830 0.0 0.0 0.0 0.9 1.8 0.9 4.5 14.7 42.01900 0.0 0.0 0.0 0.4 2.7 0.9 4.5 16.6 46.21930 0.0 0.0 0.0 0.9 4.5 0.5 6.4 15.0 46.82000 0.0 0.0 0.0 1.4 4.6 0.9 8.7 17.4 46.82030 0.0 0.0 0.5 1.8 6.4 1.8 9.5 17.7 44.52100 0.0 0.0 0.9 1.4 5.5 2.3 10.0 18.7 47.52130 0.0 0.0 1.8 2.7 6.4 3.2 9.6 19.2 46.12200 0.0 0.5 2.3 3.2 7.2 3.2 10.4 17.6 48.42230 0.0 0.9 1.8 3.2 8.2 3.6 10.9 18.6 48.22300 0.0 0.9 1.8 1.8 5.9 2.7 10.5 20.0 46.42330 0.0 0.0 0.9 2.3 6.3 2.7 11.3 21.3 44.8MEAN 0.0 0.7 1.7 2.3 8.8 3.9 11.1 23.2 46.8





TIME (UTC)RVR/Hs VIS/Hs






Table 66. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for (TDZ 12) – March

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 12 MONTH: IIITOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.0 0.4 1.2 2.1 0.8 3.3 7.1 19.90030 0.0 0.0 0.0 0.4 1.3 0.4 2.9 6.3 21.40100 0.0 0.0 0.0 0.0 0.4 0.0 2.5 7.5 21.30130 0.0 0.0 0.0 0.4 1.2 0.8 4.1 7.9 21.60200 0.0 0.0 0.4 0.8 1.7 1.3 3.8 7.6 22.00230 0.0 0.0 0.4 0.8 1.7 1.2 3.7 7.5 21.60300 0.0 0.4 1.2 1.6 1.6 1.6 4.1 6.6 22.20330 0.0 0.4 0.8 1.7 2.1 1.7 4.1 7.9 22.00400 0.0 0.0 0.4 1.2 2.0 2.0 4.9 8.6 23.70430 0.0 0.0 0.0 0.8 2.4 1.2 4.9 9.8 24.80500 0.0 0.4 1.2 2.0 3.3 1.6 5.3 12.3 32.80530 0.0 0.0 0.8 1.2 3.6 2.0 6.5 12.1 35.20600 0.0 0.0 0.4 0.4 2.9 1.2 5.7 13.9 34.80630 0.0 0.4 0.8 1.3 6.3 1.3 6.3 16.4 33.20700 0.0 0.8 0.8 0.8 4.9 1.2 5.7 13.5 33.20730 0.0 0.8 0.8 0.8 5.7 0.8 5.7 12.6 30.10800 0.0 0.4 0.8 0.8 4.5 1.2 4.5 10.7 26.20830 0.0 0.4 0.4 0.4 3.7 1.2 3.7 9.0 22.10900 0.0 0.4 0.4 0.4 1.6 1.2 2.0 7.8 19.70930 0.0 0.4 0.4 0.8 2.4 1.2 2.4 6.9 17.51000 0.0 0.4 0.4 0.4 1.6 1.2 1.6 5.8 15.21030 0.0 0.0 0.0 0.0 1.7 1.2 1.7 5.4 14.11100 0.0 0.0 0.0 0.0 1.3 0.4 2.1 4.6 13.31130 0.0 0.0 0.0 0.0 1.6 0.0 1.6 4.1 13.21200 0.0 0.0 0.0 0.0 1.6 0.8 1.2 4.5 11.91230 0.0 0.0 0.0 0.0 1.7 0.4 0.8 3.8 13.01300 0.0 0.0 0.0 0.0 1.6 0.4 1.2 4.1 11.81330 0.0 0.0 0.0 0.0 1.2 0.8 1.2 4.1 11.91400 0.0 0.0 0.0 0.0 0.8 0.0 0.8 3.3 11.51430 0.0 0.0 0.0 0.0 0.8 0.4 0.8 3.3 10.61500 0.0 0.0 0.0 0.0 1.6 0.0 0.4 3.2 10.91530 0.0 0.0 0.0 0.0 1.7 0.0 0.8 3.7 11.21600 0.0 0.0 0.0 0.0 0.4 0.0 1.2 4.1 11.21630 0.0 0.0 0.0 0.0 0.4 0.0 0.8 3.7 13.91700 0.0 0.0 0.0 0.0 0.8 0.0 1.2 4.1 13.11730 0.0 0.0 0.0 0.4 0.4 0.4 1.2 3.7 10.71800 0.0 0.0 0.0 0.4 0.8 0.4 0.8 2.9 10.21830 0.0 0.0 0.0 0.4 1.2 0.8 1.2 2.9 9.51900 0.0 0.0 0.0 0.0 1.2 0.4 1.2 3.3 11.01930 0.0 0.0 0.0 0.0 0.8 0.4 0.8 3.7 13.12000 0.0 0.0 0.0 0.0 0.4 0.4 0.8 3.7 14.02030 0.0 0.0 0.0 0.0 0.4 0.4 0.4 4.5 14.32100 0.0 0.0 0.0 0.4 0.4 0.4 0.4 3.6 16.22130 0.0 0.0 0.4 0.8 0.8 0.8 0.8 2.9 16.42200 0.0 0.0 0.4 0.8 0.8 0.8 0.8 4.1 16.82230 0.0 0.0 0.4 0.8 0.8 0.8 1.3 2.9 17.12300 0.0 0.0 0.0 0.4 1.3 0.8 1.7 4.2 17.12330 0.0 0.0 0.0 0.4 2.1 1.2 2.9 4.5 16.9MEAN 0.0 0.1 0.3 0.5 1.8 0.8 2.5 6.3 18.2











Table 67. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 12 – April

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 12 MONTH: IVTOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.5 9.70030 0.0 0.0 0.0 0.0 0.4 0.4 0.8 3.0 10.20100 0.0 0.0 0.8 0.8 0.8 0.0 1.3 3.8 11.40130 0.0 0.0 0.9 1.3 1.7 0.4 1.7 3.9 12.10200 0.0 0.0 0.9 1.3 2.1 1.3 2.6 6.0 13.20230 0.0 0.0 1.3 1.7 2.1 1.3 3.4 6.0 14.50300 0.0 0.0 0.8 1.7 2.5 2.1 4.2 6.3 16.30330 0.0 0.0 0.4 1.7 2.6 1.7 3.8 7.3 17.50400 0.0 0.0 1.7 2.1 4.3 2.6 4.7 9.4 21.90430 0.0 0.4 0.8 1.3 3.4 3.0 5.1 9.7 24.50500 0.0 0.4 1.7 1.7 3.0 2.6 5.1 10.2 25.50530 0.0 0.4 1.3 1.3 2.5 1.3 4.6 9.2 23.80600 0.0 0.4 0.4 0.4 2.1 0.9 3.9 9.4 20.20630 0.0 0.0 0.4 0.4 0.4 0.4 2.1 8.1 16.60700 0.0 0.0 0.0 0.0 0.4 0.4 1.3 7.2 16.10730 0.0 0.0 0.0 0.0 0.0 0.0 0.4 6.3 14.30800 0.0 0.0 0.0 0.0 0.0 0.0 0.4 5.5 12.30830 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.8 11.40900 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.0 7.80930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.7 7.71000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 6.41030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 6.31100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 6.41130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 6.41200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.7 5.61230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 5.11300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.9 4.71330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 6.81400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.61430 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 5.91500 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.9 6.41530 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.3 4.31600 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.8 5.11630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 5.51700 0.0 0.0 0.0 0.0 0.0 0.0 0.8 0.8 5.11730 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.1 5.91800 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.1 4.71830 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.3 4.71900 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.3 4.21930 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.7 5.52000 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.3 4.72030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.1 4.72100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.7 5.12130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 5.12200 0.0 0.0 0.0 0.4 0.4 0.4 0.4 2.1 6.42230 0.0 0.0 0.0 0.0 0.0 0.4 0.4 2.1 7.62300 0.0 0.0 0.0 0.0 0.4 0.0 0.0 2.5 8.92330 0.0 0.0 0.4 0.4 0.4 0.0 0.4 2.6 8.9MEAN 0.0 0.0 0.2 0.3 0.6 0.4 1.1 3.4 9.7











Table 68. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 12 – May

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 12 MONTH: VTOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.4 5.30030 0.0 0.0 0.0 0.0 0.4 0.0 0.8 2.0 5.30100 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.0 5.30130 0.0 0.0 0.0 0.0 0.4 0.0 0.8 2.4 6.10200 0.0 0.0 0.0 0.0 0.8 0.4 1.6 3.3 6.10230 0.0 0.0 0.0 0.0 0.4 0.0 1.2 3.3 8.20300 0.0 0.0 0.0 0.0 0.0 0.0 1.6 4.1 12.20330 0.0 0.0 0.0 0.4 0.4 0.4 2.8 5.3 16.30400 0.0 0.0 0.0 0.0 1.2 0.0 2.0 7.0 18.40430 0.0 0.0 0.0 0.0 0.8 0.4 1.6 6.1 19.00500 0.0 0.0 0.0 0.0 1.2 0.4 2.9 6.1 18.00530 0.0 0.0 0.0 0.0 1.2 0.0 2.4 5.7 14.70600 0.0 0.0 0.0 0.0 0.0 0.0 1.2 5.3 11.40630 0.0 0.0 0.0 0.0 0.0 0.0 1.2 4.1 9.40700 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.3 10.20730 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.8 7.30800 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.0 6.10830 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.2 5.30900 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.2 3.30930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.91000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.11030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.31100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.31130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.61200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.51230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.21300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.41330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.01400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.91430 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.4 2.01500 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.41530 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.01600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.41630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.71700 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.71730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.71800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 6.51830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 6.11900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.91930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 5.32000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 5.32030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.52100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.02130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 4.92200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 4.92230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.6 4.52300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.6 5.32330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.4 5.7MEAN 0.0 0.0 0.0 0.0 0.1 0.0 0.5 1.8 6.2











Table 69. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 12 – June

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 12 MONTH: VITOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.0 0.0 0.0 0.4 0.4 0.4 0.9 3.40030 0.0 0.0 0.0 0.0 0.4 0.0 0.4 1.3 4.60100 0.0 0.0 0.0 0.0 0.4 0.0 0.8 2.1 5.00130 0.0 0.0 0.0 0.0 0.4 0.0 0.4 1.7 5.40200 0.0 0.0 0.0 0.4 0.4 0.0 1.7 3.0 7.60230 0.0 0.0 0.0 0.0 1.3 0.0 1.7 2.9 7.50300 0.0 0.0 0.0 0.0 1.3 0.4 2.1 3.8 13.80330 0.0 0.0 0.0 0.4 1.3 0.8 2.5 4.6 16.70400 0.0 0.0 0.0 0.0 0.8 0.4 4.2 5.8 15.80430 0.0 0.0 0.0 0.4 0.8 0.8 2.9 5.4 14.20500 0.0 0.0 0.0 0.0 0.8 0.8 2.5 5.5 13.40530 0.0 0.0 0.0 0.0 0.8 0.0 2.9 8.3 14.60600 0.0 0.0 0.0 0.0 0.4 0.0 1.7 7.2 12.20630 0.0 0.0 0.0 0.0 0.0 0.0 0.8 6.3 10.80700 0.0 0.0 0.0 0.0 0.4 0.0 1.3 5.9 11.30730 0.0 0.0 0.0 0.0 0.0 0.0 1.3 5.0 10.00800 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.3 8.80830 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.5 6.70900 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.5 5.90930 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.7 5.01000 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.7 4.61030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 3.31100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.7 3.81130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 2.91200 0.0 0.0 0.0 0.0 0.4 0.0 0.0 0.8 2.91230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.21300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.91330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.31400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.91430 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.51500 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.81530 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.81600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 5.51630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.21700 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.21730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.81800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.81830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 4.61900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.91930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 3.32000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 2.92030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.72100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.72130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.92200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.52230 0.0 0.0 0.0 0.4 0.4 0.4 0.4 0.8 3.32300 0.0 0.0 0.0 0.4 0.4 0.4 0.4 0.4 3.42330 0.0 0.0 0.0 0.4 0.4 0.4 0.4 0.8 3.4MEAN 0.0 0.0 0.0 0.1 0.2 0.1 0.7 2.1 6.0











Table 70. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 12 – July

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 12 MONTH: VIITOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.0 0.0 0.0 0.4 0.0 0.8 1.6 4.80030 0.0 0.0 0.0 0.0 0.4 0.0 0.8 1.6 5.30100 0.0 0.0 0.0 0.0 0.4 0.0 0.4 2.8 6.50130 0.0 0.0 0.0 0.0 0.4 0.0 0.4 3.2 7.30200 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.8 8.90230 0.0 0.0 0.0 0.4 0.4 0.4 0.8 3.7 10.60300 0.0 0.0 0.0 0.0 0.8 0.0 0.8 3.7 13.50330 0.0 0.0 0.4 0.4 0.8 0.4 1.6 4.9 18.60400 0.0 0.0 0.4 0.4 1.6 0.8 2.4 5.6 17.70430 0.0 0.0 0.0 0.4 0.8 0.8 1.6 3.6 16.90500 0.0 0.0 0.0 0.0 0.4 0.4 1.6 2.8 13.30530 0.0 0.0 0.0 0.0 1.2 0.4 1.6 2.8 11.70600 0.0 0.0 0.0 0.0 0.4 0.0 1.2 2.8 9.30630 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.0 8.90700 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.2 8.60730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 5.30800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 3.30830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 2.80900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.00930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.01000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.81030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 1.61100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.21130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.61200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.21230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.41300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.41330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.21400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.81430 0.0 0.0 0.0 0.0 0.4 0.0 0.0 0.0 0.81500 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.41530 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.81600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.81630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.21700 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.61730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.41800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.21830 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.4 1.61900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.81930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.22000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.62030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.82100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.72130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.22200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 2.02230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.32300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.82330 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.6 4.5MEAN 0.0 0.0 0.0 0.0 0.2 0.1 0.3 1.3 4.5











Table 71. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 12 – August

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 12 MONTH: VIIITOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.0 0.0 0.0 0.0 0.0 0.8 0.8 5.40030 0.0 0.0 0.0 0.4 0.8 0.4 1.2 1.6 5.70100 0.0 0.0 0.0 0.4 1.6 0.8 2.4 3.6 6.50130 0.0 0.0 0.4 1.2 1.6 1.2 2.8 4.1 6.90200 0.0 0.0 0.0 0.4 2.0 1.6 3.3 3.7 7.70230 0.0 0.0 0.0 1.6 2.4 2.0 3.2 4.4 8.90300 0.0 0.0 0.4 1.2 1.2 1.6 2.4 3.6 10.50330 0.0 0.0 0.4 1.2 1.6 0.8 2.0 4.9 14.60400 0.0 0.0 0.8 1.2 1.6 0.8 2.4 4.9 19.40430 0.0 0.4 0.8 2.0 2.0 1.6 2.0 4.9 19.80500 0.0 0.4 0.8 1.2 3.3 2.0 2.8 5.3 18.70530 0.0 0.0 1.2 1.2 2.8 2.0 4.0 6.5 16.60600 0.0 0.0 0.8 1.3 3.3 1.7 5.0 6.7 13.30630 0.0 0.0 0.4 0.4 2.0 0.8 3.2 5.7 10.50700 0.0 0.0 0.0 0.0 0.8 0.4 2.4 4.9 8.60730 0.0 0.0 0.0 0.0 0.4 0.0 1.6 4.8 10.10800 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.9 6.50830 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.0 6.10900 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.2 5.00930 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.2 3.71000 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.8 5.61030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 5.71100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.91130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.91200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.51230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.41300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.01330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.41400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.61430 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.21500 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.21530 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.61600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.01630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.01700 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.51730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.41800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.11830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.01900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.61930 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.8 2.02000 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.2 2.42030 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.6 3.62100 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.8 3.72130 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.8 4.52200 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.2 3.72230 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.2 4.92300 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.2 5.72330 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.2 4.5MEAN 0.0 0.0 0.1 0.3 0.6 0.4 1.0 2.0 6.0











Table 72. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 12 – September

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 12 MONTH: IXTOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.0 0.4 0.4 0.4 0.0 0.4 2.1 8.80030 0.0 0.0 0.0 0.0 0.4 0.0 0.8 3.8 10.00100 0.0 0.0 0.0 0.0 1.3 0.8 2.5 3.8 13.90130 0.0 0.0 0.4 0.8 1.3 0.8 3.8 5.0 13.90200 0.0 0.0 0.8 0.8 0.8 0.8 3.8 5.5 15.50230 0.0 0.0 0.4 0.8 1.7 1.3 4.2 6.3 16.70300 0.0 0.0 0.4 2.1 3.3 1.7 4.6 6.7 17.20330 0.0 0.0 1.3 1.7 2.9 1.3 4.6 8.4 18.50400 0.0 0.0 0.9 1.7 3.8 2.1 5.1 7.7 22.10430 0.0 0.0 1.3 1.7 3.8 2.5 5.9 11.4 30.00500 0.0 0.0 1.3 1.3 3.8 2.9 5.5 12.6 32.40530 0.0 0.0 0.8 1.3 2.1 1.7 4.6 11.0 30.40600 0.0 0.0 1.3 1.3 2.1 2.1 4.6 9.2 29.80630 0.0 0.0 0.8 1.3 2.5 1.7 3.8 7.9 26.80700 0.0 0.0 0.4 0.8 2.1 1.3 3.4 6.3 20.60730 0.0 0.0 0.4 0.8 1.7 0.4 2.5 7.1 19.70800 0.0 0.0 0.0 0.0 1.3 0.4 2.1 5.9 14.80830 0.0 0.0 0.0 0.0 0.4 0.0 1.3 4.2 11.80900 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.0 11.90930 0.0 0.0 0.0 0.0 0.0 0.0 0.9 3.8 11.51000 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.0 8.41030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.5 8.91100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.6 8.51130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.7 5.51200 0.0 0.0 0.0 0.0 0.4 0.0 0.0 2.1 4.61230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.9 4.71300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.81330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.7 3.81400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.11430 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.01500 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.81530 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.41600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.21630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 6.31700 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.7 5.91730 0.0 0.0 0.0 0.0 0.4 0.0 0.4 1.7 5.51800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 3.31830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.21900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.81930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.92000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 3.42030 0.0 0.0 0.0 0.0 0.0 0.4 0.4 2.1 4.22100 0.0 0.0 0.0 0.4 0.4 0.4 0.4 1.3 3.82130 0.0 0.0 0.0 0.0 0.4 0.0 0.4 1.7 4.22200 0.0 0.0 0.0 0.0 0.4 0.0 0.4 1.7 5.02230 0.0 0.0 0.0 0.0 0.4 0.4 0.4 1.3 7.12300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 8.42330 0.0 0.0 0.4 0.4 0.4 0.0 0.0 1.7 8.5MEAN 0.0 0.0 0.2 0.4 0.8 0.5 1.4 3.5 10.8











Table 73. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 12 – October

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 12 MONTH: XTOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.0 0.4 1.6 2.9 2.4 4.1 7.8 24.10030 0.0 0.0 0.4 2.4 3.6 3.2 5.7 8.1 25.10100 0.0 0.4 1.2 2.4 4.5 3.2 5.3 8.9 25.50130 0.0 0.4 1.2 2.8 4.5 2.8 6.1 10.2 26.40200 0.0 0.4 2.0 2.9 4.9 3.3 6.1 10.7 27.00230 0.0 0.4 0.4 2.8 4.9 3.2 6.5 10.9 29.60300 0.0 0.4 1.2 3.3 5.7 2.8 6.5 12.2 31.70330 0.0 0.4 1.2 3.7 6.5 4.5 7.3 12.6 32.10400 0.0 0.8 1.2 3.2 6.1 3.6 8.1 15.0 33.60430 0.0 0.8 3.3 5.7 7.3 5.3 9.4 18.0 37.10500 0.0 0.8 2.4 5.7 9.3 6.1 12.6 23.5 42.50530 0.0 0.0 1.6 4.5 10.2 6.9 13.1 24.1 46.50600 0.0 0.8 2.8 5.7 10.5 6.5 14.6 24.3 49.00630 0.0 0.4 0.8 4.5 10.5 6.5 13.8 23.1 48.60700 0.0 0.4 1.2 2.0 6.9 4.5 11.8 21.2 43.30730 0.0 0.0 0.4 0.4 4.5 2.4 8.9 17.1 38.60800 0.0 0.0 0.4 0.4 3.7 1.6 6.9 15.5 36.70830 0.0 0.0 0.0 0.4 2.4 0.8 5.7 12.1 33.20900 0.0 0.0 0.0 0.0 2.0 0.8 5.6 12.1 30.20930 0.0 0.0 0.0 0.0 1.6 0.8 5.7 9.8 27.31000 0.0 0.0 0.0 0.0 1.2 0.0 4.1 7.3 22.41030 0.0 0.0 0.0 0.0 0.0 0.0 3.3 6.6 21.41100 0.0 0.0 0.0 0.0 0.0 0.0 2.9 6.5 22.01130 0.0 0.0 0.0 0.0 0.0 0.0 2.0 6.5 21.01200 0.0 0.0 0.0 0.0 0.0 0.0 1.2 6.5 18.11230 0.0 0.0 0.0 0.0 0.0 0.0 1.2 6.6 17.61300 0.0 0.0 0.0 0.0 0.0 0.0 1.2 6.9 15.41330 0.0 0.0 0.0 0.0 0.4 0.0 2.0 7.3 15.51400 0.0 0.0 0.0 0.0 0.4 0.0 2.0 5.3 15.41430 0.0 0.0 0.0 0.0 0.4 0.0 2.0 4.9 15.81500 0.0 0.0 0.0 0.0 0.4 0.0 2.0 4.8 15.31530 0.0 0.0 0.0 0.0 0.0 0.0 2.4 5.7 16.31600 0.0 0.0 0.0 0.0 0.0 0.0 1.6 4.0 19.41630 0.0 0.0 0.0 0.0 0.8 0.0 1.6 3.3 17.11700 0.0 0.0 0.0 0.0 0.8 0.0 2.0 3.3 18.01730 0.0 0.0 0.0 0.0 0.8 0.0 2.0 4.5 17.61800 0.0 0.0 0.0 0.4 0.8 0.4 2.5 5.3 18.41830 0.0 0.0 0.0 0.4 0.8 0.4 2.0 3.3 19.91900 0.0 0.0 0.0 0.4 0.8 0.4 1.6 4.1 20.71930 0.0 0.0 0.0 0.8 0.8 0.8 2.0 2.9 20.42000 0.0 0.0 0.8 1.2 1.2 1.2 2.0 3.7 20.72030 0.0 0.0 0.4 0.4 1.6 0.8 2.0 4.5 22.02100 0.0 0.0 0.0 0.4 2.4 0.8 2.4 4.0 21.92130 0.0 0.0 1.2 1.2 2.4 1.2 2.4 4.0 21.52200 0.0 0.0 1.2 1.2 2.4 1.2 3.3 4.5 20.32230 0.0 0.0 0.4 1.2 2.4 1.6 3.3 4.9 22.02300 0.0 0.0 0.8 1.6 3.3 1.6 2.9 7.0 22.22330 0.0 0.0 0.4 1.2 2.9 1.6 3.7 7.8 23.3MEAN 0.0 0.1 0.6 1.4 2.9 1.7 4.7 9.2 25.6











