Several supercell thunderstorms with large hail and tornadoes affected much of western Oklahoma during the late afternoon and early evening. The storms evolved into a squall line that brought numerous reports of severe weather, including particularly damaging winds and hail. A few locations that had received damage from the May 10 tornadoes saw additional damage.

Thunderstorm Wind in STEPHENS, OKLAHOMA
From 13-MAY-10 02:20:00 to 13-MAY-10 02:20:00 (CST-6)
Location: VELMA
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in STEPHENS, OKLAHOMA
From 13-MAY-10 02:25:00 to 13-MAY-10 02:25:00 (CST-6)
Location: VELMA
Magnitude: 54.00 MG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A couple of power poles were blown down. Monetary damages were estimated.

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 13-MAY-10 02:30:00 to 13-MAY-10 02:30:00 (CST-6)
Location: (OUN)NORMAN WESTHEIMER ARPT
Magnitude: 56.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: NWS Employee

Several fence panels were downed, several of which were blown approximately 15 feet. Pea size hail also occurred at this location. Monetary damages were estimated.

Thunderstorm Wind in MCCLAIN, OKLAHOMA
From 13-MAY-10 02:30:00 to 13-MAY-10 02:32:00 (CST-6)
Location: BLANCHARD
Magnitude: 56.00 EG
Crop damage: 0.00K
Reported by: Public

Several tree branches at least 6-inches in diameter, as well as numerous smaller branches, were blown down. Minor roof damage was also report to roof of a home, and a couple of windows were broken on a garage. Monetary damage estimates were not available.

Thunderstorm Wind in POTTAWATOMIE, OKLAHOMA
From 13-MAY-10 03:00:00 to 13-MAY-10 03:00:00 (CST-6)
Location: DALE
Magnitude: 56.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Several power lines and a tree were downed by the strong winds. The report was relayed by KWTV-9. Monetary damages were estimated.

Thunderstorm Wind in GARVIN, OKLAHOMA
From 13-MAY-10 02:25:00 to 13-MAY-10 02:25:00 (CST-6)
Location: LINDSAY
Magnitude: 75.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

A total of 39 businesses were damaged by the severe winds. One business was destroyed, and 10 sustained major damage. Nine mobile homes were also damaged. At the lumber yard, the roofs of two buildings were blown off. Several power lines, tree branches, and two restaurant signs were also downed. The report was relayed by KWTV-9 and local emergency management. Monetary damage estimates were not available.

Hail in GARFIELD, OKLAHOMA
From 12-MAY-10 22:50:00 to 12-MAY-10 22:50:00 (CST-6)
Location: HILLSDALE
Magnitude: 1.75 
Crop damage: 0.00K
Reported by: Emergency Manager

Strong winds were also reported with hail, puncturing holes in the siding of a building. Damage to the area wheat crop was also reported. Monetary damage estimates were not available.

Thunderstorm Wind in GARFIELD, OKLAHOMA
From 12-MAY-10 23:12:00 to 12-MAY-10 23:12:00 (CST-6)
Location: HUNTER
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 KAY, OKLAHOMA
From 12-MAY-10 23:30:00 to 12-MAY-10 23:30:00 (CST-6)
Location: BLACKWELL
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in KAY, OKLAHOMA
From 12-MAY-10 23:30:00 to 12-MAY-10 23:30:00 (CST-6)
Location: BLACKWELL
Magnitude: 1.75 
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A car sustained several dents and the windshield was cracked by the hail. Monetary damages were estimated.

