利用NCEP/NCAR资料、 雷达回波、 卫星云图和闪电定位系统等新一代探测资料对2010年9月21-23日的云南雷暴过程进行了分析。结果表明, 西移的热带低压“凡亚比”为这次雷暴云团发展提供了热带偏东风辐合及低层暖（300～302 K）、 中层湿（相对湿度≥80%）等有利环流背景条件。中尺度雷暴云团负闪电占主导地位， 发展阶段云顶亮温下降， 均为负闪电， 负闪电频数高达1 245次·(30 min)-1； 从成熟阶段到消散阶段， 云顶亮温逐渐上升， 负闪电逐渐减少， 有少量的正闪电出现并逐渐增加\.另外， 雷暴云团结构和闪电空间分布不均匀， 具有前部为主对流区而后部为云砧或高云的结构特征， 云顶亮温前部较后部低且梯度大\.密集负闪电主要出现在云顶亮温≤-60 ℃附近和前部大的云顶亮温梯度区， 稀疏正闪电分散在密集负闪电后部和云团中部\.多普勒天气雷达显示， 雷暴云团前部云区表现为具有不均匀结构的中尺度带状回波， 后部云区属于无回波区; 密集负闪电主要出现在带状回波上强度≥40 dBz和顶高≥10 km的强回波区内及中尺度不均匀风场附近， 且回波强度越强、 顶高越高， 负闪电越密集; 发展后期稀疏的正闪电分散在强回波的后部边缘或者后部弱的对流回波和层状云回波上。

Using NCEP/NCAP data and new generation monitoring detection data of radar echo, satellite cloud image and lightning position system, the thunderstorm process in Yunnan from 21 to 23  September 2010 is analyzed. The results show that westward moving of tropical depression ‘FANAPI’  provided the advantageous circulation background conditions of easterly convergence, warm between 300 K and 302 K on the low level and wet (relativity is above 80% ) on the upper level. Negative lightning plays a role in the whole lifetime of a thunderstorm cloud cluster. The cloud top brightness temperature decreases and all lightning is negative and its frequency reaches up to 1 245 times·(30 min)-1 at the development stage. The cloud top brightness temperature gradually increases, the negative lightning decreases, a small amount of positive lightning emerge and rise gradually from mature to disappear stages. In addition, the spatial distributions of thunderstorm cloud cluster structure and lightning are asymmetric. The structure feature is that the front is main convective zone and the rearward is plume or high cloud. The cloud top brightness temperature in the front is lower than that the rearward, and its gradient larger. Dense negative lightning mainly located in the region with cloud top brightness temperature≤-60 ℃ and its big gradient in the front. Sparse positive lightning disperse in the rearward of dense negative lightning and the cloud center. From Doppler weather radar, it is found that the cloud zone in the front of thunderstorm cloud cluster appears the mesoscale band echo of nonuniform structure, and echo free space in the rearward. The dense negative lightning mainly locate at the severe echo with intensity≥40 dBz and ET≥10 km, and nearby the nonuniform wind field of mesoscale. And the more the echo intensity, the higher the ET and the denser the negative lightning. Sparse positive lightning disperse in the rearward of severe or weak convective echoes or sheet echo at the later stage of development.