The Earth's polar vortex is stirring up, bringing the first hints at changing weather as fall descends on the U.S. This movement means gradual cooling and a more active storm track across the northern ...

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 ...

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A rare glimpse into the wintry conditions of the Mars north polar vortex has shown that temperatures inside the vortex are far colder than outside, and that the permanent darkness that winter brings ...

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 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 ...

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 ...

While many across the Lower 48 have been enjoying a relatively warm and dry start to autumn, Siberian snow has already been growing and may add a chill to your winter forecast. One of these key ...

And for Mandy Moore—who is mom to sons Gus, 4, and Ozzie, 2, as well as daughter Lou, 12 months, with husband Taylor Goldsmith—there’s been a learning curve when it comes to balancing her life as a ...

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 polar vortex is one of Earth’s most powerful climate systems and scientists believe it may be collapsing. This could trigger extreme weather shifts and possibly even a new ice age. In this video, ...