Severe thunderstorms developed across southeastern Kansas and north central Oklahoma during the late afternoon of the 11th, as a cold front moved southward into the area. The atmosphere became extremely unstable over eastern Oklahoma ahead of the storms. Wind fields above the ground were also unseasonably strong, which resulted in very strong deep layer wind shear across the region. The combination of the extreme instability and very strong wind shear resulted in organized severe thunderstorms that moved through eastern Oklahoma during the evening, producing widespread damaging wind and large hail. A very moist air mass combined with intense thunderstorm activity also resulted in very heavy rain rates, and localized flash flooding.

Thunderstorm Wind in CHEROKEE, OKLAHOMA
From 11-JUL-20 20:00:00 to 11-JUL-20 20:00:00 (CST-6)
Location: HULBERT
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm wind gusts were measured to 70 mph.

Hail in TULSA, OKLAHOMA
From 11-JUL-20 20:07:00 to 11-JUL-20 20:07:00 (CST-6)
Location: OWASSO ARPT
Magnitude: 1.50 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Ping pong ball size hail damaged vehicles and homes.

Thunderstorm Wind in ROGERS, OKLAHOMA
From 11-JUL-20 19:55:00 to 11-JUL-20 19:55:00 (CST-6)
Location: CLAREMORE
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong thunderstorm wind blew down a large sign.

Hail in CHEROKEE, OKLAHOMA
From 11-JUL-20 20:17:00 to 11-JUL-20 20:17:00 (CST-6)
Location: TAHLEQUAH
Magnitude: 1.50 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Ping pong ball size hail damaged vehicles and homes.

Thunderstorm Wind in ADAIR, OKLAHOMA
From 11-JUL-20 20:20:00 to 11-JUL-20 20:20:00 (CST-6)
Location: STILWELL
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong thunderstorm wind blew down trees.

Thunderstorm Wind in ROGERS, OKLAHOMA
From 11-JUL-20 20:10:00 to 11-JUL-20 20:10:00 (CST-6)
Location: VERDIGRIS
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Strong thunderstorm wind blew down several trees.

Thunderstorm Wind in CHEROKEE, OKLAHOMA
From 11-JUL-20 20:17:00 to 11-JUL-20 20:17:00 (CST-6)
Location: TAHLEQUAH
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm wind gusts were estimated to 70 mph.

Thunderstorm Wind in TULSA, OKLAHOMA
From 11-JUL-20 20:27:00 to 11-JUL-20 20:27:00 (CST-6)
Location: TURLEY
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong thunderstorm wind blew down a large tree.

Thunderstorm Wind in WAGONER, OKLAHOMA
From 11-JUL-20 20:29:00 to 11-JUL-20 20:29:00 (CST-6)
Location: BROKEN ARROW
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm wind gusts were estimated to 70 mph.

Thunderstorm Wind in TULSA, OKLAHOMA
From 11-JUL-20 20:29:00 to 11-JUL-20 20:29:00 (CST-6)
Location: WEST TULSA
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind blew down a tree onto a car.

Thunderstorm Wind in TULSA, OKLAHOMA
From 11-JUL-20 20:32:00 to 11-JUL-20 20:32:00 (CST-6)
Location: TULSA
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind blew down several large trees.

Thunderstorm Wind in SEQUOYAH, OKLAHOMA
From 11-JUL-20 20:56:00 to 11-JUL-20 20:56:00 (CST-6)
Location: SALLISAW
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm wind gusts were measured to 62 mph.

Thunderstorm Wind in TULSA, OKLAHOMA
From 11-JUL-20 20:45:00 to 11-JUL-20 20:45:00 (CST-6)
Location: TULSA R L JONES ARPT
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS at KRVS Tulsa Richard Lloyd Jones Jr Riverside Airport measured 63 mph thunderstorm wind gusts.

Thunderstorm Wind in TULSA, OKLAHOMA
From 11-JUL-20 20:48:00 to 11-JUL-20 20:48:00 (CST-6)
Location: BIXBY
Magnitude: 65.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind blew down trees and damaged signs.

