 Winds were officially estimated to be at least 100 km/h (60 mph) but unofficial readings exceeded 120 km/h (75 mph) in Kohler.Some thought it was a tornado that hit but it was later confirmed to have been straight-line winds like most of the derecho.Significant damage was reported in the city of Manitowoc, where hundreds of trees, power poles, and signs were blown down, knocking out power to hundreds of homes.