I remember that 1991 storm as I was at MTU (Mich. Tech) during that event ... it was a big miss for the UP.
I was also visiting my cousin around the Twin Cities during the Dec 1982 event. That was a major storm with over waste deep snow where we were (reports from were we were staying were over 2') and there were 4'-5' drifts that we made snowforts then connected them all by tunnels. Wisconsin had a major ice storm that took several days to clean up with many closed roads. We left 2 days after the storm to go home (SE Mich) and there were still major traffic issues in parts of MN and WI.