Utilizing upperair, surface data and dual polarization weather radar data, a hailstorm and shorttime severe rainfall weather occurred in the southeast coast of Fujian in 21-22 December 2016 is analyzed. The results show that the hailstorm in the afternoon 21 December is induced by the southwest warm advection forcing sector severe convection. The shorttime severe rainfall at night is the baroclinic frontogenesis severe convection. We analyze the hail phase state evolution based on the dual polarization weather radar products. The obvious hail features (ZDR≤0, echo intensity ≥55 dBz) appear around 0℃ level height firstly, then develop upward and downward. The TBSS (threebody scattering spike) occurs at high level. But because the level of the wetbulb temperature zero (WBZ) is the same as the level of drybulb temperature zero (DBZ), the melting level of hail is thick. In the afternoon the surface temperature is above 20℃. During the falling process of hails, the values of differential reflectivity (ZDR) and differential phase shift (KDP) change from negative to positive, which shows that the hails melt into big raindrops or outsourcing water film hails. The value ZDR changes from negative extreme to positive extreme and correlation coefficient (CC) is smaller than 0.7 where the area TBSS of echo intensity is 15-20 dBz, which are the characteristics of nonmeteorological echoes. ZDR and KDP of shorttime severe rainfall increase with the intensity of reflectivity, and the value of CC is above 0.97, which indicate that a large amount of relatively largesized raindrops are the main cause for this shorttime severe rainfall.