Extreme weather types in Lublin and their circulation conditions in the years 1951–2015

Abstract

To determine extreme weather types in Lublin, in the years 1951-2015, the typology of Woś was applied. It provided a basis for the designation of two extreme thermal types: one with hot and one with very frosty weather. Furthermore, a type of weather with intensive precipitation, not included in the original version of the classification, was analysed. Meteorological data used in the study were obtained from the Meteorological Observatory of the Department of Meteorology and Climatology of the Maria Curie-Skłodowska University in Lublin. The circulation conditions were determined based on the classification of circulation types for the area of Central-Eastern Europe. In the years 1951-2015 extreme weather types occurred in Lublin for 5 days in a year on average. Days with the hot weather type were recorded most frequently. Their occurrence was favoured by air advection from the southern or eastern sector with a transitional or anticyclonic character. In the analysed multi-annual period an increasing tendency in the number of such days was observed. The number of days with the very frosty weather type, primarily related to the advection of air masses from the east, decreased. In the case of the number of days with the weather type with intensive precipitation no evident tendency of changes was determined in the analysed period.