【摘要】 利用2009年11月湖南发生强对流天气的探空资料和多普勒天气雷达资料进行中尺度分析,结果表明:发生在深秋季节的强对流天气过程的触发条件是南支槽、中低层切变以及高低空急流;CAPE值、CIN值、K指数、SI指数和500 h Pa的变高对强对流天气预报有较好的指示意义;上午的强对流天气其雷达回波表现为带状回波特征,午后的强对流天气主要表现为超级单体。更多还原

【Abstract】 A mesoscale analysis was carried out based on radiosonde and Doppler data for a severe convective weather that happened in November 2009 in Hunan.The result is shown as follows.This late-autumn severe convective weather was triggered by a southern branch of the westerlies,shears at the middle and low levels and jet streams at the upper and low levels.The values of CAPE and CIN,K index,SI index and500-h Pa isallohypses are good indicators of the weather.For the radar echoes,the weather is of a stripe in the morning but of a super cell after midday.更多还原