Aug 20, 1998
Iowa was covered by a very unstable and moist airmass. Precipitable water values were in excess of 2 inches with surface dew point temperatures in the mid 70s F. to the low 80s over all of the state. By afternoon, temperatures had risen into the low to mid 90s in most of the south two thirds of Iowa. This combination produced CAPE values in excess of 6000 J/Kg over the west half of Iowa. A cold front was located to the northwest of the state during the day. It sank southeast during the la
Source: NOAA National Weather Service Storm Events Database (event 5657409). 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.