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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 formation of fog when warm and moist air passes over a cool or cold surface or, conversely, when cold air passes over...

A weather system refers to the movement of warm and cold air across the globe, usually in a recurring pattern. Systems can...

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

Cloud condensation nuclei are tiny particles in the atmosphere, such as dust, salt, or pollutants, that provide surfaces...

Cloud or rain droplets containing pollutants, such as oxides of sulfur and nitrogen, to make them acidic.

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

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

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

The trapping of heat in the Earth's atmosphere due to greenhouse gases, such as carbon dioxide and methane, which allows...

A large body of air having similar horizontal temperature and moisture characteristics.