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Weather Forecast Office Anchorage, AK Alaska Pacific River Forecast Center

Hydrograph River at a Glance Download Weekly Chance of
Exceeding Levels		 Chance of Exceeding Levels
During Entire Period
Gulkana River at Sourdough Observed crest: 7.87 ft at 8:15am Feb 06 Observed: 7.15 ft at 4:00pm Feb 4 Observed: 7.15 ft at 4:45pm Feb 4 Observed: 7.15 ft at 5:30pm Feb 4 Observed: 7.15 ft at 5:45pm Feb 4 Observed: 7.16 ft at 6:00pm Feb 4 Observed: 7.16 ft at 6:15pm Feb 4 Observed: 7.15 ft at 6:30pm Feb 4 Observed: 7.16 ft at 6:45pm Feb 4 Observed: 7.16 ft at 7:00pm Feb 4 Observed: 7.15 ft at 7:15pm Feb 4 Observed: 7.15 ft at 7:30pm Feb 4 Observed: 7.15 ft at 7:45pm Feb 4 Observed: 7.15 ft at 8:00pm Feb 4 Observed: 7.16 ft at 8:15pm Feb 4 Observed: 7.15 ft at 8:30pm Feb 4 Observed: 7.16 ft at 8:45pm Feb 4 Observed: 7.15 ft at 9:00pm Feb 4 Observed: 7.16 ft at 9:15pm Feb 4 Observed: 7.16 ft at 9:30pm Feb 4 Observed: 7.16 ft at 9:45pm Feb 4 Observed: 7.16 ft at 10:00pm Feb 4 Observed: 7.16 ft at 10:15pm Feb 4 Observed: 7.15 ft at 10:30pm Feb 4 Observed: 7.16 ft at 10:45pm Feb 4 Observed: 7.16 ft at 11:00pm Feb 4 Observed: 7.16 ft at 11:45pm Feb 4 Observed: 7.16 ft at 12:00am Feb 5 Observed: 7.16 ft at 12:15am Feb 5 Observed: 7.16 ft at 12:30am Feb 5 Observed: 7.16 ft at 12:45am Feb 5 Observed: 7.16 ft at 1:00am Feb 5 Observed: 7.16 ft at 1:15am Feb 5 Observed: 7.15 ft at 1:30am Feb 5 Observed: 7.15 ft at 1:45am Feb 5 Observed: 7.15 ft at 2:00am Feb 5 Observed: 7.15 ft at 2:15am Feb 5 Observed: 7.15 ft at 2:30am Feb 5 Observed: 7.15 ft at 2:45am Feb 5 Observed: 7.14 ft at 3:00am Feb 5 Observed: 7.15 ft at 3:15am Feb 5 Observed: 7.15 ft at 3:30am Feb 5 Observed: 7.15 ft at 3:45am Feb 5 Observed: 7.14 ft at 4:00am Feb 5 Observed: 7.14 ft at 4:15am Feb 5 Observed: 7.15 ft at 4:30am Feb 5 Observed: 7.15 ft at 4:45am Feb 5 Observed: 7.15 ft at 5:00am Feb 5 Observed: 7.15 ft at 5:15am Feb 5 Observed: 7.15 ft at 5:30am Feb 5 Observed: 7.15 ft at 5:45am Feb 5 Observed: 7.15 ft at 6:00am Feb 5 Observed: 7.16 ft at 6:15am Feb 5 Observed: 7.16 ft at 6:30am Feb 5 Observed: 7.16 ft at 6:45am Feb 5 Observed: 7.16 ft at 7:00am Feb 5 Observed: 7.16 ft at 7:15am Feb 5 Observed: 7.16 ft at 7:30am Feb 5 Observed: 7.17 ft at 7:45am Feb 5 Observed: 7.17 ft at 8:00am Feb 5 Observed: 7.17 ft at 8:15am Feb 5 Observed: 7.17 ft at 8:30am Feb 5 Observed: 7.17 ft at 8:45am Feb 5 Observed: 7.17 ft at 9:00am