Thunderstorm Wind in CREEK, OKLAHOMA
From 11-JUL-20 21:12:00 to 11-JUL-20 21:12:00 (CST-6)
Location: SAPULPA
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm wind gusts were estimated to 70 mph.

Thunderstorm Wind in OKMULGEE, OKLAHOMA
From 11-JUL-20 21:04:00 to 11-JUL-20 21:04:00 (CST-6)
Location: BALD HILL
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind blew down trees.

Thunderstorm Wind in SEQUOYAH, OKLAHOMA
From 11-JUL-20 21:05:00 to 11-JUL-20 21:05:00 (CST-6)
Location: MULDROW
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm wind gusts were estimated to 70 mph.

Thunderstorm Wind in SEQUOYAH, OKLAHOMA
From 11-JUL-20 21:08:00 to 11-JUL-20 21:08:00 (CST-6)
Location: SALLISAW
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Strong thunderstorm wind blew down a tree.

Thunderstorm Wind in SEQUOYAH, OKLAHOMA
From 11-JUL-20 21:09:00 to 11-JUL-20 21:09:00 (CST-6)
Location: MULDROW
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm wind gusts were measured to 70 mph.

Thunderstorm Wind in OKMULGEE, OKLAHOMA
From 11-JUL-20 21:15:00 to 11-JUL-20 21:15:00 (CST-6)
Location: OKMULGEE ARPT
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The AWOS at the Okmulgee Regional Airport measured 63 mph thunderstorm wind gusts.

Thunderstorm Wind in LE FLORE, OKLAHOMA
From 11-JUL-20 21:15:00 to 11-JUL-20 21:15:00 (CST-6)
Location: SPIRO
Magnitude: 55.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind damaged a carport.

Hail in OTTAWA, OKLAHOMA
From 11-JUL-20 17:58:00 to 11-JUL-20 17:58:00 (CST-6)
Location: MIAMI
Magnitude: 1.25 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Half dollar size hail damage vehicles and homes.

Thunderstorm Wind in LE FLORE, OKLAHOMA
From 11-JUL-20 21:20:00 to 11-JUL-20 21:20:00 (CST-6)
Location: SCULLYVILLE
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Strong thunderstorm wind damaged the roof of a home, and destroyed a metal carport.

Thunderstorm Wind in LE FLORE, OKLAHOMA
From 11-JUL-20 21:25:00 to 11-JUL-20 21:25:00 (CST-6)
Location: ARKOMA
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong thunderstorm wind blew down trees.

Thunderstorm Wind in LE FLORE, OKLAHOMA
From 11-JUL-20 21:25:00 to 11-JUL-20 21:25:00 (CST-6)
Location: PANAMA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm wind gusts were estimated to 60 mph.

Thunderstorm Wind in LE FLORE, OKLAHOMA
From 11-JUL-20 21:30:00 to 11-JUL-20 21:30:00 (CST-6)
Location: WISTER
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Oklahoma Mesonet station near Wister measured 61 mph thunderstorm wind gusts.

Thunderstorm Wind in LE FLORE, OKLAHOMA
From 11-JUL-20 21:35:00 to 11-JUL-20 21:35:00 (CST-6)
Location: POTEAU KERR ARPT
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The AWOS at Robert S Kerr Airport in Poteau measured 60 mph thunderstorm wind gusts.

Thunderstorm Wind in LE FLORE, OKLAHOMA
From 11-JUL-20 21:35:00 to 11-JUL-20 21:35:00 (CST-6)
Location: WISTER
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Oklahoma Mesonet station near Wister measured 66 mph thunderstorm wind gusts.

Hail in OTTAWA, OKLAHOMA
From 11-JUL-20 18:15:00 to 11-JUL-20 18:15:00 (CST-6)
Location: FAIRLAND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in MCINTOSH, OKLAHOMA
From 11-JUL-20 21:47:00 to 11-JUL-20 21:47:00 (CST-6)
Location: EUFAULA
Magnitude: 65.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Law Enforcement

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

Thunderstorm Wind in OKMULGEE, OKLAHOMA
From 11-JUL-20 21:55:00 to 11-JUL-20 21:55:00 (CST-6)
Location: OKMULGEE ARPT
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The AWOS at the Okmulgee Regional Airport measured 73 mph thunderstorm wind gusts.

