The forecast released Oct. 16 predicts where above- or below-normal temperatures and above- or below-normal precipitation are ...

In an early sign of the winter weather that's coming, the dreaded polar vortex is making news yet again. The polar vortex is ...

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

It still feels summery in Mississippi with daytime highs in the 80s and relatively high humidity. But nights are getting a hint of a chill, and winter will be here before you know it. The polar vortex ...

The polar vortex, a mass of cold air over the Arctic, is beginning its seasonal strengthening. A strong polar vortex typically keeps the coldest air locked near the North Pole. A weaker or wobbling ...

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 ...

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 ...

The polar vortex is beginning to stir, signaling a gradual shift toward cooler fall weather in the northern U.S. Tennessee is expected to see mild temperatures through December, with the average first ...

Indiana can expect dry temperatures around the state at the beginning of October. Although fall kicked off earlier this week, it'll be a little while before we are affected by a polar vortex. Hoosiers ...

The mean first frost in the Providence is Oct. 23, but that varies by town. See the cities and towns the National Weather ...

The polar vortex is a broad, fast ribbon of cold air that encapsulates the Arctic high in the stratosphere. Stable, it confines cold air near the North Pole. Unstable, it is rocked and stretched out ...