摘要
使用常规天气资料、雷达拼图资料,对2018年5月18日赣东北出现的局地冰雹与较大范围的雷暴大风天气过程进行特征分析,结论表明:强对流天气主要发生在高空低槽前的不稳定区中,具有较好的动力、热力、水汽条件。T-logP探空图上有明显的"喇叭口"特征,V-3θ图600hPa处θsed与θ*呈"一"字型结构,并在200hPa附近有显著"超低温"。局地冰雹在江西webGis雷达拼图上,表现为较大范围(>100km2)的60～65dBz回波中出现65～70dBz回波核,并在一侧具有紧密的强回波梯度。较大范围的雷暴大风天气,发生在自西向东移动的南北走向飑线回波带上,飑线上强中心回波强度可达55dBz以上;飑线前方的对流回波不断并入,使飑线上雷暴大风得以持续、发展,在一定程度上延长了飑线生命史。
Using regular weather data and radar puzzle data,this paper analyses the characteristics of the local hail and the large range thunderstorm gale weather on the May 18,2018 northeast Jiangxi Province,and concludes that the strong convective weather mainly occurs in the unstable area before the high altitude trough,and has better dynamic,thermal and vapor conditions.T-LOGP sounding map on the obvious"Bell"features,V-3θfigure 600 hPaθsed andθ*is"one"font structure,and in the vicinity of 200 hPa has a significant"ultra-low temperature."In the Webgis radar puzzle of Jiangxi,the 65~70 dBz echo nuclei appear in the 60~65 dBz echoes of a large range(>100 km2),and the strong echo gradient is close to one side.A large range of thunderstorms and windy weather,the strong central echo intensity of the squall line can reach more than 55 dBz in the north-south direction from west to east and the return of the Storm line,which is the continuous integration of the convective echoes in front of the squall line,which prolongs the squall line's life history to a certain extent.
作者
郑卡妮
陈鲍发
ZHENG Kani;CHEN Baofa(Leping Meteorological Bureau,333300,Leping,Jiangxi,PRC;Jingdezhen Meteorological Bureau,333000,Jingdezhen,Jiangxi,PRC)
出处
《江西科学》
2019年第1期76-80,共5页
Jiangxi Science
基金
景德镇市科技计划项目(2017NYSF002)
江西省气象局2017年面上项目"赣东北致洪大暴雨的分析与研究"
