Jun 24, 2013
An unstable airmass was in place over Iowa with CAPE over 2000 J/kg already by early in the morning. Downdraft CAPE was quite high, in the 1000 to 1300 J/kg range, with 400 to 600 J/kg in the -10 to -30 C layer of the atmosphere. The shear was quite weak, in the 25 to 35 kt range. Deep moisture was in place with precipitable water values of 1.8 inches. The LCL was quite low as well, in the 500 to 750 meter range. There was little hail as the freezing level was quite high at 14,400 feet. St
Source: NOAA National Weather Service Storm Events Database (event 448030). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Butler County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.