An unusually strong disruption in the upper atmosphere is setting the stage for a winter pattern that could lock much of the ...

This weather event may not be constant, but there will be cold waves over multiple days with single-day warmups mixed in.

A disturbance in the polar vortex could spill icy cold air south into the United States much earlier than usual, the National ...

A highly unusual disruption of the polar vortex is taking shape in the upper atmosphere this November, raising the odds of a ...

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

But across the country, AccuWeather meteorologists are predicting major travel disruptions as a storm system is set to batter ...

But across the country, AccuWeather meteorologists are predicting major travel disruptions as a storm system is set to batter ...

A sudden, dramatic shift in temperatures high in the atmosphere will dance with the La Niña weather pattern. There won't be a ...

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

Although a major winter outbreak is not guaranteed, forecasters are watching for below-average temperatures to develop in the ...

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.