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中文摘要: 对2003年8月28～29日宁陕特大暴雨过程诊断分析结果表明:特大暴雨发生在低层辐合、高层辐合，不利于强对流发展的弱对流环境中。低层850～700hPa低涡倒槽为特大暴雨提供了辐合上升运动和充沛的水汽条件。850hPa几股来自不同方向、性质不同的气流相汇在宁陕上空，强水汽辐合是特大暴雨形成的主要原因。
中文关键词: 弱对流，特大暴雨，低涡倒槽，强水汽辐合
Abstract:A local heavy rainfall event in Ningshan, Shaanxi Province on 28-29 August 2003 is diagnosed. The results show that the event occurred in a weak convection condition with convergence at high and low-level against strong convection. Vortex and inverted trough at 850hPa to 700hPa supplied plentiful vapor and powerful updraft. Several air currents from different way with different characters encountered in Ningshan, strong vapor convergence is a main factor of this event.
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引用文本：
刘勇,王川,2005.一次弱对流引发局地特大暴雨天气的诊断分析[J].气象,31(8):14-18.
,2005.A Diagnostic Analysis of a Local Heavy Rainfall Event in Weak Convection Condition[J].Meteor Mon,31(8):14-18.
刘勇,王川,2005.一次弱对流引发局地特大暴雨天气的诊断分析[J].气象,31(8):14-18.
,2005.A Diagnostic Analysis of a Local Heavy Rainfall Event in Weak Convection Condition[J].Meteor Mon,31(8):14-18.