As the U.S. prepares to take on another bout of cold weather, the term "polar vortex" is getting thrown around. But what is ...

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Much of the nation east of the Rocky Mountains is hunkered down for what could be the worst winter storm of the season.

A polar vortex is set to bring weeks of icy temperatures to the Lower Hudson Valley and New York City. “This could end up being the coldest January since 2011 for the U.S. as a whole,” said ...

Much of the country will be hit with extreme low temperatures over the next week as a polar vortex sends cold air down from the North Pole. Real feel temperatures throughout the northeast, including ...