Table 74. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 12 – November

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 12 MONTH: XITOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 1.3 3.8 6.7 13.0 7.9 13.0 20.9 37.20030 0.0 1.7 4.6 8.4 13.9 9.3 14.8 23.2 36.30100 0.0 0.8 6.7 10.5 15.1 10.0 14.6 24.3 37.70130 0.0 1.7 6.7 13.4 16.0 13.0 16.4 26.1 37.40200 0.0 1.7 7.1 11.8 16.4 13.0 16.4 26.5 38.70230 0.0 1.7 6.7 12.2 17.2 13.4 18.1 26.5 37.80300 0.0 1.7 4.6 10.5 18.1 13.4 18.9 27.7 40.30330 0.0 1.7 7.1 12.1 18.8 13.4 19.7 29.3 40.20400 0.0 0.4 6.3 12.7 19.4 13.9 20.3 30.0 40.90430 0.0 0.4 5.4 10.0 17.9 13.3 20.0 30.8 40.40500 0.0 1.3 6.7 10.8 18.3 14.2 20.4 29.6 41.70530 0.0 2.1 7.1 13.0 20.6 16.4 23.9 31.9 45.00600 0.0 3.3 7.9 13.4 21.8 16.7 25.9 36.4 49.40630 0.0 4.6 8.4 13.8 23.4 15.9 26.4 36.4 50.20700 0.0 4.2 8.9 12.7 20.3 14.8 23.7 34.7 48.70730 0.0 2.5 6.3 8.3 16.7 11.7 19.6 32.1 47.50800 0.0 2.5 6.3 8.4 15.5 9.7 16.8 27.3 45.40830 0.0 2.5 5.9 7.1 13.0 8.4 13.8 24.3 44.80900 0.0 1.3 4.2 6.7 12.2 7.6 13.4 22.3 41.60930 0.0 0.4 3.8 5.0 10.0 5.8 10.4 20.8 40.81000 0.0 0.4 2.5 4.2 7.6 5.5 9.2 18.1 37.81030 0.0 0.4 2.1 3.4 7.1 3.8 7.6 15.1 34.91100 0.0 0.4 2.5 3.3 5.9 3.3 6.3 13.0 33.51130 0.0 0.4 1.7 2.5 5.1 3.4 5.9 12.2 31.61200 0.0 0.4 0.8 1.7 5.1 3.4 5.9 11.4 27.81230 0.0 0.4 0.8 2.1 5.9 2.5 6.3 11.3 28.51300 0.0 0.4 0.8 1.7 6.8 3.0 6.8 12.2 28.31330 0.0 0.8 0.8 1.7 5.5 2.9 6.3 13.0 27.31400 0.0 0.8 1.3 2.1 5.0 3.4 6.3 13.4 27.71430 0.0 1.3 1.3 1.7 5.1 3.0 6.8 13.1 30.51500 0.0 1.3 1.7 2.1 4.6 3.3 7.1 15.1 34.31530 0.0 1.3 2.1 3.4 5.1 4.2 5.9 13.5 37.11600 0.0 1.3 2.5 3.0 5.1 3.8 6.4 10.2 32.61630 0.0 0.8 2.5 3.0 5.9 3.8 6.8 11.9 32.61700 0.0 1.3 2.5 3.0 5.1 3.8 5.5 11.0 31.81730 0.0 1.3 2.5 3.0 5.9 3.4 6.3 13.9 32.91800 0.0 0.8 2.5 2.9 6.3 3.3 6.7 13.8 34.31830 0.0 0.8 2.9 4.2 6.7 4.6 8.0 16.0 34.91900 0.0 0.4 3.0 5.1 7.6 5.5 8.9 16.9 36.31930 0.0 0.4 3.8 5.5 8.0 5.5 8.4 16.8 35.32000 0.0 0.8 2.9 5.5 9.2 5.5 9.2 15.5 34.92030 0.0 0.4 4.2 5.0 10.0 5.9 9.6 18.0 35.62100 0.0 0.4 3.3 5.4 9.6 5.9 10.0 17.6 36.42130 0.0 0.4 3.8 6.3 10.5 7.6 10.5 18.9 38.22200 0.0 0.0 2.9 6.7 11.3 6.7 10.0 18.8 37.22230 0.0 0.0 3.3 7.1 10.9 7.5 10.9 19.7 37.72300 0.0 0.9 3.8 7.7 12.8 7.7 11.5 20.9 38.32330 0.0 1.3 3.3 6.7 12.1 7.5 12.1 20.9 38.9MEAN 0.0 1.2 4.0 6.6 11.3 7.7 12.2 20.5 37.3











Table 75. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 12 – December (ICAO

Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 12 MONTH: XIITOTAL NUMBER OF OBSERVATIONS: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 1.7 4.5 7.0 14.0 9.5 19.8 32.6 55.80030 0.0 0.8 3.7 6.2 14.0 9.5 19.3 31.3 55.10100 0.0 0.4 3.3 5.8 12.4 8.7 18.3 30.7 53.50130 0.0 0.4 4.1 5.0 10.8 8.7 18.3 28.6 51.50200 0.0 0.4 4.1 5.7 11.5 8.6 18.9 30.3 52.90230 0.0 0.4 4.1 7.0 12.3 9.4 19.7 31.1 54.50300 0.0 0.4 4.5 8.2 11.5 8.6 18.0 32.0 55.70330 0.0 0.8 4.0 6.9 12.1 8.5 18.5 31.5 54.80400 0.0 0.0 3.2 5.7 13.4 8.1 22.3 30.4 55.10430 0.0 0.4 3.6 6.9 12.5 10.1 21.0 31.0 55.60500 0.0 0.0 2.0 6.9 12.5 9.7 21.0 31.0 53.20530 0.0 0.4 3.6 7.3 14.2 10.5 21.5 32.0 51.40600 0.0 0.4 3.7 6.5 11.4 9.3 21.1 34.1 55.30630 0.0 0.4 4.9 8.1 14.6 9.7 25.5 40.1 60.30700 0.0 0.4 5.3 7.3 15.9 9.3 22.4 40.7 59.80730 0.0 0.8 4.4 6.9 17.3 8.5 23.0 42.3 60.10800 0.0 0.8 3.6 6.9 17.0 10.1 23.5 40.1 60.30830 0.0 1.6 3.7 6.1 17.5 11.0 21.1 37.4 61.00900 0.0 0.8 3.7 4.5 15.4 9.3 19.5 34.6 57.70930 0.0 0.8 3.2 4.8 14.5 8.5 17.7 35.9 56.51000 0.0 1.2 2.9 3.7 14.3 7.8 17.6 31.4 54.31030 0.0 0.8 1.6 3.3 12.2 7.7 15.4 31.3 51.21100 0.0 0.4 1.6 2.8 12.2 6.9 14.6 30.1 49.61130 0.0 0.4 1.6 3.2 10.1 6.9 11.7 27.9 49.01200 0.0 0.4 0.8 3.3 9.8 6.1 11.8 25.2 48.01230 0.0 0.4 0.4 2.0 10.2 5.7 12.7 25.7 46.91300 0.0 0.4 1.2 2.0 8.5 4.0 13.0 25.9 47.81330 0.0 0.4 1.2 1.6 8.2 3.3 11.5 26.2 47.11400 0.0 0.8 1.6 2.0 8.5 3.3 10.6 25.2 46.71430 0.0 1.2 1.2 2.4 6.5 4.5 10.6 24.9 48.21500 0.0 0.8 1.2 2.0 6.9 4.0 11.7 25.9 51.81530 0.0 1.2 1.2 2.8 4.9 4.1 11.0 24.0 52.41600 0.0 1.2 1.2 2.0 5.7 2.8 10.2 22.4 48.41630 0.0 1.2 1.2 2.4 6.5 4.1 10.2 22.4 49.41700 0.0 0.8 1.2 2.4 5.7 3.7 8.6 20.0 51.01730 0.0 0.8 1.2 2.9 7.0 4.5 8.7 19.4 50.81800 0.0 0.8 1.6 4.1 7.8 4.5 10.2 20.9 51.61830 0.0 0.8 2.4 4.0 8.1 4.0 10.9 20.6 53.01900 0.0 1.2 2.0 3.7 8.2 5.7 11.9 20.9 50.01930 0.0 1.2 2.4 5.3 7.3 6.1 10.6 20.7 50.82000 0.0 1.6 3.3 6.6 9.8 7.0 12.7 19.7 52.52030 0.0 1.6 3.7 6.6 11.9 7.8 14.0 21.4 53.92100 0.0 1.2 4.1 6.5 11.0 7.7 13.4 21.5 54.52130 0.0 0.4 3.3 4.9 12.3 7.8 13.9 24.6 56.62200 0.0 0.4 3.7 5.3 12.7 7.8 15.1 29.4 55.92230 0.0 1.2 3.3 6.5 12.6 9.3 16.7 28.0 56.52300 0.0 0.8 3.3 6.1 13.9 9.4 18.0 30.7 54.52330 0.0 1.2 3.3 6.9 14.6 10.6 17.5 30.9 55.3MEAN 0.0 0.8 2.8 4.9 11.3 7.4 15.9 28.7 53.3











Table 76. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 30 – January

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 30 MONTH: ITOTAL NUMBERS OF OBSERVATION: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.8 3.7 6.6 13.9 9.8 18.0 29.5 52.90030 0.0 0.8 4.1 6.6 14.1 10.0 19.5 29.0 52.30100 0.0 0.0 4.5 6.9 13.0 9.7 18.6 28.7 52.20130 0.0 0.8 4.9 7.7 14.6 10.6 18.3 28.5 51.20200 0.0 0.8 4.1 8.6 13.5 11.0 18.4 29.4 49.80230 0.0 1.2 5.3 9.4 13.1 11.1 17.2 28.3 49.20300 0.0 0.8 3.2 8.1 11.7 10.1 16.2 29.1 50.60330 0.0 1.2 3.3 7.7 11.8 9.3 15.4 28.0 50.80400 0.0 1.2 5.3 9.4 13.5 10.2 15.5 27.3 50.20430 0.0 1.2 4.9 9.3 13.4 10.6 15.9 27.6 50.80500 0.0 1.2 4.9 8.5 12.1 10.9 16.2 27.5 49.80530 0.0 0.8 4.1 7.7 12.2 9.3 15.9 28.0 48.80600 0.0 0.4 3.3 7.3 12.7 10.2 16.3 31.4 48.60630 0.0 1.3 3.8 6.7 15.5 9.2 18.4 36.0 55.20700 0.0 2.0 4.9 5.7 17.4 9.3 21.1 38.5 56.70730 0.0 2.9 4.9 6.9 18.8 10.2 22.0 39.2 57.60800 0.0 2.8 4.9 6.5 20.6 10.5 22.3 38.1 58.70830 0.0 2.9 3.7 4.9 20.9 10.7 20.9 35.7 59.00900 0.0 2.5 3.3 5.3 19.7 8.6 18.0 34.4 57.40930 0.0 2.0 2.9 4.5 18.0 7.8 18.0 31.0 57.11000 0.0 2.0 2.9 4.5 14.3 6.1 14.8 29.5 55.71030 0.0 1.2 2.5 3.3 13.7 5.8 14.5 29.9 53.11100 0.0 0.8 1.6 2.9 11.9 5.7 14.3 28.3 52.01130 0.0 0.8 0.8 1.7 10.3 3.7 13.2 25.2 50.01200 0.0 0.4 1.2 1.6 9.4 3.7 11.5 22.5 48.41230 0.0 0.0 0.8 1.3 8.3 3.3 10.8 22.5 47.91300 0.0 0.0 1.2 1.2 8.2 3.7 9.0 21.3 48.01330 0.0 0.4 1.6 1.6 8.2 4.1 10.2 21.3 48.01400 0.0 0.4 1.2 1.6 8.2 3.3 10.7 22.1 46.71430 0.0 0.8 1.3 1.7 7.2 3.4 10.1 24.9 48.11500 0.0 0.8 1.2 2.1 7.0 3.7 10.7 24.3 48.11530 0.0 1.3 1.3 2.1 5.4 3.3 10.0 25.5 52.71600 0.0 0.8 2.1 2.9 4.9 3.3 8.6 20.6 50.61630 0.0 0.4 2.1 2.9 4.1 2.5 6.6 19.5 46.51700 0.0 0.4 2.1 2.9 5.4 4.6 7.9 17.8 45.21730 0.0 0.0 1.6 3.7 6.1 4.1 8.9 19.9 45.11800 0.0 0.0 2.1 3.3 6.2 5.3 8.6 21.0 46.91830 0.0 0.0 2.5 4.2 7.9 5.0 10.4 22.5 48.31900 0.0 0.8 3.7 5.3 8.1 5.7 10.6 22.4 46.71930 0.0 0.8 4.0 5.2 10.1 6.0 13.3 22.2 48.02000 0.0 0.8 3.7 6.2 8.2 5.3 11.9 21.4 48.62030 0.0 1.2 3.3 5.3 8.6 5.8 12.8 22.6 49.82100 0.0 1.2 2.9 4.9 8.6 5.3 11.5 23.5 49.02130 0.0 2.1 3.7 4.9 8.2 6.6 13.2 22.6 48.62200 0.0 1.2 3.6 4.5 8.9 6.1 14.6 27.5 49.82230 0.0 0.8 3.7 5.3 10.7 6.6 14.8 27.9 49.62300 0.0 0.8 3.2 6.1 10.5 7.3 16.2 27.9 51.02330 0.0 0.8 3.6 6.5 12.1 7.3 16.2 27.9 50.6MEAN 0.0 1.0 3.1 5.1 11.3 7.0 14.3 26.9 50.7





TIME (UTC)

FREQUENCIES (%) OF THE OCCURENCE OF RANWAY VISUAL RANGE/VISIBILITY (m) AND VERTICAL VISIBILITY AND

HEIGHT OF THE BASE OF THE LOWEST CLOUD LAYER (ft) OF BKN OR OVC EXTENT BELOW SPECIFIED VALUES AT

SPECIFIED TIME

RVR/Hs VIS/Hs




Table 77. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 30 – February

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 30 MONTH: IITOTAL NUMBERS OF OBSERVATION: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.9 1.4 2.3 6.4 3.2 11.5 22.5 46.30030 0.0 0.5 2.3 2.8 7.4 4.6 10.1 23.0 46.50100 0.0 1.3 2.2 3.1 6.3 5.4 12.1 22.0 47.10130 0.0 1.3 4.0 4.5 8.1 4.9 12.1 22.4 47.50200 0.0 1.8 3.1 4.5 7.2 4.9 10.8 23.3 47.10230 0.0 1.4 2.7 3.2 7.2 5.4 10.8 23.4 47.30300 0.0 1.3 2.7 3.1 7.6 5.8 11.6 23.2 46.40330 0.0 0.9 2.7 4.6 9.6 6.8 11.0 22.4 46.10400 0.0 1.3 4.9 6.3 11.2 7.6 13.8 23.2 47.80430 0.0 2.2 5.8 6.2 10.7 7.6 13.8 24.4 48.00500 0.0 2.2 4.9 6.7 10.3 7.2 14.3 26.0 49.30530 0.0 2.7 4.9 7.6 11.2 7.6 16.1 27.7 51.30600 0.0 3.8 5.2 7.1 16.6 10.4 20.4 33.2 54.50630 0.0 4.1 5.0 6.3 19.0 11.3 21.3 36.2 56.60700 0.0 4.1 5.0 6.9 20.2 9.6 21.6 33.5 57.30730 0.0 3.2 5.0 5.9 19.5 9.0 20.8 35.3 57.90800 0.0 1.8 4.5 4.5 19.3 9.9 20.6 32.7 57.00830 0.0 0.9 2.7 3.6 17.3 8.2 19.5 32.7 55.90900 0.0 0.5 1.8 2.3 17.1 6.0 18.4 32.3 55.80930 0.0 0.0 0.4 1.3 14.8 3.6 15.2 31.4 52.51000 0.0 0.0 0.9 1.8 11.7 3.2 13.5 28.4 51.81030 0.0 0.0 0.0 1.8 11.7 2.3 13.1 26.6 49.51100 0.0 0.0 0.0 0.9 10.3 2.7 13.5 25.6 44.81130 0.0 0.0 0.0 0.4 10.8 2.7 12.6 24.7 43.91200 0.0 0.0 0.0 1.4 11.3 3.2 10.4 22.6 41.21230 0.0 0.0 0.5 1.4 10.6 2.3 9.2 21.6 40.41300 0.0 0.0 0.0 0.5 7.7 0.5 8.1 19.4 38.31330 0.0 0.0 0.0 0.0 6.4 0.9 6.4 19.1 38.21400 0.0 0.0 0.0 0.0 8.1 0.9 6.7 22.0 38.61430 0.0 0.0 0.0 0.0 6.4 0.5 6.4 21.5 37.91500 0.0 0.0 0.0 0.0 5.4 0.4 4.5 21.5 39.01530 0.0 0.0 0.0 0.0 3.7 0.5 4.6 21.7 40.61600 0.0 0.0 0.0 0.0 3.6 0.5 4.5 23.4 42.81630 0.0 0.0 0.0 0.0 1.4 0.5 5.0 19.4 45.51700 0.0 0.0 0.0 0.4 1.8 0.9 4.9 16.1 43.01730 0.0 0.0 0.0 0.5 1.4 0.9 3.6 14.9 41.01800 0.0 0.0 0.0 0.5 1.4 0.5 4.3 15.7 44.31830 0.0 0.0 0.0 0.9 1.8 0.9 4.5 14.7 42.01900 0.0 0.0 0.0 0.4 1.8 0.9 4.5 16.6 46.21930 0.0 0.0 0.0 0.5 4.1 0.5 6.4 15.0 46.82000 0.0 0.5 0.5 0.9 5.0 0.9 8.7 17.4 46.82030 0.0 0.5 1.4 2.3 6.8 1.8 9.5 17.7 44.52100 0.0 0.5 0.9 1.8 5.9 2.3 10.0 18.7 47.52130 0.0 1.4 2.3 2.7 5.0 3.2 9.6 19.2 46.12200 0.0 0.5 1.4 3.2 7.2 3.2 10.4 17.6 48.42230 0.0 0.0 0.9 2.3 5.9 3.6 10.9 18.6 48.22300 0.0 0.5 1.8 2.3 7.3 2.7 10.5 20.0 46.42330 0.0 1.4 1.4 2.3 6.3 2.7 11.3 21.3 44.8MEAN 0.0 0.9 1.7 2.5 8.7 3.9 11.1 23.2 46.8





RVR/Hs VIS/Hs



SPECIFIED TIME

TIME (UTC)




