Any thunderstorm which produces hail that reaches the ground is known as a hailstorm. [5] an ice crystal with a diameter of >5 mm (0. 20 in) is considered a hailstone. Hail falls when it becomes heavy enough to overcome the strength of the thunderstorm updraft and is pulled toward the earth by gravity.

Hail is precipitation in the form of small ice balls or pieces with a diameter of 5 mm (about 0. 2 inch) to over 15 cm (about 6 inches). This precipitation often accompanies thunderstorms. It can damage and รขโ‚ฌยฆ