A cold front and associated pre-frontal trough lead to the development of thunderstorms in the afternoon and evening hours. Some of the thunderstorms became severe with damaging winds. The thunderstorms also knocked out power to thousands of people.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 18-JUL-16 14:05:00 to 18-JUL-16 14:05:00 (EST-5)
Location: GUTH
Magnitude: 52.00 EG
Reported by: Trained Spotter

Several trees taken down due to thunderstorm wind gusts.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 18-JUL-16 14:00:00 to 18-JUL-16 14:00:00 (EST-5)
Location: BREINIGSVILLE
Magnitude: 52.00 EG
Reported by: Social Media

A wheat crop was damaged due to thunderstorm wind gusts.

Thunderstorm Wind in BERKS, PENNSYLVANIA
From 18-JUL-16 13:58:00 to 18-JUL-16 13:58:00 (EST-5)
Location: MONTEREY
Magnitude: 52.00 EG
Reported by: Social Media

A large tree was taken down by thunderstorm wind gusts and knocked off several wires as well onto old Topton Rd.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 18-JUL-16 14:07:00 to 18-JUL-16 14:07:00 (EST-5)
Location: ALLENTOWN MUNI
Magnitude: 52.00 EG
Reported by: Social Media

A large tree feel down due to thunderstorm wind gusts onto a car on 22nd street damaging a car.

Flood in LEHIGH, PENNSYLVANIA
From 18-JUL-16 14:15:00 to 18-JUL-16 14:15:00 (EST-5)
Location: GAUFF HILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Roadway flooding was observed in the area.

Hail in BERKS, PENNSYLVANIA
From 18-JUL-16 14:10:00 to 18-JUL-16 14:10:00 (EST-5)
Location: TOPTON
Magnitude: 0.88 
Reported by: Social Media

Close to one inch diameter hail occurred with thunderstorms.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 18-JUL-16 14:14:00 to 18-JUL-16 14:14:00 (EST-5)
Location: ALLENTOWN MUNI
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees were knocked down due to thunderstorm wind gusts.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 18-JUL-16 14:08:00 to 18-JUL-16 14:08:00 (EST-5)
Location: ALLENTOWN MUNI
Magnitude: 60.00 EG
Reported by: Trained Spotter

Several trees taken down due to thunderstorm winds.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 18-JUL-16 14:08:00 to 18-JUL-16 14:08:00 (EST-5)
Location: ALLENTOWN MUNI
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Measured 62 mph thunderstorm wind gust.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 18-JUL-16 13:58:00 to 18-JUL-16 13:58:00 (EST-5)
Location: OREFIELD
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Trees and wires taken down due to thunderstorm wind gusts.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 18-JUL-16 14:05:00 to 18-JUL-16 14:05:00 (EST-5)
Location: STILES
Magnitude: 52.00 EG
Reported by: Trained Spotter

Several trees taken down due to thunderstorm wind gusts.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 18-JUL-16 14:28:00 to 18-JUL-16 14:28:00 (EST-5)
Location: AMBLER
Magnitude: 52.00 EG
Reported by: Trained Spotter

Thunderstorm winds took down a tree which hit a transformer and various power lines.

Thunderstorm Wind in MONTGOMERY, PENNSYLVANIA
From 18-JUL-16 14:41:00 to 18-JUL-16 14:41:00 (EST-5)
Location: NARBERTH
Magnitude: 52.00 EG
Reported by: Trained Spotter

Thunderstorm winds led to several downed trees.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 18-JUL-16 14:45:00 to 18-JUL-16 14:45:00 (EST-5)
Location: EAST LANSDOWNE
Magnitude: 52.00 EG
Reported by: Trained Spotter

Thunderstorm winds knocked over several trees in the area.

Thunderstorm Wind in DELAWARE, PENNSYLVANIA
From 18-JUL-16 14:43:00 to 18-JUL-16 14:43:00 (EST-5)
Location: OAKMONT
Magnitude: 61.00 EG
Reported by: Social Media

Several large trees were taken down by thunderstorm wind gusts falling onto cars and other property. Limbs also pulled down wires. A silo was also destroyed due to thunderstorm winds.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 18-JUL-16 14:00:00 to 18-JUL-16 14:00:00 (EST-5)
Location: ECKERT
Magnitude: 56.00 EG
Reported by: Broadcast Media

A roof was partially collapsed due to thunderstorm wind gusts.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 18-JUL-16 14:05:00 to 18-JUL-16 14:05:00 (EST-5)
Location: ALLENTOWN MUNI
Magnitude: 52.00 EG
Reported by: Social Media

Several trees taken down due to thunderstorm wind gusts near 13th street and Congress Ave. These blocked roads in several spots.

Thunderstorm Wind in LEHIGH, PENNSYLVANIA
From 18-JUL-16 14:02:00 to 18-JUL-16 14:02:00 (EST-5)
Location: TREXLERTOWN
Magnitude: 52.00 EG
Reported by: Social Media

Several trees and wires taken down due to thunderstorm winds.