The local paper claimed Superior completely froze in 1996, so if it ain’t completely froze it can’t even tie a record for cover - maybe the speed at which it occurred though.
http://www.twincities.com/localnews/ci_25080492/lake-superior-nearing-rare-ice-over?source=hottopics
I think they are working on “record for this date,” so it is possible to have a record on this day that doesn’t equal a record on another. day.