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

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

The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...

Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.

A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.

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

A strong, downward wind caused by a localized column of air sinking rapidly, often resulting in damage similar to that caused...

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

Temperature scale, abbreviated as °C, found by accepting the freezing point of water at one atmospheric pressure as zero...

A fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...

A measure of how hot it feels when relative humidity is combined with the actual air temperature, often referred to as the...