Several days of record warmth came to an end with a frontal passage. Abnormally high moisture and instability was present ahead of the front. This led to a line of showers and thunderstorms ahead of the front that produced damaging winds and hail during the late afternoon hours. Thousands of people lost power and the hardest hit regions were from Berks county northward into the Lehigh Valley. Philadelphia International had a ground stop during the storms with numerous flight delays.

Hail in BERKS, PENNSYLVANIA
From 25-FEB-17 15:45:00 to 25-FEB-17 15:45:00 (EST-5)
Location: STOUCHSBURG
Magnitude: 1.00 
Reported by: Trained Spotter

Quarter size hail was measured.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 25-FEB-17 16:31:00 to 25-FEB-17 16:31:00 (EST-5)
Location: CLEARFIELD
Magnitude: 52.00 EG
Reported by: State Official

Several trees and wires downed due to thunderstorm winds.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 25-FEB-17 16:38:00 to 25-FEB-17 16:38:00 (EST-5)
Location: BELFAST
Magnitude: 52.00 EG
Reported by: Department of Highways

Trees downed onto wires due to thunderstorm winds at Sullivan trail road between Belfast road and Church road.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 25-FEB-17 16:30:00 to 25-FEB-17 16:30:00 (EST-5)
Location: CLEARFIELD
Magnitude: 52.00 EG
Reported by: Trained Spotter

A tree fell onto a barn, a horse died on Creamery road. Trees down on Keller Road, Gold Mill Road, Jacobsburg Drive, Parkland Drive and Renaldi Drive.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 25-FEB-17 15:55:00 to 25-FEB-17 15:55:00 (EST-5)
Location: HAMBURG
Magnitude: 52.00 MG
Reported by: Trained Spotter

A measured 60 mph gust.

Thunderstorm Wind in CARBON, PENNSYLVANIA
From 25-FEB-17 16:06:00 to 25-FEB-17 16:06:00 (EST-5)
Location: PARRYVILLE
Magnitude: 52.00 EG
Reported by: State Official

Trees down throughout the county particularly from Parryville and points northeast.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 25-FEB-17 16:07:00 to 25-FEB-17 16:07:00 (EST-5)
Location: KUTZTOWN
Magnitude: 61.00 EG
Reported by: Social Media

A roof of a medivac hanger was blown off and hit a house in a mobile home park due to thunderstorm winds. Power outages as well.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 25-FEB-17 16:09:00 to 25-FEB-17 16:09:00 (EST-5)
Location: BLANDON
Magnitude: 52.00 EG
Reported by: Social Media

Yard fencing was blown off due to thunderstorm winds.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 25-FEB-17 16:40:00 to 25-FEB-17 16:40:00 (EST-5)
Location: STOCKERTOWN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

Traffic lights were blown down at the Tatamy interchange on route 33.

Hail in BERKS, PENNSYLVANIA
From 25-FEB-17 15:20:00 to 25-FEB-17 15:20:00 (EST-5)
Location: BERNVILLE
Magnitude: 1.00 
Reported by: Trained Spotter

Quarter size hail was measured.

Hail in BERKS, PENNSYLVANIA
From 25-FEB-17 15:54:00 to 25-FEB-17 15:54:00 (EST-5)
Location: BERNVILLE
Magnitude: 1.00 
Reported by: Trained Spotter

Quarter size hail was measured.

Hail in BERKS, PENNSYLVANIA
From 25-FEB-17 16:15:00 to 25-FEB-17 16:15:00 (EST-5)
Location: BOYERTOWN
Magnitude: 0.75 
Reported by: Trained Spotter

Penny size hail was measured.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 25-FEB-17 16:35:00 to 25-FEB-17 16:35:00 (EST-5)
Location: ZUCKSVILLE
Magnitude: 52.00 EG
Reported by: State Official

Several trees and wires downed due to thunderstorm winds.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 25-FEB-17 15:56:00 to 25-FEB-17 15:56:00 (EST-5)
Location: (RDG)SPAATZ FLD READ
Magnitude: 53.00 MG
Reported by: ASOS

Measured 61 mph wind gust.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 25-FEB-17 16:00:00 to 25-FEB-17 16:00:00 (EST-5)
Location: READING
Magnitude: 56.00 MG
Reported by: Mesonet

Measured wind gust.

