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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 bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...

The formation of ice crystals on surfaces when the temperature drops below freezing, typically overnight, causing potential...

The narrow region between 35-40 ° N and S latitudes in the Northern and Southern Hemispheres, lying between the tropical...

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

The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...

Nimbostratus clouds are thick, dark, gray clouds associated with rainy and gloomy days that block the Sun. These clouds,...

A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...

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

A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.

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