湖北省一次区域性暴雨过程的综合分析

采用T213产品中的物理量资料和天气图、卫星云图和雷达回波资料,对2007年7月1日江汉平原和鄂东的大暴雨天气过程的环流背景及其动力、热力、水汽条件进行了综合分析。结果表明：乌山低槽分裂出的冷空气东移,在华北东北部形成气旋波,其后部冷空气南下与副热带高压北上携带的暖湿气流相对峙所形成的湿度锋锋生和低层低涡、切变线是造成本次大暴雨天气过程的主要天气系统。有利强降水的各物理量场配合是降水云团迅速发展加强的有利条件。有能量锋区配合的θse高能区和K指数≥39℃的区域是有利大暴雨产生的区域。

The Integrated Analysis of One Process of Torrential Rain in Hubei Province

Based on the data of physical quantity product of T213, weather chart, satellite image and the radar echo, the circulation backgrounds , dynamic, thermal and water vapor conditions of the process occurring in Jianghan Plain and eastern Hubei Province on July 1 of year 2007 are analyzed. The result shows that, cold air from Ural mountain＇s groove moved to east, then formed cyclone in the northeast of north China, whose tail and warm-wet air brought by subtropical anticyclone formed the humidity frontogenesis. Humidity frontogenesis, cyclonic vortex and shear-line are the main weather systems led to the rainstorm. Cooperation of all kinds of physical quantity field is the good external condition for precipitation cloud rapid developing and strengthening. The areas of θse high energy cooperated with energy frontal zone and K index≥ 39℃ are the areas which are propitious to the heavy rainstorm.