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Web Portal Changes: In Spring 2024, the Advanced Hydrologic Prediction Service (AHPS) hosted at will be replaced by the National Water Prediction Service (NWPS) at a repurposed A preview of NWPS is available here, where you can see your station hydrograph by replacing SSSSS with the station 5-character id:

Flood Inundation Mapping: Experimental real-time flood Inundation mapping services for 10% of the United States are now available via the NWS Map Viewer. Additional products and geospatial services depicting River Forecast Center and National Water Model forecasts continue to be accessible as described in the StoryMap here.

Please visit for more information.

Hydrograph River at a Glance Download
Anchor River at New Sterling Hwy Stage (ft)Observed: 14.68 ft at 3:00PM Feb 26, 2024Observed: 14.73 ft at 9:00PM Feb 26, 2024Observed: 14.78 ft at 3:36AM Feb 27, 2024Highest Observation: 14.84 ft at 9:00AM Feb 27, 2024Observed: 14.56 ft at 4:48PM Feb 27, 2024Observed: 14.68 ft at 9:00PM Feb 27, 2024Observed: 14.6 ft at 3:36AM Feb 28, 2024Observed: 14.67 ft at 9:00AM Feb 28, 2024Observed: 14.29 ft at 4:00PM Feb 28, 2024Observed: 14.23 ft at 9:00PM Feb 28, 2024Observed: 14.14 ft at 3:00AM Feb 29, 2024Observed: 14.09 ft at 9:36AM Feb 29, 2024Observed: 13.83 ft at 3:36PM Feb 29, 2024Observed: 13.78 ft at 9:00PM Feb 29, 2024Observed: 13.75 ft at 3:00AM Mar 01, 2024Observed: 13.76 ft at 9:00AM Mar 01, 2024Observed: 13.6 ft at 4:00PM Mar 01, 2024Observed: 13.58 ft at 9:00PM Mar 01, 2024Observed: 13.44 ft at 3:00AM Mar 02, 2024Observed: 13.26 ft at 9:36AM Mar 02, 2024Observed: 13.11 ft at 3:36PM Mar 02, 2024Observed: 13.07 ft at 9:00PM Mar 02, 2024Observed: 13.05 ft at 3:00AM Mar 03, 2024Observed: 13.08 ft at 9:36AM Mar 03, 2024Observed: 13.03 ft at 4:48PM Mar 03, 2024Observed: 13.02 ft at 9:00PM Mar 03, 2024Observed: 13.01 ft at 3:00AM Mar 04, 2024Observed: 12.99 ft at 9:00AM Mar 04, 2024APBA2(plotting HGIRZ) Graph Created (10:01AM Mar 4, 2024)ObservedLatest observed value: 12.99 ft at 9:00 AM AKST 4-Mar-2024. Flood Stage is 15.5 ft
About this graph
Tabular Data (UTC)
Tabular Data (AKST)
XML Data
RSS Files
Datum: Not Available
NOTE: Stage may be affected by ice.

NOTE: Forecasts for the Anchor River at New Sterling Hwy are issued routinely during the warm season, and as needed at other times of the year.

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Downstream Gauge Downstream Gauge - at Anchor Point
Flood Categories (in feet)
Major Flood Stage: 11
Moderate Flood Stage: 9
Flood Stage: 8
Action Stage: 7
Low Stage (in feet): -9999

Historic Crests
(1) 10.86 ft on 12/03/1978
(2) 9.10 ft on 11/23/2002
(3) 8.45 ft on 10/22/1980
(4) 8.29 ft on 01/12/1984
(5) 7.42 ft on 11/29/1983
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 7.02 ft on 12/10/2019 (P)
(2) 4.49 ft on 10/13/2018
(3) 3.83 ft on 09/28/2018
(4) 4.73 ft on 12/03/2017 (P)
(5) 3.52 ft on 11/02/2016
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) -15.00 ft on 02/26/1984
(2) -15.00 ft on 08/19/1983
(3) -15.00 ft on 01/10/1980
Show More Low Water Records

For more information on your flood risk go to

Zoom Level:11
KML Image
Gauge LocationGauge Map Marker
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
14.4 Edge of Sterling Highway adjacent to bridge where gauge is located.
11.9 Top of rip-rap at Sterling Highway bridge. (APTA2)
8.5 Edge of Sterling Highway 0.4 miles west of the bridge. (APTA2)
8 Top of rip-rap adjacent to Sterling Highway approx. 0.4 miles west (downstream) of the Sterling Highway bridge (APTA2). Approximated minor flood stage.
7 Action Stage.
(1) Downstream
(2) Downstream photo
(3) Upstream photo
About This Location Collapse

Latitude: 59.747222° N, Longitude: 151.753056° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 8 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(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 NULL NULL 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
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6930 Sand Lake Road
Anchorage, AK 99502
(907) 266-5105
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