Sep 12, 2019
Spurred by a period of excessive precipitation from September 10-12 that resulted in 5 to 10 inches of rainfall near the South Dakota border and 2 to 5 inches toward the east, extreme rises occurred on numerous creeks and rivers mid-month, with many basin locations reaching major to record stages.
Source: NOAA National Weather Service Storm Events Database (event 856700). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Rock County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.