I attended U of M from 1971 to 1975. On Sunday of Thanksgiving weekend of 1974 SE Michigan was hit with a major league blizzard. I took 3 of us 4 hours to drive from GP to Ann Arbor and we only had a 12 pack of beer for the ride [[SOP in those days). When we finally got back to Ann Arbor it was deserted. The next day U of M cancelled classes for the 1st time in the history of the school. Too few people, including professors, had made it back in time for Monday classes.