Table 78. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 30 – March

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 30 MONTH: IIITOTAL NUMBERS OF OBSERVATION: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.0 0.4 0.8 2.1 0.8 3.3 7.1 19.90030 0.0 0.0 0.0 0.4 1.3 0.4 2.9 6.3 21.40100 0.0 0.0 0.0 0.0 0.4 0.0 2.5 7.5 21.30130 0.0 0.0 0.4 0.8 1.7 0.8 4.1 7.9 21.60200 0.0 0.0 0.4 0.4 2.1 1.3 3.8 7.6 22.00230 0.0 0.0 0.8 1.2 1.7 1.2 3.7 7.5 21.60300 0.0 0.4 1.2 1.6 1.6 1.6 4.1 6.6 22.20330 0.0 0.0 0.0 1.2 2.1 1.7 4.1 7.9 22.00400 0.0 0.0 0.4 1.2 2.4 2.0 4.9 8.6 23.70430 0.0 0.0 0.8 1.2 2.8 1.2 4.9 9.8 24.80500 0.0 0.4 1.6 2.5 3.3 1.6 5.3 12.3 32.80530 0.0 0.4 1.2 1.6 4.9 2.0 6.5 12.1 35.20600 0.0 0.4 1.2 1.2 5.7 1.2 5.7 13.9 34.80630 0.0 0.4 0.4 0.4 5.9 1.3 6.3 16.4 33.20700 0.0 0.0 0.4 0.8 5.3 1.2 5.7 13.5 33.20730 0.0 0.4 0.8 0.8 4.5 0.8 5.7 12.6 30.10800 0.0 0.8 0.8 0.8 5.7 1.2 4.5 10.7 26.20830 0.0 0.4 0.4 0.4 4.1 1.2 3.7 9.0 22.10900 0.0 0.4 0.4 0.4 2.9 1.2 2.0 7.8 19.70930 0.0 0.0 0.4 0.4 2.0 1.2 2.4 6.9 17.51000 0.0 0.0 0.4 0.4 2.1 1.2 1.6 5.8 15.21030 0.0 0.0 0.0 0.0 2.5 1.2 1.7 5.4 14.11100 0.0 0.0 0.0 0.0 1.7 0.4 2.1 4.6 13.31130 0.0 0.0 0.0 0.0 1.6 0.0 1.6 4.1 13.21200 0.0 0.0 0.0 0.0 1.6 0.8 1.2 4.5 11.91230 0.0 0.0 0.0 0.0 0.8 0.4 0.8 3.8 13.01300 0.0 0.0 0.0 0.0 1.6 0.4 1.2 4.1 11.81330 0.0 0.0 0.0 0.0 2.0 0.8 1.2 4.1 11.91400 0.0 0.0 0.0 0.0 1.2 0.0 0.8 3.3 11.51430 0.0 0.0 0.0 0.0 1.2 0.4 0.8 3.3 10.61500 0.0 0.0 0.0 0.0 1.6 0.0 0.4 3.2 10.91530 0.0 0.0 0.0 0.0 1.7 0.0 0.8 3.7 11.21600 0.0 0.0 0.0 0.0 1.2 0.0 1.2 4.1 11.21630 0.0 0.0 0.0 0.0 0.4 0.0 0.8 3.7 13.91700 0.0 0.0 0.0 0.0 0.4 0.0 1.2 4.1 13.11730 0.0 0.0 0.0 0.4 0.4 0.4 1.2 3.7 10.71800 0.0 0.0 0.0 0.4 0.8 0.4 0.8 2.9 10.21830 0.0 0.0 0.0 0.4 1.2 0.8 1.2 2.9 9.51900 0.0 0.0 0.0 0.0 1.2 0.4 1.2 3.3 11.01930 0.0 0.0 0.0 0.0 0.8 0.4 0.8 3.7 13.12000 0.0 0.0 0.0 0.4 0.4 0.4 0.8 3.7 14.02030 0.0 0.0 0.0 0.0 0.8 0.4 0.4 4.5 14.32100 0.0 0.0 0.0 0.8 0.8 0.4 0.4 3.6 16.22130 0.0 0.0 0.4 0.8 0.8 0.8 0.8 2.9 16.42200 0.0 0.0 0.0 0.4 0.8 0.8 0.8 4.1 16.82230 0.0 0.0 0.4 0.8 0.8 0.8 1.3 2.9 17.12300 0.0 0.0 0.0 0.4 0.8 0.8 1.7 4.2 17.12330 0.0 0.0 0.0 0.4 1.2 1.2 2.9 4.5 16.9MEAN 0.0 0.1 0.3 0.5 2.0 0.8 2.5 6.3 18.2





RVR/Hs VIS/Hs



SPECIFIED TIME

TIME (UTC)




Table 79. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 30 – April

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 30 MONTH: IVTOTAL NUMBERS OF OBSERVATION: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.5 9.70030 0.0 0.0 0.0 0.0 0.4 0.4 0.8 3.0 10.20100 0.0 0.0 0.4 0.8 1.7 0.0 1.3 3.8 11.40130 0.0 0.0 0.9 1.3 1.7 0.4 1.7 3.9 12.10200 0.0 0.0 1.3 1.3 2.1 1.3 2.6 6.0 13.20230 0.0 0.0 1.3 2.1 2.6 1.3 3.4 6.0 14.50300 0.0 0.0 0.4 1.7 2.5 2.1 4.2 6.3 16.30330 0.0 0.0 0.9 1.7 3.0 1.7 3.8 7.3 17.50400 0.0 0.0 1.3 2.6 4.3 2.6 4.7 9.4 21.90430 0.0 0.0 2.5 2.5 4.2 3.0 5.1 9.7 24.50500 0.0 0.4 1.3 1.3 3.8 2.6 5.1 10.2 25.50530 0.0 0.8 1.7 2.1 3.3 1.3 4.6 9.2 23.80600 0.0 0.0 0.9 1.3 2.1 0.9 3.9 9.4 20.20630 0.0 0.0 0.4 0.4 0.4 0.4 2.1 8.1 16.60700 0.0 0.0 0.0 0.0 0.8 0.4 1.3 7.2 16.10730 0.0 0.0 0.0 0.0 0.0 0.0 0.4 6.3 14.30800 0.0 0.0 0.0 0.0 0.0 0.0 0.4 5.5 12.30830 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.8 11.40900 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.0 7.80930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.7 7.71000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 6.41030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 6.31100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 6.41130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 6.41200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.7 5.61230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 5.11300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.9 4.71330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 6.81400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.61430 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 5.91500 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.9 6.41530 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.3 4.31600 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.8 5.11630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 5.51700 0.0 0.0 0.0 0.0 0.0 0.0 0.8 0.8 5.11730 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.1 5.91800 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.1 4.71830 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.3 4.71900 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.3 4.21930 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.7 5.52000 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.3 4.72030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.1 4.72100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.7 5.12130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 5.12200 0.0 0.0 0.0 0.4 0.9 0.4 0.4 2.1 6.42230 0.0 0.0 0.0 0.0 0.8 0.4 0.4 2.1 7.62300 0.0 0.0 0.4 0.4 0.4 0.0 0.0 2.5 8.92330 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.6 8.9MEAN 0.0 0.0 0.3 0.4 0.7 0.4 1.1 3.4 9.7





RVR/Hs VIS/Hs



SPECIFIED TIME

TIME (UTC)




Table 80. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 30 – May

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 30 MONTH: VTOTAL NUMBERS OF OBSERVATION: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.4 5.30030 0.0 0.0 0.0 0.4 0.4 0.0 0.8 2.0 5.30100 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.0 5.30130 0.0 0.0 0.0 0.0 0.4 0.0 0.8 2.4 6.10200 0.0 0.0 0.0 0.0 0.8 0.4 1.6 3.3 6.10230 0.0 0.0 0.0 0.0 0.4 0.0 1.2 3.3 8.20300 0.0 0.0 0.0 0.0 0.0 0.0 1.6 4.1 12.20330 0.0 0.0 0.4 0.8 0.8 0.4 2.8 5.3 16.30400 0.0 0.0 0.0 0.0 0.8 0.0 2.0 7.0 18.40430 0.0 0.0 0.0 0.0 0.8 0.4 1.6 6.1 19.00500 0.0 0.0 0.0 0.0 1.6 0.4 2.9 6.1 18.00530 0.0 0.0 0.0 0.0 1.2 0.0 2.4 5.7 14.70600 0.0 0.0 0.0 0.0 0.0 0.0 1.2 5.3 11.40630 0.0 0.0 0.0 0.0 0.0 0.0 1.2 4.1 9.40700 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.3 10.20730 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.8 7.30800 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.0 6.10830 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.2 5.30900 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.2 3.30930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.91000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.11030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.31100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.31130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.61200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.51230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.21300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.41330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.01400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.91430 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.4 2.01500 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.41530 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.01600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.41630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.71700 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.71730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.71800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 6.51830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 6.11900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.91930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 5.32000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 5.32030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.52100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.02130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 4.92200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 4.92230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.6 4.52300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.6 5.32330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.4 5.7MEAN 0.0 0.0 0.0 0.0 0.2 0.0 0.5 1.8 6.2





RVR/Hs VIS/Hs



SPECIFIED TIME

TIME (UTC)




Table 81. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 30 – June

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 30 MONTH: VITOTAL NUMBERS OF OBSERVATION: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.0 0.0 0.0 0.9 0.4 0.4 0.9 3.40030 0.0 0.0 0.0 0.0 0.4 0.0 0.4 1.3 4.60100 0.0 0.0 0.0 0.0 0.4 0.0 0.8 2.1 5.00130 0.0 0.0 0.0 0.0 0.4 0.0 0.4 1.7 5.40200 0.0 0.0 0.0 0.0 0.4 0.0 1.7 3.0 7.60230 0.0 0.0 0.0 0.0 0.8 0.0 1.7 2.9 7.50300 0.0 0.0 0.0 0.4 1.3 0.4 2.1 3.8 13.80330 0.0 0.0 0.0 0.4 1.3 0.8 2.5 4.6 16.70400 0.0 0.0 0.4 0.8 1.7 0.4 4.2 5.8 15.80430 0.0 0.0 0.0 0.4 0.8 0.8 2.9 5.4 14.20500 0.0 0.0 0.0 0.0 0.8 0.8 2.5 5.5 13.40530 0.0 0.0 0.0 0.0 0.8 0.0 2.9 8.3 14.60600 0.0 0.0 0.0 0.0 0.0 0.0 1.7 7.2 12.20630 0.0 0.0 0.0 0.0 0.0 0.0 0.8 6.3 10.80700 0.0 0.0 0.0 0.4 0.4 0.0 1.3 5.9 11.30730 0.0 0.0 0.0 0.0 0.0 0.0 1.3 5.0 10.00800 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.3 8.80830 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.5 6.70900 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.5 5.90930 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.7 5.01000 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.7 4.61030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 3.31100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.7 3.81130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 2.91200 0.0 0.0 0.0 0.0 0.4 0.0 0.0 0.8 2.91230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.21300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.91330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 3.31400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.91430 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.51500 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.81530 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.81600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 5.51630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.21700 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.21730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.81800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.81830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 4.61900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.91930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 3.32000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 2.92030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.72100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.72130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.92200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.52230 0.0 0.0 0.0 0.0 0.4 0.4 0.4 0.8 3.32300 0.0 0.0 0.0 0.4 0.4 0.4 0.4 0.4 3.42330 0.0 0.0 0.0 0.4 0.4 0.4 0.4 0.8 3.4MEAN 0.0 0.0 0.0 0.1 0.3 0.1 0.7 2.1 6.0





RVR/Hs VIS/Hs



SPECIFIED TIME

TIME (UTC)




Table 82. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 30 – July

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 30 MONTH: VIITOTAL NUMBERS OF OBSERVATION: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.0 0.0 0.0 0.4 0.0 0.8 1.6 4.80030 0.0 0.0 0.0 0.0 0.4 0.0 0.8 1.6 5.30100 0.0 0.0 0.0 0.0 0.4 0.0 0.4 2.8 6.50130 0.0 0.0 0.0 0.4 0.8 0.0 0.4 3.2 7.30200 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.8 8.90230 0.0 0.0 0.0 0.4 0.4 0.4 0.8 3.7 10.60300 0.0 0.0 0.0 0.0 0.8 0.0 0.8 3.7 13.50330 0.0 0.4 0.4 0.4 0.4 0.4 1.6 4.9 18.60400 0.0 0.0 0.4 0.8 1.6 0.8 2.4 5.6 17.70430 0.0 0.0 1.2 1.2 1.2 0.8 1.6 3.6 16.90500 0.0 0.0 0.4 0.4 0.4 0.4 1.6 2.8 13.30530 0.0 0.0 0.4 0.4 0.8 0.4 1.6 2.8 11.70600 0.0 0.0 0.0 0.0 0.4 0.0 1.2 2.8 9.30630 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.0 8.90700 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.2 8.60730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 5.30800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 3.30830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 2.80900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.00930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.01000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.81030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 1.61100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.21130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.61200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.21230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.41300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.41330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.21400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.81430 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.81500 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.41530 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.81600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.81630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.21700 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.61730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.41800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.21830 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.4 1.61900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.81930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.22000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.62030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.82100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.72130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.22200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 2.02230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.32300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.82330 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.6 4.5MEAN 0.0 0.0 0.1 0.1 0.2 0.1 0.3 1.3 4.5





RVR/Hs VIS/Hs



SPECIFIED TIME

TIME (UTC)




Table 83. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 30 – August

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 30 MONTH: VIIITOTAL NUMBERS OF OBSERVATION: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.0 0.0 0.0 0.0 0.0 0.8 0.8 5.40030 0.0 0.0 0.0 0.0 0.4 0.4 1.2 1.6 5.70100 0.0 0.0 0.4 0.4 1.6 0.8 2.4 3.6 6.50130 0.0 0.0 0.8 1.2 2.0 1.2 2.8 4.1 6.90200 0.0 0.0 0.0 0.8 2.0 1.6 3.3 3.7 7.70230 0.0 0.0 0.8 1.6 2.0 2.0 3.2 4.4 8.90300 0.0 0.0 0.4 1.6 2.0 1.6 2.4 3.6 10.50330 0.0 0.0 0.4 0.8 2.0 0.8 2.0 4.9 14.60400 0.0 0.4 0.8 0.8 1.6 0.8 2.4 4.9 19.40430 0.0 0.4 1.2 1.6 1.6 1.6 2.0 4.9 19.80500 0.0 0.4 1.2 1.6 2.4 2.0 2.8 5.3 18.70530 0.0 0.4 0.8 1.6 2.8 2.0 4.0 6.5 16.60600 0.0 0.0 1.7 2.1 3.3 1.7 5.0 6.7 13.30630 0.0 0.0 0.4 0.8 2.0 0.8 3.2 5.7 10.50700 0.0 0.0 0.0 0.0 1.6 0.4 2.4 4.9 8.60730 0.0 0.0 0.0 0.0 0.4 0.0 1.6 4.8 10.10800 0.0 0.0 0.0 0.0 0.4 0.0 0.8 2.9 6.50830 0.0 0.0 0.0 0.0 0.4 0.0 0.4 2.0 6.10900 0.0 0.0 0.0 0.0 0.4 0.0 0.4 1.2 5.00930 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.2 3.71000 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.8 5.61030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 5.71100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.91130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.91200 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.51230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.41300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.01330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.41400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.61430 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.21500 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.21530 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.61600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.01630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.01700 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.51730 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.41800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.11830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 2.01900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.61930 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.8 2.02000 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.2 2.42030 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.6 3.62100 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.8 3.72130 0.0 0.0 0.0 0.0 0.0 0.0 0.4 0.8 4.52200 0.0 0.0 0.0 0.0 0.0 0.0 0.8 1.2 3.72230 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.2 4.92300 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.2 5.72330 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.2 4.5MEAN 0.0 0.0 0.2 0.3 0.6 0.4 1.0 2.0 6.0





RVR/Hs VIS/Hs



SPECIFIED TIME

TIME (UTC)




Table 84. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 30 – September

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 30 MONTH: IXTOTAL NUMBERS OF OBSERVATION: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.0 0.4 0.4 0.4 0.0 0.4 2.1 8.80030 0.0 0.0 0.8 1.3 1.3 0.0 0.8 3.8 10.00100 0.0 0.0 0.8 0.8 1.3 0.8 2.5 3.8 13.90130 0.0 0.0 0.8 0.8 1.3 0.8 3.8 5.0 13.90200 0.0 0.0 0.8 0.8 0.8 0.8 3.8 5.5 15.50230 0.0 0.0 0.8 1.7 1.7 1.3 4.2 6.3 16.70300 0.0 0.0 0.8 2.5 3.3 1.7 4.6 6.7 17.20330 0.0 0.0 1.7 2.9 3.8 1.3 4.6 8.4 18.50400 0.0 0.0 1.7 3.4 5.1 2.1 5.1 7.7 22.10430 0.0 0.4 2.1 3.0 4.6 2.5 5.9 11.4 30.00500 0.0 0.4 2.1 2.1 4.6 2.9 5.5 12.6 32.40530 0.0 0.4 0.8 1.3 2.1 1.7 4.6 11.0 30.40600 0.0 0.4 0.8 1.3 1.7 2.1 4.6 9.2 29.80630 0.0 0.0 0.4 1.3 2.1 1.7 3.8 7.9 26.80700 0.0 0.0 0.8 0.8 2.1 1.3 3.4 6.3 20.60730 0.0 0.0 0.4 0.8 2.1 0.4 2.5 7.1 19.70800 0.0 0.0 0.0 0.0 1.3 0.4 2.1 5.9 14.80830 0.0 0.0 0.0 0.0 0.4 0.0 1.3 4.2 11.80900 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.0 11.90930 0.0 0.0 0.0 0.0 0.0 0.0 0.9 3.8 11.51000 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.0 8.41030 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.5 8.91100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.6 8.51130 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.7 5.51200 0.0 0.0 0.0 0.0 0.4 0.0 0.0 2.1 4.61230 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.9 4.71300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.81330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.7 3.81400 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.11430 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.01500 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 3.81530 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.41600 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.21630 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 6.31700 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.7 5.91730 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.7 5.51800 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 3.31830 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 4.21900 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 3.81930 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.92000 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 3.42030 0.0 0.0 0.0 0.4 0.4 0.4 0.4 2.1 4.22100 0.0 0.0 0.4 0.4 0.4 0.4 0.4 1.3 3.82130 0.0 0.0 0.4 0.4 0.4 0.0 0.4 1.7 4.22200 0.0 0.0 0.4 0.4 0.4 0.0 0.4 1.7 5.02230 0.0 0.0 0.0 0.0 0.0 0.4 0.4 1.3 7.12300 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 8.42330 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.7 8.5MEAN 0.0 0.0 0.4 0.6 0.9 0.5 1.4 3.5 10.8





RVR/Hs VIS/Hs



SPECIFIED TIME

TIME (UTC)




Table 85. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 30 – Oktober

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 30 MONTH: XTOTAL NUMBERS OF OBSERVATION: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.4 0.8 2.0 3.7 2.4 4.1 7.8 24.10030 0.0 0.0 1.2 2.8 4.5 3.2 5.7 8.1 25.10100 0.0 0.4 2.4 2.8 3.6 3.2 5.3 8.9 25.50130 0.0 0.4 2.0 3.7 4.9 2.8 6.1 10.2 26.40200 0.0 0.4 1.6 3.3 6.6 3.3 6.1 10.7 27.00230 0.0 0.4 1.6 3.6 6.5 3.2 6.5 10.9 29.60300 0.0 0.0 2.4 4.9 6.1 2.8 6.5 12.2 31.70330 0.0 1.2 3.3 4.9 6.5 4.5 7.3 12.6 32.10400 0.0 1.6 2.8 5.3 7.3 3.6 8.1 15.0 33.60430 0.0 1.6 2.4 5.3 7.8 5.3 9.4 18.0 37.10500 0.0 1.2 3.2 6.1 10.1 6.1 12.6 23.5 42.50530 0.0 1.2 2.4 5.3 9.4 6.9 13.1 24.1 46.50600 0.4 0.8 2.8 4.9 11.7 6.5 14.6 24.3 49.00630 0.0 0.4 2.0 4.5 9.7 6.5 13.8 23.1 48.60700 0.0 0.4 0.8 2.4 6.1 4.5 11.8 21.2 43.30730 0.0 0.4 0.4 0.8 4.1 2.4 8.9 17.1 38.60800 0.0 0.0 0.4 0.4 4.1 1.6 6.9 15.5 36.70830 0.0 0.0 0.0 0.4 2.8 0.8 5.7 12.1 33.20900 0.0 0.0 0.0 0.4 2.0 0.8 5.6 12.1 30.20930 0.0 0.0 0.0 0.0 1.6 0.8 5.7 9.8 27.31000 0.0 0.0 0.0 0.0 2.4 0.0 4.1 7.3 22.41030 0.0 0.0 0.0 0.0 0.4 0.0 3.3 6.6 21.41100 0.0 0.0 0.0 0.0 0.8 0.0 2.9 6.5 22.01130 0.0 0.0 0.0 0.0 0.0 0.0 2.0 6.5 21.01200 0.0 0.0 0.0 0.0 0.0 0.0 1.2 6.5 18.11230 0.0 0.0 0.0 0.0 0.0 0.0 1.2 6.6 17.61300 0.0 0.0 0.0 0.0 0.0 0.0 1.2 6.9 15.41330 0.0 0.0 0.0 0.0 0.4 0.0 2.0 7.3 15.51400 0.0 0.0 0.0 0.0 0.4 0.0 2.0 5.3 15.41430 0.0 0.0 0.0 0.0 0.4 0.0 2.0 4.9 15.81500 0.0 0.0 0.0 0.0 0.4 0.0 2.0 4.8 15.31530 0.0 0.0 0.0 0.0 0.0 0.0 2.4 5.7 16.31600 0.0 0.0 0.0 0.0 0.0 0.0 1.6 4.0 19.41630 0.0 0.0 0.0 0.0 0.8 0.0 1.6 3.3 17.11700 0.0 0.0 0.0 0.0 0.8 0.0 2.0 3.3 18.01730 0.0 0.0 0.0 0.0 0.8 0.0 2.0 4.5 17.61800 0.0 0.0 0.0 0.4 0.8 0.4 2.5 5.3 18.41830 0.0 0.0 0.0 0.4 0.8 0.4 2.0 3.3 19.91900 0.0 0.0 0.0 0.4 1.2 0.4 1.6 4.1 20.71930 0.0 0.0 0.0 0.8 0.8 0.8 2.0 2.9 20.42000 0.0 0.0 0.4 0.8 1.2 1.2 2.0 3.7 20.72030 0.0 0.0 0.0 0.4 1.2 0.8 2.0 4.5 22.02100 0.0 0.0 0.4 0.8 2.0 0.8 2.4 4.0 21.92130 0.0 0.0 0.8 1.2 2.4 1.2 2.4 4.0 21.52200 0.0 0.0 0.8 0.8 2.4 1.2 3.3 4.5 20.32230 0.0 0.4 1.6 2.0 2.8 1.6 3.3 4.9 22.02300 0.0 0.4 1.2 2.1 2.9 1.6 2.9 7.0 22.22330 0.0 0.4 1.2 2.0 3.3 1.6 3.7 7.8 23.3MEAN 0.0 0.3 0.8 1.6 3.1 1.7 4.7 9.2 25.6





