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What is Arctic Air?

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

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Glossary

A distinct layer in a body of water where the temperature changes rapidly with depth, separating warmer surface water from...

The heating of the Earth by the sun causes daily changes in both the direction and speed of the wind. During the day, ground...

An image on the weather radar that is convex to the direction of movement and resembles an arc shape, caused by mesoscale...

The amount of water vapor present in the air, which can affect comfort levels and weather conditions.

An anvil is a cloud mostly composed of ice particles. Otherwise known as a cumulonimbus cloud, an anvil has reached the stratospheric...

Precipitation in the form of small balls or lumps of ice that form in thunderstorm updrafts and fall to the ground.

The occurrence of storms resulting from the horizontal advection of cold air at high levels or the horizontal advection of...

A large, organized thunderstorm with a rotating updraft, often producing severe weather such as tornadoes, hail, and heavy...

The scientific study of climate, focusing on the analysis of long-term weather patterns and trends over time.

The process by which a solid changes directly into a gas without first becoming a liquid, such as ice turning into water...