Pretty sure it was civilian. West from a Green Bay-ish direction heading mostly in an East direction that slowly, repeated adjustments by small degrees to a more North East direction as it went somewhere out over the lake (North of Algoma/South of Sturgeon Bay) in a sort of Travers City direction before we couldnt see it anymore. I suppose that from that position on this side of the lake then, if it could have corrected straight East then flown over Travers to Grayling.
Appeared to be mostly white with some red and blue on it. Im not someone who would know all the present color schemes of civilian organizations. If I were to blame it on someone I would say it may have been some division of American Airlines.
That would seem to make sense if it was American and if it was going straight North on a path West of here as Im pretty sure they still have their maintenance hub at Gwinn, Michigan but then they shouldnt be this far East and apparently flying further East.
Might have been a regional airline operating Wisconsin to Traverse City. For all of your aircraft flight info commercial and Military, I trust milspec ops monkey. Crazy name good info. He is on the interwebs.