Many thunderstorms developed across the Oklahoma and Texas panhandles. One of these storms produced a long track tornado that eventually moved into Roger Mills County, Oklahoma. After moving east into Oklahoma, these storms developed into three squall lines with many embedded bow echoes that moved across Oklahoma and portions of Texas. There were numerous damage reports across Oklahoma due to the strong winds produced by the squall lines. A brief tornado, embedded in one of the squall lines, also developed in Lincoln County producing F1 damage.

Hail in DEWEY, OKLAHOMA
From 16-MAY-03 00:00:00 to 16-MAY-03 00:00:00 (CST)
Location: TALOGA
Magnitude: 0.88 
Reported by: LAW ENFORCEMENT

Thunderstorm Wind in ROGER MILLS, OKLAHOMA
From 15-MAY-03 22:45:00 to 15-MAY-03 22:55:00 (CST)
Location: CHEYENNE
Magnitude: 75 EG
Property damage: 50K
Reported by: EMERGENCY MANAGER

Strong straight-line winds from a developing bow echo caused damage across the Cheyenne area. Several outbuildings were damaged or destroyed. A grain silo had the top ripped off. Several homes sustained shingle and roof damage, especially in southwest sections of town. The Cheyenne airport, Mignon Laird Municipal Airport,  had several buildings destroyed or damaged along with six airplanes heavily damaged. The Cheyenne High School also sustained some roof damage.

Thunderstorm Wind in WOODS, OKLAHOMA
From 15-MAY-03 23:45:00 to 15-MAY-03 23:45:00 (CST)
Location: WAYNOKA
Magnitude: 52 EG
Reported by: GENERAL PUBLIC

Thunderstorm Wind in BLAINE, OKLAHOMA
From 16-MAY-03 00:20:00 to 16-MAY-03 00:20:00 (CST)
Location: CANTON LAKE
Magnitude: 56 EG
Reported by: GENERAL PUBLIC

Wind was reported at the Canton Lake Dam.

Thunderstorm Wind in ALFALFA, OKLAHOMA
From 16-MAY-03 00:20:00 to 16-MAY-03 00:20:00 (CST)
Location: CHEROKEE
Magnitude: 61 EG
Reported by: TRAINED SPOTTER

Thunderstorm Wind in GARVIN, OKLAHOMA
From 16-MAY-03 02:15:00 to 16-MAY-03 02:15:00 (CST)
Location: STRATFORD
Magnitude: 64 MG
Reported by: AWOS,ASOS,MESONET,ETC

Wind was measured by the Oklahoma mesonet.

Thunderstorm Wind in PAYNE, OKLAHOMA
From 16-MAY-03 02:15:00 to 16-MAY-03 02:15:00 (CST)
Location: CUSHING
Magnitude: 50 MG
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in SEMINOLE, OKLAHOMA
From 16-MAY-03 02:40:00 to 16-MAY-03 02:40:00 (CST)
Location: BOWLEGS
Magnitude: 54 MG
Reported by: AWOS,ASOS,MESONET,ETC

Wind was measured by the Oklahoma mesonet.

Hail in CARTER, OKLAHOMA
From 16-MAY-03 03:28:00 to 16-MAY-03 03:28:00 (CST)
Location: ARDMORE
Magnitude: 0.88 
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in POTTAWATOMIE, OKLAHOMA
From 16-MAY-03 02:50:00 to 16-MAY-03 02:50:00 (CST)
Location: SHAWNEE
Magnitude: 54 MG
Reported by: AWOS,ASOS,MESONET,ETC

Wind was measured by the Oklahoma mesonet.

Thunderstorm Wind in JOHNSTON, OKLAHOMA
From 16-MAY-03 03:50:00 to 16-MAY-03 03:50:00 (CST)
Location: TISHOMINGO
Magnitude: 56 EG
Property damage: 1.5K
Reported by: EMERGENCY MANAGER

Several trees were downed and windows broken.

Hail in JOHNSTON, OKLAHOMA
From 16-MAY-03 03:50:00 to 16-MAY-03 03:50:00 (CST)
Location: TISHOMINGO
Magnitude: 0.88 
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in TILLMAN, OKLAHOMA
From 16-MAY-03 00:19:00 to 16-MAY-03 00:19:00 (CST)
Location: DAVIDSON
Magnitude: 61 EG
Property damage: 1.5K
Reported by: LAW ENFORCEMENT

A small barn was blown over, one and a quarter miles west of the intersection of Highway 54 and Highway 70.

