Ask most people what the polar vortex is and you'll get a vague answer about "that cold thing from the news." Ask a ...

Add Yahoo as a preferred source to see more of our stories on Google. The polar vortex explains why extreme cold still grips parts of the U.S. despite warmer winters overall. (CREDIT: Shutterstock ...

Forecast models show Antarctica's polar vortex strengthening as winter continues. Here's why meteorologists are watching and ...

Snow season has gotten off to a fast start across swaths of the northern United States this year. Fueled in part by an unusually early disruption to the polar vortex — which is now easing — 18 ...

Add Yahoo as a preferred source to see more of our stories on Google. The polar vortex collapse forecast brings the return of winter the Northeast, with brutal cold air returning to New Jersey ...

Our first true shot of winter arrives late Sunday and spills into the first half of next week. I’m not talking about snow. Instead, a shot of Arctic air will plunge south into the United States from ...

A wide swath of the western U.S. may be in for below-average temperatures as forecasts suggest an Arctic blast is looming. Reading time 3 minutes Much of the contiguous U.S. could be in for a very ...

As one blast of Arctic air pushes out to sea, already a new surge of cold air, driven by a breakdown of the polar vortex, is likely to expand from central Canada and through the midwestern and ...

CLEVELAND — The temperature outside was so cold that your fingers, toes, nose and cheeks felt like they were burning. A harsh Arctic cold wave brought record-breaking temperatures to the United ...