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This probabilistic forecast is issued by the Northwest River Forecast Center.
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About this graph
Forecasts for the Imnaha River at Imnaha are issued routinely year-round.
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Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 9
Moderate Flood Stage: 7
Flood Stage: 5.5
Action Stage: 5
Low Stage (in feet): 0

Historic Crests
(1) 11.44 ft on 01/01/1997
(2) 7.86 ft on 01/17/1974
(3) 7.61 ft on 04/27/1978
(4) 7.06 ft on 05/28/1948
(5) 7.06 ft on 05/26/1998
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(P): Preliminary values subject to further review.

Recent Crests
(1) 5.63 ft on 04/09/2019
(2) 5.94 ft on 04/27/2012
(3) 6.80 ft on 05/16/2011
(4) 6.07 ft on 06/05/2010
(5) 7.06 ft on 05/26/1998
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) -0.99 ft on 11/22/1931
KML Image
Gauge LocationGauge Map Marker
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
5.5 At 5.5 feet low land areas along the river see minor flooding
Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
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Pendleton, OR 97801
(541) 276-7832
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Page last modified: 5-Mar-2019 11:40 PM
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