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Hydrograph River at a Glance Download
Fortymile River at West Fork Stage (ft)Observed: 5.96 ft at 6:46PM Sep 26, 2022Observed: 5.9 ft at 7:27PM Sep 26, 2022Observed: 5.9 ft at 7:54PM Sep 26, 2022Observed: 5.91 ft at 8:54PM Sep 26, 2022Observed: 5.89 ft at 9:54PM Sep 26, 2022Observed: 5.9 ft at 11:13PM Sep 26, 2022Observed: 5.9 ft at 11:55PM Sep 26, 2022Observed: 5.9 ft at 1:07AM Sep 27, 2022Observed: 5.9 ft at 2:01AM Sep 27, 2022Observed: 5.91 ft at 2:54AM Sep 27, 2022Observed: 5.88 ft at 3:54AM Sep 27, 2022Observed: 5.93 ft at 4:55AM Sep 27, 2022Observed: 5.9 ft at 6:01AM Sep 27, 2022Observed: 5.9 ft at 6:54AM Sep 27, 2022Observed: 5.93 ft at 7:54AM Sep 27, 2022Observed: 5.92 ft at 9:15AM Sep 27, 2022Observed: 5.91 ft at 9:54AM Sep 27, 2022Observed: 5.85 ft at 11:08AM Sep 27, 2022Observed: 5.8 ft at 11:54AM Sep 27, 2022Observed: 5.77 ft at 12:55PM Sep 27, 2022Observed: 5.78 ft at 1:55PM Sep 27, 2022Observed: 5.83 ft at 3:01PM Sep 27, 2022Observed: 5.87 ft at 3:55PM Sep 27, 2022Observed: 5.88 ft at 4:54PM Sep 27, 2022Observed: 5.8 ft at 7:44PM Sep 27, 2022Observed: 5.82 ft at 8:00PM Sep 27, 2022Observed: 5.84 ft at 8:54PM Sep 27, 2022Observed: 5.83 ft at 9:55PM Sep 27, 2022Observed: 5.83 ft at 10:56PM Sep 27, 2022Observed: 5.83 ft at 11:54PM Sep 27, 2022Observed: 5.88 ft at 12:56AM Sep 28, 2022Observed: 5.84 ft at 1:54AM Sep 28, 2022Observed: 5.85 ft at 2:54AM Sep 28, 2022Observed: 5.88 ft at 3:54AM Sep 28, 2022Observed: 5.84 ft at 4:54AM Sep 28, 2022Observed: 5.86 ft at 5:54AM Sep 28, 2022Observed: 5.9 ft at 6:54AM Sep 28, 2022Observed: 5.88 ft at 7:54AM Sep 28, 2022Observed: 5.86 ft at 9:22AM Sep 28, 2022Observed: 5.81 ft at 10:01AM Sep 28, 2022Observed: 5.75 ft at 10:55AM Sep 28, 2022Observed: 5.69 ft at 11:54AM Sep 28, 2022Observed: 5.7 ft at 1:01PM Sep 28, 2022Observed: 5.71 ft at 2:01PM Sep 28, 2022Observed: 5.79 ft at 2:54PM Sep 28, 2022Observed: 5.83 ft at 5:58PM Sep 28, 2022Observed: 5.68 ft at 8:22PM Sep 28, 2022Observed: 5.73 ft at 8:54PM Sep 28, 2022Observed: 5.76 ft at 9:55PM Sep 28, 2022Observed: 5.8 ft at 11:08PM Sep 28, 2022Observed: 5.77 ft at 11:54PM Sep 28, 2022Observed: 5.77 ft at 12:55AM Sep 29, 2022Observed: 5.75 ft at 1:55AM Sep 29, 2022Observed: 5.78 ft at 2:54AM Sep 29, 2022Observed: 5.79 ft at 3:54AM Sep 29, 2022Observed: 5.8 ft at 5:01AM Sep 29, 2022Observed: 5.8 ft at 5:55AM Sep 29, 2022Observed: 5.79 ft at 6:54AM Sep 29, 2022Observed: 5.79 ft at 7:54AM Sep 29, 2022Observed: 5.75 ft at 9:34AM Sep 29, 2022Observed: 5.73 ft at 9:54AM Sep 29, 2022Observed: 5.67 ft at 10:54AM Sep 29, 2022Observed: 5.63 ft at 12:01PM Sep 29, 2022Observed: 5.61 ft at 12:54PM Sep 29, 2022Observed: 5.6 ft at 1:54PM Sep 29, 2022Observed: 5.72 ft at 3:01PM Sep 29, 2022Observed: 5.76 ft at 3:54PM Sep 29, 2022Observed: 5.75 ft at 4:54PM Sep 29, 2022Observed: 5.68 ft at 6:01PM Sep 29, 