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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

Jet streams are strong, fast-flowing air currents in the upper levels of the atmosphere. They form when warm air masses meet...

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

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

A polar vortex is a circulating mass of air in the atmosphere, typically found in polar regions. This rotating air mass occurs...

Coastal flooding occurs when water from the ocean, sea, or large lakes inundates land areas along the coast, usually due...

The scientific study of climate, focusing on the analysis of long-term weather patterns and trends over time.

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

A prefix used in cloud nomenclature to describe middle-altitude clouds that form between 6,500 and 20,000 feet, such as altostratus...

A low-pressure area with converging winds, rotating counterclockwise in the Northern Hemisphere and clockwise in the Southern...

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