Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

Experimental National Water Center Products: The National Hydrologic Discussion, Area Hydrologic Discussion, and Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via https://www.weather.gov/owp/operations, as described in the StoryMap here.

Weather Forecast Office Spokane, WA

Northwest River Forecast Center

Hydrograph

River at a Glance

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Printable Image About this graph Tabular Data (UTC) Tabular Data (PDT) Datum: NGVD29 Metadata

NOTE: Forecasts are not available for the Bonaparte Creek at Tonasket. Only observed stages are available for this point.

Default Hydrograph Scale to Flood Categories   Return to Area Map

Flood Categories (in feet) Major Flood Stage: 0 Moderate Flood Stage: 0 Flood Stage: 0 Action Stage: 0 Low Stage (in feet): 0 Historic Crests (1) 2.95 ft on 05/17/2017 (2) 2.43 ft on 02/08/2019 (3) 2.42 ft on 05/11/2018 (4) 2.20 ft on 06/20/2022 (P) (5) 2.16 ft on 04/25/2016 Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 2.20 ft on 06/20/2022 (P) (2) 2.13 ft on 01/25/2021 (3) 1.82 ft on 06/15/2020 (4) 2.43 ft on 02/08/2019 (5) 2.42 ft on 05/11/2018 Show More Recent Crests (P): Preliminary values subject to further review. Low Water Records (1) 0.00 ft on 08/16/2016 (2) 1.00 ft on 08/12/2021

Zoom Level:16 Legend FEMA Layer Gauge Location 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.

About This Location

Latitude: 48.701200° N, Longitude: 119.442800° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft Not Available Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps Vertical Datum Elevation (gauge height = 0) Elevation (gauge height = flood stage) Elevation information source NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps NGVD 29 920 ft Not Available Older USGS topographic maps, NGVD29 benchmarks MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks Other Not Available Not Available   Current/Historical Observations: U.S. Geological Survey (USGS) Data and Site Info for Tonasket

Additional Information

This gage is located downstream recent wildfire activity. Rapid rises are possible during times of intense precipitation.

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary Inundation Mapping Locations Pacific Northwest Water Supply Forecasts U.S. Bureau of Reclamation Hydromet Program - Pacific Northwest Washington State Dept of Ecology River & Streamflow Monitoring Network

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management Weather Forecast Office Spokane, Washington Northwest U.S. River Flood Outlook Snow Information National Flood Insurance Program USGS Idaho Water Science Center USGS Washington Water Science Center U.S. Army Corps of Engineers - Seattle District Natural Resources Conservation Service - Water & Climate Center U.S. Drought Portal Idaho Department of Water Resources International Joint Commission Available Water Temperatures - Updated Daily Washington State Digital Flood Hazard Map - Dept of Ecology Idaho Dept of Water Resources - Flood Hazard Maps

Collaborative Agencies 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