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Hydrograph River at a Glance Download
Skagit River near Concrete Stage (ft)Flow (kcfs)Observed: 15.33 ft at 4:30AM Sep 16, 2021Observed: 15.33 ft at 4:45AM Sep 16, 2021Observed: 15.31 ft at 5:00AM Sep 16, 2021Observed: 15.34 ft at 5:15AM Sep 16, 2021Observed: 15.33 ft at 5:30AM Sep 16, 2021Observed: 15.3 ft at 5:45AM Sep 16, 2021Observed: 15.29 ft at 6:00AM Sep 16, 2021Observed: 15.3 ft at 6:15AM Sep 16, 2021Observed: 15.3 ft at 6:30AM Sep 16, 2021Observed: 15.31 ft at 6:45AM Sep 16, 2021Observed: 15.29 ft at 7:00AM Sep 16, 2021Observed: 15.31 ft at 7:15AM Sep 16, 2021Observed: 15.26 ft at 7:30AM Sep 16, 2021Observed: 15.28 ft at 7:45AM Sep 16, 2021Observed: 15.26 ft at 8:00AM Sep 16, 2021Observed: 15.27 ft at 8:15AM Sep 16, 2021Observed: 15.24 ft at 8:45AM Sep 16, 2021Observed: 15.24 ft at 9:00AM Sep 16, 2021Observed: 15.19 ft at 9:15AM Sep 16, 2021Observed: 15.2 ft at 9:30AM Sep 16, 2021Observed: 15.18 ft at 9:45AM Sep 16, 2021Observed: 15.18 ft at 10:00AM Sep 16, 2021Observed: 15.17 ft at 10:15AM Sep 16, 2021Observed: 15.17 ft at 10:30AM Sep 16, 2021Observed: 15.15 ft at 10:45AM Sep 16, 2021Observed: 15.13 ft at 11:00AM Sep 16, 2021Observed: 15.12 ft at 11:15AM Sep 16, 2021Observed: 15.1 ft at 11:30AM Sep 16, 2021Observed: 15.09 ft at 11:45AM Sep 16, 2021Observed: 15.11 ft at 12:00PM Sep 16, 2021Observed: 15.08 ft at 12:15PM Sep 16, 2021Observed: 15.08 ft at 12:30PM Sep 16, 2021Observed: 15.08 ft at 12:45PM Sep 16, 2021Observed: 15.07 ft at 1:00PM Sep 16, 2021Observed: 15.05 ft at 1:15PM Sep 16, 2021Observed: 15.06 ft at 1:30PM Sep 16, 2021Observed: 15.06 ft at 1:45PM Sep 16, 2021Observed: 15.07 ft at 2:00PM Sep 16, 2021Observed: 15.05 ft at 2:15PM Sep 16, 2021Observed: 15.04 ft at 2:30PM Sep 16, 2021Observed: 15.04 ft at 2:45PM Sep 16, 2021Observed: 15.05 ft at 3:00PM Sep 16, 2021Observed: 15.05 ft at 3:15PM Sep 16, 2021Observed: 15.05 ft at 3:30PM Sep 16, 2021Observed: 15.05 ft at 3:45PM Sep 16, 2021Observed: 15.1 ft at 4:00PM Sep 16, 2021Observed: 15.12 ft at 4:15PM Sep 16, 2021Observed: 15.16 ft at 4:30PM Sep 16, 2021Observed: 15.2 ft at 4:45PM Sep 16, 2021Observed: 15.23 ft at 5:00PM Sep 16, 2021Observed: 15.25 ft at 5:15PM Sep 16, 2021Observed: 15.3 ft at 5:30PM Sep 16, 2021Observed: 15.32 ft at 5:45PM Sep 16, 2021Observed: 15.34 ft at 6:00PM Sep 16, 2021Observed: 15.34 ft at 6:15PM Sep 16, 2021Observed: 15.37 ft at 6:30PM Sep 16, 2021Observed: 15.35 ft at 6:45PM Sep 16, 2021Observed: 15.36 ft at 7:00PM Sep 16, 2021Observed: 15.38 ft at 7:15PM Sep 16, 2021Observed: 15.37 ft at 7:45PM Sep 16, 2021Observed: 15.39 ft at 8:00PM Sep 16, 2021Observed: 15.38 ft at 8:15PM Sep 16, 2021Observed: 15.36 ft at 8:30PM Sep 16, 2021Observed: 15.37 ft at 8:45PM Sep 16, 2021Observed: 15.36 ft at 9:00PM Sep 16, 2021Observed: 15.37 ft at 9:15PM Sep 16, 2021Observed: 15.34 ft at 9:30PM Sep 16, 2021Observed: 15.38 ft at 9:45PM Sep 16, 2021Observed: 15.36 ft at 10:00PM Sep 16, 2021Observed: 15.37 ft at 10:15PM Sep 16, 2021Observed: 15.34 ft at 10:30PM Sep 16, 2021Observed: 15.37 ft at 10:45PM Sep 16, 2021Observed: 15.38 ft at 11:00PM Sep 16, 2021Observed: 15.39 ft