Polar vortex systems will bring dangerously cold weather to much of the U.S. this month. Learn how to stay safe, and which ...

Winter isn't just knocking anymore. It's kicked the door wide open and brought the polar vortex along for the ride. If you've ...

The first of three rounds of bitter air has arrived, threatening record lows in cities from the Midwest to the Northeast.

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

A growing body of research indicates that polar vortexes are likely becoming more frequent due to the climate crisis.

Frigid Arctic air is pushing south into the United States, and fortunately, it doesn't look like freezing temperatures will ...

This historic cold wave is expected to sweep across the northern and eastern parts of the country, causing widespread ...

The central and eastern United States are bracing for an extraordinary cold snap just ahead of Christmas, according to a ...

A rare stratospheric event is forecast to unleash bone-chilling air from a weakening vortex across the US and New England, peaking during the first half of December.

Polar vortex will hit the U.S. with three waves of snow, extreme cold and storms. Will Mississippi weather feel the chill?