Feb 5 Observed: 7.18 ft at 9:15am Feb 5 Observed: 7.18 ft at 9:30am Feb 5 Observed: 7.18 ft at 9:45am Feb 5 Observed: 7.18 ft at 10:00am Feb 5 Observed: 7.17 ft at 10:15am Feb 5 Observed: 7.17 ft at 10:30am Feb 5 Observed: 7.18 ft at 10:45am Feb 5 Observed: 7.17 ft at 11:00am Feb 5 Observed: 7.17 ft at 11:15am Feb 5 Observed: 7.17 ft at 11:30am Feb 5 Observed: 7.17 ft at 11:45am Feb 5 Observed: 7.17 ft at 12:00pm Feb 5 Observed: 7.16 ft at 12:15pm Feb 5 Observed: 7.16 ft at 12:30pm Feb 5 Observed: 7.15 ft at 12:45pm Feb 5 Observed: 7.15 ft at 1:00pm Feb 5 Observed: 7.14 ft at 1:30pm Feb 5 Observed: 7.14 ft at 1:45pm Feb 5 Observed: 7.14 ft at 4:15pm Feb 5 Observed: 7.14 ft at 4:30pm Feb 5 Observed: 7.14 ft at 4:45pm Feb 5 Observed: 7.15 ft at 5:00pm Feb 5 Observed: 7.15 ft at 5:15pm Feb 5 Observed: 7.15 ft at 5:30pm Feb 5 Observed: 7.15 ft at 5:45pm Feb 5 Observed: 7.15 ft at 6:00pm Feb 5 Observed: 7.16 ft at 6:15pm Feb 5 Observed: 7.16 ft at 6:30pm Feb 5 Observed: 7.16 ft at 6:45pm Feb 5 Observed: 7.16 ft at 7:00pm Feb 5 Observed: 7.16 ft at 7:15pm Feb 5 Observed: 7.16 ft at 7:30pm Feb 5 Observed: 7.16 ft at 7:45pm Feb 5 Observed: 7.16 ft at 8:00pm Feb 5 Observed: 7.2 ft at 8:15pm Feb 5 Observed: 7.63 ft at 2:45am Feb 6 Observed: 7.65 ft at 3:00am Feb 6 Observed: 7.68 ft at 3:15am Feb 6 Observed: 7.68 ft at 3:30am Feb 6 Observed: 7.71 ft at 3:45am Feb 6 Observed: 7.72 ft at 4:00am Feb 6 Observed: 7.75 ft at 4:15am Feb 6 Observed: 7.76 ft at 4:30am Feb 6 Observed: 7.77 ft at 4:45am Feb 6 Observed: 7.78 ft at 5:00am Feb 6 Observed: 7.79 ft at 5:15am Feb 6 Observed: 7.8 ft at 5:30am Feb 6 Observed: 7.8 ft at 5:45am Feb 6 Observed: 7.81 ft at 6:00am Feb 6 Observed: 7.82 ft at 6:15am Feb 6 Observed: 7.83 ft at 6:30am Feb 6 Observed: 7.84 ft at 6:45am Feb 6 Observed: 7.84 ft at 7:00am Feb 6 Observed: 7.85 ft at 7:15am Feb 6 Observed: 7.85 ft at 7:30am Feb 6 Observed: 7.86 ft at 7:45am Feb 6 Observed: 7.86 ft at 8:00am Feb 6 Observed: 7.87 ft at 8:15am Feb 6 Observed: 7.87 ft at 8:30am Feb 6 Observed: 7.87 ft at 8:45am Feb 6 Observed: 7.87 ft at 9:00am Feb 6 Observed: 7.87 ft at 9:15am Feb 6 Observed: 7.86 ft at 9:30am Feb 6 Observed: 7.85 ft at 9:45am Feb 6 Observed: 7.84 ft at 10:00am Feb 6 Observed: 7.85 ft at 10:15am Feb 6 Observed: 7.84 ft at 10:30am Feb 6 Observed: 7.83 ft at 10:45am Feb 6 Observed: 7.81 ft at 11:00am Feb 6 Observed: 7.8 ft at 11:15am Feb 6 Observed: 7.79 ft at 11:30am Feb 6 Observed: 7.79 ft at 11:45am