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Hydrograph River at a Glance Download
Thorne River near Thorne Bay Stage (ft)Observed: 4.63 ft at 4:00AM May 18, 2020Observed: 4.64 ft at 5:00AM May 18, 2020Observed: 4.09 ft at 6:00AM May 18, 2020Observed: 3.93 ft at 7:00AM May 18, 2020Observed: 4.39 ft at 8:00AM May 18, 2020Observed: 4.5 ft at 9:00AM May 18, 2020Observed: 4.29 ft at 10:00AM May 18, 2020Observed: 4.37 ft at 11:00AM May 18, 2020Observed: 4.44 ft at 12:00PM May 18, 2020Observed: 4.45 ft at 1:00PM May 18, 2020Observed: 4.49 ft at 2:00PM May 18, 2020Observed: 4.46 ft at 3:00PM May 18, 2020Observed: 4.46 ft at 4:00PM May 18, 2020Observed: 4.47 ft at 8:00PM May 18, 2020Observed: 4.49 ft at 9:00PM May 18, 2020Observed: 4.47 ft at 10:00PM May 18, 2020Observed: 4.45 ft at 11:00PM May 18, 2020Observed: 4.46 ft at 12:00AM May 19, 2020Observed: 4.45 ft at 1:00AM May 19, 2020Observed: 4.47 ft at 2:00AM May 19, 2020Observed: 4.49 ft at 3:00AM May 19, 2020Observed: 4.49 ft at 5:00AM May 19, 2020Observed: 4.54 ft at 6:00AM May 19, 2020Observed: 4.49 ft at 7:00AM May 19, 2020Observed: 4.54 ft at 8:00AM May 19, 2020Observed: 4.58 ft at 9:00AM May 19, 2020Observed: 4.57 ft at 10:00AM May 19, 2020Observed: 4.57 ft at 11:00AM May 19, 2020Observed: 4.54 ft at 12:00PM May 19, 2020Observed: 4.54 ft at 1:00PM May 19, 2020Observed: 4.54 ft at 2:00PM May 19, 2020Observed: 4.54 ft at 3:00PM May 19, 2020Observed: 4.54 ft at 6:00PM May 19, 2020Observed: 4.58 ft at 7:00PM May 19, 2020Observed: 4.58 ft at 8:00PM May 19, 2020Observed: 4.6 ft at 9:00PM May 19, 2020Observed: 4.6 ft at 10:00PM May 19, 2020Observed: 4.6 ft at 11:00PM May 19, 2020Observed: 4.64 ft at 12:00AM May 20, 2020Observed: 4.64 ft at 1:00AM May 20, 2020Observed: 4.67 ft at 2:00AM May 20, 2020Observed: 4.68 ft at 3:00AM May 20, 2020Observed: 4.73 ft at 5:00AM May 20, 2020Highest Observation: 4.74 ft at 6:00AM May 20, 2020Highest Observation: 4.74 ft at 7:00AM May 20, 2020Observed: 4.73 ft at 8:00AM May 20, 2020Observed: 4.68 ft at 9:00AM May 20, 2020Observed: 4.68 ft at 10:00AM May 20, 2020Observed: 4.62 ft at 11:00AM May 20, 2020Observed: 4.63 ft at 1:00PM May 20, 2020Observed: 4.61 ft at 2:00PM May 20, 2020Observed: 4.65 ft at 3:00PM May 20, 2020Observed: 4.62 ft at 4:00PM May 20, 2020Observed: 4.64 ft at 5:00PM May 20, 2020Observed: 4.53 ft at 6:00PM May 20, 2020Observed: 4.55 ft at 7:00PM May 20, 2020Observed: 4.64 ft at 8:00PM May 20, 2020Observed: 4.64 ft at 9:00PM May 20, 2020Observed: 4.63 ft at 10:00PM May 20, 2020Observed: 4.61 ft at 11:00PM May 20, 2020Observed: 4.61 ft at 12:00AM May 21, 2020Observed: 4.61 ft at 1:00AM May 21, 2020Observed: 4.59 ft at 2:00AM May 21, 2020Observed: 4.59 ft at 3:00AM May 21, 2020Observed: 4.59 ft at 4:00AM May 21, 2020Observed: 4.57 ft at 5:00AM May 21, 2020Observed: 4.54 ft at 6:00AM May 21, 2020Observed: 4.2 ft at 7:00AM May 21, 2020Observed: 4.26 ft at 8:00AM May 21, 2020Observed: 4.34 ft at 9:00AM May 21, 2020Observed: 4.28 ft at 10:00AM May 21, 2020Observed: 4.41 ft at 11:00AM May 21, 2020Observed: 4.43 ft at 12:00PM May 21, 2020Observed: 4.41 ft at 1:00PM May 21, 2020Observed: 4.4 ft at 2:00PM May 21, 2020Observed: 4.38 ft at 3:00PM May 21, 2020Observed: 4.4 ft at 8:00PM May 21, 2020Observed: 4.42 ft at 9:00PM May 21, 2020Observed: 4.4 ft at 10:00PM May 21, 2020Observed: 4.4 ft at 11:00PM May 21, 2020Observed: 4.37 ft at 12:00AM May 22, 2020Observed: 4.39 ft at 1:00AM May 22, 2020Observed: 4.38 ft at 2:00AM May 22, 2020Observed: 4.36 ft at 3:00AM May 22, 2020Observed: 4.38 ft at 5:00AM May 22, 2020Observed: 4.37 ft at 6:00AM May 22, 2020Observed: 4.35 ft at 7:00AM May 22, 2020Observed: 4.3 ft at 8:00AM May 22, 2020Observed: 4.25 ft at 9:00AM May 22, 2020Observed: 4.13 ft at 10:00AM May 22, 2020Observed: 4.06 ft at 11:00AM