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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

Ball lightning appears during thunderstorms, taking the shape of glowing, electric orbs in the sky. It can appear in a variety...

A very cold high pressure that originates over the Arctic Ocean.

Meteorology is the scientific study of the atmosphere and weather processes. It involves observing, analyzing, and forecasting...

The process by which a solid changes directly into a gas without first becoming a liquid, such as ice turning into water...

A cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...

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

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

The jet stream forming the boundary between tropical air and sub-tropical air, characterized by isothermal compression and...

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

A strong, downward wind caused by a localized column of air sinking rapidly, often resulting in damage similar to that caused...