Feb 6 Observed: 7.78 ft at 12:00pm Feb 6 Observed: 7.78 ft at 12:15pm Feb 6 Observed: 7.77 ft at 12:30pm Feb 6 Observed: 7.76 ft at 12:45pm Feb 6 Observed: 7.76 ft at 1:00pm Feb 6 Observed: 7.75 ft at 1:15pm Feb 6 Observed: 7.74 ft at 1:30pm Feb 6 Observed: 7.74 ft at 1:45pm Feb 6 Observed: 7.73 ft at 2:00pm Feb 6 Observed: 7.73 ft at 2:15pm Feb 6 Observed: 7.72 ft at 2:30pm Feb 6 Observed: 7.72 ft at 2:45pm Feb 6 Observed: 7.71 ft at 3:00pm Feb 6 Observed: 7.71 ft at 3:15pm Feb 6 Observed: 7.7 ft at 3:30pm Feb 6 Observed: 7.68 ft at 3:45pm Feb 6 Observed: 7.69 ft at 4:00pm Feb 6 Observed: 7.68 ft at 4:15pm Feb 6 Observed: 7.68 ft at 4:30pm Feb 6 Observed: 7.65 ft at 4:45pm Feb 6 Observed: 7.64 ft at 5:00pm Feb 6 Observed: 7.63 ft at 5:15pm Feb 6 Observed: 7.63 ft at 5:30pm Feb 6 Observed: 7.6 ft at 5:45pm Feb 6 Observed: 7.59 ft at 6:00pm Feb 6 Observed: 7.59 ft at 6:15pm Feb 6 Observed: 7.58 ft at 6:30pm Feb 6 Observed: 7.58 ft at 6:45pm Feb 6 Observed: 7.57 ft at 7:00pm Feb 6 Observed: 7.56 ft at 7:15pm Feb 6 Observed: 7.54 ft at 7:30pm Feb 6 Observed: 7.54 ft at 7:45pm Feb 6 Observed: 7.53 ft at 8:00pm Feb 6 Observed: 7.51 ft at 8:15pm Feb 6 Observed: 7.51 ft at 8:30pm Feb 6 Observed: 7.5 ft at 8:45pm Feb 6 Observed: 7.48 ft at 9:00pm Feb 6 Observed: 7.48 ft at 9:15pm Feb 6 Observed: 7.48 ft at 9:30pm Feb 6 Observed: 7.48 ft at 9:45pm Feb 6 Observed: 7.48 ft at 10:00pm Feb 6 Observed: 7.49 ft at 10:15pm Feb 6 Observed: 7.49 ft at 10:30pm Feb 6 Observed: 7.47 ft at 10:45pm Feb 6 Observed: 7.46 ft at 11:00pm Feb 6 Observed: 7.48 ft at 11:15pm Feb 6 Observed: 7.45 ft at 11:30pm Feb 6 Observed: 7.45 ft at 11:45pm Feb 6 Observed: 7.46 ft at 12:00am Feb 7 Observed: 7.45 ft at 12:15am Feb 7 Observed: 7.44 ft at 12:30am Feb 7 Observed: 7.45 ft at 12:45am Feb 7 Observed: 7.45 ft at 1:00am Feb 7 Observed: 7.44 ft at 1:15am Feb 7 Observed: 7.45 ft at 1:30am Feb 7 Observed: 7.44 ft at 1:45am Feb 7 Observed: 7.44 ft at 2:00am Feb 7 Observed: 7.44 ft at 2:15am Feb 7 Observed: 7.45 ft at 2:30am Feb 7 Observed: 7.45 ft at 2:45am Feb 7 Observed: 7.44 ft at 3:00am Feb 7 Observed: 7.44 ft at 3:15am Feb 7 Observed: 7.44 ft at 3:30am Feb 7 Observed: 7.44 ft at 3:45am Feb 7 Observed: 7.43 ft at 4:00am Feb 7 Observed: 7.43 ft at 4:15am Feb 7 Observed: 7.44 ft at 4:30am Feb 7 Observed: 7.43 ft at 4:45am Feb 7 Observed: 7.43 ft at 5:00am Feb 7 Observed: 7.43 ft at 5:15am Feb 7 Observed: 7.42 ft at 5:30am Feb 7 Observed: 7.43 ft at 5:45am