Jun 23, 2000
Another round of convection developed over Iowa during the afternoon hours as warm and unstable air was drawn north over the top of the outflow boundary left behind from convection during the mid day hours. Very heavy rain fell along the arc of the outflow boundary. Severe weather was very limited with this event. One of the cells became severe over southwest Iowa over Cass County. The storm dropped one inch diameter hail on the town of Massena. This cell was the same cell the a short time
Source: NOAA National Weather Service Storm Events Database (event 5148307). 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.