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Hydrograph River at a Glance Download
Willamette River at Portland Stage (ft)Observed: 2.39 ft at 1:00PM Jun 26, 2015Observed: 2.81 ft at 2:45PM Jun 26, 2015Observed: 2.77 ft at 3:00PM Jun 26, 2015Observed: 2.32 ft at 4:45PM Jun 26, 2015Observed: 2.27 ft at 5:00PM Jun 26, 2015Observed: 2.12 ft at 5:45PM Jun 26, 2015Observed: 2.06 ft at 6:00PM Jun 26, 2015Observed: 2.01 ft at 6:15PM Jun 26, 2015Observed: 1.94 ft at 6:30PM Jun 26, 2015Observed: 1.61 ft at 7:45PM Jun 26, 2015Observed: 1.58 ft at 8:00PM Jun 26, 2015Observed: 2.17 ft at 11:15PM Jun 26, 2015Observed: 2.48 ft at 11:30PM Jun 26, 2015Observed: 2.8 ft at 11:45PM Jun 26, 2015Observed: 3.13 ft at 12:00AM Jun 27, 2015Observed: 3.48 ft at 12:15AM Jun 27, 2015Observed: 3.77 ft at 12:30AM Jun 27, 2015Observed: 4.12 ft at 12:45AM Jun 27, 2015Observed: 4.34 ft at 1:00AM Jun 27, 2015Observed: 4.86 ft at 2:15AM Jun 27, 2015Observed: 4.87 ft at 2:30AM Jun 27, 2015Observed: 4.84 ft at 2:45AM Jun 27, 2015Observed: 4.72 ft at 3:00AM Jun 27, 2015Observed: 4.1 ft at 4:15AM Jun 27, 2015Observed: 3.98 ft at 4:30AM Jun 27, 2015Observed: 3.55 ft at 5:45AM Jun 27, 2015Observed: 3.46 ft at 6:00AM Jun 27, 2015Observed: 3.07 ft at 7:15AM Jun 27, 2015Observed: 2.98 ft at 7:30AM Jun 27, 2015Observed: 2.03 ft at 10:45AM Jun 27, 2015Observed: 2.01 ft at 11:00AM Jun 27, 2015Observed: 1.99 ft at 12:45PM Jun 27, 2015Observed: 2.13 ft at 1:00PM Jun 27, 2015Observed: 2.2 ft at 1:15PM Jun 27, 2015Observed: 2.36 ft at 1:30PM Jun 27, 2015Observed: 2.55 ft at 1:45PM Jun 27, 2015Observed: 2.69 ft at 2:00PM Jun 27, 2015Observed: 3.28 ft at 3:15PM Jun 27, 2015Observed: 3.29 ft at 3:30PM Jun 27, 2015Observed: 3.28 ft at 3:45PM Jun 27, 2015Observed: 3.23 ft at 4:00PM Jun 27, 2015Observed: 1.96 ft at 9:15PM Jun 27, 2015Observed: 1.91 ft at 9:30PM Jun 27, 2015Observed: 1.85 ft at 10:15PM Jun 27, 2015Observed: 1.85 ft at 10:30PM Jun 27, 2015Observed: 1.88 ft at 10:45PM Jun 27, 2015Observed: 1.91 ft at 11:00PM Jun 27, 2015Observed: 3.5 ft at 12:45AM Jun 28, 2015Observed: 3.88 ft at 1:00AM Jun 28, 2015Observed: 5.34 ft at 2:15AM Jun 28, 2015Observed: 5.45 ft at 2:30AM Jun 28, 2015Observed: 4.58 ft at 5:15AM Jun 28, 2015Observed: 4.47 ft at 5:30AM Jun 28, 2015Observed: 4.38 ft at 5:45AM Jun 28, 2015Observed: 4.29 ft at 6:00AM Jun 28, 2015Observed: 2.88 ft at 10:15AM Jun 28, 2015Observed: 2.76 ft at 10:30AM Jun 28, 2015Observed: 2.7 ft at 10:45AM Jun 28, 2015Observed: 2.64 ft at 11:00AM Jun 28, 2015Observed: 2.42 ft at 11:45AM Jun 28, 2015Observed: 2.35 ft at 12:00PM Jun 28, 2015Observed: 2.36 ft at 1:45PM Jun 28, 2015Observed: 2.46 ft at 2:00PM Jun 28, 2015Observed: 2.56 ft at 2:15PM Jun 28, 2015Observed: 2.7 ft at 2:30PM Jun 28, 2015Observed: 2.84 ft at 2:45PM Jun 28, 2015Observed: 3.01 ft at 3:00PM Jun 28, 2015Observed: 