2023年4月3—4日武宁暴雨天气过程分析  

Analysis of the weather process of rainstorm in Wuning on April 3 to 4,2023

作　　者：万红燕 Wan Hongyan(Wuning County Meteorological Bureau,Wuning 334000)

机构地区：[1]武宁县气象局,武宁334000

出　　处：《气象水文海洋仪器》2024年第6期85-88,共4页Meteorological,Hydrological and Marine Instruments

基　　金：九江市科技计划项目“武宁县地质灾害气象预报预警研究分析”(S2021ZDYFN213)资助。

摘　　要：为了监测预警武宁暴雨和短时强降水天气,文章利用常规天气图、地面气象数据、雷达拼图等资料,采用天气学、雷达气象学等原理和分析方法,对2023-04-03—2023-04-04武宁暴雨天气过程进行分析。结果表明:武宁受高空槽东移、低层西南急流、切变线、边界层≥16 m/s超低空急流和地面西南倒槽发展旺盛等多尺度天气系统的影响;700 hPa、850 hPa和925 hPa,比湿大值区逐渐北抬,武宁地区比湿达12 g·kg^(-1),位于水汽大值区;对流有效位能达421.6 J·kg^(-1),K指数为37℃,沙氏指数为-2℃,层结不稳定,上干下湿,有利于武宁地区暴雨和短时强降水天气的发生;与切变线相伴随的西南—东北走向的带状回波,整体朝东南方向移动,单体沿着500 hPa高空风向东北方向移动;回波带上强单体达到45~55 dBZ,致使大洞乡出现34.4 mm/h短时强降水和石门楼中村出现41.7 mm/h短时强降水。希望研究结果能为武宁县暴雨和短时强降水的预警预报提供借鉴。In order to monitor and warn rainstorm and short-time heavy precipitation in Wuning,the article analyzes the weather process of rainstorm from April 3,2023 to April 4,2023 in Wuning by using the data of conventional weather map,ground meteorological data,radar mosaic,etc.,and the principles and analysis methods of synoptic science,radar meteorology,etc.The results indicate that Wuning is influenced by multi-scale weather systems such as the eastward movement of the high-altitude trough,low-level southwest jet stream,shear line,boundary layer super low altitude jet stream≥16 m/s,and the vigorous development of the surface southwest trough.At 700 hPa,850 hPa,and 925 hPa,the area with high specific humidity gradually shifts northward,and the specific humidity in the Wuning area reaches 12 g·kg^(-1),located in the area with high water vapor values.The convective effective potential energy reaches 421.6 J·kg^(-1),the K index is 37℃,the Sabouraud index is-2℃,the stratification is unstable,the upper is dry and the lower is wet,which is conducive to the occurrence of rainstorm and short-time heavy rainfall in Wuning area.The southwest northeast band echo accompanied by the shear line moves in a southeast direction as a whole,with individual units moving in a northeast direction along the 500 hPa high-altitude wind direction.The strong single element on the echo band reached 45 dBZ to 55 dBZ,resulting in a short-term heavy rainfall of 34.4 mm/h in Dadong Township and 41.7 mm/h in Zhongcun,Shimenlou.It is hoped that the research results can provide reference for early warning and forecasting of rainstorm and short-term heavy precipitation in Wuning County.

关 键 词：武宁暴雨 短时强降水 天气特征 回波特征 

分 类 号：P458.3[天文地球—大气科学及气象学]