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

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

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

The term used for turbulence occurring in the absence of clouds or cloud-like elements in the visible area. It is often observed...

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

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

A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...

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

The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

Weather conditions are the components that comprise the state of the atmosphere. The six main weather conditions are temperature,...