利用常规观测、 地面和高空加密、 红外卫星TBB、 多普勒雷达反射率和NCEP再分析等资料， 对2010年7月8-14日长江中游地区持续性暴雨过程进行了分析。结果表明, 副热带高压脊线稳定地维持在23°-24°N之间, 500 hPa贝加尔湖西部大槽不断有小波动向中纬度地区东传, 冷暖气流在长江中游地区交汇和青藏高原东侧东传的低值系统为暴雨的发生和持续提供了有利的环境条件。梅雨期南风活动呈现出明显的日变化， 使得降水也有周期性和日变化特征。梅雨期间有多个中尺度对流系统MCSs活动， 对应地面风场有中尺度辐合线、 中尺度涡旋环流及气流汇合中心的辐合区。强降水发生前， 大气层结表现为位势不稳定， 为降水的发生积累不稳定能量； 临近强降水发生时， 大气层结表现为深厚的湿中性层结； 在降水即将结束时， 大气层结转为弱稳定， 空气柱水汽减少\, 变干， 暴雨期间大气层结的结构特征对暴雨业务预报具有一定的指示意义。持续性暴雨过程中对流层有明显的锋区， 锋前上升运动有利于中尺度对流系统的发生、 发展； 锋区附近的锋生作用与强降水密切相关， 锋生函数计算结果表明， 水平形变对锋生作用的贡献最大。

A continuous  rainstorm in the middle reaches of the Yangtze River during 8 to 14 July, 2010 is analyzed using the conventional data, intensive surface and radiosonde observation data, the Black Body Temperature  (TBB) data from infrared satellite, radar echo data and NCEP reanalysis data. The results show that the subtropical high ridge are stably maintained between 23°N and 24°N, 500 hPa  trough over the western Lake Baikal has small fluctuation to mid-latitudes eastward, cold and warm air intersection in  the middle reach of the Yangtze River and low value system on the east side of the Qinghai-Xizang Plateau eastward that provide a favorable environmental conditions for the occurrence and continuance of rainstorm. The diurnal variation of southerly wind during Meiyu period causes the periodicity and diurnal variation characteristics of precipitation. MCSs are the direct influence systems of precipitation. From 8 to 14 July, there are many MCSs corresponding to the mesoscale convergence line,  mesoscale vortex, and convergence zone of airflow confluence center on the ground surface wind flied. Before the heavy precipitation occurred, the atmospheric stratification is potential instability, which provids the instability energy for the precipitation occurrence. Nearly heavy precipitation occurring, the atmospheric stratification appears a deep humid neutral stratification. When the heavy precipitation is about to terminate, the atmospheric stratification is convert to weak stability, and vapor in air column decreases. The above mentioned characteristics of the atmospheric stratification are certainly significant for precipitation prediction. During a continuous rainstorm, the obvious front and strong prefrontal ascending motion are very benefit to the generation and development of mesoscale convective system. The frontogenesis near front has close relationship with the generation and development of heavy precipitation. The calculated result of frontogenesis function shows that the horizontal deformation gives the biggest contribution to frontogenesis.