2021年5月10日~12日湖南省邵阳市暴雨、冰雹天气过程分析

Analysis of Rainstorm and Hail Weather Process in Shaoyang City, Hunan Province from 10~12 May, 2021

利用自动站小时降水资料、常规观测资料、欧洲中心细网格和GRAPES-GFS数值模式产品、NCEP和ERA5再分析资料,对2021年5月10日~12日邵阳市暴雨、冰雹天气过程进行分析。结果表明:此次暴雨是在高空槽东移、低空急流、低空切变线共同作用下发生的。白天地面倒槽的发展、地面辐合线对暖区暴雨、冰雹、雷暴大风等天气有一定的指示作用。临近的中尺度模式对于暴雨、大暴雨有指示意义。

The rainstorm and hail weather process in Shaoyang from 10~12 May, 2021 is analyzed by using the hourly precipitation data of automatic stations, conventional observations, the European Center fine grid and the GRAPES-GFS numerical model products, NCEP and ERA5 reanalysis data. The results show that the rainstorm occurred under the joint action of the eastward movement of the high trough, the low-level jet stream and the low-level shear line. The development of surface troughs during the day and the convergence line of the ground have a certain indicative effect on weather conditions such as heavy rain, hail, thunderstorms, and strong winds in warm regions. The adjacent mesoscale model is indicative of rainstorm and heavy rainstorm.