Aug 4, 2007
A very unstable airmass was in place over Iowa during the evening of the 4th. CAPE values were in the 2000 to 4000 J/kg range with lifted indices around -6. A warm front extended from low pressure over northwest Iowa, southeast into the south east sections of the state. On the warm side, highs reached the low to mid 90s, with dew points in the low 70s. Just north of the front, highs were in the 80s with dew points in the low to mid 70s. Thunderstorms erupted during the evening, mainly along
Source: NOAA National Weather Service Storm Events Database (event 38228). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Calhoun County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.