Jul 11, 2021
Waves of low pressure tracking along a nearly stationary frontal boundary draped across south-central Illinois triggered numerous thunderstorms during the afternoon and evening of July 11th. Some of the storms dropped locally heavy rainfall, with as much as 3.77 being reported in Mount Pulaski in southern Logan County. Due to excessive rainfall rates and already moist soil conditions, flash flooding occurred in a few locations...particularly across portions of Sangamon, Logan, and Vermilion co
Source: NOAA National Weather Service Storm Events Database (event 966041). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Logan County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.