What Type of Cloud Is Associated with Hail?

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This NGSS-aligned science reading passage for middle school explains that cumulonimbus clouds are the main cloud type responsible for hail. It describes how strong updrafts in these towering storm clouds carry water droplets high into the atmosphere, where they freeze and grow as hailstones. Once the hail becomes too heavy for the updrafts to hold, it falls to the ground. The passage also introduces other severe weather linked to cumulonimbus clouds, such as lightning and tornadoes, helping students understand how these clouds form and why they matter in weather forecasting and Earth science lessons.

Written by Workybooks TeamPublished by Workybooks

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The type of cloud most often associated with hail is the cumulonimbus cloud. These are large, towering clouds that form during strong thunderstorms. Cumulonimbus clouds can grow very tall—sometimes reaching over 10 miles (16 kilometers) into the sky—and stretch through different layers of the atmosphere.

Hail forms inside these powerful clouds when updrafts (strong upward winds) carry water droplets high into the cold parts of the cloud. The droplets freeze into small pieces of ice. As they are lifted up and down by the wind, more layers of ice build up around them. Once the hailstones become too heavy for the updrafts to hold, they fall to the ground.

Cumulonimbus clouds are also responsible for producing lightning, thunder, heavy rain, and even tornadoes. These clouds need warm, moist air at the surface and cooler air above to form. The strong rising air inside them creates the perfect conditions for severe weather.

Hail can damage crops, cars, and buildings, especially when the stones are large. That’s why weather forecasters watch cumulonimbus clouds closely during thunderstorms.

Fun Fact: The largest hailstone ever recorded in the U.S. was nearly 8 inches wide—about the size of a volleyball!

What type of cloud is most often linked to hail?

StratusCirrusCumulonimbusNimbostratus

How does hail form inside a cloud?

Raindrops freeze on the groundIce falls from spaceWater droplets freeze in cold air and build up layersSnow melts and refreezes

What helps hailstones grow larger inside a cloud?

SunlightDownward windsUpdrafts that move them aroundCloud rotation

What causes hailstones to fall to the ground?

They melt in the airThey bounce off the cloudsThey become too heavy for the updraftsThe Sun pulls them down

What other weather can cumulonimbus clouds produce?

Gentle breezes and fogTornadoes, lightning, and heavy rainSnow and frostClear skies and sunshine

Why do weather forecasters watch cumulonimbus clouds?