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

Nimbostratus clouds are thick, dark, gray clouds associated with rainy and gloomy days that block the Sun. These clouds,...

Perhaps you have come across them, maybe you are seeing them for the first time. These clouds, known as wave clouds, resemble...

Observation of the sky from the observer's location where there are no clouds, and there is no obstruction to visibility....

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

A line on a weather map connecting points of equal atmospheric pressure, used to identify high and low-pressure systems.

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.

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 distinct layer in a body of water where the temperature changes rapidly with depth, separating warmer surface water from...