一次中尺度强降水天气过程分析

Analysis of a Mesoscale Heavy Rain Process

利用常规观测资料、卫星云图、自动站气象观测资料和多普勒雷达等资料,对2011年6月16日玉林市南部一次中尺度强降水过程进行天气动力学和中尺度分析,结果表明:这次暴雨是在有利的大尺度环流背景下,通过中尺度系统激发而产生的。高空低槽和低空切变辐合是强降水产生的前提条件,中尺度对流云团强烈发展是强降水产生的直接原因;分析红外云图的TBB、多普勒雷达反射率和基本速度、地形条件等方面,都很好地阐述了本次强降水的暴雨中心落区。

By using the conventional observational data, satellite cloud pictures, AWS data and Doppler radar data, a weather dynamics and mesoscale analysis for a heavy rain process occurred on june 16, 2011 in southern Yulin was made. It shows that this process is stimulated by mesoscale system under the favorable large-scale circulation, low slots and low shear convergence was the preconditions of rainfall, the mesoscale convective cloud cluster development is strong rainfall produce direct cause. Moreover, the center of this heavy rain is well described by TBB, Doppler radar reflectivity and base speed, terrain condition.