Friday’s flash floods pass; more -- but scattered -- rain forecast for weekend

August 20, 2018

About an inch-and-a-half of rain in a hour caused scattered flooding in parts of Allegheny and Westmoreland counties Friday but a flash flood warning for southeastern Allegheny County was lifted at 8 p.m., the National Weather Service in Moon Township said.

Rain caused flash flooding in numerous communities including Pleasant Hills, Jefferson Hills, South Park Township and Elizabeth, according to NWS meteorologist Fred McMullen.

Westmoreland and Beaver counties also received limited flooding.

Rainfall totals included a shade over 3 inches in Lincoln Borough.

An area from Heidelburg, Bridgeville and Castle Shannon south to Murry Hill, McMurray and Libary were in danger of flooding until at least 8 p.m., the NWS posted.

Bethel Park, Upper St. Clair and Castle Shannon were also in the flash flood warning area.

At 4 p.m., Allegheny County’s problem areas included Becks Run Road at Brownsville Road in Pittsburgh, where 2 to 3 feet of water was at the intersection.

Flooding was also reported at Happy Hollow Road in Elizabeth Township and Long Acre Drive to Scenery Drive.

Earlier there was a report of a vehicle stranded in flood water on the 1000 block of Cochran Mill Road in South Park.

As the day went on, there was some progress.

The 4800 block of Streets Run Road reopened in Baldwin Borough as did Route 51 at Lewis Run Road in Pleasant Hills.

Friday evening should be rain free but there will be some rain this weekend, McMullen said.

“It won’t be a washout, but bring the umbrella,” he said. “The rain will be hit or miss.”

At 6:20 p.m., Duquesne Light reported about 560 customers without service. Most were in Forest Hills, Ohio Township, and Pleasant Hills.

West Penn Power had more than 660 customers with outages. Most outages were in Sewickley and South Huntingdon townships.

By 8:50 p.m., Duquesne Light reported only 18 customers were without power and West Penn Power was reporting 63.

Update hourly