RVR/Hs VIS/Hs



SPECIFIED TIME

TIME (UTC)




Table 86. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 30 – November

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 30 MONTH: XITOTAL NUMBERS OF OBSERVATION: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 1.7 4.2 8.4 13.0 7.9 13.0 20.9 37.20030 0.0 0.8 4.6 8.9 12.7 9.3 14.8 23.2 36.30100 0.0 0.8 5.0 8.8 13.8 10.0 14.6 24.3 37.70130 0.0 1.3 5.9 12.6 16.0 13.0 16.4 26.1 37.40200 0.0 1.3 6.7 11.8 17.6 13.0 16.4 26.5 38.70230 0.0 1.7 7.6 11.3 18.1 13.4 18.1 26.5 37.80300 0.0 1.7 6.3 12.2 19.3 13.4 18.9 27.7 40.30330 0.0 0.8 5.9 10.9 18.8 13.4 19.7 29.3 40.20400 0.0 2.1 6.8 12.7 19.8 13.9 20.3 30.0 40.90430 0.0 0.8 6.3 12.9 19.6 13.3 20.0 30.8 40.40500 0.0 0.8 5.4 10.4 18.8 14.2 20.4 29.6 41.70530 0.0 2.9 8.8 13.9 20.2 16.4 23.9 31.9 45.00600 0.0 4.6 9.2 13.8 21.8 16.7 25.9 36.4 49.40630 0.0 3.8 9.2 16.3 22.2 15.9 26.4 36.4 50.20700 0.0 4.2 8.5 12.3 20.3 14.8 23.7 34.7 48.70730 0.0 3.8 7.1 8.8 17.9 11.7 19.6 32.1 47.50800 0.0 3.4 5.9 7.6 14.3 9.7 16.8 27.3 45.40830 0.0 1.7 4.6 5.9 13.0 8.4 13.8 24.3 44.80900 0.0 0.8 2.9 5.0 11.8 7.6 13.4 22.3 41.60930 0.0 0.8 2.5 3.3 8.8 5.8 10.4 20.8 40.81000 0.0 0.8 2.1 2.9 8.0 5.5 9.2 18.1 37.81030 0.0 0.8 2.5 2.9 6.7 3.8 7.6 15.1 34.91100 0.0 0.8 2.1 3.3 5.0 3.3 6.3 13.0 33.51130 0.0 0.4 1.3 2.1 5.1 3.4 5.9 12.2 31.61200 0.0 0.0 0.4 1.7 4.6 3.4 5.9 11.4 27.81230 0.0 0.4 0.8 1.7 4.6 2.5 6.3 11.3 28.51300 0.0 0.4 0.8 1.7 4.2 3.0 6.8 12.2 28.31330 0.0 0.4 0.8 1.7 4.2 2.9 6.3 13.0 27.31400 0.0 0.8 1.3 2.5 5.0 3.4 6.3 13.4 27.71430 0.0 0.8 1.3 2.1 5.5 3.0 6.8 13.1 30.51500 0.0 1.3 1.7 2.5 4.2 3.3 7.1 15.1 34.31530 0.0 1.3 1.7 3.0 4.6 4.2 5.9 13.5 37.11600 0.0 0.8 1.7 2.1 4.2 3.8 6.4 10.2 32.61630 0.0 0.8 2.5 3.4 5.5 3.8 6.8 11.9 32.61700 0.0 0.8 2.5 3.8 4.7 3.8 5.5 11.0 31.81730 0.0 1.3 2.5 3.0 5.5 3.4 6.3 13.9 32.91800 0.0 0.4 2.1 3.3 6.3 3.3 6.7 13.8 34.31830 0.0 0.8 2.5 3.8 6.3 4.6 8.0 16.0 34.91900 0.0 0.8 3.4 4.6 8.4 5.5 8.9 16.9 36.31930 0.0 0.4 3.4 4.6 8.4 5.5 8.4 16.8 35.32000 0.0 0.8 2.5 5.5 10.5 5.5 9.2 15.5 34.92030 0.0 0.8 3.3 5.0 8.8 5.9 9.6 18.0 35.62100 0.0 0.8 3.3 5.0 10.0 5.9 10.0 17.6 36.42130 0.0 1.3 2.9 5.9 9.7 7.6 10.5 18.9 38.22200 0.0 1.3 3.3 7.5 10.5 6.7 10.0 18.8 37.22230 0.0 0.4 3.3 6.7 10.9 7.5 10.9 19.7 37.72300 0.0 0.4 3.4 6.8 11.9 7.7 11.5 20.9 38.32330 0.0 0.8 3.8 8.4 12.6 7.5 12.1 20.9 38.9MEAN 0.0 1.3 3.9 6.6 11.1 7.7 12.2 20.5 37.3





RVR/Hs VIS/Hs



SPECIFIED TIME

TIME (UTC)




Table 87. Frequency of the occurrence of runway visual range/visibility and/or height of the base of the lowest cloud layer of BKN or OVC extent below specified values at specified times for TDZ 30 – December

(ICAO Model A)

MODEL AAERODROME: LYBE RWY (TDZ): 30 MONTH: XIITOTAL NUMBERS OF OBSERVATION: 138528LATITUDE: 44° 49' 10'' N LONGITUDE: 20° 18' 25'' E

< 50 < 200 < 350 < 550 < 1 500 < 800 < 1 500 < 3 000 < 8 000/ / <100 <200 <300 <200 <500 <1 000 <2 000

0000 0.0 0.8 3.3 6.6 13.6 9.5 19.8 32.6 55.80030 0.0 0.8 4.1 6.2 13.6 9.5 19.3 31.3 55.10100 0.0 0.4 3.7 5.4 12.4 8.7 18.3 30.7 53.50130 0.0 0.4 3.3 5.0 10.8 8.7 18.3 28.6 51.50200 0.0 0.8 3.3 7.0 12.3 8.6 18.9 30.3 52.90230 0.0 0.0 4.5 7.0 11.5 9.4 19.7 31.1 54.50300 0.0 0.4 3.3 7.0 11.5 8.6 18.0 32.0 55.70330 0.0 0.8 4.0 6.9 11.7 8.5 18.5 31.5 54.80400 0.0 0.4 4.9 6.9 13.8 8.1 22.3 30.4 55.10430 0.0 0.4 3.6 6.5 13.7 10.1 21.0 31.0 55.60500 0.0 0.4 4.0 7.3 13.7 9.7 21.0 31.0 53.20530 0.0 0.4 4.5 7.7 12.1 10.5 21.5 32.0 51.40600 0.0 0.0 3.7 7.7 13.8 9.3 21.1 34.1 55.30630 0.0 0.4 4.9 7.7 14.6 9.7 25.5 40.1 60.30700 0.0 2.0 6.1 7.3 15.0 9.3 22.4 40.7 59.80730 0.0 2.0 5.2 6.5 16.1 8.5 23.0 42.3 60.10800 0.0 3.2 4.5 6.5 17.4 10.1 23.5 40.1 60.30830 0.0 2.4 4.1 5.7 17.5 11.0 21.1 37.4 61.00900 0.0 2.0 3.3 4.5 13.8 9.3 19.5 34.6 57.70930 0.0 0.8 2.8 4.0 13.3 8.5 17.7 35.9 56.51000 0.0 0.8 2.4 3.3 12.7 7.8 17.6 31.4 54.31030 0.0 0.8 2.0 3.3 11.8 7.7 15.4 31.3 51.21100 0.0 0.8 2.0 2.8 10.6 6.9 14.6 30.1 49.61130 0.0 0.4 2.0 3.2 9.7 6.9 11.7 27.9 49.01200 0.0 0.8 0.8 3.3 10.2 6.1 11.8 25.2 48.01230 0.0 0.8 0.8 2.9 9.4 5.7 12.7 25.7 46.91300 0.0 0.4 0.8 1.6 7.3 4.0 13.0 25.9 47.81330 0.0 0.8 0.8 1.6 7.0 3.3 11.5 26.2 47.11400 0.0 0.4 1.6 2.0 6.9 3.3 10.6 25.2 46.71430 0.0 0.8 1.6 2.4 6.1 4.5 10.6 24.9 48.21500 0.0 0.8 0.8 2.4 6.5 4.0 11.7 25.9 51.81530 0.0 0.8 1.2 2.8 5.3 4.1 11.0 24.0 52.41600 0.0 1.2 1.2 1.6 4.9 2.8 10.2 22.4 48.41630 0.0 1.2 1.2 2.0 6.9 4.1 10.2 22.4 49.41700 0.0 1.2 1.2 2.0 5.3 3.7 8.6 20.0 51.01730 0.0 0.8 1.2 2.9 7.0 4.5 8.7 19.4 50.81800 0.0 0.8 1.6 3.3 7.4 4.5 10.2 20.9 51.61830 0.0 0.8 1.6 3.6 7.3 4.0 10.9 20.6 53.01900 0.0 1.2 2.5 4.5 8.2 5.7 11.9 20.9 50.01930 0.0 1.2 2.8 5.7 8.5 6.1 10.6 20.7 50.82000 0.0 1.6 3.3 5.3 9.8 7.0 12.7 19.7 52.52030 0.0 2.5 3.7 6.6 10.3 7.8 14.0 21.4 53.92100 0.0 1.6 3.7 6.9 9.3 7.7 13.4 21.5 54.52130 0.0 2.0 3.3 5.3 11.1 7.8 13.9 24.6 56.62200 0.0 0.8 3.3 6.1 12.2 7.8 15.1 29.4 55.92230 0.0 0.8 3.3 6.5 13.0 9.3 16.7 28.0 56.52300 0.0 1.2 3.7 6.6 13.5 9.4 18.0 30.7 54.52330 0.0 0.8 3.7 6.5 12.6 10.6 17.5 30.9 55.3MEAN 0.0 1.0 2.9 4.9 10.9 7.4 15.9 28.7 53.3





RVR/Hs VIS/Hs



SPECIFIED TIME

TIME (UTC)




2.5 Wind

Throughout the entire year aerodrome “Nikola Tesla” Belgrade lies in the zone of the two prevailing winds: northwesterly and southeasterly, so caled, kosava wind. Circulations from the western quadrant are frequent, but predominantly with low speeds, which is indicated on seasonal wind roses. An exception to this are stronger incursions from the Atlantic causing stronger winds. Circulation from the southeasterly direction (the kosava wind) is happening when air mass is crossing over the Homolje and other mountains of eastern Serbia and spreading over the Podunavlje and Pomoravlje. In cases when a cyclone develops in the western Mediterranean or a developed cyclone approaches across western Europe, kosava has a more southerly direction, takes on foehn characteristics and is called warm kosava. On the other hand, when the center of an anticyclone is situated above the eastern part of Europe, kosava has a more easterly direction, takes on bora characteristics and is known as cold kosava, mostly occurring in the winter period. In this particular case, kosava gusts may reach gale force and develop speed of above 40 knots. Relative frequency (%) of the wind direction for the given speed intervals is depicted with wind rose in 36 directions per months, seasons and year (Figures 5 – 13). Throughout the year, wind with the speed of up to 10 knots emanates most often from the northeasterly, southeasterly, southwesterly and westerly direction. The strongest winds blow most often from the southeasterly direction, from November to February. The lowest percentage of calms is recorded in spring (March, April, May) – 0.9%, whereas in autumn (September, October, November) the relative frequency of calm – 1.5% is the highest. Wind speed of above 26 knots occurs from November to January, in March and April, with small relative frequency. Wind is also represented with the wind rose (Figures 14, 15 and 16) depicting relative frequency of the wind speed categorized per directions relative to the direction of runway. Wind depicted in such way makes it easier to determine whether runway lies in the basin of the strongest winds or not, as well as what characteristics of crosswinds are. Runway at the Belgrade aerodrome lies in the basin of strong winds, whereas crosswinds are much weaker. It can be concluded that wind normally does not cause disruptions of the air operations throughout the year. Tables 88 – 104 provide data on the relative frequency of the occurrence of wind direction per months, seasons and for the year corresponding to the graphical images on Figures 5 to 13. Tables 105 – 110 provide data on relative frequency for the months with occurrence of the close wind directions (from given sectors of 30 degrees) for certain categories of wind speed.




Data on 10-minute average wind speed and direction from METAR reports were used in all specified presentations of the wind. Data on wind gusts were not taken into account. Tables display wind speed in the interval of 5 knots, and up to 40 knots. 10-minute average wind speed above 40 knots is not registered in the observed period.




Figure 5. Wind polygon – January, February

0.0 %

0.5 %

1.0 %

1.5 %

2.0 %

2.5 %

3.0 %

36010

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160170

180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340350

January

Wind speed (kt)

1-5

6-10

11-15

16-25

26-40

Calm: 1.1 %Variable: 7.8 %

0.0 %

0.5 %

1.0 %

1.5 %

2.0 %

2.5 %

3.0 %

36010

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160170

180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340350

February

Wind speed (kt)

1-5

6-10

11-15

16-25

26-40





Figure 6. Wind polygon – March, April

0.0 %

0.5 %

1.0 %

1.5 %

2.0 %

2.5 %

3.0 %

36010

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160170

180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340350

March

Wind speed (kt)

1-5

6-10

11-15

16-25

26-40


0.0 %

0.5 %

1.0 %

1.5 %

2.0 %

2.5 %

3.0 %

36010

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160170

180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340350

April

Wind speed (kt)

1-5

6-10

11-15

16-25

26-40





Figure 7. Wind polygon – May, June

0.0 %

0.5 %

1.0 %

1.5 %

2.0 %

2.5 %

3.0 %

36010

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160170

180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340350

May

Wind speed (kt)

1-5

6-10

11-15

16-25

26-40

Calm: 1.1 %Variable: 9.4%

0.0 %

0.5 %

1.0 %

1.5 %

2.0 %

2.5 %

3.0 %

36010

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160170

180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340350

June

Wind speed (kt)

1-5

6-10

11-15

16-25

26-40





Figure 8. Wind polygon – July, August

0.0 %

0.5 %

1.0 %

1.5 %

2.0 %

2.5 %

3.0 %

36010

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160170

180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340350

July

Wind speed (kt)

1-5

6-10

11-15

16-25

26-40


0.0 %

0.5 %

1.0 %

1.5 %

2.0 %

2.5 %

3.0 %

36010

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160170

180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340350

August

Wind speed (kt)

1-5

6-10

11-15

16-25

26-40





Figure 9. Wind polygon – September, October

0.0 %

0.5 %

1.0 %

1.5 %

2.0 %

2.5 %

3.0 %

36010

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160170

180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340350

September

Wind speed (kt)

1-5

6-10

11-15

16-25

26-40


0.0 %

0.5 %

1.0 %

1.5 %

2.0 %

2.5 %

3.0 %

36010

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160170

180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340350

October

Wind speed (kt)

1-5

6-10

11-15

16-25

26-40





Figure 10. Wind polygon – November, December

0.0 %

0.5 %

1.0 %

1.5 %

2.0 %

2.5 %

3.0 %

36010

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160170

180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340350

November

Wind speed (kt)

1-5

6-10

11-15

16-25

26-40


0.0 %

0.5 %

1.0 %

1.5 %

2.0 %

2.5 %

3.0 %

36010

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160170

180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340350

December

Wind speed (kt)

1-5

6-10

11-15

16-25

26-40





Figure 11. Wind polygon per season – Spring, Summer

0.0 %

0.5 %

1.0 %

1.5 %

2.0 %

2.5 %

3.0 %

36010

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160170

180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340350

Spring (Mar/Apr/May)

Wind speed (kt)

1-5

6-10

11-15

16-25

26-40


0.0 %

0.5 %

1.0 %

1.5 %

2.0 %

2.5 %

3.0 %

36010

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160170

180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340350

Summer (Jun/Jul/Aug)

Wind speed (kt)

1-5

6-10

11-15

16-25

26-40





Figure 12. Wind polygon per season – Autumn, Winter

0.0 %

0.5 %

1.0 %

1.5 %

2.0 %

2.5 %

3.0 %

36010

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160170

180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340350

Autumn (Sep/Oct/Nov)

Wind speed (kt)

1-5

6-10

11-15

16-25

26-40


0.0 %

0.5 %

1.0 %

1.5 %

2.0 %

2.5 %

3.0 %

36010

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160170

180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340350

Winter (Dec/Jan/Feb)

Wind speed (kt)

1-5

6-10

11-15

16-25

26-40





Figure 13. Wind polygon – yearly

0.0 %

0.5 %

1.0 %

1.5 %

2.0 %

2.5 %

3.0 %

36010

20

30

40

50

60

70

80

90

100

110

120

130

140

150

160170

180190

200

210

220

230

240

250

260

270

280

290

300

310

320

330

340350

Year (Jan - Dec)

Wind speed (kt)

1-5

6-10

11-15

16-25

26-40





Table 88. Frequency of occurrence of wind directions within specified speed ranges – January

Speed(kt)/

Direction (º)1-5 6-10 11-15 16-25 26-40

10 1.0 0.3 0.0 0.0 0.0

20 0.9 0.2 0.0 0.0 0.0

30 1.0 0.4 0.0 0.0 0.0

40 1.6 0.4 0.0 0.0 0.0

50 1.9 0.9 0.0 0.0 0.0

60 1.7 0.3 0.0 0.0 0.0

70 1.4 0.3 0.0 0.0 0.0

80 1.2 0.3 0.0 0.0 0.0

90 1.0 0.7 0.1 0.0 0.0

100 1.6 0.8 0.5 0.0 0.0

110 1.3 1.1 0.9 0.0 0.0

120 1.4 1.2 0.6 0.2 0.0

130 1.2 1.5 0.9 0.8 0.0

140 1.2 1.5 1.1 0.7 0.0

150 1.0 0.7 0.5 0.2 0.0

160 1.3 0.6 0.1 0.0 0.0

170 1.2 0.8 0.0 0.0 0.0

180 1.4 1.3 0.0 0.0 0.0

190 1.3 1.2 0.0 0.0 0.0

200 1.4 0.7 0.0 0.0 0.0

210 1.2 0.6 0.0 0.0 0.0

220 1.5 0.5 0.0 0.0 0.0

230 1.8 0.4 0.0 0.0 0.0

240 1.9 0.6 0.0 0.0 0.0

250 1.6 1.1 0.1 0.0 0.0

260 1.7 1.9 0.3 0.0 0.0

270 1.3 2.2 0.8 0.1 0.0

280 1.2 2.3 1.1 0.1 0.0

290 1.1 1.4 0.7 0.2 0.0

300 1.1 1.1 0.5 0.1 0.0

310 0.9 0.9 0.4 0.1 0.0

320 0.9 0.7 0.3 0.1 0.0

330 0.7 0.5 0.3 0.1 0.0

340 1.0 0.8 0.3 0.3 0.0

350 1.1 0.5 0.3 0.2 0.0

360 1.2 0.4 0.1 0.1 0.0

REMARKSCases when a certain phenomenon is not occurred and





Table 89. Frequency of occurrence of wind directions within specified speed ranges – February

Speed(kt)/

Direction (º)1-5 6-10 11-15 16-25 26-40

10 0.9 0.3 0.1 0.1 0.0

20 0.9 0.2 0.0 0.1 0.0

30 1.0 0.5 0.0 0.0 0.0

40 1.3 0.6 0.0 0.0 0.0

50 1.1 0.4 0.0 0.0 0.0

60 1.2 0.4 0.0 0.0 0.0

70 0.8 0.3 0.0 0.0 0.0

80 1.0 0.5 0.1 0.0 0.0

90 1.1 0.8 0.2 0.0 0.0

100 1.2 1.1 0.4 0.2 0.0

110 1.0 1.3 0.8 0.4 0.0

120 1.0 1.1 0.9 0.7 0.0

130 0.8 1.2 1.2 1.5 0.0

140 0.8 1.5 0.9 0.8 0.0

150 1.0 1.6 0.5 0.2 0.0

160 0.8 1.2 0.1 0.0 0.0

170 0.9 1.5 0.2 0.0 0.0

180 1.0 1.5 0.1 0.0 0.0

190 1.1 1.4 0.0 0.0 0.0

200 1.1 0.7 0.0 0.0 0.0

210 1.2 0.5 0.0 0.0 0.0

220 1.5 0.5 0.0 0.0 0.0

230 1.7 0.5 0.0 0.0 0.0

240 1.5 0.6 0.0 0.0 0.0

250 1.4 0.6 0.0 0.0 0.0

260 1.5 1.5 0.3 0.0 0.0

270 1.1 2.1 0.7 0.2 0.0

280 1.3 2.4 1.2 0.4 0.0

290 1.2 1.6 0.6 0.2 0.0

300 1.5 1.2 0.5 0.2 0.0

310 1.4 1.2 0.8 0.1 0.0

320 1.1 0.8 0.6 0.2 0.0

330 1.1 1.1 0.4 0.0 0.0

340 1.2 1.3 0.6 0.1 0.0

350 1.0 1.0 0.3 0.1 0.0

360 1.2 0.6 0.1 0.0 0.0






Table 90. Frequency of occurrence of wind directions within specified speed ranges – March

