Jun 11, 2004
A very unstable situation took shape over Iowa during the day on the 11th. A nearly stationary frontal boundary extended nearly east to west across the state along U.S. Highway 20, or roughly from Fort Dodge to Waterloo. Very unstable air was to the south of the front with dew point temperatures in the low to mid 70s common. By early afternoon, CAPE values were near 5000 J/KG with lifted indices in the -10 to -12 C. range. A dry line advanced east toward the state along with the passage of a
Source: NOAA National Weather Service Storm Events Database (event 5405226). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Kossuth County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.