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 prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...

A large body of air having similar horizontal temperature and moisture characteristics.

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

A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...

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

The trapping of heat in the Earth's atmosphere due to greenhouse gases, such as carbon dioxide and methane, which allows...

A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.

A cloud of irregular appearance, composed of irregular cloud fragments.

Air laden with sand and dust, common in areas devoid of permanent vegetation, especially deserts.

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