Mature Stage

When the cumulus cloud becomes big, the water in it becomes heavy. It starts to fall out of the cloud. At the same time, cool dry air starts to enter the cloud. Cool air is heavier than warm air. The cool air creates a wind that blows downward. This wind pushes the heavy water to the ground. It starts to rain.

This cloud is now called a cumulonimbus cloud. Lightning and thunder start to occur. The cumulonimbus is now a thunderstorm.

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Rain

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Cumulonimbus

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Thunder and Lightning

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Types of Lightning

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