A broad low pressure center in the middle and upper atmosphere moved from northern Texas to northeastern Oklahoma on the 6th and 7th. The first round of thunderstorms affected southeastern Oklahoma during the morning and afternoon hours of the 6th. Locally heavy rainfall occurred, which resulted in isolated flash flooding.
A more pronounced and focused area of thunderstorms developed during the early morning hours of the 7th across northeastern Oklahoma. The storms were slow-moving, and very efficient rain producers due to high amounts of moisture in the air. A swath of heavy rain occurred across portions of McIntosh, Okfuskee, Okmulgee, Tulsa, and Pawnee Counties, where widespread two to eight inch amounts occurred. Personal weather stations in Okmulgee County measured over thirteen inches of rain in a several hour period, with rainfall rates as much as six and a half inches per hour. Widespread flash flooding occurred as a result of this heavy rainfall.

Flash Flood in TULSA, OKLAHOMA
From 07-JUN-21 06:00:00 to 07-JUN-21 07:15:00 (CST-6)
Location: BRUNER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Several roads were reported flooded, including eastbound portions of I-44 between Highway 75 and I-244.

Flash Flood in OKMULGEE, OKLAHOMA
From 07-JUN-21 07:06:00 to 07-JUN-21 10:30:00 (CST-6)
Location: HENRYETTA
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Portions of several county roads were flooded and closed.

Flash Flood in LE FLORE, OKLAHOMA
From 06-JUN-21 12:32:00 to 06-JUN-21 14:30:00 (CST-6)
Location: WHITESBORO
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Portions of several roads were reported flooded. A couple vehicles were stranded in the flood water.

Flash Flood in OKMULGEE, OKLAHOMA
From 07-JUN-21 03:03:00 to 07-JUN-21 12:00:00 (CST-6)
Location: OKMULGEE
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 town, including Highway 75 near 13th Street.

Flash Flood in OKFUSKEE, OKLAHOMA
From 07-JUN-21 05:45:00 to 07-JUN-21 07:45:00 (CST-6)
Location: OKFUSKEE
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Portions of numerous county roads were flooded. Some roads had sections that were washed out by flood waters.

Flash Flood in PAWNEE, OKLAHOMA
From 07-JUN-21 08:23:00 to 07-JUN-21 09:00:00 (CST-6)
Location: HALLETT
Flood cause: Heavy Rain
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Several county roads were reported flooded. Portions of Cimmaron Ranch Road were washed out.

Flash Flood in OKMULGEE, OKLAHOMA
From 07-JUN-21 07:30:00 to 07-JUN-21 11:00:00 (CST-6)
Location: MURDELL
Flood cause: Heavy Rain
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flood waters affected eleven homes. Multiple swift water rescues were conducted.

Flash Flood in MCINTOSH, OKLAHOMA
From 07-JUN-21 06:30:00 to 07-JUN-21 08:30:00 (CST-6)
Location: BRUSH HILL
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Department of Highways

Portions of Highway 150 were washed out by flood water.