May 3, 2012
An upper low moving over a warm front that stretched across northern Lower Michigan set the stage for heavy rainfall on May 3rd. Training thunderstorms (storms that move over the same location) produced 5 to 7 inches of rainfall across portions of Mason and Lake counties. The heavy rainfall resulted in roads that were either flooded or washed out. As the day progressed, strong to severe storms developed in the warm humid airmass. Golf ball size hail was reported in Mason and a 10 x 20 foot sect
Source: NOAA National Weather Service Storm Events Database (event 369042). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Osceola County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.