The National Weather Service issued a weather alert at 9:40 p.m. EST on Friday for dense fog until Saturday at 4 a.m. EST for Emmet, Cheboygan, Presque Isle, Leelanau, Antrim, Otsego, Montmorency, Alpena, Benzie, Grand Traverse, Kalkaska, Crawford, Oscoda, Alcona, Manistee, Wexford, Missaukee, Roscommon, Ogemaw, Iosco, Gladwin, Arenac, Chippewa, Mackinac and Charlevoix counties.