The National Weather Service is releasing data on just how much snow fell during the massive winter storm that sweep across the state this week. South Haven, on the coast of Lake Michigan, saw 20 inches of snow on the ground. That's the largest snowfall so far reported, according to the Associated Press. Muskegon got 19.7 inches. A foot of snow fell in the Lansing area. Flint got 10 inches, Detroit got 8.7 inches.