It is a weather phenomenon in which ice balls known as hail fall from the sky as precipitation. These ice balls are nothing but solid rain that forms under certain conditions. Hails are formed at high altitudes in the clouds when supercooled water droplets stick to each other and form layers of ice. The average speed of the hailstorm is 170 Km/h. For hailstorms, several conditions are necessary to occur, e.g., the development of cumulonimbus clouds at high altitudes are necessary hailstorms.