Freezing rain expected tonight. MASON COUNTY — The National Weather Service in Grand Rapids has issued a winter weather advisory for several Michigan counties, including Mason, that takes effect at 6 p.m. Saturday, Jan. 8. In addition to Mason, impacted counties include Oceana, Lake, Osceola, Newaygo, Mecosta, Muskegon, Montcalm, Ottawa, Kent, Ionia, Allegan, Barry, Eaton, Van Buren, Kalamazoo, Calhoun and…