2022Observed: 5.69 ft at 8:14PM Sep 29, 2022Observed: 5.66 ft at 9:18PM Sep 29, 2022Observed: 5.69 ft at 10:33PM Sep 29, 2022Observed: 5.71 ft at 10:54PM Sep 29, 2022Observed: 5.74 ft at 12:08AM Sep 30, 2022Observed: 5.75 ft at 12:55AM Sep 30, 2022Observed: 5.73 ft at 1:55AM Sep 30, 2022Observed: 5.71 ft at 2:54AM Sep 30, 2022Observed: 5.73 ft at 3:54AM Sep 30, 2022Observed: 5.73 ft at 4:54AM Sep 30, 2022Observed: 5.71 ft at 6:01AM Sep 30, 2022Observed: 5.72 ft at 6:54AM Sep 30, 2022Observed: 5.73 ft at 7:55AM Sep 30, 2022Observed: 5.65 ft at 9:01AM Sep 30, 2022Observed: 5.64 ft at 9:55AM Sep 30, 2022Observed: 5.56 ft at 10:54AM Sep 30, 2022Observed: 5.58 ft at 11:54AM Sep 30, 2022Observed: 5.55 ft at 12:54PM Sep 30, 2022Observed: 5.55 ft at 2:07PM Sep 30, 2022Observed: 5.63 ft at 2:55PM Sep 30, 2022Observed: 5.68 ft at 3:55PM Sep 30, 2022Observed: 5.62 ft at 4:55PM Sep 30, 2022Observed: 5.61 ft at 7:32PM Sep 30, 2022Observed: 5.59 ft at 8:26PM Sep 30, 2022Observed: 5.61 ft at 8:54PM Sep 30, 2022Observed: 5.61 ft at 10:01PM Sep 30, 2022Observed: 5.63 ft at 10:54PM Sep 30, 2022Observed: 5.64 ft at 12:01AM Oct 01, 2022Observed: 5.66 ft at 12:54AM Oct 01, 2022Observed: 5.64 ft at 1:54AM Oct 01, 2022Observed: 5.64 ft at 2:54AM Oct 01, 2022Observed: 5.65 ft at 3:54AM Oct 01, 2022Observed: 5.67 ft at 4:55AM Oct 01, 2022Observed: 5.65 ft at 5:54AM Oct 01, 2022Observed: 5.65 ft at 6:54AM Oct 01, 2022Observed: 5.67 ft at 7:54AM Oct 01, 2022Observed: 5.7 ft at 10:00AM Oct 01, 2022Observed: 5.71 ft at 11:01AM Oct 01, 2022Observed: 5.7 ft at 1:15PM Oct 01, 2022Observed: 5.66 ft at 1:56PM Oct 01, 2022Observed: 5.66 ft at 2:55PM Oct 01, 2022Observed: 5.68 ft at 4:07PM Oct 01, 2022Observed: 5.66 ft at 5:58PM Oct 01, 2022Observed: 5.68 ft at 7:02PM Oct 01, 2022Observed: 5.65 ft at 7:55PM Oct 01, 2022Observed: 5.66 ft at 8:54PM Oct 01, 2022Observed: 5.65 ft at 9:55PM Oct 01, 2022Observed: 5.68 ft at 10:54PM Oct 01, 2022Observed: 5.68 ft at 11:54PM Oct 01, 2022Observed: 5.67 ft at 12:55AM Oct 02, 2022Observed: 5.69 ft at 1:55AM Oct 02, 2022Observed: 5.75 ft at 2:54AM Oct 02, 2022Observed: 5.77 ft at 3:54AM Oct 02, 2022Observed: 5.8 ft at 5:01AM Oct 02, 2022Observed: 5.77 ft at 5:55AM Oct 02, 2022Observed: 5.78 ft at 6:54AM Oct 02, 2022Observed: 5.83 ft at 7:54AM Oct 02, 2022Observed: 5.82 ft at 9:13AM Oct 02, 2022Observed: 5.84 ft at 9:54AM Oct 02, 2022Observed: 5.88 ft at 11:06AM Oct 02, 2022Observed: 5.88 ft at 11:55AM Oct 02, 2022Observed: 5.86 ft at 12:54PM Oct 02, 2022Observed: 5.88 ft at 2:22PM Oct 02, 2022Observed: 5.85 ft at 3:01PM Oct 02, 2022Observed: 5.88 ft at 4:14PM Oct 02, 2022Observed: 5.88 ft at 5:52PM Oct 02, 2022Observed: 5.87 ft at 6:10PM Oct 02, 2022Observed: 5.91 ft at 6:56PM Oct 02, 2022Observed: 5.9 ft at 10:13PM Oct 02, 2022Observed: 5.9 ft at 10:54PM Oct 02, 2022Observed: 5.92 ft at 12:34AM Oct 03, 2022Observed: 5.95 ft at 12:54AM