An outflow boundary was the focus for thunderstorm development during the evening of the 11th. Several supercells produced large hail before merging into a cluster of storms that led to several significant severe wind reports that lasted into the early morning of the 12th.

Tornado in CLEVELAND, OKLAHOMA
From 11-JUL-20 23:04:00 to 11-JUL-20 23:04:00 (CST-6)
Location: STANLEY DRAPER LAKE DAM
Tornado F-scale: EF0
Property damage: 20.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Embedded within the large area of damaging winds, NWS meteorologists observed a narrow path of enhanced damage with evidence of a convergence and rotation. A number of trees and the roof of a home were damaged by this brief tornado just north and northeast of 48th Avenue NE and Tecumseh Road in Norman.

Thunderstorm Wind in OKLAHOMA, OKLAHOMA
From 12-JUL-20 02:30:00 to 12-JUL-20 02:30:00 (CST-6)
Location: WHEATLAND
Magnitude: 56.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A couple small sheet metal buildings destroyed. Piece of wood pierced the windshield of a truck.

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 11-JUL-20 23:25:00 to 11-JUL-20 23:25:00 (CST-6)
Location: LEXINGTON
Magnitude: 65.00 EG
Property damage: 8000.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Four Chinook helicopters located outside at an Army Aviation Support Facility received damage to their rotor blades, with the blades being severely twisted and requiring replacement.

Hail in WOODWARD, OKLAHOMA
From 11-JUL-20 17:42:00 to 11-JUL-20 17:42:00 (CST-6)
Location: WOODWARD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in WOODWARD, OKLAHOMA
From 11-JUL-20 17:43:00 to 11-JUL-20 17:43:00 (CST-6)
Location: WOODWARD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GARFIELD, OKLAHOMA
From 11-JUL-20 17:44:00 to 11-JUL-20 17:44:00 (CST-6)
Location: LAHOMA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MAJOR, OKLAHOMA
From 11-JUL-20 17:46:00 to 11-JUL-20 17:46:00 (CST-6)
Location: AMES
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in GARFIELD, OKLAHOMA
From 11-JUL-20 17:52:00 to 11-JUL-20 17:52:00 (CST-6)
Location: LAHOMA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GARFIELD, OKLAHOMA
From 11-JUL-20 18:01:00 to 11-JUL-20 18:01:00 (CST-6)
Location: ENID
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in GARFIELD, OKLAHOMA
From 11-JUL-20 18:04:00 to 11-JUL-20 18:04:00 (CST-6)
Location: ENID
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in GARFIELD, OKLAHOMA
From 11-JUL-20 18:07:00 to 11-JUL-20 18:07:00 (CST-6)
Location: (END)VANCE AFB ENID
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Observation at KEND airport.

Hail in GARFIELD, OKLAHOMA
From 11-JUL-20 18:20:00 to 11-JUL-20 18:20:00 (CST-6)
Location: ENID
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Time estimated from radar.

