Oceana, Mason counties under severe thunderstorm warning The National Weather Service in Grand Rapids issued a severe thunderstorm warning Wednesday, July 26, until 10:45 a.m. for southern Mason County and northern Oceana County. “At 9:55 a.m. EDT, severe thunderstorms were located along a line extending from 12 miles southwest of Ludington State Park to 10 miles west of Charles Mears…