A powerful storm system moving through the southern Great Plains produced tornadoes, large hail, damaging winds and flooding across parts of Oklahoma and western north Texas on November 7-8, 2011.
The strong storm system generated severe weather including tornadoes, large hail, damaging winds and flooding from the early afternoon of November 7th through the early morning of November 8th. Several supercell thunderstorms developed over southwest Oklahoma during the mid-afternoon hours and moved northeast. One particularly nasty supercell thunderstorm developed over northern Wilbarger county in north Texas. This thunderstorm moved northeast into Tillman county, eventually producing at least eight tornadoes over a five county area. Two of the tornadoes moved near two Oklahoma Mesonet sites, both taking direct hits. The Mesonet site at Tipton measured 86.4 mph before it was destroyed. The Mesonet site near Fort Cobb measured 91.4 mph before it was destroyed. Both sites also recorded significant drops in surface pressure. Other supercells over southwest Oklahoma eventually congealed into a complex of storms and moved east into central Oklahoma. Numerous reports of high winds (92 mph near Clinton, OK) and hail up to golf ball-size were reported. The severe threat transitioned to a heavy rain and high threat after sunset.

Thunderstorm Wind in PAYNE, OKLAHOMA
From 07-NOV-11 20:30:00 to 07-NOV-11 20:30:00 (CST-6)
Location: PERKINS
Magnitude: 70.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in MCCLAIN, OKLAHOMA
From 07-NOV-11 22:45:00 to 07-NOV-11 22:45:00 (CST-6)
Location: NEWCASTLE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 07-NOV-11 23:06:00 to 07-NOV-11 23:06:00 (CST-6)
Location: (OUN)NORMAN WESTHEIMER ARPT
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

The wind gust was estimated near 12th Avenue NE and Tecumseh Road.

Thunderstorm Wind in JOHNSTON, OKLAHOMA
From 08-NOV-11 07:40:00 to 08-NOV-11 07:40:00 (CST-6)
Location: TISHOMINGO
Magnitude: 67.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 07-NOV-11 23:00:00 to 07-NOV-11 23:00:00 (CST-6)
Location: NORMAN
Magnitude: 61.00 EG
Reported by: Public

Damage was reported to hangars and planes at Max Westheimer Airport.

Hail in CADDO, OKLAHOMA
From 07-NOV-11 21:30:00 to 07-NOV-11 21:30:00 (CST-6)
Location: FT COBB
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Tornado in KIOWA, OKLAHOMA
From 07-NOV-11 15:38:00 to 07-NOV-11 15:38:00 (CST-6)
Location: SNYDER
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

This brief tornado occurred east of Snyder, north of US Highway 62. No known damage occurred with this tornado.

Tornado in KIOWA, OKLAHOMA
From 07-NOV-11 15:52:00 to 07-NOV-11 15:53:00 (CST-6)
Location: MOUNTAIN PARK
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

This tornado began just west of the Wichita Mountain Wildlife Refuge in Kiowa county, and continued northeast through the refuge, and then entered Kiowa county a 2nd time before lifting. This portion of the tornado was only briefly in Kiowa county with no known damage reported.

Thunderstorm Wind in CARTER, OKLAHOMA
From 08-NOV-11 07:15:00 to 08-NOV-11 07:15:00 (CST-6)
Location: DICKSON
Magnitude: 61.00 EG
Reported by: Emergency Manager

Power poles and lines were blown down. A few outbuildings were damaged and a utility trailer rolled.

Thunderstorm Wind in MARSHALL, OKLAHOMA
From 08-NOV-11 07:25:00 to 08-NOV-11 07:25:00 (CST-6)
Location: MADILL
Magnitude: 56.00 EG
Reported by: Emergency Manager

Numerous trees were blown down. Minor structural damage was also reported.

Tornado in TILLMAN, OKLAHOMA
From 07-NOV-11 15:15:00 to 07-NOV-11 15:26:00 (CST-6)
Location: MANITOU
Tornado F-scale: EF0
Reported by: NWS Storm Survey

Another large tornado developed west-northwest of Manitou, OK and moved north-northeast toward the Kiowa county border. The tornado crossed into Kiowa county just east of US Highway 183.

