The majority of the United States will experience chilling temperatures due to a blast of arctic air from Canada. The Midwest ...

Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season.

What is the polar vortex? This article explains what a polar vortex is in simple terms, how it influences winter weather in the U.S., and why meteorologists talk about it during major cold events.

Meteorologists are currently monitoring a massive atmospheric anomaly as a significant disruption of the polar vortex begins to take shape this January. Researchers describe the current movement as ...

Year-round, severe, Artic air is usually kept tightly contained in the North Pole. Arctic wind patterns create a sort of wall ...

The big winter (and popular) topic is dusted off very early this season as frigid air plunges south next weekend. But what is ...

Behind the historic winter storm that blasted 40 states this weekend, a dome of Arctic air associated with the polar vortex ...

The brief respite of a January thaw is over as a significant pattern shift readies a return to harsh winter conditions across ...

The displaced polar vortex will bring prolonged periods of cold to the eastern portion of the Lower 48 through the end of ...

Michigan is set for several days of frigid temperatures and heavy lake-effect snow as Arctic air continues its slow march across the eastern U.S.

A shift in the polar vortex has forecasters watching closely as the coldest air of the season approaches. Here's what to know ...

A storm riding the edge of incoming polar air could bring the D.C. region a meaningful snowfall Sunday, but the exact track ...