Case Study of a Severe Mesoscale Convective System in Central Arizona
Case Study of a Severe Mesoscale Convective System in Central Arizona
复制标题
亚利桑那州中部强中尺度对流系统案例研究
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
K. Howard
中科院分区：
文献类型：
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作者：
D. McCollum;R. Maddox;K. Howard
摘要1990年7月23-24日傍晚和清晨，一个中尺度对流系统（MCS）在亚利桑那州中部上空发展，并产生了大范围的暴雨、强风，并对凤凰城市区北方的建筑物、车辆、电线杆和树木造成了破坏。虽然国家气象局和国家强风暴实验室的预报员在1990年西南地区季风项目（SWAMP）中共同工作，并没有预料到雷暴的发展，但亚利桑那州中部在当地标准时间0300至0500之间发布了严重的雷暴和山洪警报。本研究探讨的前兆和支持环境的中尺度对流系统，利用常规天气资料和特殊观测收集在SWAMP。7月23日晚至24日清晨，低层西南气流发展出来，并将亚利桑那州西南部上空的水汽平流穿过亚利桑那州中南部进入山麓丘陵地带，然后进入热带低气压区。
Abstract A mesoscale convective system (MCS) developed over central Arizona during the late evening and early morning of 23–24 July 1990 and produced widespread heavy rain, strong winds, and damage to buildings, vehicles, power poles, and trees across northern sections of the Phoenix metropolitan area. Although forecasters from both the National Weather Service and National Severe Storms Laboratory, working together in the 1990 SouthWest Area Monsoon Project (SWAMP), did not expect thunderstorms to develop, severe thunderstorm and flash flood warnings were issued for central Arizona between 0300 and 0500 local standard time. This study examines the precursor and supportive environment of the mesoscale convective system, drawing upon routine synoptic data and special observations gathered during SWAMP. During the evening of 23 July and the early morning of 24 July, low-level southwesterly flow developed and advected moisture present over southwest Arizona across south-central Arizona into the foothills and...