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Atmospheric precipitation is one of the most important features of the climate. The research of the territorial distribution of the precipitation amount has a considerable practical, applicative and theoretical interest. Thus, the study of all the extreme and complex conditions of formation and falling of precipitation in the central area of the Romanian plain is necessary for the use of water according to the distribution of the precipitation regime as well for the prevention and combating on their negative effects. These may have various causes: frontal rainfall in the case of Atlantic cyclones and Mediterranean cyclones on various tracks, and convective cells forming within the air masses or under the action of radiation cooling processes or by the development of thermal convection (clouds with vertical development). In this paper, we have analyzed the synoptic conditions that generate precipitation in the central part of the Romanian Plain. Thus, with the help of the ROCADA database, all the days between 1981-2013 time period that gathered more than 10 mm amount of precipitation were extracted. The data were chosen for an area delimited by 44°42’ and 43°37’ N, and 23°56’ and 26°35’ E coordinates, assigned to our study area. The days were analyzed from a synoptic point of view using the maps available in the Global Forecast System reanalysis, on the www.wetter3.de website. This brought about seven synoptic causes that generate precipitation, represented by the Atlantic cyclones, Mediterranean cyclones with a type I, II and IV track according to the Bordei-Ion classification [1], high altitude cut-off low cyclones and by the high atmospheric instability periods represented by the long-wave troughs and also by the warm air advection in a high pressure atmospheric condition.

ATMOSPHERIC PRECIPITATIONS GREATER THAN 10 MM IN THE CENTRAL PART OF THE ROMANIAN PLAIN AND THEIR SYNOPTIC CAUSES