Hail does form during thunderstorms and when it is below freezing temperatures in the atmosphere. Hail is a super-cooled water vapor and freezes once it comes into contact with the atmosphere.
David wrote the most accurate and complete description of hail and snow.
Explanation:
Snow forms when tiny ice crystals in clouds stick together to become snowflakes. ... Snowflakes that descend through moist air that is slightly warmer than 0 °C will melt around the edges and stick together to produce big flakes. Snowflakes that fall through cold, dry air produce powdery snow that does not stick together.
Hailstones are formed when raindrops are carried upward by thunderstorm updrafts into extremely cold areas of the atmosphere and freeze. ... The hail falls when the thunderstorm's updraft can no longer support the weight of the hailstone, which can occur if the stone becomes large enough or the updraft weakens.
