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. 