Abstract

Summer heat and drought conditions, especially in the southern half of Iran's air sovereignty is recognized. In order to investigate the synoptic conditions - scanning the effect of unusual rain event for summer 12 to 6 September 2008 (22-16 September 1387) in the southern Zagros range, environmental approach to sightseeing and daily statistics recording station 270 Days of rain detected. Then, sea level pressure, geopotential height, wind, and humidity level of 500 hPa moisture convergence from the databases of the National Center for Atmospheric Research predicted environmental and United States (NOAA) mining and anomaly parameters according to the average 65-year term (2012 - 1948) were calculated and compared with the conditions of the day. So dominant pattern of rainfall associated with the monsoon days, the general rule and it depends on the same pattern as the cold season patterns. Deviation from the mean sea level pressure in the low pressure and high pressure in the North Caspian Sea, Persian Gulf and the resulting pressure gradient along the Zagros Mountains and formed over the region lives in front of an obstacle in the direction of ups and downs westerly winds anomally In addition, the negative 500 hPa level rise caused by moisture entering the Mediterranean and Red seas, and the resulting rainfall is provided. Keywords: summer rain, high pressure subtropical, anomaly, south zagros,