Based on NWP,synoptic charts,satellite image and hourly self-record rain fall,wind data at 4 stations in Bohai Seand other 4 stations,from 1992 to 2001,the comprehensive comparison and analysis of 18 cases of heavy rain and 8 casesf heavy snow are made. The effect of wind on rainfall area is studied. From 2000 to 2003,the TS value is 53%.