Dark blue cloudy sky

What is Arctic Air?

A mass of very cold, dry air that mostly originates over the Arctic Ocean.

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Glossary

Meteorology is the scientific study of the atmosphere and weather processes. It involves observing, analyzing, and forecasting...

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

A closed low, also known as a cut-off low, is a low-pressure system that is entirely isolated from the main atmospheric circulation...

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

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

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

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

A condition in which the stratification of the atmosphere depends on both air temperature and pressure, and where surfaces...

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 cloud of irregular appearance, composed of irregular cloud fragments.