A significant outbreak of severe thunderstorms and tornadoes affected a large part of northern, central, and southern Oklahoma. Tornadoes were most numerous across central and southern Oklahoma, with significant damage occurring over many areas.
Severe thunderstorms erupted by mid afternoon across northern and western Oklahoma. Given the potent combination of ingredients in place, storms began to produce tornadoes quickly after initiation. Storm motions of 50 to 60 mph were common.
During the mid afternoon hours, severe weather was confined to northern Oklahoma. It was there a long track supercell storm produced tornadoes near the Kansas border - including one rated EF3 - from near Wakita to north of Braman.
The capping inversion that had delayed thunderstorm development into central Oklahoma weakened, allowing for explosive supercell development along the dry line along and west of the Interstate 35 corridor. Rapid development and intensification was common with the late afternoon storms, with storms becoming tornadic within a very short time after initiation. This round of storms would directly impact a large part of the Oklahoma City metro area at rush hour, and posed a significant threat to the area. The first tornado in this area occurred in Canadian County.
During the next several hours, tornadoes were clustered around the metro area, and at times there were multiple significant damaging tornadoes occurring simultaneously. Several of the tornadoes had long tracks. Damage from the tornadoes was substantial, with numerous structures, vehicles, trees and power poles/lines significantly damaged or destroyed. One of the more intense tornadoes moved across Lake Thunderbird east of Norman destroying numerous boats.
More storms developed across southwest and south central Oklahoma, and also quickly became tornadic.
By 9 pm, 35 tornadoes had been reported. While the loss of three lives was tragic, the casualties could have been much higher given the storm's fast motions, their intensity, the time of day and the areas impacted.
While exact monetary damage figures were not available, it is estimated that losses were in excess of $595 million. At least 450 sustained injuries, most of them minor. Unfortunately three people lost their lives.
Note: The large number of injuries and tornadoes made it difficult to associate injuries with specific tornadoes. Injury numbers were included when we had confidence in the numbers.
Note: The complex nature of storm evolutions and interactions made the job of classifying tornadoes difficult. This represents our best scientific assessment based on ground and aerial surveys, data from multiple radars, photographic and video evidence and anecdotal information.

Hail in JEFFERSON, OKLAHOMA
From 10-MAY-10 16:32:00 to 10-MAY-10 16:32:00 (CST-6)
Location: RYAN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 10-MAY-10 16:32:00 to 10-MAY-10 16:32:00 (CST-6)
Location: NORMAN
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

A 56 knot wind gust was measured at the National Weather Center as the tornado moved south of the building.

Hail in PAYNE, OKLAHOMA
From 10-MAY-10 16:20:00 to 10-MAY-10 16:35:00 (CST-6)
Location: LAKE CARL BLACKWELL DAM
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

The hail was reported near 116th Street and Coyle Road.

Hail in JEFFERSON, OKLAHOMA
From 10-MAY-10 17:00:00 to 10-MAY-10 17:00:00 (CST-6)
Location: GRADY
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CARTER, OKLAHOMA
From 10-MAY-10 17:20:00 to 10-MAY-10 17:20:00 (CST-6)
Location: DICKSON
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CLEVELAND, OKLAHOMA
From 10-MAY-10 17:25:00 to 10-MAY-10 17:25:00 (CST-6)
Location: NORMAN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

The hail was reported at the National Weather Center.

Hail in LOVE, OKLAHOMA
From 10-MAY-10 17:30:00 to 10-MAY-10 17:30:00 (CST-6)
Location: MARIETTA
Magnitude: 4.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in MURRAY, OKLAHOMA
From 10-MAY-10 17:30:00 to 10-MAY-10 17:30:00 (CST-6)
Location: DAVIS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The report was relayed by the NWS Amarillo.

Hail in LINCOLN, OKLAHOMA
From 10-MAY-10 17:50:00 to 10-MAY-10 17:50:00 (CST-6)
Location: MEEKER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in LOVE, OKLAHOMA
From 10-MAY-10 17:40:00 to 10-MAY-10 17:50:00 (CST-6)
Location: LAKE MURRAY DAM
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The hail was reported at the Lake Murry Marina.

Hail in POTTAWATOMIE, OKLAHOMA
From 10-MAY-10 18:20:00 to 10-MAY-10 18:20:00 (CST-6)
Location: MAUD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Minor roof damage and downed tree limbs were also reported at this location.

