road accident severity may be influenced by a number of various systematic causal factors. the weather and road accidents have a close relationship with each other and a number of methods have been proposed for measuring the risk of a road accident with rainy, foggy, and snowy weather and high winds. recent studies indicate that road collision rates increase during precipitation. the weather wa...

introduction frost is one of the most hazardous natural phenomena which it is at times accompanied by abundant damages in the life and properties. freezing and frost are very important for agricultural products in different stages of the growth. this is because, in case of happening, it results in the reduction of the products. frost is the stage of water freezing. in such condition, when the a...

Simplifications used in regional climate models decrease the accuracy of the regional climate models. To overcome this deficiency, usually a statistical technique of MOS is used to improve the skill of gridded outputs of the Numerical Weather Prediction (NWP) models. In this paper, an experimental synoptic-climatology based method has been used to calibrate, and decrease amount of errors in GFS...