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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 tropical cyclone with sustained winds of at least 74 miles per hour, characterized by a central eye, strong winds, and...

The upward movement of air caused by a topographic barrier, such as a mountain, which can lead to cloud formation and precipitation.

In a severe storm, with a swirling motion in its left rear quadrant, a vertically rotating column of air, often seen with...

Anticyclones are areas of high atmospheric pressure that bring hot, dry weather in the summer and cold fronts in the winter.

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

Considerable cloudiness refers to weather conditions where a large portion of the sky is covered with clouds, but some clear...

A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...

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

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

Confluence refers to the area where two or more air streams or bodies of water meet and combine. In meteorology, it often...