Preparations are underway from Houston to Atlanta as a rare winter storm sets its sights on the southern U.S., where it's expected to bring a messy mix of heavy snow, sleet and freezing rain that could have a major impact on travel and daily life.

EST an updated winter weather advisory was issued by the National Weather Service in effect until 7 p.m. EST for Emmet, Cheboygan, Leelanau, Otsego, Benzie, Manistee and Charlevoix counties.