In the light of Wuhan and Yichang digitized radar echo data obtained during 1987-1989, the heavy rain occurrences in Hubei province in spring and summer are classified iuto five types, namely, meso-α scale heavy rain cloud cluster, cold front heavy rain, convective rain band in warm areas, landing typhoon, and multicell or snpercell. some eharacteristics of theirmesoscale structures and evolution. processes are described in this study.