海东地区一次大到暴雨天气过程分析

Analysis of a Heavy Rain Weather Process in Haidong Area

利用Micaps常规资料,从降水实况、天气形势、物理量特征、卫星雷达等方面分析了2020年7月24日午后发生的一次大雨过程及局地暴雨天气成因,结果表明:降水前期海东地区一直受副高边缘西南气流控制,暖湿条件良好,然后中东高压东伸与副高打通形成高压带,新疆槽东移至青海东北部与南部四川西部低涡形成类似于北槽南涡形势,形成此次海东地区降水。

Using Micaps conventional data,this paper analyzes the causes of a heavy rain and local rainstorm in the afternoon of July 24,2020 from the actual precipitation,weather situation,physical quantity characteristics and satellite radar.The results show that Haidong area has been controlled by the southwest air flow at the edge of the subtropical high in the early stage of precipitation,with good warm and wet conditions.Then the Middle East High extends eastward and forms a high pressure belt with the subtropical high,The Xinjiang trough moved eastward to the northeast of Qinghai and formed a low vortex in the west of Sichuan in the south,which is similar to the situation of the South vortex in the North trough,resulting in the precipitation in Haidong area.