Dark blue cloudy sky

What is Cumulonimbus?

A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe weather like hail or tornadoes.

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Glossary

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A mass of very cold, dry air that mostly originates over the Arctic Ocean.

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A very cold high pressure that originates over the Arctic Ocean.

A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

A sudden and rapid flow of snow masses accumulated on the slopes of mountainous areas under the influence of gravity or a...