Feb 7 Observed: 7.42 ft at 6:00am Feb 7 Observed: 7.42 ft at 6:15am Feb 7 Observed: 7.41 ft at 6:30am Feb 7 Observed: 7.41 ft at 6:45am Feb 7 Observed: 7.41 ft at 7:00am Feb 7 Observed: 7.4 ft at 7:15am Feb 7 Observed: 7.4 ft at 7:30am Feb 7 Observed: 7.39 ft at 7:45am Feb 7 Observed: 7.39 ft at 8:00am Feb 7 Observed: 7.37 ft at 8:15am Feb 7 Observed: 7.38 ft at 8:30am Feb 7 Observed: 7.37 ft at 8:45am Feb 7 Observed: 7.36 ft at 9:00am Feb 7 Observed: 7.37 ft at 9:15am Feb 7 Observed: 7.36 ft at 9:30am Feb 7 Observed: 7.35 ft at 9:45am Feb 7 Observed: 7.35 ft at 10:00am Feb 7 Observed: 7.35 ft at 10:15am Feb 7 Observed: 7.36 ft at 10:30am Feb 7 Observed: 7.34 ft at 11:45am Feb 7 Observed: 7.33 ft at 12:00pm Feb 7 Observed: 7.32 ft at 12:15pm Feb 7 Observed: 7.3 ft at 12:30pm Feb 7 Observed: 7.29 ft at 12:45pm Feb 7 Observed: 7.28 ft at 1:00pm Feb 7 Observed: 7.28 ft at 1:15pm Feb 7 Observed: 7.27 ft at 1:30pm Feb 7 Observed: 7.26 ft at 1:45pm Feb 7 Observed: 7.26 ft at 2:00pm Feb 7 Observed: 7.26 ft at 2:15pm Feb 7 Observed: 7.25 ft at 2:30pm Feb 7 Observed: 7.24 ft at 2:45pm Feb 7 Observed: 7.23 ft at 3:00pm Feb 7 Observed: 7.23 ft at 3:15pm Feb 7 Observed: 7.22 ft at 3:30pm Feb 7 Observed: 7.23 ft at 3:45pm Feb 7 Observed: 7.22 ft at 4:00pm Feb 7 Observed: 7.2 ft at 4:15pm Feb 7 Observed: 7.2 ft at 4:30pm Feb 7 Observed: 7.2 ft at 4:45pm Feb 7 Observed: 7.2 ft at 5:00pm Feb 7 Observed: 7.19 ft at 5:15pm Feb 7 Observed: 7.19 ft at 5:30pm Feb 7 Observed: 7.19 ft at 5:45pm Feb 7 Observed: 7.18 ft at 6:00pm Feb 7 Observed: 7.18 ft at 6:15pm Feb 7 Observed: 7.17 ft at 6:30pm Feb 7 Observed: 7.18 ft at 6:45pm Feb 7 Observed: 7.17 ft at 7:00pm Feb 7 Observed: 7.17 ft at 7:15pm Feb 7 Observed: 7.17 ft at 7:30pm Feb 7 Observed: 7.16 ft at 7:45pm Feb 7 Observed: 7.16 ft at 8:00pm Feb 7 Observed: 7.16 ft at 8:15pm Feb 7 Observed: 7.19 ft at 8:30pm Feb 7 Observed: 7.22 ft at 8:45pm Feb 7 Observed: 7.48 ft at 9:00pm Feb 7 Observed: 7.51 ft at 9:15pm Feb 7 Observed: 7.58 ft at 9:30pm Feb 7 Observed: 7.58 ft at 9:45pm Feb 7 Observed: 7.59 ft at 10:00pm Feb 7 Observed: 7.62 ft at 10:15pm Feb 7 Observed: 7.61 ft at 10:30pm Feb 7 Observed: 7.63 ft at 10:45pm Feb 7 Observed: 7.64 ft at 11:00pm Feb 7 Observed: 7.62 ft at 11:15pm Feb 7 Observed: 7.67 ft at 11:30pm Feb 7 Observed: 7.72 ft at 11:45pm Feb 7 Observed: 7.73 ft at 12:00am Feb 8 Observed: 7.73 ft at 12:15am Feb 8 Observed: 7.73 ft at 12:30am Feb 8 Observed: 7.74 ft at 12:45am