UPDATE (6 p.m.)
A flash flood watch will be in effect through Friday night for much of western Pennsylvania.
Overnight showers and a few storms could produce moderate to heavy rain for the morning commute.
Expect delays and possible ponding of water on roads.
There is still the risk of a few showers and an isolated strong storm during the day Friday.
The system will then move out and more comfortable conditions will move in for the weekend.
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UPDATE (9:30 a.m.): A flash flood watch is in effect through Friday night for much of western Pennsylvania, including Allegheny, Beaver, Butler, Fayette, Greene, Lawrence, Venango, Washington and Westmoreland counties.
FLASH FLOOD WATCH through tonight for shaded counties.— Scott Harbaugh (@WPXIScott) July 13, 2017
Repeated rounds of heavy rain through tonight. pic.twitter.com/FsdG8kBHLi
UPDATE (9 a.m.): A flood advisory has been issued for northeastern Mercer County and southwestern Venango County until 11:45 a.m.
Watch for flooding along and north of I-80. Tracking repeated rounds of heavy rain now on Channel 11 Morning News. pic.twitter.com/WbnL6WSpQR— Scott Harbaugh (@WPXIScott) July 13, 2017
Some of the strong storms will bring 40-plus-mph wind gusts and frequent lightning. Be aware: If you hear thunder, head indoors. Heavy rain and strong storms will taper off after sunset tonight.
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