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

The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.

An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...

A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.

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

The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...

In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...

The branch of science dealing with the laws of motion of air or other gases.

A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...

An instrument used to measure the speed, force, and sometimes the direction of the wind. It can be cup or pressure tube anemometers....

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