Thunderstorm Wind in GARFIELD, OKLAHOMA
From 11-JUL-20 18:22:00 to 11-JUL-20 18:22:00 (CST-6)
Location: (WDG) WOODRING ARPT
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Hail in MAJOR, OKLAHOMA
From 11-JUL-20 18:28:00 to 11-JUL-20 18:28:00 (CST-6)
Location: AMES
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in GARFIELD, OKLAHOMA
From 11-JUL-20 18:30:00 to 11-JUL-20 18:30:00 (CST-6)
Location: BRECKINRIDGE
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in WOODWARD, OKLAHOMA
From 11-JUL-20 18:35:00 to 11-JUL-20 18:35:00 (CST-6)
Location: MOORELAND ARPT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WOODWARD, OKLAHOMA
From 11-JUL-20 18:40:00 to 11-JUL-20 18:40:00 (CST-6)
Location: MOORELAND
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in HARPER, OKLAHOMA
From 11-JUL-20 19:48:00 to 11-JUL-20 19:48:00 (CST-6)
Location: LAVERNE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thunderstorm Wind in ALFALFA, OKLAHOMA
From 11-JUL-20 19:55:00 to 11-JUL-20 19:55:00 (CST-6)
Location: CHEROKEE
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in GARFIELD, OKLAHOMA
From 11-JUL-20 20:13:00 to 11-JUL-20 20:13:00 (CST-6)
Location: HILLSDALE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in GRANT, OKLAHOMA
From 11-JUL-20 20:35:00 to 11-JUL-20 20:35:00 (CST-6)
Location: POND CREEK
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in GRANT, OKLAHOMA
From 11-JUL-20 20:49:00 to 11-JUL-20 20:49:00 (CST-6)
Location: RENFROW
Magnitude: 68.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in BLAINE, OKLAHOMA
From 11-JUL-20 22:15:00 to 11-JUL-20 22:15:00 (CST-6)
Location: WATONGA
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in KINGFISHER, OKLAHOMA
From 11-JUL-20 22:15:00 to 11-JUL-20 22:15:00 (CST-6)
Location: OKARCHE
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CANADIAN, OKLAHOMA
From 11-JUL-20 22:20:00 to 11-JUL-20 22:20:00 (CST-6)
Location: CONCHO
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in CANADIAN, OKLAHOMA
From 11-JUL-20 22:25:00 to 11-JUL-20 22:25:00 (CST-6)
Location: CONCHO
Magnitude: 60.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in CANADIAN, OKLAHOMA
From 11-JUL-20 22:35:00 to 11-JUL-20 22:35:00 (CST-6)
Location: YUKON
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in CANADIAN, OKLAHOMA
From 11-JUL-20 22:35:00 to 11-JUL-20 22:35:00 (CST-6)
Location: EL RENO
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in GRADY, OKLAHOMA
From 11-JUL-20 22:35:00 to 11-JUL-20 22:35:00 (CST-6)
Location: MINCO
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in CANADIAN, OKLAHOMA
From 11-JUL-20 22:40:00 to 11-JUL-20 22:40:00 (CST-6)
Location: MUSTANG
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several reports of tree damage.

Thunderstorm Wind in GRADY, OKLAHOMA
From 11-JUL-20 22:40:00 to 11-JUL-20 22:40:00 (CST-6)
Location: MINCO
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in OKLAHOMA, OKLAHOMA
From 11-JUL-20 22:40:00 to 11-JUL-20 22:40:00 (CST-6)
Location: (PWA)WILEY POST APT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in GRADY, OKLAHOMA
From 11-JUL-20 22:45:00 to 11-JUL-20 22:45:00 (CST-6)
Location: BRIDGE CREEK
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Significant damage to a greenhouse structure.

Thunderstorm Wind in MCCLAIN, OKLAHOMA
From 11-JUL-20 22:50:00 to 11-JUL-20 22:50:00 (CST-6)
Location: NEWCASTLE
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Estimated severe wind gust.

Thunderstorm Wind in CANADIAN, OKLAHOMA
From 11-JUL-20 22:54:00 to 11-JUL-20 22:54:00 (CST-6)
Location: CONCHO
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in OKLAHOMA, OKLAHOMA
From 11-JUL-20 22:54:00 to 11-JUL-20 22:54:00 (CST-6)
Location: (OKC)WILL ROGERS APT
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in CANADIAN, OKLAHOMA
From 11-JUL-20 22:55:00 to 11-JUL-20 22:55:00 (CST-6)
Location: PIEDMONT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 11-JUL-20 22:58:00 to 11-JUL-20 22:58:00 (CST-6)
Location: NORMAN
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Estimated at the National Weather Center.

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 11-JUL-20 22:58:00 to 11-JUL-20 22:58:00 (CST-6)
Location: (OUN)NORMAN WESTHEIMER ARPT
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Estimated severe wind gust.

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 11-JUL-20 23:00:00 to 11-JUL-20 23:00:00 (CST-6)
Location: (OUN)NORMAN WESTHEIMER ARPT
Magnitude: 68.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in OKLAHOMA, OKLAHOMA
From 11-JUL-20 23:01:00 to 11-JUL-20 23:01:00 (CST-6)
Location: (TIK)TINKER AFB
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 11-JUL-20 23:02:00 to 11-JUL-20 23:02:00 (CST-6)
Location: NORMAN
Magnitude: 65.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Numerous power lines snapped and downed trees in south Norman near Classen and Imhoff.

