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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

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

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

A blizzard is a storm that lasts 3 hours or more, with persistent winds/frequent gusts of 35 mph or more along with significant...

Snow that rises to 8 feet or higher.

Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.

A thick cloud of tiny water droplets suspended in the atmosphere near the Earth's surface, significantly reducing visibility.

A mass of very cold, dry air that mostly originates over the Arctic Ocean.

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

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

A continental air mass is a large body of air that forms over land, characterized by dry conditions due to the lack of moisture...