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

Ice forms on the surface of highways in a very thin layer that is difficult to distinguish from the color of the asphalt...

The branch of science dealing with the laws of motion of air or other gases.

A sudden and rapid flow of snow masses accumulated on the slopes of mountainous areas under the influence of gravity or a...

Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.

The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...

A middle cloud type within the B family in the international cloud classification. These clouds consist of water droplets...

A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...

An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms...

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

An instrument for measuring atmospheric pressure.