Pedestrians walk through falling snow in New York City Sunday.
Mandatory Credit: Anthony Behar/Sipa USA/AP via CNN Newsource
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Potentially historic storm could drop rare snow on Florida and the Gulf of Mexico as temperatures plunge nationwide
More than 230 million people across the United States are facing dangerous cold that will also open the door for a potentially historic and crippling winter storm that could deliver snow as far south as Florida and the Gulf of Mexico.
