The beginning of a very active period, the 18th started with a complex of thunderstorms that grew upscale producing wind and tornadoes in the morning and then finished with isolated supercells producing large hail across northern Oklahoma.

Hail in COMANCHE, OKLAHOMA
From 18-MAY-19 05:29:00 to 18-MAY-19 05:29:00 (CST-6)
Location: ELGIN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Hail in GRADY, OKLAHOMA
From 18-MAY-19 05:40:00 to 18-MAY-19 05:40:00 (CST-6)
Location: CHICKASHA ARPT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Time from radar.

Thunderstorm Wind in OKLAHOMA, OKLAHOMA
From 18-MAY-19 07:31:00 to 18-MAY-19 07:31:00 (CST-6)
Location: EDMOND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Large tree branches downed.

Thunderstorm Wind in OKLAHOMA, OKLAHOMA
From 18-MAY-19 07:31:00 to 18-MAY-19 07:31:00 (CST-6)
Location: EDMOND
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Large tree branch damage.

Hail in OKLAHOMA, OKLAHOMA
From 18-MAY-19 07:44:00 to 18-MAY-19 07:44:00 (CST-6)
Location: SPENCER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in CADDO, OKLAHOMA
From 18-MAY-19 06:56:00 to 18-MAY-19 06:56:00 (CST-6)
Location: CARNEGIE
Magnitude: 52.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Instrument measurement.

Thunderstorm Wind in CADDO, OKLAHOMA
From 18-MAY-19 07:05:00 to 18-MAY-19 07:05:00 (CST-6)
Location: FT COBB RES DAM
Magnitude: 55.00 MG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: ASOS

Thunderstorm Wind in GRADY, OKLAHOMA
From 18-MAY-19 07:15:00 to 18-MAY-19 07:15:00 (CST-6)
Location: CHICKASHA ARPT
Magnitude: 52.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Large tree blown down on to truck. Twitter report with a photo.

Thunderstorm Wind in PAYNE, OKLAHOMA
From 18-MAY-19 08:24:00 to 18-MAY-19 08:24:00 (CST-6)
Location: STILLWATER
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Large tree blown over. Twitter report with a picture.

Flash Flood in OKLAHOMA, OKLAHOMA
From 18-MAY-19 08:56:00 to 18-MAY-19 11:56:00 (CST-6)
Location: WARR ACRES
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Broadcast Media

High water on roadway. Water almost up to windows of a vehicle.

Thunderstorm Wind in PONTOTOC, OKLAHOMA
From 18-MAY-19 09:10:00 to 18-MAY-19 09:10:00 (CST-6)
Location: ADA
Magnitude: 56.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Two trees reported downed. Time estimated from radar.

Thunderstorm Wind in PONTOTOC, OKLAHOMA
From 18-MAY-19 09:10:00 to 18-MAY-19 09:10:00 (CST-6)
Location: ADA
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Two downed power lines as well as numerous tree limbs.  Time estimated from radar.

Flash Flood in CANADIAN, OKLAHOMA
From 18-MAY-19 09:11:00 to 18-MAY-19 12:11:00 (CST-6)
Location: MUSTANG
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Flash flooding in Mustang at 59th and Czech Hall Rd.

Thunderstorm Wind in CLEVELAND, OKLAHOMA
From 18-MAY-19 09:19:00 to 18-MAY-19 09:19:00 (CST-6)
Location: MOORE
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Tree uprooted at SW 119TH and Meridian in front of South Lakes soccer fields. Tree laying across road and blocking Meridian.

Thunderstorm Wind in COAL, OKLAHOMA
From 18-MAY-19 10:13:00 to 18-MAY-19 10:13:00 (CST-6)
Location: LEHIGH
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Some damage to trees and vegetation. No structural damage at  this time.

Hail in GRANT, OKLAHOMA
From 18-MAY-19 20:00:00 to 18-MAY-19 20:00:00 (CST-6)
Location: MEDFORD
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALFALFA, OKLAHOMA
From 18-MAY-19 18:20:00 to 18-MAY-19 18:20:00 (CST-6)
Location: CARMEN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in GRANT, OKLAHOMA
From 18-MAY-19 19:33:00 to 18-MAY-19 19:33:00 (CST-6)
Location: NASH
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flash Flood in OKLAHOMA, OKLAHOMA
From 18-MAY-19 09:49:00 to 18-MAY-19 12:49:00 (CST-6)
Location: WARR ACRES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Flowing water over road near NW 36th Street and May. Video on twitter.

Hail in GRANT, OKLAHOMA
From 18-MAY-19 19:52:00 to 18-MAY-19 19:52:00 (CST-6)
Location: POND CREEK
Magnitude: 1.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Thunderstorm Wind in JOHNSTON, OKLAHOMA
From 18-MAY-19 10:00:00 to 18-MAY-19 10:00:00 (CST-6)
Location: WAPANUCKA
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Part of a roof from a house awning flew off and landed on a car. Some minor tree damage.

