It’s really, really cold again – as the US shivers through at least the eighth blast of air from the Arctic this winter. Here ...

WASHINGTON (AP) — The polar vortex hit its peak across much of America on Wednesday, with an icy grip that made Arctic ...

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

The easy answer is a deep southward dip in the polar jet stream that typically rings the globe at higher latitudes but is ...

It’s really, really cold again — as the US shivers through at least the eighth blast of air from the Arctic this winter. Winter, which is warming faster than any other season for much of the ...

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

The term “polar vortex” usually refers to the gigantic circular upper air weather pattern in the Arctic region. It is a ...

A lobe of the polar vortex, a ring of freezing air typically found near the North Pole, will once again move into the central and eastern states this week, bringing some of the coldest air of the ...

The polar vortex is coming back. After a half-month hiatus, frigid air will again surge across the United States beginning this weekend through next week, as the unusually cold blob of air dips ...

Is this stream of cold air "a polar vortex?" Not in the truest sense of the word, scientists say. This week the actual polar vortex, which lives in the stratosphere, may be helping to steer the ...