For a few days, it sounded like a scene from a disaster movie: a “piece” of the sun appeared to shear away from its surface and whirl around the north pole, leaving even seasoned solar physicists ...

Over the years cold weather events have all been connected to the surface effects of sudden stratospheric warming ...

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

A rare weather phenomenon that hasn't occurred since 1968 is expected to plunge temperatures across parts of the United States.

As we look toward mid-December into January, the door is opening for some potentially significant winter weather.

A polar vortex — a large area of low pressure — is heading south from the Arctic, bringing with it cold weather across many ...

A combination of weather conditions may make it colder than usual across parts of the Central and Northern U.S. next week.

Thanksgiving is this Thursday, Nov. 27, and there is a good possibility of some rain and snow across the region. The holiday has been observed every fourth Thursday since 1942, so has been as early as ...

Early-season stratospheric warming events spark hype around frigid temperatures. Learn the myths and the science about the ...

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

This winter will be marked by a La Niña event, warmer North Pacific waters, and an undulating polar vortex where cold air ...

A significant change in the atmosphere means the weeks after Thanksgiving could be colder and snowier than normal across ...