Flood, Black Hawk
- When
- July 28, 1:00 AM CST to July 30, 12:00 PM CST
- Where
- Black Hawk forecast zone
- Property damage
- $25,000
- Crop damage
- $10,000
- Reported by
- OFFICIAL NWS OBS.
- Coordinates
- 42.470, -92.309 (the zone’s center; the record gives no point)
Flooding in Iowa, July 28 to 30, 1999
Another round of significant rainfall fell over parts of northeast Iowa during the overnight and early morning hours of July 27 and 28. Radar indicated rainfall of 2 to 3 inches from just north of Waterloo to south of Mason City.
Where it happened
Every event with a place to put it; 2 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
- $50,000
- Crop damage
- $20,000
- Events
- 2
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 DMX wrote it up.
Another round of significant rainfall fell over parts of northeast Iowa during the overnight and early morning hours of July 27 and 28. Radar indicated rainfall of 2 to 3 inches from just north of Waterloo to south of Mason City. The bulk of the rains fell in the Beaver Creek and West Fork Cedar River basins. Initial forecasts called for significant flooding near Finchford on the West Fork Cedar River, however these conditions failed to develop as seriously as expected. There was minor flooding along parts of Beaver Creek in Butler and Black Hawk Counties.
The radar
The national radar mosaic for the moment the first event began.
Event by event
2 flood. Local standard time, as filed.
Flood, Butler
- When
- July 28, 1:00 AM CST to July 30, 12:00 PM CST
- Where
- Butler forecast zone
- Property damage
- $25,000
- Crop damage
- $10,000
- Reported by
- OFFICIAL NWS OBS.
- Coordinates
- 42.732, -92.790 (the zone’s center; the record gives no point)
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
- Heat in Illinois, July 28 to 31, 1999
- Tornadoes and Flash Flood in Ohio, July 28, 1999
- Heat in Illinois, July 28 to 31, 1999
- Damaging Winds in Virginia, July 28, 1999
- Heat in Wisconsin, July 28 to 30, 1999
- Heat in Minnesota, July 28 to 30, 1999
- Heat in Nebraska, July 28 to 29, 1999
- Heat in Arkansas, July 28, 1999
- Flash Flooding and Hail in Pennsylvania, July 28, 1999
- Tornado and Hail in Michigan, July 28, 1999
- Heat in Iowa, July 28 to 29, 1999
- Flash Flood and Damaging Wind in Arizona, July 28, 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 2026-10-01. Each event’s entry at NCEI: 5706146, 5706147.