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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

Anticyclones are areas of high atmospheric pressure that bring hot, dry weather in the summer and cold fronts in the winter.

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

The mass of air surrounding the earth and bound to it more or less permanently by the earth's gravitational attraction.

Ice forms on the surface of highways in a very thin layer that is difficult to distinguish from the color of the asphalt...

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

Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...

Snow that rises to 8 feet or higher.

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

A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...

Weather is the day-to-day meteorological conditions that happen in our atmosphere. Weather can change within minutes, which...