Hail in WOODS, OKLAHOMA
From 18-MAY-19 16:18:00 to 18-MAY-19 16:18:00 (CST-6)
Location: AVARD
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ALFALFA, OKLAHOMA
From 18-MAY-19 18:04:00 to 18-MAY-19 18:04:00 (CST-6)
Location: CARMEN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in ALFALFA, OKLAHOMA
From 18-MAY-19 18:08:00 to 18-MAY-19 18:08:00 (CST-6)
Location: CARMEN
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in ALFALFA, OKLAHOMA
From 18-MAY-19 19:15:00 to 18-MAY-19 19:15:00 (CST-6)
Location: JET
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in BLAINE, OKLAHOMA
From 18-MAY-19 17:26:00 to 18-MAY-19 17:26:00 (CST-6)
Location: LONGDALE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in WOODS, OKLAHOMA
From 18-MAY-19 17:34:00 to 18-MAY-19 17:34:00 (CST-6)
Location: ALVA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Hail in BLAINE, OKLAHOMA
From 18-MAY-19 17:45:00 to 18-MAY-19 17:45:00 (CST-6)
Location: OKEENE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in PONTOTOC, OKLAHOMA
From 18-MAY-19 09:15:00 to 18-MAY-19 09:15:00 (CST-6)
Location: ADA
Magnitude: 52.00 EG
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Social Media

Report through Facebook with pictures of large tree branches downed. Time estimate from radar.

Thunderstorm Wind in ALFALFA, OKLAHOMA
From 18-MAY-19 10:05:00 to 18-MAY-19 10:05:00 (CST-6)
Location: GOLTRY
Magnitude: 52.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Minor damage to a plastic green house and minor damage to a metal roof at Highway One & Highway 75 in Calvin. A eight inch diameter tree limb was blown of a tree a mile east of Calvin on Highway One.

Thunderstorm Wind in GRADY, OKLAHOMA
From 18-MAY-19 07:13:00 to 18-MAY-19 07:13:00 (CST-6)
Location: NORGE
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Roof partially torn off of house.

Tornado in PAYNE, OKLAHOMA
From 18-MAY-19 08:27:00 to 18-MAY-19 08:27:00 (CST-6)
Location: STILLWATER
Tornado F-scale: EF0
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Emergency Manager

An outbuilding and detached garage were significantly damaged by a brief QLCS tornado.

Flash Flood in OKLAHOMA, OKLAHOMA
From 18-MAY-19 08:04:00 to 18-MAY-19 11:04:00 (CST-6)
Location: OKLAHOMA CITY
Flood cause: Heavy Rain
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Assisting 2nd person in stalled vehicle in high water near NW 19th and Ross in Oklahoma City.

Flash Flood in COMANCHE, OKLAHOMA
From 18-MAY-19 07:29:00 to 18-MAY-19 10:29:00 (CST-6)
Location: LAWTON
Flood cause: Heavy Rain
Property damage: 20.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Cars stuck in high water and a couple water rescues from flooded out cars.

Flash Flood in OKLAHOMA, OKLAHOMA
From 18-MAY-19 07:57:00 to 18-MAY-19 10:57:00 (CST-6)
Location: WARR ACRES
Flood cause: Heavy Rain
Property damage: 10.00K
Crop damage: 0.00K
Reported by: Fire Department/Rescue

Firefighters rescued person trapped in vehicle in high water at NW 16th and Meridian. Water reported to be up to her car windows.

Tornado in COMANCHE, OKLAHOMA
From 18-MAY-19 06:37:00 to 18-MAY-19 06:38:00 (CST-6)
Location: GERONIMO
Tornado F-scale: EF2
Property damage: 150.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

A QLCS tornado destroyed two homes about three miles east of Geronimo. One home had most exterior walls collapsed while another house just across the street to the north had it's roof removed and many of the exterior walls collapsed. A few power poles were snapped and a tree was uprooted.

Thunderstorm Wind in JOHNSTON, OKLAHOMA
From 18-MAY-19 09:50:00 to 18-MAY-19 09:50:00 (CST-6)
Location: WAPANUCKA
Magnitude: 52.00 EG
Property damage: 0.10K
Crop damage: 0.00K
Reported by: Emergency Manager

Large tree branches downed, sheet metal wall with wooden support knocked over.

Hail in WOODS, OKLAHOMA
From 18-MAY-19 17:12:00 to 18-MAY-19 17:12:00 (CST-6)
Location: WAYNOKA
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Spotter network report.

Tornado in COAL, OKLAHOMA
From 18-MAY-19 10:18:00 to 18-MAY-19 10:18:00 (CST-6)
Location: COTTONWOOD
Tornado F-scale: EF0
Property damage: 25.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A brief QLCS tornado caused damage at a natural gas production facility that was under construction about 8 miles north-northeast of Coalgate. Multiple large shipping containers were blown over and light frame structures were damaged. Flying debris damaged numerous vehicles and injured 3 people.

Hail in BLAINE, OKLAHOMA
From 18-MAY-19 17:35:00 to 18-MAY-19 17:35:00 (CST-6)
Location: HOMESTEAD
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in PAYNE, OKLAHOMA
From 18-MAY-19 08:33:00 to 18-MAY-19 08:33:00 (CST-6)
Location: INGALLS
Tornado F-scale: EF0
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Emergency Manager

A brief QLCS tornado significantly damaged three barns and a shop about a half mile east of Ingalls.