A cold front crossed central Pennsylvania during the afternoon and early evening hours of May 10, 2018. This front touched off several broken lines of convection, with storms producing both large hail and wind damage.  The largest storm produced ping pong ball-sized hail in southern York County.

Hail in CUMBERLAND, PENNSYLVANIA
From 10-MAY-18 15:15:00 to 10-MAY-18 15:15:00 (EST-5)
Location: SHIPPENSBURG
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A thunderstorm produced nickel-sized hail in Shippensburg.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 10-MAY-18 17:00:00 to 10-MAY-18 17:00:00 (EST-5)
Location: SHREWSBURY
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A severe thunderstorm produced a wind gust of 63 mph near Shrewsbury.

Hail in ADAMS, PENNSYLVANIA
From 10-MAY-18 16:23:00 to 10-MAY-18 16:23:00 (EST-5)
Location: ABBOTTSTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A severe thunderstorm produced nick to quarter-sized hail south of East Berlin.

Hail in YORK, PENNSYLVANIA
From 10-MAY-18 16:53:00 to 10-MAY-18 16:53:00 (EST-5)
Location: SHREWSBURY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced quarter-sized hail in Shrewsbury.

Hail in YORK, PENNSYLVANIA
From 10-MAY-18 16:55:00 to 10-MAY-18 16:55:00 (EST-5)
Location: STEWARTSTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A severe thunderstorm produced quarter-sized hail in Stewartstown.

Hail in DAUPHIN, PENNSYLVANIA
From 10-MAY-18 17:08:00 to 10-MAY-18 17:08:00 (EST-5)
Location: HERSHEY ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced quarter-sized hail north of Hershey.

Hail in YORK, PENNSYLVANIA
From 10-MAY-18 17:09:00 to 10-MAY-18 17:09:00 (EST-5)
Location: STEWARTSTOWN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

A severe thunderstorm produced quarter to ping-pong ball sized hail near Stewartstown.

Hail in LEBANON, PENNSYLVANIA
From 10-MAY-18 17:15:00 to 10-MAY-18 17:15:00 (EST-5)
Location: PALMYRA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A severe thunderstorm produced quarter-sized hail in Palmyra.

Thunderstorm Wind in MIFFLIN, PENNSYLVANIA
From 10-MAY-18 15:15:00 to 10-MAY-18 15:15:00 (EST-5)
Location: BURNHAM
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A severe thunderstorm producing winds estimated near 60 mph knocked down a tree onto an unoccupied vehicle.

Thunderstorm Wind in MIFFLIN, PENNSYLVANIA
From 10-MAY-18 15:17:00 to 10-MAY-18 15:17:00 (EST-5)
Location: LEWISTOWN
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A severe thunderstorm producing winds estimated near 60 mph knocked down wires in Lewistown.

Thunderstorm Wind in JUNIATA, PENNSYLVANIA
From 10-MAY-18 15:24:00 to 10-MAY-18 15:24:00 (EST-5)
Location: DENHOLM
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires on Cuba Mills Road.

Thunderstorm Wind in JUNIATA, PENNSYLVANIA
From 10-MAY-18 15:27:00 to 10-MAY-18 15:27:00 (EST-5)
Location: MIFFLINTOWN
Magnitude: 52.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires on Butcher Shop Road.

Thunderstorm Wind in PERRY, PENNSYLVANIA
From 10-MAY-18 16:20:00 to 10-MAY-18 16:20:00 (EST-5)
Location: NEW BUFFALO
Magnitude: 52.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires on Amity Road.

Thunderstorm Wind in DAUPHIN, PENNSYLVANIA
From 10-MAY-18 16:25:00 to 10-MAY-18 16:25:00 (EST-5)
Location: HALIFAX
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

A severe thunderstorm producing winds estimated near 60 mph knocked down trees north of Halifax.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 10-MAY-18 17:00:00 to 10-MAY-18 17:00:00 (EST-5)
Location: SHEFFER
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: County Official

A severe thunderstorm producing winds estimated near 60 mph knocked down trees across Sieling Farm Road.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 10-MAY-18 17:05:00 to 10-MAY-18 17:05:00 (EST-5)
Location: STEWARTSTOWN
Magnitude: 52.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: County Official

A severe thunderstorm producing winds estimated near 60 mph knocked down a tree and wires onto a structure in Stewartstown.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 10-MAY-18 17:07:00 to 10-MAY-18 17:07:00 (EST-5)
Location: STEWARTSTOWN
Magnitude: 52.00 EG
Property damage: 12.00K
Crop damage: 0.00K
Reported by: 911 Call Center

A severe thunderstorm producing winds estimated near 60 mph knocked down trees and wires in several locations from the Shrewsbury area eastward across Hopewell Township and into the Stewartstown area.

Thunderstorm Wind in YORK, PENNSYLVANIA
From 10-MAY-18 17:08:00 to 10-MAY-18 17:08:00 (EST-5)
Location: STEWARTSTOWN
Magnitude: 52.00 EG
Property damage: 6.00K
Crop damage: 0.00K
Reported by: Social Media

A severe thunderstorm producing winds estimated near 60 mph knocked down numerous trees around Stewartstown.