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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 situation where there is no advection because the constant pressure surfaces and temperature surfaces in the atmosphere...

Ice forms on the surface of highways in a very thin layer that is difficult to distinguish from the color of the asphalt...

A type of low-altitude cloud that forms in uniform layers, often covering the entire sky and producing overcast conditions.

An instrument used to measure the speed, force, and sometimes the direction of the wind. It can be cup or pressure tube anemometers....

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

The term 'cloudy' refers to weather conditions characterized by a significant amount of cloud cover in the sky. This may...

Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.

The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....

The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...

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