Forecasters say freezing temperatures could shatter cold-weather records in as many as 300 locations, even in parts of the Deep South.
Commuters walk in the snow as a winter weather advisory is issued for the Chicago area on Monday, Nov. 11, 2019, in Chicago. (Rich Hein/Chicago Sun-Times via AP)
More than 70 million people could see accumulating snow from Colorado to Maine, says CNN meteorologist Dave Hennen. Winter warnings or advisories stretch from the Midwest to New England.
A vigorous cold air outbreak is usually a midwinter, not late fall, phenomenon.
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