Hail, Campbell
- When
- July 7, 3:45 PM MST
- Where
- Campbell County, 8 mi SE of Gillette
- Measured
- 0.75 in hail
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 44.200, -105.370
Tornado and Hail in Wyoming, July 7 to 22, 1999
9 hail, 3 thunderstorm wind, 1 tornado, 1 lightning, as filed by the National Weather Service.
Where it happened
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. 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
- None recorded
- Crop damage
- None recorded
- Events
- 14
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.
The radar
The Rapid City radar (KUDX), 203 km away, was scanning. The volume nearest the first event began at 22:44 UTC.
Event by event
9 hail, 3 thunderstorm wind, 1 tornado, 1 lightning. Local standard time, as filed.
Thunderstorm Wind, Crook
- When
- July 7, 4:35 PM MST
- Where
- Crook County, 25 mi NW of Hulett
- Measured
- 52 kt (60 mph)
- Reported by
- TRAINED SPOTTER
- Coordinates
- 44.930, -104.970
Hail, Crook
- When
- July 7, 5:00 PM MST
- Where
- Crook County, 21 mi N of Hulett
- Measured
- 1 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 44.980, -104.600
Hail, Weston
- When
- July 15, 3:15 PM MST
- Where
- Weston County, 10 mi W of Upton
- Measured
- 0.75 in hail
- Reported by
- GENERAL PUBLIC
- Coordinates
- 44.100, -104.830
Hail, Campbell
- When
- July 15, 3:25 PM MST
- Where
- Campbell County, 20 mi SE of Gillette
- Measured
- 1 in hail
- Reported by
- UNKNOWN
- Coordinates
- 44.080, -105.200
Hail, Weston
- When
- July 15, 4:15 PM MST
- Where
- Weston County, 6 mi N of Upton
- Measured
- 1 in hail
- Reported by
- GENERAL PUBLIC
- Coordinates
- 44.180, -104.630
Hail was one foot deep along the Crook and Weston county line.
Hail, Crook
- When
- July 15, 4:15 PM MST
- Where
- Crook County, 14 mi SW of Sundance
- Measured
- 1 in hail
- Reported by
- GENERAL PUBLIC
- Coordinates
- 44.250, -104.580
Thunderstorm Wind, Weston
- When
- July 15, 4:40 PM MST
- Where
- Weston County, 15 mi W of Four Corners
- Measured
- 52 kt (60 mph)
- Reported by
- GENERAL PUBLIC
- Coordinates
- 44.070, -104.430
Hail, Crook
- When
- July 15, 5:15 PM MST
- Where
- Crook County, Devils Tower
- Measured
- 0.88 in hail
- Reported by
- PARK/FOREST SERVICE
- Coordinates
- 44.580, -104.700
Tornado, Weston
- When
- July 17, 2:24 PM MST
- Where
- Weston County, 5 mi SW of Newcastle
- Rating
- F0
- Path length
- 0.1 mi
- Path width
- 10 yd
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 43.800, -104.280
Brief touchdown. Path width and length estimated.
Hail, Weston
- When
- July 20, 7:07 PM MST
- Where
- Weston County, 4 mi SW of Upton
- Measured
- 0.75 in hail
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 44.070, -104.680
Hail, Weston
- When
- July 20, 8:00 PM MST
- Where
- Weston County, 16 mi SW of Upton
- Measured
- 0.75 in hail
- Reported by
- GENERAL PUBLIC
- Coordinates
- 43.930, -104.870
Lightning, Campbell
- When
- July 21, 5:00 PM MST to July 22, 5:00 PM MST
- Where
- Campbell County, Countywide
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 44.248, -105.548 (the zone’s center; the record gives no point)
11 fires were started throughout the county due to lightning striking rangeland and hay bales. The largest fire reached 300 acres before firefighters were able to contain it.
Thunderstorm Wind, Campbell
- When
- July 21, 5:15 PM MST
- Where
- Campbell County, Echeta
- Measured
- 66 kt (76 mph)
- Reported by
- AWOS,ASOS,MESONET,ETC
- Coordinates
- 44.430, -105.850
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- 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.
- 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.
- Lightning
- A lightning strike that killed, injured or caused damage.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Damaging Winds in Arizona, July 7, 1999
- Lightning Strike in South Carolina, July 7, 1999
- Flood and Hail in North Carolina, July 7, 1999
- Flash Flood and Damaging Winds in North Carolina, July 7, 1999
- Damaging Wind in Alabama, July 7, 1999
- Hail and Damaging Winds in Virginia, July 7, 1999
- Hail and Damaging Winds in Virginia, July 7, 1999
- Hail and Damaging Wind in Vermont, July 7, 1999
- Damaging Wind in Tennessee, July 7, 1999
- Damaging Winds in New York, July 7, 1999
- Damaging Winds in Georgia, July 7, 1999
- Damaging Wind in Alabama, July 7, 1999
More
Every storm in Wyoming in 1999Every state in 1999This day in weather historyThe tornado archive for Wyoming, 1999Warnings in Wyoming, July 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: 5712749, 5712750, 5712751, 5712753, 5712752, 5712754, 5712756, 5712755, 5712757, 5712848, 5712849, 5712850, 5712852, 5712851.