Jul 14, 2023
Isolated storms developed in an area where dewpoints in the low to mid 70s pooled. There was some weak surface convergence, ML CAPEs over 2000 J/kg, and steep low-level lapse rates, so there were some localized damaging microbursts with the severe storms. An area of storms over northern St. Clair County in Illinois produced up to 5 inches of rain in about a two hour period with some reports of flash flooding.
Source: NOAA National Weather Service Storm Events Database (event 1128523). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in St. Clair County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.