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

A sudden and rapid flow of snow masses accumulated on the slopes of mountainous areas under the influence of gravity or a...

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

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

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

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

A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...

A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...

Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....

A body that has the property of absorbing all electromagnetic radiation falling on it, and therefore is the theoretical body...