Omais was a TS tropical cyclone that formed in the East China Sea in 2021. The storm reached maximum sustained winds of 83 km/h (45 kt) with a minimum central pressure of 994 hPa. Tracking across the East China Seain the Western Pacific basin (, it potentially affected Japan, Korea, Taiwan and eastern China. The storm traveled from approximately 7.7°124.8° to 38.3°193.0°, crossing a range of 31 latitude and 68 longitude.