Mississippi River below Lock and Dam 5a - Winona, MN
River level and flood forecast · Winona County
Normal645.9 ftas of Mon 3:15 PM
The river is 9.1 ft below flood stage (655 ft).
Forecast to hold near 645.9 ft through Mon, Oct 19, 7 AM.
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 8:49 AM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 661 ft |
| Moderate flood stage | 659 ft |
| Flood stage | 655 ft |
| Action stage | 650 ft |
| Record crest (April 19, 1965) | 663.35 ft |
What floods at each level
From the National Weather Service, highest first.
- 664 ftWater reaches the top of the protective earthen levee.
- 663.35 ftWater levels reach the flood of record.
- 663 ftLock walls go underwater.
- 660 ftLock and dam 5A closes to navigation.
- 651 ftWater begins to impact campsites along river upstream at Merrick State Park.
Highest crests on record
- 663.35 ft — April 19, 1965
- 661.95 ft — April 17, 2001
- 661.6 ft — April 11, 1997
- 661.37 ft — April 19, 1969
- 660.51 ft — April 26, 2023
Recent crests: 657.63 ft (July 2, 2024) · 660.51 ft (April 26, 2023) · 656.55 ft (May 25, 2019) · 658.75 ft (April 3, 2019) · 657 ft (July 2, 2014)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (WIDM5); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.