Speed(kt)/

Direction (º)1-5 6-10 11-15 16-25 26-40

10 0.8 0.6 0.2 0.1 0.0

20 0.7 0.5 0.1 0.0 0.0

30 0.9 0.6 0.0 0.0 0.0

40 1.1 0.5 0.0 0.0 0.0

50 1.3 0.6 0.0 0.0 0.0

60 1.2 0.5 0.0 0.0 0.0

70 1.0 0.4 0.1 0.0 0.0

80 1.1 0.5 0.2 0.0 0.0

90 1.1 0.7 0.2 0.0 0.0

100 1.1 1.0 0.9 0.3 0.0

110 1.0 1.0 1.1 0.6 0.0

120 0.9 0.9 0.9 0.7 0.1

130 0.7 0.9 0.7 0.8 0.0

140 1.0 1.2 0.7 0.5 0.0

150 0.9 1.1 0.3 0.1 0.0

160 1.1 1.3 0.2 0.0 0.0

170 1.3 1.9 0.3 0.1 0.0

180 1.1 1.6 0.2 0.0 0.0

190 1.1 1.7 0.2 0.0 0.0

200 1.0 1.0 0.1 0.0 0.0

210 1.0 0.8 0.1 0.0 0.0

220 1.3 0.9 0.1 0.0 0.0

230 1.1 0.7 0.1 0.0 0.0

240 1.3 1.1 0.1 0.1 0.0

250 1.0 1.2 0.1 0.0 0.0

260 1.1 1.9 0.3 0.0 0.0

270 0.8 2.3 1.0 0.1 0.0

280 0.9 2.1 1.2 0.2 0.0

290 0.8 1.7 1.1 0.3 0.0

300 0.8 1.2 0.8 0.3 0.0

310 0.8 1.3 0.7 0.2 0.0

320 0.9 1.4 0.7 0.2 0.0

330 0.7 1.0 0.4 0.2 0.0

340 1.0 1.1 0.4 0.1 0.0

350 0.7 0.9 0.3 0.1 0.0

360 0.7 0.8 0.3 0.1 0.0






Table 91. Frequency of occurrence of wind directions within specified speed ranges – April

Speed(kt)/

Direction (º)1-5 6-10 11-15 16-25 26-40

10 0.8 0.6 0.3 0.0 0.0

20 0.9 0.5 0.0 0.0 0.0

30 0.9 0.3 0.0 0.0 0.0

40 0.9 0.4 0.0 0.0 0.0

50 1.0 0.3 0.0 0.0 0.0

60 1.1 0.3 0.0 0.0 0.0

70 0.9 0.4 0.0 0.0 0.0

80 1.2 0.7 0.0 0.0 0.0

90 1.1 0.8 0.1 0.0 0.0

100 1.1 1.0 0.3 0.1 0.0

110 1.1 1.5 0.8 0.4 0.0

120 1.1 1.7 1.4 0.9 0.0

130 1.1 2.1 1.3 0.9 0.0

140 1.4 2.1 0.8 0.5 0.0

150 1.4 1.4 0.2 0.1 0.0

160 1.4 1.5 0.1 0.0 0.0

170 1.3 1.1 0.2 0.0 0.0

180 1.5 1.1 0.1 0.0 0.0

190 1.4 1.3 0.2 0.0 0.0

200 1.2 0.8 0.1 0.0 0.0

210 1.3 0.7 0.1 0.0 0.0

220 1.5 0.7 0.1 0.0 0.0

230 1.4 0.5 0.1 0.0 0.0

240 1.4 0.8 0.1 0.0 0.0

250 1.4 0.7 0.0 0.0 0.0

260 1.1 1.4 0.4 0.1 0.0

270 1.1 2.0 0.8 0.2 0.0

280 1.1 1.5 0.9 0.3 0.0

290 0.9 1.2 0.4 0.2 0.0

300 1.0 1.1 0.4 0.2 0.0

310 0.7 1.0 0.5 0.2 0.0

320 0.7 0.8 0.5 0.2 0.1

330 0.6 0.8 0.4 0.1 0.0

340 0.8 1.0 0.5 0.1 0.0

350 0.8 0.8 0.3 0.1 0.0

360 0.9 0.6 0.3 0.0 0.0






Table 92. Frequency of occurrence of wind directions within specified speed ranges – May

Speed(kt)/

Direction (º)1-5 6-10 11-15 16-25 26-40

10 0.9 0.6 0.0 0.0 0.0

20 1.0 0.5 0.0 0.0 0.0

30 1.0 0.5 0.0 0.0 0.0

40 0.9 0.5 0.0 0.0 0.0

50 1.1 0.3 0.0 0.0 0.0

60 1.0 0.3 0.0 0.0 0.0

70 1.0 0.3 0.0 0.0 0.0

80 1.0 0.4 0.0 0.0 0.0

90 1.0 0.4 0.0 0.0 0.0

100 1.0 0.7 0.1 0.0 0.0

110 1.1 0.9 0.4 0.0 0.0

120 1.1 1.1 0.5 0.1 0.0

130 1.2 1.4 0.5 0.1 0.0

140 1.4 1.5 0.6 0.2 0.0

150 1.3 1.1 0.1 0.1 0.0

160 1.6 0.7 0.1 0.0 0.0

170 1.6 0.6 0.0 0.0 0.0

180 1.8 0.4 0.0 0.0 0.0

190 1.7 0.6 0.0 0.0 0.0

200 1.6 0.5 0.0 0.0 0.0

210 1.5 0.5 0.0 0.0 0.0

220 2.0 0.5 0.0 0.0 0.0

230 2.1 0.6 0.0 0.0 0.0

240 2.3 0.9 0.0 0.0 0.0

250 2.0 0.9 0.1 0.0 0.0

260 1.9 1.8 0.2 0.0 0.0

270 1.2 2.1 0.4 0.1 0.0

280 1.6 2.2 0.7 0.2 0.0

290 1.1 2.0 0.7 0.3 0.0

300 1.3 1.6 0.4 0.1 0.0

310 1.1 1.6 0.5 0.1 0.0

320 1.0 1.4 0.6 0.1 0.0

330 1.0 1.1 0.6 0.0 0.0

340 0.9 1.1 0.3 0.1 0.0

350 0.9 0.7 0.1 0.0 0.0

360 1.0 0.7 0.1 0.0 0.0






Table 93. Frequency of occurrence of wind directions within specified speed ranges – June

Speed(kt)/

Direction (º)1-5 6-10 11-15 16-25 26-40

10 0.7 0.7 0.1 0.0 0.0

20 1.2 0.6 0.0 0.0 0.0

30 0.9 0.4 0.0 0.0 0.0

40 1.2 0.4 0.0 0.0 0.0

50 1.1 0.3 0.1 0.0 0.0

60 1.2 0.3 0.0 0.0 0.0

70 1.0 0.5 0.0 0.0 0.0

80 1.3 0.6 0.1 0.0 0.0

90 1.0 0.6 0.1 0.0 0.0

100 1.1 0.6 0.1 0.0 0.0

110 1.1 0.8 0.1 0.0 0.0

120 1.0 0.9 0.4 0.0 0.0

130 1.2 1.0 0.3 0.1 0.0

140 1.7 1.5 0.4 0.1 0.0

150 1.6 1.2 0.2 0.0 0.0

160 1.6 0.7 0.1 0.0 0.0

170 1.6 0.6 0.1 0.0 0.0

180 1.7 0.8 0.0 0.0 0.0

190 1.5 0.7 0.0 0.0 0.0

200 1.5 0.7 0.0 0.0 0.0

210 1.7 0.5 0.0 0.0 0.0

220 1.6 0.6 0.1 0.0 0.0

230 1.7 0.6 0.1 0.0 0.0

240 2.3 0.6 0.3 0.0 0.0

250 1.7 0.9 0.2 0.1 0.0

260 1.6 1.4 0.4 0.2 0.0

270 1.3 1.8 0.4 0.2 0.0

280 1.4 2.2 0.5 0.0 0.0

290 1.4 2.2 0.4 0.1 0.0

300 1.3 1.8 0.4 0.0 0.0

310 1.2 1.2 0.4 0.0 0.0

320 1.1 1.6 0.4 0.1 0.0

330 0.9 1.1 0.4 0.1 0.0

340 1.0 1.2 0.4 0.0 0.0

350 0.8 1.0 0.1 0.0 0.0

360 1.0 0.8 0.2 0.0 0.0






Table 94. Frequency of occurrence of wind directions within specified speed ranges – July

Speed(kt)/

Direction (º)1-5 6-10 11-15 16-25 26-40

10 1.2 0.9 0.1 0.0 0.0

20 1.3 0.8 0.0 0.0 0.0

30 1.2 0.5 0.0 0.0 0.0

40 1.4 0.4 0.0 0.0 0.0

50 1.4 0.4 0.0 0.0 0.0

60 1.3 0.4 0.0 0.0 0.0

70 1.3 0.6 0.0 0.0 0.0

80 1.2 0.7 0.0 0.0 0.0

90 1.2 0.6 0.1 0.0 0.0

100 1.0 0.7 0.2 0.0 0.0

110 1.0 0.8 0.2 0.0 0.0

120 1.0 1.0 0.3 0.0 0.0

130 1.1 1.2 0.3 0.1 0.0

140 1.2 1.2 0.3 0.1 0.0

150 1.4 0.9 0.2 0.0 0.0

160 1.6 0.6 0.0 0.0 0.0

170 1.3 0.4 0.0 0.0 0.0

180 1.5 0.5 0.0 0.0 0.0

190 1.6 0.5 0.0 0.0 0.0

200 1.5 0.5 0.0 0.0 0.0

210 1.2 0.3 0.0 0.0 0.0

220 1.8 0.5 0.0 0.0 0.0

230 1.8 0.4 0.0 0.0 0.0

240 2.0 0.6 0.0 0.0 0.0

250 2.1 0.8 0.0 0.0 0.0

260 1.6 1.3 0.1 0.0 0.0

270 1.5 1.6 0.5 0.0 0.0

280 1.4 2.0 0.7 0.1 0.0

290 1.2 1.7 0.5 0.1 0.0

300 1.4 1.4 0.4 0.1 0.0

310 1.2 1.4 0.3 0.1 0.0

320 1.4 1.8 0.4 0.1 0.0

330 1.1 1.6 0.4 0.1 0.0

340 1.0 1.6 0.4 0.0 0.0

350 0.9 1.1 0.2 0.0 0.0

360 1.1 0.8 0.1 0.0 0.0






Table 95. Frequency of occurrence of wind directions within specified speed ranges – August

Speed(kt)/

Direction (º)1-5 6-10 11-15 16-25 26-40

10 1.4 0.8 0.1 0.0 0.0

20 1.5 0.8 0.0 0.0 0.0

30 1.5 0.5 0.0 0.0 0.0

40 1.7 0.6 0.0 0.0 0.0

50 1.7 0.4 0.0 0.0 0.0

60 1.8 0.4 0.0 0.0 0.0

70 1.4 0.4 0.0 0.0 0.0

80 1.5 0.5 0.0 0.0 0.0

90 1.2 0.3 0.0 0.0 0.0

100 1.3 0.4 0.1 0.0 0.0

110 1.2 0.6 0.1 0.0 0.0

120 1.2 0.9 0.4 0.2 0.0

130 1.1 0.9 0.5 0.3 0.0

140 1.3 1.0 0.3 0.1 0.0

150 1.4 0.9 0.2 0.0 0.0

160 1.5 0.5 0.0 0.0 0.0

170 1.4 0.4 0.0 0.0 0.0

180 1.7 0.3 0.0 0.0 0.0

190 1.5 0.3 0.0 0.0 0.0

200 1.2 0.4 0.0 0.0 0.0

210 1.4 0.4 0.0 0.0 0.0

220 2.1 0.3 0.0 0.0 0.0

230 1.9 0.4 0.0 0.0 0.0

240 2.4 0.6 0.0 0.0 0.0

250 1.9 0.8 0.1 0.0 0.0

260 2.0 1.1 0.2 0.1 0.0

270 1.4 1.4 0.5 0.0 0.0

280 1.3 1.6 0.4 0.0 0.0

290 1.1 1.3 0.3 0.1 0.0

300 1.4 1.5 0.2 0.0 0.0

310 1.1 1.0 0.1 0.1 0.0

320 1.3 1.0 0.1 0.1 0.0

330 1.3 1.0 0.2 0.0 0.0

340 1.3 1.0 0.3 0.0 0.0

350 1.4 0.9 0.1 0.0 0.0

360 1.5 0.8 0.2 0.0 0.0






Table 96. Frequency of occurrence of wind directions within specified speed ranges – September

Speed(kt)/

Direction (º)1-5 6-10 11-15 16-25 26-40

10 1.2 0.6 0.1 0.0 0.0

20 1.3 0.5 0.0 0.0 0.0

30 1.4 0.4 0.0 0.0 0.0

40 1.6 0.4 0.0 0.0 0.0

50 1.7 0.5 0.0 0.0 0.0

60 1.8 0.5 0.0 0.0 0.0

70 1.8 0.7 0.0 0.0 0.0

80 1.7 1.3 0.0 0.0 0.0

90 1.5 0.8 0.1 0.0 0.0

100 1.5 1.9 0.3 0.0 0.0

110 1.3 1.5 0.4 0.1 0.0

120 1.3 1.8 0.8 0.3 0.0

130 1.3 1.3 0.9 0.2 0.0

140 1.4 1.4 0.7 0.3 0.0

150 1.2 0.8 0.1 0.1 0.0

160 1.2 0.5 0.0 0.0 0.0

170 1.2 0.3 0.1 0.0 0.0

180 1.5 0.6 0.1 0.0 0.0

190 1.4 0.6 0.0 0.0 0.0

200 1.3 0.5 0.0 0.0 0.0

210 1.3 0.3 0.0 0.0 0.0

220 1.6 0.3 0.0 0.0 0.0

230 1.8 0.3 0.0 0.0 0.0

240 1.9 0.4 0.1 0.0 0.0

250 1.7 0.7 0.1 0.0 0.0

260 1.7 1.0 0.1 0.0 0.0

270 1.2 1.8 0.3 0.1 0.0

280 1.0 1.9 0.6 0.2 0.0

290 1.1 1.2 0.6 0.1 0.0

300 1.2 1.1 0.4 0.1 0.0

310 1.1 0.8 0.1 0.0 0.0

320 1.1 0.8 0.2 0.0 0.0

330 1.0 0.9 0.1 0.0 0.0

340 1.2 0.7 0.1 0.0 0.0

350 0.9 0.8 0.1 0.0 0.0

360 1.0 0.7 0.1 0.0 0.0






Table 97. Frequency of occurrence of wind directions within specified speed ranges – October

Speed(kt)/

Direction (º)1-5 6-10 11-15 16-25 26-40

10 1.0 0.6 0.0 0.0 0.0

20 1.1 0.5 0.0 0.0 0.0

30 1.4 0.4 0.0 0.0 0.0

40 1.3 0.2 0.0 0.0 0.0

50 1.6 0.4 0.0 0.0 0.0

60 1.7 0.3 0.0 0.0 0.0

70 1.7 0.4 0.0 0.0 0.0

80 1.9 0.6 0.0 0.0 0.0

90 1.6 1.1 0.2 0.0 0.0

100 1.9 2.1 0.5 0.0 0.0

110 1.6 1.7 0.9 0.1 0.0

120 1.5 1.7 1.2 0.3 0.0

130 1.4 1.7 1.4 0.8 0.0

140 1.6 1.6 1.0 0.5 0.0

150 1.2 0.8 0.3 0.1 0.0

160 1.0 0.6 0.1 0.0 0.0

170 1.4 0.5 0.0 0.0 0.0

180 1.2 0.7 0.0 0.0 0.0

190 1.6 0.8 0.0 0.0 0.0

200 1.6 0.4 0.0 0.0 0.0

210 1.4 0.3 0.0 0.0 0.0

220 2.0 0.2 0.0 0.0 0.0

230 1.4 0.4 0.0 0.0 0.0

240 1.6 0.3 0.0 0.0 0.0

250 1.5 0.4 0.0 0.0 0.0

260 1.3 0.8 0.1 0.0 0.0

270 1.3 1.4 0.5 0.0 0.0

280 0.9 1.5 0.7 0.1 0.0

290 0.9 1.0 0.3 0.1 0.0

300 1.0 0.7 0.3 0.1 0.0

310 0.9 0.7 0.2 0.2 0.0

320 0.9 0.7 0.1 0.1 0.0

330 0.8 0.9 0.2 0.0 0.0

340 1.0 0.7 0.2 0.1 0.0

350 0.8 0.6 0.1 0.0 0.0

360 0.8 0.7 0.1 0.0 0.0






Table 98. Frequency of occurrence of wind directions within specified speed ranges – November

Speed(kt)/

Direction (º)1-5 6-10 11-15 16-25 26-40

10 0.7 0.2 0.0 0.0 0.0

20 1.0 0.1 0.0 0.0 0.0

30 1.0 0.1 0.0 0.0 0.0

40 1.5 0.2 0.0 0.0 0.0

50 1.4 0.4 0.0 0.0 0.0

60 1.4 0.4 0.0 0.0 0.0

70 1.3 0.3 0.0 0.0 0.0

80 1.4 0.2 0.1 0.0 0.0

90 1.6 0.9 0.1 0.0 0.0

100 1.8 1.9 0.4 0.0 0.0

110 1.8 1.6 0.6 0.1 0.0

120 1.7 1.8 0.6 0.4 0.0

130 1.5 2.5 1.3 1.8 0.1

140 1.7 2.5 1.9 1.6 0.0

150 1.6 1.2 0.7 0.3 0.0

160 1.4 0.9 0.3 0.1 0.0

170 1.4 0.9 0.2 0.0 0.0

180 1.8 0.7 0.1 0.0 0.0

190 2.0 1.0 0.0 0.0 0.0

200 1.2 0.8 0.0 0.0 0.0

210 1.1 0.4 0.0 0.0 0.0

220 1.4 0.4 0.0 0.0 0.0

230 1.4 0.3 0.0 0.0 0.0

240 1.5 0.7 0.0 0.0 0.0

250 1.3 1.0 0.1 0.0 0.0

260 1.3 1.3 0.2 0.0 0.0

270 1.1 1.4 0.6 0.0 0.0

280 1.1 1.5 0.7 0.1 0.0

290 0.7 1.1 0.5 0.1 0.0

300 1.0 0.7 0.3 0.1 0.0

310 0.8 0.6 0.2 0.1 0.0

320 0.6 0.5 0.1 0.0 0.0

330 0.3 0.3 0.1 0.1 0.0

340 0.4 0.3 0.1 0.1 0.0

350 0.5 0.2 0.0 0.1 0.0

360 0.8 0.2 0.0 0.0 0.0






Table 99. Frequency of occurrence of wind directions within specified speed ranges – December

Speed(kt)/

Direction (º)1-5 6-10 11-15 16-25 26-40

10 1.0 0.2 0.0 0.0 0.0

20 1.2 0.3 0.0 0.0 0.0

30 1.6 0.6 0.0 0.0 0.0

40 1.8 0.7 0.0 0.0 0.0

50 1.5 0.5 0.0 0.0 0.0

60 1.4 0.6 0.0 0.0 0.0

70 1.1 0.3 0.0 0.0 0.0

80 1.0 0.5 0.1 0.0 0.0

90 0.9 0.5 0.1 0.0 0.0

100 1.1 0.7 0.2 0.1 0.0

110 0.9 0.8 0.2 0.2 0.0

120 1.0 0.8 0.5 0.8 0.0

130 0.9 1.2 1.0 0.9 0.0

140 1.2 2.2 1.5 1.5 0.0

150 1.1 1.7 0.6 0.3 0.0

160 1.5 1.6 0.3 0.0 0.0

170 1.0 1.1 0.1 0.0 0.0

180 1.1 1.5 0.1 0.0 0.0

190 1.1 1.2 0.1 0.0 0.0

200 0.9 0.6 0.0 0.0 0.0

210 0.8 0.3 0.0 0.0 0.0

220 1.0 0.2 0.0 0.0 0.0

230 1.2 0.5 0.1 0.0 0.0

240 1.6 0.7 0.0 0.0 0.0

250 1.7 1.0 0.1 0.0 0.0

260 1.6 1.5 0.1 0.0 0.0

270 1.5 2.1 0.5 0.2 0.0

280 1.3 2.4 1.2 0.4 0.0

290 1.1 1.4 0.7 0.1 0.0

300 0.9 0.9 0.4 0.2 0.0

310 0.9 0.7 0.3 0.2 0.0

320 0.8 0.8 0.3 0.1 0.0

330 0.7 0.6 0.2 0.1 0.0

340 1.2 1.0 0.3 0.0 0.0

350 1.0 0.5 0.1 0.1 0.0

360 1.0 0.3 0.1 0.0 0.0






Table 100. Frequency of occurrence of wind directions within specified speed ranges – Spring

