"An Arctic air mass is expected to plunge into the Central U.S. this week, with high confidence for widespread, ...

The polar vortex’s icy grip on much of America has Arctic Greenland seeming like a toasty vacation spot by comparison.

How Alaska’s cold keeps ending up in the Lower 48 A few atmospheric factors — including the polar vortex — have come together to make the US the epicenter of cold this winter. One is a ...

An Arctic blast tied in part to the polar vortex is driving record frigid air south from the Northern Plains toward the Gulf ...

The polar vortex has returned to the U.S., and frostbite-inducing temperatures are blasting millions of Americans.

Meteorologists warn that the coldest burst of Arctic air this season is coming to put an icy and prolonged exclamation point ...

The polar vortex is not synonymous with cold snaps, but when it slides toward the United States, the polar jet stream can ...

LOUISVILLE, Ky. (AP) — Harsh weather moved west on Monday as a polar vortex was expected to grip the Rockies and the northern ...

Meteorologists explained that polar vortex intrusions are usually not disruptive, however, they can occasionally lead to cold air outbreaks and winter storms, which may affect travel conditions ...

More than 95 million people are facing gripping cold Tuesday as a polar vortex sends temperatures plunging to record levels, ...

A group of people walk toward the pedestrian tunnel that connects Hyde Park to Promontory Point as Presidents Day temperatures dropped and stayed cold across the Chicago area on Monday. Tyler ...