Hail, Harmon
- When
- May 25, 5:00 PM CST
- Where
- Harmon County, 4 mi NE of Madge
- Measured
- 0.75 in hail
- Reported by
- GENERAL PUBLIC
- Coordinates
- 34.930, -99.900
Tornadoes and Hail in Oklahoma, May 25, 1999
Severe thunderstorms spawned 6 tornadoes and produced very large hail over portions of western Oklahoma during the evening of the 25th. Fortunately, all of the tornadoes touched down in sparsely populated areas with no known damage.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- $500,000
- Crop damage
- $200,000
- Events
- 20
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
What happened
The episode as NWS OUN wrote it up.
Severe thunderstorms spawned 6 tornadoes and produced very large hail over portions of western Oklahoma during the evening of the 25th. Fortunately, all of the tornadoes touched down in sparsely populated areas with no known damage. Thus, all were rated F0. The first tornado formed 5 miles north of Madge in Harmon County and was on the ground for only a short period of time. The 2nd tornado was reported by an amateur radio operator 6 miles east of Vinson in Harmon County. The tornado touched down in an open field with no known damage. The 3rd tornado was also witnessed by an amateur radio operator and formed 11 miles west of Mangum in Greer County. The tornado was on the ground for only a short period of time before dissipating. The 4th tornado was reported by Altus EOC in Jackson County, touching down briefly in an open field with no known damage. The 5th tornado was seen about 3 miles west of Altus Air Force Base, also in Jackson County, and dissipated 6 minutes later with no damage. The 6th tornado was observed by a reserve deputy in Manitou in Tillman County, touching down west of Manitou with no known damage. In Altus in Jackson county, hundreds of homes, numerous businesses, and the Altus High School Vo-tech center suffered major damage due to giant hail, occasionally to the size of softballs (4.5 inches in diameter). Significant damage also occurred to wheat and cotton crop in Altus and in Greer County, 2 miles south-southwest of Mangum.
The radar
The national radar mosaic for the moment the first event began.
Event by event
11 hail, 6 tornado, 3 thunderstorm wind. Local standard time, as filed.
Tornado, Harmon
- When
- May 25, 5:15 PM CST
- Where
- Harmon County, 5 mi N of Madge
- Rating
- F0
- Path length
- 0.1 mi
- Path width
- 25 yd
- Reported by
- GENERAL PUBLIC
- Coordinates
- 34.970, -99.950
Tornado, Harmon
- When
- May 25, 5:31 PM CST
- Where
- Harmon County, 6 mi E of Vinson
- Rating
- F0
- Path length
- 0.2 mi
- Path width
- 25 yd
- Reported by
- GENERAL PUBLIC
- Coordinates
- 34.900, -99.770
Tornado, Greer
- When
- May 25, 5:51 PM CST
- Where
- Greer County, 11 mi W of Mangum
- Rating
- F0
- Path length
- 0.1 mi
- Path width
- 25 yd
- Reported by
- AMATEUR RADIO
- Coordinates
- 34.880, -99.700
Tornado, Greer
- When
- May 25, 6:04 PM CST
- Where
- Greer County, 1 mi SW of Russell
- Rating
- F0
- Path length
- 0.2 mi
- Path width
- 25 yd
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 34.750, -99.680
Hail, Greer
- When
- May 25, 6:05 PM CST
- Where
- Greer County, 6 mi SW of Mangum
- Measured
- 1.25 in hail
- Reported by
- GENERAL PUBLIC
- Coordinates
- 34.820, -99.570
Hail, Greer
- When
- May 25, 6:11 PM CST
- Where
- Greer County, 2 mi SSW of Mangum
- Measured
- 2.75 in hail
- Crop damage
- $100,000
- Reported by
- AMATEUR RADIO
- Coordinates
- 34.850, -99.520
Hail, Jackson
- When
- May 25, 6:34 PM CST
- Where
- Jackson County, Martha
- Measured
- 1 in hail
- Reported by
- AMATEUR RADIO
- Coordinates
- 34.720, -99.380
Tornado, Jackson
- When
- May 25, 6:35 PM CST to 6:41 PM CST
- Where
- Jackson County, Altus Afb to 3 mi SW of Altus Afb
- Rating
- F0
- Path length
- 1.5 mi
- Path width
- 50 yd
- Reported by
- OTHER FEDERAL AGENCY
- Coordinates
- 34.650, -99.320
Hail, Jackson
- When
- May 25, 6:38 PM CST
- Where
- Jackson County, Altus
- Measured
- 1.75 in hail
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 34.630, -99.330
Hail, Jackson
- When
- May 25, 6:40 PM CST
- Where
- Jackson County, Altus
- Measured
- 2.75 in hail
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 34.630, -99.330
Hail, Jackson
- When
- May 25, 6:50 PM CST
- Where
- Jackson County, Altus
- Measured
- 4.5 in hail
- Property damage
- $500,000
- Crop damage
- $100,000
- Reported by
- GENERAL PUBLIC
- Coordinates
- 34.630, -99.330
Hail, Jackson
- When
- May 25, 6:55 PM CST
- Where
- Jackson County, Altus
- Measured
- 1.5 in hail
- Reported by
- OFFICIAL NWS OBS.