Tornado in CADDO, OKLAHOMA
From 07-NOV-11 16:51:00 to 07-NOV-11 17:17:00 (CST-6)
Location: CARNEGIE
Tornado F-scale: EF1
Reported by: NWS Storm Survey

Several storm spotters observed a tornado that moved 13 miles from southwest of Fort Cobb to Fort Cobb Lake to SW of Albert.  This tornado was observed to be multiple vortex at times. Near the beginning of the tornado path, a barn and cattle pens were damaged. As the tornado approached Fort Cobb Lake, the Oklahoma Mesonet weather station just south of Fort Cobb Lake reported a wind gust of 91 mph at 5:08 pm CST before a large irrigation pivot from a nearby field knocked the instrument tower down.

Tornado in KIOWA, OKLAHOMA
From 07-NOV-11 16:16:00 to 07-NOV-11 16:18:00 (CST-6)
Location: COOPERTON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

This large tornado continued into Kiowa county from Comanche county. The tornado dissipated about 1 mile east-northeast of the community of Saddle Mountain, shortly after entering the county for the 2nd time. No known damage occurred with this portion of the tornado.

Tornado in CADDO, OKLAHOMA
From 07-NOV-11 16:40:00 to 07-NOV-11 16:48:00 (CST-6)
Location: CARNEGIE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Several storm spotters observed a tornado southeast of Carnegie. This tornado moved about 3 miles to the northeast, but no reports of damage were received.

Thunderstorm Wind in MARSHALL, OKLAHOMA
From 08-NOV-11 07:15:00 to 08-NOV-11 07:15:00 (CST-6)
Location: LEBANON
Magnitude: 53.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in CADDO, OKLAHOMA
From 07-NOV-11 18:06:00 to 07-NOV-11 18:06:00 (CST-6)
Location: HYDRO
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Hail in JACKSON, OKLAHOMA
From 07-NOV-11 18:39:00 to 07-NOV-11 18:39:00 (CST-6)
Location: ALTUS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in JACKSON, OKLAHOMA
From 07-NOV-11 18:39:00 to 07-NOV-11 18:39:00 (CST-6)
Location: MARTHA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Tornado in TILLMAN, OKLAHOMA
From 07-NOV-11 14:59:00 to 07-NOV-11 14:59:00 (CST-6)
Location: TIPTON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A satellite tornado was observed rotating around the EF4 tornado south of Tipton.  No damage is known to have occurred from this tornado.

Hail in JACKSON, OKLAHOMA
From 07-NOV-11 18:41:00 to 07-NOV-11 18:41:00 (CST-6)
Location: BLAIR
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in JACKSON, OKLAHOMA
From 07-NOV-11 18:43:00 to 07-NOV-11 18:43:00 (CST-6)
Location: MARTHA
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Tornado in KIOWA, OKLAHOMA
From 07-NOV-11 16:19:00 to 07-NOV-11 16:22:00 (CST-6)
Location: COOPERTON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

This brief tornado occurred east-northeast of Saddle Mountain. No known damage occurred with the tornado.

Thunderstorm Wind in JACKSON, OKLAHOMA
From 07-NOV-11 19:12:00 to 07-NOV-11 19:12:00 (CST-6)
Location: (LTS)ALTUS AFB
Magnitude: 58.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The wind gust was measured at KLTS.

Thunderstorm Wind in JACKSON, OKLAHOMA
From 07-NOV-11 20:14:00 to 07-NOV-11 20:14:00 (CST-6)
Location: (LTS)ALTUS AFB
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Tornado in KIOWA, OKLAHOMA
From 07-NOV-11 16:24:00 to 07-NOV-11 16:26:00 (CST-6)
Location: COOPERTON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

This brief tornado occurred northeast of Saddle Mountain and just south of State Highway 19. No known damage occurred with the tornado.

Thunderstorm Wind in JACKSON, OKLAHOMA
From 07-NOV-11 20:15:00 to 07-NOV-11 20:15:00 (CST-6)
Location: ALTUS
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

The wind gust was measured at the Altus/Quartz Mountain Airport.

