Merbok was a TS tropical cyclone that formed in the East China Sea in 2011. The storm reached maximum sustained winds of 93 km/h (50 kt) with a minimum central pressure of 980 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 23.3°153.7° to 41.6°164.1°, crossing a range of 18 latitude and 10 longitude.