Lionrock was a TS tropical cyclone that formed in the Philippine Sea in 2021. The storm reached maximum sustained winds of 65 km/h (35 kt) with a minimum central pressure of 994 hPa. Tracking across the Philippine Seain the Western Pacific basin (, it potentially affected the Philippines, Taiwan and Japan. The storm traveled from approximately 6.9°105.9° to 20.7°130.8°, crossing a range of 14 latitude and 25 longitude.