Much below normal temperatures should persist across the eastern U.S. into early February before moderating slightly.

The polar vortex will keep the freezer door wide open during much of Feburary, which will not only keep energy demands and the cost of heating homes and businesses high, but more winter storms will ...

Deep penetration of cold temperatures and a coastal storm will bring bomb cyclone and polar vortex into your newsfeeds.

What is the polar vortex? Mississippi weekend weather forecast calls for winter storm with lows in the teens, paired with ...

The west half of the country, including the Midwest, will start to warm up. But that won't be the case for the East Coast.

A collapse in the polar vortex is letting Artic air come here. What that means, and why it happens.

Starting Thursday, dangerously frigid air from Siberia and the North Pole is forecast to plunge the Great Lakes region into ...

Meteorologist Sven Sundgaard predicted this wacky winter weather back in October, and he explains what's happening now and what might happen next.

A dramatic blast of cold air may be coming for the United States in late January, courtesy of the polar vortex. Here's what ...

Temperatures could fall below -20 F across certain parts of North Dakota and Minnesota.

A major polar vortex is about to hit the US and could bring weeks of frigid temperatures for millions, with even a chance of ...

Year-round, severe, Artic air is usually kept tightly contained in the North Pole. Arctic wind patterns create a sort of wall ...