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

Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...

A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...

A cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...

A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...

An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...

A middle cloud type within the B family in the international cloud classification. These clouds consist of water droplets...

The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.

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

The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.

A cloud that develops from Cirrus, completely or partially covering the sky, creating a halo effect, thin, sheet-like, milky...