Flash Flood Warning issued September 12 at 4:27PM EDT until September 12 at 6:30PM EDT by NWS Pittsburgh PA

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At 427 PM EDT, emergency management reported flash flooding across
the warned area. Between 1 and 2.5 inches of rain have fallen.
Additional rainfall amounts of 0.5 to 1 inch are possible in the
warned area. Flash flooding is already occurring.

HAZARD...Life threatening flash flooding. Heavy rain producing flash
flooding.

SOURCE...Emergency management reported.

IMPACT...Life threatening flash flooding of creeks and streams, urban
areas, highways, streets and underpasses.

Some locations that will experience flash flooding include...
Mount Lebanon, Bethel Park, McMurray, Washington, Canonsburg,
Gastonville, Baldwin, Upper St. Clair, Scott Township, Whitehall,
South Park Township, Cecil-Bishop, Jefferson Hills, Castle Shannon,
Pleasant Hills, Bridgeville, Wolfdale, McGovern and East
Washington.