Severe thunderstorms developed across eastern Oklahoma during the afternoon of the 27th, near an outflow boundary from previous storms, and ahead of a cold front. These storms eventually organized into a line and moved through southeastern Oklahoma during the evening. A tornado, large hail up to baseball size, and damaging wind occurred as the storms moved through the area. Some of the thunderstorms moved repeatedly over the same areas, and produced very heavy rainfall rates, which resulted in flash flooding.

Hail in OKMULGEE, OKLAHOMA
From 27-MAY-21 17:46:00 to 27-MAY-21 17:46:00 (CST-6)
Location: SCHULTER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in OKMULGEE, OKLAHOMA
From 27-MAY-21 18:11:00 to 27-MAY-21 18:11:00 (CST-6)
Location: DEWAR
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in PITTSBURG, OKLAHOMA
From 27-MAY-21 18:49:00 to 27-MAY-21 18:49:00 (CST-6)
Location: BOWLER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in MCINTOSH, OKLAHOMA
From 27-MAY-21 18:23:00 to 27-MAY-21 18:23:00 (CST-6)
Location: CHECOTAH
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind blew down several trees just east of Checotah.

Thunderstorm Wind in LATIMER, OKLAHOMA
From 27-MAY-21 19:42:00 to 27-MAY-21 19:42:00 (CST-6)
Location: RED OAK
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind blew down several trees on Boggy Road in Red Oak.

Hail in LE FLORE, OKLAHOMA
From 27-MAY-21 20:03:00 to 27-MAY-21 20:03:00 (CST-6)
Location: WHITESBORO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MCINTOSH, OKLAHOMA
From 27-MAY-21 18:32:00 to 27-MAY-21 18:32:00 (CST-6)
Location: EUFAULA
Magnitude: 1.75 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Public

Golf ball size hail damaged vehicles and homes.

Thunderstorm Wind in TULSA, OKLAHOMA
From 27-MAY-21 15:07:00 to 27-MAY-21 15:07:00 (CST-6)
Location: SPERRY
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong thunderstorm wind blew down several trees southeast of Sperry.

Thunderstorm Wind in OKFUSKEE, OKLAHOMA
From 27-MAY-21 16:44:00 to 27-MAY-21 16:44:00 (CST-6)
Location: WELTY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind snapped large tree limbs.

Hail in OKFUSKEE, OKLAHOMA
From 27-MAY-21 16:40:00 to 27-MAY-21 16:40:00 (CST-6)
Location: PADEN
Magnitude: 2.75 
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Baseball size hail damaged homes and vehicles.

Thunderstorm Wind in OKFUSKEE, OKLAHOMA
From 27-MAY-21 17:37:00 to 27-MAY-21 17:37:00 (CST-6)
Location: BEARDEN
Magnitude: 65.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind blew down trees and power poles in and around town.

Thunderstorm Wind in OKFUSKEE, OKLAHOMA
From 27-MAY-21 17:45:00 to 27-MAY-21 17:45:00 (CST-6)
Location: BEARDEN
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind blew down a tree and power poles.

Hail in OKFUSKEE, OKLAHOMA
From 27-MAY-21 17:55:00 to 27-MAY-21 17:55:00 (CST-6)
Location: CLEARVIEW
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flash Flood in NOWATA, OKLAHOMA
From 27-MAY-21 14:50:00 to 27-MAY-21 17:45:00 (CST-6)
Location: NOWATA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several roads were reported flooded on the southeast side of town.

Flash Flood in OSAGE, OKLAHOMA
From 27-MAY-21 14:43:00 to 27-MAY-21 18:00:00 (CST-6)
Location: PAWHUSKA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several roads were reported flooded on the east side of Pawhuska.

Flash Flood in TULSA, OKLAHOMA
From 27-MAY-21 15:45:00 to 27-MAY-21 18:30:00 (CST-6)
Location: OWASSO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of E 86th Street N were flooded and closed near Memorial Drive.

Flash Flood in TULSA, OKLAHOMA
From 27-MAY-21 16:01:00 to 27-MAY-21 18:30:00 (CST-6)
Location: SPERRY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of E 66th Street N were flooded and closed near Lewis Avenue.

Flash Flood in TULSA, OKLAHOMA
From 27-MAY-21 16:03:00 to 27-MAY-21 18:30:00 (CST-6)
Location: SPERRY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of E 106th Street N were flooded and closed, east of N Cincinnati Avenue to east of Bird Creek.

Flash Flood in TULSA, OKLAHOMA
From 27-MAY-21 16:05:00 to 27-MAY-21 18:30:00 (CST-6)
Location: COLLINSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Portions of E 146th Street N were flooded near N 5th Street in Collinsville.

Flash Flood in OSAGE, OKLAHOMA
From 27-MAY-21 16:00:00 to 27-MAY-21 18:00:00 (CST-6)
Location: TALLANT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Portions of County Road 2460 were flooded near Highway 11.

