High above the North Pole, in a slice of atmosphere rarely noticed and even less understood, a transformation is underway.

The phrase "polar vortex" has captured public attention and is now often misused to describe short-term bouts of frigid weather.

The phenomenon, known as a sudden stratospheric warming, it's "the largest type of disruption that occurs to the polar vortex ...

The phenomenon, known as a sudden stratospheric warming, it's "the largest type of disruption that occurs to the polar vortex ...

The cold temperatures — which might not reach Long Island — would be caused by a disruption in the polar vortex above the ...

Temperatures could turn colder in Connecticut after Thanksgiving thanks to sudden stratospheric warming. Here's what that ...

NBC 5 Storm Team Meteorologist Kevin Jeanes took a look at what’s going on and what the weather may look like going into ...

The tropospheric polar vortex is a normal feature that influences weather across the globe every winter, while the ...

National Oceanic and Atmospheric Administration data shows snow has already appeared across much of the northern U.S. and the ...

But the forecast from the National Weather Service says we’re not due for truly chilling temperatures yet. “Our recent bout of very windy and cold conditions (Sunday) will transition into gradually ...

Another Arctic blast is on the move toward the U.S., bringing the potential for bitter cold and heavy snow accumulations to ...