Snake River at Weiser, ID
River level and flood forecast · Washington County
The river is 8.9 ft below flood stage (12 ft).
Forecast to hold near 3.1 ft through Mon, Oct 19, 6 PM.
Flow: 8,870 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 9:18 AM. Forecasts change as rain falls and as upstream water arrives.
Get flood alerts for this river
An email when the National Weather Service forecasts Snake River at Weiser to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 14.5 ft |
| Moderate flood stage | 13.5 ft |
| Flood stage | 12 ft |
| Action stage | 11.5 ft |
| Record crest (December 20, 1972) | 15.55 ft |
What floods at each level
From the National Weather Service, highest first.
- 15 ftMajor flooding will occur near the river, with extensive flooding of agricultural land in Malheur County, Oregon with several county roads underwater. Significant flooding will also occur in Weiser, Idaho with floodwater covering the water treatment plant on Mortimer Road. Floodwater may also reach the airport south of Weiser.
- 13.5 ftModerate flooding is likely near Weiser with water overtopping Mortimer Road to a depth of two feet. Flooding of the Weiser Water Treatment Plant is possible. Some county roads in Malheur County near the river will have water flowing over them. Moderate flooding of agricultural land will occur near the river in Malheur County.
- 12 ftFlooding of agricultural land near the river is likely in Malheur County, Oregon and in Washington County, Idaho. Mortimer Road in Weiser will be flooded.
Highest crests on record
- 15.55 ft — December 20, 1972
- 15.54 ft — January 14, 1979
- 15 ft — February 17, 1933
- 14.67 ft — April 29, 1952
- 14.47 ft — January 3, 1997
Recent crests: 7.37 ft (February 26, 2025) · 8.3 ft (April 7, 2024) · 7.44 ft (May 3, 2023) · 6.45 ft (June 14, 2022) · 5.52 ft (May 26, 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 (WEII1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.