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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 tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...

The temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid form, leading...

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

The jet stream forming the boundary between tropical air and sub-tropical air, characterized by isothermal compression and...

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

An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...

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

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

Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...

Weather conditions are the components that comprise the state of the atmosphere. The six main weather conditions are temperature,...