Hail, Musselshell
- When
- August 23, 7:16 PM MST
- Where
- Musselshell County, 10 mi S of Roundup
- Measured
- 1.75 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 46.300, -108.530
Tornadoes and Hail in Montana, August 23, 1998
5 hail, 5 thunderstorm wind, 2 tornado, as filed by the National Weather Service.
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
- $301,000
- Crop damage
- None recorded
- Events
- 12
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 national radar mosaic for the moment the first event began.
Event by event
5 hail, 5 thunderstorm wind, 2 tornado. Local standard time, as filed.
Tornado, Treasure
- When
- August 23, 8:45 PM MST to 9:00 PM MST
- Where
- Treasure County, Bighorn to 9 mi SE of Bighorn
- Rating
- F0
- Path length
- 7 mi
- Path width
- 50 yd
- Property damage
- $100,000
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 46.030, -107.450
Tornado, Treasure
- When
- August 23, 9:00 PM MST to 9:15 PM MST
- Where
- Treasure County, Hysham to 20 mi SE of Hysham
- Rating
- F0
- Path length
- 7 mi
- Path width
- 50 yd
- Property damage
- $200,000
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 46.100, -107.530
Two small tornadoes in Treasure County knocked down several trees, antennas and power poles. One power pole which contained a transformer started some fires after it fell. The tornadoes also damaged some houses and sheds.
Hail, Treasure
- When
- August 23, 9:13 PM MST
- Where
- Treasure County, 12 mi S of Hysham
- Measured
- 0.75 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 46.130, -107.230
Thunderstorm Wind, Yellowstone
- When
- August 23, 9:18 PM MST
- Where
- Yellowstone County, Pompeys Pillar
- Measured
- 61 kt (70 mph)
- Reported by
- TRAINED SPOTTER
- Coordinates
- 46.000, -107.950
Thunderstorm Wind, Rosebud
- When
- August 23, 9:35 PM MST
- Where
- Rosebud County, Colstrip
- Property damage
- $1,000
- Reported by
- GENERAL PUBLIC
- Coordinates
- 45.880, -106.580
Some windows were damaged at a residence.
Hail, Rosebud
- When
- August 23, 9:50 PM MST
- Where
- Rosebud County, 12 mi NW of Colstrip
- Measured
- 0.75 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 46.000, -106.770
Thunderstorm Wind, Rosebud
- When
- August 23, 9:50 PM MST
- Where
- Rosebud County, 12 mi NW of Colstrip
- Measured
- 52 kt (60 mph)
- Reported by
- TRAINED SPOTTER
- Coordinates
- 46.000, -106.770
Thunderstorm Wind, Treasure
- When
- August 23, 10:04 PM MST
- Where
- Treasure County, 5 mi S of Bighorn
- Measured
- 52 kt (60 mph)
- Reported by
- TRAINED SPOTTER
- Coordinates
- 46.100, -107.450
Hail, Rosebud
- When
- August 23, 10:16 PM MST
- Where
- Rosebud County, 15 mi NE of Colstrip
- Measured
- 0.88 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 46.030, -106.370
Thunderstorm Wind, Treasure
- When
- August 23, 10:25 PM MST
- Where
- Treasure County, Hysham
- Measured
- 52 kt (60 mph)
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 46.300, -107.230
A Montana State Highway patrolman reported a 60 mph wind gust in the Hysham Hills area.
Hail, Carter
- When
- August 23, 11:15 PM MST
- Where
- Carter County, 7 mi SE of Ekalaka
- Measured
- 0.75 in hail
- Reported by
- TRAINED SPOTTER
- Coordinates
- 45.820, -104.450
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
- Flash Flooding in Texas, August 23 to 24, 1998
- Flash Flooding in Texas, August 23, 1998
- Flooding in Texas, August 23, 1998
- Tornadoes and Hail in Wisconsin, August 23, 1998
- Rip Current in Florida, August 23, 1998
- Flash Flooding in Texas, August 23, 1998
- Flood in Texas, August 23, 1998
- Hail in Minnesota, August 23, 1998
- Rip Current in Delaware, August 23 to 29, 1998
- Rip Current in Florida, August 23, 1998
- Heat in Missouri, August 23 to 25, 1998
- Rip Currents in New Jersey, August 23 to 29, 1998
More
Every storm in Montana in 1998Every state in 1998This day in weather historyThe tornado archive for Montana, 1998Warnings in Montana, August 1998
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: 5662513, 5662515, 5662514, 5662516, 5662517, 5662589, 5662590, 5662591, 5662592, 5662593, 5662594, 5662595.