Jun 10, 2015
A cold front dropping slowly southward from the Upper Midwest interacted with a hot and humid airmass to trigger thunderstorms across north-central Illinois during the late afternoon and evening of June 10th. Damaging wind gusts of 60 to 70 mph and hail as large as golf balls were reported primarily along and north of a Canton to Minonk line. Rainfall amounts of 3.00 to 6.00 inches on already saturated ground resulted in flash flooding along the Illinois River valley, which persisted into the
Source: NOAA National Weather Service Storm Events Database (event 591371). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Knox County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.