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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...

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

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

A type of cloud consisting mostly of small particles such as ice particles.

A small, intense downdraft that produces damaging winds at the surface, typically lasting a few minutes and often associated...

The percentage of water vapor in the air relative to the maximum amount of water vapor the air can hold at a given temperature.

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

The term used for turbulence occurring in the absence of clouds or cloud-like elements in the visible area. It is often observed...

The lowest level of a given cloud or cloud layer in the atmosphere, relative to the observer's position above the ground.

A line of severe thunderstorms that can form along or ahead of a cold front, often producing strong winds and heavy rain.