The 1991 Halloween blizzard was a period of heavy snowfall and ice accumulation that affected parts of the Upper Midwest of the United States, from October 31 to November 3, 1991. Over the last week of October 1991 a large storm system over the Atlantic Ocean (1991 Perfect Storm) blocked most of the weather patterns over the eastern half of the United States, and in turn moisture from the Gulf of Mexico was funneled straight northward over the affected region. By the time the precipitation stopped falling many cities in the eastern half of Minnesota and northwestern Wisconsin had witnessed record early-season snowfall accumulations, while parts of southern Minnesota and northern Iowa were crippled by a large ice storm. Arctic air that was pulled southward behind the storm had combined with