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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

Anticyclones are areas of high atmospheric pressure that bring hot, dry weather in the summer and cold fronts in the winter.

A measurement determined by the wave lengths and sea conditions caused by the effect of wind, and by the movement of tree...

A measure of how hot it feels when relative humidity is combined with the actual air temperature, often referred to as the...

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

A periodic warming of sea surface temperatures in the central and eastern Pacific Ocean, significantly influencing global...

Frozen drizzle is a dangerous type of frozen rain. It’s a light rain that falls in very fine drops, which freezes on contact...

A weather warning means that a weather hazard is occurring, imminent, or likely. In other words, severe weather is happening...

A middle cloud type within the B family in the international cloud classification. These are shaded clouds that can be white...

A continental air mass is a large body of air that forms over land, characterized by dry conditions due to the lack of moisture...

A sudden electrostatic discharge during a thunderstorm between electrically charged regions of a cloud, between clouds, or...