Dark blue cloudy sky

What is Humidity?

The amount of water vapor present in the air, which can affect comfort levels and weather 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...

A low-pressure area with converging winds, rotating counterclockwise in the Northern Hemisphere and clockwise in the Southern...

Nimbostratus clouds are thick, dark, gray clouds associated with rainy and gloomy days that block the Sun. These clouds,...

The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...

A body that has the property of absorbing all electromagnetic radiation falling on it, and therefore is the theoretical body...

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

A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.

An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...

Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.

A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...