Jul 28, 1999
On July 28th, thunderstorms produced a macroburst which blew across portions of Western Pennsylvania. the macroburst started at around 9 AM EST and marched across the region through the late morning hours. The thunderstorms first started in west-central Lawrence County and moved southeast at about 30 to 35 MPH into northeast Beaver County. An additional storm developed in northeast Beaver County and merged with the first storm in the northwestern part of the county. Together they combined int
Source: NOAA National Weather Service Storm Events Database (event 5716047). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Mercer County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.