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This pattern change would be good for a couple of parts of the country ... time we go into a touch milder southwest flow, the polar vortex will still be churning away over northeast Canada.

A polar vortex is currently hitting the United States, with schools closed in many parts of the country and at least four reported deaths caused by treacherous conditions. Heavy snow falls as a ...

but the warmup will be brief as a polar vortex will send temperatures tumbling below freezing for most of the nation starting this weekend. Despite a cold start across parts of the eastern US on ...

Wind chill temperatures of minus-30 to minus-40 may occur in parts of the northern Plains and Upper Midwest early next week. Many people across the United States may recall the polar vortex ...

However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is bringing an even harsher arctic blast to million Americans this week. Maps show what to expect as the cold front ...

One of the key players in these dramatic shifts is something called the polar vortex. The polar vortex is a massive area of cold air located high in the atmosphere, typically spinning over the ...

New forecast maps indicate that parts of the country are set to experience a reprieve from the icy temperatures that hit much of the United States during early January. The Arctic polar vortex has ...

But during the winter, it is joined by a second atmospheric phenomenon dubbed the polar vortex. This swirl of frigid air, located more than 10 miles above Earth’s surface, strengthens each year ...

This is a result of a phenomenon known as the polar vortex. “The polar vortex is just a spinning of the earth’s atmosphere higher up in the higher latitudes, the polar regions, and at about 20 ...

Intense snowy wintry weather in the US has been fuelled by activity of the polar vortex, slipping down to engulf large parts of the country. Early January's winter storm prompted seven states to ...

DALLAS (AP) — An area stretching from Texas to Tennessee braced Wednesday for the possible arrival of freezing rain and snow even as some other parts of the U.S. hit by the plunging polar vortex ...