2013年夏季驻马店市一次强对流天气过程分析

利用天气图分析方法，通过MICAPS、自动站资料和多普勒雷达资料，对2013年8月1日驻马店的强天气过程进行分析。结果表明：该次强降水过程是在低槽东移、副高边缘的形势下，由中低层切变线、低空急流、地面横切、地面风场切变共同作用影响。强对流天气发生时段低层水汽辐合跃增，配合，在强对流区上空建立深厚的湿层。过程前期处在副高边缘，这为强降水的发生积聚了大量不稳定的能量。同时大的CAPE值和 K指数，也体现出较强的不稳定性。

Analysis of a Strong Convective Weather Process in Zhumadian in the Summer of 2013

According to the method of weather map analysis, the strong convective weather process on August 1, 2013 was analyzed by using MI-CAPS, automatic station data and doppler radar data .It was found that the strong process was influenced by the lower shear line , the low level jet, the ground transverse shear line and the ground wind shear under the situation of low trough eastward located in the edge of subtropical anti-cyclone.Lower water vapor convergence increased abruptly when the strong convective weather occurred , resulting deep layers of wet over the strong convection zone. It was at the edge of subtropical high in the early stage of the process , which accumulated a lot of unstable energy for the heavy rain.In addition, big CAPE value and index K also reflected the strong instability.