Don't let the incoming string of relatively warm days in the greater Philadelphia region fool you; the polar vortex is still ...
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A series of polar vortex blasts may send temperatures plunging across the US
When parts of the vortex break down, lobes of Arctic air can drift south, guided by changes in the jet stream. This allows ...
A blast of cold air is expected to bring below-normal temperatures to Tennessee around Thanksgiving. The cold air is a result of the polar vortex expanding and pushing arctic air southward. Travelers ...
The Polar vortex is causing temperatures to plummet dangerously across the Philadelphia region, and frostbite could become a ...
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