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Hydrograph River at a Glance Download
Gulkana River at Sourdough Stage (ft)Observed: 2.12 ft at 6:00AM Apr 16, 2021Observed: 2.11 ft at 9:00AM Apr 16, 2021Observed: 2.11 ft at 10:00AM Apr 16, 2021Observed: 2.11 ft at 11:00AM Apr 16, 2021Observed: 2.11 ft at 12:00PM Apr 16, 2021Observed: 2.11 ft at 1:00PM Apr 16, 2021Observed: 2.12 ft at 2:00PM Apr 16, 2021Observed: 2.12 ft at 3:00PM Apr 16, 2021Observed: 2.12 ft at 4:00PM Apr 16, 2021Observed: 2.12 ft at 5:00PM Apr 16, 2021Observed: 2.12 ft at 6:00PM Apr 16, 2021Observed: 2.11 ft at 7:00PM Apr 16, 2021Observed: 2.12 ft at 8:00PM Apr 16, 2021Observed: 2.14 ft at 9:00PM Apr 16, 2021Observed: 2.12 ft at 10:00PM Apr 16, 2021Observed: 2.11 ft at 11:00PM Apr 16, 2021Observed: 2.12 ft at 12:00AM Apr 17, 2021Observed: 2.12 ft at 1:00AM Apr 17, 2021Observed: 2.12 ft at 2:00AM Apr 17, 2021Observed: 2.12 ft at 3:00AM Apr 17, 2021Observed: 2.12 ft at 4:00AM Apr 17, 2021Observed: 2.12 ft at 5:00AM Apr 17, 2021Observed: 2.13 ft at 6:00AM Apr 17, 2021Observed: 2.12 ft at 7:00AM Apr 17, 2021Observed: 2.12 ft at 8:00AM Apr 17, 2021Observed: 2.11 ft at 9:00AM Apr 17, 2021Observed: 2.11 ft at 10:00AM Apr 17, 2021Observed: 2.1 ft at 11:00AM Apr 17, 2021Observed: 2.1 ft at 12:00PM Apr 17, 2021Observed: 2.11 ft at 1:00PM Apr 17, 2021Observed: 2.11 ft at 2:00PM Apr 17, 2021Observed: 2.11 ft at 3:00PM Apr 17, 2021Observed: 2.12 ft at 4:00PM Apr 17, 2021Observed: 2.12 ft at 5:00PM Apr 17, 2021Observed: 2.12 ft at 6:00PM Apr 17, 2021Observed: 2.12 ft at 7:00PM Apr 17, 2021Observed: 2.12 ft at 8:00PM Apr 17, 2021Observed: 2.12 ft at 9:00PM Apr 17, 2021Observed: 2.13 ft at 10:00PM Apr 17, 2021Observed: 2.13 ft at 11:00PM Apr 17, 2021Observed: 2.13 ft at 12:00AM Apr 18, 2021Observed: 2.12 ft at 1:00AM Apr 18, 2021Observed: 2.12 ft at 2:00AM Apr 18, 2021Observed: 2.12 ft at 3:00AM Apr 18, 2021Observed: 2.13 ft at 4:00AM Apr 18, 2021Observed: 2.12 ft at 5:00AM Apr 18, 2021Observed: 2.12 ft at 6:00AM Apr 18, 2021Observed: 2.12 ft at 7:00AM Apr 18, 2021Observed: 2.12 ft at 8:00AM Apr 18, 2021Observed: 2.11 ft at 9:00AM Apr 18, 2021Observed: 2.11 ft at 10:00AM Apr 18, 2021Observed: 2.11 ft at 11:00AM Apr 18, 2021Observed: 2.11 ft at 12:00PM Apr 18, 2021Observed: 2.11 ft at 1:00PM Apr 18, 2021Observed: 2.12 ft at 2:00PM Apr 18, 2021Observed: 2.12 ft at 3:00PM Apr 18, 2021Observed: 2.12 ft at 4:00PM Apr 18, 2021Observed: 2.13 ft at 5:00PM Apr 18, 2021Observed: 2.13 ft at 6:00PM Apr 18, 2021Observed: 2.12 ft at 7:00PM Apr 18, 2021Observed: 2.13 ft at 8:00PM Apr 18, 2021Observed: 2.13 ft at 9:00PM Apr 18, 2021Observed: 2.13 ft at 10:00PM Apr 18, 2021Observed: 2.13 ft at 11:00PM Apr 18, 2021Observed: 2.13 ft at 12:00AM Apr 19, 2021Observed: 2.13 ft at 1:00AM Apr 19, 2021Observed: 2.13 ft at 2:00AM Apr 19, 2021Observed: 2.13 ft at 3:00AM Apr 19, 2021Observed: 2.12 ft at 4:00AM Apr 19, 2021Observed: 2.12 ft at 5:00AM Apr 19, 2021Observed: 2.12 ft at 6:00AM Apr 19, 2021Observed: 2.12 ft at 7:00AM Apr 19, 2021Observed: 2.12 ft at 8:00AM Apr 19, 2021Observed: 2.11 ft at 9:00AM Apr 19, 2021Observed: 2.11 ft at 10:00AM Apr 19, 2021Observed: 2.12 ft at 11:00AM Apr 19, 2021Observed: 2.11 ft at 12:00PM Apr 19, 2021Observed: 2.11 ft at 1:00PM Apr 19, 2021Observed: 2.13 ft at 2:00PM Apr 19, 2021Observed: 2.12 ft at 3:00PM Apr 19, 2021Observed: 2.13 ft at 4:00PM Apr 19, 2021Observed: 2.13 ft at 5:00PM Apr 19, 2021Observed: 2.14 ft at 6:00PM Apr 19, 2021Observed: 2.13 ft at 7:00PM Apr 19, 2021Observed: 2.13 ft at 8:00PM