This wasn’t even the biggest weather event of Halloween 1991. The “Perfect Storm” was occurring in New England at this time, but due to that storm there was a blocking pattern going on throughout the United States, thus a storm in the middle of the country could not move east. So it moved north from near Houston to Burlington IA and it deepened to 996mb. It would go on to produce over 2 feet of snow in the Twin Cities, and terrible ice storms in Iowa before it switched to snow a day or so later producing up to a foot in some areas of the state. Numerous records were broken for earliest snowfall, most snow from one storm, most snow in October etc. Roads were closed and power was out to many in the effected areas and damage totaled 100 million dollars.
Halloween 1991
Halloween Blizzard article on Wikipedia