A shortwave trough crossed the Great Lakes on July 19th and then dove southward on the eastern flank of an upper ridge. The atmosphere was sufficiently unstable to allow isolated strong storms to develop. High moisture levels, with dewpoints in the 70s, also created an environment capable of producing heavy rainfall.

Flash Flood in VENANGO, PENNSYLVANIA
From 19-JUL-19 21:30:00 to 19-JUL-19 23:30:00 (EST-5)
Location: SENECA
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The local fire department reported multiple reports of flash flooding and water over roads in the Seneca area.

Flash Flood in VENANGO, PENNSYLVANIA
From 19-JUL-19 21:35:00 to 19-JUL-19 23:35:00 (EST-5)
Location: OIL CITY
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The local fire department reported multiple flooded roads around the Oil City area.

Flash Flood in CLARION, PENNSYLVANIA
From 19-JUL-19 22:00:00 to 19-JUL-19 23:55:00 (EST-5)
Location: KNOX
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 0.00K
Reported by: 911 Call Center

The local 911 Call Center reported that multiple roadways across Clarion County were closed due to flooding.

Flash Flood in VENANGO, PENNSYLVANIA
From 19-JUL-19 22:00:00 to 19-JUL-19 23:55:00 (EST-5)
Location: ROCKMERE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

The local 911 call center reported flooding at several locations across the county.

Flash Flood in CLARION, PENNSYLVANIA
From 19-JUL-19 22:15:00 to 19-JUL-19 23:50:00 (EST-5)
Location: NEW BETHLEHEM
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The local fire department reported multiple water rescues in the New Bethlehem area. Several roads were closed. Video showed that the local creek was significantly out of its banks and flowing over Broad Street.
A family was rescued along Vine Street early Saturday morning. Officials advised other residents to evacuate. Flooding was reported along portions of Broad Street and Penn Street. Both New Bethlehem Primary School along Vine Street and the Clarion Hospital Ambulance station were flooded.
More about this flooding:
http://www.thecourierexpress.com/the_leader_vindicator/news/local/flash-flood-creates-chaos-overnight-for-new-bethlehem-area/article_b49609cc-2694-5771-85c5-fda2a9ce5c14.html.

Thunderstorm Wind in VENANGO, PENNSYLVANIA
From 19-JUL-19 19:31:00 to 19-JUL-19 19:31:00 (EST-5)
Location: GRANDVIEW
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A local 911 call center reported a tree and power lines down near Rouseville.

Thunderstorm Wind in VENANGO, PENNSYLVANIA
From 19-JUL-19 18:40:00 to 19-JUL-19 18:40:00 (EST-5)
Location: CHAPMANVILLE
Magnitude: 50.00 EG
Reported by: 911 Call Center

The local 911 call center reported a tree down near Route 27. Another tree was reported down in Plum Township.

Thunderstorm Wind in CLARION, PENNSYLVANIA
From 19-JUL-19 19:21:00 to 19-JUL-19 19:21:00 (EST-5)
Location: SCOTCH HILL
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

The local 911 call center reported three trees down across Farmington Township.