Polar vortexes on a warming planet might sound counterintuitive, but there's a scientific reason.

A polar vortex is currently hitting the United States, with schools closed in many areas and at least four deaths caused by ...

The polar vortex of ultra-cold air usually spins around the North Pole, but it sometimes plunges south into the US, Europe ...

Temperatures plunged into the teens and single digits in some spots, and the snow-dusted winds are driving the wind chill ...

In Indiana, the National Guard was activated to help stranded motorists. The storm was expected to reach the Mid-Atlantic ...

The United States continued to freeze through a polar vortex that brought rare cold to the southern United States and chances ...

People in the U.S., Europe and Asia experience the polar vortex's intense cold when it escapes the North Pole and plunges ...

Portland was forecasted to be about 6 degrees below normal Sunday and Monday, according to the National Weather Service.

It's a term you hear every couple of winters, when we get stuck in the coldest of cold patterns – polar vortex. But what exactly is it?

The polar vortex is a low-pressure system of cold air that swirls above Earth’s poles. There’s one over the South Pole in ...

Parts of all states in the lower 48 woke up to subfreezing temperatures Tuesday due to a weather pattern that will keep ...