Abstract:Using CINRAD SA Doppler radar data in Fuyang, as well as weather cha rt, and the observation data at upper air and surface, a severe storm weather p rocess occurring in the northern region of Huaihe River on July 16, 2005 is anal yzed. The results show that this is a severe convective weather process with cat astrophic gale, rainstorm and local hailstone，and it was caused by a bow meso β scale squall line echo belt，which was triggered by arc gust front in the ear lier time. Further, the dry cold air into the cloud region at the middle level i ntensify the downdraft and the lower level outflow, and then the gust front was formed. On the other hand，an initial attempt to do nowcasting was made in terms of the synthetical application of various radar products. 