Thunderstorm Wind in PONTOTOC, OKLAHOMA
From 10-MAY-10 18:25:00 to 10-MAY-10 18:25:00 (CST-6)
Location: ADA
Magnitude: 65.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in PONTOTOC, OKLAHOMA
From 10-MAY-10 18:32:00 to 10-MAY-10 18:32:00 (CST-6)
Location: ADA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in MURRAY, OKLAHOMA
From 10-MAY-10 18:50:00 to 10-MAY-10 18:50:00 (CST-6)
Location: TURNER FALLS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The hail was reported along Highway 77.

Hail in PONTOTOC, OKLAHOMA
From 10-MAY-10 19:15:00 to 10-MAY-10 19:15:00 (CST-6)
Location: FITTSTOWN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in LOVE, OKLAHOMA
From 10-MAY-10 19:57:00 to 10-MAY-10 19:57:00 (CST-6)
Location: MARIETTA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: COOP Observer

Thunderstorm Wind in BRYAN, OKLAHOMA
From 10-MAY-10 20:11:00 to 10-MAY-10 20:11:00 (CST-6)
Location: COLBERT
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

No damage was reported with the wind gust.

Hail in PAYNE, OKLAHOMA
From 10-MAY-10 16:29:00 to 10-MAY-10 16:29:00 (CST-6)
Location: (SWO)STILLWATER AIRPORT
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Tornado in CARTER, OKLAHOMA
From 10-MAY-10 17:25:00 to 10-MAY-10 17:26:00 (CST-6)
Location: LONE GROVE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado #E4. A tornado was observed and videotaped just outside the Ardmore city limits. The time and location of this tornado were estimated.

Tornado in STEPHENS, OKLAHOMA
From 10-MAY-10 16:20:00 to 10-MAY-10 16:22:00 (CST-6)
Location: BRAY
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The anticyclonic tornado moved from northeast Stephens County into southeast Grady County. Damage was reported to fences, trees, and around 20 power poles, and several structures were damaged. Minor damage to mobile homes was also reported. Monetary damages were estimated. This tornado is labeled #G1.

Hail in WOODS, OKLAHOMA
From 10-MAY-10 13:45:00 to 10-MAY-10 13:45:00 (CST-6)
Location: ALVA
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The hail was reported on the northwest side of town.

Hail in ALFALFA, OKLAHOMA
From 10-MAY-10 14:03:00 to 10-MAY-10 14:03:00 (CST-6)
Location: LAMBERT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALFALFA, OKLAHOMA
From 10-MAY-10 14:10:00 to 10-MAY-10 14:10:00 (CST-6)
Location: CHEROKEE
Magnitude: 4.25 
Crop damage: 0.00K
Reported by: Storm Chaser

The hail broke numerous winds at several businesses. The report was relayed by NWS Tulsa.

Hail in GARFIELD, OKLAHOMA
From 10-MAY-10 14:57:00 to 10-MAY-10 15:00:00 (CST-6)
Location: WAUKOMIS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in GRANT, OKLAHOMA
From 10-MAY-10 15:00:00 to 10-MAY-10 15:00:00 (CST-6)
Location: RENFROW
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in GARFIELD, OKLAHOMA
From 10-MAY-10 15:02:00 to 10-MAY-10 15:02:00 (CST-6)
Location: (END)VANCE AFB ENID
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in GARFIELD, OKLAHOMA
From 10-MAY-10 15:08:00 to 10-MAY-10 15:08:00 (CST-6)
Location: WAUKOMIS
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in GARFIELD, OKLAHOMA
From 10-MAY-10 15:10:00 to 10-MAY-10 15:10:00 (CST-6)
Location: FAIRMONT
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in NOBLE, OKLAHOMA
From 10-MAY-10 15:15:00 to 10-MAY-10 15:15:00 (CST-6)
Location: BILLINGS
Magnitude: 4.75 
Crop damage: 0.00K
Reported by: Trained Spotter

The hail dented the siding and broke the windows of several cars. Monetary damage estimates were not available.

Hail in GARFIELD, OKLAHOMA
From 10-MAY-10 15:17:00 to 10-MAY-10 15:25:00 (CST-6)
Location: GARBER
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in OKLAHOMA, OKLAHOMA
From 10-MAY-10 16:15:00 to 10-MAY-10 16:15:00 (CST-6)
Location: DEL CITY
Magnitude: 4.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CLEVELAND, OKLAHOMA
From 10-MAY-10 16:16:00 to 10-MAY-10 16:16:00 (CST-6)
Location: MOORE
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 10-MAY-10 16:20:00 to 10-MAY-10 16:20:00 (CST-6)
Location: (OUN)NORMAN WESTHEIMER ARPT
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in CLEVELAND, OKLAHOMA
From 10-MAY-10 16:23:00 to 10-MAY-10 16:23:00 (CST-6)
Location: MOORE
Magnitude: 2.13 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in CLEVELAND, OKLAHOMA
From 10-MAY-10 16:25:00 to 10-MAY-10 16:25:00 (CST-6)
Location: MOORE
Magnitude: 4.60 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Photographic evidence showed numerous hail stones at least softball size, with one picture showing a measured stone of 4.6. Other hail stones were reportedly up to 5 in diameter. Some of the hail either embedded in roof tops, or punctured their way through. Significant damage to automobiles was also reported throughout the town of Moore.

