Thunderstorms developed into northeastern Oklahoma along a cold front that moved into the region on the evening of the 20th. The strongest thunderstorms produced damaging winds and large hail.

Thunderstorm Wind in OSAGE, OKLAHOMA
From 20-JUN-11 20:05:00 to 20-JUN-11 20:05:00 (CST-6)
Location: PEARSONIA
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Oklahoma Mesonet station near Foraker measured 64 mph thunderstorm wind gusts.

Thunderstorm Wind in OSAGE, OKLAHOMA
From 20-JUN-11 20:26:00 to 20-JUN-11 20:26:00 (CST-6)
Location: FORAKER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Large tree limbs were snapped by strong thunderstorm winds.

Thunderstorm Wind in OSAGE, OKLAHOMA
From 20-JUN-11 21:00:00 to 20-JUN-11 21:00:00 (CST-6)
Location: WYNONA
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Oklahoma Mesonet station located near Wynona measured 60 mph thunderstorm wind gusts.

Hail in CREEK, OKLAHOMA
From 20-JUN-11 21:46:00 to 20-JUN-11 21:46:00 (CST-6)
Location: NEW MANNFORD
Magnitude: 1.50 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CREEK, OKLAHOMA
From 20-JUN-11 22:00:00 to 20-JUN-11 22:00:00 (CST-6)
Location: HILTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in TULSA, OKLAHOMA
From 20-JUN-11 22:10:00 to 20-JUN-11 22:10:00 (CST-6)
Location: SPERRY
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in TULSA, OKLAHOMA
From 20-JUN-11 22:22:00 to 20-JUN-11 22:22:00 (CST-6)
Location: ALSUMA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in TULSA, OKLAHOMA
From 20-JUN-11 22:39:00 to 20-JUN-11 22:39:00 (CST-6)
Location: BROKEN ARROW ARPK
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind blew down large tree limbs and partially collapsed a large fireworks tent.

Thunderstorm Wind in MAYES, OKLAHOMA
From 20-JUN-11 22:45:00 to 20-JUN-11 22:45:00 (CST-6)
Location: PRYOR
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind blew down large trees, one of which fell onto a house.

Thunderstorm Wind in CRAIG, OKLAHOMA
From 20-JUN-11 22:47:00 to 20-JUN-11 22:47:00 (CST-6)
Location: VINITA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Large tree limbs were blown down by strong thunderstorm wind.

Thunderstorm Wind in MAYES, OKLAHOMA
From 20-JUN-11 23:00:00 to 20-JUN-11 23:00:00 (CST-6)
Location: LOCUST GROVE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind blew down trees and numerous large tree limbs.

Thunderstorm Wind in CRAIG, OKLAHOMA
From 20-JUN-11 23:11:00 to 20-JUN-11 23:11:00 (CST-6)
Location: VINITA
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Oklahoma Mesonet station located near Vinita measured 60 mph thunderstorm wind gusts.

Thunderstorm Wind in CRAIG, OKLAHOMA
From 20-JUN-11 23:15:00 to 20-JUN-11 23:15:00 (CST-6)
Location: BLUEJACKET
Magnitude: 56.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind blew down a power pole and numerous large tree limb.

Thunderstorm Wind in MAYES, OKLAHOMA
From 20-JUN-11 23:29:00 to 20-JUN-11 23:29:00 (CST-6)
Location: ADAIR
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind snapped a power pole and blew down several others.

Thunderstorm Wind in OTTAWA, OKLAHOMA
From 20-JUN-11 23:30:00 to 20-JUN-11 23:30:00 (CST-6)
Location: MIAMI
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind blew down several stadium light poles and a large tree.

Thunderstorm Wind in ROGERS, OKLAHOMA
From 20-JUN-11 22:25:00 to 20-JUN-11 22:25:00 (CST-6)
Location: CATOOSA
Magnitude: 65.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong thunderstorm wind blew down or snapped several large trees and destroyed a barn.