Aug 4, 2010
A very moist airmass remained in place over Iowa. Precipitable water values were near 2.25 inches when a wave of low pressure moved northeast along a stalled front to the south of the state. Thunderstorms enhanced with a narrow line of intense storms setting up across parts of Dallas County into Polk County. Thunderstorm development was quite rapid and formed on the north edge of a decaying MCS to the southwest. Additional heavy storms developed and produced heavy rainfall over Story County.
Source: NOAA National Weather Service Storm Events Database (event 238408). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Dallas County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.