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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

The term used for semi-stationary high-pressure centers such as the Azores and North Pacific Highs, which occur in the narrow...

A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.

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

A middle cloud type within the B family in the international cloud classification. These clouds consist of water droplets...

Snow that rises to 8 feet or higher.

The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.

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

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

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

An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...