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 state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.

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

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

Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...

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

An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...

A very cold high pressure that originates over the Arctic Ocean.

The trapping of heat in the Earth's atmosphere due to greenhouse gases, such as carbon dioxide and methane, which allows...

The process by which a solid changes directly into a gas without first becoming a liquid, such as ice turning into water...

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