Jun 14, 2011
A warm front remained in place to the south of Iowa during the overnight hours of the 13th into the morning of the 14th. The airmass was very unstable to the south of the front with CAPE around 3500 J/kg and lifted indices of -7 to -9 C. The atmosphere was moderately sheared with 35 to 50 kts of shear available. CAPE in the -10 to -30 C layer of the atmosphere was between 500 and 800 J/kg. Downdraft CAPE was just under 1000 J/jg. Thunderstorms formed over southern Iowa as the low level jet
Source: NOAA National Weather Service Storm Events Database (event 299511). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Mahaska County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.