Moisture from the Gulf and Mid-Atlantic was pulled northward over the region through the 29th by an upper trough over the Lower Mississippi Valley and a cut-off low off of the Southeastern U.S. coast. This brought a period of heavy rain to the region before a cold front passed on the 30th. While the antecedent conditions were dry, over 3.50 inches of rain over portions of southwestern PA caused localized flooding of roadways and basements. 3.43 inches were reported at the Pittsburgh Airport, which was a new 24 hour record on the 29th.

Heavy Rain in JEFFERSON, PENNSYLVANIA
From 29-SEP-15 18:47:00 to 29-SEP-15 18:47:00 (EST-5)
Location: PUNXSUTAWNEY
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported 3.78 inches of rainfall in 24 hours.

Heavy Rain in ALLEGHENY, PENNSYLVANIA
From 29-SEP-15 19:29:00 to 29-SEP-15 19:29:00 (EST-5)
Location: CARNOT
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

Local NWS office reported 1.52 inches since 2pm.

Heavy Rain in ALLEGHENY, PENNSYLVANIA
From 29-SEP-15 19:55:00 to 29-SEP-15 19:55:00 (EST-5)
Location: CARNEGIE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported 2.55 inches of rain so far for the day.

Heavy Rain in WESTMORELAND, PENNSYLVANIA
From 29-SEP-15 21:54:00 to 29-SEP-15 21:54:00 (EST-5)
Location: EDGECLIFF
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported 3.56 inches of rainfall for the day.

Flood in JEFFERSON, PENNSYLVANIA
From 29-SEP-15 19:05:00 to 30-SEP-15 02:00:00 (EST-5)
Location: REYNOLDSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

State official reported that several roads and basements were flooded through the county, including Brockway, Brookville, and Reynoldsville.

Heavy Rain in JEFFERSON, PENNSYLVANIA
From 29-SEP-15 18:40:00 to 29-SEP-15 18:40:00 (EST-5)
Location: BROOKVILLE
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Local 911 reported trees and wires down from heavy rain and flooding in Brookville.

Flood in ALLEGHENY, PENNSYLVANIA
From 29-SEP-15 18:50:00 to 30-SEP-15 00:00:00 (EST-5)
Location: MC KEES ROCKS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Member of the public on social media reported that the tunnel on River Avenue between Munson Avenue and Robb Street was closed due to flooding, and Clever Road between McKees Rocks Road and Montour Highschool was closed due to flooding. In addition, flooding was reported on the 800 block of Chartiers Avenue in Carnegie.

Flood in ALLEGHENY, PENNSYLVANIA
From 29-SEP-15 20:25:00 to 30-SEP-15 00:00:00 (EST-5)
Location: WILLOCK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media reported that the 4800 block of Streets Run Road was closed due to flooding and Route 51 was down to one lane due to water on the roadway.

Flood in WESTMORELAND, PENNSYLVANIA
From 29-SEP-15 21:17:00 to 30-SEP-15 01:00:00 (EST-5)
Location: ARNOLD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

State official reported flooding in residential areas in Arnold and Lower Burrell.

Heavy Rain in CLARION, PENNSYLVANIA
From 29-SEP-15 23:16:00 to 29-SEP-15 23:16:00 (EST-5)
Location: RIMERSBURG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Heavy Rain in CLARION, PENNSYLVANIA
From 29-SEP-15 17:14:00 to 29-SEP-15 17:14:00 (EST-5)
Location: HAWTHORN
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public