The extreme precipitation is singularly large in the former 1950s and the 1990s, especially the 1990s is the most extreme precipitation periods in nearly 50 years.

• 1950年代中期之前及1990年代江淮地区梅雨期极端降水都处于异常偏多状态,1990年代是近50年中极端降水最多的时期。