Jul 27, 2011
Hot and humid conditions prevailed across the region July 27, as a warm front lifted northward into northeast Iowa. Showers and thunderstorms developed along the Highway 20 corridor in Dubuque, Jo Daviess and Stephenson Counties during the early evening hours of July 27. They continued to redevelop and move over the same areas for about 18 hours. Record-setting rainfall totals of 7 to 15 inches resulted in flash flooding of much of the area. The Mississippi River at Dubuque, IA even rose abo
Source: NOAA National Weather Service Storm Events Database (event 332697). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Stephenson County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.