Thunderstorms formed in the vicinity of a cold front and dryline late on the 27th and continued till just after midnight on the 28th.

Hail in JOHNSTON, OKLAHOMA
From 27-MAY-17 19:30:00 to 27-MAY-17 19:30:00 (CST-6)
Location: WAPANUCKA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in ATOKA, OKLAHOMA
From 27-MAY-17 19:49:00 to 27-MAY-17 19:49:00 (CST-6)
Location: BOGGY DEPOT STATE PARK
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in CARTER, OKLAHOMA
From 27-MAY-17 17:47:00 to 27-MAY-17 17:47:00 (CST-6)
Location: LONE GROVE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in CARTER, OKLAHOMA
From 27-MAY-17 17:50:00 to 27-MAY-17 17:50:00 (CST-6)
Location: LONE GROVE
Magnitude: 2.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MURRAY, OKLAHOMA
From 27-MAY-17 17:58:00 to 27-MAY-17 17:58:00 (CST-6)
Location: DAVIS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MURRAY, OKLAHOMA
From 27-MAY-17 18:26:00 to 27-MAY-17 18:26:00 (CST-6)
Location: DAVIS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in CARTER, OKLAHOMA
From 27-MAY-17 18:28:00 to 27-MAY-17 18:28:00 (CST-6)
Location: (ADM)ARDMORE APT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in LINCOLN, OKLAHOMA
From 27-MAY-17 21:35:00 to 27-MAY-17 21:35:00 (CST-6)
Location: PRAGUE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Thunderstorm Wind in PONTOTOC, OKLAHOMA
From 27-MAY-17 21:35:00 to 27-MAY-17 21:35:00 (CST-6)
Location: FITTSTOWN
Magnitude: 61.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in JOHNSTON, OKLAHOMA
From 27-MAY-17 21:47:00 to 27-MAY-17 21:47:00 (CST-6)
Location: TROY
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

No damage reported.

Hail in JOHNSTON, OKLAHOMA
From 27-MAY-17 21:48:00 to 27-MAY-17 21:48:00 (CST-6)
Location: MILL CREEK
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thunderstorm Wind in WOODWARD, OKLAHOMA
From 27-MAY-17 22:00:00 to 27-MAY-17 22:00:00 (CST-6)
Location: MUTUAL
Magnitude: 56.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous windows were blown out.

Thunderstorm Wind in COAL, OKLAHOMA
From 27-MAY-17 22:00:00 to 27-MAY-17 22:00:00 (CST-6)
Location: COALGATE
Magnitude: 56.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Multiple trees and power lines were downed on the south side of Coalgate.

Flash Flood in LINCOLN, OKLAHOMA
From 27-MAY-17 22:02:00 to 28-MAY-17 01:02:00 (CST-6)
Location: MEEKER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flooding was reported along highway 62 between Meeker and Prague causing a significant traffic back up.

Thunderstorm Wind in WOODWARD, OKLAHOMA
From 27-MAY-17 22:15:00 to 27-MAY-17 22:15:00 (CST-6)
Location: MUTUAL
Magnitude: 54.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Tornado in CARTER, OKLAHOMA
From 27-MAY-17 21:17:00 to 27-MAY-17 21:18:00 (CST-6)
Location: (ADM)ARDMORE APT
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A television storm chaser observed a tornado develop about 3 miles south-southeast of Dougherty. The tornado is believed to have moved through a small portion of rural Carter County before crossing the Washita River into Murray County. No damage is known to have occurred.

Thunderstorm Wind in JEFFERSON, OKLAHOMA
From 27-MAY-17 22:25:00 to 27-MAY-17 22:25:00 (CST-6)
Location: RINGLING
Magnitude: 56.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Three power poles were snapped on highway 89 one half mile north of Ringling. Time estimated by radar.

Thunderstorm Wind in MAJOR, OKLAHOMA
From 27-MAY-17 22:27:00 to 27-MAY-17 22:27:00 (CST-6)
Location: CHESTER
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several power poles downed.

Thunderstorm Wind in JEFFERSON, OKLAHOMA
From 27-MAY-17 22:30:00 to 27-MAY-17 22:30:00 (CST-6)
Location: RINGLING
Magnitude: 62.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Tornado in MURRAY, OKLAHOMA
From 27-MAY-17 21:18:00 to 27-MAY-17 21:21:00 (CST-6)
Location: DOUGHERTY
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A television storm chaser observed a tornado develop about 3 miles south-southeast of Dougherty. The tornado is believed to have moved into Murray County after touching down in Carter County and crossing the Washita River. No damage was reported in the area.

