The meiyu front, also known as baiu front, is a persistent nearly stationary weak baroclinic zone in the lower troposphere. It is located over the east coast of China and Taiwan at its western end, and over the Pacific Ocean south of Japan at its eastern end.
The term meiyu (mei-yu) is Chinese for "plum rains", pronounced baiu (bai-u) in Japanese (Chinese and Japanese: 梅雨).