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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

Thermodynamic changes occurring within a system without any exchange of heat with the surroundings. In the atmosphere, changes...

A long, narrow region in the atmosphere that transport water vapor, like a river in the sky.

Large, fluffy white clouds with flat bases, typically indicating fair weather, though they can develop into storm clouds...

Weather conditions are the components that comprise the state of the atmosphere. The six main weather conditions are temperature,...

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

A periodic warming of sea surface temperatures in the central and eastern Pacific Ocean, significantly influencing global...

Occurs when centers of high pressure and/or low pressure set up over a region in such a way that they prevent other weather...

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

A weather watch means there is a risk of weather hazards in the near future, which could pose a threat to life/property....

The amount of radiation, heat, or light passing through or flowing from a unit area of a surface.