Severe storms developed near a stalled boundary across Oklahoma and the panhandles and moved eastward through the afternoon and evening of the 19th, causing widespread heavy rainfall and additional flooding. One fatality occurred near Cole in McClain county, as a vehicle was swept into floodwaters.

Thunderstorm Wind in KIOWA, OKLAHOMA
From 19-MAY-15 20:40:00 to 19-MAY-15 20:40:00 (CST-6)
Location: LONE WOLF
Magnitude: 56.00 EG
Reported by: Post Office

Post office employee reported several 4 to 6 inch tree limbs down. Time estimated by radar.

Hail in JEFFERSON, OKLAHOMA
From 19-MAY-15 20:42:00 to 19-MAY-15 20:42:00 (CST-6)
Location: ADDINGTON
Magnitude: 1.00 
Reported by: Trained Spotter

Hail in STEPHENS, OKLAHOMA
From 19-MAY-15 16:26:00 to 19-MAY-15 16:26:00 (CST-6)
Location: CORUM
Magnitude: 1.00 
Reported by: Amateur Radio

Hail in STEPHENS, OKLAHOMA
From 19-MAY-15 16:35:00 to 19-MAY-15 16:35:00 (CST-6)
Location: EMPIRE CITY
Magnitude: 1.75 
Reported by: Amateur Radio

No damage reported.

Hail in STEPHENS, OKLAHOMA
From 19-MAY-15 16:37:00 to 19-MAY-15 16:37:00 (CST-6)
Location: EMPIRE CITY
Magnitude: 1.00 
Reported by: Amateur Radio

Hail in CARTER, OKLAHOMA
From 19-MAY-15 21:14:00 to 19-MAY-15 21:14:00 (CST-6)
Location: ARDMORE
Magnitude: 1.25 
Reported by: Emergency Manager

Thunderstorm Wind in POTTAWATOMIE, OKLAHOMA
From 19-MAY-15 21:20:00 to 19-MAY-15 21:20:00 (CST-6)
Location: ST LOUIS
Magnitude: 65.00 EG
Reported by: Post Office

Post office employee reported one large tree down over 1410 road northwest of lake Konawa, along with several large tree limbs down across the Konawa area.

Thunderstorm Wind in CARTER, OKLAHOMA
From 19-MAY-15 22:02:00 to 19-MAY-15 22:02:00 (CST-6)
Location: ARDMORE
Magnitude: 56.00 EG
Reported by: Storm Chaser

Utility poles downed at 10th ave and Bailey street.

Flash Flood in TILLMAN, OKLAHOMA
From 19-MAY-15 15:32:00 to 19-MAY-15 18:32:00 (CST-6)
Location: LOVELAND
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Water over Highway 36.

Flash Flood in TILLMAN, OKLAHOMA
From 19-MAY-15 15:49:00 to 19-MAY-15 18:49:00 (CST-6)
Location: GRANDFIELD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Street flooding throughout town.

Tornado in MCCLAIN, OKLAHOMA
From 19-MAY-15 13:51:00 to 19-MAY-15 13:51:00 (CST-6)
Location: PURCELL
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Live coverage from helicopters of OKC television stations showed a brief tornado develop southwest of Purcell. No damage was reported and the location is estimated.

Tornado in TILLMAN, OKLAHOMA
From 19-MAY-15 14:54:00 to 19-MAY-15 15:04:00 (CST-6)
Location: GRANDFIELD
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Numerous storm chasers observed a large, multiple-vortex tornado to the west-southwest of Grandfield. Despite the size of the tornado, no damage was reported to the NWS.

Tornado in POTTAWATOMIE, OKLAHOMA
From 19-MAY-15 15:19:00 to 19-MAY-15 15:19:00 (CST-6)
Location: MACOMB
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Numerous spotters and law-enforcement officers reported a brief tornado in the Macomb/Brooksville area. The tornado was estimated to have occurred about 4 miles northwest of Macomb based on triangulation of the reports. No damage was reported.

Tornado in JEFFERSON, OKLAHOMA
From 19-MAY-15 17:16:00 to 19-MAY-15 17:19:00 (CST-6)
Location: TERRAL
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Multiple storm chasers reported a tornado estimated to be 4 miles north-northwest of Terral. No damage was reported.

Tornado in JEFFERSON, OKLAHOMA
From 19-MAY-15 17:23:00 to 19-MAY-15 17:31:00 (CST-6)
Location: RYAN
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotters and chasers reported a tornado east of US-81 approximately 4 miles south-southeast of Ryan. No damage was reported.

Flash Flood in CADDO, OKLAHOMA
From 19-MAY-15 16:32:00 to 19-MAY-15 19:32:00 (CST-6)
Location: ANADARKO
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Highway 62 on the east side of Anadarko submerged in several inches of running water.

