2014.3.28梅州一次冰雹过程分析

Analysis of a Hail Process over Meizhou City on March 28,2014

利用天气图、多普勒雷达图等资料,运用天气学原理等方法,对2014年3月28日梅州的一次冰雹过程分析后得出:冰雹过程是在500 h Pa南支槽前强西南气流、850 h Pa西南急流、925 h Pa和地面辐合的系统下产生的;中层干冷,低层暖湿的大气层结及低层明显的垂直风切变、适宜的0℃层均有利于冰雹的发生;冰雹的移动方向是西南—东北,最强回波达到65 d BZ以上,但维持时间较短;具有钩状回波和弱回波特征,有明显的逆风区且都位于回波移动的右侧;垂直液体水含量(VIL)值在雹云发展成熟时维持在40 kg/m^2以上,最大时能达到50 kg/m^2;回波顶高度维持在11 km以上,最大时达到14 km。

A hail process over Meizhou City on March 28, 2014 is analyzed by using synoptic charts, Doppler radar maps and other data. The results show that the hail process oeeurres under strong southwest airflow before the southern trough in 500hPa, southwest jet in 850hPa, convergence in 925hPa and the ground; Dry and cold in the middle, moist atmosphere and lower apparent vertical wind shear, and appropriate 0℃ layer are conducive to the occurrence of hail; The movement of hail is from northeast to southwest, and the strongest echo reached more than 60dBZ, while maintaining for a short time ; The echo, located right hand of the echo, has hooked echo and weak echo characteristics, also with obvious upwind; Vertical liquid water content value（VIL） is above 40 kg/m2 before the mature of a hailstorm and the heaviest can reached 50 kg/m2 ; Echo top height remained above 11 km, and the heaviest is 14 km.