3.73 ft at 4:15PM Jun 28, 2015Observed: 3.8 ft at 4:30PM Jun 28, 2015Observed: 3.88 ft at 4:45PM Jun 28, 2015Observed: 3.9 ft at 5:00PM Jun 28, 2015Observed: 3.68 ft at 5:45PM Jun 28, 2015Observed: 3.59 ft at 6:00PM Jun 28, 2015Observed: 3.1 ft at 7:15PM Jun 28, 2015Observed: 3.08 ft at 7:30PM Jun 28, 2015Observed: 3.04 ft at 7:45PM Jun 28, 2015Observed: 2.98 ft at 8:00PM Jun 28, 2015Observed: 2.93 ft at 8:15PM Jun 28, 2015Observed: 2.86 ft at 8:30PM Jun 28, 2015Observed: 2.81 ft at 8:45PM Jun 28, 2015Observed: 2.74 ft at 9:00PM Jun 28, 2015Observed: 2.35 ft at 10:15PM Jun 28, 2015Observed: 2.32 ft at 10:30PM Jun 28, 2015Observed: 2.24 ft at 11:15PM Jun 28, 2015Observed: 2.24 ft at 11:30PM Jun 28, 2015Observed: 2.28 ft at 11:45PM Jun 28, 2015Observed: 2.35 ft at 12:00AM Jun 29, 2015Observed: 3.47 ft at 1:15AM Jun 29, 2015Observed: 3.85 ft at 1:30AM Jun 29, 2015Observed: 4.24 ft at 1:45AM Jun 29, 2015Observed: 4.62 ft at 2:00AM Jun 29, 2015Observed: 4.98 ft at 2:15AM Jun 29, 2015Observed: 5.28 ft at 2:30AM Jun 29, 2015Observed: 5.86 ft at 3:15AM Jun 29, 2015Observed: 5.93 ft at 3:30AM Jun 29, 2015Observed: 5.84 ft at 4:15AM Jun 29, 2015Observed: 5.73 ft at 4:30AM Jun 29, 2015Observed: 5.6 ft at 4:45AM Jun 29, 2015Observed: 5.44 ft at 5:00AM Jun 29, 2015Observed: 5.28 ft at 5:15AM Jun 29, 2015Observed: 5.13 ft at 5:30AM Jun 29, 2015Observed: 4.98 ft at 5:45AM Jun 29, 2015Observed: 4.83 ft at 6:00AM Jun 29, 2015Observed: 4.48 ft at 6:45AM Jun 29, 2015Observed: 4.4 ft at 7:00AM Jun 29, 2015Observed: 4.32 ft at 7:15AM Jun 29, 2015Observed: 4.24 ft at 7:30AM Jun 29, 2015Observed: 4.01 ft at 8:15AM Jun 29, 2015Observed: 3.92 ft at 8:30AM Jun 29, 2015Observed: 3.24 ft at 10:15AM Jun 29, 2015Observed: 3.16 ft at 10:30AM Jun 29, 2015Observed: 3.07 ft at 10:45AM Jun 29, 2015Observed: 2.99 ft at 11:00AM Jun 29, 2015Observed: 2.57 ft at 12:15PM Jun 29, 2015Observed: 2.51 ft at 12:30PM Jun 29, 2015Observed: 2.44 ft at 12:45PM Jun 29, 2015Observed: 2.39 ft at 1:00PM Jun 29, 2015Observed: 2.35 ft at 1:15PM Jun 29, 2015Observed: 2.33 ft at 1:30PM Jun 29, 2015Observed: 2.43 ft at 2:15PM Jun 29, 2015Observed: 2.52 ft at 2:30PM Jun 29, 2015Observed: 2.65 ft at 2:45PM Jun 29, 2015Observed: 2.82 ft at 3:00PM Jun 29, 2015Observed: 3.9 ft at 4:15PM Jun 29, 2015Observed: 4.1 ft at 4:30PM Jun 29, 2015Observed: 4.43 ft at 5:15PM Jun 29, 2015Observed: 4.42 ft at 5:30PM Jun 29, 2015Observed: 4.37 ft at 5:45PM Jun 29, 2015Observed: 4.28 ft at 6:00PM Jun 29, 2015Observed: 4.15 ft at 6:15PM Jun 29, 2015Observed: 4.02 ft at 6:30PM Jun 29, 2015Observed: 3.89 ft at 6:45PM Jun 29, 2015Observed: 3.79 ft at 7:00PM Jun 29, 2015Observed: 3.71 ft at 7:15PM Jun 29, 2015Observed: 3.64 ft at 7:30PM Jun 29, 2015Observed: 3.59 ft at 7:45PM Jun 29, 2015Observed: 3.56 ft at 8:00PM Jun 29, 2015Observed: 3.43 ft at 9:15PM Jun 29, 