1 flood, as filed by the National Weather Service.
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.
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.
The national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
Heavy rain on 5/20/99 which moved from southeast Nebraska into southwest Iowa caused the Nishnabotna river in southwest Iowa to flood around Hamburg. The river at Hamburg reached 26.14 feet at 115 pm on 5/21/99, flood stage is 23 feet.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 1999Every state in 1999This day in weather historyWarnings in Iowa, May 1999
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: 5697271.