Weiser River at Weiser

1. 13.00 ftMajor flooding will occur in Weiser and Midvale. Highway 95 will be inundated in several sections especially in the stretch just south of Weiser. Flooding of houses and other buildings near Weiser is likely with water several feet deep spreading north of the river towards Commercial Street. Water may begin flowing over the bridge on Cove Road. Flooding of Old Highway Road in Midvale is likely.
2. 12.50 ftWater will begin flowing over Highway 95 just south of Weiser with a depth around a half foot. Flooding will spread north of the river in Weiser towards Commercial Street. Water will be about 3 feet deep between the river and Couper Road with flooding of houses and buildings likely south of the river. Flooding of county roads near Midvale will continue.
3. 12.00 ftSignificant flooding can be expected in Weiser and Midvale with flood waters beginning to cross Highway 95 south of Weiser. Extensive flooding south and east of Weiser will occur with water covering Cove Road and Couper Road to a depth of 2.5 feet. Flooding will also spread north of the river towards Washington Street in Weiser. The river will overflow its banks near Midvale with water beginning to cover county roads near the river.
4. 11.00 ftFlood water will begin spilling over the levees near the Cove Road bridge flooding portions of Cove Road and Couper Road near Weiser. County roads near the river upstream from Weiser will begin to flood.
5. 10.30 ftFloodwaters will approach the Cove Road bridge over the Weiser River making it unsafe to cross.
6. 9.50 ftMinor flooding of fields and agricultural land near Weiser is possible. Water will begin backing up under the Cove Road bridge into the slough and adjacent farmland.

Chance of flooding, September to November

The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 22, 2026.

Most recent crests

• March 4, 2025: 9.54 ft
• April 5, 2024: 8.23 ft
• March 15, 2023: 9.64 ft
• June 6, 2022: 6.84 ft
• March 20, 2021: 9.31 ft
• January 29, 2020: 7.30 ft
• April 9, 2019: 12.90 ft
• March 23, 2018: 8.06 ft
• February 10, 2017: 12.00 ft
• March 11, 2014: 11.74 ft

• UpstreamWeiser River at Cambridge
• Crane Creek at Weiser
• Southwest Idaho Reservoirs at Mann Creek Reservoir
• Snake River at Weiser
• Payette River at Payette
• Malheur River at Ontario
• Pine Creek (West-central Idaho) at Cambridge
• Little Weiser River at Indian Valley

Forecasts by the Northwest River Forecast Center. Forecasts are issued routinely year-round. Stage may be affected by ice.

Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.