Comprehensive Analysis on Three Hailstone Episodes at the Shihezi Area in Xinjiang

The three selected hailstone episodes occurred in spring at the edge of desert in shihezi area in Xinjiang were analyzed comprehensively using the conventional observation data and radar echo data with respects to weather situation,physical vector fields and evolution features of radar echoes.The results showed that the three hailing processes occurred under the typical upper air trough hail circulation.Favorable hydrometer conditions,convective instability conditions and strong vertical wind shear promoted the formation and development of strong convection synoptic processes.The research showed that Doppler radar can properly monitor and measure the development and evolution processes of the mesoscale weather systems;the variation of echo intensity,echo top height,wind speed and adverse wind region,VIL(Vertical Integration of Liquid water)and STI(storm track information)have preferable application value for forecasting hail and reducing losses from the disaster in the future.