黑龙江西北气流型冰雹天气成因分析

Analysis of the causes of hailstorms under the Northwest airflow situation in Heilongjiang province

本文对2016年黑龙江省6月发生的2次较为典型的西北气流型冰雹天气过程进行了对比分析。发现两次冰雹天气过程具有相似的天气形势及对流不稳定层结条件。地面均有风的辐合,低层存在露点锋且风垂直切变大,有利于风暴的组织发展,弥补了西北气流形势下动力抬升条件的不足。局地山区和狭管地带的地形抬升作用也对降雹起到了重要的作用。

This paper makes a comparative analysis of the two typical hailstorms which occurred in the weather patterns of the northwest airflow in Heilongjiang province in June 2016.It is found that two hail weather processes have similar weather conditions and unstable stratification conditions. The surface has the convergence of wind,and the the low level has dew-point front and strong wind vertical shear, which are conducive to the organization and development of the storm, and makes up the deficiency of the driving conditions under the northwest airflow situation. The lifting effect of the local mountainous area and the narrow pipe area also plays an important role in the formation of hail.