at 11:15PM Sep 16, 2021Observed: 15.38 ft at 11:30PM Sep 16, 2021Observed: 15.36 ft at 11:45PM Sep 16, 2021Observed: 15.37 ft at 12:00AM Sep 17, 2021Observed: 15.37 ft at 12:15AM Sep 17, 2021Observed: 15.38 ft at 12:30AM Sep 17, 2021Observed: 15.39 ft at 12:45AM Sep 17, 2021Observed: 15.38 ft at 1:00AM Sep 17, 2021Observed: 15.38 ft at 1:15AM Sep 17, 2021Observed: 15.37 ft at 1:30AM Sep 17, 2021Observed: 15.38 ft at 1:45AM Sep 17, 2021Observed: 15.39 ft at 2:00AM Sep 17, 2021Observed: 15.38 ft at 2:15AM Sep 17, 2021Observed: 15.37 ft at 2:30AM Sep 17, 2021Observed: 15.37 ft at 2:45AM Sep 17, 2021Observed: 15.38 ft at 3:00AM Sep 17, 2021Observed: 15.38 ft at 3:15AM Sep 17, 2021Observed: 15.37 ft at 3:30AM Sep 17, 2021Observed: 15.39 ft at 3:45AM Sep 17, 2021Observed: 15.37 ft at 4:00AM Sep 17, 2021Observed: 15.37 ft at 4:15AM Sep 17, 2021Observed: 15.38 ft at 4:30AM Sep 17, 2021Observed: 15.34 ft at 4:45AM Sep 17, 2021Observed: 15.34 ft at 5:00AM Sep 17, 2021Observed: 15.36 ft at 5:15AM Sep 17, 2021Observed: 15.33 ft at 5:30AM Sep 17, 2021Observed: 15.31 ft at 5:45AM Sep 17, 2021Observed: 15.31 ft at 6:00AM Sep 17, 2021Observed: 15.28 ft at 6:15AM Sep 17, 2021Observed: 15.29 ft at 6:30AM Sep 17, 2021Observed: 15.26 ft at 6:45AM Sep 17, 2021Observed: 15.25 ft at 7:00AM Sep 17, 2021Observed: 15.24 ft at 7:15AM Sep 17, 2021Observed: 15.21 ft at 7:30AM Sep 17, 2021Observed: 15.2 ft at 8:00AM Sep 17, 2021Observed: 15.2 ft at 8:15AM Sep 17, 2021Observed: 15.19 ft at 8:30AM Sep 17, 2021Observed: 15.2 ft at 8:45AM Sep 17, 2021Observed: 15.18 ft at 9:00AM Sep 17, 2021Observed: 15.18 ft at 9:15AM Sep 17, 2021Observed: 15.17 ft at 9:30AM Sep 17, 2021Observed: 15.2 ft at 9:45AM Sep 17, 2021Observed: 15.19 ft at 10:00AM Sep 17, 2021Observed: 15.19 ft at 10:15AM Sep 17, 2021Observed: 15.2 ft at 10:30AM Sep 17, 2021Observed: 15.18 ft at 10:45AM Sep 17, 2021Observed: 15.2 ft at 11:00AM Sep 17, 2021Observed: 15.2 ft at 11:15AM Sep 17, 2021Observed: 15.21 ft at 11:30AM Sep 17, 2021Observed: 15.2 ft at 11:45AM Sep 17, 2021Observed: 15.21 ft at 12:00PM Sep 17, 2021Observed: 15.2 ft at 12:15PM Sep 17, 2021Observed: 15.21 ft at 12:30PM Sep 17, 2021Observed: 15.24 ft at 12:45PM Sep 17, 2021Observed: 15.22 ft at 1:00PM Sep 17, 2021Observed: 15.23 ft at 1:15PM Sep 17, 2021Observed: 15.23 ft at 1:30PM Sep 17, 2021Observed: 15.22 ft at 1:45PM Sep 17, 2021Observed: 15.25 ft at 2:00PM Sep 17, 2021Observed: 15.23 ft at 2:15PM Sep 17, 2021Observed: 15.24 ft at 2:30PM Sep 17, 2021Observed: 15.29 ft at 3:00PM Sep 17, 2021Observed: 15.27 ft at 3:15PM Sep 17, 2021Observed: 15.3 ft at 3:30PM Sep 17, 2021Observed: 15.29 ft at 3:45PM Sep 17, 2021Observed: 15.31 ft at 4:00PM Sep 17, 2021Observed: 15.31 ft at 4:15PM Sep 17, 2021Observed: 15.3 ft at 4:30PM Sep 17, 2021Observed: 15.31 ft at 4:45PM Sep 17, 2021Observed: 15.3 ft at 5:00PM Sep 17, 2021Observed: 15.31 ft at 5:15PM Sep 17, 2021Observed: 15.33 ft at 5:30PM Sep 17, 2021Observed: 15.33 ft at 5:45PM Sep 17, 2021Observed: 15.36 ft at 6:00PM Sep 17, 2021Observed: 15.38 ft at 6:15PM Sep 17, 2021Observed: 15.39 ft at 6:30PM Sep 17, 2021Observed: 15.39 ft at 6:45PM Sep 17, 2021Observed: 15.42 ft