低涡与怀柔暴雨

Low Vortex and Heavy Rain at Huairou County in Beijing

对产生怀柔县暴雨的三类低涡（蒙古低涡、西北涡和西南涡）进行了统计分析。对各类低涡暴雨的个例对比分析发现，三类低涡暴雨有相同的不稳定度和水汽条件，但垂直运动条件则不同，这些为暴雨预报提供了依据。

Three types of low vortex (Mongolia vortex,Northwest vortex and Southwest vortex)producing heavy rain at Huairou County in Beijing are analysed.The results show that there are same unstability and vapour condition in three low vortexs,but vertical motion condition are different.It is helpful to forecasting heavy rain.