Thunderstorm simulation using WRF model in Kermanshah Case Study: March 31, 2014

To study the atmospheric structure at the time of Thunder storm occurrence in Kermanshah province, were used the transmitted codes from synoptic stations of the province. To study the atmospheric structure, the sea level pressure parameters, geopotential heights, specific humidity, Uwnd and Vwnd were obtained from the NCEP / NCAR Web site, and Radio sonde data was used for intermediate studies. To illustrate this phenomenon, the WRF model was used with a resolution of 15 km. Finally, in order to evaluate the model output in the rainfall section, the estimated rainfall values of the TRMM sensor. The results showed that the cold weather and the formation of a deep cave on the west of Iran, the emergence of severe pressure gradient in the northwest and west of the country and the formation of a cold front in the region, were the main synoptic factors during the storm. Also, the role of the Arabian Sea, Red Sea and Persian Gulf can be mentioned in providing rain water resources. On the other hand, extreme climbs of the air have played a major role in the formation of bubble clouds and hailstones. The review and evaluation of the WRF model output (Estimated precipitation is 18 mm) and TRMM sensor (Estimated precipitation is 19 mm) compared to reported rainfall from stations (Estimated precipitation is 17 mm) showed that this model with RMSE=1 mm is suitable for exploring the structure of atmosphere in the region to dynamically visualize intermediate scale phenomena such as thunder storms.