HEAVY PRECIPITATION OCCURRENCE OVER KHERSON WEATHER STATION ACCORDING TO METEOROLOGICAL OBSERVATIONS AND ERA5 REANALYSIS
Abstract
The paper presents the results of a study of heavy precipitation in the form of rain (> 30 mm/12 h) using data from the meteorological observations and atmospheric reanalysis ERA5 at the Kherson weather station in 2005-2021.
Detected that at the Kherson there were only 19 cases of heavy rainfall, which occurred only in the warm half of the year with a maximum recurrence in July. Compared to 1961-1990, the number of heavy rains of 2005-2021 increased in July and June, and decreased in August.
Determined that most of the real cases of increased precipitation in Kherson are in good agreement with the results of the ERA5 reanalysis, but in almost a third of the simulation episodes did not show heavy precipitation at the Kherson coordinates or their center was shifted.
Heavy rains in Kherson were formed in a field of low atmospheric pressure, with a weak northwest wind and accompanied by thunderstorms.
Clarified that most episodes of heavy rainfall in Kherson in 2005-2021 are associated with the movement of southern cyclones, others formed on the southern periphery of the anticyclone in the southwestern direction of the jet stream in the troposphere.
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