A strong upper level disturbance translated from the Southern Rockies into the Southern Plains on the 16th. Very moist and unstable air was in place across the Southern Plains as this system approached. Severe thunderstorms developed over western Oklahoma and northwestern Texas during the afternoon and moved eastward into eastern Oklahoma in the late evening. By the time the storms reached eastern Oklahoma, a well-organized squall line had evolved but due to very strong low level wind shear, multiple tornadoes occurred across the area along with widespread damaging wind. Locally heavy rainfall resulted in flash flooding in some areas through the early morning hours of the 17th.

Thunderstorm Wind in OSAGE, OKLAHOMA
From 16-MAY-15 21:39:00 to 16-MAY-15 21:39:00 (CST-6)
Location: SKIATOOK
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Oklahoma Mesonet station near Skiatook measured thunderstorm wind gusts to 59 mph.

Thunderstorm Wind in WASHINGTON, OKLAHOMA
From 16-MAY-15 21:45:00 to 16-MAY-15 21:45:00 (CST-6)
Location: COPAN
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

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

Tornado in ROGERS, OKLAHOMA
From 16-MAY-15 22:40:00 to 16-MAY-15 22:41:00 (CST-6)
Location: INOLA
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This is the second segment of a two segment tornado. In Rogers County, this tornado uprooted numerous trees north of the Verdigris River. Based on this damage, maximum estimated wind in this segment of the tornado was 90 to 100 mph.

Thunderstorm Wind in ROGERS, OKLAHOMA
From 16-MAY-15 22:51:00 to 16-MAY-15 22:51:00 (CST-6)
Location: TIAWAH
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Strong thunderstorm wind snapped large tree limbs west of the Claremore Airport.

Hail in CRAIG, OKLAHOMA
From 16-MAY-15 23:36:00 to 16-MAY-15 23:36:00 (CST-6)
Location: VINITA
Magnitude: 1.75 
Property damage: 15.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CHEROKEE, OKLAHOMA
From 16-MAY-15 23:50:00 to 16-MAY-15 23:50:00 (CST-6)
Location: TAHLEQUAH
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm wind gusts were estimated to 65 mph.

Thunderstorm Wind in DELAWARE, OKLAHOMA
From 16-MAY-15 23:52:00 to 16-MAY-15 23:52:00 (CST-6)
Location: JAY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm wind gusts were estimated to 60 mph.

Flash Flood in SEQUOYAH, OKLAHOMA
From 17-MAY-15 00:49:00 to 17-MAY-15 06:00:00 (CST-6)
Location: GORE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Highway 10 outside of Gore was flooded and closed.

Thunderstorm Wind in WASHINGTON, OKLAHOMA
From 16-MAY-15 21:45:00 to 16-MAY-15 21:45:00 (CST-6)
Location: VERA
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm wind gusts were estimated to 65 mph.

Thunderstorm Wind in OKMULGEE, OKLAHOMA
From 16-MAY-15 22:00:00 to 16-MAY-15 22:00:00 (CST-6)
Location: HECTOR
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm wind gusts were measured to 58 mph.

Thunderstorm Wind in TULSA, OKLAHOMA
From 16-MAY-15 22:05:00 to 16-MAY-15 22:05:00 (CST-6)
Location: WEST TULSA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong thunderstorm wind snapped large tree limbs in downtown Tulsa.

Tornado in ROGERS, OKLAHOMA
From 16-MAY-15 22:52:00 to 16-MAY-15 22:56:00 (CST-6)
Location: TIAWAH
Tornado F-scale: EF1
Property damage: 30.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado appears to have developed on the Claremore Airport property and moved northeast across Highway 20, ending about a half mile west of the Mayes County line south of the E 470 Road. The tornado damaged several homes near Highway 20. It also uprooted trees, snapped numerous large tree limbs, and blew down power poles. Based on this damage, maximum estimated wind in the tornado was 90 to 100 mph.

Thunderstorm Wind in MAYES, OKLAHOMA
From 16-MAY-15 23:02:00 to 16-MAY-15 23:02:00 (CST-6)
Location: PRYOR
Magnitude: 61.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Strong thunderstorm wind damaged two wood-framed outbuildings.

Tornado in MAYES, OKLAHOMA
From 16-MAY-15 23:00:00 to 16-MAY-15 23:03:00 (CST-6)
Location: PRYOR
Tornado F-scale: EF1
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado snapped or uprooted numerous trees and blew down power poles. Based on this damage, maximum estimated wind in the tornado was 95 to 105 mph.

Thunderstorm Wind in TULSA, OKLAHOMA
From 16-MAY-15 22:17:00 to 16-MAY-15 22:17:00 (CST-6)
Location: ATLANTIC
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Strong thunderstorm wind damaged a barn and snapped large tree limbs.

