Dark blue cloudy sky

What is Relative Humidity?

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

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Glossary

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

The process by which a solid changes directly into a gas without first becoming a liquid, such as ice turning into water...

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

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

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

A storm characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere known as thunder.

A strong wind typically ranging from 34 to 40 knots (39 to 46 miles per hour) and often associated with rough seas and stormy...

A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...

The amount of radiation, heat, or light passing through or flowing from a unit area of a surface.

Although it is also used for light winds, it is the general name given to the daily cyclical winds that occur mostly between...