at 7:00PM Sep 17, 2021Observed: 15.43 ft at 7:15PM Sep 17, 2021Observed: 15.44 ft at 7:30PM Sep 17, 2021Observed: 15.43 ft at 7:45PM Sep 17, 2021Observed: 15.46 ft at 8:00PM Sep 17, 2021Observed: 15.49 ft at 8:15PM Sep 17, 2021Observed: 15.49 ft at 8:30PM Sep 17, 2021Observed: 15.55 ft at 8:45PM Sep 17, 2021Observed: 15.58 ft at 9:00PM Sep 17, 2021Observed: 15.65 ft at 9:15PM Sep 17, 2021Observed: 15.75 ft at 9:30PM Sep 17, 2021Observed: 15.84 ft at 9:45PM Sep 17, 2021Observed: 15.95 ft at 10:00PM Sep 17, 2021Observed: 16.1 ft at 10:15PM Sep 17, 2021Observed: 16.26 ft at 10:30PM Sep 17, 2021Observed: 16.45 ft at 10:45PM Sep 17, 2021Observed: 16.64 ft at 11:00PM Sep 17, 2021Observed: 16.87 ft at 11:15PM Sep 17, 2021Observed: 17.03 ft at 11:30PM Sep 17, 2021Observed: 17.14 ft at 11:45PM Sep 17, 2021Observed: 17.27 ft at 12:00AM Sep 18, 2021Observed: 17.38 ft at 12:15AM Sep 18, 2021Observed: 17.4 ft at 12:30AM Sep 18, 2021Observed: 17.46 ft at 12:45AM Sep 18, 2021Observed: 17.56 ft at 1:00AM Sep 18, 2021Observed: 17.6 ft at 1:15AM Sep 18, 2021Observed: 17.69 ft at 1:30AM Sep 18, 2021Observed: 17.82 ft at 1:45AM Sep 18, 2021Observed: 17.93 ft at 2:00AM Sep 18, 2021Observed: 18.03 ft at 2:15AM Sep 18, 2021Observed: 18.05 ft at 2:30AM Sep 18, 2021Observed: 18.15 ft at 2:45AM Sep 18, 2021Observed: 18.18 ft at 3:00AM Sep 18, 2021Observed: 18.27 ft at 3:15AM Sep 18, 2021Observed: 18.43 ft at 3:30AM Sep 18, 2021Observed: 18.55 ft at 3:45AM Sep 18, 2021Highest Observation: 18.7 ft at 4:00AM Sep 18, 2021Forecast: 18.02 ft 5:00AM Sep 18, 2021Forecast: 20.23 ft 11:00AM Sep 18, 2021Highest Forecast: 21.28 ft 5:00PM Sep 18, 2021Forecast: 21.17 ft 11:00PM Sep 18, 2021Forecast: 20.38 ft 5:00AM Sep 19, 2021Forecast: 19.43 ft 11:00AM Sep 19, 2021Forecast: 18.59 ft 5:00PM Sep 19, 2021Forecast: 18.05 ft 11:00PM Sep 19, 2021Forecast: 17.75 ft 5:00AM Sep 20, 2021Forecast: 18.23 ft 11:00AM Sep 20, 2021Forecast: 17.94 ft 5:00PM Sep 20, 2021Forecast: 17.63 ft 11:00PM Sep 20, 2021Forecast: 17.36 ft 5:00AM Sep 21, 2021Forecast: 17.16 ft 11:00AM Sep 21, 2021Forecast: 17.01 ft 5:00PM Sep 21, 2021Forecast: 16.13 ft 11:00PM Sep 21, 2021Forecast: 16.05 ft 5:00AM Sep 22, 2021Forecast: 16 ft 11:00AM Sep 22, 2021Forecast: 15.97 ft 5:00PM Sep 22, 2021Forecast: 15.99 ft 11:00PM Sep 22, 2021Forecast: 16.1 ft 5:00AM Sep 23, 2021Forecast: 16.27 ft 11:00AM Sep 23, 2021Forecast: 16.42 ft 5:00PM Sep 23, 2021Forecast: 16.36 ft 11:00PM Sep 23, 2021Forecast: 16.23 ft 5:00AM Sep 24, 2021Forecast: 16.1 ft 11:00AM Sep 24, 2021Forecast: 15.99 ft 5:00PM Sep 24, 2021Forecast: 15.9 ft 11:00PM Sep 24, 2021USGS--Water Resources of the United StatesCONW1(plotting HGIRG) Graph Created (4:19AM Sep 18, 2021)ObservedForecast (issued 9:44PM Sep 17)Latest observed value: 18.7 ft at 4:00 AM PDT 18-Sep-2021. Flood Stage is 28 ft
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About this graph
Tabular Data (UTC)
Tabular Data (PDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: River forecasts for this location take into account past and future precipitation. The stages/flows that will occur may be different if future rainfall is different than forecast.

