May 21, 2024
Troughing over the western CONUS brought southwesterly flow aloft over the central and northern Plains for the duration of this event. In the couple of days leading up to May 21st, the upper-level flow pattern amplified as a trough deepened over the northern Rockies. This trough then ejected out into the central Plains on the 21st. At the surface, a stationary front developed and stretched across central Nebraska and southern Iowa by the evening of the 19th. Elevated convection that morning nort
Source: NOAA National Weather Service Storm Events Database (event 1181065). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Pottawattamie County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.