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

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

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

The reflectance rate of a surface, indicating the amount of electromagnetic radiation reflected from the surface. It depends...

The names given to the winds blowing from the four cardinal directions (north, east, south, and west - N, E, S, W) on a compass.

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

The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...

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

A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...

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

A rapidly rotating column of air extending from a thunderstorm to the ground, capable of causing significant damage.