Hail in CLEVELAND, OKLAHOMA
From 10-MAY-10 16:30:00 to 10-MAY-10 16:30:00 (CST-6)
Location: MOORE
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tree damage was also reported with the hail.

Hail in OKLAHOMA, OKLAHOMA
From 10-MAY-10 16:30:00 to 10-MAY-10 16:30:00 (CST-6)
Location: CHOCTAW
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in CLEVELAND, OKLAHOMA
From 10-MAY-10 16:39:00 to 10-MAY-10 16:50:00 (CST-6)
Location: SLAUGHTERVILLE
Tornado F-scale: EF2
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Cleveland County portion of tornado #J3. The tornado developed west of SE 120th Avenue between Maguire Road and Cemetary Road.  The tornado moved through a mobile home park northeast of SE 120th Avenue and Maguire Road causing significant damage to a number of the mobile homes and injuring 2 people.  The tornado continue to cause tree damage as it moved northeast, then heavily damaged the Country Boy IGA grocery store and service station on State Highway 9 to the east of Lake Thunderbird.  The tornado began to move east-northeast and moved into Pottawatomie County along State Highway 9 about one minute before tornado #J1 also crossed into Pottawatomie County at about the same location.

Tornado in POTTAWATOMIE, OKLAHOMA
From 10-MAY-10 16:50:00 to 10-MAY-10 16:59:00 (CST-6)
Location: PINK
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Pottawatomie County portion of Tornado #J3.  The tornado moved into Pottawatomie County from Cleveland County and was generally about one mile northeast of tornado #J1 in Pottawatomie County.  This tornado continued north of State Highway 9 causing tree and roof damage on the west side of State Highway 102 before dissipating.

Tornado in POTTAWATOMIE, OKLAHOMA
From 10-MAY-10 16:56:00 to 10-MAY-10 17:11:00 (CST-6)
Location: TECUMSEH
Tornado F-scale: EF3
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado lasted for at least 30 miles and continued into Seminole and Okfuskee counties, with significant damage along almost its entire path. At times, the tornado damage path widened up to a mile. The most significant damage was located north and northeast of Earlsboro near the Pottawatomie/Seminole county border. Here a two story home was destroyed except for a few interior walls. A pick-up truck was also lofted approximately a quarter of a mile, and a semi-trailer was lofted or rolled approximately 200 yards. Farther east along its path, seven high tension towers were downed. Significant tree damage was reported along the entire track of the tornado, some of them debarked and stripped off all their branches. This tornado is labeled #J4.
This tornado moved into Seminole County.

Tornado in LOVE, OKLAHOMA
From 10-MAY-10 17:54:00 to 10-MAY-10 17:56:00 (CST-6)
Location: MARIETTA
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Lots of trees were damaged along the tornadoes path. At beginning of the path, a local store sustained EF1 damage. Other minor damage to structures was reported along its track. This tornado is labeled #K1. Monetary damages were estimated.

Tornado in MARSHALL, OKLAHOMA
From 10-MAY-10 18:08:00 to 10-MAY-10 18:09:00 (CST-6)
Location: LEBANON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado #K2.  This tornado was observed by spotters near Lebanon.  No damage was reported and the location is estimated.

Tornado in MARSHALL, OKLAHOMA
From 10-MAY-10 18:15:00 to 10-MAY-10 18:16:00 (CST-6)
Location: WILLIS
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado #K3.  A second tornado was observed by spotters near Lebanon.  No damage was reported and the location is estimated.

Tornado in POTTAWATOMIE, OKLAHOMA
From 10-MAY-10 16:48:00 to 10-MAY-10 17:02:00 (CST-6)
Location: DALE
Tornado F-scale: EF3
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado is labeled #L1. The tornado developed near the junction of Walker and Ingram Roads, causing major damage to home and damaging several trees. The tornado crossed to the east side of the lake, downing high tension power lines and another residence. The tornado grew to its widest near Highway 102. Another home, a mobile home, and barn were severely damaged just east of the highway. Metal poles that were embedded in concrete at the barn were ripped out of the ground with the concrete still attached. A 80,000 pound box car was rolled about 300 yards. A few trees that were damaged were debarked. The tornado lifted south of Interstate 40.

