A major weather pattern change underway across U.S. As we get into next week, the storm track looks really interesting.

A winter buzzword, explained.

What is the polar vortex? This article explains what a polar vortex is in simple terms, how it influences winter weather in the U.S., and why meteorologists talk about it during major cold events.

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.

The meteorologists said the polar vortex system is set up due north of Michigan over Canada's Hudson Bay. It's at least partly responsible for the frigid temperatures around the region that ...

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

The North Pole is surrounded by a massive circular upper-air weather phenomenon in the Arctic called the polar vortex. It is ...

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 ...

A sudden stratospheric warming event reversed the winds that make up the northern polar vortex on March 9. A new animation shows the vortex also moved away from the Arctic towards Europe. When you ...

Alabama braces for another polar vortex blast bringing well below freezing temperatures. How cold will temperatures get? Here's what to know.

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