Hail, Big Horn
- When
- May 21, 2:30 PM MST
- Where
- Big Horn County, 15 mi E of Hardin
- Measured
- 1 in hail
- Coordinates
- 45.730, -107.280
Hail and Heavy Rain in Montana, May 21, 1998
Thunderstorms produced one to two inches of rain in one to two hours across portions of South Central and southeastern Montana. One storm produced large hail as it moved north across Northern Big Horn and Southern Treasure counties.
Where it happened
Every event with a place to put it; 3 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
- 5
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 BYZ wrote it up.
Thunderstorms produced one to two inches of rain in one to two hours across portions of South Central and southeastern Montana. One storm produced large hail as it moved north across Northern Big Horn and Southern Treasure counties.
The radar
The national radar mosaic for the moment the first event began.
Event by event
3 heavy rain, 2 hail. Local standard time, as filed.
Heavy Rain, Treasure
- When
- May 21, 2:30 PM MST to 5:00 PM MST
- Where
- Treasure County, Countywide
- Coordinates
- 46.212, -107.272 (the zone’s center; the record gives no point)
Hail, Treasure
- When
- May 21, 2:35 PM MST
- Where
- Treasure County, 25 mi SSE of Hysham
- Measured
- 0.75 in hail
- Coordinates
- 45.970, -107.030
Heavy Rain, Yellowstone
- When
- May 21, 3:45 PM MST to 6:00 PM MST
- Where
- Yellowstone County, Countywide
- Coordinates
- 45.937, -108.274 (the zone’s center; the record gives no point)
Heavy Rain, Musselshell
- When
- May 21, 5:00 PM MST to 7:30 PM MST
- Where
- Musselshell County, Countywide
- Coordinates
- 46.497, -108.398 (the zone’s center; the record gives no point)
What these are
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- Heavy Rain
- Rainfall totals unusual for the place and season that did not produce a flood.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornadoes and Hail in Nebraska, May 21, 1998
- Tornado and Hail in Iowa, May 21, 1998
- Hail and Heavy Rain in Nebraska, May 21, 1998
- Tornado and Hail in Nebraska, May 21, 1998
- Tornado in Nebraska, May 21, 1998
- Flash Flood and Hail in Tennessee, May 21, 1998
- Tornadoes and Hail in Utah, May 21, 1998
- Hail and Damaging Winds in Tennessee, May 21, 1998
- Tornado in Nebraska, May 21, 1998
- Tornado in Missouri, May 21, 1998
- Damaging Wind in Illinois, May 21, 1998
- Damaging Wind in Nebraska, May 21, 1998
More
Every storm in Montana in 1998Every state in 1998This day in weather historyWarnings in Montana, May 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: 5643248, 5643250, 5643249, 5643251, 5643252.