The greatest flood took place in Changjiang river in 1998 since our country was founded . This paper analyzed the feather and the course of this flood from the weather circulation background and the rainfall characteristics.

• 1998年昌江发生了建国以来最大洪水 文章从天气环流背景、降雨特征等方面分析这次洪水形成的特点和发展过程