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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

Nor'easter is a meteorological event commonly observed in the Northeastern United States and typically occurs during the...

The formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...

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

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

A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...

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

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

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

An instrument used to measure the speed, force, and sometimes the direction of the wind. It can be cup or pressure tube anemometers....

Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...