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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 large body of air having similar horizontal temperature and moisture characteristics.

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

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

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

A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...

A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...

A deviation from the normal or expected value in atmospheric or climatic conditions, often used in meteorology to identify...

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

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

The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.