Add Yahoo as a preferred source to see more of our stories on Google. Polar Vortex Animation Waves of frigid air will continue to be released into much of the eastern United States through at least ...

With over 170 million Americans facing below average temperatures, even colder air may be on the horizon thanks to the displacement of the polar vortex that will lock in a deep winter feel and park ...

A stronger polar vortex is developing over the Arctic. Here's what it could mean for winter, including the role of a powerful El Niño.

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