By Jessica Black
•
March 3, 2025
When a thunderstorm has an updraft of water droplets, they can be lifted into freezing air temperatures, especially with stronger winds. Once this point is reached, the droplets freeze on contact and become pellets. These pellets will circulate within the cloud and continue to collect more cold-water droplets causing the ice pellets to grow larger. They will continue to go through this cycle until they become too heavy for the updraft to hold them, and then fall to the ground as hail stones. The strength of the updraft will determine the number of times the pellet cycles which will control the final size of the hailstone. When you are able to see hail falling in paths, it is known as a hail swath. There have been swaths know to be several acres up to over 100 miles long. Here are some cool hail facts: If it hails during a rain storm, it can cause the sky to turn green since hailstones reflect the entire spectrum of sunlight. \ It’s hard to measure how fast hail falls from the cloud. National Severe Storms Laboratory says a 2 ¾ inch baseball-sized hailstone can get up to 100mph. Hail typically falls in 5-10 minutes because of its fast movement and short bursts of energy. Sometimes it can last 30 minutes to 1 hour. If you break open a hailstone, you can usually see the layers to show how many times the pellet circulated before getting heavy and falling.