湖北保康两次冰雹天气过程的综合分析

利用MICAPS常规资料、TWR01雷达资料及十堰多普勒雷达观测资料,结合地面降雹的实况报告,对2009年6月6日和8月26日发生在保康县的两次冰雹天气过程的天气背景、雷达资料进行了分析。结果表明,高空冷槽、中低层切变线是主要的影响系统。6月6日冰雹由强单体雹云产生,雹云回波具有超级单体回波特点。雷达初始回波高,雹云发展速度快;强中心呈纺锤状,中低层有弱回波区,降雹前垂直液态水含量有明显的变化。8月26日过程发生在副高内部型环流形势下,由合并加强后的雹云产生降雹。

A comprehensive analysis of two hail processes in Baokang area of Hubei Province

Using MICAPS routine data,TWR01 radar data and the observation echo data of the Doppler radar in Shiyan,combined with hail reports on the ground,this paper analyzed the weather background and radar data of two hailstorm processes in Baokang on 6 June and 26 August 2009.The results showed that upper cold chamfer trough and low shear line were the main impact systems.The hail on 6 June was caused by strong cell hail cloud and the hail cloud echo presented supercell echo characteristics.The initial radar echo was high and the hail cloud developed fast.The strong center was in the shape of a spindle.Low middle layer have WER(weak echo region);vertically integrated liquid water values before the hail showed obvious responses.The hailstorm on 26 August occurred in the subtropical high internal circulation situation and was generated by the merged and strengthened hail clouds.