A slow-moving upper level storm system moved from the Southern Rockies into the Southern Plains during the 10th and 11th. Warm, moist, and unstable air was in place across eastern Oklahoma ahead of this system. Several disturbances translated across the Southern Plains ahead of the main system, resulting in multiple rounds of strong to severe thunderstorm development along the associated frontal boundary that slowly progressed eastward and southward through the region. These storms produced several tornadoes, hail up to golfball size, damaging wind, and locally heavy rainfall.

Tornado in ROGERS, OKLAHOMA
From 11-MAY-17 13:01:00 to 11-MAY-17 13:08:00 (CST-6)
Location: COLLINSVILLE
Tornado F-scale: EF1
Property damage: 500.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A supercell thunderstorm rapidly developed near Owasso. A tornado developed as the storm approached N 161st E Avenue to the south of 106th Street N where tree limbs were snapped and barns were damaged. The tornado moved northeast damaging the roofs of about 70 homes, destroying outbuildings, uprooting trees, rolling camper trailers, and blowing down power poles between 106th Street N and 109th Street N. The tornado turned more east at about N 173rd E Avenue and then dissipated to the east of N 177th E Avenue. Based on this damage, maximum estimated wind in the tornado was 90 to 100 mph.

Tornado in ROGERS, OKLAHOMA
From 11-MAY-17 13:27:00 to 11-MAY-17 13:33:00 (CST-6)
Location: SAGEEYAH
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The Owasso tornado dissipated and the supercell thunderstorm that produced it cycled another tornado southeast of Oologah. The first damage from this tornado was on Northaven Road, north of the E 445 Road, where trees were damaged. From there, the tornado moved north-northeast uprooting and snapping trees. It crossed Highway 88 west of the N 4133 Road, where large tree limbs were snapped, and then dissipated north of Highway 88 where trees were uprooted just south of Lake Oologah. Based on this damage, maximum estimated wind in the tornado was 100 to 110 mph.

Tornado in WASHINGTON, OKLAHOMA
From 11-MAY-17 16:11:00 to 11-MAY-17 16:11:00 (CST-6)
Location: RAMONA
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A brief tornado was filmed by the KOTV helicopter over open country northeast of Ramona. An NWS survey team investigated the area, and was unable to find any damage in the suspected area that was accessible by road.

Hail in PAWNEE, OKLAHOMA
From 10-MAY-17 20:48:00 to 10-MAY-17 20:48:00 (CST-6)
Location: CLEVELAND
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in DELAWARE, OKLAHOMA
From 11-MAY-17 07:45:00 to 11-MAY-17 07:45:00 (CST-6)
Location: GROVE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in TULSA, OKLAHOMA
From 11-MAY-17 12:55:00 to 11-MAY-17 12:55:00 (CST-6)
Location: BROKEN ARROW
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in OKMULGEE, OKLAHOMA
From 11-MAY-17 12:26:00 to 11-MAY-17 12:26:00 (CST-6)
Location: OKMULGEE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in TULSA, OKLAHOMA
From 11-MAY-17 12:56:00 to 11-MAY-17 12:56:00 (CST-6)
Location: ALSUMA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in WAGONER, OKLAHOMA
From 11-MAY-17 12:59:00 to 11-MAY-17 12:59:00 (CST-6)
Location: BROKEN ARROW
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in TULSA, OKLAHOMA
From 11-MAY-17 13:30:00 to 11-MAY-17 13:30:00 (CST-6)
Location: OWASSO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in CREEK, OKLAHOMA
From 11-MAY-17 15:04:00 to 11-MAY-17 15:04:00 (CST-6)
Location: OILTON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in PAWNEE, OKLAHOMA
From 11-MAY-17 15:13:00 to 11-MAY-17 15:13:00 (CST-6)
Location: HALLETT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in CREEK, OKLAHOMA
From 11-MAY-17 15:15:00 to 11-MAY-17 15:15:00 (CST-6)
Location: OILTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in OSAGE, OKLAHOMA
From 11-MAY-17 15:35:00 to 11-MAY-17 15:35:00 (CST-6)
Location: PAWHUSKA
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in TULSA, OKLAHOMA
From 11-MAY-17 16:08:00 to 11-MAY-17 16:08:00 (CST-6)
Location: SAND SPGS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in TULSA, OKLAHOMA
From 11-MAY-17 16:30:00 to 11-MAY-17 16:30:00 (CST-6)
Location: SPERRY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in TULSA, OKLAHOMA
From 11-MAY-17 17:12:00 to 11-MAY-17 17:12:00 (CST-6)
Location: BROKEN ARROW
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in MAYES, OKLAHOMA
From 11-MAY-17 17:58:00 to 11-MAY-17 17:58:00 (CST-6)
Location: CHOUTEAU
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in CRAIG, OKLAHOMA
From 11-MAY-17 18:00:00 to 11-MAY-17 18:00:00 (CST-6)
Location: VINITA ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in MAYES, OKLAHOMA
From 11-MAY-17 18:19:00 to 11-MAY-17 18:19:00 (CST-6)
Location: LOCUST GROVE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in DELAWARE, OKLAHOMA
From 11-MAY-17 18:31:00 to 11-MAY-17 18:31:00 (CST-6)
Location: GROVE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CHEROKEE, OKLAHOMA
From 11-MAY-17 19:20:00 to 11-MAY-17 19:20:00 (CST-6)
Location: TAHLEQUAH
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in OSAGE, OKLAHOMA
From 11-MAY-17 15:25:00 to 11-MAY-17 15:25:00 (CST-6)
Location: PAWHUSKA
Magnitude: 1.75 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Post Office

