Forecasters warn that a split polar vortex is set to bring a 'large supply of cold air' to North America in mid-February as a ...

A rare "daughter polar vortex" is set to plunge millions of Americans into freezing temperatures as a prolonged period of ...

The long-range data shows we may be done with a true Arctic air mass similar to what we experienced in January. But we ...

Much of the U.S. is being blasted by ice, snow and wind, as the polar vortex that dipped south over the weekend is keeping an ...

A strong polar vortex in the stratosphere has brought subzero temperatures to the Midwest, Mid-Atlantic and deep into the South.

A polar vortex is currently hitting the United States, with schools closed in many areas and at least four deaths caused by ...

Most of the US will enjoy milder temperatures on Thursday, but the warmup will be brief as a polar vortex will send temperatures tumbling below freezing for most of the nation starting this ...

The weather flow is gradually changing now and as we head into early February. Our storm systems will come from the west and ...

Americans have been warned to brace for more winter storms as Arctic winds are set to dump more ice and snow amid freezing temperatures.

Some 60 million people are under weather alerts across 30 states. Seven of them have declared emergencies: Maryland, Virginia ...

The polar vortex can be a powerful source of winter weather, but it's not the only cause of severe cold and snow in regions better known for warmth and sunshine. The Gulf Coast states are still ...

The polar vortex, a natural atmospheric phenomenon, influences global winter weather by circulating Arctic air. Its expansion ...