Jun 12, 2001
The supercell that moved across northern Iowa during the early morning hours left behind a strong outflow boundary. This outflow boundary became established east to west across central Iowa. At the same time a complex of thunderstorms that was generated by a short wave moving across Nebraska advanced toward western Iowa just before sunrise. Though upper level jet divergence was in place, a strong mid level cap was in place through most of the night and the outflow boundary never produced any
Source: NOAA National Weather Service Storm Events Database (event 5246401). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Boone County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.