Tornado in CLEVELAND, OKLAHOMA
From 10-MAY-10 17:52:00 to 10-MAY-10 17:54:00 (CST-6)
Location: LEXINGTON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Tornado #M1.  This tornado moved east in eastern Cleveland County just north of State Highway 39 damaging trees. No structural damage was reported.

Tornado in JOHNSTON, OKLAHOMA
From 10-MAY-10 19:05:00 to 10-MAY-10 19:09:00 (CST-6)
Location: MILL CREEK
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Tornado #N1. Johnston County Emergency Management reported a tornado southwest and south of Mill Creek.  No damage was reported and the location is estimated.

Tornado in SEMINOLE, OKLAHOMA
From 10-MAY-10 17:11:00 to 10-MAY-10 17:35:00 (CST-6)
Location: SEMINOLE
Tornado F-scale: EF3
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado continued from Pottawatomie county, moved through Seminole county and continued into Okfuskee County just east of Cromwell. This tornado lasted at least 30 miles, with significant damage along its entire path. At times, the tornado damage path widened up to a mile. The most significant damage was located north and northeast of Earlsboro near the Pottawatomie/Seminole county border. Here a two story home was destroyed except for a few interior walls. A pick-up truck was also lofted approximately a quarter of a mile, and a semi-trailer was lofted or rolled approximately 200 yards. Farther east along its path, seven high tension towers were downed. Several hangers were destroyed at the Seminole Municipal Airport north of Seminole, and one small aircraft was flipped onto one of the destroyed hangers. Two mobile homes were destroyed near the airport and one resident suffered a broken arm. Significant tree damage was reported along the entire track of the tornado, some of them debarked and stripped off all their branches. See the documentation by the NWS Tulsa office for information of this tornado in Okfuskee County. This tornado is labeled #J4.

Tornado in JOHNSTON, OKLAHOMA
From 10-MAY-10 19:42:00 to 10-MAY-10 19:45:00 (CST-6)
Location: COLEMAN
Tornado F-scale: EF2
Property damage: 2.63M
Crop damage: 0.00K
Reported by: Emergency Manager

This tornado is labeled #N2. The tornado developed about a mile south-southeast of Coleman and moved southeast another mile, eventually traveling just into Atoka county. Several buildings, including a home, sustained major damage. Four other homes sustained at least partial damage. The U Cross Arena and Pavilion was heavily damaged, with part of the roof moved removed, steal beams on the outside of the building knocked down, and a section of the building completely destroyed. The tornado continued across the Atoka county border.
This tornado moved into Atoka County.

Tornado in ATOKA, OKLAHOMA
From 10-MAY-10 19:45:00 to 10-MAY-10 19:45:00 (CST-6)
Location: BOGGY DEPOT STATE PARK
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Atoka County portion of tornado #N2.  The tornado that created damage near Coleman in Johnson County moved into Atoka County producing light damage.

Tornado in GRANT, OKLAHOMA
From 10-MAY-10 14:33:00 to 10-MAY-10 14:33:00 (CST-6)
Location: NASH
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Tornado #A1. A brief tornado was observed southwest of SH-132 and SH-11 by several storm chasers.  No known damage occurred.

Hail in MCCLAIN, OKLAHOMA
From 10-MAY-10 16:15:00 to 10-MAY-10 16:15:00 (CST-6)
Location: BLANCHARD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in PAYNE, OKLAHOMA
From 10-MAY-10 16:15:00 to 10-MAY-10 16:15:00 (CST-6)
Location: LAKE CARL BLACKWELL DAM
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in OKLAHOMA, OKLAHOMA
From 10-MAY-10 15:00:00 to 10-MAY-10 15:00:00 (CST-6)
Location: WARR ACRES
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in NOBLE, OKLAHOMA
From 10-MAY-10 15:30:00 to 10-MAY-10 15:30:00 (CST-6)
Location: BILLINGS
Magnitude: 2.75 
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CANADIAN, OKLAHOMA
From 10-MAY-10 15:40:00 to 10-MAY-10 15:40:00 (CST-6)
Location: UNION CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GRADY, OKLAHOMA
From 10-MAY-10 15:39:00 to 10-MAY-10 15:39:00 (CST-6)
Location: MINCO
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GRADY, OKLAHOMA
From 10-MAY-10 15:39:00 to 10-MAY-10 15:40:00 (CST-6)
Location: MINCO
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GARFIELD, OKLAHOMA
From 10-MAY-10 15:03:00 to 10-MAY-10 15:03:00 (CST-6)
Location: FAIRMONT
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado in GRADY, OKLAHOMA
From 10-MAY-10 16:22:00 to 10-MAY-10 16:27:00 (CST-6)
Location: COX CITY
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado is labeled #G1.This anticyclonic tornado continued from northeast Stephens County into southeast Grady County. Damage was reported to fences, trees, and around 20 power poles, and several structures were damaged. Minor damage to mobile homes was also reported. Monetary damages were estimated.