Hail in KAY, OKLAHOMA
From 12-MAY-10 23:52:00 to 12-MAY-10 23:52:00 (CST-6)
Location: CHILOCCO
Magnitude: 2.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in WASHITA, OKLAHOMA
From 12-MAY-10 18:52:00 to 12-MAY-10 18:52:00 (CST-6)
Location: CANUTE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in WASHITA, OKLAHOMA
From 12-MAY-10 18:55:00 to 12-MAY-10 19:05:00 (CST-6)
Location: FOSS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in WASHITA, OKLAHOMA
From 12-MAY-10 19:01:00 to 12-MAY-10 19:01:00 (CST-6)
Location: BURNS FLAT
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in CUSTER, OKLAHOMA
From 12-MAY-10 19:26:00 to 12-MAY-10 19:26:00 (CST-6)
Location: ARAPAHO
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in JACKSON, OKLAHOMA
From 13-MAY-10 00:34:00 to 13-MAY-10 00:34:00 (CST-6)
Location: (LTS)ALTUS AFB
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Hail in BECKHAM, OKLAHOMA
From 12-MAY-10 18:25:00 to 12-MAY-10 18:25:00 (CST-6)
Location: CARTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Hail in BECKHAM, OKLAHOMA
From 12-MAY-10 18:25:00 to 12-MAY-10 18:25:00 (CST-6)
Location: CARTER
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BECKHAM, OKLAHOMA
From 12-MAY-10 18:30:00 to 12-MAY-10 18:30:00 (CST-6)
Location: ELK CITY
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in BECKHAM, OKLAHOMA
From 12-MAY-10 18:35:00 to 12-MAY-10 18:35:00 (CST-6)
Location: ELK CITY
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in BECKHAM, OKLAHOMA
From 12-MAY-10 18:40:00 to 12-MAY-10 18:49:00 (CST-6)
Location: ELK CITY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in WASHITA, OKLAHOMA
From 12-MAY-10 18:45:00 to 12-MAY-10 18:55:00 (CST-6)
Location: CANUTE
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail up to tennis ball size fell for 10 minutes. Wind gusts to 50 mph were also reported at this location.

Hail in ROGER MILLS, OKLAHOMA
From 12-MAY-10 20:30:00 to 12-MAY-10 20:30:00 (CST-6)
Location: CRAWFORD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The hail was reported on the county line between Ellis and Roger Mills counties.

Thunderstorm Wind in GARFIELD, OKLAHOMA
From 12-MAY-10 22:45:00 to 12-MAY-10 22:45:00 (CST-6)
Location: ENID
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Several large tree limbs were downed, and a roof sustained minor roof damage. Monetary damages were estimated.

Hail in WOODWARD, OKLAHOMA
From 12-MAY-10 16:20:00 to 12-MAY-10 16:20:00 (CST-6)
Location: TANGIER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in BECKHAM, OKLAHOMA
From 12-MAY-10 17:00:00 to 12-MAY-10 17:00:00 (CST-6)
Location: SWEETWATER
Magnitude: 1.75 
Property damage: 0.20K
Crop damage: 0.00K
Reported by: Emergency Manager

The hail was reported between Mayfield and Sweetwater. Tree limbs were also downed at this location. Monetary damages were estimated.

Hail in ELLIS, OKLAHOMA
From 12-MAY-10 17:08:00 to 12-MAY-10 17:08:00 (CST-6)
Location: GAGE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ROGER MILLS, OKLAHOMA
From 12-MAY-10 17:20:00 to 12-MAY-10 17:20:00 (CST-6)
Location: DEMPSEY
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BECKHAM, OKLAHOMA
From 12-MAY-10 17:51:00 to 12-MAY-10 17:51:00 (CST-6)
Location: ERICK
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BECKHAM, OKLAHOMA
From 12-MAY-10 18:08:00 to 12-MAY-10 18:08:00 (CST-6)
Location: SAYRE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in MCCLAIN, OKLAHOMA
From 13-MAY-10 02:38:00 to 13-MAY-10 02:40:00 (CST-6)
Location: NEWCASTLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JACKSON, OKLAHOMA
From 13-MAY-10 01:04:00 to 13-MAY-10 01:04:00 (CST-6)
Location: ALTUS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in WOODWARD, OKLAHOMA
From 12-MAY-10 14:45:00 to 12-MAY-10 14:50:00 (CST-6)
Location: MOORELAND
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Most of the hail was smaller, but a few hail stones were 1.00 inch.

Hail in JACKSON, OKLAHOMA
From 12-MAY-10 15:45:00 to 12-MAY-10 15:45:00 (CST-6)
Location: BLAIR
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in JACKSON, OKLAHOMA
From 13-MAY-10 00:35:00 to 13-MAY-10 00:35:00 (CST-6)
Location: ALTUS
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Minor roof damage was reported was reported to homes. Numerous tree limbs up to 8-inches in diameter were also downed by the strong winds. Monetary damage estimates were not available.

Thunderstorm Wind in STEPHENS, OKLAHOMA
From 13-MAY-10 01:50:00 to 13-MAY-10 01:50:00 (CST-6)
Location: EMPIRE CITY
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Broadcast Media

A metal barn was blown down. Numerous tree limbs were also downed. The report was relayed by KWTV-9 TV. Monetary damage estimates were not available.

Thunderstorm Wind in COMANCHE, OKLAHOMA
From 13-MAY-10 01:53:00 to 13-MAY-10 01:53:00 (CST-6)
Location: LAWTON
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Several tree limbs were downed on the west side of Lawton. Monetary damages were estimated.

