The analysis of the frequency and the trend of the squall phenomenon in the Western Romanian Plain, North of Mures River.

In this paper, we used the meteorological data concerning the annual number of days with squall in the period 1961-2002, from 10 weather stations. The study was based on the analysis of the frequency and the trend of the phenomenon. We delimited the areas with the highest frequency of occurrence of the squall and established the causes of this frequency. It results that on the analysed territory, the most frequent cases of squalls are located in the low Somes Plain, at the eastern limit of Crisuri and Arad Plains, at their contact with Crisana Hills and Zarand Mountains, as well as to the South of Mures River, in Aranca Plain. The phenomenon recorded an increasing trend only in the southern part of the territory, due to the increase of air temperature during the last decade, which affected more this area.