台风派比安外围龙卷天气分析

Analysis on the Tornado in Outer Periphery of Typhoon Prapiroon

0606号台风派比安于8月3日19:20在电白至阳西之间沿海地区登陆后,8月4日其外围云带引发的一系列威力超强的龙卷风分别袭击了高要金渡、三水白坭镇、清远石角镇、南海大沥等地,并给上述地区造成了严重的灾害。笔者使用天气图资料分析龙卷风形成的天气形势背景,结合散度、涡度、垂直速度、垂直风切变、k指数等物理量及卫星云图、多普勒雷达回波资料分析其环境场和云带、回波的演变过程。

At 19：20 of August 3,typhoon Prapiroon landed on the coast area between Dianbai and Yangxi.On August 4,a series of strong tornadoes caused by the cloud belt of periphery irately attacked places such as Gaoyao Jindu,Sanshui Baini,Qingyuan Shijiao,Nanhai Dali,and have created serious disaster for the above areas.The tornado synoptic situation background was analyzed by the weather map material.Its environment field,cloud belt and echo was analyzed by physical measures such as ivergence,vorticity,vertical velocity,vertical wind shear,kindex and the satellite cloud chart,doppler radar material.