Flash Flood, Sioux
- When
- July 20, 5:20 AM CST
- Where
- Sioux County, Sioux Center
- Reported by
- LAW ENFORCEMENT
- Coordinates
- 43.083, -96.178 (the zone’s center; the record gives no point)
Flash Flood in Iowa, July 20, 1999
Heavy rain caused flooding of creeks in the area. There was no estimate of damage.
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 FSD wrote it up.
Heavy rain caused flooding of creeks in the area. There was no estimate of damage.
The radar
The Sioux Falls radar (KFSD), 72 km away, was scanning. The volume nearest the first event began at 11:20 UTC.
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
- Heat in Ohio, July 20 to 31, 1999
- Heat in Illinois, July 20 to 26, 1999
- Heat in Georgia, July 20 to 31, 1999
- Heat in North Carolina, July 20 to 31, 1999
- Drought in Iowa, July 20 to 30, 1999
- Heat in Kentucky, July 20 to 31, 1999
- Heat in South Carolina, July 20 to 31, 1999
- Flash Flooding in Iowa, July 20, 1999
- Flooding and Hail in Wisconsin, July 20, 1999
- Tornadoes and Hail in Iowa, July 20, 1999
- Flash Flooding and Damaging Wind in Iowa, July 20 to 21, 1999
- Flash Flooding in Minnesota, July 20, 1999
More
Every storm in Iowa in 1999Every state in 1999This day in weather historyWarnings in Iowa, 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: 5712288.