2015Observed: 3.35 ft at 9:30PM Jun 29, 2015Observed: 3.29 ft at 9:45PM Jun 29, 2015Observed: 3.22 ft at 10:00PM Jun 29, 2015Observed: 2.88 ft at 11:15PM Jun 29, 2015Observed: 2.84 ft at 11:30PM Jun 29, 2015Observed: 2.81 ft at 11:45PM Jun 29, 2015Observed: 2.8 ft at 12:00AM Jun 30, 2015Observed: 2.89 ft at 12:45AM Jun 30, 2015Observed: 2.99 ft at 1:00AM Jun 30, 2015Observed: 3.15 ft at 1:15AM Jun 30, 2015Observed: 3.34 ft at 1:30AM Jun 30, 2015Observed: 4.94 ft at 2:45AM Jun 30, 2015Observed: 5.27 ft at 3:00AM Jun 30, 2015Observed: 6.04 ft at 3:45AM Jun 30, 2015Observed: 6.17 ft at 4:00AM Jun 30, 2015Observed: 6.26 ft at 4:15AM Jun 30, 2015Observed: 6.27 ft at 4:30AM Jun 30, 2015Observed: 6.06 ft at 5:15AM Jun 30, 2015Observed: 5.92 ft at 5:30AM Jun 30, 2015Observed: 5.73 ft at 5:45AM Jun 30, 2015Observed: 5.55 ft at 6:00AM Jun 30, 2015Observed: 5.08 ft at 6:45AM Jun 30, 2015Observed: 4.95 ft at 7:00AM Jun 30, 2015Observed: 4.52 ft at 8:15AM Jun 30, 2015Observed: 4.43 ft at 8:30AM Jun 30, 2015Observed: 4.12 ft at 9:15AM Jun 30, 2015Observed: 4.02 ft at 9:30AM Jun 30, 2015Observed: 3.92 ft at 9:45AM Jun 30, 2015Observed: 3.82 ft at 10:00AM Jun 30, 2015Observed: 3.72 ft at 10:15AM Jun 30, 2015Observed: 3.63 ft at 10:30AM Jun 30, 2015Observed: 3.54 ft at 10:45AM Jun 30, 2015Observed: 3.46 ft at 11:00AM Jun 30, 2015Observed: 3.02 ft at 12:15PM Jun 30, 2015Observed: 2.92 ft at 12:30PM Jun 30, 2015Observed: 2.84 ft at 12:45PM Jun 30, 2015Observed: 2.76 ft at 1:00PM Jun 30, 2015Observed: 2.55 ft at 1:45PM Jun 30, 2015Observed: 2.51 ft at 2:00PM Jun 30, 2015Observed: 2.51 ft at 2:45PM Jun 30, 2015Observed: 2.58 ft at 3:00PM Jun 30, 2015Observed: 2.66 ft at 3:15PM Jun 30, 2015Observed: 2.79 ft at 3:30PM Jun 30, 2015Observed: 2.96 ft at 3:45PM Jun 30, 2015Observed: 3.17 ft at 4:00PM Jun 30, 2015Observed: 3.94 ft at 4:45PM Jun 30, 2015Observed: 4.21 ft at 5:00PM Jun 30, 2015Observed: 4.47 ft at 5:15PM Jun 30, 2015Observed: 4.67 ft at 5:30PM Jun 30, 2015Observed: 4.95 ft at 6:15PM Jun 30, 2015Observed: 4.9 ft at 6:30PM Jun 30, 2015Observed: 4.46 ft at 7:15PM Jun 30, 2015Observed: 4.3 ft at 7:30PM Jun 30, 2015Observed: 4.14 ft at 7:45PM Jun 30, 2015Observed: 4.02 ft at 8:00PM Jun 30, 2015Observed: 3.79 ft at 8:45PM Jun 30, 2015Observed: 3.75 ft at 9:00PM Jun 30, 2015Observed: 3.54 ft at 10:15PM Jun 30, 2015Observed: 3.47 ft at 10:30PM Jun 30, 2015Observed: 3.07 ft at 11:45PM Jun 30, 2015Observed: 3.01 ft at 12:00AM Jul 01, 2015Observed: 2.88 ft at 12:45AM Jul 01, 2015Observed: 2.88 ft at 1:00AM Jul 01, 2015Observed: 2.89 ft at 1:15AM Jul 01, 2015Observed: 2.93 ft at 1:30AM Jul 01, 2015Observed: 3.39 ft at 2:15AM Jul 01, 2015Observed: 3.66 ft at 2:30AM Jul 01, 2015Observed: 4.7 ft at 3:15AM Jul 01, 2015Observed: 5.07 ft at 3:30AM Jul 01, 2015Observed: 5.41 ft at 3:45AM Jul 01, 2015Observed: 5.72 ft