Feb 8 Observed: 7.74 ft at 1:00am Feb 8 Observed: 7.74 ft at 1:15am Feb 8 Observed: 7.75 ft at 1:30am Feb 8 Observed: 7.76 ft at 1:45am Feb 8 Observed: 7.77 ft at 2:00am Feb 8 Observed: 7.77 ft at 2:15am Feb 8 Observed: 7.77 ft at 2:30am Feb 8 Observed: 7.78 ft at 2:45am Feb 8 Observed: 7.78 ft at 3:00am Feb 8 Observed: 7.79 ft at 3:15am Feb 8 Observed: 7.8 ft at 3:30am Feb 8 Observed: 7.8 ft at 3:45am Feb 8 Observed: 7.81 ft at 5:45am Feb 8 Observed: 7.8 ft at 7:45am Feb 8 Observed: 7.81 ft at 8:00am Feb 8 Observed: 7.81 ft at 8:15am Feb 8 Observed: 7.67 ft at 3:45pm Feb 8 Observed: 7.67 ft at 4:30pm Feb 8 Observed: 7.66 ft at 4:45pm Feb 8 Observed: 7.66 ft at 5:00pm Feb 8 Observed: 7.65 ft at 5:15pm Feb 8 Observed: 7.65 ft at 5:30pm Feb 8 Observed: 7.65 ft at 5:45pm Feb 8 Observed: 7.66 ft at 6:00pm Feb 8 Observed: 7.65 ft at 6:15pm Feb 8 Observed: 7.65 ft at 6:30pm Feb 8 Observed: 7.65 ft at 6:45pm Feb 8 Observed: 7.65 ft at 7:00pm Feb 8 Observed: 7.65 ft at 7:15pm Feb 8 Observed: 7.66 ft at 7:30pm Feb 8 Observed: 7.66 ft at 7:45pm Feb 8 Observed: 7.65 ft at 8:00pm Feb 8 Observed: 7.65 ft at 8:15pm Feb 8 Observed: 7.65 ft at 8:30pm Feb 8 Observed: 7.64 ft at 8:45pm Feb 8 Observed: 7.64 ft at 9:00pm Feb 8 Observed: 7.64 ft at 9:15pm Feb 8 Observed: 7.65 ft at 9:30pm Feb 8 Observed: 7.65 ft at 9:45pm Feb 8 Observed: 7.65 ft at 10:00pm Feb 8 Observed: 7.65 ft at 10:15pm Feb 8 Observed: 7.64 ft at 10:30pm Feb 8 Observed: 7.64 ft at 10:45pm Feb 8 Observed: 7.65 ft at 11:00pm Feb 8 Observed: 7.64 ft at 11:15pm Feb 8 Observed: 7.64 ft at 11:30pm Feb 8 Observed: 7.65 ft at 11:45pm Feb 8 Observed: 7.65 ft at 12:00am Feb 9 Observed: 7.65 ft at 12:15am Feb 9 Observed: 7.65 ft at 12:30am Feb 9 Observed: 7.64 ft at 12:45am Feb 9 Observed: 7.64 ft at 1:00am Feb 9 Observed: 7.64 ft at 1:15am Feb 9 Observed: 7.64 ft at 1:30am Feb 9 Observed: 7.64 ft at 1:45am Feb 9 Observed: 7.64 ft at 2:00am Feb 9 Observed: 7.64 ft at 2:15am Feb 9 Observed: 7.64 ft at 2:30am Feb 9 Observed: 7.64 ft at 2:45am Feb 9 Observed: 7.64 ft at 3:00am Feb 9 Observed: 7.64 ft at 3:15am Feb 9 Observed: 7.64 ft at 3:30am Feb 9 Observed: 7.64 ft at 3:45am Feb 9 Observed: 7.64 ft at 4:00am Feb 9 Observed: 7.64 ft at 4:15am Feb 9 Observed: 7.64 ft at 4:30am Feb 9 Observed: 7.64 ft at 4:45am Feb 9 Observed: 7.64 ft at 5:00am Feb 9 Observed: 7.63 ft at 5:15am Feb 9 Observed: 7.63 ft at 5:30am Feb 9 Observed: 7.63 ft at 5:45am Feb 9 Observed: 7.64 ft at 6:00am Feb 9 