Meteorology

METEOROLOGICAL MEASUREMENTS AND OBSERVATIONS

Besides being the workplace of the Department of Air Quality, the Košetice observatory is a professional meteorological station. Within the professional meteorological network, it carries out measurements of a wide range of meteorological elements.

Synoptic measurement includes the following elements: air temperature, air pressure, vapour pressure, air humidity, dew point temperature, wind speed and direction, amount and type of precipitation, sunshine duration, visibility, weather conditions and past weather, type of cloudiness, extent of cloud cover, soil temperature (at depths of 5, 10, 20, 50, 100 cm), soil moisture (at depths of 7, 25 and 75 cm), vapour, depth of new snow cover, maximum, minimum and ground temperature. These values are transmitted every hour to the Central Forecasting Office in Prague and serve as background for weather forecasts.

Climatological measurement has a narrower range of measured elements: air temperature, air pressure, air humidity, wind speed and direction, amount of precipitation, sunshine duration, visibility, type of cloudiness, extent of cloud cover, soil temperature (at depths of 5, 10, 20, 50 and 100 cm), depth of new snow cover, evaporation. Values are measured on climatological times of observation at 7, 14 and 21 h.

stanice_AMS_AMS1

Fig. 1 Overview of automated stations with continuous operation by a professional meteorologist. Red squares indicate automatic weather stations. The surveillance is provided by a professional meteorologist, the operation is ensured by the Professional Station Network Section (OPSS), Aeronautical Meteorological Section (OLM) of the Czech Hydrometeorological Institute (CHMI) in Prague or administered by the Army of the Czech Republic (ACR) or the Institute of Atmospheric Physics (ÚFA of CAS). The main task is to carry out synoptic measurements and observations, which are sent every hour in the SYNOP report to the centre at Prague-Komořany. Climatological observations are also part of the measurements. The light red squares indicate automated combined-type stations. Source: www.chmi.cz

THE POSITION OF THE KOŠETICE METEOROLOGICAL STATION IN THE CZECH REPUBLIC:

Average temperature from the records at the Košetice station in 1988–2017 (8.1 °C) is almost identical to the average of the Czech Republic (8.2 °C). Average temperatures at the South Moravian (9.2 °C) and Central Bohemian regions (8.9 °C) are above the average in this period. By contrast, records at the Plzeň region are below the average (7.9 °C). The lowest annual average temperature was registered in 1996. The highest average annual temperature within the Czech Republic was reached in 2014 and 2015 (9.4 °C). In 2015, the Košetice station registered an average annual temperature of 9.1 °C.

The average annual precipitation amount registered at the Košetice station in the 1988–2017 period (650 mm) is below the Czech Republic's average (677 mm). The stations in the South Moravian (547 mm) and the Central Bohemian region together with Prague (586 mm) are below the average in terms of precipitation. The highest average annual amounts were registered in the Liberec (860 mm) and Moravian-Silesian region (798 mm). The most lacking year in terms of precipitation was 2003 when the annual average precipitation amount in the Czech Republic was only 504 mm. The years 2002 and 2010 can be classified as abundant in terms of precipitation.

The dominant western wind direction is characteristic for the Košetice station, as well as for other stations such as Tušimice, Kocelovice, Kostelní Myslová, Milešovka and Hradec Králové. In the Czech Republic there are stations with predominant south-western (e.g. Cheb, Plzeň-Dobřany, Churáňov, Praha-Ruzyně, and Ostrava-Mošnov), northern (Krnov) or southern (Svratouch) wind direction.

The largest number of storms appear in June and July (on average about 3.5 days a month) as well as at other stations. The third most frequent occurrence of storms is observed in May, which can be noted at other stations as well (e.g. Hradec Králové, Luka, Přibyslav, Červená, Mošnov, Liberec). In the Czech Republic, however, it is often August being the third month with the highest number of storms (e.g. Kocelovice, Churáňov, České Budějovice, Svratouch, Karlovy Vary).

Fogs occur at the Košetice station most frequently in October and November (over 6 days a month in the average), similar to the stations in Ústí nad Labem-Kočkov, Liberec, Karlovy Vary. The smallest numbers of foggy days appear in June and August.

Source: CHMI; TOLASZ, Radim et al., Climate Atlas of Czechia, Prague: CHMI, UPOL, 2007

Results (only in Czech): 

Průměrné roční teploty a srážkové úhrny 1988–2017.                          Srovnání průměrných měsíčních teplot v jednotlivých dekádách 1988–2017.                                                    Srovnání průměrných měsíčních srážkových úhrnů v jednotlivých dekádách 1988–2017.

Průměrné roční teploty a srážkové                     Průměrné měsíční teploty v dekádách 1988–2017.                   Průměrné měsíční srážkové úhrny v dekádách 1988–2017. 
úhrny 1988–2017.
 

Počet tropických, letních, mrazových, ledových a arktických dnů 1988–2017.                             Počet dni se sněhem a výška sněhové pokrývky 1988–2017.                                                    Průměrná délka slunečního svitu 1989– 2017.

Počet charakterizovaných dní 1988–2017.         Počet dni se sněhem a výška sněhové pokrývky 1988–2017.    Průměrná délka slunečního svitu 1989– 2017.

 

Průměrné počet dní s výskytem mlhy  2001–2017.                                    Průměrné počet dní s výskytem bouřky  2001–2017.

Průměrný počet dní s výskytem mlhy 2001–2017.   Průměrný počet dní s výskytem bouřky 2001–2017.

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