A dryline was located from western Kansas through the Texas Panhandle during the afternoon, with a moist, unstable airmass in place over Oklahoma as a shortwave trough approached. Numerous thunderstorms developed during the mid- to late-afternoon hours over much of western and central Oklahoma, with some displaying supercell characteristics at times. Widespread large hail was reported, some significant, along with isolated damaging winds.

Hail in ROGER MILLS, OKLAHOMA
From 08-MAY-13 14:30:00 to 08-MAY-13 14:30:00 (CST-6)
Location: HAMMON
Magnitude: 1.00 
Reported by: Storm Chaser

Hail in DEWEY, OKLAHOMA
From 08-MAY-13 15:20:00 to 08-MAY-13 15:20:00 (CST-6)
Location: LEEDEY
Magnitude: 2.00 
Reported by: Trained Spotter

Spotters reported 2 hail at this time, as well as 1.5 hail 8 minutes earlier.

Hail in CANADIAN, OKLAHOMA
From 08-MAY-13 16:02:00 to 08-MAY-13 16:02:00 (CST-6)
Location: CALUMET
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in CANADIAN, OKLAHOMA
From 08-MAY-13 16:06:00 to 08-MAY-13 16:06:00 (CST-6)
Location: OKARCHE
Magnitude: 1.25 
Reported by: Trained Spotter

Hail in CUSTER, OKLAHOMA
From 08-MAY-13 16:08:00 to 08-MAY-13 16:08:00 (CST-6)
Location: THOMAS
Magnitude: 2.00 
Reported by: Trained Spotter

Hail in CUSTER, OKLAHOMA
From 08-MAY-13 16:35:00 to 08-MAY-13 16:35:00 (CST-6)
Location: THOMAS
Magnitude: 2.00 
Reported by: Storm Chaser

Hail in CANADIAN, OKLAHOMA
From 08-MAY-13 16:37:00 to 08-MAY-13 16:37:00 (CST-6)
Location: CALUMET
Magnitude: 2.00 
Reported by: Storm Chaser

Hail in DEWEY, OKLAHOMA
From 08-MAY-13 16:45:00 to 08-MAY-13 16:45:00 (CST-6)
Location: SEILING
Magnitude: 1.00 
Reported by: Storm Chaser

Hail in DEWEY, OKLAHOMA
From 08-MAY-13 16:55:00 to 08-MAY-13 16:55:00 (CST-6)
Location: SEILING
Magnitude: 2.50 
Reported by: Storm Chaser

Hail in BLAINE, OKLAHOMA
From 08-MAY-13 17:03:00 to 08-MAY-13 17:03:00 (CST-6)
Location: EAGLE CITY
Magnitude: 1.00 
Reported by: Storm Chaser

Hail in CANADIAN, OKLAHOMA
From 08-MAY-13 17:04:00 to 08-MAY-13 17:04:00 (CST-6)
Location: CALUMET
Magnitude: 2.60 
Reported by: Storm Chaser

Hail in MAJOR, OKLAHOMA
From 08-MAY-13 17:06:00 to 08-MAY-13 17:06:00 (CST-6)
Location: CHESTER
Magnitude: 1.75 
Reported by: Storm Chaser

Hail in CANADIAN, OKLAHOMA
From 08-MAY-13 17:10:00 to 08-MAY-13 17:10:00 (CST-6)
Location: EL RENO
Magnitude: 1.50 
Reported by: Storm Chaser

Hail in MAJOR, OKLAHOMA
From 08-MAY-13 17:11:00 to 08-MAY-13 17:11:00 (CST-6)
Location: CHESTER
Magnitude: 2.00 
Reported by: Trained Spotter

Hail in WOODWARD, OKLAHOMA
From 08-MAY-13 17:13:00 to 08-MAY-13 17:13:00 (CST-6)
Location: QUINLAN
Magnitude: 1.50 
Reported by: Trained Spotter

Hail in CANADIAN, OKLAHOMA
From 08-MAY-13 17:31:00 to 08-MAY-13 17:31:00 (CST-6)
Location: EL RENO
Magnitude: 1.75 
Reported by: Trained Spotter

Hail in MAJOR, OKLAHOMA
From 08-MAY-13 17:35:00 to 08-MAY-13 17:35:00 (CST-6)
Location: ORION
Magnitude: 3.00 
Reported by: Trained Spotter

Several reports of tennis ball to tea cup size hail in this area between 5:30-5:40pm LST.