Tornado in JOHNSTON, OKLAHOMA
From 27-MAY-17 21:39:00 to 27-MAY-17 21:41:00 (CST-6)
Location: TROY
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous spotters observed a tornado west of Troy. No damage was reported and the location is estimated.

Tornado in JEFFERSON, OKLAHOMA
From 27-MAY-17 22:06:00 to 27-MAY-17 22:13:00 (CST-6)
Location: RINGLING
Tornado F-scale: EFU
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A tornado was observed by a television storm chaser south of Loco and west-northwest of Ringling. No damage was reported and the specific path is estimated.

Hail in CARTER, OKLAHOMA
From 27-MAY-17 23:13:00 to 27-MAY-17 23:13:00 (CST-6)
Location: ARDMORE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in CARTER, OKLAHOMA
From 27-MAY-17 23:20:00 to 27-MAY-17 23:20:00 (CST-6)
Location: LONE GROVE
Magnitude: 51.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Thunderstorm Wind in GARFIELD, OKLAHOMA
From 27-MAY-17 23:57:00 to 27-MAY-17 23:57:00 (CST-6)
Location: (END)VANCE AFB ENID
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Hail in MCCLAIN, OKLAHOMA
From 28-MAY-17 00:54:00 to 28-MAY-17 00:54:00 (CST-6)
Location: WAYNE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in STEPHENS, OKLAHOMA
From 27-MAY-17 19:02:00 to 27-MAY-17 19:02:00 (CST-6)
Location: MARLOW
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in STEPHENS, OKLAHOMA
From 27-MAY-17 19:04:00 to 27-MAY-17 19:04:00 (CST-6)
Location: DUNCAN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter reported the hail was covering his yard.

Hail in GRADY, OKLAHOMA
From 27-MAY-17 19:12:00 to 27-MAY-17 19:12:00 (CST-6)
Location: RUSH SPRINGS
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in STEPHENS, OKLAHOMA
From 27-MAY-17 19:13:00 to 27-MAY-17 19:13:00 (CST-6)
Location: DUNCAN
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in COMANCHE, OKLAHOMA
From 27-MAY-17 19:18:00 to 27-MAY-17 19:18:00 (CST-6)
Location: LAWTON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in SEMINOLE, OKLAHOMA
From 27-MAY-17 19:22:00 to 27-MAY-17 19:22:00 (CST-6)
Location: KONAWA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Hail in COAL, OKLAHOMA
From 27-MAY-17 19:27:00 to 27-MAY-17 19:27:00 (CST-6)
Location: BROMIDE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in COMANCHE, OKLAHOMA
From 27-MAY-17 19:27:00 to 27-MAY-17 19:27:00 (CST-6)
Location: LAWTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in JOHNSTON, OKLAHOMA
From 27-MAY-17 19:49:00 to 27-MAY-17 19:49:00 (CST-6)
Location: WAPANUCKA
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in POTTAWATOMIE, OKLAHOMA
From 27-MAY-17 19:50:00 to 27-MAY-17 19:50:00 (CST-6)
Location: MAUD
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in MCCLAIN, OKLAHOMA
From 27-MAY-17 20:05:00 to 27-MAY-17 20:05:00 (CST-6)
Location: WASHINGTON
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MCCLAIN, OKLAHOMA
From 27-MAY-17 20:07:00 to 27-MAY-17 20:07:00 (CST-6)
Location: PURCELL
Magnitude: 4.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in POTTAWATOMIE, OKLAHOMA
From 27-MAY-17 20:07:00 to 27-MAY-17 20:07:00 (CST-6)
Location: MAUD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in COAL, OKLAHOMA
From 27-MAY-17 20:13:00 to 27-MAY-17 20:13:00 (CST-6)
Location: COALGATE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in MCCLAIN, OKLAHOMA
From 27-MAY-17 20:13:00 to 27-MAY-17 20:13:00 (CST-6)
Location: PURCELL
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MCCLAIN, OKLAHOMA
From 27-MAY-17 20:15:00 to 27-MAY-17 20:15:00 (CST-6)
Location: PURCELL
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in CLEVELAND, OKLAHOMA
From 27-MAY-17 20:31:00 to 27-MAY-17 20:31:00 (CST-6)
Location: LAKE THUNDERBIRD DAM
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in GARVIN, OKLAHOMA
From 27-MAY-17 20:31:00 to 27-MAY-17 20:31:00 (CST-6)
Location: ELMORE CITY
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in GARVIN, OKLAHOMA
From 27-MAY-17 20:32:00 to 27-MAY-17 20:32:00 (CST-6)
Location: HENNEPIN
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in COAL, OKLAHOMA
From 27-MAY-17 20:53:00 to 27-MAY-17 20:53:00 (CST-6)
Location: COALGATE
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Flash Flood in POTTAWATOMIE, OKLAHOMA
From 27-MAY-17 22:24:00 to 28-MAY-17 01:24:00 (CST-6)
Location: JOHNSON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Water was over highway 99.

