A strong area of low pressure tracked eastward across the northern Great Lakes during the afternoon and evening of the 20th. Scattered showers and thunderstorms developed ahead of the cold front and tracked eastward across the area. Many of the thunderstorms became severe in the very warm and humid airmass in place across the region. The thunderstorms diminished during the evening hours.

Thunderstorm Wind in MARION, OHIO
From 20-AUG-09 15:28:00 to 20-AUG-09 15:28:00 (EST-5)
Location: MARION
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several large limbs were reported down.

Thunderstorm Wind in LORAIN, OHIO
From 20-AUG-09 15:45:00 to 20-AUG-09 15:45:00 (EST-5)
Location: LORAIN
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees and large limbs were reported down in Lakeview Park in Lorain.

Thunderstorm Wind in LORAIN, OHIO
From 20-AUG-09 16:15:00 to 20-AUG-09 16:15:00 (EST-5)
Location: WELLINGTON
Magnitude: 50.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Public

Numerous trees were reported down.

Thunderstorm Wind in WYANDOT, OHIO
From 20-AUG-09 14:02:00 to 20-AUG-09 14:02:00 (EST-5)
Location: CAREY
Magnitude: 50.00 EG
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A few large trees were reported down. One tree fell onto a house causing damage.

Thunderstorm Wind in SENECA, OHIO
From 20-AUG-09 14:54:00 to 20-AUG-09 14:54:00 (EST-5)
Location: MELMORE
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Post Office

Several large limbs were reported down.

Thunderstorm Wind in CRAWFORD, OHIO
From 20-AUG-09 14:45:00 to 20-AUG-09 14:45:00 (EST-5)
Location: BUCYRUS
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

A few large limbs were reported down.

Thunderstorm Wind in KNOX, OHIO
From 20-AUG-09 16:35:00 to 20-AUG-09 16:35:00 (EST-5)
Location: MT VERNON
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

A few large limbs were reported down.

Thunderstorm Wind in CRAWFORD, OHIO
From 20-AUG-09 15:35:00 to 20-AUG-09 15:35:00 (EST-5)
Location: GALION
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A few large limbs were reported down throughout town. At the airport a large billboard sign was badly damaged.

Thunderstorm Wind in GEAUGA, OHIO
From 20-AUG-09 17:15:00 to 20-AUG-09 17:35:00 (EST-5)
Location: CHARDON
Magnitude: 50.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees and utility lines were reported down throughout the county.

Thunderstorm Wind in ASHTABULA, OHIO
From 20-AUG-09 18:15:00 to 20-AUG-09 18:15:00 (EST-5)
Location: CONNEAUT
Magnitude: 50.00 EG
Property damage: 6.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Several trees were reported down.

Thunderstorm Wind in TRUMBULL, OHIO
From 20-AUG-09 17:50:00 to 20-AUG-09 18:00:00 (EST-5)
Location: MESOPOTAMIA
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were reported down throughout the northern portion of the county.

Thunderstorm Wind in WAYNE, OHIO
From 20-AUG-09 16:50:00 to 20-AUG-09 17:00:00 (EST-5)
Location: WOOSTER
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Trees were reported down across the city and just west of Wooster.

Thunderstorm Wind in HURON, OHIO
From 20-AUG-09 15:28:00 to 20-AUG-09 15:28:00 (EST-5)
Location: WILLARD
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A few large limbs were reported down.

Thunderstorm Wind in MEDINA, OHIO
From 20-AUG-09 16:45:00 to 20-AUG-09 16:45:00 (EST-5)
Location: MEDINA
Magnitude: 50.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: NWS Employee

Many large limbs were reported down.

Thunderstorm Wind in TRUMBULL, OHIO
From 20-AUG-09 18:40:00 to 20-AUG-09 18:40:00 (EST-5)
Location: CORTLAND
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A few trees were reported down throughout northeast portions of the county.

Thunderstorm Wind in ASHTABULA, OHIO
From 20-AUG-09 18:00:00 to 20-AUG-09 18:00:00 (EST-5)
Location: ASHTABULA
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

A peak wind gust of 60 mph was measured by wind sensing equipment at the Ashtabula Lighthouse.

Thunderstorm Wind in SUMMIT, OHIO
From 20-AUG-09 17:00:00 to 20-AUG-09 17:00:00 (EST-5)
Location: RICHFIELD
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

A few large limbs were reported down.

Hail in LORAIN, OHIO
From 20-AUG-09 16:00:00 to 20-AUG-09 16:00:00 (EST-5)
Location: AVON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Penny size hail was observed.

Thunderstorm Wind in CUYAHOGA, OHIO
From 20-AUG-09 16:55:00 to 20-AUG-09 16:55:00 (EST-5)
Location: INDEPENDENCE
Magnitude: 50.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Several large limbs were reported down.

Thunderstorm Wind in ASHLAND, OHIO
From 20-AUG-09 16:15:00 to 20-AUG-09 16:15:00 (EST-5)
Location: POLK
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several trees were reported down.

Thunderstorm Wind in LAKE, OHIO
From 20-AUG-09 17:15:00 to 20-AUG-09 17:15:00 (EST-5)
Location: WAITE HILL
Magnitude: 50.00 EG
Property damage: 8.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Several large limbs and power lines were reported down.