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

A strong, downward wind caused by a localized column of air sinking rapidly, often resulting in damage similar to that caused...

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

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

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

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

A middle cloud type within the B family in the international cloud classification. These are shaded clouds that can be white...

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

A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.

A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...