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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

The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...

Condensation pressure deficit refers to the difference between the actual vapor pressure and the saturation vapor pressure...

The large-scale movement of air that distributes heat and moisture around the Earth, influencing weather patterns and climatic...

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

Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.

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

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

The state of the atmosphere when it contains the maximum amount of water vapor possible at a given temperature and pressure.

The situation where there is no advection because the constant pressure surfaces and temperature surfaces in the atmosphere...

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