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 scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...

A sudden and rapid flow of snow masses accumulated on the slopes of mountainous areas under the influence of gravity or a...

A tropical cyclone with sustained winds of at least 74 miles per hour, characterized by a central eye, strong winds, and...

Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.

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

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

A type of cloud consisting mostly of small particles such as ice particles.

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

A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...

A middle cloud type within the B family in the international cloud classification. These clouds consist of water droplets...