Blackwater River near Valley City, MO
River level and flood forecast · Johnson County
Normal2.2 ftas of Mon 3 PM
The river is 19.8 ft below flood stage (22 ft).
Flow: 5 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Sun, Dec 31, 6 PM. Forecasts change as rain falls and as upstream water arrives.
Flood stages
| Major flood stage | 31 ft |
| Moderate flood stage | 25 ft |
| Flood stage | 22 ft |
| Action stage | 17 ft |
| Record crest (August 1, 2020) | 34.31 ft |
What floods at each level
From the National Weather Service, highest first.
- 31 ftExtensive flooding of rural property and many roads occurs.
- 25 ftCounty Highway E near Valley City and Highway 23 near the Perry State Wildlife Area are under water.
- 22 ftWoodlands and farm fields along the river begin to flood.
Highest crests on record
- 34.31 ft — August 1, 2020
- 33.83 ft — August 7, 2017
- 33.62 ft — April 3, 2014
- 33.16 ft — April 29, 2024
- 32.91 ft — April 30, 2017
Recent crests: 27.49 ft (May 20, 2026) · 29.17 ft (April 28, 2026) · 23.96 ft (April 18, 2026) · 23.16 ft (April 10, 2026) · 30.41 ft (April 3, 2026)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (VLYM7); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.