Jun 30, 2020
Large clusters of thunderstorms during the early morning hours produced locally excessive rainfall. The storms occurred ahead of a very compact disturbance in the upper levels of the atmosphere over areas of far west central Illinois. A shortwave trough axis extended south from the disturbance. The air mass across the region was very moist, with precipitable water values around 2 inches. There was also a pool of moderate to strong instability over central and western Missouri that advanced north
Source: NOAA National Weather Service Storm Events Database (event 899121). 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.