Observed: 7.63 ft at 6:15am Feb 9 Observed: 7.63 ft at 6:30am Feb 9 Observed: 7.63 ft at 6:45am Feb 9 Observed: 7.63 ft at 7:00am Feb 9 Observed: 7.64 ft at 7:15am Feb 9 Observed: 7.64 ft at 7:30am Feb 9 Observed: 7.63 ft at 7:45am Feb 9 Observed: 7.63 ft at 8:00am Feb 9 Observed: 7.62 ft at 8:15am Feb 9 Observed: 7.63 ft at 8:30am Feb 9 Observed: 7.62 ft at 8:45am Feb 9 Observed: 7.63 ft at 9:00am Feb 9 Observed: 7.62 ft at 9:15am Feb 9 Observed: 7.61 ft at 9:30am Feb 9 Observed: 7.61 ft at 9:45am Feb 9 Observed: 7.62 ft at 10:00am Feb 9 Observed: 7.62 ft at 10:15am Feb 9 Observed: 7.62 ft at 10:30am Feb 9 Observed: 7.61 ft at 10:45am Feb 9 Observed: 7.61 ft at 11:00am Feb 9 Observed: 7.6 ft at 11:15am Feb 9 Observed: 7.61 ft at 11:30am Feb 9 Observed: 7.61 ft at 11:45am Feb 9 Observed: 7.6 ft at 12:00pm Feb 9 Observed: 7.59 ft at 12:15pm Feb 9 Graph Created (1:55pm Feb 9, 2010) Observed USGS--Water Resources of the United States GRSA2 (plotting HGIRG) Gage 0 Datum: n/a Latest observed value: 7.59 ft at 12:15 PM AST 9-Feb-2010. Flood Stage is 11.0 ft. Stage (ft) Flow (kcfs)
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NOTE: Gauge reading may be affected by ice.

NOTE: Forecasts for the Gulkana River at Sourdough are issued routinely year-round.

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Upstream Gauge - at Paxson Lake Outlet Upstream Gauge Downstream Gauge Downstream Gauge - at Richardson Highway Bridge

Flood Categories (in feet)
Moderate Flood Stage:12
Flood Stage:11
Action Stage:9.5

Historical Crests
(1) 16.03 ft on 05/07/1976
(2) 12.00 ft on 10/10/2006
(3) 11.26 ft on 09/12/1990
(4) 10.88 ft on 05/04/1989
(5) 10.48 ft on 08/26/2006
Show More Historical Crests

Low Water Records
Currently none available.

Gulkana River at Sourdough location map

Flood Impacts Collapse
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
12.0 Stage associated with flow (15200 cfs) having a recurrence interval of 20-40 years; moderate flooding would be expected on this and nearby streams
11.0 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

About This Location Expand

Other Data Sources:
U.S. Geological Survey (USGS) Data and Site Info for Sourdough

Additional Information Collapse
30 Day Graphs with 10, 50, and 90 percent of normal plots
Special Rules for the Gulkana National Wild River (BLM)

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) 266-5102
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