A serious flood,associated with Typhoon Marry in 2000,occurred in parts of the southeast of Hunan Province.According to the integrated analysis of rainfall intensity,weather situation,infrared nephogram and atmospheric physical parameters, the effect of low pressure,which developed from Typhoon Marry after it had weakened,in Hunan Province is described.It provides some reference for forecast of storm rainfall,due to landfall of typhoons in Hunan Province.