Strong west winds affected Eastern Pennsylvania from the afternoon into the first half of the evening on the 8th. Strong winds persisted longer overnight over the higher terrain of the Poconos. Peak wind gusts averaged around 50 mph and tore down weak trees, tree limbs and wires. About 31,000 homes and businesses lost power. In southeastern Pennsylvania, about 25,000 PECO Energy homes and businesses lost power. In Pottstown (Montgomery County), a male driver was injured on South Street after a tree limb cracked his wind shield. In Bucks County, the majority of the Pennsylvania Power and Light outages were concentrated in East Rockhill Township. In the Lehigh Valley, in Upper Milford Township (Lehigh County), a minivan and pick-up truck were damaged by downed trees. Another tree fell against a home in Bethlehem. Outages in Lehigh County were concentrated in Upper Saucon Township.
Peak wind gusts included 58 mph in Mount Pocono (Monroe County), 55 mph at the Philadelphia International Airport, 51 mph at Northeast Philadelphia Airport, 50 mph in Kenneth Square (Chester County) and the Lehigh Valley International Airport, 47 mph in Reading (Berks County) and Doylestown (Bucks County) and 46 mph at the Willow Grove NAS in Montgomery County.
The strong west winds were caused by the pressure difference between an intensifying low pressure system that moved through the Saint Lawrence Valley and a high pressure system moving toward the east from the Northern Plains.

Strong Wind in NORTHAMPTON, PENNSYLVANIA
From 08-MAY-10 14:00:00 to 08-MAY-10 20:00:00 (EST-5)
Magnitude: 43.00 MG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: ASOS

High Wind in MONROE, PENNSYLVANIA
From 08-MAY-10 16:00:00 to 08-MAY-10 19:00:00 (EST-5)
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Strong Wind in MONTGOMERY, PENNSYLVANIA
From 08-MAY-10 13:00:00 to 08-MAY-10 18:00:00 (EST-5)
Magnitude: 40.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: AWSS

Strong Wind in CHESTER, PENNSYLVANIA
From 08-MAY-10 12:00:00 to 08-MAY-10 20:00:00 (EST-5)
Magnitude: 43.00 MG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in CARBON, PENNSYLVANIA
From 08-MAY-10 12:00:00 to 09-MAY-10 01:00:00 (EST-5)
Magnitude: 45.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in DELAWARE, PENNSYLVANIA
From 08-MAY-10 12:00:00 to 08-MAY-10 21:00:00 (EST-5)
Magnitude: 45.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Mesonet

Strong Wind in PHILADELPHIA, PENNSYLVANIA
From 08-MAY-10 12:00:00 to 08-MAY-10 20:00:00 (EST-5)
Magnitude: 48.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: ASOS

Strong Wind in BUCKS, PENNSYLVANIA
From 08-MAY-10 14:00:00 to 08-MAY-10 19:00:00 (EST-5)
Magnitude: 41.00 MG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: ASOS

Strong Wind in LEHIGH, PENNSYLVANIA
From 08-MAY-10 14:00:00 to 08-MAY-10 20:00:00 (EST-5)
Magnitude: 43.00 MG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: ASOS

Strong Wind in BERKS, PENNSYLVANIA
From 08-MAY-10 12:00:00 to 08-MAY-10 20:00:00 (EST-5)
Magnitude: 41.00 MG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: ASOS