Jun 18, 2018
A meandering boundary found itself draped across Iowa on the 18th and into the 19th of June, acting as a continued focusing mechanism for showers and thunderstorms. A weakly sheared environment took away form the potential for sustained severe weather, however with as much as 3000 to 4000 J/kg MUCAPE during the afternoon and early evening, opportunities for at least brief severe storms were possible. More concerning though was the heavy rainfall potential with the near stationary boundary, surf
Source: NOAA National Weather Service Storm Events Database (event 765371). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Sac County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.