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Cumuliform clouds, often referred to as "heap" clouds, are a type of cloud formation that develops when moist air rises, expands, and cools to its dew point. This cooling causes water vapor to condense onto tiny particles, forming cloud droplets. Cumuliform clouds are characterized by their puffy, turreted shapes and are a result of turbulent air movement.123

There are several types of cumuliform clouds:
* Cumulus humilis: These are small, randomly distributed clouds found in the lower troposphere.3
* Stratocumulus: These form when cumulus clouds organize into lines. They are a more wintry version of cumulus clouds, spreading out in a flatter layer.34
* Cumulus congestus: These clouds extend into the middle troposphere.3
* Cumulonimbus: These are deep, precipitating cumuliform clouds that span the entire troposphere and are also known as thunderstorms.3

Clouds form within the troposphere, the lowest layer of Earth's atmosphere, where weather primarily occurs. The formation process is a key part of the water cycle.31

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