Sep 5, 2018
Episodes of heavy rainfall of about 5 to 15 inches over a 10 day period in much of northeast Iowa caused the Iowa River to rise above major flood stage at Marengo, about two to three days after the end of the heavy rain events. The extended duration between the forecast and actual major river flooding allowed preparations to preclude major damage downstream.
Source: NOAA National Weather Service Storm Events Database (event 786926). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Iowa County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.