at 4:00AM Jul 01, 2015Highest Observation: 6.31 ft at 5:15AM Jul 01, 2015Observed: 6.27 ft at 5:30AM Jul 01, 2015Observed: 6.17 ft at 5:45AM Jul 01, 2015Observed: 6.02 ft at 6:00AM Jul 01, 2015Observed: 5.84 ft at 6:15AM Jul 01, 2015Observed: 5.64 ft at 6:30AM Jul 01, 2015Observed: 5.14 ft at 7:15AM Jul 01, 2015Observed: 4.99 ft at 7:30AM Jul 01, 2015Observed: 4.86 ft at 7:45AM Jul 01, 2015Observed: 4.74 ft at 8:00AM Jul 01, 2015Forecast: 2.89 ft 1:00PM Jul 01, 2015Forecast: 2.55 ft 2:00PM Jul 01, 2015Forecast: 2.45 ft 3:00PM Jul 01, 2015Forecast: 2.81 ft 4:00PM Jul 01, 2015Forecast: 3.7 ft 5:00PM Jul 01, 2015Forecast: 4.48 ft 6:00PM Jul 01, 2015Forecast: 4.59 ft 7:00PM Jul 01, 2015Forecast: 4.17 ft 8:00PM Jul 01, 2015Forecast: 3.7 ft 9:00PM Jul 01, 2015Forecast: 3.35 ft 10:00PM Jul 01, 2015Forecast: 3.08 ft 11:00PM Jul 01, 2015Forecast: 2.77 ft 12:00AM Jul 02, 2015Forecast: 2.55 ft 1:00AM Jul 02, 2015Forecast: 2.55 ft 2:00AM Jul 02, 2015Forecast: 3.12 ft 3:00AM Jul 02, 2015Forecast: 4.25 ft 4:00AM Jul 02, 2015Forecast: 5.41 ft 5:00AM Jul 02, 2015Forecast: 5.91 ft 6:00AM Jul 02, 2015Forecast: 5.69 ft 7:00AM Jul 02, 2015Forecast: 5.17 ft 8:00AM Jul 02, 2015Forecast: 4.66 ft 9:00AM Jul 02, 2015Forecast: 4.28 ft 10:00AM Jul 02, 2015Forecast: 3.89 ft 11:00AM Jul 02, 2015Forecast: 3.51 ft 12:00PM Jul 02, 2015Forecast: 3.08 ft 1:00PM Jul 02, 2015Forecast: 2.69 ft 2:00PM Jul 02, 2015Forecast: 2.38 ft 3:00PM Jul 02, 2015Forecast: 2.31 ft 4:00PM Jul 02, 2015Forecast: 2.77 ft 5:00PM Jul 02, 2015Forecast: 3.78 ft 6:00PM Jul 02, 2015Forecast: 4.66 ft 7:00PM Jul 02, 2015Forecast: 4.8 ft 8:00PM Jul 02, 2015Forecast: 4.4 ft 9:00PM Jul 02, 2015Forecast: 3.89 ft 10:00PM Jul 02, 2015Forecast: 3.59 ft 11:00PM Jul 02, 2015Forecast: 3.32 ft 12:00AM Jul 03, 2015Forecast: 3.04 ft 1:00AM Jul 03, 2015Forecast: 2.81 ft 2:00AM Jul 03, 2015Forecast: 2.97 ft 3:00AM Jul 03, 2015Forecast: 3.78 ft 4:00AM Jul 03, 2015Forecast: 5.03 ft 5:00AM Jul 03, 2015Forecast: 5.87 ft 6:00AM Jul 03, 2015Forecast: 5.87 ft 7:00AM Jul 03, 2015Forecast: 5.31 ft 8:00AM Jul 03, 2015Forecast: 4.76 ft 9:00AM Jul 03, 2015Forecast: 4.39 ft 10:00AM Jul 03, 2015Forecast: 4.01 ft 11:00AM Jul 03, 2015Forecast: 3.62 ft 12:00PM Jul 03, 2015Forecast: 3.2 ft 1:00PM Jul 03, 2015Forecast: 2.77 ft 2:00PM Jul 03, 2015Forecast: 2.45 ft 3:00PM Jul 03, 2015Forecast: 2.27 ft 4:00PM Jul 03, 2015Forecast: 2.45 ft 5:00PM Jul 03, 2015Forecast: 3.24 ft 6:00PM Jul 03, 2015Forecast: 4.32 ft 7:00PM Jul 03, 2015Forecast: 4.95 ft 8:00PM Jul 03, 2015Forecast: 4.8 ft 9:00PM Jul 03, 2015Forecast: 4.32 ft 10:00PM Jul 03, 2015Forecast: 3.89 ft 11:00PM Jul 03, 2015Forecast: 3.54 ft 12:00AM Jul 04, 2015Forecast: 3.27 ft 1:00AM Jul 04, 2015Forecast: 3.01 ft 2:00AM Jul 04, 2015Forecast: 2.93 ft 3:00AM Jul 04, 2015Forecast: 3.31 ft 4:00AM Jul 04, 2015Forecast: 4.35 ft 5:00AM