Flash Flood in CHEROKEE, OKLAHOMA
From 17-MAY-15 01:00:00 to 17-MAY-15 06:00:00 (CST-6)
Location: MELVIN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Portions of Highway 80 were closed between Highway 51 and Highway 62.

Flash Flood in PITTSBURG, OKLAHOMA
From 17-MAY-15 01:00:00 to 17-MAY-15 06:00:00 (CST-6)
Location: HAYWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Highway 31 was closed from the Indian Nations Turnpike, west to Haywood due to flooding.

Flash Flood in SEQUOYAH, OKLAHOMA
From 17-MAY-15 01:30:00 to 17-MAY-15 06:00:00 (CST-6)
Location: SALLISAW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several low water crossings were severely flooded and impassable due to flooding.

Flash Flood in SEQUOYAH, OKLAHOMA
From 17-MAY-15 01:30:00 to 17-MAY-15 06:00:00 (CST-6)
Location: GANS
Flood cause: Heavy Rain
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A small bridge was washed out by flooding. The 1070 Road was closed due to high water.

Thunderstorm Wind in TULSA, OKLAHOMA
From 16-MAY-15 22:33:00 to 16-MAY-15 22:33:00 (CST-6)
Location: (TUL)TULSA INTL ARPT
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The ASOS system at the Tulsa International Airport measured 63 mph thunderstorm wind gusts.

Tornado in MAYES, OKLAHOMA
From 16-MAY-15 23:10:00 to 16-MAY-15 23:16:00 (CST-6)
Location: ADAIR
Tornado F-scale: EF1
Property damage: 75.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado damaged two homes, destroyed at least two outbuildings, snapped or uprooted trees, and blew down power poles. Based on this damage, maximum estimated wind in the tornado was 95 to 105 mph.

Thunderstorm Wind in TULSA, OKLAHOMA
From 16-MAY-15 22:46:00 to 16-MAY-15 22:46:00 (CST-6)
Location: OWASSO
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm wind gusts were estimated to 65 mph.

Thunderstorm Wind in ROGERS, OKLAHOMA
From 16-MAY-15 22:48:00 to 16-MAY-15 22:48:00 (CST-6)
Location: INOLA ARPT
Magnitude: 65.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm wind gusts were estimated to 75 mph.

Thunderstorm Wind in MAYES, OKLAHOMA
From 16-MAY-15 22:59:00 to 16-MAY-15 22:59:00 (CST-6)
Location: PRYOR
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Strong thunderstorm wind blew down numerous large tree limbs and small trees.

Tornado in CRAIG, OKLAHOMA
From 16-MAY-15 23:24:00 to 16-MAY-15 23:25:00 (CST-6)
Location: TODD
Tornado F-scale: EF1
Property damage: 50.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This is the first segment of a two segment tornado. In Craig County, this tornado destroyed a mobile home and snapped or uprooted trees. Based on this damage, maximum estimated wind in this segment of the tornado was 95 to 105 mph.

Tornado in DELAWARE, OKLAHOMA
From 16-MAY-15 23:25:00 to 16-MAY-15 23:29:00 (CST-6)
Location: CLEORA
Tornado F-scale: EF1
Property damage: 50.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This is the second segment of a two segment tornado. In Delaware County, this tornado destroyed several barns and outbuildings, snapped or uprooted trees, and blew down power poles. Based on this damage, maximum estimated wind in this segment of the tornado was 95 to 105 mph.

Flash Flood in LE FLORE, OKLAHOMA
From 17-MAY-15 02:40:00 to 17-MAY-15 06:00:00 (CST-6)
Location: WISTER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

US 270 was closed due to high water just south of the junction with US 271.

Tornado in OTTAWA, OKLAHOMA
From 16-MAY-15 23:38:00 to 16-MAY-15 23:50:00 (CST-6)
Location: FAIRLAND
Tornado F-scale: EF1
Property damage: 125.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado developed just south of the E 230 Road and moved north-northeast destroying a mobile home, destroying several outbuildings, and snapping or uprooting trees. As the tornado approached the E 190 Road near the S 600 Road, it turned more to the northeast. Numerous trees were snapped or uprooted, a home was damaged, and outbuildings were damaged between the E 190 Road and Grand Lake. After moving over Grand Lake, the tornado damaged chicken houses and snapped or uprooted trees before dissipating east of Highway 10 near the E 160 Road. Based on this damage, maximum estimated wind in the tornado was 95 to 105 mph.

Hail in OKFUSKEE, OKLAHOMA
From 16-MAY-15 21:02:00 to 16-MAY-15 21:02:00 (CST-6)
Location: CASTLE
Magnitude: 2.75 
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Public

Tornado in OKFUSKEE, OKLAHOMA
From 16-MAY-15 21:20:00 to 16-MAY-15 21:21:00 (CST-6)
Location: OKEMAH ARPT
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A tornado uprooted trees and snapped large tree limbs. Based on this damage, estimated maximum wind in the tornado was 90 to 100 mph.

