Dark blue cloudy sky

What is Cumulus?

Large, fluffy white clouds with flat bases, typically indicating fair weather, though they can develop into storm clouds under the right conditions.

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Glossary

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

Condensation is the process by which water vapor in the air cools and changes into liquid water. This process is crucial...

A measure of how hot it feels when relative humidity is combined with the actual air temperature, often referred to as the...

Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...

A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...

A tropical cyclone with sustained winds of at least 74 miles per hour, characterized by a central eye, strong winds, and...

A fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...

Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...

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

Confluence refers to the area where two or more air streams or bodies of water meet and combine. In meteorology, it often...