Didn't see this one personally but I'm based in Northumberland so bit far from Lake Michigan lol. Did catch something triangular over the Northumberland coast a few years back though and I've been chasing that rabbit hole ever since.
Question for anyone who witnessed it - were the lights static or did they pulse? The one I saw had this slow rhythmic thing going on with the corner lights which I couldn't explain. Also curious whether it moved silently because thats what got me, no sound at all.
Anyone managed to get footage? Would love to compare notes on the shape especially the angles, wondering if it matches other sightings that have been logged around the great lakes area.