NORFOLK, Va. — The plunging polar vortex brought subfreezing temperatures Tuesday to some of the southernmost points of the U.S., threatening to dump snow on parts of Texas and Oklahoma in the ...

These conditions are all thanks to a familiar sounding occurrence: the polar vortex, a large area of low pressure and cold air that surrounds the Earth's poles.

A 'polar vortex collapse' is set to plunge the United States back into the frigid weather much of the country suffered through in February.

The polar vortex readies to dump snow on Texas and its neighbors The cold snap coincided with rare January wildfires that were tearing through the Los Angeles area.

Temperatures are expected to plummet over the weekend, bringing life-threatening conditions to large stretches of the United States. The polar vortex will send temperatures below freezing for much … ...

Chain reaction could unleash cold polar vortex across United States through April Don't put away those coats just yet, weather forecasters tell North Americans ...

The Eagles and Los Angeles Rams could play in some snow in Philadelphia on Sunday, early forecasts show. And in bitterly-cold Buffalo, the Baltimore Ravens and Bills will fight for a spot in the ...

The cold snap coincided with rare January wildfires that were tearing through the Los Angeles area on Wednesday, forcing residents to flee from burning homes through flames, ferocious winds and ...

An area stretching from Texas to Tennessee braced Wednesday for the possible arrival of freezing rain and snow even as some other parts of the U.S. hit by the plunging polar vortex this week began ...

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

These conditions are all thanks to a familiar sounding occurrence: the polar vortex, a large area of low pressure and cold air that surrounds the Earth's poles.