Sep 16, 2016
As an upper level storm system moved into the northern Plains, a warm front retreated through eastern Nebraska and western Iowa during the afternoon. Unseasonably warm and humid air lifted into the region creating marginal instability by mid afternoon, but with the warm front in the area environmental shear was strong. Thunderstorms developed across northeast and east-central Nebraska by mid afternoon. Initially isolated supercells were the dominate mode with large hail the main threat. A small
Source: NOAA National Weather Service Storm Events Database (event 661095). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Monona County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.