2009年7月20日山西省南部区域暴雨天气分析

利用常规气象资料以及卫星云图、自动站雨量等非常规气象观测资料,采取天气学诊断分析方法,对2009年7月20日出现在山西省南部的区域性暴雨天气过程进行了分析。结果表明：副热带高压向南摆动是造成此次区域性暴雨过程的天气尺度系统;700hPa和850hPa切变线是此次暴雨发生的主要影响系统;卫星云图能够较好地监测中尺度系统的发展及移向,同时中尺度系统的发展和移向与雨团的移动和自动站的雨量有较好的对应关系。

The Analysis on a Stormy Weather in Southern shanxi on July 20,2009

by using some conventional meteorological data and some unconventional meteorological observation data such as satellite cloud picture and automatic station＇s rainfall,and adopting synoptic diagnosis and analysis,this paper analyzes the synoptic process of regional rainstorm occurring in Southern shanxi on July 20,2009. The results show that：the southwardly swing of the subtropical high is the synoptic scale system causing this regional rainstorm process,the shear line between 700 hPa and 850 hPa is the main influence system for the occurrence of this rainstorm,and the satellite cloud picture can better monitor the development and moving direction of mesoscale system,and at the same time,between the the development and moving direction of mesoscale system and the automatic station＇s rainfall there is a better congruent relationship.