Hail in CADDO, OKLAHOMA
From 08-MAY-13 17:45:00 to 08-MAY-13 17:45:00 (CST-6)
Location: WASHITA
Magnitude: 1.00 
Reported by: Fire Department/Rescue

Hail in CADDO, OKLAHOMA
From 08-MAY-13 17:50:00 to 08-MAY-13 17:50:00 (CST-6)
Location: ANADARKO
Magnitude: 2.00 
Reported by: Public

Hail in CADDO, OKLAHOMA
From 08-MAY-13 17:53:00 to 08-MAY-13 17:53:00 (CST-6)
Location: WASHITA
Magnitude: 1.50 
Reported by: Emergency Manager

Hail in CADDO, OKLAHOMA
From 08-MAY-13 17:55:00 to 08-MAY-13 17:55:00 (CST-6)
Location: FT COBB
Magnitude: 1.75 
Reported by: Amateur Radio

Hail in WOODWARD, OKLAHOMA
From 08-MAY-13 18:03:00 to 08-MAY-13 18:03:00 (CST-6)
Location: MOORELAND
Magnitude: 1.75 
Reported by: Public

Also reported 1 hail 8 minutes earlier.

Hail in CADDO, OKLAHOMA
From 08-MAY-13 18:09:00 to 08-MAY-13 18:09:00 (CST-6)
Location: ANADARKO
Magnitude: 2.00 
Reported by: Emergency Manager

Hail in CADDO, OKLAHOMA
From 08-MAY-13 18:17:00 to 08-MAY-13 18:17:00 (CST-6)
Location: GRACEMONT
Magnitude: 2.75 
Reported by: Emergency Manager

Also reported 1.5 hail 4 minutes earlier.

Hail in CADDO, OKLAHOMA
From 08-MAY-13 18:36:00 to 08-MAY-13 18:36:00 (CST-6)
Location: BINGER
Magnitude: 1.75 
Reported by: Emergency Manager

Thunderstorm Wind in CADDO, OKLAHOMA
From 08-MAY-13 18:50:00 to 08-MAY-13 18:50:00 (CST-6)
Location: ANADARKO
Magnitude: 52.00 EG
Property damage: 10.00K
Reported by: Amateur Radio

Power lines reported down in Anadarko.

Hail in WOODS, OKLAHOMA
From 08-MAY-13 19:10:00 to 08-MAY-13 19:10:00 (CST-6)
Location: WAYNOKA
Magnitude: 1.75 
Reported by: COOP Observer

Hail in WOODWARD, OKLAHOMA
From 08-MAY-13 19:27:00 to 08-MAY-13 19:27:00 (CST-6)
Location: QUINLAN
Magnitude: 1.75 
Reported by: COOP Observer

Thunderstorm Wind in STEPHENS, OKLAHOMA
From 08-MAY-13 19:30:00 to 08-MAY-13 19:30:00 (CST-6)
Location: SUNRAY
Magnitude: 52.00 EG
Property damage: 10.00K
Reported by: Amateur Radio

Power lines reported down along a country road.

Hail in STEPHENS, OKLAHOMA
From 08-MAY-13 19:30:00 to 08-MAY-13 19:30:00 (CST-6)
Location: DUNCAN
Magnitude: 1.00 
Reported by: Public

Hail in WOODS, OKLAHOMA
From 08-MAY-13 19:51:00 to 08-MAY-13 19:51:00 (CST-6)
Location: HOPETON
Magnitude: 1.25 
Reported by: COOP Observer

Hail in CLEVELAND, OKLAHOMA
From 08-MAY-13 20:50:00 to 08-MAY-13 20:50:00 (CST-6)
Location: MOORE
Magnitude: 2.25 
Reported by: Public

Reported half a mile east of 119th and Western. Also numerous reports of 1 hail around Moore between 8:43-8:53pm LST.

Hail in ELLIS, OKLAHOMA
From 08-MAY-13 21:37:00 to 08-MAY-13 21:37:00 (CST-6)
Location: GAGE
Magnitude: 1.00 
Reported by: Public

Hail in OKLAHOMA, OKLAHOMA
From 08-MAY-13 21:45:00 to 08-MAY-13 21:45:00 (CST-6)
Location: EDMOND
Magnitude: 1.00 
Reported by: NWS Employee

Hail in LOGAN, OKLAHOMA
From 08-MAY-13 22:10:00 to 08-MAY-13 22:10:00 (CST-6)
Location: SEWARD
Magnitude: 1.75 
Reported by: Public

Hail in LINCOLN, OKLAHOMA
From 08-MAY-13 22:53:00 to 08-MAY-13 22:53:00 (CST-6)
Location: CHANDLER
Magnitude: 1.00 
Reported by: Emergency Manager

Tornado in GRADY, OKLAHOMA
From 08-MAY-13 19:18:00 to 08-MAY-13 19:18:00 (CST-6)
Location: MINCO
Tornado F-scale: EF0
Reported by: Broadcast Media

Brief tornado reported by KWTV and a Spotter Network storm chaser.