The kinda heart-shaped one east of S.E. Michigan
We were north and west of the St. Clair light the entire time. We were out from about 14:00 thru 17:00 or so (not incl. motoring time in and out of Black Creek, etc.). We never saw anything approaching 20 kts, on puffs or otherwise. The St. Clair Buoy (which I think
is the St. Clair light) said winds during that time were pretty-much steady at 12-15 kts, which is about what I would've guessed.
Before and after the sail, we were in and around the north end of Venetian. Didn't look anything like 20 kts, much less gusts to 30, then, either.