Speed(kt)/

Direction (º)1-5 6-10 11-15 16-25 26-40

10 0.8 0.6 0.2 0.0 0.0

20 0.9 0.5 0.1 0.0 0.0

30 0.9 0.5 0.0 0.0 0.0

40 1.0 0.5 0.0 0.0 0.0

50 1.1 0.4 0.0 0.0 0.0

60 1.1 0.4 0.0 0.0 0.0

70 0.9 0.4 0.0 0.0 0.0

80 1.1 0.5 0.1 0.0 0.0

90 1.1 0.6 0.1 0.0 0.0

100 1.1 0.9 0.4 0.2 0.0

110 1.0 1.1 0.7 0.4 0.0

120 1.0 1.3 0.9 0.5 0.0

130 1.0 1.4 0.8 0.6 0.0

140 1.3 1.6 0.7 0.4 0.0

150 1.2 1.2 0.2 0.1 0.0

160 1.4 1.2 0.1 0.0 0.0

170 1.4 1.2 0.1 0.0 0.0

180 1.5 1.0 0.1 0.0 0.0

190 1.4 1.2 0.1 0.0 0.0

200 1.3 0.8 0.1 0.0 0.0

210 1.2 0.7 0.0 0.0 0.0

220 1.6 0.7 0.1 0.0 0.0

230 1.5 0.6 0.0 0.0 0.0

240 1.7 0.9 0.1 0.0 0.0

250 1.5 1.0 0.1 0.0 0.0

260 1.3 1.7 0.3 0.0 0.0

270 1.0 2.1 0.7 0.1 0.0

280 1.2 2.0 0.9 0.3 0.0

290 1.0 1.6 0.8 0.3 0.0

300 1.0 1.3 0.5 0.2 0.0

310 0.9 1.3 0.6 0.1 0.0

320 0.9 1.2 0.6 0.2 0.0

330 0.8 1.0 0.5 0.1 0.0

340 0.9 1.1 0.4 0.1 0.0

350 0.8 0.8 0.2 0.1 0.0

360 0.8 0.7 0.2 0.0 0.0






Table 101. Frequency of occurrence of wind directions within specified speed ranges – Summer

Speed(kt)/

Direction (º)1-5 6-10 11-15 16-25 26-40

10 1.1 0.8 0.1 0.0 0.0

20 1.3 0.8 0.0 0.0 0.0

30 1.2 0.5 0.0 0.0 0.0

40 1.4 0.4 0.0 0.0 0.0

50 1.4 0.4 0.0 0.0 0.0

60 1.4 0.4 0.0 0.0 0.0

70 1.2 0.5 0.0 0.0 0.0

80 1.3 0.6 0.0 0.0 0.0

90 1.1 0.5 0.1 0.0 0.0

100 1.1 0.6 0.1 0.0 0.0

110 1.1 0.7 0.2 0.0 0.0

120 1.1 0.9 0.4 0.1 0.0

130 1.1 1.0 0.4 0.2 0.0

140 1.4 1.2 0.3 0.1 0.0

150 1.4 1.0 0.2 0.0 0.0

160 1.6 0.6 0.1 0.0 0.0

170 1.4 0.5 0.0 0.0 0.0

180 1.6 0.5 0.0 0.0 0.0

190 1.6 0.5 0.0 0.0 0.0

200 1.4 0.5 0.0 0.0 0.0

210 1.4 0.4 0.0 0.0 0.0

220 1.9 0.5 0.0 0.0 0.0

230 1.8 0.5 0.0 0.0 0.0

240 2.2 0.6 0.1 0.0 0.0

250 1.9 0.8 0.1 0.1 0.0

260 1.7 1.2 0.3 0.1 0.0

270 1.4 1.6 0.4 0.1 0.0

280 1.4 2.0 0.5 0.0 0.0

290 1.2 1.7 0.4 0.1 0.0

300 1.4 1.5 0.4 0.1 0.0

310 1.2 1.2 0.3 0.1 0.0

320 1.3 1.5 0.3 0.1 0.0

330 1.1 1.2 0.3 0.0 0.0

340 1.1 1.3 0.3 0.0 0.0

350 1.0 1.0 0.2 0.0 0.0

360 1.2 0.8 0.1 0.0 0.0






Table 102. Frequency of occurrence of wind directions within specified speed ranges – Autumn

Speed(kt)/

Direction (º)1-5 6-10 11-15 16-25 26-40

10 1.0 0.5 0.1 0.0 0.0

20 1.1 0.4 0.0 0.0 0.0

30 1.3 0.3 0.0 0.0 0.0

40 1.4 0.3 0.0 0.0 0.0

50 1.6 0.4 0.0 0.0 0.0

60 1.7 0.4 0.0 0.0 0.0

70 1.6 0.4 0.0 0.0 0.0

80 1.7 0.7 0.0 0.0 0.0

90 1.6 0.9 0.1 0.0 0.0

100 1.7 2.0 0.4 0.0 0.0

110 1.6 1.6 0.7 0.1 0.0

120 1.5 1.8 0.9 0.4 0.0

130 1.4 1.8 1.2 0.9 0.0

140 1.6 1.8 1.2 0.8 0.0

150 1.3 0.9 0.4 0.1 0.0

160 1.2 0.7 0.1 0.0 0.0

170 1.3 0.6 0.1 0.0 0.0

180 1.5 0.7 0.1 0.0 0.0

190 1.7 0.8 0.0 0.0 0.0

200 1.4 0.6 0.0 0.0 0.0

210 1.3 0.3 0.0 0.0 0.0

220 1.7 0.3 0.0 0.0 0.0

230 1.5 0.3 0.0 0.0 0.0

240 1.7 0.5 0.0 0.0 0.0

250 1.5 0.7 0.0 0.0 0.0

260 1.4 1.1 0.1 0.0 0.0

270 1.2 1.5 0.4 0.0 0.0

280 1.0 1.6 0.7 0.1 0.0

290 0.9 1.1 0.5 0.1 0.0

300 1.1 0.8 0.3 0.1 0.0

310 0.9 0.7 0.1 0.1 0.0

320 0.8 0.6 0.2 0.1 0.0

330 0.7 0.7 0.1 0.0 0.0

340 0.9 0.6 0.1 0.1 0.0

350 0.7 0.5 0.1 0.0 0.0

360 0.9 0.5 0.1 0.0 0.0






Table 103. Frequency of occurrence of wind directions within specified speed ranges – Winter

Speed(kt)/

Direction (º)1-5 6-10 11-15 16-25 26-40

10 1.0 0.2 0.0 0.0 0.0

20 1.0 0.2 0.0 0.0 0.0

30 1.2 0.5 0.0 0.0 0.0

40 1.6 0.6 0.0 0.0 0.0

50 1.5 0.6 0.0 0.0 0.0

60 1.4 0.4 0.0 0.0 0.0

70 1.1 0.3 0.0 0.0 0.0

80 1.1 0.5 0.1 0.0 0.0

90 1.0 0.7 0.1 0.0 0.0

100 1.3 0.9 0.3 0.1 0.0

110 1.1 1.0 0.6 0.2 0.0

120 1.1 1.1 0.6 0.6 0.0

130 1.0 1.3 1.0 1.0 0.0

140 1.1 1.8 1.2 1.0 0.0

150 1.1 1.3 0.5 0.2 0.0

160 1.2 1.1 0.2 0.0 0.0

170 1.0 1.1 0.1 0.0 0.0

180 1.2 1.4 0.1 0.0 0.0

190 1.2 1.3 0.0 0.0 0.0

200 1.1 0.7 0.0 0.0 0.0

210 1.1 0.5 0.0 0.0 0.0

220 1.3 0.4 0.0 0.0 0.0

230 1.6 0.4 0.0 0.0 0.0

240 1.7 0.6 0.0 0.0 0.0

250 1.6 0.9 0.1 0.0 0.0

260 1.6 1.6 0.3 0.0 0.0

270 1.3 2.1 0.6 0.2 0.0

280 1.3 2.4 1.2 0.3 0.0

290 1.1 1.4 0.7 0.2 0.0

300 1.2 1.1 0.5 0.2 0.0

310 1.1 0.9 0.5 0.1 0.0

320 0.9 0.8 0.4 0.1 0.0

330 0.8 0.7 0.3 0.1 0.0

340 1.1 1.0 0.4 0.1 0.0

350 1.0 0.7 0.2 0.1 0.0

360 1.1 0.4 0.1 0.0 0.0






Table 104. Frequency of occurrence of wind directions within specified speed ranges – Year

Speed(kt)/

Direction (º)1-5 6-10 11-15 16-25 26-40

10 1.0 0.5 0.1 0.0 0.0

20 1.1 0.5 0.0 0.0 0.0

30 1.2 0.4 0.0 0.0 0.0

40 1.4 0.4 0.0 0.0 0.0

50 1.4 0.5 0.0 0.0 0.0

60 1.4 0.4 0.0 0.0 0.0

70 1.2 0.4 0.0 0.0 0.0

80 1.3 0.6 0.1 0.0 0.0

90 1.2 0.7 0.1 0.0 0.0

100 1.3 1.1 0.3 0.1 0.0

110 1.2 1.1 0.5 0.2 0.0

120 1.2 1.3 0.7 0.4 0.0

130 1.1 1.4 0.9 0.7 0.0

140 1.3 1.6 0.8 0.6 0.0

150 1.3 1.1 0.3 0.1 0.0

160 1.3 0.9 0.1 0.0 0.0

170 1.3 0.8 0.1 0.0 0.0

180 1.4 0.9 0.1 0.0 0.0

190 1.5 0.9 0.1 0.0 0.0

200 1.3 0.6 0.0 0.0 0.0

210 1.3 0.5 0.0 0.0 0.0

220 1.6 0.5 0.0 0.0 0.0

230 1.6 0.5 0.0 0.0 0.0

240 1.8 0.6 0.1 0.0 0.0

250 1.6 0.8 0.1 0.0 0.0

260 1.5 1.4 0.2 0.0 0.0

270 1.2 1.8 0.6 0.1 0.0

280 1.2 2.0 0.8 0.2 0.0

290 1.1 1.5 0.6 0.2 0.0

300 1.2 1.2 0.4 0.1 0.0

310 1.0 1.0 0.4 0.1 0.0

320 1.0 1.0 0.4 0.1 0.0

330 0.9 0.9 0.3 0.1 0.0

340 1.0 1.0 0.3 0.1 0.0

350 0.9 0.7 0.2 0.1 0.0

360 1.0 0.6 0.1 0.0 0.0






Figure 14. Wind polygon related to RWY position per season –Spring, Summer

0.0 %

0.2 %

0.4 %

0.6 %

0.8 %

1.0 %

1.2 %

1.4 %

1.6 %

1.8 %

2.0 %

0

15

30

45

60

75

90

105

120

135

150

165

180

195

210

225

240

255

270

285

300

315

330

345

Spring (Mar/Apr/May)

Wind speed (kt)

1-5

6-10

11-15

16-25


0.0 %

0.2 %

0.4 %

0.6 %

0.8 %

1.0 %

1.2 %

1.4 %

1.6 %

1.8 %

2.0 %

0

15

30

45

60

75

90

105

120

135

150

165

180

195

210

225

240

255

270

285

300

315

330

345

Summer (Jun/Jul/Aug)

Wind speed (kt)

1-5

6-10

11-15

16-25





Figure 15. Wind polygon related to RWY position per season –Autumn, Winter

0.0 %

0.2 %

0.4 %

0.6 %

0.8 %

1.0 %

1.2 %

1.4 %

1.6 %

1.8 %

2.0 %

0

15

30

45

60

75

90

105

120

135

150

165

180

195

210

225

240

255

270

285

300

315

330

345

Autumn (Sep/Okt/Nov)

Wind speed (kt)

1-5

6-10

11-15

16-25


0.0 %

0.2 %

0.4 %

0.6 %

0.8 %

1.0 %

1.2 %

1.4 %

1.6 %

1.8 %

2.0 %

0

15

30

45

60

75

90

105

120

135

150

165

180

195

210

225

240

255

270

285

300

315

330

345

Winter (Dec/Jan/Feb)

Wind speed (kt)

1-5

6-10

11-15

16-25





Figure 16. Wind polygon related to RWY position – Year

0.0 %

0.2 %

0.4 %

0.6 %

0.8 %

1.0 %

1.2 %

1.4 %

1.6 %

1.8 %

2.0 %

0

15

30

45

60

75

90

105

120

135

150

165

180

195

210

225

240

255

270

285

300

315

330

345

Year (Jan - Dec)

Wind speed (kt)

1-5

6-10

11-15

16-25





Table 105. Frequency of occurrence of concurrent wind direction (in 30° sectors) and speed within specified ranges – January, February (ICAO Model D)

MODEL DAERODROM E: LYB E M ONTH: I

TOTAL NUM BER OF OBSERVATIONS: 138528

LATITUDE: 44° 49' 10'' N

1-5 6-10 11-15 16-20 21-25 26-30 31-35 36-40 TOTAL

CALM 1.1

VARIABLE 7.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 7.8

35-36-01 3.2 1.2 0.4 0.2 0.0 0.0 0.0 0.0 5.0

02-03-04 3.6 1.0 0.1 0.0 0.0 0.0 0.0 0.0 4.7

05-06-07 5.0 1.5 0.0 0.0 0.0 0.0 0.0 0.0 6.6

08-09-10 3.9 1.8 0.6 0.0 0.0 0.0 0.0 0.0 6.3

11-12-13 3.8 3.8 2.3 0.8 0.2 0.0 0.0 0.0 11.0

14-15-16 3.5 2.8 1.8 0.8 0.1 0.0 0.0 0.0 9.0

17-18-19 3.9 3.3 0.1 0.0 0.0 0.0 0.0 0.0 7.3

20-21-22 4.1 1.8 0.0 0.0 0.0 0.0 0.0 0.0 6.0

23-24-25 5.4 2.0 0.1 0.0 0.0 0.0 0.0 0.0 7.6

26-27-28 4.2 6.4 2.3 0.2 0.0 0.0 0.0 0.0 13.1

29-30-31 3.1 3.4 1.6 0.3 0.0 0.0 0.0 0.0 8.5

32-33-34 2.6 2.1 0.9 0.4 0.1 0.0 0.0 0.0 6.1

TOTAL 54.2 31.1 10.2 2.9 0.4 0.1 0.0 0.0 100.0

1-5 6-10 11-15 16-20 21-25 26-30 31-35 36-40 TOTAL

CALM 0.9

VARIABLE 5.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5.3

35-36-01 3.0 1.9 0.5 0.1 0.0 0.0 0.0 0.0 5.6

02-03-04 3.2 1.2 0.1 0.1 0.0 0.0 0.0 0.0 4.6

05-06-07 3.1 1.1 0.0 0.0 0.0 0.0 0.0 0.0 4.3

08-09-10 3.3 2.4 0.7 0.2 0.0 0.0 0.0 0.0 6.6

11-12-13 2.9 3.6 2.9 2.4 0.2 0.0 0.0 0.0 12.0

14-15-16 2.6 4.2 1.5 0.8 0.2 0.0 0.0 0.0 9.4

17-18-19 3.0 4.4 0.3 0.0 0.0 0.0 0.0 0.0 7.7

20-21-22 3.8 1.7 0.0 0.0 0.0 0.0 0.0 0.0 5.6

23-24-25 4.6 1.7 0.0 0.0 0.0 0.0 0.0 0.0 6.4

26-27-28 3.9 6.0 2.1 0.5 0.2 0.0 0.0 0.0 12.6

29-30-31 4.1 4.0 1.9 0.4 0.1 0.0 0.0 0.0 10.5

32-33-34 3.4 3.2 1.6 0.3 0.0 0.0 0.0 0.0 8.5

TOTAL 46.4 35.5 11.6 4.9 0.7 0.0 0.0 0.0 100.0


WIND DIRECTIONWIND SPEED (kt)

FREQUENCIES (%) OF OCCURRENCE OF CONCURRENT WIND DIRECTION (IN 30° SECTORS) AND

SPEED WITHIN SPECIFIED RANGES

LONGITUDE: 20° 18' 25'' E ELEVATION ABOVE M SL: 336 ft

REMARK

M ONTH: I I




Cases when a certain phenomenon is not occurred and frequency is 0 are

shaded white




Table 106. Frequency of occurrence of concurrent wind direction (in 30° sectors) and speed within specified ranges – March, April (ICAO Model D)

MODEL DAERODROM E: LYB E M ONTH: III


LATITUDE: 44° 49' 10'' N

1-5 6-10 11-15 16-20 21-25 26-30 31-35 36-40 TOTAL

CALM 0.8

VARIABLE 5.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 5.1

35-36-01 2.3 2.3 0.8 0.3 0.0 0.0 0.0 0.0 5.7

02-03-04 2.8 1.7 0.3 0.0 0.0 0.0 0.0 0.0 4.8

05-06-07 3.4 1.5 0.1 0.0 0.0 0.0 0.0 0.0 5.0

08-09-10 3.2 2.2 1.3 0.4 0.0 0.0 0.0 0.0 7.1

11-12-13 2.6 2.8 2.6 1.6 0.5 0.1 0.0 0.0 10.2

14-15-16 3.0 3.7 1.2 0.6 0.1 0.0 0.0 0.0 8.5

17-18-19 3.6 5.1 0.7 0.1 0.0 0.0 0.0 0.0 9.5

20-21-22 3.3 2.7 0.3 0.1 0.0 0.0 0.0 0.0 6.3

23-24-25 3.4 2.9 0.3 0.1 0.0 0.0 0.0 0.0 6.7

26-27-28 2.8 6.4 2.5 0.3 0.0 0.0 0.0 0.0 12.0

29-30-31 2.4 4.2 2.5 0.6 0.2 0.0 0.0 0.0 9.9

32-33-34 2.6 3.5 1.5 0.5 0.1 0.0 0.0 0.0 8.2

TOTAL 40.6 39.0 14.0 4.5 0.9 0.2 0.0 0.0 100.0

1-5 6-10 11-15 16-20 21-25 26-30 31-35 36-40 TOTAL

CALM 0.9

VARIABLE 7.9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 7.9

35-36-01 2.5 2.0 0.8 0.1 0.0 0.0 0.0 0.0 5.4

02-03-04 2.7 1.2 0.1 0.0 0.0 0.0 0.0 0.0 4.0

05-06-07 3.0 1.0 0.1 0.0 0.0 0.0 0.0 0.0 4.0

08-09-10 3.4 2.4 0.4 0.1 0.0 0.0 0.0 0.0 6.4

11-12-13 3.3 5.4 3.6 1.9 0.3 0.0 0.0 0.0 14.4

14-15-16 4.2 5.0 1.1 0.5 0.2 0.0 0.0 0.0 10.9

17-18-19 4.3 3.5 0.4 0.0 0.0 0.0 0.0 0.0 8.2

20-21-22 3.9 2.2 0.2 0.0 0.0 0.0 0.0 0.0 6.4

23-24-25 4.2 2.0 0.2 0.0 0.0 0.0 0.0 0.0 6.4

26-27-28 3.2 4.8 2.2 0.6 0.0 0.0 0.0 0.0 10.8

29-30-31 2.6 3.3 1.3 0.5 0.0 0.0 0.0 0.0 7.7

32-33-34 2.1 2.6 1.4 0.3 0.1 0.1 0.0 0.0 6.6

TOTAL 47.2 35.3 11.8 4.0 0.6 0.1 0.0 0.0 100.0






REMARK

M ONTH: IV





shaded white




Table 107. Frequency of occurrence of concurrent wind direction (in 30° sectors) and speed within specified ranges – May, June (ICAO Model D)

