A deepening low pressure system, originating from the southern plains, moved towards the western Great Lakes on Wednesday March 9th. A wintry mix of precipitation changed over to all rain as the warm front associated with this system pushed across the region on Wednesday morning. Periods of moderate to heavy rain continued through the passage of the upper level trough late Thursday. With much of the region already saturated from previous rainfall over the past 2 weeks many streams and creeks were already elevated. The additional 1 to 2 inches of rainfall resulted in my streams and creeks gong out of their banks throughout east central Ohio, western Pennsylvania and northern West Virginia. As the low progressed to the east rain changed back to snow bringing 4 to 5 inches of heavy wet snow to east central Ohio and northwestern Pennsylvania, mainly north of I-70. Higher amounts of 6 to 8 inches fell in in Columbiana, Mercer, Lawrence and Venango counties.

Flood in BEAVER, PENNSYLVANIA
From 10-MAR-11 21:43:00 to 11-MAR-11 21:50:00 (EST-5)
Location: DARLINGTON
Flood cause: Heavy Rain
Property damage: 8.00K
Crop damage: 0.00K
Reported by: County Official

County official reports of a few roads closed due to flooding in Hopewell and Darlington townships.

Flood in BUTLER, PENNSYLVANIA
From 11-MAR-11 05:25:00 to 12-MAR-11 05:25:00 (EST-5)
Location: ZELIENOPLE
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Mesonet

Mesonet indicated that the Connoquenessing Creek has reached 11.2 feet. Flood stage is 11.0 feet.

Flood in WASHINGTON, PENNSYLVANIA
From 10-MAR-11 14:00:00 to 11-MAR-11 10:00:00 (EST-5)
Location: WOLFDALE
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The Washington county emergency manager reported a water rescue on Catfish Creek.

Flood in ARMSTRONG, PENNSYLVANIA
From 11-MAR-11 06:13:00 to 11-MAR-11 09:00:00 (EST-5)
Location: CLINTON
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reports that River Road in South Buffalo Township is flooded.

Flood in CLARION, PENNSYLVANIA
From 11-MAR-11 08:56:00 to 11-MAR-11 09:30:00 (EST-5)
Location: SCOTCH HILL
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Fire rescue reports that River Rd is flooded near Cooks Forest State Park.

Flood in LAWRENCE, PENNSYLVANIA
From 10-MAR-11 18:12:00 to 11-MAR-11 19:00:00 (EST-5)
Location: NEW CASTLE
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Lawrence county official and emergency manager reports of numerous road closures throughout county due to flooding. A trained spotter reports that Neshannock and Slippery Rock creeks are flooding homes in New Castle and Harlansburg.

Flood in ALLEGHENY, PENNSYLVANIA
From 10-MAR-11 20:50:00 to 11-MAR-11 21:50:00 (EST-5)
Location: CURTISVILLE
Flood cause: Heavy Rain
Property damage: 12.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency Manager reports of flooding along Little Deer Creek Valley Road and a hillside-mudslide coming down on Hoffman Road in Reserve Township.

Heavy Snow in MERCER, PENNSYLVANIA
From 10-MAR-11 22:00:00 to 11-MAR-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy Snow in LAWRENCE, PENNSYLVANIA
From 10-MAR-11 22:00:00 to 11-MAR-11 15:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy Snow in VENANGO, PENNSYLVANIA
From 10-MAR-11 22:00:00 to 11-MAR-11 19:00:00 (EST-5)
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer