Flash Flood, Grand
- When
- July 30, 3:30 PM MST to 5:30 PM MST
- Where
- Grand County, 5 mi N of Thompson
- Property damage
- $2,000
- Reported by
- BROADCAST MEDIA
- Coordinates
- 38.982, -109.570 (the zone’s center; the record gives no point)
Flash Flood in Utah, July 30, 1999
A flash flood occurred in Sego Canyon, trapping a television news crew near the ghost town of Sego. The news crew videotaped the flash flood and reported a 6 foot wall of water and debris which came down the canyon, washing out a section of road.
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
- $2,000
- 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 GJT wrote it up.
A flash flood occurred in Sego Canyon, trapping a television news crew near the ghost town of Sego. The news crew videotaped the flash flood and reported a 6 foot wall of water and debris which came down the canyon, washing out a section of road.
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
- Damaging Winds and Lightning Strike in Wisconsin, July 30 to 31, 1999
- Hail and Damaging Winds in Ohio, July 30 to 31, 1999
- Heat in Alabama, July 30, 1999
- Heat in Arkansas, July 30, 1999
- Lightning Strike in Wisconsin, July 30, 1999
- Heat in Arkansas, July 30, 1999
- Damaging Wind in Wisconsin, July 30, 1999
- Flood and Hail in Iowa, July 30 to 31, 1999
- Flash Flood in Guam, July 30, 1999
- Tornadoes and Hail in Minnesota, July 30, 1999
- Hail and Damaging Winds in New York, July 30, 1999
- Damaging Winds in Kansas, July 30, 1999
More
Every storm in Utah in 1999Every state in 1999This day in weather historyWarnings in Utah, 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: 5715318.