Oct 03, 2022Observed: 5.94 ft at 1:54AM Oct 03, 2022Observed: 5.94 ft at 2:54AM Oct 03, 2022Observed: 5.96 ft at 3:55AM Oct 03, 2022Observed: 5.97 ft at 4:54AM Oct 03, 2022Observed: 5.98 ft at 5:55AM Oct 03, 2022Observed: 5.97 ft at 6:54AM Oct 03, 2022Observed: 5.96 ft at 7:54AM Oct 03, 2022Highest Observation: 5.99 ft at 9:01AM Oct 03, 2022Observed: 5.97 ft at 9:54AM Oct 03, 2022Observed: 5.96 ft at 11:01AM Oct 03, 2022Observed: 5.94 ft at 11:55AM Oct 03, 2022Observed: 5.83 ft at 12:54PM Oct 03, 2022Observed: 5.91 ft at 2:02PM Oct 03, 2022Observed: 5.94 ft at 2:55PM Oct 03, 2022Observed: 5.96 ft at 4:01PM Oct 03, 2022Highest Forecast: 5.91 ft 10:00PM Oct 03, 2022Forecast: 5.89 ft 4:00AM Oct 04, 2022Forecast: 5.86 ft 10:00AM Oct 04, 2022Forecast: 5.84 ft 4:00PM Oct 04, 2022Forecast: 5.82 ft 10:00PM Oct 04, 2022Forecast: 5.8 ft 4:00AM Oct 05, 2022Forecast: 5.77 ft 10:00AM Oct 05, 2022Forecast: 5.75 ft 4:00PM Oct 05, 2022Forecast: 5.73 ft 10:00PM Oct 05, 2022FMWA2(plotting HGIRZ) Graph Created (4:47PM Oct 3, 2022)ObservedForecast (issued 1:08PM Oct 3)Latest observed value: 5.96 ft at 4:01 PM AKDT 3-Oct-2022. Flood Stage is 21 ft
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About this graph
Tabular Data (UTC)
Tabular Data (AKDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: NWS gage operated on a seasonal basis. No data available during winter months.

NOTE: Gage data do not meet the quality standards of USGS gages.

NOTE: Forecasts are not available for the Fortymile River at West Fork. Only observed stages are available for this point.

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Upstream Gauge - at Mosquito Fork Upstream Gauge Downstream Gauge Downstream Gauge - at South Fork
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 21
Action Stage: 12
Low Stage (in feet): -9999

Historic Crests

(P): Preliminary values subject to further review.

Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:6
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
21 low spot in approach from the south to the bridge near the campground becomes flooded.
12 bankfull stage.
Photos
(1) Bridge
(2) Downstream
(3) Upstream
(4) Fortymile River at West Fork looking downstream, Stage = 7.15 ft
About This Location Collapse

Latitude: 63.889444° N, Longitude: 142.232222° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 21 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 1828.59 ft 1849.59 ft 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 Not Available Not Available  
Additional Information Collapse
Long-term Hydrograph
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
Fairbanks Weather Forecast Office
UAF-IARC Bldg. P.O. Box 757345
Fairbanks, AK 99775-7345
(907) 458-3700
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Page last modified: 2-Nov-2020 7:26 PM
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