Based on the reanalysis data of the upper air grid point from NCEP during 1967一2000，the(harac;teristi<、of both upper and lower air(irc;ulation(urgent fields under the(ondition of heavy or torrential rains were analyzed and the(limatic; models of three upper and lower air(irc;ulation patterns and their departure difference fields were established month by month in May to September by experience and statistical method.  Thus the essential theoretical foundation for analyzing weather forecast result establishing predicting factors data and setting up the model of short range forecast has been provided