An area of storms moved out of Kansas into northwest Oklahoma early on the 15th, then marched southeastward through the afternoon. A second round started later that evening across central Texas and the Texas panhandle in the vicinity of several boundaries before moving east and northeast into Oklahoma.

Thunderstorm Wind in GRADY, OKLAHOMA
From 15-MAY-18 11:30:00 to 15-MAY-18 11:30:00 (CST-6)
Location: CHICKASHA ARPT
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Trees and power poles downed by winds. Gas station awning collapsed. Roof damage to several structures including a church.

Flash Flood in GRADY, OKLAHOMA
From 15-MAY-18 11:50:00 to 15-MAY-18 14:50:00 (CST-6)
Location: CHICKASHA ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

One to two feet of water on highway 81 in Chickasha. Some roadways had up to three feet of water flowing over them.

Hail in CADDO, OKLAHOMA
From 15-MAY-18 10:14:00 to 15-MAY-18 10:14:00 (CST-6)
Location: CARNEGIE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GRADY, OKLAHOMA
From 15-MAY-18 11:10:00 to 15-MAY-18 11:10:00 (CST-6)
Location: VERDEN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in GRADY, OKLAHOMA
From 15-MAY-18 11:24:00 to 15-MAY-18 11:24:00 (CST-6)
Location: CHICKASHA ARPT
Magnitude: 50.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Thunderstorm Wind in GRADY, OKLAHOMA
From 15-MAY-18 11:40:00 to 15-MAY-18 11:40:00 (CST-6)
Location: NORGE
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in STEPHENS, OKLAHOMA
From 15-MAY-18 12:46:00 to 15-MAY-18 12:46:00 (CST-6)
Location: BRAY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in GARVIN, OKLAHOMA
From 15-MAY-18 13:12:00 to 15-MAY-18 13:12:00 (CST-6)
Location: PAULS VALLEY
Magnitude: 56.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: AWOS

Hail in GARVIN, OKLAHOMA
From 15-MAY-18 13:16:00 to 15-MAY-18 13:16:00 (CST-6)
Location: WYNNEWOOD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Ground covered in hail by a few inches.

Thunderstorm Wind in MURRAY, OKLAHOMA
From 15-MAY-18 13:38:00 to 15-MAY-18 13:38:00 (CST-6)
Location: SULPHUR
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Small limbs down. Observer estimated 60-70 mph winds.

Thunderstorm Wind in MURRAY, OKLAHOMA
From 15-MAY-18 13:40:00 to 15-MAY-18 13:40:00 (CST-6)
Location: SULPHUR
Magnitude: 57.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in BRYAN, OKLAHOMA
From 15-MAY-18 15:08:00 to 15-MAY-18 15:08:00 (CST-6)
Location: MEAD
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in JACKSON, OKLAHOMA
From 15-MAY-18 22:25:00 to 15-MAY-18 22:25:00 (CST-6)
Location: (LTS)ALTUS AFB
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Thunderstorm Wind in JACKSON, OKLAHOMA
From 15-MAY-18 22:30:00 to 15-MAY-18 22:30:00 (CST-6)
Location: ALTUS
Magnitude: 63.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Mesonet

Hail in CADDO, OKLAHOMA
From 15-MAY-18 23:07:00 to 15-MAY-18 23:07:00 (CST-6)
Location: CARNEGIE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Thunderstorm Wind in GRADY, OKLAHOMA
From 15-MAY-18 11:40:00 to 15-MAY-18 11:40:00 (CST-6)
Location: NORGE
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Power pole blown down on 16th street.

Thunderstorm Wind in GARVIN, OKLAHOMA
From 15-MAY-18 13:16:00 to 15-MAY-18 13:16:00 (CST-6)
Location: WYNNEWOOD
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Public

Carport and trees damaged on N county road 3300. Radar estimated time.

Thunderstorm Wind in MURRAY, OKLAHOMA
From 15-MAY-18 13:40:00 to 15-MAY-18 13:40:00 (CST-6)
Location: SULPHUR
Magnitude: 56.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Roof damage was reported. Time estimated based on previous reports.

Thunderstorm Wind in MURRAY, OKLAHOMA
From 15-MAY-18 13:40:00 to 15-MAY-18 13:40:00 (CST-6)
Location: SULPHUR
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several reports of tree damage and downed powerlines. Time estimated based on previous reports.

Thunderstorm Wind in MURRAY, OKLAHOMA
From 15-MAY-18 13:40:00 to 15-MAY-18 13:40:00 (CST-6)
Location: SULPHUR
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Several tree limbs snapped up to a foot in diameter. Time estimated based on nearby  Mesonet report.

Flash Flood in GARVIN, OKLAHOMA
From 15-MAY-18 13:45:00 to 15-MAY-18 16:45:00 (CST-6)
Location: PAULS VALLEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: County Official

Eight inches of water flowing over Highway 19 and Walnut St intersection.

Flash Flood in MURRAY, OKLAHOMA
From 15-MAY-18 14:20:00 to 15-MAY-18 17:20:00 (CST-6)
Location: SULPHUR
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Water over the roadway. Estimated 4-6 inches from photo.