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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

An elongated area of relatively low atmospheric pressure, often associated with unsettled weather conditions like storms...

A very cold high pressure that originates over the Arctic Ocean.

A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...

A strong wind typically ranging from 34 to 40 knots (39 to 46 miles per hour) and often associated with rough seas and stormy...

A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.

Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.

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

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

Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...

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