宜丰和上高县级区域雷暴大风FY2G云图特征分析

Characteristic Analysis of FY2G Cloud Map of Thunderstorm and Gale in Yifeng and Upper Regions

利用FY2G卫星云图资料、地面气象要素、重要天气报和WebGIS雷达拼图资料,对2000-2018年宜丰和上高区域20次(日)雷暴大风天气进行统计、对比、分类分析,结果表明:影响宜丰和上高县级区域的雷暴大风,在FY2G卫星云图上具有3类云图特征,即带状结构云系、团状结构云系和块状结构云系。其中,带状结构云系(7次)有3种演变形态:东北~西南走向的短带云系、MCS中尺度对流系统和南北走向的飑线云带;团状结构云系(7次)有3种演变形态:团状不规则云系、MCC中尺度对流复合体、MCS中尺度对流系统;块状结构云系(6次)有3种演变形态:孤立MCS中尺度对流系统、孤立强单体对流云系、孤立小单体对流云系。雷暴大风常伴随短时强降水出现,有时雷暴大风还会伴随冰雹同时出现。

By using FY2G satellite cloud image data,ground meteorological elements,important weather reports and WebGIS Radar Mosaic data,20 thunderstorms and gale days in Yifeng and upper regions from 2000 to 2018 were analyzed,compared and classified.The results show that there are three types of thunderstorms and gales affecting Yifeng and upper county - level regions,namely banded structured clouds on FY2G satellite cloud images.Systematic,clustered and massive cloud systems.Among them,banded structure cloud system ( 7 times) has three evolution forms: northeast - southwest short - band cloud system,MCS mesoscale convective system and North - South square line cloud belt;clustered structure cloud system ( 7 times) has three evolution forms: clustered irregular cloud system,MCC mesoscale convective complex,MCS mesoscale convective system;massive structure cloud system ( 6 times) has three evolution forms: isolated M.CS mesoscale convective system,isolated strong monomer convective cloud system and isolated small monomer convective cloud system.Thunderstorms and gales are often accompanied by short - term heavy preconditioning Ipitation,and sometimes thunderstorms and gales are accompanied by hail at the same time.