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

A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...

Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...

The amount of radiation, heat, or light passing through or flowing from a unit area of a surface.

A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...

An instrument used to measure the speed, force, and sometimes the direction of the wind. It can be cup or pressure tube anemometers....

Ice forms on the surface of highways in a very thin layer that is difficult to distinguish from the color of the asphalt...

The upward movement of air caused by a topographic barrier, such as a mountain, which can lead to cloud formation and precipitation.

A middle cloud type within the B family in the international cloud classification. These are shaded clouds that can be white...

A type of cloud consisting mostly of small particles such as ice particles.

Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.