National Weather Service Advanced Hydrologic Prediction Service

weather.gov

Home

News

Organization

Search by city or zip code. Press enter or select the go button to submit request

National Conditions
    Rivers
    Satellite
    Climate
    Observed Precip

Local Conditions
    Warnings
    Weather Forecast
    Radar

AHPS Documentation
User Guide
User Brochure

What is AHPS?
Facts
Our Partners

Feedback/Questions
Provide Feedback
Ask Questions

Weather Forecast Office Portland, OR

Northwest River Forecast Center

Hydrograph

River at a Glance

Download

Printable Image

About this graph

Tabular Data (UTC)

Tabular Data (PDT)

Datum: NGVD29

Metadata

NOTE: Forecasts for the Siletz River at Siletz are issued routinely year-round.

Return to Area Map

Flood Categories (in feet)

Major Flood Stage:	25
Moderate Flood Stage:	20
Flood Stage:	16
Action Stage:	12
Low Stage (in feet):	-9999

Historic Crests
(1) 31.60 ft on 11/20/1921
(2) 28.62 ft on 11/26/1999
(3) 27.32 ft on 01/28/1965
(4) 26.71 ft on 03/31/1931
(5) 25.76 ft on 01/11/1972
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 16.47 ft on 11/25/2016
(2) 18.96 ft on 12/18/2015
(3) 21.50 ft on 12/07/2015
(4) 20.33 ft on 12/21/2014
(5) 16.79 ft on 11/19/2012
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.00 ft on 09/19/1963

Zoom Level:16

	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

If you notice any errors in the below information, please contact our Webmaster
25	Above 25 ft, expect major flooding, with evacuations of residences and areas along the Siletz between mile post 2.5 and mile post 5 on State Highway 229 near Sunset Landing downstream to Coyote Rock. Stay tuned to local media sources and law enforcement information for details.
20	Above 20 ft, expect widespread flooding downstream. Increased flooding can be expected in the housing development downstream from Mack Landing. Numerous private roads and a trailor park between mile post 2.5 and mile post 5 near Sunset Landing to Coyote Rock are flooded. Flooding may be exacerbated during high tide.
18	Above 18 ft, expect minor flooding of a small housing development near mile post 8 down stream from Mack Landing. Widespread lowland and pasture land flooding also occurs at this level. Flooding may be exacerbated during high tide.
16	Above 16 ft, expect minor lowland flooding and minor flooding of some structures and roads along the Siletz River. Flooding may be exacerbated during high tide.

About This Location

Latitude: 44.715278° N, Longitude: 123.888611° W, Horizontal Datum: NAD83/WGS84

River Stage Reference Frame	Gauge Height	Flood Stage	Uses
NWS stage	0 ft	16 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	102.32 ft	118.32 ft	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 Siletz

Additional Information

Archived/Historical Data at USACE DataQuery
10-day Forecast/Trend, Northwest River Forecast Center

Resources

Hydrologic Resources

Additional Resources

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: 1-Mar-2019 12:32 AM

Disclaimer
Credits
Glossary