Remnants of mesoscale convective systems over the Great Lakes advanced into the Ohio River Valley throughout the day on August 12th and helped to create severe storms. Despite little effective shear, DCAPE was very high (between 1300-1400J/kg) and was enough to accelerate downdrafts, causing strong surface wind. Weak zonal flow also created an ideal situation for training storms to develop as well.

Hail in MUSKINGUM, OHIO
From 12-AUG-21 18:36:00 to 12-AUG-21 18:36:00 (EST-5)
Location: ZANESVILLE PARR ARPT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A local citizen reported hail to the office.

Hail in MUSKINGUM, OHIO
From 12-AUG-21 18:37:00 to 12-AUG-21 18:37:00 (EST-5)
Location: ZANESVILLE PARR ARPT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Broadcast Media reported hail.

Thunderstorm Wind in JEFFERSON, OHIO
From 12-AUG-21 16:11:00 to 12-AUG-21 16:11:00 (EST-5)
Location: STEUBENVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media report of snapped trees in Steubenville.

Thunderstorm Wind in COLUMBIANA, OHIO
From 12-AUG-21 17:52:00 to 12-AUG-21 17:52:00 (EST-5)
Location: EAST LIVERPOOL
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A emergency manager reported numerous trees down along Croft Street.

Thunderstorm Wind in COLUMBIANA, OHIO
From 12-AUG-21 17:52:00 to 12-AUG-21 17:52:00 (EST-5)
Location: KENMOOR
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media report of multiple trees down and blocking 4th Avenue.

Thunderstorm Wind in COLUMBIANA, OHIO
From 12-AUG-21 17:54:00 to 12-AUG-21 17:54:00 (EST-5)
Location: EAST LIVERPOOL
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Local emergency manager reported numerous trees down throughout the city.

Thunderstorm Wind in MUSKINGUM, OHIO
From 12-AUG-21 18:14:00 to 12-AUG-21 18:14:00 (EST-5)
Location: STRINGTOWN
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported multiple trees down.

Thunderstorm Wind in MUSKINGUM, OHIO
From 12-AUG-21 18:36:00 to 12-AUG-21 18:36:00 (EST-5)
Location: ZANESVILLE PARR ARPT
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

A local citizen reported a large tree down in their yard.

Thunderstorm Wind in MUSKINGUM, OHIO
From 12-AUG-21 18:41:00 to 12-AUG-21 18:41:00 (EST-5)
Location: OTSEGO
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported multiple trees down and widespread power outages.

Thunderstorm Wind in GUERNSEY, OHIO
From 12-AUG-21 18:50:00 to 12-AUG-21 18:50:00 (EST-5)
Location: GUERNSEY
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media report of trees down and power outages.

Thunderstorm Wind in JEFFERSON, OHIO
From 12-AUG-21 19:39:00 to 12-AUG-21 19:39:00 (EST-5)
Location: NEW ALEXANDRIA
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

County official reported several trees and power lines down in the area.

Thunderstorm Wind in CARROLL, OHIO
From 12-AUG-21 20:05:00 to 12-AUG-21 20:05:00 (EST-5)
Location: LEESVILLE RES
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: 911 Call Center

Local 911 Call Center reported multiple trees down between Sherrodsville and Leesville.

Thunderstorm Wind in MUSKINGUM, OHIO
From 12-AUG-21 18:05:00 to 12-AUG-21 18:05:00 (EST-5)
Location: NORTH ZANESVILLE
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Social media report of numerous large tree branches snapped.