A stalled frontal boundary and anomalous moisture led to the development of numerous thunderstorms which produced large hail and a few damaging wind reports. Storms were slow moving and redeveloped over some of the same areas which led to widespread reports of flooding over much of central into southern Oklahoma on the evening of the 31st.

Hail in LINCOLN, OKLAHOMA
From 31-AUG-20 15:42:00 to 31-AUG-20 15:42:00 (CST-6)
Location: TRYON
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in GRADY, OKLAHOMA
From 31-AUG-20 15:50:00 to 31-AUG-20 15:50:00 (CST-6)
Location: TUTTLE
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in LINCOLN, OKLAHOMA
From 31-AUG-20 15:56:00 to 31-AUG-20 15:56:00 (CST-6)
Location: TRYON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in LINCOLN, OKLAHOMA
From 31-AUG-20 15:57:00 to 31-AUG-20 15:57:00 (CST-6)
Location: TRYON
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:14:00 to 31-AUG-20 17:14:00 (CST-6)
Location: NORMAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:15:00 to 31-AUG-20 17:15:00 (CST-6)
Location: NOBLE
Magnitude: 1.90 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:15:00 to 31-AUG-20 17:15:00 (CST-6)
Location: NOBLE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:15:00 to 31-AUG-20 20:15:00 (CST-6)
Location: NORMAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Street flooding.

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 16:48:00 to 31-AUG-20 16:48:00 (CST-6)
Location: NORMAN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 16:49:00 to 31-AUG-20 16:49:00 (CST-6)
Location: (OUN)NORMAN WESTHEIMER ARPT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 16:55:00 to 31-AUG-20 16:55:00 (CST-6)
Location: NORMAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in MCCLAIN, OKLAHOMA
From 31-AUG-20 17:00:00 to 31-AUG-20 17:00:00 (CST-6)
Location: GOLDSBY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Large tree downed.

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:00:00 to 31-AUG-20 17:00:00 (CST-6)
Location: NORMAN
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:04:00 to 31-AUG-20 17:04:00 (CST-6)
Location: NORMAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in MCCLAIN, OKLAHOMA
From 31-AUG-20 16:20:00 to 31-AUG-20 16:20:00 (CST-6)
Location: NEWCASTLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Flash Flood in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:07:00 to 31-AUG-20 20:07:00 (CST-6)
Location: NORMAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

About 1 ft of water over Boyd and Berry.  Still passable, but rising.

Hail in CANADIAN, OKLAHOMA
From 31-AUG-20 16:23:00 to 31-AUG-20 16:23:00 (CST-6)
Location: EL RENO
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 16:23:00 to 31-AUG-20 16:23:00 (CST-6)
Location: MOORE
Magnitude: 1.27 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 16:25:00 to 31-AUG-20 16:25:00 (CST-6)
Location: MOORE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 16:25:00 to 31-AUG-20 16:25:00 (CST-6)
Location: MOORE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in MCCLAIN, OKLAHOMA
From 31-AUG-20 16:43:00 to 31-AUG-20 16:43:00 (CST-6)
Location: NEWCASTLE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Some tree damage.

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 31-AUG-20 16:44:00 to 31-AUG-20 16:44:00 (CST-6)
Location: NORMAN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Estimated severe wind gust.

Flash Flood in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:56:00 to 31-AUG-20 20:56:00 (CST-6)
Location: (OUN)NORMAN WESTHEIMER ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Water covering road, impassable.

Hail in CANADIAN, OKLAHOMA
From 31-AUG-20 21:10:00 to 31-AUG-20 21:10:00 (CST-6)
Location: YUKON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Flash Flood in OKLAHOMA, OKLAHOMA
From 31-AUG-20 22:30:00 to 31-AUG-20 23:59:00 (CST-6)
Location: BETHANY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Several vehicles stranded in high water at 39TH and Macarthur.

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:17:00 to 31-AUG-20 17:17:00 (CST-6)
Location: NOBLE
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Flash Flood in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:17:00 to 31-AUG-20 20:17:00 (CST-6)
Location: NORMAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

One foot of water flowing over roadways on Melrose drive.

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:17:00 to 31-AUG-20 17:17:00 (CST-6)
Location: NOBLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:19:00 to 31-AUG-20 17:19:00 (CST-6)
Location: NOBLE
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:24:00 to 31-AUG-20 17:24:00 (CST-6)
Location: NOBLE
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Flash Flood in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:25:00 to 31-AUG-20 20:25:00 (CST-6)
Location: NORMAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Multiple cars stranded in flood waters. Lindsey and Elm avenue.

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:30:00 to 31-AUG-20 17:30:00 (CST-6)
Location: SLAUGHTERVILLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:11:00 to 31-AUG-20 17:11:00 (CST-6)
Location: NORMAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:11:00 to 31-AUG-20 17:11:00 (CST-6)
Location: NOBLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:13:00 to 31-AUG-20 17:13:00 (CST-6)
Location: NOBLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:29:00 to 31-AUG-20 17:29:00 (CST-6)
Location: NOBLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Lightning in MCCLAIN, OKLAHOMA
From 31-AUG-20 16:15:00 to 31-AUG-20 16:15:00 (CST-6)
Location: NEWCASTLE
Property damage: 400.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A large house was destroyed after being struck by lightning. Time of strike estimated from radar and surrounding reports.

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 16:16:00 to 31-AUG-20 16:16:00 (CST-6)
Location: MOORE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Flash Flood in OKLAHOMA, OKLAHOMA
From 31-AUG-20 22:30:00 to 31-AUG-20 23:59:00 (CST-6)
Location: (PWA)WILEY POST APT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A man attempted to drive through swiftly moving floodwater and his car became stranded. He moved to the hood of his car before being swept away, losing his life.

Hail in CLEVELAND, OKLAHOMA
From 31-AUG-20 16:20:00 to 31-AUG-20 16:20:00 (CST-6)
Location: MOORE
Magnitude: 1.32 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Flash Flood in CLEVELAND, OKLAHOMA
From 31-AUG-20 17:00:00 to 31-AUG-20 20:00:00 (CST-6)
Location: NORMAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Flooding west side of Norman by Sams on  36TH. Stranded cars.