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Hydrograph River at a Glance Download
Thorne River near Thorne Bay Stage (ft)Highest Observation: 7.7 ft at 12:00AM Mar 20, 2023Observed: 7.64 ft at 4:00AM Mar 20, 2023Observed: 7.5 ft at 8:00AM Mar 20, 2023Observed: 7.16 ft at 1:00PM Mar 20, 2023Observed: 7.12 ft at 4:00PM Mar 20, 2023Observed: 7.09 ft at 8:00PM Mar 20, 2023Observed: 7.08 ft at 12:00AM Mar 21, 2023Observed: 7.02 ft at 4:00AM Mar 21, 2023Observed: 6.88 ft at 8:00AM Mar 21, 2023Observed: 6.68 ft at 12:00PM Mar 21, 2023Observed: 6.39 ft at 12:00AM Mar 22, 2023Observed: 6.29 ft at 4:00AM Mar 22, 2023Observed: 6.19 ft at 8:00AM Mar 22, 2023Observed: 5.96 ft at 12:00PM Mar 22, 2023Observed: 5.85 ft at 4:00PM Mar 22, 2023Observed: 5.69 ft at 9:00PM Mar 22, 2023Observed: 5.6 ft at 1:00AM Mar 23, 2023Observed: 5.48 ft at 8:00AM Mar 23, 2023Observed: 5.4 ft at 12:00PM Mar 23, 2023Observed: 5.47 ft at 8:00PM Mar 23, 2023Observed: 5.59 ft at 12:00AM Mar 24, 2023Observed: 5.53 ft at 8:00AM Mar 24, 2023Observed: 5.39 ft at 12:00PM Mar 24, 2023Observed: 5.29 ft at 12:00AM Mar 25, 2023Observed: 5.34 ft at 4:00AM Mar 25, 2023Observed: 5.26 ft at 8:00AM Mar 25, 2023Observed: 5.1 ft at 12:00PM Mar 25, 2023Observed: 4.96 ft at 8:00AM Mar 26, 2023Observed: 4.99 ft at 12:00PM Mar 26, 2023PWTA2(plotting HGIRZ) Graph Created (8:47PM Mar 26, 2023)ObservedLatest observed value: 4.99 ft at 12:00 PM AKDT 26-Mar-2023. Flood Stage is 12.5 ft
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About this graph
Tabular Data (UTC)
Tabular Data (AKDT)
XML Data
RSS Files
Datum: Not Available
NOTE: Gage data do not meet the quality standards of USGS gages.

NOTE: Stage may be affected by ice during winter months.

NOTE: Forecasts are not available for the Thorne River near Thorne Bay. Only observed stages are available for this point.

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Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 14.5
Flood Stage: 12.5
Action Stage: 11
Low Stage (in feet): -9999

Historic Crests
(1) 14.98 ft on 01/14/2014
(2) 14.82 ft on 03/12/2014
(3) 12.81 ft on 01/21/2015
(4) 12.74 ft on 11/02/2020
(5) 12.66 ft on 11/29/2020
(6) 12.13 ft on 10/02/2021
(7) 12.04 ft on 10/21/2015
(8) 11.52 ft on 11/22/2019
(9) 11.51 ft on 09/12/2012
(10) 11.31 ft on 12/11/2013
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 12.13 ft on 10/02/2021
(2) 12.66 ft on 11/29/2020
(3) 12.74 ft on 11/02/2020
(4) 11.52 ft on 11/22/2019
(5) 10.81 ft on 11/30/2016
(6) 10.37 ft on 09/26/2016
(7) 12.04 ft on 10/21/2015
(8) 12.81 ft on 01/21/2015
(9) 14.82 ft on 03/12/2014
(10) 14.98 ft on 01/14/2014
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:13
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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
14.5 3 to 4 ft of water will be over the road upstream from the Thorne River bridge.
12.5 Water will begin to flow over the road upstream from the Thorne River bridge.
(1) Thorne River overview
(2) Downstream view during high water.
(3) Upstream view during high water.
(4) Flooded roadway near gage. Stage 14.5ft.
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Latitude: 55.705670° N, Longitude: 132.627800° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 12.5 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 Not Available Not Available  
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NWS Information
National Weather Service
Juneau Weather Forecast Office
8500 Mendenhall Loop Road
Juneau, AK 99801
(907) 790-6802
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Page last modified: 2-Nov-2020 7:26 PM
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