Aug 12, 2025
A pre-frontal trough interacting with a seasonably warm and moist airmass triggered a couple bands of thunderstorms across central Illinois during the afternoon and evening of August 12th. One of the strongest cells produced excessive rainfall rates and caused isolated flash flooding in Decatur in Macon County.
Source: NOAA National Weather Service Storm Events Database (event 1289042). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in MacOn County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.