Thunderstorm Wind in LE FLORE, OKLAHOMA
From 11-JUL-20 22:00:00 to 11-JUL-20 22:00:00 (CST-6)
Location: SPIRO
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm wind gusts were estimated to 70 mph, and snapped large tree limbs.

Hail in OTTAWA, OKLAHOMA
From 11-JUL-20 18:26:00 to 11-JUL-20 18:26:00 (CST-6)
Location: FAIRLAND
Magnitude: 1.75 
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Golf ball size hail was reported by media storm chasers. The hail damaged a few homes and vehicles.

Thunderstorm Wind in CRAIG, OKLAHOMA
From 11-JUL-20 18:35:00 to 11-JUL-20 18:35:00 (CST-6)
Location: PYRAMID CORNERS
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Oklahoma Mesonet station north of Vinita measured 64 mph thunderstorm wind gusts.

Thunderstorm Wind in CRAIG, OKLAHOMA
From 11-JUL-20 18:36:00 to 11-JUL-20 18:36:00 (CST-6)
Location: CENTRALIA
Magnitude: 56.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong thunderstorm wind blew down power lines.

Thunderstorm Wind in LE FLORE, OKLAHOMA
From 11-JUL-20 22:00:00 to 11-JUL-20 22:00:00 (CST-6)
Location: WHITESBORO
Magnitude: 61.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Strong thunderstorm wind blew down a tree onto a house.

Thunderstorm Wind in PITTSBURG, OKLAHOMA
From 11-JUL-20 22:08:00 to 11-JUL-20 22:08:00 (CST-6)
Location: QUINTON
Magnitude: 55.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind snapped large tree limbs.

Thunderstorm Wind in PITTSBURG, OKLAHOMA
From 11-JUL-20 22:23:00 to 11-JUL-20 22:23:00 (CST-6)
Location: (MLC)MC ALESTER MUNI
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS at the McAlester Regional Airport measured 60 mph thunderstorm wind gusts.

Thunderstorm Wind in CRAIG, OKLAHOMA
From 11-JUL-20 18:40:00 to 11-JUL-20 18:40:00 (CST-6)
Location: PYRAMID CORNERS
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Oklahoma Mesonet station north of Vinita measured 66 mph thunderstorm wind gusts.

Thunderstorm Wind in MAYES, OKLAHOMA
From 11-JUL-20 19:10:00 to 11-JUL-20 19:10:00 (CST-6)
Location: ADAIR
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm wind gusts were estimated to 70 mph.

Thunderstorm Wind in MAYES, OKLAHOMA
From 11-JUL-20 19:12:00 to 11-JUL-20 19:12:00 (CST-6)
Location: DISNEY
Magnitude: 56.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind blew down power lines.

Thunderstorm Wind in LATIMER, OKLAHOMA
From 11-JUL-20 22:29:00 to 11-JUL-20 22:29:00 (CST-6)
Location: WILBURTON
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Strong thunderstorm wind snapped large tree limbs.

Thunderstorm Wind in CHOCTAW, OKLAHOMA
From 11-JUL-20 23:47:00 to 11-JUL-20 23:47:00 (CST-6)
Location: HUGO
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind snapped large tree limbs.

Thunderstorm Wind in LE FLORE, OKLAHOMA
From 11-JUL-20 21:45:00 to 11-JUL-20 21:55:00 (CST-6)
Location: WISTER
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Oklahoma Mesonet station near Wister measured thunderstorm wind gusts above 58 mph for more than 10 minutes. The highest gust during this period of time was measured at 63 mph.

Thunderstorm Wind in MAYES, OKLAHOMA
From 11-JUL-20 19:15:00 to 11-JUL-20 19:15:00 (CST-6)
Location: PRYOR
Magnitude: 65.00 EG
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind blew down trees onto homes.

Thunderstorm Wind in MAYES, OKLAHOMA
From 11-JUL-20 19:17:00 to 11-JUL-20 19:17:00 (CST-6)
Location: ADAIR
Magnitude: 61.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind snapped power poles.

