The most potent blast will enter the north-central U.S. on Friday, the National Weather Service warned, before roaring across much of the rest of the nation over the weekend. Arctic air will ...

However, a deep freeze, thanks to the polar vortex dipping down from Siberia, is about to bring even harsher arctic blast to nearly 300 million Americans starting this weekend. Maps show where and ...

A brutally cold air mass will be plummeting south from the Arctic through the weekend and into early next week. Next week’s blast will likely be one day shorter than that of 2019. Still ...

That's because an Arctic blast is forecast to sweep down through Canada and blow through the Rockies on its way to the East Coast. In some places, temperatures could plunge as low as minus 30 ...