Conclusion
The merging evolution of convective cells or MCCs were usually occurred in convective system and caused more precipitation and hazards. Using information of satellite imagery and radar reflectivity, the mergers were detected easily. On the other hand, because of the quite difference theories of satellite and radar detection, different evolutions of cells or MCCs merging were found. For this case, two kinds of merger were analyzed. As to the second evolution, a "build-break-build" system of merging "bridge", which was not any features in satellite imagery, was discovered in radar reflectivity field.