Jun 23, 2010
A very unstable airmass was in place over Iowa during the late afternoon and evening of the 22nd. Surface temperatures warmed into the upper 80s to low 90s over much of the state with dew point temperatures rising into the mid 70s to low 80s. CAPE values increased to over 6000 J/kg over the southern half of the state with lifted indices around -12 C. Deep moisture flowed into the state both at low levels as well with the presence of a prominent tropical feed on the water vapor satellite image
Source: NOAA National Weather Service Storm Events Database (event 226376). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Palo Alto County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.