By using the Doppler radar echo about Base Reflectivity ( R ), Storm Relative Vel Map ( SRM ), Vert Integrated Liquid ( VIL ) etc, a severe hail and wind weather process which occured in the south of North China on June 20,2004 is analyzed. 运用多普勒雷达的基本反射率(R)、风暴相对径向速度(SRM)、垂直积分液态含水量(VIL)等产品,分析了2004年6月20日华北南部罕见的冰雹大风天气过程。