Oct 9, 2018
Tornadoes made an October appearance along with other strong storms and heavy rainfall as a number of conditions came together. A frontal boundary stalled out across Iowa, situated from southwest to northeast, roughly cutting the state in half. Dew points were on the high side given the time of the year, in the upper 60s to low 70s, yielding low lifted condensation levels. In addition, low level turning resulted in 0-1km SRH values of 100-200+ m2/s2 within an environment of 1000+ J/kg SBCAPE. Wi
Source: NOAA National Weather Service Storm Events Database (event 789935). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Poweshiek County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.