"A polar vortex is simply that: a vortex that originates over the polar regions," according to AccuWeather meteorologist Bernie Rayno. "Because it starts over the polar regions, it has arctic air. During the wintertime, as a polar cortex comes southward into central Canada, it can deliver cold air all the way down toward the Gulf Coast."
When high pressure builds into the Arctic Circle, the polar vortex is pushed south and away from the pole, giving it an opportunity to sink into the United States.
As the polar vortex encroaches upon your area, be prepared for an arctic chill.
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