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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Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.

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

A weather front formed when a cold front overtakes a warm front, lifting the warm air off the ground and resulting in a mix...

Nimbostratus clouds are thick, dark, gray clouds associated with rainy and gloomy days that block the Sun. These clouds,...