Hail in ROGER MILLS, OKLAHOMA
From 15-MAY-03 20:55:00 to 15-MAY-03 20:55:00 (CST)
Location: DURHAM
Magnitude: 0.75 
Reported by: TRAINED SPOTTER

Thunderstorm Wind in GARVIN, OKLAHOMA
From 16-MAY-03 02:10:00 to 16-MAY-03 02:10:00 (CST)
Location: STRATFORD
Magnitude: 54 MG
Reported by: AWOS,ASOS,MESONET,ETC

Wind was measured by the Oklahoma mesonet.

Thunderstorm Wind in MCCLAIN, OKLAHOMA
From 16-MAY-03 02:15:00 to 16-MAY-03 02:15:00 (CST)
Location: BYARS
Magnitude: 64 MG
Reported by: AWOS,ASOS,MESONET,ETC

Wind was measured by the Oklahoma mesonet.

Thunderstorm Wind in ROGER MILLS, OKLAHOMA
From 15-MAY-03 22:35:00 to 15-MAY-03 22:35:00 (CST)
Location: CHEYENNE
Magnitude: 58 MG
Reported by: AWOS,ASOS,MESONET,ETC

Wind was measured by the Oklahoma mesonet.

Thunderstorm Wind in STEPHENS, OKLAHOMA
From 16-MAY-03 01:20:00 to 16-MAY-03 01:20:00 (CST)
Location: DUNCAN
Magnitude: 55 MG
Reported by: AMATEUR RADIO

Thunderstorm Wind in SEMINOLE, OKLAHOMA
From 16-MAY-03 02:35:00 to 16-MAY-03 02:35:00 (CST)
Location: BOWLEGS
Magnitude: 56 EG
Property damage: 5K
Reported by: EMERGENCY MANAGER

An area 500 yards long sustained damage to numerous trees.

Thunderstorm Wind in SEMINOLE, OKLAHOMA
From 16-MAY-03 02:43:00 to 16-MAY-03 02:43:00 (CST)
Location: CROMWELL
Magnitude: 78 EG
Property damage: 20K
Reported by: EMERGENCY MANAGER

A house was reported damaged along with a barn destroyed. A trailer house was moved from its original position. Both a well-house and yard play equipment were reported missing.

Tornado in ROGER MILLS, OKLAHOMA
From 15-MAY-03 22:03:00 to 15-MAY-03 22:17:00 (CST)
Location: SWEETWATER
Tornado F-scale: F1
Property damage: 65K
Reported by: EMERGENCY MANAGER

This long track tornado began south of Kelton in Wheeler County, Texas and moved northeast crossing the state line approximately three-quarters of a mile north of Highway 152. This tornado was a half a mile wide when it crossed the state line. The tornado moved east-northeast before dissipating three miles north of Sweetwater. The tornado damaged a grain silo and mobile home just after crossing the state line. The next significant area of damage was three miles northwest of Sweetwater where the tornado went through a dairy farm. The hay barn, dairy barn, and another large barn were damaged or destroyed. A trailer was also destroyed. The roof of the frame house was removed. The tornado also injured three cows that eventually had to be put down. Shortly before dissipating the tornado ripped the roof off a church parsonage and damaged the Assembly of God Church that was nearby.

Hail in JACKSON, OKLAHOMA
From 16-MAY-03 00:11:00 to 16-MAY-03 00:11:00 (CST)
Location: ELDORADO
Magnitude: 0.75 
Reported by: AMATEUR RADIO

Thunderstorm Wind in ALFALFA, OKLAHOMA
From 16-MAY-03 00:32:00 to 16-MAY-03 00:32:00 (CST)
Location: CHEROKEE
Magnitude: 61 EG
Property damage: .5K
Reported by: LAW ENFORCEMENT

Numerous trees were downed in a park on the north side of town.

Thunderstorm Wind in GARFIELD, OKLAHOMA
From 16-MAY-03 01:01:00 to 16-MAY-03 01:01:00 (CST)
Location: VANCE AFB
Magnitude: 66 MG
Reported by: AWOS,ASOS,MESONET,ETC

Tornado in LINCOLN, OKLAHOMA
From 16-MAY-03 02:53:00 to 16-MAY-03 02:58:00 (CST)
Location: PRAGUE
Tornado F-scale: F1
Property damage: 10K
Reported by: EMERGENCY MANAGER

This tornado occurred in the middle of the night and was embedded within a bowing portion of a squall line. The tornado destroyed a barn and caused tree damage as it moved northeast.

