A large low pressure system tracked across the Great Lakes during the late afternoon and early evening, dragging a cold front across the region.  Ahead of the front, shortwaves embedded in strong southerly flow supported showers and thunderstorms, some of which became severe during the afternoon.  Convection organized into a squall line that produced wind damage. While instability was not excessive, high levels of wind shear and low level helicity produced several rotating storms in the main line. These storms produced 6 confirmed tornadoes including 2 EF-0s across Butler county, and 3 EF-0s and 1 EF-1 in Clarion county in Pennsylvania. Most damage was done to trees or structures from falling/snapped trees.

Thunderstorm Wind in CARROLL, OHIO
From 01-MAY-17 12:17:00 to 01-MAY-17 12:17:00 (EST-5)
Location: LEESVILLE RES
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Other federal agency reported numerous trees reported down around Leesville Lake.

Thunderstorm Wind in TUSCARAWAS, OHIO
From 01-MAY-17 12:20:00 to 01-MAY-17 12:20:00 (EST-5)
Location: DOVER
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

A member of the public reported many trees down on Boulevard Street/Route 800 in Dover.

Thunderstorm Wind in JEFFERSON, OHIO
From 01-MAY-17 12:39:00 to 01-MAY-17 12:39:00 (EST-5)
Location: SMITHFIELD
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Member of the public reported trees down.

Thunderstorm Wind in COLUMBIANA, OHIO
From 01-MAY-17 12:40:00 to 01-MAY-17 12:40:00 (EST-5)
Location: SALEM
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Member of the public reported trees down.

Thunderstorm Wind in COLUMBIANA, OHIO
From 01-MAY-17 12:55:00 to 01-MAY-17 12:55:00 (EST-5)
Location: NEW GARDEN
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

State official reported multiple large trees down in New Garden.

Thunderstorm Wind in COSHOCTON, OHIO
From 01-MAY-17 11:15:00 to 01-MAY-17 11:15:00 (EST-5)
Location: COSHOCTON
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Amateur Radio reported trees down.

Thunderstorm Wind in COSHOCTON, OHIO
From 01-MAY-17 11:29:00 to 01-MAY-17 11:29:00 (EST-5)
Location: PEARL
Magnitude: 50.00 EG
Property damage: 0.25K
Crop damage: 0.00K
Reported by: Public

The public reported a tree down on Ohio 93.

Thunderstorm Wind in NOBLE, OHIO
From 01-MAY-17 11:45:00 to 01-MAY-17 11:45:00 (EST-5)
Location: SARAHSVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: State Official

State official reported trees down along State Route 215, 285, and 147.

Thunderstorm Wind in GUERNSEY, OHIO
From 01-MAY-17 12:00:00 to 01-MAY-17 12:00:00 (EST-5)
Location: LORE CITY
Magnitude: 50.00 EG
Property damage: 1.50K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported shingle/roof damage to Buckeye Trail High School.

Thunderstorm Wind in NOBLE, OHIO
From 01-MAY-17 12:00:00 to 01-MAY-17 12:00:00 (EST-5)
Location: BATESVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency Manager reported several trees down.

Thunderstorm Wind in TUSCARAWAS, OHIO
From 01-MAY-17 12:05:00 to 01-MAY-17 12:05:00 (EST-5)
Location: UHRICHSVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Local 911 reported power lines and trees down in Uhrichville.

Thunderstorm Wind in TUSCARAWAS, OHIO
From 01-MAY-17 12:08:00 to 01-MAY-17 12:08:00 (EST-5)
Location: UHRICHSVILLE
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Public

The public reported trees down at Lone Pine Rd and Ohio 250.

Thunderstorm Wind in NOBLE, OHIO
From 01-MAY-17 11:46:00 to 01-MAY-17 11:46:00 (EST-5)
Location: SARAHSVILLE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported numerous trees down.

Thunderstorm Wind in NOBLE, OHIO
From 01-MAY-17 11:51:00 to 01-MAY-17 11:51:00 (EST-5)
Location: COAL RIDGE
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency Management reported trees down.

Thunderstorm Wind in NOBLE, OHIO
From 01-MAY-17 11:55:00 to 01-MAY-17 11:55:00 (EST-5)
Location: SUMMERFIELD
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency Management reported numerous trees down.

Thunderstorm Wind in GUERNSEY, OHIO
From 01-MAY-17 11:56:00 to 01-MAY-17 11:56:00 (EST-5)
Location: BIRMINGHAM
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency manager reported numerous trees down.

Thunderstorm Wind in TUSCARAWAS, OHIO
From 01-MAY-17 12:13:00 to 01-MAY-17 12:13:00 (EST-5)
Location: NEW CUMBERLAND
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported several trees down.

Thunderstorm Wind in CARROLL, OHIO
From 01-MAY-17 12:15:00 to 01-MAY-17 12:15:00 (EST-5)
Location: NEW HAGERSTOWN
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trained spotter reported several trees down.

Thunderstorm Wind in HARRISON, OHIO
From 01-MAY-17 12:15:00 to 01-MAY-17 12:15:00 (EST-5)
Location: TAPPAN
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management reported a roof blown off Tappan Lake Marina.