Lightning in MURRAY, OKLAHOMA
From 27-MAY-17 21:30:00 to 27-MAY-17 21:30:00 (CST-6)
Location: TURNER FALLS
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A man was struck by lightning near Turner Falls. His clothes were blown from his body and he suffered severe burns, temporary paralysis, and hearing loss.

Hail in PONTOTOC, OKLAHOMA
From 27-MAY-17 18:57:00 to 27-MAY-17 18:57:00 (CST-6)
Location: VANOSS
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in STEPHENS, OKLAHOMA
From 27-MAY-17 19:00:00 to 27-MAY-17 19:00:00 (CST-6)
Location: DUNCAN
Magnitude: 2.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in MURRAY, OKLAHOMA
From 27-MAY-17 18:35:00 to 27-MAY-17 18:35:00 (CST-6)
Location: SULPHUR
Magnitude: 2.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Relayed via Twitter.

Hail in PONTOTOC, OKLAHOMA
From 27-MAY-17 18:37:00 to 27-MAY-17 18:37:00 (CST-6)
Location: VANOSS
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in MURRAY, OKLAHOMA
From 27-MAY-17 18:37:00 to 27-MAY-17 18:37:00 (CST-6)
Location: SULPHUR
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Hail in GARVIN, OKLAHOMA
From 27-MAY-17 18:45:00 to 27-MAY-17 18:45:00 (CST-6)
Location: STRATFORD
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Hail in PONTOTOC, OKLAHOMA
From 27-MAY-17 18:45:00 to 27-MAY-17 18:45:00 (CST-6)
Location: BYNG
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in JOHNSTON, OKLAHOMA
From 27-MAY-17 18:49:00 to 27-MAY-17 18:49:00 (CST-6)
Location: MILL CREEK
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Thunderstorm Wind in MURRAY, OKLAHOMA
From 27-MAY-17 21:09:00 to 27-MAY-17 21:09:00 (CST-6)
Location: DAVIS
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

No damage reported.

Thunderstorm Wind in CARTER, OKLAHOMA
From 27-MAY-17 21:17:00 to 27-MAY-17 21:17:00 (CST-6)
Location: SPRINGER
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

No damage reported.

Hail in CARTER, OKLAHOMA
From 27-MAY-17 17:41:00 to 27-MAY-17 17:41:00 (CST-6)
Location: LONE GROVE
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in CARTER, OKLAHOMA
From 27-MAY-17 17:46:00 to 27-MAY-17 17:46:00 (CST-6)
Location: LONE GROVE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flash Flood in LINCOLN, OKLAHOMA
From 27-MAY-17 22:25:00 to 28-MAY-17 01:25:00 (CST-6)
Location: PRAGUE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Water was over roads in town.

Thunderstorm Wind in WOODWARD, OKLAHOMA
From 27-MAY-17 21:55:00 to 27-MAY-17 21:55:00 (CST-6)
Location: WOODWARD
Magnitude: 61.00 MG
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Mesonet

Also EM reported numerous power lines, utility poles, and trees down as well as awnings and outbuildings damaged.

Hail in WOODWARD, OKLAHOMA
From 27-MAY-17 21:55:00 to 27-MAY-17 21:55:00 (CST-6)
Location: SHARON
Magnitude: 2.75 
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Reports of windows broken.

Hail in ELLIS, OKLAHOMA
From 27-MAY-17 21:33:00 to 27-MAY-17 21:33:00 (CST-6)
Location: FARGO
Magnitude: 2.75 
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Vehicles and houses damaged by wind blown hail.

Hail in GARVIN, OKLAHOMA
From 28-MAY-17 00:48:00 to 28-MAY-17 00:48:00 (CST-6)
Location: PAULS VALLEY
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in MURRAY, OKLAHOMA
From 27-MAY-17 21:45:00 to 28-MAY-17 00:45:00 (CST-6)
Location: SULPHUR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Some roads that typically flood were barricaded due to flowing water.