Hail in NOWATA, OKLAHOMA
From 11-JUL-20 19:21:00 to 11-JUL-20 19:21:00 (CST-6)
Location: SOUTH COFFEEVILLE AR
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in LE FLORE, OKLAHOMA
From 11-JUL-20 21:40:00 to 11-JUL-20 21:40:00 (CST-6)
Location: POTEAU
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind blew down trees, and damaged the roof of a home.

Thunderstorm Wind in ROGERS, OKLAHOMA
From 11-JUL-20 19:23:00 to 11-JUL-20 19:23:00 (CST-6)
Location: OOLOGAH
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Thunderstorm wind gusts were estimated to 75 mph.

Thunderstorm Wind in MAYES, OKLAHOMA
From 11-JUL-20 19:25:00 to 11-JUL-20 19:25:00 (CST-6)
Location: PRYOR
Magnitude: 70.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm wind gusts were measured to 80 mph.

Thunderstorm Wind in MAYES, OKLAHOMA
From 11-JUL-20 19:25:00 to 11-JUL-20 19:25:00 (CST-6)
Location: SALINA
Magnitude: 71.00 EG
Property damage: 100.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind severely damaged the roofs of homes, and blew down multiple trees.

Thunderstorm Wind in MAYES, OKLAHOMA
From 11-JUL-20 19:30:00 to 11-JUL-20 19:30:00 (CST-6)
Location: LOCUST GROVE
Magnitude: 71.00 EG
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong thunderstorm wind destroyed a boat storage shed, blew down trees, and damaged homes.

Thunderstorm Wind in MAYES, OKLAHOMA
From 11-JUL-20 19:40:00 to 11-JUL-20 19:40:00 (CST-6)
Location: CHOUTEAU
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Strong thunderstorm wind blew down trees.

Thunderstorm Wind in DELAWARE, OKLAHOMA
From 11-JUL-20 19:44:00 to 11-JUL-20 19:44:00 (CST-6)
Location: WEST SILOAM SPGS
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong thunderstorm wind blew down a tree.

Thunderstorm Wind in ROGERS, OKLAHOMA
From 11-JUL-20 19:52:00 to 11-JUL-20 19:52:00 (CST-6)
Location: VERDIGRIS
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong thunderstorm wind blew down a tree.

Hail in ROGERS, OKLAHOMA
From 11-JUL-20 19:56:00 to 11-JUL-20 19:56:00 (CST-6)
Location: CLAREMORE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in TULSA, OKLAHOMA
From 11-JUL-20 19:57:00 to 11-JUL-20 19:57:00 (CST-6)
Location: COLLINSVILLE
Magnitude: 65.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind blew down several large trees.

Hail in DELAWARE, OKLAHOMA
From 11-JUL-20 18:32:00 to 11-JUL-20 18:35:00 (CST-6)
Location: GROVE
Magnitude: 1.75 
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Golf ball size hail damaged vehicles, homes, and businesses.

Hail in CRAIG, OKLAHOMA
From 11-JUL-20 18:10:00 to 11-JUL-20 18:10:00 (CST-6)
Location: WELCH
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Thunderstorm Wind in CRAIG, OKLAHOMA
From 11-JUL-20 18:10:00 to 11-JUL-20 18:10:00 (CST-6)
Location: WELCH
Magnitude: 61.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Strong thunderstorm wind blew down a tree and power lines.

Hail in OTTAWA, OKLAHOMA
From 11-JUL-20 18:13:00 to 11-JUL-20 18:13:00 (CST-6)
Location: NARCISSA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CRAIG, OKLAHOMA
From 11-JUL-20 18:20:00 to 11-JUL-20 18:20:00 (CST-6)
Location: CENTRALIA
Magnitude: 2.00 
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail larger than golf ball size was photographed. The hail damaged a couple homes and vehicles.

Thunderstorm Wind in MAYES, OKLAHOMA
From 11-JUL-20 19:19:00 to 11-JUL-20 19:19:00 (CST-6)
Location: GREEN
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Oklahoma Mesonet station near Pryor measured 60 mph thunderstorm wind gusts.