Flash Flood, Powell
- When
- July 3, 5:00 PM MST to 6:00 PM MST
- Where
- Powell County, Central Portion
- Coordinates
- 46.857, -112.936 (the zone’s center; the record gives no point)
Flash Flood in Montana, July 3, 1998
Thunderstorms caused 10 to 15 feet of water to wash out mainly dirt roads between Nevada Lake and Avon, with damage to Montana Highway 141.
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
- 1
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 MSO wrote it up.
Thunderstorms caused 10 to 15 feet of water to wash out mainly dirt roads between Nevada Lake and Avon, with damage to Montana Highway 141.
The radar
The national radar mosaic for the moment the first event began.
Event by event
1 flash flood. Local standard time, as filed.
What these are
- 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.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Flash Flood in Alabama, July 3, 1998
- Heat in Texas, July 3, 1998
- Flash Flooding and Wildfire in Washington, July 3 to 31, 1998
- Hail and Damaging Winds in Georgia, July 3 to 19, 1998
- Flash Flooding in Montana, July 3, 1998
- Tornado in Montana, July 3, 1998
- Tornado and Flash Flooding in Indiana, July 3 to 4, 1998
- Flash Flooding in Texas, July 3 to 4, 1998
- Damaging Wind in Florida, July 3, 1998
- Damaging Winds in Florida, July 3, 1998
- Lightning Strike in Kentucky, July 3, 1998
- Hail and Damaging Winds in Missouri, July 3, 1998
More
Every storm in Montana in 1998Every state in 1998This day in weather historyWarnings in Montana, July 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: 5651176.