Abstract: The severe weather in 1-2 June 2015 over several provinces along the Yangtze River caused serious disaster. Some reservoirs released water through the floodgates with the maximum limited water levels of many reservoirs and continuous rising of the Yangtze water level.There are many MCSs with heavy rainstorms occurred over Yangtze River Basin during 1-2 June. Most of them moved eastwards. Some quasistationary ones strengthened, developed and caused concentrative, intensive and sudden torrential rainfall such as the one over southern Hubei. This MCS lasted 10.5 hours and its convection developed extremely strong. According to the observation from Doppler radar, the echo top of this MCS raised higher than 18 km and the reflectivity larger than 40 dBz also raised to 10 km that showed uncommonly in the heavy precipitation over the Yangtze River Basin.