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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 strong, downward wind caused by a localized column of air sinking rapidly, often resulting in damage similar to that caused...

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

A cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...

A mass of very cold, dry air that mostly originates over the Arctic Ocean.

Condensation pressure deficit refers to the difference between the actual vapor pressure and the saturation vapor pressure...

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

Thermodynamic changes occurring within a system without any exchange of heat with the surroundings. In the atmosphere, changes...

An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...

The jet stream forming the boundary between tropical air and sub-tropical air, characterized by isothermal compression and...

A weather front where two air masses meet but neither is strong enough to move the other, often resulting in prolonged periods...