Jul 04, 2015Forecast: 5.49 ft 6:00AM Jul 04, 2015Highest Forecast: 6.07 ft 7:00AM Jul 04, 2015Forecast: 5.85 ft 8:00AM Jul 04, 2015Forecast: 5.3 ft 9:00AM Jul 04, 2015Forecast: 4.83 ft 10:00AM Jul 04, 2015Forecast: 4.47 ft 11:00AM Jul 04, 2015Forecast: 4.08 ft 12:00PM Jul 04, 2015Forecast: 3.66 ft 1:00PM Jul 04, 2015Forecast: 3.24 ft 2:00PM Jul 04, 2015Forecast: 2.81 ft 3:00PM Jul 04, 2015Forecast: 2.45 ft 4:00PM Jul 04, 2015Forecast: 2.27 ft 5:00PM Jul 04, 2015Forecast: 2.45 ft 6:00PM Jul 04, 2015Forecast: 3.24 ft 7:00PM Jul 04, 2015Forecast: 4.31 ft 8:00PM Jul 04, 2015Forecast: 4.91 ft 9:00PM Jul 04, 2015Forecast: 4.76 ft 10:00PM Jul 04, 2015Forecast: 4.24 ft 11:00PM Jul 04, 2015Forecast: 3.73 ft 12:00AM Jul 05, 2015Forecast: 3.39 ft 1:00AM Jul 05, 2015Forecast: 3.08 ft 2:00AM Jul 05, 2015Forecast: 2.77 ft 3:00AM Jul 05, 2015Forecast: 2.63 ft 4:00AM Jul 05, 2015Forecast: 2.97 ft 5:00AM Jul 05, 2015Forecast: 3.97 ft 6:00AM Jul 05, 2015Forecast: 5.09 ft 7:00AM Jul 05, 2015Forecast: 5.63 ft 8:00AM Jul 05, 2015Forecast: 5.41 ft 9:00AM Jul 05, 2015Forecast: 4.87 ft 10:00AM Jul 05, 2015Forecast: 4.35 ft 11:00AM Jul 05, 2015Forecast: 3.97 ft 12:00PM Jul 05, 2015Forecast: 3.58 ft 1:00PM Jul 05, 2015Forecast: 3.2 ft 2:00PM Jul 05, 2015Forecast: 2.77 ft 3:00PM Jul 05, 2015Forecast: 2.41 ft 4:00PM Jul 05, 2015Forecast: 2.13 ft 5:00PM Jul 05, 2015Forecast: 2.17 ft 6:00PM Jul 05, 2015Forecast: 2.77 ft 7:00PM Jul 05, 2015Forecast: 3.93 ft 8:00PM Jul 05, 2015Forecast: 4.83 ft 9:00PM Jul 05, 2015Forecast: 4.94 ft 10:00PM Jul 05, 2015Forecast: 4.43 ft 11:00PM Jul 05, 2015Forecast: 3.85 ft 12:00AM Jul 06, 2015Forecast: 3.47 ft 1:00AM Jul 06, 2015Forecast: 3.16 ft 2:00AM Jul 06, 2015Forecast: 2.81 ft 3:00AM Jul 06, 2015Forecast: 2.52 ft 4:00AM Jul 06, 2015Forecast: 2.41 ft 5:00AM Jul 06, 2015Forecast: 2.69 ft 6:00AM Jul 06, 2015Forecast: 3.58 ft 7:00AM Jul 06, 2015Forecast: 4.68 ft 8:00AM Jul 06, 2015Forecast: 5.19 ft 9:00AM Jul 06, 2015Forecast: 4.97 ft 10:00AM Jul 06, 2015Forecast: 4.42 ft 11:00AM Jul 06, 2015Forecast: 3.92 ft 12:00PM Jul 06, 2015PRTO3(plotting HGIRP) Graph Created (12:48PM Jul 1, 2015)ObservedForecast (issued 10:13AM Jul 1)Latest observed value: 4.74 ft at 8:00 AM PDT 1-Jul-2015. Flood Stage is 18 ft
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About this graph
Tabular Data (UTC)
Tabular Data (PDT)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Gauge reading affected by ocean tides.

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

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Upstream Gauge - below Falls at Oregon City Upstream Gauge Downstream Gauge Downstream Gauge - at St. Helens
Flood Categories (in feet)
Major Flood Stage: 28
Moderate Flood Stage: 24
Flood Stage: 18
Action Stage: 0
Low Stage (in feet): 1

Historic Crests
(1) 33.00 ft on 06/07/1894
