Event narrative (NOAA)
Torrential rainfall of 4.00 to 8.00 inches resulted in damage to thousands of houses and businesses in the county, including several in the cities of Galesburg and Knoxville. Every creek and stream in the county was flooded. Nearly every road in the county was impassable, and several water rescues were made. This rainfall lead to record or near record flooding on the Spoon River from April 18th through the 24th.
Other notable flash flood events in Illinois
Source: NOAA/NCEI Storm Events Database. Deaths and injuries are those NOAA classifies as direct. Damage is the reporting office's estimate at the time and is not inflation-adjusted. This is a catalogue record, not a forecast.