Upper Iowa River at Dorchester, IA
River level and flood forecast · Allamakee County
Normal7.6 ftas of Mon 2 PM
The river is 6.4 ft below flood stage (14 ft).
Flow: 725 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Mon, Sep 21, 8:23 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 19 ft |
| Moderate flood stage | 17 ft |
| Flood stage | 14 ft |
| Action stage | 11 ft |
| Record crest (August 25, 2016) | 24.3 ft |
What floods at each level
From the National Weather Service, highest first.
- 24 ftIowa Highway 76 is overtopped just north of the gage site.
- 22 ftIowa Highway 76 south of Dorchester may be threatened by flood waters.
- 15 ftSignificant agricultural flooding begins.
- 14 ftLowland agricultural areas begin to flood.
Highest crests on record
- 24.3 ft — August 25, 2016
- 22.46 ft — June 9, 2008
- 22.2 ft — February 28, 1948
- 21.8 ft — May 30, 1941
- 20.89 ft — March 5, 1937
Recent crests: 14.05 ft (July 11, 2026) · 16.89 ft (August 19, 2025) · 14.97 ft (June 25, 2024) · 12.03 ft (February 27, 2023) · 14.67 ft (July 24, 2022)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (DCHI4); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.