Jun 9, 1999
The first two weeks of June saw a continuation of the pattern that persisted through much of May with heavy rains across most of the Des Moines HSA during the period. These rains were primarily due to meso scale forcing in the very humid airmass that persisted across the central Plains during the first half of the month. Heavy rainfall during the afternoon and evening of June 8 fell over northeast parts of the HSA as a very moist and unstable airmass combined with several weak outflow boundar
Source: NOAA National Weather Service Storm Events Database (event 5699280). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Mahaska County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.