【摘要】 2003年7月29日夜间至30日早晨,朔州市出现了一次范围广、强度大的降水过程。利用天气形势、T213数值预报产品和本站气象要素等资料,对其进行了综合分析。分析表明,高空冷涡携带强冷空气东移南下,副高西北侧的西南气流把南海的暖湿空气不断地向河套地区输送,冷暖空气交汇于河西走廊到河套一带。同时,低层低涡、地面低压的发展触发了强烈的辐合上升运动,上层干冷、下层暖湿的不稳定层结也是这次强降水发生和维持的有利条件。更多还原

【Abstract】 An extensive range and strong precipitation process happened from the night of July 29th 2003 to the morning of 30th in Shuozhou. It was analyzed by use of weather situation,T213 numerical forecast production and station’s weather elements. The result showed that the upper cold vortex went to southeast with strong cold air, southwest air stream on the northwest of subtropical anticyclone continually take the worm damp air to the bend of river area, cold and worm air crossed to the area from The Hexi Corridor to the bend of river.Meanwhile the development of low layer low vortex and ground depression.touch off the fiercely ascend movement.The unstable layer structure with cold dry up and worm humid down was advantageous to take place and maintain the precipitation.更多还原