Apr 19, 2021Observed: 2.13 ft at 9:00PM Apr 19, 2021Observed: 2.14 ft at 10:00PM Apr 19, 2021Observed: 2.14 ft at 11:00PM Apr 19, 2021Observed: 2.13 ft at 12:00AM Apr 20, 2021Observed: 2.13 ft at 1:00AM Apr 20, 2021Observed: 2.13 ft at 2:00AM Apr 20, 2021Observed: 2.13 ft at 3:00AM Apr 20, 2021Observed: 2.13 ft at 4:00AM Apr 20, 2021Observed: 2.13 ft at 5:00AM Apr 20, 2021Observed: 2.13 ft at 6:00AM Apr 20, 2021Observed: 2.12 ft at 7:00AM Apr 20, 2021Observed: 2.13 ft at 8:00AM Apr 20, 2021Observed: 2.12 ft at 9:00AM Apr 20, 2021Observed: 2.12 ft at 10:00AM Apr 20, 2021Observed: 2.12 ft at 11:00AM Apr 20, 2021Observed: 2.12 ft at 12:00PM Apr 20, 2021Observed: 2.13 ft at 1:00PM Apr 20, 2021Observed: 2.12 ft at 2:00PM Apr 20, 2021Observed: 2.14 ft at 3:00PM Apr 20, 2021Observed: 2.12 ft at 4:00PM Apr 20, 2021Observed: 2.12 ft at 5:00PM Apr 20, 2021Observed: 2.13 ft at 6:00PM Apr 20, 2021Observed: 2.13 ft at 7:00PM Apr 20, 2021Observed: 2.13 ft at 8:00PM Apr 20, 2021Observed: 2.13 ft at 9:00PM Apr 20, 2021Observed: 2.14 ft at 10:00PM Apr 20, 2021Observed: 2.13 ft at 11:00PM Apr 20, 2021Observed: 2.13 ft at 12:00AM Apr 21, 2021Observed: 2.13 ft at 1:00AM Apr 21, 2021Observed: 2.13 ft at 2:00AM Apr 21, 2021Observed: 2.13 ft at 3:00AM Apr 21, 2021Observed: 2.13 ft at 4:00AM Apr 21, 2021Observed: 2.13 ft at 5:00AM Apr 21, 2021Observed: 2.13 ft at 6:00AM Apr 21, 2021Observed: 2.13 ft at 7:00AM Apr 21, 2021Observed: 2.14 ft at 8:00AM Apr 21, 2021Observed: 2.13 ft at 9:00AM Apr 21, 2021Observed: 2.13 ft at 10:00AM Apr 21, 2021Observed: 2.13 ft at 11:00AM Apr 21, 2021Observed: 2.13 ft at 12:00PM Apr 21, 2021Observed: 2.13 ft at 1:00PM Apr 21, 2021Observed: 2.13 ft at 2:00PM Apr 21, 2021Observed: 2.13 ft at 3:00PM Apr 21, 2021Observed: 2.13 ft at 4:00PM Apr 21, 2021Observed: 2.13 ft at 5:00PM Apr 21, 2021Observed: 2.13 ft at 6:00PM Apr 21, 2021Observed: 2.13 ft at 7:00PM Apr 21, 2021Observed: 2.14 ft at 8:00PM Apr 21, 2021Observed: 2.15 ft at 9:00PM Apr 21, 2021Observed: 2.14 ft at 10:00PM Apr 21, 2021Observed: 2.14 ft at 11:00PM Apr 21, 2021Observed: 2.14 ft at 12:00AM Apr 22, 2021Observed: 2.14 ft at 1:00AM Apr 22, 2021Observed: 2.14 ft at 2:00AM Apr 22, 2021Observed: 2.14 ft at 3:00AM Apr 22, 2021Observed: 2.15 ft at 4:00AM Apr 22, 2021Observed: 2.15 ft at 5:00AM Apr 22, 2021Observed: 2.15 ft at 6:00AM Apr 22, 2021Observed: 2.15 ft at 7:00AM Apr 22, 2021Observed: 2.15 ft at 8:00AM Apr 22, 2021Observed: 2.13 ft at 9:00AM Apr 22, 2021Observed: 2.13 ft at 10:00AM Apr 22, 2021Observed: 2.13 ft at 11:00AM Apr 22, 2021Observed: 2.13 ft at 12:00PM Apr 22, 2021Observed: 2.13 ft at 1:00PM Apr 22, 2021Observed: 2.14 ft at 2:00PM Apr 22, 2021Observed: 2.13 ft at 3:00PM Apr 22, 2021Observed: 2.13 ft at 4:00PM Apr 22, 2021Observed: 2.15 ft at 5:00PM Apr 22, 2021Observed: 2.15 ft at 6:00PM Apr 22, 2021Highest Observation: 2.18 ft at 7:00PM Apr 22, 2021Observed: 2.16 ft at 8:00PM Apr 22, 2021Observed: 2.15 ft at 9:00PM Apr 22, 2021Observed: 2.15 ft at 10:00PM Apr 22, 2021Observed: 2.15 ft at 11:00PM Apr 22, 2021Observed: 2.16 ft at 12:00AM Apr 23, 2021Observed: 2.15 ft at 1:00AM Apr 23, 2021Observed: 2.15 ft at 2:00AM Apr 23, 2021Observed: 2.15 ft at 3:00AM Apr 23, 2021Observed: 2.15 ft at 4:00AM Apr 23, 2021USDI Bureau of Land ManagementGPOA2(plotting HGIRG) Graph Created (5:17AM Apr 23, 2021)ObservedLatest observed value: 2.15 ft at 4:00 AM AKDT 23-Apr-2021.
About this graph
Tabular Data (UTC)
Tabular Data (AKDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Stage may be affected by ice.

