More dangerously cold air is on the way for much of the U.S. Will Tennessee be impacted? Here's what to know.

A winter buzzword, explained.

The Polar Vortex is expected to be impacted by a Sudden Stratosphere Warming, bringing cold air to the eastern US.

This winter’s harsh run in the East is intensifying, with some of the coldest air so far this season plunging into Vermont this weekend.

A major weather pattern change underway across U.S. As we get into next week, the storm track looks really interesting.

This winter’s harsh run is intensifying, with some of the coldest air so far this season plunging into New Hampshire.

The bitter cold temperatures that have left a chill over the eastern half of the country aren’t going anywhere, as a major disruption to the Polar Vortex is coming this month.

The Polar Vortex is expected to be impacted by a Sudden Stratosphere Warming, bringing cold air to the eastern US.