Flash Flood in TULSA, OKLAHOMA
From 27-MAY-21 16:21:00 to 27-MAY-21 18:30:00 (CST-6)
Location: OWASSO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Portions of E 116th Street N were flooded near N Garnett Road.

Thunderstorm Wind in MCINTOSH, OKLAHOMA
From 27-MAY-21 18:11:00 to 27-MAY-21 18:11:00 (CST-6)
Location: BOWER
Magnitude: 65.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Strong thunderstorm wind damaged a home.

Flash Flood in ROGERS, OKLAHOMA
From 27-MAY-21 16:45:00 to 27-MAY-21 18:30:00 (CST-6)
Location: COLLINSVILLE
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Social Media

Portions of E 96th Street N were flooded and closed near N 147th E Avenue. Portions of the roadway were washed away.

Flash Flood in ROGERS, OKLAHOMA
From 27-MAY-21 17:22:00 to 27-MAY-21 18:30:00 (CST-6)
Location: COLLINSVILLE
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Social Media

Portions of E 106th Street N were flooded and closed east of N 145th E Avenue. A vehicle was driven into the flood water and stalled.

Flash Flood in OKMULGEE, OKLAHOMA
From 27-MAY-21 18:10:00 to 27-MAY-21 20:30:00 (CST-6)
Location: OKMULGEE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous roads were flooded in and around Okmulgee.

Flash Flood in OKMULGEE, OKLAHOMA
From 27-MAY-21 18:06:00 to 27-MAY-21 20:30:00 (CST-6)
Location: MORRIS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of several roads were flooded in and around Morris.

Flash Flood in SEQUOYAH, OKLAHOMA
From 27-MAY-21 19:22:00 to 27-MAY-21 22:30:00 (CST-6)
Location: VIAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Portions of several roads in and around Vian were flooded.

Flash Flood in SEQUOYAH, OKLAHOMA
From 27-MAY-21 19:58:00 to 27-MAY-21 22:30:00 (CST-6)
Location: SALLISAW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of W Redwood Avenue were flooded.

Flash Flood in OKFUSKEE, OKLAHOMA
From 27-MAY-21 18:00:00 to 27-MAY-21 20:15:00 (CST-6)
Location: WELTY
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of several county roads were flooded and closed. Flood water eroded portions of these roads, as well as a new tin horn.

Flash Flood in OKFUSKEE, OKLAHOMA
From 27-MAY-21 17:30:00 to 27-MAY-21 18:15:00 (CST-6)
Location: PADEN
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of a county road and a large tin horn were eroded by flood waters.

Thunderstorm Wind in MCINTOSH, OKLAHOMA
From 27-MAY-21 18:18:00 to 27-MAY-21 18:18:00 (CST-6)
Location: RAIFORD
Magnitude: 56.00 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 27-MAY-21 13:55:00 to 27-MAY-21 13:55:00 (CST-6)
Location: AVANT
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm wind gusts were measured to 64 mph.

Hail in WASHINGTON, OKLAHOMA
From 27-MAY-21 14:07:00 to 27-MAY-21 14:07:00 (CST-6)
Location: OCHELATA
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in WASHINGTON, OKLAHOMA
From 27-MAY-21 14:15:00 to 27-MAY-21 14:15:00 (CST-6)
Location: VERA
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm wind gusts were estimated to 70 mph.

Tornado in MCINTOSH, OKLAHOMA
From 27-MAY-21 18:13:00 to 27-MAY-21 18:17:00 (CST-6)
Location: HANNA
Tornado F-scale: EF1
Property damage: 25.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado developed north of Highway 9 and west of Red Hill Road, where large tree limbs were snapped. The tornado moved east-southeast damaging a barn, uprooting a tree, and snapping large tree limbs as it moved along Highway 9. A home was damaged, several trees were uprooted, and a small tree was snapped as the tornado crossed the 4030 Road. It dissipated south of Highway 9 and east of the 4030 Road over open country. Based on this damage, maximum estimated wind in the tornado was 90 to 95 mph.

Thunderstorm Wind in OSAGE, OKLAHOMA
From 27-MAY-21 14:40:00 to 27-MAY-21 14:40:00 (CST-6)
Location: HOMINY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm wind gusts were estimated to 60 mph.

Thunderstorm Wind in OSAGE, OKLAHOMA
From 27-MAY-21 15:00:00 to 27-MAY-21 15:00:00 (CST-6)
Location: SKIATOOK ARPT
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm wind gusts were measured to 63 mph.

Thunderstorm Wind in WAGONER, OKLAHOMA
From 27-MAY-21 16:53:00 to 27-MAY-21 16:53:00 (CST-6)
Location: OKAY
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong thunderstorm wind blew down several power poles.