四川宜宾一次暴雨天气过程分析  

Analysis of a Stormy Weather Process in Yibin on September 3, 2021

作　　者：杨芳 YANG Fang(Nanxi District Meteorological Service,Nanxi 644100,China)

机构地区：[1]四川省宜宾市南溪区气象局,南溪644100

出　　处：《高原山地气象研究》2024年第S01期89-92,共4页Plateau and Mountain Meteorology Research

基　　金：宜宾市气象局2023年度科研项目(宜气科研2023-12)。

摘　　要：利用常规观测资料、卫星资料,从大尺度环流形势、热力和不稳定条件等方面,诊断分析了2021年9月3日宜宾市一次暴雨天气过程。结果表明:此次暴雨是在中高纬两槽一脊环流背景和副高稳定少动的环流形势下,由高原低槽东移、冷空气南下入侵、低空急流和低层切变线等诸多条件共同导致的一次天气过程,其中偏南暖湿气流输送的不稳定能量为暴雨的发生提供了所需的能量条件。此次降雨活动,高度场的预报与实况较为一致,预报效果较好。Based on conventional observation data and satellite data,a rainstorm process in Yibin City on September 3,2021 was preliminarily analyzed from the aspects of large-scale circulation situation,thermal and unstable conditions.The analysis shows that this heavy rain was a weather process caused by many conditions such as the eastward movement of the plateau trough,the southward invasion of cold air,the low-level jet and the low-level shear line,which was under the circulation background of two troughs and one ridge in the middle and high latitudes and the stable circulation situation of the subtropical high.The unstable energy transported by the southerly warm and humid air flow provided the necessary energy conditions for the occurrence of the rainstorm.The forecast of the height field was consistent with the actual situation,and the forecast effect was good.

关 键 词：暴雨 强对流 预报 

分 类 号：P458.121.1[天文地球—大气科学及气象学]