MODEL DAERODROM E: LYB E M ONTH: V


LATITUDE: 44° 49' 10'' N

1-5 6-10 11-15 16-20 21-25 26-30 31-35 36-40 TOTAL

CALM 1.1

VARIABLE 9.3 0.1 0.0 0.0 0.0 0.0 0.0 0.0 9.4

35-36-01 2.8 2.0 0.3 0.0 0.0 0.0 0.0 0.0 5.0

02-03-04 2.9 1.4 0.1 0.0 0.0 0.0 0.0 0.0 4.5

05-06-07 3.2 1.0 0.1 0.0 0.0 0.0 0.0 0.0 4.2

08-09-10 3.1 1.5 0.1 0.0 0.0 0.0 0.0 0.0 4.7

11-12-13 3.4 3.4 1.4 0.2 0.0 0.0 0.0 0.0 8.4

14-15-16 4.4 3.3 0.7 0.3 0.0 0.0 0.0 0.0 8.7

17-18-19 5.1 1.6 0.1 0.0 0.0 0.0 0.0 0.0 6.8

20-21-22 5.1 1.6 0.0 0.0 0.0 0.0 0.0 0.0 6.7

23-24-25 6.4 2.4 0.1 0.0 0.0 0.0 0.0 0.0 8.9

26-27-28 4.7 6.1 1.4 0.3 0.1 0.0 0.0 0.0 12.5

29-30-31 3.5 5.1 1.7 0.4 0.2 0.0 0.0 0.0 10.9

32-33-34 2.9 3.7 1.4 0.2 0.0 0.0 0.0 0.0 8.2

TOTAL 56.6 33.2 7.4 1.4 0.2 0.0 0.0 0.0 100.0

1-5 6-10 11-15 16-20 21-25 26-30 31-35 36-40 TOTAL

CALM 1.2

VARIABLE 10.1 0.1 0.0 0.0 0.0 0.0 0.0 0.0 10.2

35-36-01 2.6 2.5 0.4 0.1 0.0 0.0 0.0 0.0 5.6

02-03-04 3.3 1.4 0.1 0.0 0.0 0.0 0.0 0.0 4.8

05-06-07 3.3 1.0 0.1 0.0 0.0 0.0 0.0 0.0 4.4

08-09-10 3.4 1.9 0.2 0.0 0.0 0.0 0.0 0.0 5.5

11-12-13 3.4 2.7 0.9 0.1 0.0 0.0 0.0 0.0 7.0

14-15-16 4.9 3.4 0.6 0.1 0.0 0.0 0.0 0.0 9.1

17-18-19 4.8 2.0 0.1 0.0 0.0 0.0 0.0 0.0 6.9

20-21-22 4.8 1.9 0.1 0.0 0.0 0.0 0.0 0.0 6.8

23-24-25 5.7 2.1 0.5 0.1 0.0 0.0 0.0 0.0 8.5

26-27-28 4.4 5.4 1.3 0.2 0.1 0.0 0.0 0.0 11.5

29-30-31 3.9 5.2 1.2 0.1 0.0 0.0 0.0 0.0 10.4

32-33-34 3.0 4.0 1.2 0.2 0.0 0.0 0.0 0.0 8.3

TOTAL 57.5 33.4 6.7 1.0 0.2 0.0 0.0 0.0 100.0






REMARK

M ONTH: VI





shaded white




Table 108. Frequency of occurrence of concurrent wind direction (in 30° sectors) and speed within specified ranges – July, August (ICAO Model D)

MODEL DAERODROM E: LYB E M ONTH: VII


LATITUDE: 44° 49' 10'' N

1-5 6-10 11-15 16-20 21-25 26-30 31-35 36-40 TOTAL

CALM 1.3

VARIABLE 10.6 0.1 0.0 0.0 0.0 0.0 0.0 0.0 10.7

35-36-01 3.1 2.8 0.4 0.0 0.0 0.0 0.0 0.0 6.5

02-03-04 3.9 1.7 0.0 0.0 0.0 0.0 0.0 0.0 5.6

05-06-07 4.0 1.5 0.1 0.0 0.0 0.0 0.0 0.0 5.5

08-09-10 3.4 2.1 0.3 0.0 0.0 0.0 0.0 0.0 5.7

11-12-13 3.1 3.0 0.8 0.1 0.0 0.0 0.0 0.0 7.0

14-15-16 4.1 2.7 0.5 0.1 0.0 0.0 0.0 0.0 7.5

17-18-19 4.4 1.4 0.1 0.0 0.0 0.0 0.0 0.0 5.9

20-21-22 4.5 1.3 0.1 0.0 0.0 0.0 0.0 0.0 5.9

23-24-25 5.9 1.8 0.1 0.0 0.0 0.0 0.0 0.0 7.8

26-27-28 4.6 4.9 1.2 0.1 0.0 0.0 0.0 0.0 10.8

29-30-31 3.8 4.6 1.3 0.3 0.0 0.0 0.0 0.0 10.0

32-33-34 3.5 5.0 1.2 0.1 0.0 0.0 0.0 0.0 9.9

TOTAL 59.0 32.8 6.0 0.8 0.1 0.0 0.0 0.0 100.0

1-5 6-10 11-15 16-20 21-25 26-30 31-35 36-40 TOTAL

CALM 1.2

VARIABLE 12.8 0.5 0.0 0.0 0.0 0.0 0.0 0.0 13.4

35-36-01 4.2 2.6 0.3 0.0 0.0 0.0 0.0 0.0 7.2

02-03-04 4.6 1.9 0.1 0.0 0.0 0.0 0.0 0.0 6.6

05-06-07 4.8 1.3 0.0 0.0 0.0 0.0 0.0 0.0 6.1

08-09-10 4.0 1.2 0.1 0.0 0.0 0.0 0.0 0.0 5.3

11-12-13 3.5 2.4 1.1 0.4 0.0 0.0 0.0 0.0 7.4

14-15-16 4.2 2.5 0.5 0.1 0.0 0.0 0.0 0.0 7.3

17-18-19 4.6 1.1 0.1 0.0 0.0 0.0 0.0 0.0 5.8

20-21-22 4.7 1.1 0.0 0.0 0.0 0.0 0.0 0.0 5.8

23-24-25 6.2 1.8 0.1 0.0 0.0 0.0 0.0 0.0 8.2

26-27-28 4.7 4.1 1.1 0.1 0.0 0.0 0.0 0.0 10.0

29-30-31 3.7 3.8 0.6 0.1 0.0 0.0 0.0 0.0 8.2

32-33-34 3.8 3.0 0.5 0.1 0.0 0.0 0.0 0.0 7.4

TOTAL 66.0 27.2 4.6 1.0 0.1 0.0 0.0 0.0 100.0

REMARK

M ONTH: VIII





shaded white









Table 109. Frequency of occurrence of concurrent wind direction (in 30° sectors) and speed within specified ranges – September, October (ICAO Model D)

MODEL DAERODROM E: LYB E M ONTH: IX


LATITUDE: 44° 49' 10'' N

1-5 6-10 11-15 16-20 21-25 26-30 31-35 36-40 TOTAL

CALM 1.5

VARIABLE 9.6 0.5 0.0 0.0 0.0 0.0 0.0 0.0 10.1

35-36-01 3.2 2.0 0.2 0.0 0.0 0.0 0.0 0.0 5.4

02-03-04 4.3 1.2 0.1 0.0 0.0 0.0 0.0 0.0 5.7

05-06-07 5.4 1.7 0.1 0.0 0.0 0.0 0.0 0.0 7.1

08-09-10 4.7 4.0 0.5 0.1 0.0 0.0 0.0 0.0 9.2

11-12-13 3.9 4.6 2.1 0.5 0.1 0.0 0.0 0.0 11.4

14-15-16 3.7 2.7 0.8 0.3 0.1 0.0 0.0 0.0 7.7

17-18-19 4.1 1.4 0.2 0.0 0.0 0.0 0.0 0.0 5.7

20-21-22 4.3 1.1 0.1 0.0 0.0 0.0 0.0 0.0 5.5

23-24-25 5.4 1.4 0.2 0.0 0.0 0.0 0.0 0.0 7.1

26-27-28 4.0 4.7 1.0 0.2 0.0 0.0 0.0 0.0 9.9

29-30-31 3.4 3.1 1.0 0.2 0.0 0.0 0.0 0.0 7.7

32-33-34 3.3 2.4 0.4 0.0 0.0 0.0 0.0 0.0 6.1

TOTAL 59.3 31.0 6.7 1.4 0.2 0.0 0.0 0.0 100.0

1-5 6-10 11-15 16-20 21-25 26-30 31-35 36-40 TOTAL

CALM 1.6

VARIABLE 10.6 0.3 0.1 0.0 0.0 0.0 0.0 0.0 11.0

35-36-01 2.7 1.9 0.3 0.0 0.0 0.0 0.0 0.0 4.9

02-03-04 3.7 1.1 0.1 0.0 0.0 0.0 0.0 0.0 4.9

05-06-07 5.0 1.1 0.0 0.0 0.0 0.0 0.0 0.0 6.1

08-09-10 5.5 3.8 0.7 0.0 0.0 0.0 0.0 0.0 9.9

11-12-13 4.6 5.0 3.4 1.0 0.1 0.0 0.0 0.0 14.2

14-15-16 3.8 2.9 1.5 0.6 0.1 0.0 0.0 0.0 8.9

17-18-19 4.3 2.0 0.1 0.0 0.0 0.0 0.0 0.0 6.3

20-21-22 5.0 0.9 0.0 0.0 0.0 0.0 0.0 0.0 5.9

23-24-25 4.5 1.1 0.0 0.0 0.0 0.0 0.0 0.0 5.6

26-27-28 3.5 3.8 1.3 0.2 0.0 0.0 0.0 0.0 8.7

29-30-31 2.8 2.4 0.7 0.3 0.1 0.0 0.0 0.0 6.3

32-33-34 2.6 2.2 0.5 0.2 0.0 0.0 0.0 0.0 5.6

TOTAL 58.6 28.5 8.7 2.3 0.4 0.0 0.0 0.0 100.0






REMARK

M ONTH: X





shaded white




Table 110. Frequency of occurrence of concurrent wind direction (in 30° sectors) and speed within specified ranges – November, December (ICAO Model D)

MODEL DAERODROM E: LYB E M ONTH: XI


LATITUDE: 44° 49' 10'' N

1-5 6-10 11-15 16-20 21-25 26-30 31-35 36-40 TOTAL

CALM 1.5

VARIABLE 9.6 0.1 0.0 0.0 0.0 0.0 0.0 0.0 9.7

35-36-01 1.9 0.6 0.1 0.1 0.0 0.0 0.0 0.0 2.7

02-03-04 3.4 0.4 0.0 0.0 0.0 0.0 0.0 0.0 3.8

05-06-07 4.0 1.1 0.0 0.0 0.0 0.0 0.0 0.0 5.2

08-09-10 4.8 3.0 0.6 0.0 0.0 0.0 0.0 0.0 8.5

11-12-13 4.9 5.9 2.6 1.7 0.6 0.1 0.0 0.0 15.8

14-15-16 4.7 4.7 2.8 1.5 0.4 0.0 0.0 0.0 14.2

17-18-19 5.1 2.7 0.4 0.0 0.0 0.0 0.0 0.0 8.2

20-21-22 3.7 1.6 0.1 0.0 0.0 0.0 0.0 0.0 5.4

23-24-25 4.3 2.0 0.1 0.0 0.0 0.0 0.0 0.0 6.5

26-27-28 3.5 4.2 1.5 0.2 0.0 0.0 0.0 0.0 9.4

29-30-31 2.5 2.3 1.0 0.3 0.0 0.0 0.0 0.0 6.2

32-33-34 1.3 1.1 0.3 0.1 0.0 0.0 0.0 0.0 3.0

TOTAL 54.0 29.6 9.6 4.1 1.0 0.2 0.0 0.0 100.0

1-5 6-10 11-15 16-20 21-25 26-30 31-35 36-40 TOTAL

CALM 1.4

VARIABLE 9.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 9.8

35-36-01 3.0 1.0 0.3 0.1 0.0 0.0 0.0 0.0 4.4

02-03-04 4.6 1.6 0.1 0.0 0.0 0.0 0.0 0.0 6.3

05-06-07 4.1 1.4 0.0 0.0 0.0 0.0 0.0 0.0 5.5

08-09-10 3.0 1.8 0.4 0.1 0.0 0.0 0.0 0.0 5.3

11-12-13 2.8 2.8 1.7 1.3 0.6 0.0 0.0 0.0 9.2

14-15-16 3.9 5.4 2.4 1.5 0.4 0.0 0.0 0.0 13.6

17-18-19 3.2 3.7 0.3 0.0 0.0 0.0 0.0 0.0 7.2

20-21-22 2.7 1.1 0.0 0.0 0.0 0.0 0.0 0.0 3.8

23-24-25 4.5 2.1 0.1 0.0 0.0 0.0 0.0 0.0 6.7

26-27-28 4.4 6.0 1.9 0.5 0.0 0.0 0.0 0.0 12.9

29-30-31 2.9 3.0 1.5 0.4 0.0 0.0 0.0 0.0 7.8

32-33-34 2.7 2.4 0.8 0.2 0.0 0.0 0.0 0.0 6.1

TOTAL 51.6 32.4 9.5 4.1 1.0 0.0 0.0 0.0 100.0

REMARK

M ONTH: XII





shaded white









2.6 Weather phenomena

Meteorological phenomena that may influence the air navigation are presented with the mean number of days with the occurrence per month and for entire year (Table 111). Precipitation may disturb and even canceled aeronautical operations. The amount of the precipitation can influence the use of an aerodrome what depends on the precipitation type, intensity and air temperature. Blizzards, storms and freezing rain can cause many problems on runways. The highest mean number of days with precipitation (in all forms) in the aerodrome area occurs in April (13.9 days) and lowest in February and July (7.8 days). Freezing rain is the phenomenon that occurs in January, February and March. Snowfall (in all forms) occurs from November to March, most often in February, with 8.9 days on average. Thunderstorm is registered from March to December, most often in June (8.8 days).

Table 111. Mean number of days with weather phenomena

Phenomen

a/ Month

FG/FZFG/

MIFG/

VCFG

FZFG DZ/FZDZ FZDZRA/FZRA/S

HRAFZRA SHRA SN/SHSN SHSN TS/VCTS

STRONG

WIND

≥30KT

I 8.6 5.8 1.5 0.3 8.6 0.8 0.6 6.1 0.3 0 1.0

II 6.4 3.8 0.6 0 7.8 0.1 0.5 8.9 0.8 0 0.6

III 1.8 0.6 0.6 0.1 11.4 0.1 2.4 3.5 0.1 0.8 1.5

IV 2.6 0 0.8 0 13.5 0 6.1 0 0 2.3 2.0

V 1.3 0 0.6 0 13.9 0 5.9 0 0 8.4 0.4

VI 1.1 0 1.3 0 12.1 0 5.5 0 0 8.8 0.9

VII 0.9 0 0.5 0 9.5 0 3.8 0 0 7.3 0.8

VIII 2.0 0 0.6 0 7.8 0 4.5 0 0 5.5 0.8

IX 2.6 0 1.8 0 8.4 0 2.4 0 0 2.6 0.6

X 6.3 0 3.5 0 9.3 0 2.1 0 0 0.6 0.8

XI 9.9 3.1 1.3 0.3 9.8 0 1.6 2.3 0.3 0.5 1.9

XII 9.6 5.5 3.0 0.8 12.1 0 1.3 6.3 0.3 0.3 1.4

Year 53.1 18.9 16.1 1.5 124.2 1.0 36.7 27.1 1.8 37.1 12.7

SHSN - shower snow

TS - thunderstorm

VCTS - vinicity thunderstorm

FG - fog DZFZ - freezing drizzle

FZFG - freezing fog RA - rain

MIFG - shallow fog FZRA - freezing rain

VCFG - vicinity fog SHRA - shower rain STRONG WIND ≥30KT

DZ - drizzle SN - snow




Fog is paid special attention to, as the phenomenon of important impact on the visibility of the aerodrome. This phenomenon is presented with the table of the average number of consecutive intervals with fog including all types recorded in METAR reports (Table 112), and with the tables of the relative frequency of fog occurrence, and freezing fog at the aerodrome for specific interval and per month (Tables 113 and 114). Fog normally occurs in the period from November to February. A day with fog is a day during which the occurrence of fog was observed, regardless of the fog duration. Throughout the year, the most frequent fog is the one that lasts from 1 to 8 consecutive intervals (4 hours). Fog with the duration longer than 16 intervals (8 hours) occurs in the period from October to February, but most frequently occurs in November and January. Fog that lasts longer than 24 intervals (12 hours) occurs in the period from November to February. Fog that lasts longer than 48 intervals (24 hours) occurs in the period from November to January, but very rarely. In the period from November to January, fog occurs in all intervals throughout the day but the occurrence probability is higher in the morning hours. Throughout the remainder of the year, the occurrence of fog is mostly characteristic for the morning hours with higher probability in the winter period. Freezing fog occurs in the period from October to March, however its relative frequency is highest in December and January, during the night and morning hours.




Table 112. Average number of consecutive periods with fog

Month/

Number of

consecutive

terms

VI VII VIII IX X XI XII I II III IV V VI Year

1 0.1 0.8 0.8 0.6 1.6 3.4 3.9 3.5 1.6 0.5 0.5 0.5 0.1 17.8

2 0.4 0.1 0.9 0.8 1.9 2.1 2.4 3.5 2.0 0.8 1.3 0.4 0.4 16.4

3 0.4 0.1 0.6 0.6 1.8 1.9 1.5 0.5 1.1 0.5 0.3 0.3 0.4 9.5

4 0.1 0.1 0.0 0.1 0.4 1.5 2.3 0.9 0.8 0.0 0.5 0.1 0.1 6.8

5 0.1 0.1 0.1 0.3 0.5 1.6 1.1 0.8 0.5 0.4 0.3 0.0 0.1 5.8

6 0.1 0.0 0.0 0.1 0.0 1.4 0.8 1.4 0.3 0.0 0.3 0.0 0.1 4.3

7 0.0 0.0 0.0 0.3 0.4 0.6 0.3 0.8 0.4 0.4 0.3 0.1 0.0 3.4

8 0.0 0.1 0.0 0.1 0.1 0.4 0.6 0.1 0.1 0.0 0.0 0.1 0.0 1.8

9 0.0 0.0 0.0 0.0 0.1 0.5 0.6 0.5 0.4 0.1 0.1 0.0 0.0 2.4

10 0.0 0.0 0.1 0.0 0.5 0.4 0.4 0.3 0.4 0.1 0.0 0.0 0.0 2.1

11 0.0 0.0 0.0 0.1 0.1 0.1 0.5 0.3 0.1 0.0 0.0 0.0 0.0 1.3

12 0.0 0.0 0.0 0.0 0.1 0.0 0.1 0.1 0.1 0.0 0.0 0.0 0.0 0.5

13 0.0 0.0 0.1 0.1 0.0 0.4 0.1 0.1 0.4 0.1 0.0 0.0 0.0 1.4

14 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.3 0.3 0.1 0.0 0.0 0.0 0.8

15 0.0 0.0 0.0 0.0 0.4 0.1 0.0 0.3 0.3 0.1 0.0 0.0 0.0 1.1

16 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.3 0.1 0.0 0.0 0.0 0.0 0.6

17 0.0 0.0 0.0 0.0 0.0 0.3 0.0 0.1 0.4 0.0 0.0 0.0 0.0 0.8

18 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.0 0.3 0.0 0.0 0.0 0.0 0.5

19 0.0 0.0 0.0 0.0 0.1 0.0 0.3 0.4 0.1 0.0 0.0 0.0 0.0 0.9

20 0.0 0.0 0.0 0.0 0.0 0.1 0.3 0.1 0.1 0.0 0.0 0.0 0.0 0.6

21 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.4

22 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.1

23 0.0 0.0 0.0 0.0 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3

24 0.0 0.0 0.0 0.0 0.0 0.3 0.1 0.1 0.1 0.0 0.0 0.0 0.0 0.6

25 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.4 0.0 0.0 0.0 0.0 0.0 0.5

26 0.0 0.0 0.0 0.0 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3

27 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.3 0.1 0.0 0.0 0.0 0.0 0.5

28 0.0 0.0 0.0 0.0 0.0 0.0 0.3 0.1 0.1 0.0 0.0 0.0 0.0 0.5

29 0.0 0.0 0.0 0.0 0.0 0.1 0.3 0.1 0.1 0.0 0.0 0.0 0.0 0.6

30 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.0 0.1 0.0 0.0 0.0 0.0 0.4

