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Hydrograph River at a Glance Download
Trail River near Lawing Stage (ft)Highest Observation: 5 ft at 8:00AM Sep 09, 2020Observed: 4.6 ft at 9:00AM Sep 12, 2020Observed: 4.5 ft at 9:00AM Sep 13, 2020Observed: 4.5 ft at 9:00AM Sep 14, 2020Observed: 4.4 ft at 9:00AM Sep 15, 2020Observed: 4.3 ft at 9:00AM Sep 16, 2020Observed: 4.2 ft at 9:00AM Sep 17, 2020Forecast: 5.77 ft 10:00AM Sep 18, 2020Forecast: 6.12 ft 4:00PM Sep 18, 2020Forecast: 6.3 ft 10:00PM Sep 18, 2020Highest Forecast: 6.34 ft 4:00AM Sep 19, 2020Forecast: 6.28 ft 10:00AM Sep 19, 2020Forecast: 6.15 ft 4:00PM Sep 19, 2020Forecast: 6.01 ft 10:00PM Sep 19, 2020Forecast: 5.85 ft 4:00AM Sep 20, 2020Forecast: 5.71 ft 10:00AM Sep 20, 2020Forecast: 5.58 ft 4:00PM Sep 20, 2020Forecast: 5.47 ft 10:00PM Sep 20, 2020MPTA2(plotting HGIRV) Graph Created (7:16AM Sep 18, 2020)ObservedForecast (issued 11:44AM Sep 17)Latest observed value: 4.2 ft at 9:00 AM AKDT 17-Sep-2020. Flood Stage is 10 ft
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Tabular Data (UTC)
Tabular Data (AKDT)
XML Data
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Datum: Not Available
NOTE: Gauge readings not available during the winter months.

NOTE: Forecasts for the Trail River near Lawing 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 Cooper Landing
Flood Categories (in feet)
Major Flood Stage: 13
Moderate Flood Stage: 11.5
Flood Stage: 10
Action Stage: 8.5
Low Stage (in feet): -9999

Historic Crests
(1) 12.50 ft on 09/21/1995
(2) 11.93 ft on 09/18/1967
(3) 11.50 ft on 01/06/1999
(4) 11.09 ft on 10/24/2002
(5) 10.73 ft on 09/22/1976
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(P): Preliminary values subject to further review.

Recent Crests
(1) 8.40 ft on 06/19/2018
(2) 7.70 ft on 09/01/2017 (P)
(3) 8.00 ft on 06/26/2016 (P)
(4) 7.70 ft on 06/30/2015 (P)
(5) 7.90 ft on 08/13/2014 (P)
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(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
12.5 This is the estimated level during the September 1995 flood event. Water was inundating parking lots and several roads around Moose Pass.
11.5 High water from the lake starts to encroach some structures at Moose Pass.
(1) Trail River staff gauge on old bridge pier.
(2) Downstream stage 6.7ft
(3) Upstream stage 6.7ft
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Latitude: 60.433056° N, Longitude: 149.373889° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 10 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 29 460 ft 470 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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Long-term Hydrograph
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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: 1-Mar-2019 12:31 AM
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