What is the polar vortex? This article explains what a polar vortex is in simple terms, how it influences winter weather in ...

The bitter cold temperatures that have left a chill over the eastern half of the country aren’t going anywhere, as a major disruption to the Polar Vortex is coming this month.

Over the course of this winter season, we've seen several instances of dramatically plummeting temperatures with wind chills nose-diving deep into the negatives.

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

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.

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

The big winter (and popular) topic is dusted off very early this season as frigid air plunges south next weekend. But what is ...

When the polar vortex breaks, Artic air come south. Here's what to know right now.

The meteorologists said the polar vortex system is set up due north of Michigan over Canada's Hudson Bay. It's at least ...

A severe winter storm that brought freezing rain, sleet and snow to a large part of the U.S. was intensified by the polar ...

Much of the country will be hit with extreme low temperatures over the next week as a polar vortex sends cold air down from the North Pole. Real feel temperatures throughout the northeast, including ...

The bitter cold temperatures that have left a chill over the eastern half of the country aren't going anywhere, as a major ...