(2) 30.00 ft on 06/14/1948
(3) 30.00 ft on 06/01/1948
(4) 29.80 ft on 12/25/1964
(5) 28.70 ft on 02/06/1890
(6) 28.55 ft on 02/09/1996
(7) 28.20 ft on 06/24/1876
(8) 27.30 ft on 07/01/1880
(9) 26.40 ft on 06/04/1956
(10) 26.20 ft on 06/14/1882
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 28.55 ft on 02/09/1996
(2) 18.90 ft on 02/24/1986
(3) 20.10 ft on 02/21/1982
(4) 18.27 ft on 12/16/1977
(5) 23.84 ft on 01/18/1974
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) -2.20 ft on 12/08/1990
(2) -0.58 ft on 07/14/2001
(3) -0.51 ft on 10/10/2001
Show More Low Water Records

For more information on your flood risk go to www.floodsmart.gov.

Zoom Level:15
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.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
30 Above 30.0 ft, Expect flooding of downtown Portland from Park Ave east to the Willamette and north of Burnside. Historically, Union Station begins to flood at this point and rail traffic will likely be impacted. Expect flooding of Oaks Park, along with moorages and industrial areas from Oregon City through downtown Portland into industrial NW Portland.
28.8 At 28.8 ft, Expect the river level to reach the top of the lowest point of the downtown Portland sea-wall. Flooding of some portions of Waterfront Park is possible at this and higher stages.
27 Above 27.0 ft, Expect flooding of Front Street near the Burnside Bridge.
26 Above 26.0 ft, Expect flooding of numerous structures along the Willamette river from Oregon city to the confluence with the Columbia.
24 Above 24.0 ft, Expect localized flooding in the Northwest Portland industrial area.
22 Above 22.0 ft, Expect minor localized flooding along the Willamette from Oregon City to the confluence with the Columbia.
18 Above 18.0 ft, Expect minor flooding of localized areas along the lower willamette. Flooding is mainly confined to the islands on the willamette river from oregon city to the confluence with the columbia.
Photos
(1) downstream view from gage
(2) NWS gage house
(3) upstream view from gage
About This Location Collapse

Latitude: 45.518333° N, Longitude: 122.671111° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 18 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 1.55 19.6 Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  
Additional Information Collapse
Low Water Alerts are issued for stages below 1.0'
Archived/Historical Data at USACE DataQuery
10-day Forecast/Trend, Northwest River Forecast Center
Resources Collapse
Hydrologic Resources Additional Resources
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
Portland Weather Forecast Office
5241 NE 122nd Avenue
Portland, OR 97230-1089
(503) 261-9246
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Page last modified: 12-Feb-2015 9:33 PM
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