2019年3月21日江西省强对流过程分析  

Analysis of Strong Weather Process in Jiangxi Provinceon March 21,2019

作　　者：李健 马尚芹 LI Jian;MA Shangqin(Xinyu Meteorological Bureau,338025,Xinyu,Jiangxi,PRC)

机构地区：[1]新余市气象局,江西新余338025

出　　处：《江西科学》2021年第5期915-918,共4页Jiangxi Science

摘　　要：为总结江西强对流天气特点及预报指标,应用常规气象资料、江西雷达回波拼图资料和宜春风廓线雷达产品分析了2019年3月21日赣北出现的一次强对流天气过程。结果表明:地面暖区叠加辐合区,低槽与中低层急流配合,冷空气南下,有利于强对流天气产生发展。强的垂直风切变,“上干下湿”的喇叭口结构,适当的0℃层和-20℃层高度,有利于强风雹天气生成。通过风廓线雷达风场计算的本地螺旋度表明,螺旋度峰值与冰雹出现时间对应较好,且提前于短时强降水出现。结论对于冰雹等强对流天气的预报、服务有明显参考价值。In order to summarize the characteristics and forecast index of strong convective weather in Jiangxi Province,we analyze the strong convective weather process in northern Jiangxi on March 21,2019 by using formal meteorological data,Jiangxi radar echo data and Yichun VWP products.The results show that the superposition of wind convergence area and low trough,the cooperation of middle level supercritical flow,the eastward movement of high tropical depression trough and the southward movement of cold air brought by the active shortwave trough are conducive to the generation and development of strong weather.Strong SHR,upper and lower wet bell mouth shape,proper 0℃and-20℃height are favorable for strong hail weather formation.The local SRH calculated by VWP products show that the SRH peak and occurrence time of hail corresponding well,ahead of the time of short-term heavy rainfall.The conclusion has obvious reference value for the forecast and service of strong convective weather such as hail.

关 键 词：强对流天气 物理量 螺旋度 冰雹预报 

分 类 号：P468[天文地球—大气科学及气象学]