Tornado in MCCLAIN, OKLAHOMA
From 10-MAY-10 16:36:00 to 10-MAY-10 16:43:00 (CST-6)
Location: PAYNE
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The anticyclonic tornado occurred over southern McClain county. The most significant damage occurred at the Mid America Technology Center. Some AC units were blown off of the roof and some of the doors were blown in. This tornado is labeled #G2. Monetary damages were estimated.

Tornado in MCCLAIN, OKLAHOMA
From 10-MAY-10 16:37:00 to 10-MAY-10 16:38:00 (CST-6)
Location: PAYNE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This brief tornado produced minor damage to a shed. This tornado is labeled #G3. Monetary damages were estimated.

Hail in GRANT, OKLAHOMA
From 10-MAY-10 14:30:00 to 10-MAY-10 14:45:00 (CST-6)
Location: WAKITA
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in GRANT, OKLAHOMA
From 10-MAY-10 14:25:00 to 10-MAY-10 14:35:00 (CST-6)
Location: MANCHESTER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in KAY, OKLAHOMA
From 10-MAY-10 15:55:00 to 10-MAY-10 15:55:00 (CST-6)
Location: WHITE EAGLE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

The hail was reported approximately 8 miles south of Ponca City.

Hail in STEPHENS, OKLAHOMA
From 10-MAY-10 16:03:00 to 10-MAY-10 16:03:00 (CST-6)
Location: CORUM
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The hail was reported on Highway 53 at Corum Road.

Hail in GRADY, OKLAHOMA
From 10-MAY-10 16:07:00 to 10-MAY-10 16:07:00 (CST-6)
Location: TABLER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in JEFFERSON, OKLAHOMA
From 10-MAY-10 16:05:00 to 10-MAY-10 16:14:00 (CST-6)
Location: HASTINGS
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Tornado #D1. A tornado developed within the town of Hastings and moved northeast, seriously damaging a home.  The tornado continued northeast over Waurika Lake and dissipated near the east shore of the lake.

Tornado in JEFFERSON, OKLAHOMA
From 10-MAY-10 16:44:00 to 10-MAY-10 16:46:00 (CST-6)
Location: CORNISH
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Tornado #E1. A tornado was observed moving through pastureland to the west-southwest of Cornish. No damage was reported.

Thunderstorm Wind in NOBLE, OKLAHOMA
From 10-MAY-10 16:03:00 to 10-MAY-10 16:03:00 (CST-6)
Location: RED ROCK
Magnitude: 70.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

A barn was destroyed.

Thunderstorm Wind in POTTAWATOMIE, OKLAHOMA
From 10-MAY-10 18:01:00 to 10-MAY-10 18:01:00 (CST-6)
Location: WANETTE
Magnitude: 60.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Roof damage was reported to a business just north of Wanette near the intersection of State Highway 39 and State Highway 102.

Tornado in KAY, OKLAHOMA
From 10-MAY-10 15:19:00 to 10-MAY-10 15:30:00 (CST-6)
Location: BRAMAN
Tornado F-scale: EF3
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This is the Kay County portion of tornado #A2.  The tornado crossed into Kay County from Grant County and continued to produce significant damage.  One home was destroyed and another significantly damaged between the Grant County line and U.S. Highway 177.  After the tornado crossed US-177, an anchored mobile home was destroyed and blown to the east, and a tri-level home was destroyed with the top floor blown about 50 yards northeast into some trees, and the ground floor pivoted and was displaced to the northwest exposing the basement where one minor injury occurred.  The tornado continued to produce significant tree damage as it moved east-northeast, and blew semi trucks over along Interstate 35 at the Kansas state line.  This tornado crossed into Sumner County Kansas.  See documentation from the NWS Wichita KS for additional information.

