The Upper Midwest and Northern Plains have been hit by Canada's freezing temperatures. On Thursday, Dec. 4, wind chills ...

The first of three expected polar vortex systems is predicted to bring frigid temperatures. Here's what is expected in South ...

There are early signs that the northeastern United States may be in for several waves of below-average low temperatures this ...

Such events distort the polar vortex, which causes Arctic air to descend into the U.S. and causes temperatures to plummet.

Storms, some of which may bring snow, are expected to accompany a push of colder air this week, and the next storm is ...

Temperatures across Indiana are set to be even colder tonight, as temperatures plunge into single digits and at the zero mark ...

Brace yourselves; winter is coming. "Polar vortex" may have been the weather catchphrase of last winter, but it's coming back and it's bringing snow and freezing temperatures along with it. While it ...

High above the North Pole, about 10 to 30 miles above Earth’s surface, sits a massive whirlpool of icy air known as the polar ...

The polar vortex is on the move with its Arctic blasts, but so are storms packing snow and ice. The weather pattern setting ...

A disturbance in the polar vortex could spill icy cold air south into the United States much earlier than usual, the National ...

But across the country, AccuWeather meteorologists are predicting major travel disruptions as a storm system is set to batter ...

Winter isn't over just yet. A major shift in the weather pattern could have millions across the United States once again reaching for their winter coats later this month before milder springlike air ...