15 Michigan counties under a freeze warning until Monday midday – temperatures could sink to 23

At 1:45 a.m. EDT on Sunday, the National Weather Service issued a freeze warning valid from 11 p.m. EDT until Monday 11 a.m. EDT for Muskegon, Montcalm, Gratiot, Ottawa, Kent, Ionia, Clinton, Allegan, Barry, Eaton, Ingham, Van Buren, Kalamazoo, Calhoun and Jackson counties.