Thermodynamic analysis of heavy rains caused by the phenomenon cut-off low central and South-West of Iran (Case Study: Event precipitation Persian date December 1, 2008)

In this study, one of the heaviest rainfalls in southwest and central areas of Iran (09/11/87) over the last four years (1387 to 1390) because of the occurrence of the phenomenon cut-off low,. The purpose of this study is to explore the thermodynamic it will rain. First days of rain precipitation data were obtained from the meteorological precipitation zonation map was, charts Holf - Moller and relative vorticity for the days of the draw. The results showed that the index the instability of the heavy rainfall was considerably for on the map it was not an especially severe precipitation is not particularly high rates the anti-cyclone over the Arabian moisture settled on the Red Sea, Arabian Sea and Gulf of Aden to the south west and central areas of the injected The supply of humidity and precipitation has. Also suggests that a significant amount of relative vorticity the position of the trough axis over the Persian Gulf and southern Arabia and quantity relative vorticity values are consistent with each other