Apr 30, 2017
Significant flooding developed after two thunderstorm complexes crossed southern Illinois, bringing 72-hour rainfall totals to nearly one foot in isolated locations. A large complex of thunderstorms moved southeast across southern Illinois during the evening hours of the 29th. These storms occurred near a surface cold front which sagged southward across southern Illinois during the evening. During the overnight hours through the early morning of the 30th, an even larger complex of thunderstorms
Source: NOAA National Weather Service Storm Events Database (event 689583). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Hamilton County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.