Thunderstorms developed across north central Oklahoma and south central Kansas during the early morning hours of the 13th, as a low level jet strengthened across the region. Moderately strong instability combined with strong deep layer wind shear to produce severe thunderstorms with large hail up to golf ball size and damaging wind gusts. In addition, slow moving storms that moved repeatedly across the same area resulted in locally heavy rainfall and localized flash flooding.

Hail in OSAGE, OKLAHOMA
From 13-AUG-20 00:59:00 to 13-AUG-20 00:59:00 (CST-6)
Location: BURBANK
Magnitude: 1.75 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Public

Golf ball size hail damaged vehicles and homes.

Hail in OSAGE, OKLAHOMA
From 13-AUG-20 01:40:00 to 13-AUG-20 01:40:00 (CST-6)
Location: HOMINY
Magnitude: 1.75 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Golf ball size hail damaged vehicles and homes.

Thunderstorm Wind in TULSA, OKLAHOMA
From 13-AUG-20 02:55:00 to 13-AUG-20 02:55:00 (CST-6)
Location: BIXBY
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong thunderstorm wind blew down trees.

Hail in OSAGE, OKLAHOMA
From 13-AUG-20 01:57:00 to 13-AUG-20 01:57:00 (CST-6)
Location: SKIATOOK
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in OSAGE, OKLAHOMA
From 13-AUG-20 01:57:00 to 13-AUG-20 01:57:00 (CST-6)
Location: SKIATOOK
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm wind gusts were estimated to 60 mph.

Thunderstorm Wind in TULSA, OKLAHOMA
From 13-AUG-20 02:24:00 to 13-AUG-20 02:24:00 (CST-6)
Location: DAWSON
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Oklahoma Mesonet station near Tulsa measured 63 mph thunderstorm wind gusts.

Thunderstorm Wind in TULSA, OKLAHOMA
From 13-AUG-20 02:30:00 to 13-AUG-20 02:30:00 (CST-6)
Location: DAWSON
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Strong thunderstorm wind blew down trees, and snapped large tree limbs.

Thunderstorm Wind in TULSA, OKLAHOMA
From 13-AUG-20 02:37:00 to 13-AUG-20 02:37:00 (CST-6)
Location: DAWSON
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Strong thunderstorm wind snapped large tree limbs.

Thunderstorm Wind in TULSA, OKLAHOMA
From 13-AUG-20 02:54:00 to 13-AUG-20 02:54:00 (CST-6)
Location: BIXBY
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Oklahoma Mesonet station near Bixby measured 61 mph thunderstorm wind gusts.

Flash Flood in TULSA, OKLAHOMA
From 13-AUG-20 03:12:00 to 13-AUG-20 07:00:00 (CST-6)
Location: DAWSON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Portions of E 11th Street were flooded west of Highway 169 and east of S Yale Avenue.

Thunderstorm Wind in MUSKOGEE, OKLAHOMA
From 13-AUG-20 04:30:00 to 13-AUG-20 04:30:00 (CST-6)
Location: WARNER
Magnitude: 65.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind blew down trees, and snapped a power pole.