Thunderstorm Wind in TILLMAN, OKLAHOMA
From 16-MAY-03 00:12:00 to 16-MAY-03 00:12:00 (CST)
Location: DAVIDSON
Magnitude: 56 EG
Property damage: 4.5K
Reported by: EMERGENCY MANAGER

Fourteen power poles were snapped.

Hail in ATOKA, OKLAHOMA
From 16-MAY-03 04:20:00 to 16-MAY-03 04:20:00 (CST)
Location: STRINGTOWN
Magnitude: 0.88 
Reported by: GENERAL PUBLIC

Thunderstorm Wind in PONTOTOC, OKLAHOMA
From 16-MAY-03 02:20:00 to 16-MAY-03 02:40:00 (CST)
Location: ADA
Magnitude: 61 EG
Property damage: 300K
Reported by: EMERGENCY MANAGER

Estimated straight-line wind gusts ranging from 60 to 70 mph caused sporadic damage along a path approximately 17 miles long, with Ada receiving the worst damage. One home was damaged in Latta, which is 2.5 miles SW of Ada. The Red Cross reported 85 homes damaged along the path with lots of shingle and roof damage. Several businesses in Ada were also damaged. Numerous trees were damaged with large limbs downed near the courthouse. A nursing home lost a portion of its roof. Several garage doors were blown in across the area. Some debris from factories in Ada were found approximately 4 miles east of town.

Thunderstorm Wind in ROGER MILLS, OKLAHOMA
From 15-MAY-03 22:59:00 to 15-MAY-03 22:59:00 (CST)
Location: HAMMON
Magnitude: 52 EG
Reported by: GENERAL PUBLIC

Thunderstorm Wind in HARPER, OKLAHOMA
From 15-MAY-03 23:00:00 to 15-MAY-03 23:00:00 (CST)
Location: BUFFALO
Magnitude: 61 EG
Property damage: .5K
Reported by: GENERAL PUBLIC

A large cattle feeder was blown a quarter of a mile.

Thunderstorm Wind in CUSTER, OKLAHOMA
From 15-MAY-03 23:05:00 to 15-MAY-03 23:05:00 (CST)
Location: BUTLER
Magnitude: 57 MG
Reported by: AWOS,ASOS,MESONET,ETC

Wind was measured by the Oklahoma mesonet.

Thunderstorm Wind in GARVIN, OKLAHOMA
From 16-MAY-03 02:06:00 to 16-MAY-03 02:06:00 (CST)
Location: STRATFORD
Magnitude: 52 EG
Property damage: .1K
Reported by: NEWSPAPER

A large tree was snapped.

Thunderstorm Wind in GARVIN, OKLAHOMA
From 16-MAY-03 01:39:00 to 16-MAY-03 01:39:00 (CST)
Location: ELMORE CITY
Magnitude: 69 EG
Property damage: 10K
Reported by: AMATEUR RADIO

The roof to a school sustained major damage. Power lines and trees were also downed.

Thunderstorm Wind in KAY, OKLAHOMA
From 16-MAY-03 01:59:00 to 16-MAY-03 02:04:00 (CST)
Location: PONCA CITY
Magnitude: 65 EG
Property damage: 20K
Reported by: EMERGENCY MANAGER

Several roofs and windows of homes were damaged. Vehicle windows were also broken along with downed trees and a damaged air conditioning unit. The damage was sustained within a 2 mile long and 2 block wide path.

Thunderstorm Wind in ELLIS, OKLAHOMA
From 15-MAY-03 21:10:00 to 15-MAY-03 21:10:00 (CST)
Location: SHATTUCK
Magnitude: 53 MG
Reported by: FIRE DEPT/RESCUE SQUAD

Hail in ALFALFA, OKLAHOMA
From 16-MAY-03 00:20:00 to 16-MAY-03 00:20:00 (CST)
Location: CHEROKEE
Magnitude: 0.88 
Reported by: TRAINED SPOTTER

Thunderstorm Wind in GARVIN, OKLAHOMA
From 16-MAY-03 02:05:00 to 16-MAY-03 02:05:00 (CST)
Location: STRATFORD
Magnitude: 56 EG
Property damage: .25K
Reported by: NEWSPAPER

A large tree was uprooted.