Tornado in GRANT, OKLAHOMA
From 10-MAY-10 14:38:00 to 10-MAY-10 15:19:00 (CST-6)
Location: WAKITA
Tornado F-scale: EF3
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This is the Grant County portion of tornado #A2. This tornado developed as a multiple-vortex tornado along State Highway 11 southwest of Wakita.  The tornado initially moved east and southeast continuing to affect State Highway 11 before beginning an east-northeast movement across Grant County.  The tornado was a large and occasionally multiple-vortex tornado as it moved northwest and north of Medford and was embedded within a larger scale circulation that was strong enough to produce damage along a wide area around the tornado path.  The tornado caused significant structural damage about 5 miles northwest of Medford and 5 miles east of Renfrow, and many areas of tree and power pole damage. This tornado moved into Kay County.

Tornado in KINGFISHER, OKLAHOMA
From 10-MAY-10 15:46:00 to 10-MAY-10 15:54:00 (CST-6)
Location: CASHION
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Kingfisher County portion of Tornado #H1. This tornado moved into Kingfisher County from Canadian County and moved northeast damaging outbuildings, trees and power lines across the southeastern portion of Kingfisher County. The tornado moved into Logan County just southeast of Cashion.

Tornado in LOGAN, OKLAHOMA
From 10-MAY-10 15:54:00 to 10-MAY-10 15:54:00 (CST-6)
Location: NAVINA
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Logan County portion of tornado #H1.  The tornado moved into Logan County from Kingfisher County just southeast of Cashion.  The tornado moved northeast another half of a mile damaging tree limbs and an antenna.

Tornado in CLEVELAND, OKLAHOMA
From 10-MAY-10 16:20:00 to 10-MAY-10 16:35:00 (CST-6)
Location: (OUN)NORMAN WESTHEIMER ARPT
Tornado F-scale: EF3
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado is labeled I1. This long-tracked and devastating tornado developed west of I-35, northwest of Max Westheimer airport. Widespread tree, power line/pole damage was reported from near I-35 to the east side of Stanley Draper Lake. Several homes also sustained damage, mainly with mostly roofs receiving significant damage, and some siding was ripped off. Several fences were also knocked down as the tornado moved northeast. From the east side of Lake Stanley Draper, near Hiwassee Road and SE 89th Street, to just south of Harrah, the damage path became more severe and focused. The tree damage became more severe, breaking at various heights of the tree or being uprooted. Walls of homes collapsed, and debris from the homes scattered in all directions. Several 2x4's punctured roofs and ceilings over numerous structures. A few mobile homes in this area were also completely destroyed. Where the tornado crossed I-40, a gas station and drive-in restaurant sustained up to EF3 damage. The most severe damage, one of the two EF4 tornadoes of the day, occurred in the Deerfield West Subdivision. A well-built residence here was completely destroyed, with most exterior and interior walls collapsing. The tornado finally lifted 2 miles south of Harrah. In addition to the incredible damage, one person lost their life while trying to flee the tornado.

Tornado in GRANT, OKLAHOMA
From 10-MAY-10 15:03:00 to 10-MAY-10 15:04:00 (CST-6)
Location: MEDFORD
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Tornado #A3.  A brief tornado was observed southwest of the main tornado moving through Grant County. No damage was reported and the location is estimated.

Tornado in GRANT, OKLAHOMA
From 10-MAY-10 15:15:00 to 10-MAY-10 15:22:00 (CST-6)
Location: RENFROW
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This is the Grant County portion of tornado #A4.  A tornado developed and moved east-northeast a few minutes behind Tornado #A2 along a nearly parallel path to the south.  This tornado produced significant tree damage and snapped power poles in Grant County before moving into Kay County.

Tornado in KAY, OKLAHOMA
From 10-MAY-10 15:22:00 to 10-MAY-10 15:23:00 (CST-6)
Location: BRAMAN
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Kay County portion of tornado #A4.  This tornado moved into Kay County from Grant County and continued to produce tree damage before dissipating about one mile inside Kay County.

Tornado in KAY, OKLAHOMA
From 10-MAY-10 15:17:00 to 10-MAY-10 15:26:00 (CST-6)
Location: BRAMAN
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Tornado #A5. Another tornado developed and moved a few minutes ahead of tornado #A2 and a couple of miles to the south.  The tornado caused significant tree damage along the entire path.  Just west of Interstate 35, a house suffered significant roof damage, although it was somewhat protected by a number of large trees just west of the house.  Two semi trucks was blown over as this tornado crossed Interstate 35 two miles south of the Kansas state line.

