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 condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...

A drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.

A rapidly rotating column of air extending from a thunderstorm to the ground, capable of causing significant damage.

An instrument for measuring atmospheric pressure.

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

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

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

The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...

Snow that rises to 8 feet or higher.

The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...