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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

Weather is the day-to-day meteorological conditions that happen in our atmosphere. Weather can change within minutes, which...

Conduction is the transfer of heat or electricity through a material without the material itself moving. This occurs when...

A cloud that develops from Cirrus, completely or partially covering the sky, creating a halo effect, thin, sheet-like, milky...

The situation where there is no advection because the constant pressure surfaces and temperature surfaces in the atmosphere...

The horizontal transport of any feature within the atmosphere due to the movement of air (wind). This includes phenomena...

A towering cloud that often reaches great altitudes and is associated with thunderstorms, heavy rain, and sometimes severe...

A cold core high is a high-pressure system with cold air at its center. These systems are typically associated with clear...

An instrument that continuously records atmospheric pressure over time. It uses a barometer to measure pressure and creates...

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

Any form of water - liquid or solid - that falls from the atmosphere to the Earth's surface, including rain, snow, sleet,...