川西高原南侧对流云团影响丽江市暴雨天气的研究分析

Research and Analysis of Convective Clouds on the South Side of the West Sichuan Plateau Affecting the Rainstorm Weather in Lijiang City

摘要: 每年的主汛期，常常会在川西高原西南侧理塘到稻城一带形成中尺度对流云团，特别是在傍晚到夜间，有时候会从永宁附近分裂西南移动影响丽江区域产生强对流等大雨或暴雨灾害性天气，有时候却又从宁蒗东边木里及盐源一带擦边而过，对丽江根本没有影响。针对这一现象，从天气系统、冷空气、地形等各原因分析形成原理，何种情况对丽江区域有影响，何种时候又对丽江区域没有影响，有针对性的进行监测预报、预警，并建立灾害监测预报预警指标，对此类天气现象有理可寻。

Abstract: During the main flood season every year, mesoscale convective clouds are often formed from Litang to Daocheng on the southwest side of the western Sichuan Plateau, especially from evening to night. Sometimes it split from the southwest of Yongning and affect the Lijiang area to produce heavy rain or heavy rainstorms, and disaster weather from the east of Ninglang, Muli and Yanyuan passed by and had no impact on Lijiang at all. In view of this phenomenon, from the analysis of the formation principle of weather system, cold air, terrain and other reasons, what kind of situation has an impact on the Lijiang region, and when it does not affect the Lijiang region, carry out targeted monitoring and forecasting, early warning, and establish disaster monitoring and forecasting and early warning indicators, which is reasonable for such weather phenomena.