May 7, 2009
Scattered thunderstorms developed across the north and eastern portions of the area during the afternoon of the 7th. An isolated severe thunderstorm produced a bit of penny sized hail, just east of Winona, and also produced some flash flooding where a portion of a road was washed out.
Source: NOAA National Weather Service Storm Events Database (event 173866). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Montgomery County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.