【Key words】 local torrential rain； mesocyclone； weak ambient field； forecast difficulties；
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永嘉县一次局地暴雨过程的雷达特征分析_731苗木网 关键词 局地暴雨；雷达回波；特征； 浙江 永嘉 [gap=727]Key words local rainstorm；radar echoes；characteristics；Yongjia Zhejiang
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局地大暴雨 local heavy rain
In the August 4,2009 night,there was a local torrential rain in Zhengzhou. The duration of the rainstorm was shorter with greater intensity.
2009年8月4日夜间,郑州市区发生了一次局地暴雨天气。
参考来源 - 一次弱环境场下的郑州局地暴雨预报难点分析·2,447,543篇论文数据，部分数据来源于NoteExpress
另外，单站要素和本地地形是预报局地暴雨的重要参考因素。
In addition, local meteorological factors and local topography could be taken for factors of the reference to forecast local heavy rainfall.
冰雹、雷雨大风这类强对流天气的雷达回波移动速度快，而局地暴雨的雷达回波移动速度缓慢。
Comparing with local heavy rain, the movement of radar echoes of hailstorms and thunderstorms is rapid.
在地质灾害大规模发生后，诱发新的地质灾害雨量阈值提高。局地暴雨型降雨诱发的地质灾害往往集中发生在出现局地暴雨的当日当地。
But for inducing new hazards, it needs larger rainfall after hazards occurred. Geo-hazards induced by regional rainstorm often occur in the day and space as same as the rainfall.
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