阳泉市“7·21”强降水天气诊断分析

Analysis on the Cause of “7·21” Heavy Rain in Yangquan

利用常规观测资料、地面自动气象站资料、卫星和多普勒雷达等,分析了2021年7月21—22日出现在阳泉市的一次强降水天气过程。结果表明:该降水天气过程与冷涡和台风相关,副高异常偏北,发生在上冷下暖的环境配置下,东南季风输送水汽充足,对流在地面露点锋和辐合线附近触发。北京RMAPS 3公里模式对暴雨的位置和量级有较好的指示。

Based on the observation data, ground automatic weather station data,satellite data and Doppler radar,analyze a heavy rain in Yangquan City from July 21 to 22, 2021.The results show that the heavy rain is related to the cold vortex and typhoon.The western pacific subtropical high anomalous northward.It occurs the upper cold and lower warm environment configuration.The southeast monsoon transports abundant water to the inland,and the convection is triggered close to the dew-point front and convergence line on the ground.The RMAPS-3 km weather forecasting model of Beijing has a good indication for the location and magnitude of the rainstorm.