The effect this will have on U.S. weather remains uncertain. While other forecasters agree that a polar vortex ...

Forecast models show the polar vortex could reverse direction in early November, potentially influencing U.S. weather patterns later in the month.

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. The U.S. is set to feel the impacts of an Arctic polar vortex next week ...

A stronger polar vortex is developing over the Arctic. Here's what it could mean for winter, including the role of a powerful El Niño.

If you're booking flights or planning a road trip for the holidays, you've probably seen headlines about a "Super El Niño" ...

Every winter, forecasters and headlines start throwing around phrases that sound dramatic and a little confusing. Some of ...

Snow season has gotten off to a fast start across swaths of the northern United States this year. Fueled in part by an unusually early disruption to the polar vortex — which is now easing — 18 states ...

In yet another sign that winter weather is either here or will be soon, the dreaded polar vortex is making news yet again. Its potential arrival in the United States over the next few weeks is cause ...

A Polar Vortex brought temperatures so cold in January 2014 that it froze Niagara Falls. Signals of a rare sudden stratospheric warming in the next two weeks have some forecasting an imminent Arctic ...

The polar vortex is forecast to weaken unusually early, and that could lead to more persistent cold weather in at least parts of the U.S. in December. Last week, almost 100 daily record lows were tied ...

Michigan is experiencing frigid temperatures and heavy snow due to a dip in the jet stream, not the polar vortex. The polar vortex is a large-scale cyclone of cold air that typically stays far north ...