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Experimental National Water Center Products: Flood Inundation Mapping services are now available for 10% of the U.S. population. Please visit https://www.weather.gov/owp/operations for more information. The National Hydrologic Discussion, Area Hydrologic Discussion, Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via the URL above, as described in the StoryMap here.

Weather Forecast Office Portland, OR

Northwest River Forecast Center

Beach Hazards Statement

Hydrologic Outlook

Hydrograph

River at a Glance

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Printable Image About this graph Tabular Data (UTC) Tabular Data (PST) Datum: Not Available Metadata

NOTE: Forecasts for the Grays River at Covered Bridge near Rosburg are issued as needed during times of high water, but are not routinely available.

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Flood Categories (in feet) Major Flood Stage: 16 Moderate Flood Stage: 0 Flood Stage: 12 Action Stage: 11 Low Stage (in feet): 0 Historic Crests (1) 16.50 ft on 12/03/2007 (2) 16.16 ft on 01/07/2022 (P) (3) 16.15 ft on 01/07/2009 (4) 16.10 ft on 11/17/2015 (5) 16.03 ft on 11/19/2012 Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 12.08 ft on 11/04/2023 (P) (2) 16.16 ft on 01/07/2022 (P) (3) 15.27 ft on 11/12/2021 (P) (4) 13.17 ft on 12/18/2018 (5) 13.40 ft on 12/29/2017 Show More Recent Crests (P): Preliminary values subject to further review. Low Water Records Currently none available. For more information on your flood risk go to www.floodsmart.gov. Show FEMA's National Flood Hazard Layers FEMA's National Flood Hazard Layers not showing? Why aren't the FEMA National Flood Hazard Layers showing on the ESRI Map? Possible reasons: There are no FEMA National Flood Hazard Layers for the location which you are viewing on ESRI Maps. The FEMA Web Mapping Service (WMS) is down. Note: Your zoom level may have changed. ESRI's zoom levels must be between 14 and 16 to show National Flood Hazard layers.

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.

Flood Impacts & Photos

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16	expect major flooding of lowland areas and roads in the vicinity of Hwy 4 and Rosburg. Numerous road closures are likely. Some buildings in low areas near the river are threatened with flooding above this level.
14	expect widespread lowland flooding and numerous flooded roads near Rosburg and Hwy 4. This includes the roadway approaches to the Altoona Bridge over the Grays River.
12	expect some flooding of roads along and near the Grays River, including roadway approaches to the Altoona Bridge over the Grays, and portions of Covered Bridge Road, Barr-Durrah Road, and Loop Road near Rosburg and Hwy 4.
11	there may be some water in low areas and on some secondary roads in the vicinity of Hwy 4 and Rosburg.
Photos (1) Dec 2007 flooding at Grays River gage location (2) Washington Dept of Ecology river gage

About This Location

Latitude: 46.355000° N, Longitude: 123.581667° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 12 ft 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 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks Other Not Available Not Available

Additional Information

Data is provided courtesy of the Washington Dept. of Ecology. For more information, click here.

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary Text Table Temp & Precip Forecasts 3-Day Detailed Precip Forecast 10-Day Temp & Precip Outlook Lewis Dams - USGS data (scroll down to Lewis basin) Lower Columbia Reservoir and River conditions USACE DataQuery USGS WaterWatch Oregon USGS WaterWatch Washington USGS River Temperatures & Water Quality Oregon USGS River Temperatures & Water Quality Washington Oregon Water Resources Dept - Surface Water Data USGS Oregon river levels USGS Washington river levels

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management Snow Data NRCS SNOTEL data map interface USACE Portland District Reservoirs USBR PacNW Reservoirs Oregon Drought Information National Drought Information

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 Portland Weather Forecast Office 5241 NE 122nd Avenue Portland, OR 97230-1089 (503) 261-9246 Ask Questions/Webmaster Page last modified: 2-Nov-2020 7:27 PM Disclaimer Credits Glossary Privacy Policy About Us Career Opportunities