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

The narrow region between 35-40 ° N and S latitudes in the Northern and Southern Hemispheres, lying between the tropical...

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

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

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

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

The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.

A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...

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

The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.