Thunderstorms developed over western Kansas during the evening of the 21st, to the north of a low pressure system centered over the Oklahoma Panhandle. These storms moved east-southeast and organized into a squall line as they moved into eastern Oklahoma during the early morning hours of the 22nd. The strongest storms produced damaging wind. Strong to severe thunderstorms redeveloped over southeastern Oklahoma during the evening near a stationary frontal boundary, as an upper level disturbance approached the region. A strongly unstable air mass across the area combined with strong deep layer wind shear to promote the development of supercell thunderstorms, several of which produced large hail up to baseball size and tornadoes.

Thunderstorm Wind in PAWNEE, OKLAHOMA
From 22-MAY-20 04:35:00 to 22-MAY-20 04:35:00 (CST-6)
Location: PAWNEE
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Oklahoma Mesonet station near Pawnee measured 65 mph thunderstorm wind gusts.

Hail in MAYES, OKLAHOMA
From 23-MAY-20 00:56:00 to 23-MAY-20 00:56:00 (CST-6)
Location: PRYOR
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in LE FLORE, OKLAHOMA
From 22-MAY-20 21:05:00 to 22-MAY-20 21:14:00 (CST-6)
Location: WHITESBORO
Tornado F-scale: EF1
Property damage: 30.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado developed south of Highway 63, and west of Flag Lake Road, where trees were uprooted. It moved east-northeast damaging a home, destroying an outbuilding, and uprooting more hardwood trees on 374th Avenue, before crossing Highway 63. The tornado continued east-northeast, uprooting trees on Camp Tom Hale Road and Bohannon Creek Lane, and then dissipated in heavily-wooded terrain north and west of NF6027. Based on this damage, maximum estimated wind in the tornado was 90 to 100 mph.

Tornado in LE FLORE, OKLAHOMA
From 22-MAY-20 20:58:00 to 22-MAY-20 21:02:00 (CST-6)
Location: TALIHINA
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado developed north of Highway 63, and east of Blagg Road, where softwood trees were snapped and uprooted. The tornado moved north-northeast, crossing Green Hill Road, where hardwood trees were uprooted, and large tree limbs were snapped. It dissipated in open country south of Highway 271. Based on this damage, maximum estimated wind in the tornado was 95 to 105 mph.

Hail in LE FLORE, OKLAHOMA
From 22-MAY-20 18:48:00 to 22-MAY-20 18:48:00 (CST-6)
Location: HOWE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in LE FLORE, OKLAHOMA
From 22-MAY-20 19:01:00 to 22-MAY-20 19:01:00 (CST-6)
Location: WISTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in HASKELL, OKLAHOMA
From 22-MAY-20 21:38:00 to 22-MAY-20 21:38:00 (CST-6)
Location: ENTERPRISE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in LATIMER, OKLAHOMA
From 22-MAY-20 20:32:00 to 22-MAY-20 20:33:00 (CST-6)
Location: DEGNAN
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tornado briefly developed over heavily-wooded terrain. It was witnessed by several storm spotters. A damage survey team could not access the area where the tornado likely occurred.

Thunderstorm Wind in SEQUOYAH, OKLAHOMA
From 22-MAY-20 07:55:00 to 22-MAY-20 07:55:00 (CST-6)
Location: VIAN
Magnitude: 56.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind blew down power lines and snapped large tree limbs.

Hail in LE FLORE, OKLAHOMA
From 22-MAY-20 19:22:00 to 22-MAY-20 19:22:00 (CST-6)
Location: HODGEN
Magnitude: 1.50 
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Ping pong ball size hail damaged vehicles and homes.

Hail in LE FLORE, OKLAHOMA
From 22-MAY-20 19:32:00 to 22-MAY-20 19:32:00 (CST-6)
Location: HEAVENER
Magnitude: 2.75 
Property damage: 40.00K
Crop damage: 0.00K
Reported by: Social Media

Baseball size hail damaged vehicles, homes, and businesses.

Tornado in LE FLORE, OKLAHOMA
From 22-MAY-20 21:15:00 to 22-MAY-20 21:22:00 (CST-6)
Location: WHITESBORO
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado developed in heavily-wooded terrain. It uprooted a few softwood trees as it crossed NF6027, and uprooted numerous softwood trees as it crossed NF6152. It was observed by a storm spotter. Based on this damage, maximum estimated wind in the tornado was 90 to 95 mph.

Thunderstorm Wind in OSAGE, OKLAHOMA
From 22-MAY-20 05:00:00 to 22-MAY-20 05:00:00 (CST-6)
Location: HOMINY
Magnitude: 65.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

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

Thunderstorm Wind in TULSA, OKLAHOMA
From 22-MAY-20 05:37:00 to 22-MAY-20 05:37:00 (CST-6)
Location: WEST TULSA
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

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

Hail in LE FLORE, OKLAHOMA
From 22-MAY-20 19:32:00 to 22-MAY-20 19:32:00 (CST-6)
Location: HEAVENER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golf ball size hail damaged vehicles and homes.

Thunderstorm Wind in CHOCTAW, OKLAHOMA
From 22-MAY-20 21:15:00 to 22-MAY-20 21:15:00 (CST-6)
Location: BOSWELL
Magnitude: 56.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind blew down a peach tree, snapped large tree limbs, and blew shingles from the roof of a home.

Thunderstorm Wind in TULSA, OKLAHOMA
From 22-MAY-20 05:43:00 to 22-MAY-20 05:43:00 (CST-6)
Location: LAKE STATION
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm wind gusts to 71 mph were measured along the Keystone Expressway, west of Tulsa.

Thunderstorm Wind in TULSA, OKLAHOMA
From 22-MAY-20 05:45:00 to 22-MAY-20 05:45:00 (CST-6)
Location: GARDEN CITY
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong thunderstorm wind blew down a tree near W 17th Street and S Denver Avenue.

Thunderstorm Wind in TULSA, OKLAHOMA
From 22-MAY-20 05:46:00 to 22-MAY-20 05:46:00 (CST-6)
Location: TURLEY
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Strong thunderstorm wind blew down trees in Turley.

Tornado in LE FLORE, OKLAHOMA
From 22-MAY-20 19:55:00 to 22-MAY-20 19:59:00 (CST-6)
Location: HEAVENER ARPT
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

This tornado was observed by several storm chasers. It occurred over heavily-wooded terrain that was inaccessible by road, thus a storm survey team was unable to review any damage that may have been produced by the tornado.