Hail in PHILADELPHIA, PENNSYLVANIA
From 25-FEB-17 17:14:00 to 25-FEB-17 17:14:00 (EST-5)
Location: MANAYUNK
Magnitude: 0.75 
Reported by: Trained Spotter

Penny size hail was measured.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 25-FEB-17 15:50:00 to 25-FEB-17 15:50:00 (EST-5)
Location: SINKING SPG
Magnitude: 61.00 EG
Reported by: Trained Spotter

Five trees were downed and a part of a barn roof was torn off.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 25-FEB-17 15:50:00 to 25-FEB-17 15:50:00 (EST-5)
Location: MONTELLO
Magnitude: 52.00 EG
Reported by: Fire Department/Rescue

Several trees snapped and uprooted due to thunderstorm winds.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 25-FEB-17 16:05:00 to 25-FEB-17 16:05:00 (EST-5)
Location: FLEETWOOD
Magnitude: 61.00 EG
Reported by: Broadcast Media

Several power poles and trees were downed due to thunderstorm winds. A barn roof was blown off.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 25-FEB-17 16:15:00 to 25-FEB-17 16:15:00 (EST-5)
Location: SLATINGTON
Magnitude: 52.00 EG
Reported by: State Official

Several reports of downed power lines and trees along with roof damage.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 25-FEB-17 16:23:00 to 25-FEB-17 16:23:00 (EST-5)
Location: MACUNGIE
Magnitude: 56.00 EG
Reported by: State Official

A roof was blown off an apartment building due to thunderstorm winds. All occupants were evacuated and had to seek housing elsewhere.

Hail in LEHIGH, PENNSYLVANIA
From 25-FEB-17 16:30:00 to 25-FEB-17 16:30:00 (EST-5)
Location: ALLENTOWN MUNI
Magnitude: 0.75 
Reported by: Trained Spotter

Penny size hail was measured.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 25-FEB-17 16:23:00 to 25-FEB-17 16:23:00 (EST-5)
Location: HYNEMANSVILLE
Magnitude: 52.00 EG
Reported by: State Official

Several power poles downed due to thunderstorm winds.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 25-FEB-17 16:25:00 to 25-FEB-17 16:25:00 (EST-5)
Location: ALLENTOWN MUNI
Magnitude: 52.00 EG
Reported by: Newspaper

Several trees downed in West Allentown due to thunderstorm winds.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 25-FEB-17 16:30:00 to 25-FEB-17 16:30:00 (EST-5)
Location: BUSHKILL CENTER
Magnitude: 61.00 EG
Reported by: Trained Spotter

Numerous trees, power lines and telephone poles down due to thunderstorm winds. Some of the trees were blown onto homes and a barn. A tractor trailer was also overturned due to the wind and moved 30 feet.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 25-FEB-17 16:11:00 to 25-FEB-17 16:11:00 (EST-5)
Location: EMERALD
Magnitude: 52.00 EG
Reported by: State Official

Several reports of downed power lines, poles and trees along with roof damage due to thunderstorm winds.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 25-FEB-17 16:48:00 to 25-FEB-17 16:48:00 (EST-5)
Location: MARKHAM
Magnitude: 52.00 MG
Reported by: Trained Spotter

Measured wind gust.

Thunderstorm Wind in NORTHAMPTON, PENNSYLVANIA
From 25-FEB-17 16:35:00 to 25-FEB-17 16:35:00 (EST-5)
Location: WIND GAP
Magnitude: 52.00 EG
Reported by: Broadcast Media

Several trees downed with one hitting a house on Sullivan trail.