How does hail form?
by 
Answerbag Staff
ANSWERS: 3
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you know the formation of clouds. there are dust particles in the air which help the rains begin. the dust particles gather around themselves more water and create bigger raindrops. when these raindrops meet with an extremely cold air, they become solid icedrops and by this way the hail forms...
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If you've ever dissected a hailstone you'll notice it's layered. Hail doesn't just drop straight down. First the raindrop forms, drops, freezes, and an updraft or strong wild will knock it back up, where more water coagulates around the original particle. This can happen many times, leading to the wide variety in size between hailstones. Some are no bigger than small raindrops, others are colossal - the 1986 tornado in Edmonton, Canada, had hailstones as big as two softballs put together. The violent weather prevented the hail from dropping until it was very heavy, so the stones that dropped were very large, but fortunately relatively few in number.
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Moisture in the upper atmosphere condenses and forms small ice crystals that begin to fall to the ground collecting more moisture along the way.. They then run into a strong updraft that lifts them back up where the moisture freezes. They then fall and this cycle is repeated over and over until the weight of the ice chunk cannot be supported. It then falls to earth collecting more ice on the way down. The more severe the storm, the stronger the updraft and the larger hail can be created.
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