秦皇岛市一次冰雹天气过程分析

Analysis of A Hail Weather Process of Qinhuangdao

利用常规气象观测资料、加密自动站资料和多普勒雷达资料,对秦皇岛市2019年5月15日出现的一次冰雹天气过程进行分析。此次过程为典型冷涡影响下的强对流天气,大气层结处于不稳定状态,且不稳定、能量较大,地面冷锋和辐合线触发了此次冰雹天气;前倾形势明显,CAPE为743.2 J/kg,K指数为33.4,SI指数为-3.19。0℃层所在高度为3 576.7 m,-20℃层所在高度为6 316.4 m,有利于冰雹的增长,并且垂直风切变较强,环境条件有利于冰雹等强对流天气的出现。对于冷涡后的强对流天气预报需要精心研讨,多参考一些地方性指标,分析物理量场的变化;同时要注重短临监视,加强对加密观测数据、多普勒雷达的监视,加强临近预报预警。

Used conventional meteorological observation data,encrypted automatic station data and Doppler radar data,to analyze a hail weather process in Qinhuangdao on May 15,2019.This process was a severe convective weather under the typical cold vortex background.The atmospheric stratification was in an unstable state,and the unstable energy was large.The surface cold front and convergence line triggered this hail weather.The forward-tilting situation and strong vertical wind shear were obviously conducive to the occurrence of severe convective weather such as hail.