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Below are definitions of important severe storm terms.

• condensation: the process by which water vapor turns into liquid water
• cumulonimbus: a very large thundercloud that brings heavy rain, hail, or snow
• hailstones: small pellets of ice that fall from cumulonimbus clouds
• storm: violent disturbance of the atmosphere accompanied by thunder, lightning, rain, snow or hail
• thunderhead: the top part of a thundercloud

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