Tornado in KAY, OKLAHOMA
From 10-MAY-10 15:21:00 to 10-MAY-10 15:22:00 (CST-6)
Location: NARDIN
Tornado F-scale: EF0
Crop damage: 0.00K
Reported by: NWS Storm Survey

Tornado #A6. An anticyclonic tornado snapped a power pole and damaged trees as it moved east-northeast.

Tornado in GRANT, OKLAHOMA
From 10-MAY-10 14:39:00 to 10-MAY-10 14:39:00 (CST-6)
Location: WAKITA
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

While the large multiple-vortex tornado (see entry for tornado A2 in Grant County) was developing southwest of Wakita, a storm chaser documented a satellite tornado that formed to the southeast of the primary tornado and moved northeast. This tornado persisted for about 30 seconds. No known damage occurred. Note: Although this tornado is the third tornado produced by supercell A, this tornado will be labeled as tornado A7 due to the late addition of this report and to preserve the continuity of labels of the other tornadoes produced by this supercell.

Tornado in CLEVELAND, OKLAHOMA
From 10-MAY-10 16:22:00 to 10-MAY-10 16:27:00 (CST-6)
Location: MOORE
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Tornado #I2. Power poles and a house were damaged near and just east of Broadway Street and Eastern Avenue in the southern portion of Moore.  As the tornado moved northeast, most of the roof was removed from a mobile home and trees were damaged west of Sunnylane Road north of NE 12th Street, and shingle damage occurred on a house just east of Sunnylane Road.

Tornado in CLEVELAND, OKLAHOMA
From 10-MAY-10 16:27:00 to 10-MAY-10 16:27:00 (CST-6)
Location: STANLEY DRAPER LAKE DAM
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Tornado #I3. Roof damage occurred at a restaurant near SE 34th Street and Sooner Road in southeast Moore.  The tornado moved east-northeast across Sooner Road into a neighborhood, producing tree and roof damage before dissipating.

Tornado in CLEVELAND, OKLAHOMA
From 10-MAY-10 16:32:00 to 10-MAY-10 16:51:00 (CST-6)
Location: NORMAN
Tornado F-scale: EF4
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado is labeled #J1, and moved into Pottawatomie County near state highway 9. The tornado a few hundred yards east of the National Weather Center in Norman, Oklahoma. The damage intensity increased gradually along the path with significant damage beginning as the tornado approached Lake Thunderbird. This tornado crossed Lake Thunderbird, severely damaging two campgrounds and the marina where about 300 boats were docked.  The most severe damage occurred from the Little Axe School to the Cleveland/Pottawatomie county line. Trees were stripped of some bark and branches. Large objects were thrown considerable distances, including some concrete pillars. The metal bleachers near the school were tossed or rolled several hundred yards. Some appliances were also lofted as a dryer was found about 50 feet up in a tree. Considerable structural damage also occurred, as some foundation homes were mostly destroyed.  In addition to the damage, one person lost their life as a result of the tornado.

Tornado in POTTAWATOMIE, OKLAHOMA
From 10-MAY-10 16:51:00 to 10-MAY-10 16:59:00 (CST-6)
Location: PINK
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Pottawatomie County portion of tornado #J1.  This tornado crossed into Pottawatomie County from Cleveland County near State Highway 9.  The tornado crossed the path of tornado #J3 and remained south of State Highway 9 in Pottawatomie County, causing tree damage along State Highway 102 before dissipating.

Tornado in CLEVELAND, OKLAHOMA
From 10-MAY-10 16:34:00 to 10-MAY-10 16:40:00 (CST-6)
Location: NORMAN
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Tornado #J2. This anticyclonic tornado developed in the southern portion of Norman south of State Highway 9 near Chautauqua Avenue and to the southwest of tornado #J1.  The tornado moved east-northeast causing roof, tree and fence damage to neighborhoods along Cedar Lane, especially after crossing U.S. Highway 77.  The tornado continued to produce tree damage as it moved east and east-northeast.  It crossed State Highway 9 to the east of SE 48th Avenue and moved into a neighborhood to the northwest of SE 60th Avenue and Highway 9 a few minutes after tornado #J1 had caused damage in this same neighborhood.  The tornado dissipated near SE 60th Avenue.

