Tornado, Big Horn
- When
- June 13, 6:25 PM MST to 6:27 PM MST
- Where
- Big Horn County, 3 mi S of Basin
- Rating
- F0
- Path length
- 0.1 mi
- Path width
- 30 yd
- Coordinates
- 44.330, -108.050
Tornadoes and Flash Flood in Wyoming, June 13, 1997
Two very brief tornado touchdowns south of Basin. Path lengths and widths estimated.
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
- $91,000
- Crop damage
- None recorded
- Events
- 4
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 RIW wrote it up.
Two very brief tornado touchdowns south of Basin. Path lengths and widths estimated. Extensive flash flooding in Basin.
The radar
The Riverton/Lander radar (KRIW), 145 km away, was scanning. The volume nearest the first event began at 01:22 UTC.
Event by event
2 tornado, 1 flash flood, 1 hail. Local standard time, as filed.
Flash Flood, Big Horn
- When
- June 13, 6:30 PM MST to 7:00 PM MST
- Where
- Big Horn County, Basin
- Property damage
- $91,000
- Coordinates
- 44.527, -107.995 (the zone’s center; the record gives no point)
Tornado, Big Horn
- When
- June 13, 6:35 PM MST to 6:36 PM MST
- Where
- Big Horn County, 1 mi S of Basin
- Rating
- F0
- Path width
- 30 yd
- Coordinates
- 44.370, -108.050
Hail, Big Horn
- When
- June 13, 6:40 PM MST
- Where
- Big Horn County, Basin
- Measured
- 0.75 in hail
- Coordinates
- 44.380, -108.050
What these are
- 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.
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Tornado in Kentucky, June 13, 1997
- Hail and Damaging Winds in Louisiana, June 13, 1997
- Hail and Damaging Winds in Texas, June 13, 1997
- Tornado in Tennessee, June 13, 1997
- Tornadoes and Flash Flood in Colorado, June 13 to 15, 1997
- Hail and Damaging Winds in Texas, June 13, 1997
- Hail and Damaging Winds in Oklahoma, June 13, 1997
- Damaging Wind in Kentucky, June 13, 1997
- Flash Flooding and Hail in Tennessee, June 13 to 14, 1997
- Hail and Damaging Winds in Tennessee, June 13, 1997
- Tornado and Flash Flood in Texas, June 13, 1997
- Flash Flooding and Hail in Texas, June 13, 1997
More
Every storm in Wyoming in 1997Every state in 1997This day in weather historyThe tornado archive for Wyoming, 1997Warnings in Wyoming, June 1997
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: 5603225, 5603226, 5603227, 5603228.