A strong polar vortex doesn't cause cold weather — it does the opposite. Here's what to know about polar vortices, how they ...

A polar vortex broke, and severe temperatures are set to dominate most of the United States, including the Midwest, in the ...

The coldest air of the early winter season is blasting the eastern U.S. on Monday, with single-digit temperatures with ...

Another round of bone-chilling air from the Polar Vortex is expected to invade the central and northeastern U.S. this weekend ...

Another brutally cold weekend is on the way as a piece of the Polar vortex dips out of the Arctic Circle, sending frigid air ...

As we head into the polar vortex, meteorologists are calling for up to a foot of snow in some parts of the U.S.

In yet another sign that winter weather is either here or will be soon, the dreaded polar vortex is making news yet again. Its potential arrival in the United States over the next few weeks is cause ...

The planet's most extreme cold air will be barreling into the central and eastern United States this coming weekend "like a ...

A Polar Vortex brought temperatures so cold in January 2014 that it froze Niagara Falls. Signals of a rare sudden stratospheric warming in the next two weeks have some forecasting an imminent Arctic ...

High above the North Pole, in a slice of atmosphere rarely noticed and even less understood, a transformation is underway. Over the next 10 days, changes in the stratosphere will upend weather ...

The seed money for new specialized investment accounts for kids is growing — and now the hope is for an even bigger bloom. Tech billionaire Michael Dell and his wife, Susan, announced a pledge Tuesday ...