Apr 25, 2008
A strong push of moist and unstable air moved into Iowa during the day on the 24th. Surface temperatures warmed into the low to mid 70s over much of western and southern Iowa with dew point temperatures in the low to mid 60s. A cold front approached the state from the northwest during the evening. The airmass was quite unstable with surface based lifted indices around -4 C. and most unstable CAPE around 2000 J/kg. The shear was not real strong, but there was 30 to 40 kts of effective shear a
Source: NOAA National Weather Service Storm Events Database (event 83946). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Grundy County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.