A cold winter is in store for those in the northern U.S., with milder temperatures across the southern tier, according to ...

The polar vortex is stirring up, bringing the earliest hints that the weather is changing with the new fall season. When is ...

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

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

North Carolina's first freeze typically occurs between late October and mid-November, depending on the specific location. The ...

The polar vortex is starting to stir up, bringing the earliest hints that the seasons are changing. When will Ohio see its ...

The polar vortex is stirring up and bringing the earliest signs of changing weather. Here's when and what to know about the first frost in Pennsylvania ...

As the polar vortex begins to stir, subtle clues point to the coming seasonal shift. So, when will freezing temperatures arrive in Indiana?

The Earth's polar vortex is strengthening, signaling a gradual cooling and a more active storm track across the northern U.S. North Carolina's first freeze typically occurs between late October and ...

High above the Arctic, powerful winds are breaking apart — and the effects could reshape the planet. This film investigates how a collapsing polar vortex might lead to a new Ice Age.