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

Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...

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

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

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

Bright and dark rays with changing colors and contrast in the sky. These rays become visible due to the reflection of atmospheric...

CONQ is a meteorological abbreviation for significant convection observed in a specific area, often indicating unstable atmospheric...

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

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 small, intense downdraft that produces damaging winds at the surface, typically lasting a few minutes and often associated...

A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.