NOTE: Forecasts for the Gulkana River at Sourdough are issued routinely during the warm season, and as needed at other times of the year.

Return to Area Map
Upstream Gauge - at Paxson Lake Outlet Upstream Gauge Downstream Gauge Downstream Gauge - at Richardson Highway Bridge
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 12
Flood Stage: 11
Action Stage: 9.5
Low Stage (in feet): -9999

Historic Crests
(1) 16.03 ft on 05/07/1976
(2) 14.64 ft on 05/05/2009
(3) 14.62 ft on 05/30/2013
(4) 12.00 ft on 10/10/2006
(5) 11.26 ft on 09/12/1990
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 8.85 ft on 05/02/2017
(2) 8.52 ft on 07/26/2016
(3) 9.58 ft on 05/11/2015
(4) -9,999.00 ft on 05/04/2014
(5) 14.62 ft on 05/30/2013
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:8
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
12.5 Stage associated with flow (16900 cfs) having a recurrence interval of >50 years; major flooding would be expected on this and nearby streams
12 Stage associated with flow (15200 cfs) having a recurrence interval of 20-40 years; moderate flooding would be expected on this and nearby streams
11 Stage associated with a flow (11900 cfs) having a recurrence interval of ~10 years; minor flooding would be expected on this and nearby streams
9.5 Bankfull -- stage associated with flow (7400 cfs) having a recurrence interval of ~2 years
Photos
(1) Upstream at Sourdough Campground stage 10.07ft
(2) Downstream stage 10.07ft
About This Location Collapse

Latitude: 62.520833° N, Longitude: 145.530833° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 11 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 NULL NULL  

Current/Historical Observations:
Additional Information Collapse
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
Anchorage Weather Forecast Office
6930 Sand Lake Road
Anchorage, AK 99502
(907) 266-5160
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