@cvanberkum. Your question is certainly à propos today as there is a winter storm in the midwest as I write this.

I was at Mayo Clinic in Rochester in late December when a blizzard warning was issued for that day. We found out that Mayo Clinic already has plans in place for weather emergencies. The hotel where we were staying was booked that night by the Neurology Dept. for their physicians, nurses and staff so that they could stay in Rochester and get to work. We found out that this happens all over Mayo Clinic and that the downtown hotels fill up during these weather emergencies. I think it's reasonable to expect that appointments could be cancelled but Mayo Clinic makes a huge effort to keep their staff in town in the event of bad weather.