May 22, 2020Observed: 4.16 ft at 12:00PM May 22, 2020Observed: 4.22 ft at 1:00PM May 22, 2020Observed: 4.24 ft at 2:00PM May 22, 2020Observed: 4.26 ft at 3:00PM May 22, 2020Observed: 4.26 ft at 12:00AM May 23, 2020Observed: 4.28 ft at 1:00AM May 23, 2020Observed: 4.25 ft at 2:00AM May 23, 2020Observed: 4.28 ft at 3:00AM May 23, 2020Observed: 4.3 ft at 4:00AM May 23, 2020Observed: 4.29 ft at 5:00AM May 23, 2020Observed: 4.26 ft at 6:00AM May 23, 2020Observed: 4.24 ft at 7:00AM May 23, 2020Observed: 4.27 ft at 8:00AM May 23, 2020Observed: 4.26 ft at 9:00AM May 23, 2020Observed: 4.27 ft at 10:00AM May 23, 2020Observed: 4.28 ft at 11:00AM May 23, 2020Observed: 4.29 ft at 12:00PM May 23, 2020Observed: 4.3 ft at 1:00PM May 23, 2020Observed: 4.29 ft at 2:00PM May 23, 2020Observed: 4.24 ft at 3:00PM May 23, 2020Observed: 4.25 ft at 4:00PM May 23, 2020Observed: 4.25 ft at 5:00PM May 23, 2020Observed: 4.24 ft at 6:00PM May 23, 2020Observed: 4.29 ft at 7:00PM May 23, 2020Observed: 4.28 ft at 8:00PM May 23, 2020Observed: 4.26 ft at 9:00PM May 23, 2020Observed: 4.26 ft at 10:00PM May 23, 2020Observed: 4.25 ft at 11:00PM May 23, 2020Observed: 4.26 ft at 12:00AM May 24, 2020Observed: 4.28 ft at 1:00AM May 24, 2020Observed: 4.27 ft at 2:00AM May 24, 2020Observed: 4.28 ft at 3:00AM May 24, 2020Observed: 4.29 ft at 4:00AM May 24, 2020Observed: 4.31 ft at 5:00AM May 24, 2020Observed: 4.33 ft at 6:00AM May 24, 2020Observed: 4.34 ft at 7:00AM May 24, 2020Observed: 4.34 ft at 8:00AM May 24, 2020Observed: 4.29 ft at 9:00AM May 24, 2020Observed: 4.35 ft at 10:00AM May 24, 2020Observed: 4.4 ft at 11:00AM May 24, 2020Observed: 4.44 ft at 1:00PM May 24, 2020Observed: 4.46 ft at 2:00PM May 24, 2020Observed: 4.48 ft at 3:00PM May 24, 2020Observed: 4.48 ft at 6:00PM May 24, 2020Observed: 4.49 ft at 7:00PM May 24, 2020Observed: 4.49 ft at 8:00PM May 24, 2020Observed: 4.51 ft at 9:00PM May 24, 2020Observed: 4.51 ft at 10:00PM May 24, 2020Observed: 4.52 ft at 11:00PM May 24, 2020Observed: 4.51 ft at 12:00AM May 25, 2020Observed: 4.53 ft at 1:00AM May 25, 2020Observed: 4.53 ft at 2:00AM May 25, 2020Observed: 4.53 ft at 3:00AM May 25, 2020PWTA2(plotting HGIRZ) Graph Created (3:47AM May 25, 2020)ObservedLatest observed value: 4.53 ft at 3:00 AM AKDT 25-May-2020. Flood Stage is 12.5 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (AKDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts are not available for the Thorne River near Thorne Bay. Only observed stages are available for this point.
Return to Area Map
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) 12.04 ft on 10/21/2015
(5) 11.52 ft on 11/22/2019
(6) 11.51 ft on 09/12/2012
(7) 11.31 ft on 12/11/2013
(8) 10.81 ft on 11/30/2016
(9) 10.37 ft on 09/26/2016

(P): Preliminary values subject to further review.

Recent Crests
(1) 11.52 ft on 11/22/2019
(2) 10.81 ft on 11/30/2016
(3) 10.37 ft on 09/26/2016
(4) 12.04 ft on 10/21/2015
(5) 12.81 ft on 01/21/2015
(6) 14.82 ft on 03/12/2014
(7) 14.98 ft on 01/14/2014
(8) 11.31 ft on 12/11/2013
(9) 11.51 ft on 09/12/2012

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:13
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
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.
Photos
(1) Thorne River overview
(2) Downstream view during high water.
(3) Upstream view during high water.
(4) Flooded roadway near gage. Stage 14.5ft.
About This Location Collapse

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)		 Elevation
(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  
Additional Information Collapse
Long-term Hydrograph
Water Temperature Chart
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
Juneau Weather Forecast Office
8500 Mendenhall Loop Road
Juneau, AK 99801
(907) 790-6802
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