Flash Flood in JEFFERSON, OKLAHOMA
From 19-MAY-15 17:37:00 to 19-MAY-15 20:37:00 (CST-6)
Location: RYAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Up to two feet of water over Highway 81 near Ryan.

Flash Flood in CLEVELAND, OKLAHOMA
From 19-MAY-15 18:33:00 to 19-MAY-15 21:33:00 (CST-6)
Location: NORMAN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flooding at Lindsey and McGee street.

Flash Flood in GRADY, OKLAHOMA
From 19-MAY-15 18:33:00 to 19-MAY-15 21:33:00 (CST-6)
Location: MIDDLEBERG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Area streets flooded in and around Blanchard.

Flash Flood in GRADY, OKLAHOMA
From 19-MAY-15 18:37:00 to 19-MAY-15 21:37:00 (CST-6)
Location: CHICKASHA ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Social media report of street flooding in and around Chickasha.

Flash Flood in CLEVELAND, OKLAHOMA
From 19-MAY-15 18:50:00 to 19-MAY-15 21:50:00 (CST-6)
Location: NORMAN
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water rescue at Main street and Merkle drive. No injuries reported.

Flash Flood in CLEVELAND, OKLAHOMA
From 19-MAY-15 19:04:00 to 19-MAY-15 22:04:00 (CST-6)
Location: NORMAN
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water rescue at Melrose drive and Garrison drive.

Tornado in CLEVELAND, OKLAHOMA
From 19-MAY-15 14:22:00 to 19-MAY-15 14:22:00 (CST-6)
Location: LEXINGTON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Other Federal Agency

A meteorologist with the National Severe Storms Laboratory observed a brief tornado estimated to be 4 miles east-northeast of Lexington. This tornado produced no known damage.

Tornado in JEFFERSON, OKLAHOMA
From 19-MAY-15 17:40:00 to 19-MAY-15 17:44:00 (CST-6)
Location: RYAN
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Storm spotters and chasers reported a tornado estimated to have moved from about 4 miles west of Oscar to 2 miles west-northwest of Oscar. No damage was reported.

Tornado in CARTER, OKLAHOMA
From 19-MAY-15 19:55:00 to 19-MAY-15 19:55:00 (CST-6)
Location: WILSON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A tornado was observed approximately 8 miles southwest of Wilson. No damage was reported.

Tornado in CARTER, OKLAHOMA
From 19-MAY-15 20:35:00 to 19-MAY-15 20:43:00 (CST-6)
Location: WILSON
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A tornado was observed south-southeast of Wilson. No damage was reported.

Flash Flood in CLEVELAND, OKLAHOMA
From 19-MAY-15 19:08:00 to 19-MAY-15 19:08:00 (CST-6)
Location: (OUN)NORMAN WESTHEIMER ARPT
Flood cause: Heavy Rain
Property damage: 50.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water rescue at Iowa street and Sherry avenue from stalled vehicle.

Flash Flood in CLEVELAND, OKLAHOMA
From 19-MAY-15 19:10:00 to 19-MAY-15 21:10:00 (CST-6)
Location: NOBLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Water over roadway at Etowah road and Highway 77.

Flash Flood in MCCLAIN, OKLAHOMA
From 19-MAY-15 19:22:00 to 19-MAY-15 21:22:00 (CST-6)
Location: NEWCASTLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

High water closed the 1800 block of Portland avenue.

Flash Flood in CLEVELAND, OKLAHOMA
From 19-MAY-15 19:44:00 to 19-MAY-15 22:44:00 (CST-6)
Location: NORMAN
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Water rescue at intersection of Boyd street and McGee in stalled vehicle.

Flash Flood in JACKSON, OKLAHOMA
From 19-MAY-15 21:26:00 to 20-MAY-15 00:26:00 (CST-6)
Location: ALTUS
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Two vehicles off the road along Highway 171 and 283 due to flooding.

Flash Flood in CARTER, OKLAHOMA
From 19-MAY-15 21:30:00 to 20-MAY-15 00:30:00 (CST-6)
Location: LONE GROVE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Numerous streets flooded in and around the Lone Grove and Ardmore areas.

Thunderstorm Wind in CARTER, OKLAHOMA
From 19-MAY-15 10:02:00 to 19-MAY-15 10:02:00 (CST-6)
Location: ARDMORE
Magnitude: 56.00 EG
Reported by: Storm Chaser

Utility poles downed at 10th avenue and Bailey street.

Thunderstorm Wind in GRADY, OKLAHOMA
From 19-MAY-15 12:55:00 to 19-MAY-15 12:55:00 (CST-6)
Location: MIDDLEBERG
Magnitude: 52.00 EG
Reported by: Public

Outbuildings were damaged. Time estimated from radar.

