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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

Occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather...

Conduction is the transfer of heat or electricity through a material without the material itself moving. This occurs when...

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

A periodic warming of sea surface temperatures in the central and eastern Pacific Ocean, significantly influencing global...

A distinct layer in a body of water where the temperature changes rapidly with depth, separating warmer surface water from...

A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...

A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...

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

A storm characterized by the presence of lightning and its acoustic effect on the Earth's atmosphere known as thunder.

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