THE UTCI INDEX IN LESKO AND LUBLIN AND ITS CIRCULATION DETERMINANTS

In Lesko and Lublin, Poland, from 1981 to 2005, the UTCI values were calculated for 8 observation terms a day. The frequency of the UTCI classes determined as ‘cold stress’ was dominant in Lesko and in Lublin (65-66%). The frequency of classes determined as ‘heat stress’ was observed in 3% of all situations. On the other hand, restricted to the 12 UTC July and August term, the frequency of heat stress classes exceeded 40% in Lublin. Correlation between the UTCI in Lesko and Lublin (Poland) was stronger in spring and autumn than in summer and winter. Correlation between the UTCI and the meridional circulation index was more significant than between the UTCI and zonal circulation index in the period from April to November in both stations. The opposite situation occurred in February.