31 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.1

32 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1

33 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1

34 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1

35 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1

36 0.0 0.0 0.0 0.0 0.0 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3

37 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.1

38 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.1

39 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

40 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

41 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.1

42 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

43 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1

44 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

45 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

46 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

47 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

48 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0

≥49 0.0 0.0 0.0 0.0 0.0 0.4 0.3 0.3 0.0 0.0 0.0 0.0 0.0 0.9

REMARKIncluding: FG, FZFG, MIFG, BCFG I PRFG. Terms are each 30 minutes; Cases when a certain phenomenon is not

occurred and frequency is 0 are shaded white




Table 113. Frequency of fog at aerodrome

MONTH/

TIME(UTC)VI VII VIII IX X XI XII I II III IV V VI

1300 0.0 0.0 0.0 0.0 0.0 2.9 4.0 4.0 1.3 0.0 0.0 0.0 0.0

1330 0.0 0.0 0.0 0.0 0.0 2.9 3.6 5.2 0.9 0.0 0.0 0.0 0.0

1400 0.0 0.0 0.0 0.0 0.0 2.5 4.0 4.4 0.4 0.0 0.0 0.0 0.0

1430 0.0 0.0 0.0 0.0 0.0 3.3 3.6 4.4 0.0 0.0 0.0 0.0 0.0

1500 0.0 0.0 0.0 0.0 0.0 3.3 3.6 5.2 0.0 0.0 0.0 0.0 0.0

1530 0.0 0.0 0.0 0.0 0.0 3.3 3.2 4.8 0.0 0.0 0.0 0.0 0.0

1600 0.0 0.0 0.0 0.0 0.0 4.2 3.2 4.4 0.0 0.0 0.0 0.0 0.0

1630 0.0 0.0 0.0 0.0 0.0 3.8 3.6 3.2 0.0 0.0 0.0 0.0 0.0

1700 0.0 0.0 0.0 0.0 0.0 3.8 4.0 4.8 0.0 0.4 0.0 0.0 0.0

1730 0.0 0.0 0.0 0.0 0.0 3.8 4.0 4.4 0.0 0.4 0.0 0.0 0.0

1800 0.0 0.0 0.0 0.0 0.0 3.3 4.0 5.6 0.4 0.4 0.0 0.0 0.0

1830 0.0 0.0 0.0 0.0 0.4 4.6 4.0 5.6 0.9 0.4 0.0 0.0 0.0

1900 0.0 0.0 0.0 0.0 0.4 5.4 5.2 6.5 0.4 0.4 0.0 0.0 0.0

1930 0.0 0.0 0.0 0.0 0.4 5.4 6.5 7.7 1.3 0.0 0.0 0.0 0.0

2000 0.0 0.0 0.0 0.0 0.8 5.4 7.3 5.6 1.8 0.0 0.0 0.0 0.0

2030 0.0 0.0 0.0 0.4 0.8 5.0 7.7 6.0 2.2 0.0 0.0 0.0 0.0

2100 0.0 0.0 0.0 0.4 1.6 7.1 6.9 6.0 2.7 0.0 0.0 0.0 0.0

2130 0.0 0.0 0.0 0.4 1.2 8.3 8.5 5.2 3.6 0.4 0.4 0.0 0.0

2200 0.0 0.0 0.0 0.4 1.2 7.5 8.5 6.0 2.7 0.4 0.8 0.0 0.0

2230 0.4 0.0 0.0 0.4 1.6 9.2 9.3 7.3 4.5 0.4 0.8 0.0 0.4

2300 0.4 0.0 0.0 0.0 2.0 9.6 11.7 7.7 3.1 0.4 0.0 0.0 0.4

2330 0.4 0.0 0.0 0.0 2.0 10.0 10.9 8.1 3.1 1.2 0.4 0.0 0.4

0000 0.4 0.0 0.0 0.0 1.6 10.4 9.7 10.1 4.9 0.0 0.4 0.4 0.4

0030 0.0 0.0 0.4 1.3 3.2 10.8 9.7 10.9 4.9 0.0 0.8 0.4 0.0

0100 0.4 0.0 0.8 2.1 4.4 13.3 10.5 11.3 5.8 0.0 0.4 0.4 0.4

0130 0.4 0.4 1.2 1.3 4.0 13.8 9.3 12.1 6.7 0.8 0.4 0.4 0.4

0200 0.8 0.4 2.0 2.1 4.8 12.9 10.5 11.3 5.4 1.2 2.1 1.2 0.8

0230 1.3 0.8 2.0 2.1 4.4 13.8 10.1 11.3 4.9 1.2 2.5 1.2 1.3

0300 1.7 1.2 2.0 2.5 4.8 15.8 9.3 10.1 5.4 1.6 2.5 1.2 1.7

0330 2.1 1.2 1.2 3.3 7.3 15.4 8.9 9.3 6.7 1.6 3.8 2.8 2.1

0400 1.7 1.6 2.4 4.6 7.7 15.4 10.5 10.1 8.5 2.0 5.0 2.4 1.7

0430 0.8 0.8 2.4 6.7 8.1 16.3 10.5 10.5 9.4 2.8 5.4 1.6 0.8

0500 0.8 0.8 1.6 6.3 9.3 17.1 10.1 11.3 9.8 3.6 3.8 1.2 0.8

0530 0.4 0.8 2.4 2.1 11.7 20.0 11.3 10.9 9.8 4.0 2.1 0.4 0.4

0600 0.0 0.4 2.0 1.7 9.3 20.8 13.3 10.5 10.3 2.0 1.7 0.0 0.0

0630 0.0 0.0 0.8 1.3 8.1 20.0 13.7 10.9 10.7 1.2 0.4 0.0 0.0

0700 0.0 0.0 0.4 0.8 4.8 15.8 11.7 12.1 10.3 1.2 0.4 0.0 0.0

0730 0.0 0.0 0.4 0.4 3.2 12.5 10.5 13.3 9.8 1.2 0.0 0.0 0.0

0800 0.0 0.0 0.0 0.4 2.0 10.4 9.3 12.9 8.5 0.8 0.0 0.0 0.0

0830 0.0 0.0 0.0 0.0 1.6 9.2 8.5 11.3 9.4 0.4 0.0 0.0 0.0

0900 0.0 0.0 0.0 0.0 1.2 9.2 7.7 10.5 7.1 0.4 0.0 0.0 0.0

0930 0.0 0.0 0.0 0.0 1.2 6.3 7.3 9.7 5.4 0.4 0.0 0.0 0.0

1000 0.0 0.0 0.0 0.0 0.0 6.3 6.5 7.7 3.1 0.4 0.0 0.0 0.0

1030 0.0 0.0 0.0 0.0 0.0 4.2 7.7 6.9 1.8 0.4 0.0 0.0 0.0

1100 0.0 0.0 0.0 0.0 0.0 3.8 6.9 6.9 2.2 0.0 0.0 0.0 0.0

1130 0.0 0.0 0.0 0.0 0.0 3.8 6.0 5.2 1.8 0.0 0.0 0.0 0.0

1200 0.0 0.0 0.0 0.0 0.0 3.3 5.2 4.4 1.3 0.0 0.0 0.0 0.0

1230 0.0 0.0 0.0 0.0 0.0 2.9 5.2 4.0 1.3 0.0 0.0 0.0 0.0

1300 0.0 0.0 0.0 0.0 0.0 2.9 4.0 4.0 1.3 0.0 0.0 0.0 0.0

REMARKIncluding: FG, FZFG, MIFG, BCFG I PRFG. Terms are each 30 minutes; Cases when a certain phenomenon is not

occurred and frequency is 0 are shaded white




Table 114. Frequency of freezing fog at aerodrome

MONTH/

TIME(UTC)VI VII VIII IX X XI XII I II III IV V VI

1300 0.0 0.0 0.0 0.0 0.0 1.3 2.4 2.0 0.4 0.0 0.0 0.0 0.0

1330 0.0 0.0 0.0 0.0 0.0 1.3 2.4 1.6 0.0 0.0 0.0 0.0 0.0

1400 0.0 0.0 0.0 0.0 0.0 1.3 3.2 1.6 0.0 0.0 0.0 0.0 0.0

1430 0.0 0.0 0.0 0.0 0.0 1.3 2.4 2.0 0.0 0.0 0.0 0.0 0.0

1500 0.0 0.0 0.0 0.0 0.0 1.3 2.8 2.4 0.0 0.0 0.0 0.0 0.0

1530 0.0 0.0 0.0 0.0 0.0 1.7 2.4 2.8 0.0 0.0 0.0 0.0 0.0

1600 0.0 0.0 0.0 0.0 0.0 1.7 2.8 2.8 0.0 0.0 0.0 0.0 0.0

1630 0.0 0.0 0.0 0.0 0.0 1.7 2.8 1.6 0.0 0.0 0.0 0.0 0.0

1700 0.0 0.0 0.0 0.0 0.0 1.7 2.8 3.2 0.0 0.4 0.0 0.0 0.0

1730 0.0 0.0 0.0 0.0 0.0 1.7 3.2 2.8 0.0 0.4 0.0 0.0 0.0

1800 0.0 0.0 0.0 0.0 0.0 1.7 3.6 3.2 0.0 0.4 0.0 0.0 0.0

1830 0.0 0.0 0.0 0.0 0.0 2.1 3.6 3.2 0.0 0.4 0.0 0.0 0.0

1900 0.0 0.0 0.0 0.0 0.0 2.1 4.0 4.0 0.0 0.4 0.0 0.0 0.0

1930 0.0 0.0 0.0 0.0 0.0 1.7 5.2 5.6 0.9 0.0 0.0 0.0 0.0

2000 0.0 0.0 0.0 0.0 0.0 1.3 5.6 4.8 1.3 0.0 0.0 0.0 0.0

2030 0.0 0.0 0.0 0.0 0.0 1.3 6.5 4.0 2.2 0.0 0.0 0.0 0.0

2100 0.0 0.0 0.0 0.0 0.0 1.3 5.6 3.6 2.2 0.0 0.0 0.0 0.0

2130 0.0 0.0 0.0 0.0 0.0 1.3 6.0 3.6 3.1 0.4 0.0 0.0 0.0

2200 0.0 0.0 0.0 0.0 0.0 1.3 6.0 4.0 2.2 0.4 0.0 0.0 0.0

2230 0.0 0.0 0.0 0.0 0.0 1.7 6.9 4.4 3.6 0.4 0.0 0.0 0.0

2300 0.0 0.0 0.0 0.0 0.4 1.7 7.7 4.8 2.7 0.4 0.0 0.0 0.0

2330 0.0 0.0 0.0 0.0 0.4 1.7 7.3 4.8 2.7 0.4 0.0 0.0 0.0

0000 0.0 0.0 0.0 0.0 0.0 2.5 6.9 6.5 4.5 0.0 0.0 0.0 0.0

0030 0.0 0.0 0.0 0.0 0.0 2.5 6.0 6.9 4.5 0.0 0.0 0.0 0.0

0100 0.0 0.0 0.0 0.0 0.0 2.5 6.5 7.3 4.5 0.0 0.0 0.0 0.0

0130 0.0 0.0 0.0 0.0 0.0 2.9 6.9 8.5 4.9 0.0 0.0 0.0 0.0

0200 0.0 0.0 0.0 0.0 0.0 2.5 6.9 7.3 4.5 0.4 0.0 0.0 0.0

0230 0.0 0.0 0.0 0.0 0.0 2.9 6.5 7.3 4.0 0.8 0.0 0.0 0.0

0300 0.0 0.0 0.0 0.0 0.0 3.3 6.0 6.5 4.9 0.8 0.0 0.0 0.0

0330 0.0 0.0 0.0 0.0 0.0 3.8 6.5 6.0 5.4 0.4 0.0 0.0 0.0

0400 0.0 0.0 0.0 0.0 0.0 5.0 6.9 7.3 6.3 0.4 0.0 0.0 0.0

0430 0.0 0.0 0.0 0.0 0.0 5.0 6.5 7.3 6.7 0.8 0.0 0.0 0.0

0500 0.0 0.0 0.0 0.0 0.0 5.0 7.3 8.1 6.3 1.2 0.0 0.0 0.0

0530 0.0 0.0 0.0 0.0 0.0 6.3 7.7 7.3 5.8 0.8 0.0 0.0 0.0

0600 0.0 0.0 0.0 0.0 0.0 5.8 8.1 6.9 7.1 0.8 0.0 0.0 0.0

0630 0.0 0.0 0.0 0.0 0.0 6.7 8.5 7.7 7.6 0.8 0.0 0.0 0.0

0700 0.0 0.0 0.0 0.0 0.0 5.8 6.5 7.7 6.7 0.8 0.0 0.0 0.0

0730 0.0 0.0 0.0 0.0 0.0 4.2 6.5 9.3 7.1 0.8 0.0 0.0 0.0

0800 0.0 0.0 0.0 0.0 0.0 3.3 6.5 8.9 5.4 0.4 0.0 0.0 0.0

0830 0.0 0.0 0.0 0.0 0.0 2.9 5.6 7.7 5.4 0.4 0.0 0.0 0.0

0900 0.0 0.0 0.0 0.0 0.0 2.9 5.2 7.3 4.5 0.4 0.0 0.0 0.0

0930 0.0 0.0 0.0 0.0 0.0 2.9 4.8 5.6 2.7 0.4 0.0 0.0 0.0

1000 0.0 0.0 0.0 0.0 0.0 2.1 3.6 5.2 1.8 0.4 0.0 0.0 0.0

1030 0.0 0.0 0.0 0.0 0.0 2.1 4.0 4.0 0.9 0.4 0.0 0.0 0.0

1100 0.0 0.0 0.0 0.0 0.0 2.1 4.0 3.6 1.8 0.0 0.0 0.0 0.0

1130 0.0 0.0 0.0 0.0 0.0 1.7 3.2 2.4 1.3 0.0 0.0 0.0 0.0

1200 0.0 0.0 0.0 0.0 0.0 1.7 2.8 2.0 0.9 0.0 0.0 0.0 0.0

1230 0.0 0.0 0.0 0.0 0.0 1.3 2.4 2.0 0.4 0.0 0.0 0.0 0.0

1300 0.0 0.0 0.0 0.0 0.0 1.3 2.4 2.0 0.4 0.0 0.0 0.0 0.0




3 LIST OF FIGURES

Figure 1. An example of the chart showing relative frequency of the observed parameter .... 4

Figure 2. An example of the chart showing average number of days of the event occurrence4

Figure 3. An example of the chart showing average value of the observed parameter ........... 4

Figure 4. Wind polygon – January, February ......................................................................... 100

Figure 5. Wind polygon – March, April .................................................................................. 101

Figure 6. Wind polygon – May, June ...................................................................................... 102

Figure 7. Wind polygon – July, August ................................................................................... 103

Figure 8. Wind polygon – September, October ..................................................................... 104

Figure 9. Wind polygon – November, December .................................................................. 105

Figure 10. Wind polygon per season – Spring, Summer ........................................................ 106

Figure 11. Wind polygon per season – Autumn, Winter ....................................................... 107

Figure 12. Wind polygon – yearly .......................................................................................... 108

Figure 13. Wind polygon related to RWY position per season –Spring, Summer ................. 126

Figure 14. Wind polygon related to RWY position per season –Autumn, Winter................. 127

Figure 15. Wind polygon related to RWY position – Year ..................................................... 128




4 LIST OF TABLES

Table 1. Average monthly and yearly air temperature, air temperature exstremes, average

number of days within specified values of air temperature ..................................................... 8

Table 2. Average air temperature per month and for year ....................................................... 9

Table 3. Frequencies of surface temperature in specified ranges of 5°C at the specified times

– January (ICAO Model E) ........................................................................................................ 10


– February (ICAO Model E) ...................................................................................................... 11


– March (ICAO Model E) .......................................................................................................... 12


– April (ICAO Model E) ............................................................................................................. 13


– May (ICAO Model E) .............................................................................................................. 14


– June (ICAO Model E) ............................................................................................................. 15


– July (ICAO Model E) ............................................................................................................... 16

Table 10. Frequencies of surface temperature in specified ranges of 5°C at the specified

times – August (ICAO Model E) ................................................................................................ 17


times – September (ICAO Model E) ......................................................................................... 18


times – October (ICAO Model E) .............................................................................................. 19


times – November (ICAO Model E) .......................................................................................... 20


times – December (ICAO Model E) .......................................................................................... 21

Table 15. Average monthly and yearlye relativ humidity, absolute minimum of relative

humidity, average number of days within specified values of relative humudity .................. 22

Table 16. Average relative humudity (%)................................................................................. 24




Table 17. Average number of cases when Т-Тd=0 ................................................................... 25





Table 22. Average number of cases when Т-Тd>4 ................................................................... 30

Table 23. Monthly and yearly frequencies of air pressure (%) ................................................ 31

Table 24. Average air pressure (hPa) at specificied times ....................................................... 31

Table 25. Average air pressure (hPa) ....................................................................................... 32

Table 26. Frequencies of visibility below specified values at specified times – January (ICAO

Model B) ................................................................................................................................... 34

Table 27. Frequencies of visibility below specified values at specified times – February (ICAO

Model B) ................................................................................................................................... 35

Table 28. Frequencies of visibility below specified values at specified times – March (ICAO

Model B) ................................................................................................................................... 36

Table 29. Frequencies of visibility below specified values at specified times – April (ICAO

Model B) ................................................................................................................................... 37

Table 30. Frequencies of visibility below specified values at specified times – May (ICAO

Model B) ................................................................................................................................... 38

Table 31. Frequencies of visibility below specified values at specified times – June (ICAO

Model B) ................................................................................................................................... 39

Table 32. Frequencies of visibility below specified values at specified times – July (ICAO

Model B) ................................................................................................................................... 40

Table 33. Frequencies of visibility below specified values at specified times – August (ICAO

Model B) ................................................................................................................................... 41

Table 34. Frequencies of visibility below specified values at specified times – September

(ICAO Model B) ........................................................................................................................ 42

Table 35. Frequencies of visibility below specified values at specified times – October (ICAO

Model B) ................................................................................................................................... 43




Table 36. Frequencies of visibility below specified values at specified times – November

(ICAO Model B) ........................................................................................................................ 44

Table 37. Frequencies of visibility below specified values at specified times – December

(ICAO Model B) ........................................................................................................................ 45

Table 38. Frequencies of visibility < 200 m (based on ICAO Model B) .................................... 46




Table 42. Frequencies of visibility < 1500 m (based on ICAO Model B) .................................. 50




Table 46. Frequencies of the height of the base of the lowest cloud layer of BKN or OVC

extent below specified values at specified times – January (ICAO Model C) .......................... 55


extent below specified values at specified times – February (ICAO Model C) ........................ 56


extent below specified values at specified times – March (ICAO Model C) ............................ 57


extent below specified values at specified times – April (ICAO Model C) ............................... 58


extent below specified values at specified times – May (ICAO Model C) ............................... 59


extent below specified values at specified times – June (ICAO Model C) ............................... 60


extent below specified values at specified times – July (ICAO Model C) ................................ 61


extent below specified values at specified times – August (ICAO Model C) ........................... 62


extent below specified values at specified times – September (ICAO Model C) .................... 63





extent below specified values at specified times – October (ICAO Model C) ......................... 64


extent below specified values at specified times – November (ICAO Model C) ..................... 65


extent below specified values at specified times – December (ICAO Model C)...................... 66

Table 58. Frequencies of the height of the base of the lowest cloud layer of BKN or OVC <

100 ft (based on ICAO Model C) .............................................................................................. 67








1000 ft (based on ICAO Model C) ............................................................................................ 71


1500 ft (based on ICAO Model C) ............................................................................................ 72

Table 64. Frequencies of the occurrence of runway visual range/visibility and/or height of

the base of the lowest cloud layer of BKN or OVC extent below specified values at specified

times for TDZ 12 – January (ICAO Model A) ........................................................................... 74



times for TDZ 12 – Frbruary (ICAO Model A) .......................................................................... 75



times for (TDZ 12) – March (ICAO Model A) ........................................................................... 76



times for TDZ 12 – April (ICAO Model A) ................................................................................ 77



times for TDZ 12 – May (ICAO Model A) ................................................................................. 78






times for TDZ 12 – June (ICAO Model A) ................................................................................ 79



times for TDZ 12 – July (ICAO Model A) .................................................................................. 80



times for TDZ 12 – August (ICAO Model A) ............................................................................. 81



times for TDZ 12 – September (ICAO Model A) ...................................................................... 82



times for TDZ 12 – October (ICAO Model A) ........................................................................... 83



times for TDZ 12 – November (ICAO Model A) ....................................................................... 84



times for TDZ 12 – December (ICAO Model A) ........................................................................ 85



times for TDZ 30 – January (ICAO Model A) ........................................................................... 86



times for TDZ 30 – February (ICAO Model A) ......................................................................... 87



times for TDZ 30 – March (ICAO Model A) ............................................................................. 88



times for TDZ 30 – April (ICAO Model A) ................................................................................ 89






times for TDZ 30 – May (ICAO Model A) ................................................................................. 90



times for TDZ 30 – June (ICAO Model A) ................................................................................ 91



times for TDZ 30 – July (ICAO Model A) .................................................................................. 92



times for TDZ 30 – August (ICAO Model A) ............................................................................. 93



times for TDZ 30 – September (ICAO Model A) ...................................................................... 94



times for TDZ 30 – Oktober (ICAO Model A)........................................................................... 95



times for TDZ 30 – November (ICAO Model A) ....................................................................... 96



times for TDZ 30 – December (ICAO Model A) ....................................................................... 97

Table 88. Frequencies of occurrence of wind directions within specified speed ranges –

January ................................................................................................................................... 109


February ................................................................................................................................. 110


March ..................................................................................................................................... 111

Table 91. Frequencies of occurrence of wind directions within specified speed ranges – April

................................................................................................................................................ 112

Table 92. Frequencies of occurrence of wind directions within specified speed ranges – May

................................................................................................................................................ 113




Table 93. Frequencies of occurrence of wind directions within specified speed ranges – June

................................................................................................................................................ 114

Table 94. Frequencies of occurrence of wind directions within specified speed ranges – July

................................................................................................................................................ 115


August .................................................................................................................................... 116


September .............................................................................................................................. 117


October .................................................................................................................................. 118


November .............................................................................................................................. 119


December ............................................................................................................................... 120


Spring ..................................................................................................................................... 121


Summer .................................................................................................................................. 122


Autmn .................................................................................................................................... 123


Winter .................................................................................................................................... 124


Year ........................................................................................................................................ 125

Table 105. Frequencies of occurrence of concurrent wind direction (in 30° sectors) and

speed within specified ranges – January, February (ICAO Model D) .................................... 129


speed within specified ranges – March, April (ICAO Model D) ............................................. 130


speed within specified ranges – May, June (ICAO Model D) ................................................. 131

Table 108. Frequencies of occurrence od concurrent wind direction (in 30° sectors) and

speed within specified ranges – July, August (ICAO Model D) .............................................. 132





speed within specified ranges – September, October (ICAO Model D) ................................ 133


speed within specified ranges – November, December (ICAO Model D).............................. 134

Table 111. Mean number of days with weather phenomena ............................................... 135

Table 112. Average number of consecutive terms with fog .................................................. 137

Table 113. Frequencies of fog at aerodrome ........................................................................ 138

Table 114. Frequencies of freezing fog at aerodrome .......................................................... 139
