Gulkana River at Sourdough

Last updated: Jul 20, 2025, 7:56 PM UTC
No watches, warnings or advisories are in effect for this area.

Flood Impacts 🅘

  • 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

Gauge Info

Coordinates 62.5208, -145.531
RFC APRFC
State AK
WFO AFC
County Copper River
Data Provider(s)
US Geological Survey USGS 15200280

Gauge Location

Recent Crests

1. 10.09 ft on 06-24-2020
2. 8.57 ft on 05-09-2019
3. 10.75 ft on 06-13-2018
4. 8.85 ft on 05-02-2017
5. 8.52 ft on 07-26-2016

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

Vertical Datum Table

type STND NAVD88
major Flooding N/AN/A
moderate Flooding N/AN/A
minor Flooding 11.00 ft1863.10 ft
action 9.50 ft1861.60 ft
Latest Value 6.14 ft1858.24 ft
Gauge Zero 0.00 ft1852.10 ft

Gauge Photos

Photo 1 of 4

Upstream at Sourdough Campground stage 10.07ft

Probability Information

Photo 1 of 2

Unique Local Info

Water Temperature Chart

Collaborative Agencies

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.

WFO Information

Weather Forecast Office
Anchorage
6930 Sand Lake Road
Anchorage, AK 99502
Official Homepage