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 term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

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

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

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

A cloud of irregular appearance, composed of irregular cloud fragments.

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

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

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

The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.

The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.