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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 cold core low is a low-pressure system where the coldest temperatures are found near the center. These systems are often...

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

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

The amount of radiation, heat, or light passing through or flowing from a unit area of a surface.

A fixed potential temperature line on adiabats, or the process of thermodynamic changes within a system without any exchange...

A periodic cooling of sea surface temperatures in the central and eastern Pacific Ocean, often leading to altered global...

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

A bomb cyclone is a large mid-latitude storm that forms when a storm’s central pressure drops (i.e. “bombs out”), resulting...

Large, fluffy white clouds with flat bases, typically indicating fair weather, though they can develop into storm clouds...

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