Thunderstorm Wind in CREEK, OKLAHOMA
From 10-MAY-17 20:55:00 to 10-MAY-17 20:55:00 (CST-6)
Location: OILTON
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Strong thunderstorm wind blew down several trees.

Thunderstorm Wind in PAWNEE, OKLAHOMA
From 10-MAY-17 21:05:00 to 10-MAY-17 21:05:00 (CST-6)
Location: TERLTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind snapped large tree limbs.

Thunderstorm Wind in TULSA, OKLAHOMA
From 10-MAY-17 21:45:00 to 10-MAY-17 21:45:00 (CST-6)
Location: OWASSO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Strong thunderstorm wind snapped large tree limbs.

Thunderstorm Wind in CREEK, OKLAHOMA
From 10-MAY-17 21:35:00 to 10-MAY-17 21:35:00 (CST-6)
Location: SAPULPA
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 WAGONER, OKLAHOMA
From 10-MAY-17 22:35:00 to 10-MAY-17 22:35:00 (CST-6)
Location: LA BARGE
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong thunderstorm wind uprooted a tree and snapped large tree limbs.

Thunderstorm Wind in DELAWARE, OKLAHOMA
From 10-MAY-17 22:55:00 to 10-MAY-17 22:55:00 (CST-6)
Location: CHLOETA
Magnitude: 65.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong thunderstorm wind uprooted several trees, one of which fell onto a camper.

Thunderstorm Wind in DELAWARE, OKLAHOMA
From 10-MAY-17 23:05:00 to 10-MAY-17 23:05:00 (CST-6)
Location: JAY
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind blew down trees.

Thunderstorm Wind in TULSA, OKLAHOMA
From 11-MAY-17 13:00:00 to 11-MAY-17 13:00:00 (CST-6)
Location: BROKEN ARROW
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Strong thunderstorm wind snapped large tree limbs.

Hail in WAGONER, OKLAHOMA
From 11-MAY-17 13:00:00 to 11-MAY-17 13:00:00 (CST-6)
Location: BROKEN ARROW
Magnitude: 1.75 
Property damage: 20.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in OSAGE, OKLAHOMA
From 11-MAY-17 15:20:00 to 11-MAY-17 15:20:00 (CST-6)
Location: PAWHUSKA
Magnitude: 1.25 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in OSAGE, OKLAHOMA
From 11-MAY-17 15:20:00 to 11-MAY-17 15:20:00 (CST-6)
Location: HOMINY
Magnitude: 65.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind blew down several trees, snapped large tree limbs, and damaged the roof of a home.

Thunderstorm Wind in OSAGE, OKLAHOMA
From 11-MAY-17 15:33:00 to 11-MAY-17 15:33:00 (CST-6)
Location: BARNSDALL
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Strong thunderstorm wind snapped large tree limbs.

Thunderstorm Wind in OSAGE, OKLAHOMA
From 11-MAY-17 15:40:00 to 11-MAY-17 15:40:00 (CST-6)
Location: PEARSONIA
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Oklahoma Mesonet station east-southeast of Foraker measured 63 mph thunderstorm wind gusts.

Thunderstorm Wind in OSAGE, OKLAHOMA
From 11-MAY-17 16:01:00 to 11-MAY-17 16:01:00 (CST-6)
Location: SKIATOOK ARPT
Magnitude: 65.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

An amateur radio operator measured thunderstorm wind gusts to 75 mph.

Thunderstorm Wind in ROGERS, OKLAHOMA
From 11-MAY-17 16:54:00 to 11-MAY-17 16:54:00 (CST-6)
Location: CLAREMORE
Magnitude: 70.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind uprooted a tree, snapped numerous large tree limbs, and snapped power poles along Blue Starr Drive and Clubhouse Road on the northwest side of Claremore.

Thunderstorm Wind in MAYES, OKLAHOMA
From 11-MAY-17 17:32:00 to 11-MAY-17 17:32:00 (CST-6)
Location: PRYOR
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm wind gusted to near 70 mph north of Pryor.

Hail in ROGERS, OKLAHOMA
From 11-MAY-17 06:32:00 to 11-MAY-17 06:32:00 (CST-6)
Location: CLAREMORE
Magnitude: 1.25 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Hail in OSAGE, OKLAHOMA
From 10-MAY-17 15:35:00 to 10-MAY-17 15:35:00 (CST-6)
Location: SHIDLER ARPT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement