A deepening upper/low pressure system slowly approached portions of the Central Plains on the 11th. Combined with increasing instability and wind shear, a favorable environment for severe weather (capable of producing all severe hazards) developed across much of western into central Oklahoma on the evening of the 11th. Numerous supercell thunderstorms developed and produced twelve tornadoes and large hail across portions of these areas.

Hail in CANADIAN, OKLAHOMA
From 11-MAY-23 17:56:00 to 11-MAY-23 17:56:00 (CST-6)
Location: MUSTANG
Magnitude: 0.75 
Reported by: Public

MPing report.

Hail in CANADIAN, OKLAHOMA
From 11-MAY-23 17:59:00 to 11-MAY-23 17:59:00 (CST-6)
Location: MUSTANG
Magnitude: 0.75 
Reported by: Public

MPing report.

Tornado in GRADY, OKLAHOMA
From 11-MAY-23 17:25:00 to 11-MAY-23 17:26:00 (CST-6)
Location: NORGE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A storm chaser south of Chickasha observed a small tornado north of Norge. No damage was observed or reported, and the tornado path is estimated. The tornado may not have been continuous along this path.

Tornado in GRADY, OKLAHOMA
From 11-MAY-23 17:57:00 to 11-MAY-23 18:08:00 (CST-6)
Location: TUTTLE
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Media and other storm chasers observed a tornado that moved north-northeast from about 4 miles south of Tuttle to about 2 miles southeast of Tuttle. No significant damage was reported in this area, and the specific path was estimated.

Tornado in GRADY, OKLAHOMA
From 11-MAY-23 18:36:00 to 11-MAY-23 18:38:00 (CST-6)
Location: BRIDGE CREEK
Tornado F-scale: EF0
Property damage: 2.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado was observed by storm chasers touching down near the Grady-McClain County line. An NWS storm survey team found tree damage and damage to a barn along County Road 1250 just west of the McClain County line. The tornado moved north-northeast and crossed into McClain County just north of County Road 1250.

Tornado in MCCLAIN, OKLAHOMA
From 11-MAY-23 18:38:00 to 11-MAY-23 18:38:00 (CST-6)
Location: BLANCHARD
Tornado F-scale: EF0
Property damage: 2.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado moved into McClain County from Grady County. An unanchored shed was blown over and rolled just inside the McClain County line before the tornado dissipated.

Tornado in MCCLAIN, OKLAHOMA
From 11-MAY-23 18:42:00 to 11-MAY-23 18:49:00 (CST-6)
Location: NEWCASTLE
Tornado F-scale: EF0
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A few minutes after the tornado near the Grady-McClain County line dissipated, another tornado was observed to develop moving from just south of the intersection of State Highway 76 and the H.E. Bailey Turnpike Spur in far northern Blanchard, east-northeast into the southwest edge of Newcastle. At least two homes suffered damage to shingles, and a few trees were damaged along path.

Tornado in GRADY, OKLAHOMA
From 11-MAY-23 19:04:00 to 11-MAY-23 19:07:00 (CST-6)
Location: ALEX
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Storm chasers reported a tornado that touched down in Grady County to the southwest of Dibble. Some tree damage was observed on County Street 2980.

Tornado in MCCLAIN, OKLAHOMA
From 11-MAY-23 19:12:00 to 11-MAY-23 19:13:00 (CST-6)
Location: DIBBLE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Tree damage was noted along 220th Street to the west of Dibble by a tornado.

Tornado in MCCLAIN, OKLAHOMA
From 11-MAY-23 19:29:00 to 11-MAY-23 19:59:00 (CST-6)
Location: COLE
Tornado F-scale: EF1
Property damage: 100.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado was observed by many spotters and storm chasers moving from southwest of Cole to Goldsby, remaining to the south of the damage path of the large EF3 tornado that affected Cole on April 19. This tornado was a multiple vortex tornado at times, developing initially 2 miles southwest of the center of Cole and move east-northeast through the southern portion of Cole producing tree and roof damage, including removing a large section of roof to a home just east of the Cole city limits. The tornado turned northeast towards Goldsby continuing to produce tree and roof damage. At the end of the path in Goldsby, the tornado took a hard left and moved northwest for the final half-mile dissipating just northwest of NW 12th Avenue and Center Road, crossing the damage path from the February 26 Goldsby-Norman Tornado along Center Road.

Tornado in CLEVELAND, OKLAHOMA
From 11-MAY-23 20:03:00 to 11-MAY-23 20:13:00 (CST-6)
Location: NOBLE
Tornado F-scale: EF1
Property damage: 200.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado developed in the Canadian River valley just to the west of Noble, then move east and northeast through the north side of town before dissipating southwest of the intersection of 48th Street and Post Oak Road. The most significant damage was just north of Highway 77 and Etowah Road where homes and businesses had significant roof damage.

Tornado in CLEVELAND, OKLAHOMA
From 11-MAY-23 20:33:00 to 11-MAY-23 20:33:00 (CST-6)
Location: LAKE THUNDERBIRD DAM
Tornado F-scale: EF0
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Media and other storm chasers and storm spotters observed a brief tornado in southeast Norman. Windows were broken and shingles were damaged on a mobile home near 96th Avenue SE to the south of State Highway 9.

Tornado in POTTAWATOMIE, OKLAHOMA
From 11-MAY-23 20:47:00 to 11-MAY-23 20:48:00 (CST-6)
Location: PEARSON
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Pottawatomie County storm spotters observed a brief tornado about 4 miles north-northwest of Asher, or about 2.5 miles southwest of Pearson. No damage was reported and the specific path is estimated.

Tornado in POTTAWATOMIE, OKLAHOMA
From 11-MAY-23 21:16:00 to 11-MAY-23 21:21:00 (CST-6)
Location: MAUD
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Television storm chasers observed a tornado west of Maud. An NWS storm survey team observed EF0 tree damage, although this tornado was likely stronger than EF0.

Tornado in GRADY, OKLAHOMA
From 11-MAY-23 18:45:00 to 11-MAY-23 18:45:00 (CST-6)
Location: RUSH SPRINGS
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A few spotters and chasers observed a brief tornado estimated to be 2 miles north-northwest of Rush Springs. No damage was reported.

Hail in COTTON, OKLAHOMA
From 11-MAY-23 16:20:00 to 11-MAY-23 16:20:00 (CST-6)
Location: TEMPLE
Magnitude: 1.00 
Reported by: Broadcast Media

Hail in CLEVELAND, OKLAHOMA
From 11-MAY-23 19:37:00 to 11-MAY-23 19:37:00 (CST-6)
Location: MOORE
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in CLEVELAND, OKLAHOMA
From 11-MAY-23 21:00:00 to 11-MAY-23 21:00:00 (CST-6)
Location: NOBLE
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in SEMINOLE, OKLAHOMA
From 11-MAY-23 21:09:00 to 11-MAY-23 21:09:00 (CST-6)
Location: BOWLEGS
Magnitude: 1.00 
Reported by: Emergency Manager

Hail in PONTOTOC, OKLAHOMA
From 11-MAY-23 22:03:00 to 11-MAY-23 22:03:00 (CST-6)
Location: STONEWALL
Magnitude: 1.00 
Reported by: Emergency Manager

Hail in COTTON, OKLAHOMA
From 11-MAY-23 16:22:00 to 11-MAY-23 16:22:00 (CST-6)
Location: TEMPLE
Magnitude: 0.75 
Reported by: Public

MPing report.

Hail in CLEVELAND, OKLAHOMA
From 11-MAY-23 21:04:00 to 11-MAY-23 21:04:00 (CST-6)
Location: NOBLE
Magnitude: 0.75 
Reported by: Public

MPing report.