Gulkana River at Sourdough
Future / Actual / Minor
OWP 2.0 WWA Modal Title
01/11/2021, 10:04 PM UTC through 01/11/2021, 10:04 PM UTC
Sender
Sent
- Warning: no valid ratings curve available. Transformations to and from FEET/CFS/KCFS will not happen.
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CATEGORY STAGE Minor Flooding 11 ft Action 9.5 ft Reliability of the Forecast:
NOTE: Forecasts are issued routinely during the warm season, and as needed at other times of the year.
Flood stage levels are based on recurrence intervals and may not be representative of local impacts.
National Water Model Hydrograph
Official NWS streamflow forecasts are produced by NWS hydrologic forecasters for river gauge locations using hydrologic models which are calibrated to that location. This process considers additional guidance and information, including local expertise and experience, to produce the best forecast possible. The NWM output provides supplemental guidance to NWS forecasters and should not be considered an official NWS river forecast.
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 |
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 |
| 6. | 9.58 ft | on 05-11-2015 |
| 7. | -9999.00 ft | on 05-04-2014 |
| 8. | 14.62 ft | on 05-30-2013 |
| 9. | 10.29 ft | on 06-14-2012 |
| 10. | 8.63 ft | on 05-23-2011 |
| 11. | 8.41 ft | on 07-25-2010 |
| 12. | 14.64 ft | on 05-05-2009 |
| 13. | 8.91 ft | on 07-30-2008 |
| 14. | 12.00 ft | on 10-10-2006 |
| 15. | 10.48 ft | on 08-26-2006 |
| 16. | 7.44 ft | on 09-14-2005 |
| 17. | 9.50 ft | on 05-10-2004 |
| 18. | 9.41 ft | on 08-22-2002 |
| 19. | 8.43 ft | on 05-25-2001 |
| 20. | 8.33 ft | on 06-08-2000 |
| 21. | 8.48 ft | on 05-17-1999 |
| 22. | 7.28 ft | on 08-10-1998 |
| 23. | 9.36 ft | on 06-10-1997 |
| 24. | 8.69 ft | on 05-04-1993 |
| 25. | 10.08 ft | on 06-03-1992 |
| 26. | 8.94 ft | on 05-24-1991 |
| 27. | 11.26 ft | on 09-12-1990 |
| 28. | 10.88 ft | on 05-04-1989 |
| 29. | 9.54 ft | on 05-09-1978 |
| 30. | 10.07 ft | on 06-02-1977 |
| 31. | 16.03 ft | on 05-07-1976 |
| 32. | 9.66 ft | on 06-04-1975 |
| 33. | 8.86 ft | on 05-25-1974 |
| 34. | 9.92 ft | on 05-16-1973 |
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 |
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 |
| 6. | 10.88 ft | on 05-04-1989 |
| 7. | 10.75 ft | on 06-13-2018 |
| 8. | 10.48 ft | on 08-26-2006 |
| 9. | 10.29 ft | on 06-14-2012 |
| 10. | 10.09 ft | on 06-24-2020 |
| 11. | 10.08 ft | on 06-03-1992 |
| 12. | 10.07 ft | on 06-02-1977 |
| 13. | 9.92 ft | on 05-16-1973 |
| 14. | 9.66 ft | on 06-04-1975 |
| 15. | 9.58 ft | on 05-11-2015 |
| 16. | 9.54 ft | on 05-09-1978 |
| 17. | 9.50 ft | on 05-10-2004 |
| 18. | 9.41 ft | on 08-22-2002 |
| 19. | 9.36 ft | on 06-10-1997 |
| 20. | 8.94 ft | on 05-24-1991 |
| 21. | 8.91 ft | on 07-30-2008 |
| 22. | 8.86 ft | on 05-25-1974 |
| 23. | 8.85 ft | on 05-02-2017 |
| 24. | 8.69 ft | on 05-04-1993 |
| 25. | 8.63 ft | on 05-23-2011 |
| 26. | 8.57 ft | on 05-09-2019 |
| 27. | 8.52 ft | on 07-26-2016 |
| 28. | 8.48 ft | on 05-17-1999 |
| 29. | 8.43 ft | on 05-25-2001 |
| 30. | 8.41 ft | on 07-25-2010 |
| 31. | 8.33 ft | on 06-08-2000 |
| 32. | 7.44 ft | on 09-14-2005 |
| 33. | 7.28 ft | on 08-10-1998 |
| 34. | -9999.00 ft | on 05-04-2014 |
Vertical Datum Table
| type | STND | NAVD88 |
|---|---|---|
| major Flooding | N/A | N/A |
| moderate Flooding | N/A | N/A |
| minor Flooding | 11.00 ft | 1863.10 ft |
| action | 9.50 ft | 1861.60 ft |
| Latest Value | 6.14 ft | 1858.24 ft |
| Gauge Zero | 0.00 ft | 1852.10 ft |
Unique Local Info
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.