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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

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

Nimbostratus clouds are thick, dark, gray clouds associated with rainy and gloomy days that block the Sun. These clouds,...

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

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

Indicates the amount of water the soil can absorb/retain through percolation. This capacity is around 7% in sandy soil and...

The trapping of heat in the Earth's atmosphere due to greenhouse gases, such as carbon dioxide and methane, which allows...

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

A term used to identify clouds with a base height below 6,000 feet in the observer's direction. Stratiform clouds consist...

An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...

A cloud of irregular appearance, composed of irregular cloud fragments.