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

Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....

A body that has the property of absorbing all electromagnetic radiation falling on it, and therefore is the theoretical body...

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

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

A thick cloud of tiny water droplets suspended in the atmosphere near the Earth's surface, significantly reducing visibility.

Large, fluffy white clouds with flat bases, typically indicating fair weather, though they can develop into storm clouds...

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

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

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 towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...