Based on the conventional observation data，Doppler radar products and observations of automatic meteorological station，the paper analyzed a heavy hailstorm weather occurred in the south edge of Zhunger Basin on May 2，2010 from weather situation，cloud images change，evolution of physical quantity field and radar echo．The results showed that the hail weather occurred under the weather condition of unstable convective stratification，dry and cold at the middle or upper layer，but humid at the low layer;abundant vapor condition，a  esoscale convergent shear on the ground，the suited height of the 0℃layer and－20℃layer，strong vertical wind shear were all favorable to this weather process．The Doppler radar can properly monitor the developing processe of the hailstone weather．The appearance of＞50 dBZ echo section and cove configuration，convergence region and adverse wind region，increase of VIL value(Vertical Integration of Liquid water)and STI(storm track information)，these all have indication to occurrence of hail weather．