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

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

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

A severe winter storm that brought crippling freezing rain, sleet and snow to a large part of the U.S. in late January 2026 ...

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

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

It exists all the time, but it usually gets stronger in winter. When the jet stream (a river of wind) bends and dips south, ...

After this weekend's snow storm moves out, cold Arctic air will move in.

Alabama braces for another polar vortex blast bringing well below freezing temperatures. How cold will temperatures get? Here ...

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 ...