Jun 30, 2014
An unseasonably strong mid and upper level jet combined with high amounts of low level moisture and instability to create a volatile atmosphere across eastern Nebraska and western Iowa late in the night and into Monday morning. Thunderstorms developed on the nose of the low-level jet and quickly became severe. Isolated to scattered supercells moved across northeast Nebraska and western Iowa through late morning before exiting into central Iowa.
Source: NOAA National Weather Service Storm Events Database (event 530697). 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.