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

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 narrow band of strong winds in the upper atmosphere, typically flowing from west to east and influencing weather patterns.

A cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...

The measure of the water vapor or moisture content in the air, expressed as the mass of water vapor per unit volume of air....

A mass of very cold, dry air that mostly originates over the Arctic Ocean.

Bright and dark rays with changing colors and contrast in the sky. These rays become visible due to the reflection of atmospheric...

A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...

A thin, white cloud layer that is intertwined or separate, arranged in regular order, and does not cast a shadow.

The decrease in temperature with height in an adiabatically rising air parcel (lapse rate). For dry air, this value is 1...