Reliability of the Forecast: Based on current and forecast river, weather and reservoir conditions

NOTE: Forecasts for the Skagit River near Concrete are issued routinely year-round.

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Downstream Gauge Downstream Gauge - near Mt Vernon
Flood Categories (in feet)
Major Flood Stage: 32.5
Moderate Flood Stage: 30
Flood Stage: 28
Action Stage: 23.5
Low Stage (in feet): 0

Historic Crests
(1) 69.30 ft on 01/01/1815
(2) 42.21 ft on 10/21/2003
(3) 41.57 ft on 11/29/1995
(4) 40.80 ft on 11/27/1949
(5) 40.20 ft on 11/10/1990
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 30.66 ft on 02/02/2020 (P)
(2) 34.69 ft on 11/23/2017 (P)
(3) 31.28 ft on 11/22/2017 (P)
(4) 28.96 ft on 01/28/2016 (P)
(5) 30.14 ft on 12/09/2015 (P)
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:16
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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
40 the Skagit River will cause severe near record flooding from Rockport downstream through Sedro Woolley. Deep and swift flood waters will inundate and damage roads...farms and business and residential areas...especially Cape Horn...Hamilton...and Thunderbird. Cockreham Island...the Nookachamps and the Sterling areas will be inundated. Levees east of Sedro Woolley may be damaged. This level at this location on the Skagit corresponds to a Phase 3 flood in the Skagit County flood system.
37 the Skagit River will cause major flooding from Rockport downstream through Sedro Woolley. Deep and swift flood waters will inundate many roads...farms...and some business and residential areas especially Cape Horn...Hamilton...and Thunderbird. Cockreham Island...the Nookachamps area and the Sterling area will be inundated. Levees east of Sedro Woolley may be damaged. This level for this location on the Skagit corresponds to a Phase 3 flood in the Skagit County flood system.
32.5 the Skagit River will cause flooding from Rockport downstream through Sedro Woolley. Flood waters will inundate low areas near the river...roads...and several residential areas mainly Cape Horn...Hamilton and Thunderbird. Some water will flow onto Cockreham Island and into the Nookachamps and Sterling areas. Flooding will also occur in headwaters...tributaries...and other streams within the Skagit Basin. This level for this location corresponds to a Phase 2 flood in the Skagit County flood system.
28 the Skagit River will flood low areas and sections of roads along the river from Rockport downstream to Sedro Woolley. This level for this location on the Skagit corresponds to a Phase 1 flood in the Skagit County flood system.
About This Location Collapse

Latitude: 48.524444° N, Longitude: 121.769722° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 28 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 29 130 ft 158 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:
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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
Seattle Weather Forecast Office
7600 Sandpoint Way NE
Seattle, WA 98115-6349
(206) 526-6087
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