2023年6月贵阳机场一次雷雨天气过程诊断分析

Diagnostic Analysis of a Thunderstorm Process at Guiyang Airport in June 2023

摘要: 利用贵阳机场自动观测站数据、常规观测地面资料和高空资料、多普勒雷达资料，对贵阳机场2023年6月5日雷雨天气过程的天气形势、物理量条件以及雷达图像进行诊断分析。结果表明：本次雷雨天气过程具有降水持续时间较长，短时降水强度大等特点。700 hPa和850 hPa上贵州附近有明显切变线和地面辐合线为此次过程提供了触发机制；高层辐散、低层辐合的结构配置提供了良好的动力条件；西南急流和中低层显著的水汽辐合提供了充沛水汽。雷达强回波中心过境时间与强降水发生时段有着良好的对应。

Abstract: Using Guiyang airport automatic observatory data, ground observation data and high-altitude data, Doppler radar data to diagnose and analyze the weather situation, physical quantity conditions and radar images of June 5, 2023 thunderstorm weather process at Guiyang Airport, the results show that this thunderstorm weather process is characterized by a long duration of precipitation and high intensity of short-term precipitation. The significant shear lines on 700 hPa and 850 hPa and surface convergence lines near the Guizhou provided the triggering mechanism for this process. The structural configuration of high-level divergence and low-level convergence provides a good dynamic condition. Abundant water vapor is provided by the Southwest Rapids and significant moisture convergence in the lower and middle levels. The transit time of the radar strong echo center corresponds well with the period of occurrence of heavy precipitation.