Over the next 10 days, scientists say, changes in the stratosphere will upend weather patterns and set the stage for a cold, snowy December across parts of the Northern Hemisphere.

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

A blast of polar vortex cold air is expected to hit parts of the country around Thanksgiving. What to expect in Tennessee.

A sudden stratospheric warming could soon disturb the polar vortex, causing frigid air to spill from the North Pole to North ...

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

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