Hail in COMANCHE, OKLAHOMA
From 13-MAY-10 02:03:00 to 13-MAY-10 02:03:00 (CST-6)
Location: ELGIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thunderstorm Wind in GRADY, OKLAHOMA
From 13-MAY-10 02:15:00 to 13-MAY-10 02:15:00 (CST-6)
Location: NORGE
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in JACKSON, OKLAHOMA
From 12-MAY-10 15:33:00 to 12-MAY-10 15:33:00 (CST-6)
Location: ALTUS
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in HARMON, OKLAHOMA
From 12-MAY-10 17:50:00 to 12-MAY-10 17:50:00 (CST-6)
Location: MADGE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail at least golf ball-size was found along Highway 30 in northern Harmon county. The hail could have been larger than golf ball-size because the hail had been on the ground approximately 40 minutes.

Tornado in WASHITA, OKLAHOMA
From 12-MAY-10 19:21:00 to 12-MAY-10 19:26:00 (CST-6)
Location: BESSIE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Spotters and emergency management personnel observed a tornado that developed over north-central Washita county and moved northeast into Custer county. No damage was reported in Washita county.

Thunderstorm Wind in WASHITA, OKLAHOMA
From 12-MAY-10 18:59:00 to 12-MAY-10 18:59:00 (CST-6)
Location: BURNS FLAT
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

The winds were sustained at 41 kts with gusts to 52 kts. Based on radar the winds were likely associated with the rear flank downdraft.

Hail in ELLIS, OKLAHOMA
From 12-MAY-10 16:08:00 to 12-MAY-10 16:08:00 (CST-6)
Location: FARGO
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in LINCOLN, OKLAHOMA
From 13-MAY-10 03:15:00 to 13-MAY-10 03:15:00 (CST-6)
Location: PRAGUE
Magnitude: 56.00 EG
Crop damage: 0.00K
Reported by: Public

A large pole barn was demolished. Several trees were also uprooted. A portable basketball goal was moved approximately 500 feet. Monetary damage estimates were not available.

Thunderstorm Wind in LINCOLN, OKLAHOMA
From 13-MAY-10 03:15:00 to 13-MAY-10 03:15:00 (CST-6)
Location: PRAGUE
Magnitude: 61.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

Three homes had their roofs completely removed. Three well built barns were also completely destroyed. Monetary damage estimates were not available.

Thunderstorm Wind in SEMINOLE, OKLAHOMA
From 13-MAY-10 03:18:00 to 13-MAY-10 03:18:00 (CST-6)
Location: LITTLE
Magnitude: 56.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

A couple of highway signs were blown down. Several power poles were also broken. Monetary damage estimates were not available.

Thunderstorm Wind in PONTOTOC, OKLAHOMA
From 13-MAY-10 03:32:00 to 13-MAY-10 03:32:00 (CST-6)
Location: VANOSS
Magnitude: 61.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A roof at a residence was partially removed. A 30 ft by 80 ft metal/wood barn was also destroyed. Monetary damages were estimated.

Tornado in CUSTER, OKLAHOMA
From 12-MAY-10 19:26:00 to 12-MAY-10 19:35:00 (CST-6)
Location: CLINTON
Tornado F-scale: EF1
Crop damage: 0.00K
Reported by: Emergency Manager

Storm spotters observed a tornado that moved from Washita county into Custer county.  The tornado damaged a barn and a residence, and downed a few power lines as it moved northeast across Interstate 40 east of Clinton. The tornado lifted north of Intestate 40 near Custer City Road. Monetary damages were not available.

Thunderstorm Wind in GRADY, OKLAHOMA
From 13-MAY-10 02:10:00 to 13-MAY-10 02:10:00 (CST-6)
Location: RUSH SPRINGS
Magnitude: 65.00 EG
Crop damage: 0.00K
Reported by: Emergency Manager

A roof of an apartment complex sustained major damage. Other roof damage was reported to a couple of homes. Monetary damage estimates were not available.

Thunderstorm Wind in GRADY, OKLAHOMA
From 13-MAY-10 02:15:00 to 13-MAY-10 02:15:00 (CST-6)
Location: NINNEKAH
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Tornado in HARMON, OKLAHOMA
From 12-MAY-10 17:20:00 to 12-MAY-10 17:25:00 (CST-6)
Location: VINSON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

The tornado was reported by an off-duty NWS employee. No damage was reported with the tornado and the location is estimated.