Tornado in OKLAHOMA, OKLAHOMA
From 10-MAY-10 16:35:00 to 10-MAY-10 16:51:00 (CST-6)
Location: (TIK)TINKER AFB
Tornado F-scale: EF4
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado is a continuation of the tornado that began in Cleveland County, labeled  #I1. This long-tracked and devastating tornado developed west of I-35, northwest of Max Westheimer airport. Widespread tree, power line/pole damage was reported from near I-35 to the east side of Stanley Draper Lake. Several homes also sustained damage, mainly with mostly roofs receiving significant damage, and some siding was ripped off. Several fences were also knocked down as the tornado moved northeast. From the east side of Lake Stanley Draper, near Hiwassee Road and SE 89th Street, to just south of Harrah, the damage path became more severe and focused. The tree damage became more severe, breaking at various heights of the tree or being uprooted. Walls of homes collapsed, and debris from the homes scattered in all directions. Several 2x4's punctured roofs and ceilings over numerous structures. A few mobile homes in this area were also completely destroyed. Where the tornado crossed I-40, a gas station and drive-in restaurant sustained up to EF3 damage. The most severe damage, one of the two EF4 tornadoes of the day, occurred in the Deerfield West Subdivision. A well-built residence here was completely destroyed, with most exterior and interior walls collapsing. The tornado finally lifted 2 miles south of Harrah. In addition to the incredible damage, two people lost their lives as a result of the tornado.

Tornado in NOBLE, OKLAHOMA
From 10-MAY-10 15:53:00 to 10-MAY-10 15:54:00 (CST-6)
Location: RED ROCK
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Tornado #B1.  Storm chasers reported a brief tornado north-northeast of Red Rock. No damage was reported and the location is estimated.

Tornado in NOBLE, OKLAHOMA
From 10-MAY-10 16:00:00 to 10-MAY-10 16:12:00 (CST-6)
Location: MARLAND
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Tornado #B2. Storm chasers observed this tornado developing east of US-177.  It quickly became rain-wrapped and moved across rural northeastern Noble County.  A house was damaged 12.5 miles east of Marland just before the tornado crossed the Arkansas River into Osage County.  See documentation from the NWS Tulsa OK for information about the tornado in Osage County.

Tornado in NOBLE, OKLAHOMA
From 10-MAY-10 16:02:00 to 10-MAY-10 16:03:00 (CST-6)
Location: MARLAND
Tornado F-scale: EF1
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Tornado #B3. Storm chasers observed this anticyclonic tornado.  Roof damage was reported a mile west of US-177, and some damage occurred at a casino as the tornado crossed US-177.

Tornado in OKLAHOMA, OKLAHOMA
From 10-MAY-10 16:13:00 to 10-MAY-10 16:13:00 (CST-6)
Location: THE VILLAGE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tornado #C2. An Oklahoma City police officer observed a tornado touch down briefly near Memorial Road and Pennsylvania Avenue.  No damage was reported.

Tornado in STEPHENS, OKLAHOMA
From 10-MAY-10 16:50:00 to 10-MAY-10 16:54:00 (CST-6)
Location: LOCO
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado #D2. A tornado was observed and photographed by storm spotters to the east of Loco which damaged a barn and a few trees. The path of the tornado is estimated.

Tornado in CARTER, OKLAHOMA
From 10-MAY-10 17:04:00 to 10-MAY-10 17:10:00 (CST-6)
Location: HEALDTON
Tornado F-scale: EF2
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Tornado #E2. Mobile homes were destroyed and seriously damaged and significant tree damage occurred as a tornado moved from 4 miles south-southwest of Healdton to 2 miles north-northwest of Wilson.

Tornado in CARTER, OKLAHOMA
From 10-MAY-10 17:22:00 to 10-MAY-10 17:34:00 (CST-6)
Location: LONE GROVE
Tornado F-scale: EF3
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

At least 4 mobile homes and 1 foundation home were destroyed by a large tornado. Other homes and outbuildings sustained minor to moderate damage. Widespread tree and power line damage was also noted along its track, and some high tension lines were downed. This tornado is labeled #E3. Monetary damages were estimated.

Tornado in CANADIAN, OKLAHOMA
From 10-MAY-10 15:46:00 to 10-MAY-10 15:46:00 (CST-6)
Location: PIEDMONT
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Canadian County portion of tornado #H1. An outbuilding was significantly damaged just south of the Kingfisher County line and east of Piedmont Road.  The storm then moved into Kingfisher County.

Hail in STEPHENS, OKLAHOMA
From 10-MAY-10 16:06:00 to 10-MAY-10 16:06:00 (CST-6)
Location: COMANCHE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Tornado in CANADIAN, OKLAHOMA
From 10-MAY-10 15:46:00 to 10-MAY-10 15:52:00 (CST-6)
Location: UNION CITY
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Tornado #C1. A tornado was observed and photographed by broadcast media and numerous citizens southwest of Yukon.  No damage was reported and the path was estimated.