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 ...

Unable to view our graphics? Click here to see them. Polar vortex and jet stream are both extending southward into the US The National Oceanic and Atmospheric Administration's Global Forecasting ...

It's a term you hear every couple of winters, when we get stuck in the coldest of cold patterns – polar vortex. But what exactly is it and how does it impact our weather? The polar vortex is ...

The mere mention of the term “polar vortex” can set your head spinning (and maybe eyes rolling). It’s got to be clickbait, right? Or maybe someone dreamed up the name for views? Is it a storm?

A lobe of the polar vortex, a stormy ring that typically keeps the coldest air locked up near the North Pole, will dip southward into the United States this weekend into next week. Polar air ...

Much of the country is in for widespread and dangerously cold temperatures beginning this weekend — and lasting through much of next week — as a lobe of the polar vortex over northern ...

A dangerous and potentially life-threatening stretch of cold weather has much of the U.S. on alert as a lobe of the polar vortex invades the nation and sends temperatures tumbling to levels not ...

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 ...

At the same time we go into a touch milder southwest flow, the polar vortex will still be churning away over northeast Canada. I don’t expect a full onslaught of the polar vortex to shift south ...