May 16, 2018
In an environment with weak winds aloft, an isolated thunderstorm developed over eastern sections of Allegheny county. This produced significant flash flooding along Route 51 and the Baldwin area. Numerous roads were closed with a video of a dumpster floating down State Route 51. Rainfall amounts ranged from 2.43 in Mount Oliver to a trace at Pittsburgh International Airport.
Source: NOAA National Weather Service Storm Events Database (event 761240). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Westmoreland County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.