Abstract: It is crucial to well forecast severe convective weather like hail and provide better service during summer in Fuxin city,Liaoning province. Two severe hailstorms in Fuxin were compared by using conventional observation datas and doppler radar datas. The result showed that they occurred abruply,lasted longly. And the coupled upper and lower jet flows,energy condition,the vertical wind shear and the height of zero temperature conduced more to the occurrence of the hail event. The results of comparation by using doppler radar data showed that,the process on June,29th was a strong squall line process,while the process on July,20th was a typical supper-cell process. Two hail process which storm reflectivity was larger than 50 dbz,while the largest was 65 dbz,and there were an adverse wind area,as well as lower level convergence and upper level divergence. The vertically integrated liquid （VIL） value before the hail falling all had a sudden process,and the value was larger than 40 kg/m²,which had a significant indicating function on hails of monitoting and waring as well as forcassting.

Key words: hail, jet low, doppler weather radar, super cell, squall line, Fuxin city