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 11-JUL-20 23:05:00 to 11-JUL-20 23:05:00 (CST-6)
Location: (OUN)NORMAN WESTHEIMER ARPT
Magnitude: 64.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in GRADY, OKLAHOMA
From 11-JUL-20 23:10:00 to 11-JUL-20 23:10:00 (CST-6)
Location: BRIDGE CREEK
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 11-JUL-20 23:15:00 to 11-JUL-20 23:15:00 (CST-6)
Location: (OUN)NORMAN WESTHEIMER ARPT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 11-JUL-20 23:19:00 to 11-JUL-20 23:19:00 (CST-6)
Location: (OUN)NORMAN WESTHEIMER ARPT
Magnitude: 70.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Measured at a personal weather station near Belmar golf course.

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 11-JUL-20 23:22:00 to 11-JUL-20 23:22:00 (CST-6)
Location: LEXINGTON
Magnitude: 74.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Near SH-39 and the Cleveland-Pottawatomie county line.

Thunderstorm Wind in CADDO, OKLAHOMA
From 11-JUL-20 23:25:00 to 11-JUL-20 23:25:00 (CST-6)
Location: STECKER
Magnitude: 59.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in CADDO, OKLAHOMA
From 11-JUL-20 23:36:00 to 11-JUL-20 23:36:00 (CST-6)
Location: ANADARKO
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in GARVIN, OKLAHOMA
From 11-JUL-20 23:45:00 to 11-JUL-20 23:45:00 (CST-6)
Location: STRATFORD
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in GARVIN, OKLAHOMA
From 11-JUL-20 23:50:00 to 11-JUL-20 23:50:00 (CST-6)
Location: STRATFORD
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in GRADY, OKLAHOMA
From 12-JUL-20 00:01:00 to 12-JUL-20 00:01:00 (CST-6)
Location: RUSH SPRINGS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Estimated severe wind gust.

Thunderstorm Wind in MURRAY, OKLAHOMA
From 12-JUL-20 00:05:00 to 12-JUL-20 00:05:00 (CST-6)
Location: SULPHUR
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Eight inch tree limbs snapped. Relayed via twitter.

Thunderstorm Wind in CARTER, OKLAHOMA
From 12-JUL-20 00:35:00 to 12-JUL-20 00:35:00 (CST-6)
Location: LONE GROVE
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in CARTER, OKLAHOMA
From 12-JUL-20 00:41:00 to 12-JUL-20 00:41:00 (CST-6)
Location: ARDMORE
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in COMANCHE, OKLAHOMA
From 12-JUL-20 01:17:00 to 12-JUL-20 01:17:00 (CST-6)
Location: MEERS
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CANADIAN, OKLAHOMA
From 12-JUL-20 01:25:00 to 12-JUL-20 01:25:00 (CST-6)
Location: CONCHO
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in CANADIAN, OKLAHOMA
From 12-JUL-20 01:35:00 to 12-JUL-20 01:35:00 (CST-6)
Location: EL RENO
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in ALFALFA, OKLAHOMA
From 11-JUL-20 20:18:00 to 11-JUL-20 20:18:00 (CST-6)
Location: GOLTRY
Magnitude: 78.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Significant structure damage to a bar in Goltry.

Thunderstorm Wind in OKLAHOMA, OKLAHOMA
From 11-JUL-20 23:00:00 to 11-JUL-20 23:00:00 (CST-6)
Location: MIDWEST CITY
Magnitude: 56.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Power lines reported downed in at least two locations in Midwest City.

Thunderstorm Wind in POTTAWATOMIE, OKLAHOMA
From 11-JUL-20 23:25:00 to 11-JUL-20 23:25:00 (CST-6)
Location: TROUSDALE
Magnitude: 74.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Damage to construction equipment and trees. Hwy 39 and Pottawatomie Rd.