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

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

A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...

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

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

Nor'easter is a meteorological event commonly observed in the Northeastern United States and typically occurs during the...

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

A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...

Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...

Conduction is the transfer of heat or electricity through a material without the material itself moving. This occurs when...

Condensation pressure deficit refers to the difference between the actual vapor pressure and the saturation vapor pressure...

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