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What is Heat Index?

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

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Glossary

The large-scale movement of air that distributes heat and moisture around the Earth, influencing weather patterns and climatic...

The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.

Although it is also used for light winds, it is the general name given to the daily cyclical winds that occur mostly between...

A drainage wind that flows downhill due to gravity, often associated with cold air descending from elevated regions.

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

A cloud that develops from Cirrus, completely or partially covering the sky, creating a halo effect, thin, sheet-like, milky...

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

A cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...

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

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