桂林市雷雨大风特征及天气形势分析

Guilin Thunderstorm and Strong Wind Characteristics and Weather Situation Analysis

通过对桂林市13个气象观测站2004～2008年雷雨大风资料进行普查和统计,研究了桂林市雷雨大风天气的时空分布和变化特征。分析结果表明,桂林雷雨大风主要出现在春夏季节(2～8月),其中以5月最多,其次为3月,而1、9、10、11、12月这5个月基本没有雷雨大风出现。从空间分布来看,雷雨大风有3个多发区,一是"湘桂走廊"入口的全州、兴安县,二是在桂林、临桂附近的中部区,三是以阳朔、荔蒲县为代表的南部区。同时分析了33个雷雨大风个例的天气成因,得到了桂林产生雷雨大风的3种天气形势。这些结论为进一步研究桂林的强对流天气提供了重要依据。

Through study on thunderstorm and strong wind data from 13 meteorological stations in Guilin from 2004 to 2008,the spatial distribution and variation characteristics were researched.The results showed that thunderstorm and strong wind mainly occurr in spring and summer（Feb.-Aug.）,among which,May comes first,and Mar.takes the second place.In Jan.,Sep.,Oct.,Nov.,and Dec.,there are almost no thunderstorm and strong wind.Seeing from spatial distribution,there are three prone areas,first is ＂Xianggui Corridor＂ entrance Quanzhou and Xingan;second is central district including Guilin and its neighboring land;third is southern district represented by Yangshuo and Jiapu County.At the same time,causes about 33 cases of thunderstorm and strong wind wether were analyzed,three weather prognostics were obtained.These conclusions will provide a significant basis for further study on severe convective weather in Guilin.