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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

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

A fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...

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

The large-scale movement of air that distributes heat and moisture around the Earth, influencing weather patterns and climatic...

A weather front formed when a cold front overtakes a warm front, lifting the warm air off the ground and resulting in a mix...

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

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

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

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

A thermodynamic change process in the system without any exchange of heat or transfer of energy between systems. This process...