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

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

Harsh weather moved west on Monday as a polar vortex was expected to grip the Rockies and the northern Plains after winter ...

Parts of the United States are experiencing the 10th and coldest polar vortex event this season. Weather forces in the Arctic ...

The polar vortex has taken on an unexpected pattern this winter - one that’s made part of the United States the most ...

BISMARCK, North Dakota — More than 95 million people in the United States were facing numbing cold on Tuesday as a polar ...

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

According to the Severe Weather Europe website—an online resource of global weather forecasts—a mass of cold air, spurred by the polar vortex, has been forecast to move over Canada and the northern ...

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

The polar vortex hit its peak across much of America ... globe's surface — has been in an extended freeze, the rest of the world hasn't. The entire Earth on Monday was 0.8 degrees (0.45 degrees ...

SCOTT OLSON/GETTY IMAGES BISMARCK, North Dakota — More than 95 million people in the United States were facing numbing cold on Tuesday as a polar vortex sent temperatures plunging to record ...

The easy answer is a deep southward dip in the polar jet stream that typically rings the globe at higher latitudes but is known to create havoc when it wobbles out of its normal c ...