The Analysis of a Local Rainstorm Process in Qingyuan

In this paper,we use sounding observation data as well as the FY-2D weather satellite imagery,Doppler weather radar,and other unconventional data,and adopt synoptic diagnosis method to carry out a diagnostic analysis on a local rainstorm appeared in Qingyuan.The results show that:(1) In the course of this local rainstorm,the instable air flow of the subtropical high pressure edge and the air flow upward motion before southern trough are the synoptic scale systems and large-scale circulation background of this local rainstorm;(2) Before the occurrence of rainstorm,the instability energy in the atmosphere is constantly accumulating in order to create a favorable environmental condition for the formation of mesoscale system;(3) Terrain and precipitation are closely related,small-scale topography enhances the air flow upward motion,resulting in the continuous generation and development of local convective clouds.