Resolution 7478 hazard mitigation

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2024 Hennepin County All -Jurisdiction Hazard Mitigation Plan Volume 2 — Hazard Inventory Minnesota in the last 50 years. Thanksgiving weekend Blizzard, 1985. An unusually prolonged and widespread winter storm produced several waves of heavy snow over Minnesota, Iowa, Wisconsin and the Dakotas between November 281h and December V, 1985. In the Twin Cities, at least 5 inches on three consecutive days, with each consecutive day producing more snow than the last —this behavior is unprecedented in the area's recorded history and resulted in three- day totals in excess of 20 inches. Although the snow during the first two days of the storm was very heavy, it fell in light winds as a cold air mass remained in place over the region. The final wave of snow, however, was KAN'SAS ,. MIS5OUM associated with a powerful and intensifying low +0R04 pressure system, and R0,d 10 produced a slight warm-up, followed by Snowfall pattern, From Nov 28 — Dec 1, 1985, modified from original, courtesy of strengthening winds NOAAACDC, December 1985. and rapidly falling temperatures. The large geographical reach of this storm system overwhelmed Minnesota's road networks, and many state highways and local roads became impassible and had to be closed. Thousands of travelers hoping to get into or out of Minnesota we forced to remain in place into the following work week. Halloween Blizzard, October 31— November 2,1991. A low-pressure system dove into southern Texas from eastern Colorado, picked up copious moisture from the Gulf of Mexico, and then proceeded on a north-northeast path, nearly following the central portion of the Mississippi River, before passing through Wisconsin and out over Lake Superior. This scenario and trajectory produced a historic period of heavy snow in the Twin Cities and much of eastern Minnesota, followed by intense winds and plummeting temperatures. 176