Boyer River at Logan, IA
River level and flood forecast · Harrison County
Normal4.6 ftas of Mon 2 PM
The river is 16.4 ft below flood stage (21 ft).
Flow: 494 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 | 25 ft |
| Moderate flood stage | 22 ft |
| Flood stage | 21 ft |
| Action stage | 19 ft |
| Record crest (March 13, 2019) | 25.33 ft |
What floods at each level
From the National Weather Service, highest first.
- 25 ftWidespread flooding is occurring in areas upstream and downstream of Logan, likely impacting portions of Woodbine and Missouri Valley. Logan itself is largely unaffected except for areas right along the river from 6th Avenue down through 11th Street. Also at this level the railroad bridge east of town begins to be impacted.
- 22 ftHighway 30 will flood in a few low spots between Missouri Valley and Logan.
- 21 ftThe ballfields north of town are flooded.
- 20.5 ftBuildings along the west bank of the river, south of 8th street but west of the railroad tracks, begin to flood.
- 19 ftThere is considerable overbank flooding upstream of Logan with downstream overbank flooding also occurring but less substantial. Floodwater may begin to encroach on the ballfields north of town may begin to be impacted.
Highest crests on record
- 25.33 ft — March 13, 2019
- 25.22 ft — March 1, 1965
- 24.75 ft — June 8, 2008
- 23.87 ft — July 17, 1996
- 23.02 ft — June 21, 1996
Recent crests: 12.2 ft (August 9, 2025) · 12.66 ft (May 21, 2024) · 16.5 ft (February 15, 2023) · 6.12 ft (July 8, 2022) · 6.45 ft (July 11, 2021)
Up and down the river, and nearby
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (LGNI4); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.