Flash Flood in LATIMER, OKLAHOMA
From 17-MAY-15 03:00:00 to 17-MAY-15 06:00:00 (CST-6)
Location: PATTERSON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Park/Forest Service

Fourche Maline River was flooded in several locations, inundating nearby county roads.

Tornado in WAGONER, OKLAHOMA
From 16-MAY-15 22:26:00 to 16-MAY-15 22:40:00 (CST-6)
Location: KADASHAN
Tornado F-scale: EF2
Property damage: 2.00M
Crop damage: 0.00K
Reported by: NWS Storm Survey

This is the first segment of a two segment tornado. The tornado developed just east of the Tulsa/Wagoner County line near E 131st St South. It moved rapidly northeast damaging as many as 120 homes, some severely, destroying barns and outbuildings, snapping and uprooting many trees, and snapping power poles. Based on this damage, maximum estimated wind in this segment of the tornado was 110 to 120 mph.

Thunderstorm Wind in OSAGE, OKLAHOMA
From 16-MAY-15 21:10:00 to 16-MAY-15 21:10:00 (CST-6)
Location: WYNONA
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

The Oklahoma Mesonet station near Wynona measured 58 mph thunderstorm wind gusts.

Thunderstorm Wind in WAGONER, OKLAHOMA
From 16-MAY-15 23:00:00 to 16-MAY-15 23:00:00 (CST-6)
Location: LA BARGE
Magnitude: 70.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Strong thunderstorm wind blew down several trees, snapped numerous large tree limbs, and damaged the roofs of homes.

Thunderstorm Wind in MUSKOGEE, OKLAHOMA
From 16-MAY-15 23:04:00 to 16-MAY-15 23:04:00 (CST-6)
Location: MUSKOGEE
Magnitude: 70.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind blew down a tree onto a carport.

Thunderstorm Wind in MUSKOGEE, OKLAHOMA
From 16-MAY-15 23:10:00 to 16-MAY-15 23:10:00 (CST-6)
Location: MUSKOGEE
Magnitude: 70.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees were blown down by strong thunderstorm wind in and around town.

Tornado in DELAWARE, OKLAHOMA
From 16-MAY-15 23:30:00 to 16-MAY-15 23:36:00 (CST-6)
Location: BERNICE
Tornado F-scale: EF1
Property damage: 20.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This is the first segment of a two segment tornado. In Delaware County, this tornado damaged two mobile homes, snapped or uprooted numerous trees, and blew down power poles. Based on this damage, maximum estimated wind in this segment of the tornado was 95 to 105 mph.

Tornado in OTTAWA, OKLAHOMA
From 16-MAY-15 23:51:00 to 16-MAY-15 23:53:00 (CST-6)
Location: WYANDOTTE
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This is the first segment of a two segment tornado. In Ottawa County, this tornado snapped large tree limbs as it crossed the E 175 Road and uprooted trees near the state line, north of the S 700 Road. Based on this damage, maximum estimated wind in this segment of the tornado was 90 to 100 mph. This tornado continued into Newton County, MO.

Tornado in OTTAWA, OKLAHOMA
From 16-MAY-15 23:36:00 to 16-MAY-15 23:38:00 (CST-6)
Location: AFTON
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This is the second segment of a two segment tornado. In Ottawa County, this tornado uprooted trees. Based on this damage, maximum estimated wind in this segment of the tornado was 90 to 100 mph.

Thunderstorm Wind in MCINTOSH, OKLAHOMA
From 16-MAY-15 23:18:00 to 16-MAY-15 23:18:00 (CST-6)
Location: EUFAULA
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 OSAGE, OKLAHOMA
From 16-MAY-15 21:30:00 to 16-MAY-15 21:30:00 (CST-6)
Location: SKIATOOK ARPT
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

A gazebo was damaged by strong thunderstorm wind.

Thunderstorm Wind in OSAGE, OKLAHOMA
From 16-MAY-15 21:30:00 to 16-MAY-15 21:30:00 (CST-6)
Location: SKIATOOK
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm wind gusts were estimated to 60 mph.

Tornado in ROGERS, OKLAHOMA
From 16-MAY-15 22:43:00 to 16-MAY-15 22:51:00 (CST-6)
Location: INOLA
Tornado F-scale: EF2
Property damage: 1.00M
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado developed near Highway 412, west-northwest of Inola. The tornado was at its widest and appeared to be strongest, creating the most damage between Highways 412 and 88. In that area, it damaged dozens of homes, some severely, destroyed barns and outbuildings, snapped or uprooted numerous trees, and snapped power poles. Damage northeast of Highway 88 through its end point southeast of the Claremore Airport was mainly to trees and barns. Based on this damage, maximum estimated wind in the tornado was 110 to 120 mph.