Hail in JEFFERSON, OKLAHOMA
From 19-MAY-15 17:03:00 to 19-MAY-15 17:03:00 (CST-6)
Location: RYAN
Magnitude: 1.00 
Reported by: Public

Thunderstorm Wind in MURRAY, OKLAHOMA
From 19-MAY-15 19:13:00 to 19-MAY-15 19:13:00 (CST-6)
Location: SULPHUR
Magnitude: 52.00 EG
Reported by: Park/Forest Service

National park service reported several 4 to 6 inch tree limbs down across Chickasaw NRA.

Hail in JEFFERSON, OKLAHOMA
From 19-MAY-15 19:44:00 to 19-MAY-15 19:44:00 (CST-6)
Location: CORNISH
Magnitude: 1.00 
Reported by: Public

Hail in HARMON, OKLAHOMA
From 19-MAY-15 19:45:00 to 19-MAY-15 19:45:00 (CST-6)
Location: HOLLIS
Magnitude: 1.75 
Reported by: Public

No damage reported.

Thunderstorm Wind in JEFFERSON, OKLAHOMA
From 19-MAY-15 19:56:00 to 19-MAY-15 19:56:00 (CST-6)
Location: SUGDEN
Magnitude: 56.00 EG
Reported by: Storm Chaser

Power lines damaged.

Thunderstorm Wind in POTTAWATOMIE, OKLAHOMA
From 19-MAY-15 20:25:00 to 19-MAY-15 20:25:00 (CST-6)
Location: ST LOUIS
Magnitude: 56.00 EG
Reported by: Post Office

Post office employee reports several large tree limbs down and damage to fences along highway 9 between Maud and Konawa. Time estimated by radar.

Thunderstorm Wind in GREER, OKLAHOMA
From 19-MAY-15 20:27:00 to 19-MAY-15 20:27:00 (CST-6)
Location: GRANITE
Magnitude: 70.00 EG
Reported by: Amateur Radio

No damage reported.

Flash Flood in HUGHES, OKLAHOMA
From 19-MAY-15 22:50:00 to 20-MAY-15 01:50:00 (CST-6)
Location: HOLDENVILLE
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous roads impassable due to flooding. One high water rescue with a stalled car.

Flash Flood in ATOKA, OKLAHOMA
From 20-MAY-15 02:00:00 to 20-MAY-15 05:00:00 (CST-6)
Location: STRINGTOWN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Heavy rain resulted in widespread street flooding. Small creeks and streams also running out of their banks.

Thunderstorm Wind in SEMINOLE, OKLAHOMA
From 19-MAY-15 21:20:00 to 19-MAY-15 21:20:00 (CST-6)
Location: KONAWA
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Post Office

Large tree down on 1410 road, with other large branches downed across the county.

Flash Flood in JEFFERSON, OKLAHOMA
From 19-MAY-15 19:50:00 to 19-MAY-15 22:50:00 (CST-6)
Location: GRADY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Portions of Highway 89 underwater and impassable.

Flash Flood in MCCLAIN, OKLAHOMA
From 20-MAY-15 03:00:00 to 20-MAY-15 06:00:00 (CST-6)
Location: COLE
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Broadcast Media

News 9 reports high water swept a vehicle into Walnut Creek near Cole. Some individuals were successfully rescued, but one man was unable to escape and ultimately perished in the flood waters. The vehicle was swept away near Highway 74B and May Ave north of Cole.

Flash Flood in COMANCHE, OKLAHOMA
From 20-MAY-15 03:00:00 to 20-MAY-15 06:00:00 (CST-6)
Location: (FSI)FORT SILL
Flood cause: Heavy Rain
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A man was swept away while attempting to take a vehicle across a low water crossing. The man's body was not found until several days later well downstream. The vehicle was swept into Medicine Creek at Fort Sill.

Tornado in MCCLAIN, OKLAHOMA
From 19-MAY-15 13:40:00 to 19-MAY-15 13:40:00 (CST-6)
Location: WAYNE
Tornado F-scale: EF0
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

A brief tornado was observed by a storm chaser via spotternetwork. No damage was reported and the location was estimated.

Hail in GARVIN, OKLAHOMA
From 19-MAY-15 13:03:00 to 19-MAY-15 13:03:00 (CST-6)
Location: LINDSAY
Magnitude: 1.25 
Reported by: Amateur Radio

Thunderstorm Wind in HARMON, OKLAHOMA
From 19-MAY-15 13:05:00 to 19-MAY-15 13:05:00 (CST-6)
Location: MADGE
Magnitude: 52.00 EG
Reported by: Trained Spotter

No damage reported.

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 19-MAY-15 13:40:00 to 19-MAY-15 13:40:00 (CST-6)
Location: NORMAN
Magnitude: 52.00 EG
Reported by: NWS Employee

Large tree limb downed.

Thunderstorm Wind in KIOWA, OKLAHOMA
From 19-MAY-15 14:10:00 to 19-MAY-15 14:10:00 (CST-6)
Location: LONE WOLF
Magnitude: 52.00 EG
Reported by: Post Office

Post office employee reported several large 4 to 6 inch tree limbs down in town. Time matched to radar.