2019年“6.11”广西雷暴大风天气成因分析  

Cause analysis of thunderstorm and gale weather in Guangxi on June 11,2019

作　　者：黄嘉浩 汤中明 欧坚莲 Huang Jiahao;Tang Zhongming;Ou Jianlian(Xijiang Airport,Wuzhou Guangxi 543000;Baise Meteorological Bureau,Baise Guangxi 533000;Wuzhou Meteorological Bureau,Wuzhou Guangxi 543002)

机构地区：[1]梧州市西江机场,广西梧州543000 [2]百色市气象局,广西百色533000 [3]梧州市气象局,广西梧州543002

出　　处：《气象研究与应用》2020年第2期75-79,共5页Journal of Meteorological Research and Application

基　　金：梧州市强对流天气的短期潜势预报指标研究(梧气科2016004)。

摘　　要：利用常规气象资料、探空数据、多普勒天气雷达资料等,对2019年6月11日梧州市出现的一次罕见雷暴大风天气过程进行分析。结果表明,此次雷暴大风是在南支小槽东移与切变线相遇时发生的。大气层结不稳定、高温高湿、低层辐合、垂直风切变较大背景下,低层辐合线触发了强对流天气的发生。雷达观测显示,线状对流回波及前部新激发的强回波带前移过程中产生了雷暴大风,径向速度图上近地面出现大于17 m·s^-1大风速区时,对雷暴大风的预报预警有指示意义。Using conventional meteorological data,radiosonde data,and Doppler weather radar data,a rare thunderstorm and gale weather process in Wuzhou on June 11,2019 was analyzed.The results showed that the thunderstorm gale occurred when the south branch trough moved eastward and met the shear line.Under the background of unstable atmospheric junction,high temperature and humidity,low-level convergence and large vertical wind shear,the low-level convergence line triggered the occurrence of strong convective weather.Radar observation showed that thunderstorm gale occurred in the moving forward process of the linear convective echo and the new excited strong echo band in the front.When there was a high wind speed area greater than 17m·s^-1 near the ground on the radial velocity map,it was indicative for the forecast and early warning of thunderstorm strong winds.

关 键 词：雷暴大风 多普勒雷达 边界层辐合线 探空分析 

分 类 号：P458[天文地球—大气科学及气象学]