2010年5月29—30日山东省强对流天气过程分析

Analysis of a strong convection weather process in Shandong on may 29-30,2010

文章利用常规气象观测资料、雷达产品和卫星云图等对2010年5月29—30日在山东省发生的强对流天气过程进行分析。结果表明:(1)此次强对流天气主要是受冷涡横槽影响。(2)高空西北气流、低空西南气流、高层干冷、低层暖湿和略有前倾槽的结构是此次强对流天气产生的必要条件。(3)沙氏指数、垂直风切变、850h Pa与500h Pa之间温度差和垂直速度等物理量指标能较好地反映此次强对流天气的发生和移动方向。(4)从雷达回波、云图中可以看出,在横槽的前部经常有小的对流云团生成。(5)前期的温度较高、地形以及城市的热效应也是此次强对流天气发生的原因之一。

A strong convective weather process occurred in May 2010 from 29 to 30 in Shandong Province, were analyzed by using conventional observations, radar and satellite images etc data. The results showed that＇（l） The strong convective weather was mainly affected by the cold vortex transverse grooves.（2） Northwest high airflow, low-level southwest airflow, high-level dry and cold, low- level warm wet, and slightly forward grooves structure, easy Io produced strong convective weather.（3） Some physical indexes such as showaher index and vertical wind shear and temperature difference between 850hPa and 500hPa, vertical velocity and so on can well reflect the strong convective weather occurence and the direction of movement.（4） In the front of the transverse grooves often have a little convection clouds generated can be seen from the radar echoes and satellite images.（5）Early high temperature, thermal effects and the city＇s topography is one of the reasons of the strong convective weather occur.