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

Nimbostratus clouds are thick, dark, gray clouds associated with rainy and gloomy days that block the Sun. These clouds,...

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

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

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...

A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...

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

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

The temperature at which air becomes saturated with moisture and water vapor begins to condense into liquid form, leading...

Air laden with sand and dust, common in areas devoid of permanent vegetation, especially deserts.

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