2013年广西一次前汛期暴雨过程分析

利用地面观测资料、探空资料和卫星观测资料对2013年4月29日至5月1日广西东部地区出现的一次暴雨天气过程进行分析,结果表明：（1）本次强降雨过程前期具有典型的暖区暴雨天气过程,主要受高原槽、低层急流系统影响,低层风向辐合高层辐散的配置触发了暴雨天气的产生,后期冷空气南下影响,触发强对流云团发展,造成强降雨天气的持续;（2）过程期间涡度场、散度场低层辐合高层辐散配置较好,水汽辐合上升强烈;（3）中尺度雨团在广西东部连续的生成并维持,造成桂东地区大范围的暴雨天气.

Analysis of a Heavy Rain Process Before the Flood Season of Guangxi in 2013

Based on the ground observation data , sounding data and satellite observation data, the process of a heavy rain appearing in the east of Guangxi on April 29 to May 1 of 2013 was analyzed, the results showed that： （1） The early stage of heavy rainfall process had typical heavy rain process in warm area and affected by the plateau trough, low-level jet stream, heavy rainfall was triggered by low-level wind direction convergence and high-level divergence, then the continuous heavy rainfall weather was caused by southward cold air. （2） Vorticity field and divergence field configured well in low-level convergence and the high-level divergence, the vapor convergence was rising strongly. （3） The mesoscale rain cluster were continuous to generate and maintain to cause a wide range of heavy rain in the east of Guangxi.