Hail in ROGER MILLS, OKLAHOMA
From 15-MAY-03 22:30:00 to 15-MAY-03 22:30:00 (CST)
Location: SWEETWATER
Magnitude: 1.00 
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in ROGER MILLS, OKLAHOMA
From 15-MAY-03 22:30:00 to 15-MAY-03 22:30:00 (CST)
Location: SWEETWATER
Magnitude: 52 MG
Reported by: EMERGENCY MANAGER

Thunderstorm Wind in BECKHAM, OKLAHOMA
From 15-MAY-03 22:30:00 to 15-MAY-03 22:30:00 (CST)
Location: MAYFIELD
Magnitude: 61 EG
Property damage: 1K
Reported by: GENERAL PUBLIC

A house located on the south side of Highway 152 had some roof damage.

Thunderstorm Wind in MAJOR, OKLAHOMA
From 16-MAY-03 00:20:00 to 16-MAY-03 00:20:00 (CST)
Location: FAIRVIEW
Magnitude: 52 MG
Reported by: AWOS,ASOS,MESONET,ETC

Wind was measured by the Oklahoma mesonet.

Thunderstorm Wind in TILLMAN, OKLAHOMA
From 16-MAY-03 00:20:00 to 16-MAY-03 00:20:00 (CST)
Location: GRANDFIELD
Magnitude: 51 MG
Reported by: AWOS,ASOS,MESONET,ETC

Wind was measured by the Oklahoma mesonet.

Thunderstorm Wind in ALFALFA, OKLAHOMA
From 16-MAY-03 00:25:00 to 16-MAY-03 00:25:00 (CST)
Location: CHEROKEE
Magnitude: 50 MG
Reported by: AWOS,ASOS,MESONET,ETC

Wind was measured by the Oklahoma mesonet.

Hail in ROGER MILLS, OKLAHOMA
From 15-MAY-03 22:35:00 to 15-MAY-03 22:35:00 (CST)
Location: SWEETWATER
Magnitude: 1.00 
Reported by: AMATEUR RADIO

Hail was reported at the intersection of Highway 152 and Highway 30.

Hail in JACKSON, OKLAHOMA
From 16-MAY-03 00:32:00 to 16-MAY-03 00:32:00 (CST)
Location: ALTUS
Magnitude: 0.88 
Reported by: AMATEUR RADIO

Thunderstorm Wind in ROGER MILLS, OKLAHOMA
From 15-MAY-03 22:40:00 to 15-MAY-03 22:40:00 (CST)
Location: CHEYENNE
Magnitude: 70 MG
Reported by: AWOS,ASOS,MESONET,ETC

Wind was measured by the Oklahoma mesonet.

Thunderstorm Wind in ELLIS, OKLAHOMA
From 15-MAY-03 22:40:00 to 15-MAY-03 22:40:00 (CST)
Location: GAGE
Magnitude: 52 EG
Property damage: .05K
Reported by: GENERAL PUBLIC

Several three inch diameter tree limbs were downed.

Thunderstorm Wind in JACKSON, OKLAHOMA
From 16-MAY-03 00:00:00 to 16-MAY-03 00:00:00 (CST)
Location: DUKE
Magnitude: 56 EG
Property damage: .1K
Reported by: GENERAL PUBLIC

Several tree limbs were downed.

Thunderstorm Wind in WASHITA, OKLAHOMA
From 16-MAY-03 00:00:00 to 16-MAY-03 00:00:00 (CST)
Location: DILL CITY
Magnitude: 65 EG
Reported by: GENERAL PUBLIC

Thunderstorm Wind in JACKSON, OKLAHOMA
From 16-MAY-03 00:11:00 to 16-MAY-03 00:11:00 (CST)
Location: ELDORADO
Magnitude: 52 EG
Reported by: AMATEUR RADIO

Hail in ROGER MILLS, OKLAHOMA
From 15-MAY-03 22:59:00 to 15-MAY-03 22:59:00 (CST)
Location: HAMMON
Magnitude: 0.88 
Reported by: GENERAL PUBLIC

Thunderstorm Wind in JEFFERSON, OKLAHOMA
From 16-MAY-03 01:40:00 to 16-MAY-03 01:40:00 (CST)
Location: RINGLING
Magnitude: 55 MG
Reported by: AWOS,ASOS,MESONET,ETC

Wind was measured by the Oklahoma mesonet.

Thunderstorm Wind in GARVIN, OKLAHOMA
From 16-MAY-03 02:00:00 to 16-MAY-03 02:00:00 (CST)
Location: PAULS VALLEY
Magnitude: 63 MG
Reported by: AWOS,ASOS,MESONET,ETC

Wind was measured by the Oklahoma mesonet.