Showers and thunderstorms developed along a warm front moving slowly across western Pennsylvania during the late afternoon of the 7th into the early morning of the 8th. Isolated severe thunderstorms and flash flooding occurred.

Flood in BEAVER, PENNSYLVANIA
From 07-MAY-12 23:52:00 to 08-MAY-12 05:00:00 (EST-5)
Location: NEW SHEFFIELD
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: County Official

Several roads in Hopewell Township closed due to flooding with up to 2 feet of water over roads near the community park.

Hail in BUTLER, PENNSYLVANIA
From 07-MAY-12 15:45:00 to 07-MAY-12 15:45:00 (EST-5)
Location: ZELIENOPLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BUTLER, PENNSYLVANIA
From 07-MAY-12 16:20:00 to 07-MAY-12 16:20:00 (EST-5)
Location: VALENCIA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BUTLER, PENNSYLVANIA
From 07-MAY-12 17:05:00 to 07-MAY-12 17:05:00 (EST-5)
Location: SARVER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in ARMSTRONG, PENNSYLVANIA
From 07-MAY-12 17:10:00 to 07-MAY-12 17:10:00 (EST-5)
Location: FREEPORT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BUTLER, PENNSYLVANIA
From 07-MAY-12 17:10:00 to 07-MAY-12 17:10:00 (EST-5)
Location: SARVER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MERCER, PENNSYLVANIA
From 07-MAY-12 19:20:00 to 07-MAY-12 19:20:00 (EST-5)
Location: TRANSFER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MERCER, PENNSYLVANIA
From 07-MAY-12 19:40:00 to 07-MAY-12 19:40:00 (EST-5)
Location: FARRELL
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in MERCER, PENNSYLVANIA
From 07-MAY-12 19:47:00 to 07-MAY-12 19:47:00 (EST-5)
Location: HERMITAGE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MERCER, PENNSYLVANIA
From 07-MAY-12 19:53:00 to 07-MAY-12 19:53:00 (EST-5)
Location: HERMITAGE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MERCER, PENNSYLVANIA
From 07-MAY-12 19:58:00 to 07-MAY-12 19:58:00 (EST-5)
Location: FARRELL
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MERCER, PENNSYLVANIA
From 07-MAY-12 19:40:00 to 07-MAY-12 19:40:00 (EST-5)
Location: HERMITAGE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MERCER, PENNSYLVANIA
From 07-MAY-12 19:50:00 to 07-MAY-12 19:50:00 (EST-5)
Location: FARRELL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MERCER, PENNSYLVANIA
From 07-MAY-12 19:45:00 to 07-MAY-12 19:45:00 (EST-5)
Location: WHEATLAND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in MERCER, PENNSYLVANIA
From 07-MAY-12 19:40:00 to 07-MAY-12 19:40:00 (EST-5)
Location: HERMITAGE
Magnitude: 50.00 EG
Property damage: 35.00K
Crop damage: 0.00K
Reported by: Newspaper

A newspaper reported a roof blown off a large industrial building east of Hermitage.

Flash Flood in MERCER, PENNSYLVANIA
From 07-MAY-12 20:53:00 to 08-MAY-12 01:00:00 (EST-5)
Location: SHARON
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported flash flooding with several roads closed from Sharon to Hermitage.

Thunderstorm Wind in ARMSTRONG, PENNSYLVANIA
From 07-MAY-12 13:02:00 to 07-MAY-12 13:02:00 (EST-5)
Location: GOHEENVILLE
Magnitude: 50.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

A large tree was reported down across State Route 2866 in Boggs Township.

Hail in MERCER, PENNSYLVANIA
From 07-MAY-12 20:17:00 to 07-MAY-12 20:17:00 (EST-5)
Location: HERMITAGE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported hail 2 inches deep on the ground with maximum size around a nickel.