Flood, Harrison
- When
- April 2, 12:00 PM CST to April 30, 11:59 PM CST
- Where
- Harrison forecast zone
- Coordinates
- 41.683, -95.817 (the zone’s center; the record gives no point)
Flood in Iowa, April 2 to 30, 1997
Flooding along the Missouri River was the result of snowmelt runoff from the James, Vermillion, Big and Little Sioux, and Floyd rivers in South Dakota and northwest Iowa. In addition, record high releases from Gavins Point Dam added to the flooding.
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 OAX wrote it up.
Flooding along the Missouri River was the result of snowmelt runoff from the James, Vermillion, Big and Little Sioux, and Floyd rivers in South Dakota and northwest Iowa. In addition, record high releases from Gavins Point Dam added to the flooding. Lowland flooding of agricultural bottomlands, boat marinas, and some local parks was common from along the river west of Missouri Valley to points further south.
The radar
The national radar mosaic for the moment the first event began.
Event by event
1 flood. Local standard time, as filed.
What these are
- Flood
- Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- High Wind in Utah, April 2, 1997
- Flood in North Dakota, April 2 to 5, 1997
- Flash Flooding and Hail in Texas, April 2, 1997
- High Wind in New Mexico, April 2 to 3, 1997
- Flash Flood in Texas, April 2, 1997
- Flash Flood in Texas, April 2, 1997
- High Wind in California, April 2, 1997
- High Wind in Arizona, April 2 to 3, 1997
- Flash Flooding in Texas, April 2 to 3, 1997
- Flash Flood in Texas, April 2, 1997
- High Wind in California, April 2, 1997
- Damaging Wind in Texas, April 2, 1997
More
Every storm in Iowa in 1997Every state in 1997This day in weather historyWarnings in Iowa, April 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: 5594767.