A shallow quasi-stationary frontal boundary was located from Iowa and Nebraska into portions of northern Indiana. Steep mid-level lapse rates, extreme instability (CAPES in excess of 8000 j/kg per Lincoln, IL sounding and strong mid-level flow allowed for a favorable environment for a cluster of storms over northeastern Illinois to rapidly intensify as they moved into northern Indiana.  A derecho was well underway as the line entered northwestern Ohio with widespread damage occurring in many locations.

Thunderstorm Wind in ALLEN, OHIO
From 29-JUN-12 15:00:00 to 29-JUN-12 15:01:00 (EST-5)
Location: LIMA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter estimated 60 mph wind gusts. Power lines and small tree limbs were blown down throughout the town.

Thunderstorm Wind in HENRY, OHIO
From 29-JUN-12 15:10:00 to 29-JUN-12 15:11:00 (EST-5)
Location: PLEASANT BEND
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A mesonet site recorded a 64 mph wind gust.

Thunderstorm Wind in VAN WERT, OHIO
From 29-JUN-12 15:00:00 to 29-JUN-12 15:05:00 (EST-5)
Location: SCOTT
Magnitude: 76.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A mesonet site recorded a 87 mph wind gust. The data from the site indicated the gusts continued for at least 5 minutes.

Thunderstorm Wind in PUTNAM, OHIO
From 29-JUN-12 14:58:00 to 29-JUN-12 14:59:00 (EST-5)
Location: COLUMBUS GROVE
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A local newspaper posted a picture of several large trees snapped and laid over onto State Route 65 in Columbus Grove, blocking the roadway for several hours.

Thunderstorm Wind in PUTNAM, OHIO
From 29-JUN-12 14:57:00 to 29-JUN-12 14:58:00 (EST-5)
Location: COLUMBUS GROVE
Magnitude: 65.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Newspaper

A local newspaper showed pictures of a second story wall of the two story Christies on the Square, built in the 1800s, being blown out with debris falling onto the street below, destroying two parked cars.

Thunderstorm Wind in PAULDING, OHIO
From 29-JUN-12 14:17:00 to 29-JUN-12 14:18:00 (EST-5)
Location: ANTWERP
Magnitude: 75.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported widespread large trees down.

Thunderstorm Wind in ALLEN, OHIO
From 29-JUN-12 14:36:00 to 29-JUN-12 14:37:00 (EST-5)
Location: LIMA
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a 80 foot pine tree snapped roughly 20 feet from the ground at the corner of 7th and Main Streets.

Thunderstorm Wind in ALLEN, OHIO
From 29-JUN-12 14:45:00 to 29-JUN-12 14:46:00 (EST-5)
Location: LIMA
Magnitude: 75.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported multiple trees down along Kemp Road. Shingles were blown off many roofs in the area.

Thunderstorm Wind in VAN WERT, OHIO
From 29-JUN-12 14:37:00 to 29-JUN-12 14:38:00 (EST-5)
Location: VAN WERT
Magnitude: 80.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management officials reported hundreds of trees down across the county. Widespread power outages as a result of major transmission poles, numbering at least 443, between Van Wert and Ottawa being blown down or snapped. Roofs were reported damaged on many homes, with cars and trucks flipped in portions of the county.

Thunderstorm Wind in ALLEN, OHIO
From 29-JUN-12 14:49:00 to 29-JUN-12 14:50:00 (EST-5)
Location: ALLENTOWN
Magnitude: 60.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a boat was driven into the rocks, on Bresler Lake, causing it to take on water. The driver of the boat had to be rescued by the local fire department.

Thunderstorm Wind in DEFIANCE, OHIO
From 29-JUN-12 14:50:00 to 29-JUN-12 14:51:00 (EST-5)
Location: AYERSVILLE
Magnitude: 75.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management officials reported the collapse of the second story of a residence. A barn was also blown down.

Thunderstorm Wind in PUTNAM, OHIO
From 29-JUN-12 14:55:00 to 29-JUN-12 14:56:00 (EST-5)
Location: OTTAWA
Magnitude: 80.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter reported a portion of a roof being blown off a factory as well as trees being uprooted in the area.

Thunderstorm Wind in PUTNAM, OHIO
From 29-JUN-12 15:08:00 to 29-JUN-12 15:09:00 (EST-5)
Location: PANDORA
Magnitude: 75.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Newspaper

A local newspaper reported a tree fell through a house near Pandora. In addition, the Bridenbaugh School house, north of Pandora, lost nearly half of its roof to the strong winds.

Thunderstorm Wind in PAULDING, OHIO
From 29-JUN-12 14:22:00 to 29-JUN-12 14:23:00 (EST-5)
Location: PAULDING
Magnitude: 73.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Emergency management officials recorded a 84 mph wind gust in Paulding.

Thunderstorm Wind in PAULDING, OHIO
From 29-JUN-12 14:25:00 to 29-JUN-12 14:26:00 (EST-5)
Location: ANTWERP
Magnitude: 66.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A mesonet site recorded a 76 mph wind gust.

Thunderstorm Wind in VAN WERT, OHIO
From 29-JUN-12 14:35:00 to 29-JUN-12 14:36:00 (EST-5)
Location: CONVOY
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A mesonet site recorded a 64 mph wind gust.

Thunderstorm Wind in VAN WERT, OHIO
From 29-JUN-12 14:20:00 to 29-JUN-12 14:21:00 (EST-5)
Location: CONVOY
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A mesonet site recorded a 59 mph wind gust.

Thunderstorm Wind in PAULDING, OHIO
From 29-JUN-12 14:44:00 to 29-JUN-12 14:45:00 (EST-5)
Location: ANTWERP
Magnitude: 66.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A mesonet site on U.S. 24, near the Indiana/Ohio state line measured a 76 mph wind gust.

Thunderstorm Wind in VAN WERT, OHIO
From 29-JUN-12 14:45:00 to 29-JUN-12 14:46:00 (EST-5)
Location: CONVOY
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A mesonet site recorded a 64 mph wind gust.

Thunderstorm Wind in HENRY, OHIO
From 29-JUN-12 14:55:00 to 29-JUN-12 14:56:00 (EST-5)
Location: NAPOLEON
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter recorded a 73 mph wind gust. Tree limbs were noted down in the area.

Thunderstorm Wind in PUTNAM, OHIO
From 29-JUN-12 14:55:00 to 29-JUN-12 14:56:00 (EST-5)
Location: COLUMBUS GROVE
Magnitude: 68.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A trained spotter recorded a 78 mph wind gust. A swing set at a residence was destroyed.

Thunderstorm Wind in PUTNAM, OHIO
From 29-JUN-12 14:50:00 to 29-JUN-12 14:51:00 (EST-5)
Location: OTTAWA PUTNAM CO ARP
Magnitude: 75.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Newspaper

A local newspaper reported that Ohio 109 was closed between Ottawa and Ohio 613 as a result of wind damage.