Skip Navigation Link weather.gov  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left Home News Organization
Navigation Bar End Cap

  

National Conditions
    Rivers
    Satellite
    Climate
    Observed Precip

Local Conditions
    Warnings
    Weather Forecast
    Area Radar
    Spokane Radar

AHPS Documentation
    User Guide
    User Brochure

What is AHPS?
    Facts
    Our Partners

Feedback/Questions
    Provide Feedback
    Ask Questions

When flooded turn around don't drown
FloodSmart
USA.gov Official Web Portal
 

This probabilistic forecast is issued by the Northwest River Forecast Center.
tab left off Hydrograph tab right off tab left off River at a Glance tab right off tab left off Download tab right off tab left on tab right on
About this graph
Forecasts for the Okanogan River at Oroville are issued routinely year-round.
Return to Area Map

Downstream Gauge Downstream Gauge - near Tonasket
Zoom Level:13
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 0
Action Stage: 0
Low Stage (in feet): 5

Historic Crests
(1) 16.89 ft on 06/02/1972
(2) 16.50 ft on 05/31/1948
(3) 16.08 ft on 05/13/2018
(4) 15.50 ft on 06/18/1974
(5) 14.90 ft on 06/18/1950
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 11.44 ft on 05/07/2023 (P)
(2) 11.28 ft on 06/14/2022
(3) 13.40 ft on 11/16/2021
(4) 10.46 ft on 05/18/2021
(5) 13.24 ft on 06/01/2020
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 4.90 ft on 05/29/1948
(2) 5.60 ft on 09/01/2021
Show More Low Water Records
KML Image
Gauge LocationGauge Map Marker
 Disclaimer
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.
Low Water Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
300 cfs Minimum base flow for August 15, and September 1st & 15th at this river gage, which is the lowest base flow of the year. The affected stream reach is from the confluence of the Similkameen River to Osoyoos Lake. Water-rights junior to the base flows established in the rule may be restricted if streamflow drops below this value. For more information on this and the minimum base flows for other times in the year and for other reaches, refer to Washington Administrative Code (WAC) Chapter 173-549.

Other Real-time and/or Archive Data Sources:
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
National Weather Service
Spokane Weather Forecast Office
2601 N. Rambo Rd.
Spokane, WA 99224
(509) 244-0110
Ask Questions/Webmaster
Page last modified: 2-Nov-2020 7:27 PM 		Disclaimer
Credits
Glossary 		Privacy Policy
About Us
Career Opportunities