Research has found that rising temperatures in the Arctic are weakening weather systems that normally trap the cold around ...

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 ...

frigid air pushes southward toward the U.S. What's the difference between an Arctic air mass and the polar vortex? Arctic air masses originate over the Arctic or Antarctic regions and are very cold.

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 ...

And if the polar vortex is to blame. First, a quick refresher on the polar vortex. The polar vortex is a region of very strong winds that form a circle around the North Pole. The vortex is located ...

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 ...

Millions of people across the U.S. will experience subzero or below-average temperatures in the coming days as a polar vortex coming from Siberia will usher in a new cold front. The Rockies ...

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 ...

Here is what is and isn't a polar vortex when Colorado receives cold like what is forecast for the holiday weekend.

But is Wisconsin in a polar vortex? And what is a polar vortex anyways? Here's what to know. What is a polar vortex? A polar vortex is a low pressure area where air swirls counterclockwise keeping ...

The polar vortex is always around. It is a channel of strong winds high up in the atmosphere that circles the poles. One over ...