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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

An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms...

A type of low-altitude cloud that forms in uniform layers, often covering the entire sky and producing overcast conditions.

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 cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...

The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....

A cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...

The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...

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

A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...

Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...