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

Three rounds of cold Arctic air from a shifting polar vortex are expected to plunge much of the central and eastern U.S. into a cold snap in the coming weeks, meteorologists say. The first wave of the ...

Feeling that sudden chill? A triple polar vortex is sweeping across parts of the U.S. Here’s what that means — and where it’s ...

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.

Thanks to the polar vortex, the first half of December will bring multiple waves of Arctic air to the U.S. Here's what to ...

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

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

A shifting polar vortex will send multiple rounds of Arctic air into the central and eastern United States through the first ...

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

Parts of the Upper Midwest and Northern Plains are already feeling the effects of air spilling in from Canada. On Thursday, ...

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.