十堰一次强对流天气雷达回波特征  

Characteristic of Radar Echo for a Severe Convective Weather in Shiyan, Hubei Province

作　　者：舒防国 吴涛[1] 蓝天飞[1] 徐远波 文强[1] 

机构地区：[1]湖北省十堰市气象局,442000

出　　处：《气象》2005年第12期45-50,F0003,共7页Meteorological Monthly

摘　　要：利用十堰714C天气雷达回波资料,结合其它天气资料,分析了2004年7月6日发生在十堰境内的强对流天气过程。结果表明,这次强对流天气是在有利的大尺度天气形势下产生的,局地环境CAPE指数大,水平风的垂直切变较强。强降雹由多单体强风暴造成,回波强度强,高度较高,顶部有旁瓣假回波,低层存在弱回波区 (WER)。雹云移动明显右偏于高空风,属右移风暴,以右后侧和右前侧传播方式发展。强降雹由后一种传播方式造成,初始回波从半空生成,云顶高度较高,强中心位于云体中上层。By using the 714C radar echo data in Shiyan and other weather data, a severe convective weather event in Shiyan on 6, July 2004 is analyzed. The result shows that the severe convective storm occurred under the advantageous large scale weather conditions, with local large CAPE index and strong vertical shear of horizontal wind. Severe hail is caused by multicell severe storm. It has the intensive radar echo, high cloud top, affectation echo on the cloud top caused by radar sidelobe and weak echo region in the lower layer. Hail cloud moves in the right side of the high level wind with right-behind or right-forward propagation. Severe hail is caused by the second propagation, the original echo occurs in the high layer. The cloud top is high and the center of echo locates in the high and middle layer of cloud.

关 键 词：强对流天气 雷达回波 弱回波区 右移风暴 

分 类 号：P448[天文地球—大气科学及气象学] P458.121.1