Comparative Study on Two Kinds of Disaster Cloud Clusters over North China

The cloud clusters of severe disaster thunderstorm and torrential rain occurring over North China during the summer in 1998 are studied using satellite cloud pictures, conventional data and NWP analysis products. The results show that there are obvious differences for the two kinds of cloud clusters in the environmental conditions of their formation, development and moving model; Satellite cloud pictures combined with other data should be the effective way to monitor and predict the two kinds of cloud clusters.