Aug 25, 2023
Strong thunderstorms developed along a cold front across the Central and Lower Great Lakes during the late evening and overnight hours of August 24-25, 2023. These thunderstorms were in an environment of strong to extreme instability, along with sufficient low-level and deep-layer wind shear for organized and rotating thunderstorms. This allowed storms that developed over Michigan to organize into a fast-moving cluster of thunderstorms that produced extensive wind damage and a number of tornadoe
Source: NOAA National Weather Service Storm Events Database (event 1119304). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Allegheny County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.