Question

what is the one factor that causes hailstone to fall?

Answer 1

Hey dude,

❦Hailstorms form within a unusually unstable air mass, that is, an air mass in which the temperature falloff with height is much greater than normal.

❦The unstable air is necessary to produce large updraft speeds -- fast enough to keep a developing hailstone from falling to the ground.

@BavanaLand

Answer 2

Answer:

Hail forms when thunderstorm updrafts are strong enough to carry water droplets well above the freezing level. This freezing process forms a hailstone, which can grow as additional water freezes onto it. Eventually, the hailstone becomes too heavy for the updrafts to support it and it falls to the ground.

Hope it helps you