The polar vortex is making a return to the forecast, but the counterintuitive weather feature is nothing to fear.

Predicting the intensity of each winter ahead of time can be a challenge, but this sign is causing many residents of colder ...

Bitingly cold Arctic air keeps pummeling the U.S. with ruthless cold snaps—despite warming winters nationwide. A study explains why: the solution lies far above your head, in the upper atmosphere ...

A cold winter is likely in store for those in the northern U.S., with milder temperatures across the southern tier, according to NOAA’s National Weather Service winter outlook issued Thursday. The ...

The polar vortex is shifting in ways that could unleash extreme cold, violent storms, and unstable weather patterns across ...

The polar vortex is a large region of low pressure and cold air that has always existed around Earth's poles. While the polar vortex is weakening for the season, it does not directly cause winter ...

The polar vortex is stirring up, bringing the earliest hints that the weather is changing as autumn has officially arrived. In the short term, this means gradual cool-downs and a more active storm ...

CLEVELAND — High above the Arctic, swirling like a giant icy crown, the polar vortex is a permanent feature of our atmosphere ...

In a month when a meteorologist said the polar vortex is ramping up, slightly less than half of Kansas has seen its first ...