摘要
利用常规天气图、物理量场、卫星云图和雷达回波等资料对2013年5月22日-23日运城强对流天气过程进行诊断分析，结果表明：1．前期能量积聚为此次强对流提供不稳定能量，19日-21日连续3天运城气温明显回升，21日运城有8站最高气温≥37℃；2．中层冷空气入侵触发对流，500hPa有-12℃等温线南压。3．低层强烈的水汽辐合，低涡切变、低层辆合、高层辐散及前倾槽结构均利于强对流发生、发展；4．K指数、SI指数及订正后的CAPE值对强对流天气发生有较好的指示意义。5．中β尺度系统是本次强对流天气形成的直接影响系统。
Using the sounding, surface observation data, Physical quantity field, Satellite image and Radar echo data, The strong convective weather process was diagnosed and results showed that： （1） Early energy accumulation for the wether p analyzed in yuncheng on 22-23rd May 2013,The rovided the convective instability energy, Yuncheng temperatures continued rebounded from 19 May to 21 May, Yuncheng had the highest temperatures of eight stations above 37 degrees Celsius.（2） The cold air of the Middle invaded ,and triggered convection, The minus twelve degree isotherms advanced Southward on 500hPa. （3）Intense moisture convergence of The low, low shear, low-level convergence, top-level divergence and forward Groove structure was conducive to development of the strong convection.（4） K-index, SI-index and revised CAPE values had a good strong convective weather implications.（5） B -scale systems was directly affects the system for the formation of strong convective weather.
出处
《山西气象》
2014年第3期1-5,共5页
Shanxi Meteorological Quarterly
关键词
强对流
切变线
中β尺度
雷达回波
Strong convection
Shear line
B -scale
Radar echo.
