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Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at will be replaced by the National Water Prediction Service (NWPS), with a target of March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

Experimental National Water Center Products: The National Hydrologic Discussion, Area Hydrologic Discussion, and Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via, as described in the StoryMap here.

Hydrograph River at a Glance Download
Chelatna Lake near Lake Outlet Stage (ft)CLKA2(plotting HGIRZ) Graph Created (11:16AM Sep 21, 2023)Flood Stage is 3.3 ft
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Tabular Data (UTC)
Tabular Data (AKDT)
XML Data
RSS Files
Datum: Not Available
NOTE: Gauge readings currently unavailable.

NOTE: Forecasts are not available for the Chelatna Lake near Lake Outlet. Only observed stages are available for this point.

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Downstream Gauge Downstream Gauge - at Lake Creek
Flood Categories (in feet)
Major Flood Stage: 5
Moderate Flood Stage: 4
Flood Stage: 3.3
Action Stage: 3
Low Stage (in feet): -9999

Historic Crests
(1) 4.29 ft on 09/24/2012 (P)
(2) 4.00 ft on 08/17/1993
(3) 3.95 ft on 09/06/1993
(4) 3.76 ft on 06/09/2014 (P)
(5) 3.50 ft on 08/16/2006
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(P): Preliminary values subject to further review.

Recent Crests
(1) 2.50 ft on 05/22/2016 (P)
(2) 3.00 ft on 06/05/2015 (P)
(3) 3.76 ft on 06/09/2014 (P)
(4) 2.65 ft on 08/12/2013 (P)
(5) 4.29 ft on 09/24/2012 (P)
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:11
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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.
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If you notice any errors in the below information, please contact our Webmaster
(1) Aerial view
(2) Staff gage in front of lodge
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Latitude: 62.434444° N, Longitude: 151.409722° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 3.3 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 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other 1400 ft 1403.3 ft  
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Long-term Hydrograph
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Hydrologic Resources Additional Resources
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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
Anchorage Weather Forecast Office
6930 Sand Lake Road
Anchorage, AK 99502
(907) 266-5160
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Page last modified: 2-Nov-2020 7:26 PM
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