- Coordinates
- 34.630, -99.330
Hail, Jackson
- When
- May 25, 7:10 PM CST
- Where
- Jackson County, 6 mi E of Altus
- Measured
- 1 in hail
- Reported by
- GENERAL PUBLIC
- Coordinates
- 34.630, -99.230
Tornado, Tillman
- When
- May 25, 7:16 PM CST to 7:22 PM CST
- Where
- Tillman County, Manitou to 11 mi SW of Manitou
- Rating
- F0
- Path length
- 1.5 mi
- Path width
- 50 yd
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 34.430, -99.170
Thunderstorm Wind, Tillman
- When
- May 25, 7:30 PM CST
- Where
- Tillman County, 4 mi S of Tipton
- Measured
- 57 kt (66 mph)
- Reported by
- AWOS,ASOS,MESONET,ETC
- Coordinates
- 34.450, -99.130
Hail, Tillman
- When
- May 25, 7:37 PM CST
- Where
- Tillman County, 2 mi W of Frederick
- Measured
- 1.25 in hail
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 34.380, -99.050
Hail, Tillman
- When
- May 25, 7:45 PM CST
- Where
- Tillman County, Frederick
- Measured
- 0.75 in hail
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 34.380, -99.020
Thunderstorm Wind, Tillman
- When
- May 25, 7:45 PM CST
- Where
- Tillman County, Frederick
- Measured
- 52 kt (60 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 34.380, -99.020
Thunderstorm Wind, Jackson
- When
- May 25, 8:21 PM CST
- Where
- Jackson County, Altus
- Measured
- 56 kt (64 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 34.630, -99.330
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- Tornado
- A violently rotating column of air in contact with the ground and extending from a thunderstorm, filed with its path, width and Fujita or Enhanced Fujita rating from the damage survey.
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornado and Hail in Texas, May 25 to 26, 1999
- Tornadoes and Flash Flooding in Texas, May 25, 1999
- Tornadoes in Texas, May 25, 1999
- Tornadoes and Hail in Texas, May 25 to 26, 1999
- Damaging Wind and Lightning Strike in New York, May 25, 1999
- Flash Flood and Hail in Texas, May 25 to 26, 1999
- Damaging Wind in Massachusetts, May 25, 1999
- Tornado and Hail in New Mexico, May 25, 1999
- Hail in New Mexico, May 25, 1999
- Heavy Snow and Heavy Rain in Alaska, May 25, 1999
- Flooding in Montana, May 25 to 28, 1999
- Wildfire in Florida, May 25 to 30, 1999
More
Every storm in Oklahoma in 1999Every state in 1999This day in weather historyThe tornado archive for Oklahoma, 1999Warnings in Oklahoma, May 1999
Sources
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5704510, 5704516, 5704511, 5704515, 5704512, 5704497, 5704498, 5704499, 5704514, 5704500, 5704501, 5704502, 5704503, 5704504, 5704513, 5704505, 5704508, 5704506, 5704507, 5704509.