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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

Convection is the vertical movement of air caused by temperature differences, where warm air rises and cool air sinks. It...

Air laden with sand and dust, common in areas devoid of permanent vegetation, especially deserts.

A very cold high pressure that originates over the Arctic Ocean.

A body that has the property of absorbing all electromagnetic radiation falling on it, and therefore is the theoretical body...

A tropical cyclone, also called a hurricane, is a severe tropical storm with wind speeds in excess of 74 mph. Known as a...

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 scale for estimating wind speed based on observed conditions of the sea or land. It ranges from 0 (calm) to 12 (hurricane)...

A tropical cyclone with sustained winds of at least 74 miles per hour, characterized by a central eye, strong winds, and...

A cold front is the leading edge of a cold air mass that replaces a warmer air mass. It is typically associated with sudden...

Particles such as pollen, grass seeds, or dust in the air that cause allergies and are transported by winds.