攀西地区南部一次MCC引发暴雨过程的分析

利用地面气象观测资料、雷达卫星资料和FNL再分析资料，对2018年6月22日攀西地区南部的一次暴雨天气过程进行分析。结果表明:本次暴雨天气过程由MCC导致，低层的辐合区和高层的南亚高压脊线是产生暴雨的主要影响天气系统；MCC发生于弱环境风场条件下的高能高温高湿环境中，但对垂直风切变的要求较低；MCC生成发展区域中低层温度和露点较周边区域高，MCC区域大气表现出明显的低层辐合，高层辐散，辐合(散)成熟阶段较发展阶段强。

The Analysis of a Rainstorm Induced by MCC in South Panxi Area

Using surface meteorological observation data,regional automatic meteorological station observation data,radar and satellite data and NCEP1°×1° 6-hour reanalysis data to analysis the rainstorm weather process in the southern part of Panxi region on June 22,2018. The results show that the rainstorm weather process is caused by MCC. The low-level convergence zone and the high-level South Asia high ridge axis are the major influence systems that cause heavy precipitation. The MCC occurred in high energy,high temperature and high humidity environment under weak environment wind field,but the requirement of vertical wind shear is low. The temperature and dew point in the middle and lower layers of MCC Generating and developing regions are higher than surrounding areas,and the positive temperature in the development stage is more significant than maturity stage. The atmosphere around MCC region shows obvious convergence,high-level divergence and strong upward movement,convergence (divergence) and upward movement maturity stage are stronger than development stage.