Jul 18, 2007
Weak, but persistent warm air advection moved into the region extending from eastern Iowa into northern Indiana. Extreme instability developed to the west across Illinois where CAPEs exceeded 5000 j/kg and LI's reached -10 C. As the instability advected east along this area of isentropic lift, thunderstorms rapidly developed. Due to the slow movement of these storms as well as precipitable water values at or above 2 inches, widepsread heavy rain was observed in many locations. With northwest flo
Source: NOAA National Weather Service Storm Events Database (event 34856). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in St. Joseph County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.