Jun 17, 2011
Thunderstorms initiated along an old outflow boundary extending from Jacksonville to near Lawrenceville during the evening of June 17th. Due to a strong low-level jet flowing into the area, the storms continually re-developed and tracked across the same locations, producing between 5 and 10 inches of rain across parts of Morgan and western Sangamon counties through the morning of June 18th. As a result, widespread flash flooding occurred from the Jacksonville area eastward to the Sangamon Coun
Source: NOAA National Weather Service Storm Events Database (event 328579). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Sangamon County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.