Flash Flood, Cassia
- When
- July 29, 1:30 PM MST to 2:00 PM MST
- Where
- Cassia County, 22 mi SE of Malta
- Deaths
- 1 direct, 0 indirect
- Injuries
- 1 direct, 0 indirect
- Coordinates
- 42.284, -113.600 (the zone’s center; the record gives no point)
Flash Flood in Idaho, July 29, 1996
Heavy rain produced flash flooding with water 3 to 4 feet deep across the east bound lanes of Interstate 84 near mile marker 261. A driver rounded a corner and drove into the flooded area.
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
- 1
- Injuries
- 1
- 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 PIH wrote it up.
Heavy rain produced flash flooding with water 3 to 4 feet deep across the east bound lanes of Interstate 84 near mile marker 261. A driver rounded a corner and drove into the flooded area. The vehicle was forced off the right side of the highway into deeper water in the roadside ditch. The vehicle rolled and was washed 1100 feet, coming to rest on it's top. Although most of the flood water was channeled primarily into the median, 6 to 12 inches also flooded the west bound lanes. Interstate 84 was closed for at least 30 minutes due to flooding and debris on the highway.
The radar
The Pocatello radar (KSFX), 118 km away, was scanning. The volume nearest the first event began at 20:28 UTC.
Event by event
1 flash flood. Local standard time, as filed.
The people who died
As the offices recorded each death: direct deaths were caused by the weather itself, indirect ones by something it set in motion.
| Event | Date | Age | Sex | Where | Kind |
|---|---|---|---|---|---|
| Flash Flood, Cassia | 1996-07-29 | 82 | Male | Vehicle/Towed Trailer | Direct |
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
- Rip Current in Florida, July 29, 1996
- Flash Flood in Missouri, July 29, 1996
- Lightning Strike in Michigan, July 29, 1996
- Damaging Wind in Kansas, July 29, 1996
- Damaging Wind in Kansas, July 29, 1996
- Damaging Wind in Oklahoma, July 29, 1996
- Damaging Wind in Oklahoma, July 29, 1996
- Hail in Nebraska, July 29, 1996
- Hail in Nebraska, July 29, 1996
- Tornado in North Dakota, July 29, 1996
- Hail in Iowa, July 29, 1996
- Damaging Wind in Ohio, July 29, 1996
More
Every storm in Idaho in 1996Every state in 1996This day in weather historyWarnings in Idaho, July 1996
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: 5568095.