Thunderstorm Wind in PAYNE, OKLAHOMA
From 07-NOV-11 20:25:00 to 07-NOV-11 20:25:00 (CST-6)
Location: PERKINS
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in HARMON, OKLAHOMA
From 07-NOV-11 13:50:00 to 07-NOV-11 13:50:00 (CST-6)
Location: HOLLIS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GREER, OKLAHOMA
From 07-NOV-11 14:25:00 to 07-NOV-11 14:25:00 (CST-6)
Location: REED
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Tornado in MCCLAIN, OKLAHOMA
From 07-NOV-11 22:47:00 to 07-NOV-11 22:49:00 (CST-6)
Location: BLANCHARD
Tornado F-scale: EF1
Reported by: NWS Storm Survey

This tornado began northeast of Blanchard, paralleling Highway 62 on the north side. Most of the damage was confined to trees being snapped, with slightly more severe damage as the tornado crossed Highway 62, south of Highway 9. A barn lost most of its roof, with other roof/siding/awning damage to a residence as well. The tornado lifted prior to reaching the H.E. Bailey spur of I-44.

Tornado in JACKSON, OKLAHOMA
From 07-NOV-11 14:39:00 to 07-NOV-11 14:43:00 (CST-6)
Location: HESS
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado continued northeast from Wilbarger county, Texas into far southeast Jackson County, OK before moving into Tillman County. No known damage occurred in Jackson County.

Hail in GREER, OKLAHOMA
From 07-NOV-11 14:30:00 to 07-NOV-11 14:30:00 (CST-6)
Location: MANGUM
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in KIOWA, OKLAHOMA
From 07-NOV-11 15:20:00 to 07-NOV-11 15:20:00 (CST-6)
Location: LONE WOLF
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The hail was reported near the town of Lugert.

Tornado in TILLMAN, OKLAHOMA
From 07-NOV-11 14:43:00 to 07-NOV-11 15:13:00 (CST-6)
Location: TIPTON ARPT
Tornado F-scale: EF4
Reported by: NWS Storm Survey

This violent tornado continued northeast into Tillman county about 9 miles SSW of Tipton. The most severe damage occurred at the Oklahoma State University Agronomy Research Station. The buildings at the site were demolished, with most of the debris thrown into the nearby fields. The trees surrounding the site were debarked and splintered. Other damage was to the Tipton Mesonet site that took a direct hit. The wind speed maxed out at 86.4 mph before the site was demolished by flying debris. The tornado lifted about 3 miles NNE of Tipton.

Tornado in KIOWA, OKLAHOMA
From 07-NOV-11 15:26:00 to 07-NOV-11 15:27:00 (CST-6)
Location: SNYDER
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado continued into Kiowa County from Tillman County. The tornado only briefly entered the county before dissipating with no damage reported.

Thunderstorm Wind in KIOWA, OKLAHOMA
From 07-NOV-11 15:25:00 to 07-NOV-11 15:25:00 (CST-6)
Location: SNYDER
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The wind gust was estimated.

Hail in KIOWA, OKLAHOMA
From 07-NOV-11 15:50:00 to 07-NOV-11 15:50:00 (CST-6)
Location: SNYDER
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Hail in BECKHAM, OKLAHOMA
From 07-NOV-11 16:12:00 to 07-NOV-11 16:12:00 (CST-6)
Location: SAYRE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in KAY, OKLAHOMA
From 07-NOV-11 16:34:00 to 07-NOV-11 16:34:00 (CST-6)
Location: TONKAWA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in WASHITA, OKLAHOMA
From 07-NOV-11 16:48:00 to 07-NOV-11 16:48:00 (CST-6)
Location: BURNS FLAT
Magnitude: 80.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The wind gust was measured at KCSM.

Hail in WASHITA, OKLAHOMA
From 07-NOV-11 17:18:00 to 07-NOV-11 17:18:00 (CST-6)
Location: BESSIE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

The wind gusts were also estimated at 60 mph.

Hail in WASHITA, OKLAHOMA
From 07-NOV-11 17:31:00 to 07-NOV-11 17:31:00 (CST-6)
Location: CORN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

In addition to the hail, the winds were estimated at 60 mph.

Tornado in COMANCHE, OKLAHOMA
From 07-NOV-11 15:53:00 to 07-NOV-11 16:16:00 (CST-6)
Location: WICHITA MTNS NWR HQ
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

This large tornado developed just west of the Wichita Mountain Wildlife Refuge in Kiowa County, then moved northeast into Comanche County and over the refuge. An elk was killed in the park, but little other damage occurred, despite the large size of the tornado. The tornado moved back into Kiowa County near Saddle Mountain.