一次强风暴过程的雷达回波特征分析

目的]分析2007年7月23日发生在长沙市境内的一次冰雹天气过程,为冰雹大风的短时临近预报提供基础。方法]系统地分析雷暴和强对流天气产生的环境条件,并运用新一代天气雷达产品资料,揭示强风暴在不同的雷达产品中的一些特征。结果]风暴低层前侧有入流缺口和有界弱回波区（BWER）、高层具有强回波悬垂结构、强回波区有中气旋（M）、风暴发展阶段垂直液态含水量VIL出现跃增。结论]新一代雷达对超级单体风暴类天气的监测和分析更为精细。

Analysis on Characteristics of Doppler Weather Radar Echoes for a Severe Storm Event

Objective]The research aimed to study a hailstorm event taken place in Changsha City,the capital of Hunan Province,on July 23,2007,and to provide basis for the short-term weather forecast of hail with gale weather.Method]The study systematically analyzed the environmental condition for the outbreak of a severe thunderstorm and the severe convection weather event with Doppler weather radar echoes.And some typical characteristics of the event were investigated with the products of the new generation Doppler weather radar.Result]The results showed that the inflow notch and the boundary of weak echo region(BWER) ahead the low level of the storm,the overhang echoes in the high level of the storm,the mesocyclone in the strong echoes,and the sharp increase of the vertical integrated liquid during the development of the storm.Conclusion]New generation Doppler weather radar can analyze more carefully on supercell storm weather.