This paper shows the typical cloud patterns of the life cycle of the meso-α-scale convective cloud clusters, the flow patterns in the lower troposphere in their formative and developing stages and the vertical structure in the mature stage. The results show that in the warm season there are mesoscale convective complexes (MCC) in South China and they are similar to those that occur in the central United States. They form in the upper-level trough, in the left side of the lower-level jet, and in the surface pre-frontal area. As the front moves southeastwards, cloud clusters develop rapidly in the area where convergence is strongest. The clusters are strongest in the early morning, at that time the precipitation is also most intensive, the precipitation becomes weaker in noon. In the satellite images the cloud cluster appears in a dense and isolate oval-shape cloud area, its longer axis is about 800 km. Within the cluster from sea-level to 300 hPa there is convergence, and a warm core when the cloud cluster is in mature stage