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US to get 10th and 'most severe' polar vortex as arctic blast plunges most of country into 'extreme cold'
The US is preparing for its 10th cold snap caused by the polar vortex this season as meteorologists warn it could be the ...
Very cold weather is coming. US about to get 10th and chilliest polar vortex this winter
Every state but Hawaii, California and Florida is likely to get a taste of wind chills of 20 degrees or colder.
Polar vortex will bring frigid air back to many states after weekend storm
After a winter storm this weekend, the polar vortex will return, bringing subzero temperatures to around 80 million people ...