Nishnabotna River above Hamburg, IA
River level and flood forecast · Fremont County
Normal12.9 ftas of Mon 3 PM
The river is 12.1 ft below flood stage (25 ft).
Flow: 3,180 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sat, Oct 3, 5:25 AM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 33 ft |
| Moderate flood stage | 27.5 ft |
| Flood stage | 25 ft |
| Action stage | 23 ft |
| Record crest (June 17, 1998) | 33.18 ft |
What floods at each level
From the National Weather Service, highest first.
- 39 ftWater reaches the bottom of the J64 bridge at the gage site.
- 33 ftThe top of the levee near the bridge in town is overtopped with flood waters. I-29 is closed south of town.
- 27.5 ftState Highway 275 south of the gage may be threatened in several spots.
- 25 ftMore extensive lowland flooding begins as the parking lot near the gauge begins to experience flooding. In addition, some local farm levees may be overtopped with flood waters.
- 23 ftMinor overflows begin within the city limits, however there is no threat to property at this stage.
Highest crests on record
- 33.18 ft — June 17, 1998
- 32.44 ft — May 8, 2007
- 31.07 ft — March 16, 2019
- 30.56 ft — July 25, 1993
- 29.19 ft — June 14, 2008
Recent crests: 24.07 ft (May 22, 2024) · 18.72 ft (February 28, 2023) · 18.09 ft (June 8, 2022) · 13.21 ft (October 25, 2021) · 17.94 ft (May 27, 2020)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (HMBI4); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.