Solid precipitation in the form of balls or pellets of ice, generally taken to be 5 mm in diameter or larger. (Smaller particles are known as small hail or ice pellets.) Hail originates as ice pellets or graupel that are suspended in the updraught within a cumulonimbus cloud, and grow by the accretion of supercooled water droplets in alternating layers of rime and glaze, until the mass can no longer be supported. The largest sizes may exceed 50 mm across, and the heaviest individual hailstones of c.1 kg were recorded at Gopalganj, Bangladesh on 14 April 1986. Hailstone aggregates of 3.4 kg and 4 kg were reported from Hyderabad, India in 1939, and Yüwu, China in 1902, respectively.