Portneuf River at Pocatello
Future / Actual / Minor
OWP 2.0 WWA Modal Title
01/11/2021, 10:04 PM UTC through 01/11/2021, 10:04 PM UTC
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- Warning: no valid ratings curve available. Transformations to and from FEET/CFS/KCFS will not happen.
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Observed (OBS) 04/04/2025 4:00 PM MDTOfficial Forecast (FCST) 04/04/2025 3:40 PM MDTRecord: 13.8 ftCATEGORY STAGE 
Major Flooding 11 ft Moderate Flooding 10 ft Minor Flooding 8.5 ft Action 8 ft Reliability of the Forecast:
NOTE: Forecasts are issued routinely year-round.
Stage may be affected by ice during winter months.
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
- 10 - Significant flooding of agricultural land will occur from the Inkom and Blackrock area. Lowland flooding will occur along sections of the river in Pocatello from Portneuf Gap to the Cheyenne Avenue Bridge and downstream of the concrete channel beginning at Sacajawea Park.
- 9.4 - Water will encroach around sitting benches near the river at the Pacific Recycling Trailhead.
- 9.15 - Flooding of low lying agricultural land and pasture will occur in the Inkom and Blackrock area. Lowland flooding is likely along sections of the river between Portneuf Gap and the Cheyenne Avenue Bridge in Pocatello.
Gauge Info
| Coordinates | 42.8716, -112.468 |
| RFC | NWRFC |
| State | ID |
| WFO | PIH |
| County | Bannock |
| Data Provider(s) | |
| USGS | USGS - Water Resources of the United States |
| USGS | 13075500 |
Gauge Location
Recent Crests
| 1. | 11.14 ft | on 05-30-2023 |
| 2. | 5.43 ft | on 05-08-2022 |
| 3. | 5.31 ft | on 03-20-2021 |
| 4. | 6.97 ft | on 05-02-2020 |
| 5. | 9.26 ft | on 04-27-2019 |
Recent Crests
| 1. | 11.14 ft | on 05-30-2023 | |
| 2. | 5.43 ft | on 05-08-2022 | |
| 3. | 5.31 ft | on 03-20-2021 | |
| 4. | 6.97 ft | on 05-02-2020 | |
| 5. | 9.26 ft | on 04-27-2019 | |
| 6. | 8.66 ft | on 04-30-2018 | |
| 7. | 9.83 ft | on 05-14-2017 | 1 |
| 8. | 7.33 ft | on 04-15-2016 | |
| 9. | 5.13 ft | on 02-09-2015 | |
| 10. | 7.35 ft | on 02-16-2014 | |
| 11. | 6.08 ft | on 09-03-2013 | |
| 12. | 8.06 ft | on 01-22-2012 | |
| 13. | 9.95 ft | on 05-27-2011 | |
| 14. | 6.30 ft | on 04-23-2010 | |
| 15. | 7.44 ft | on 06-18-2009 | |
| 16. | 6.14 ft | on 05-08-2008 | |
| 17. | 7.76 ft | on 02-12-2007 | |
| 18. | 10.52 ft | on 05-03-2006 | |
| 19. | 7.36 ft | on 05-18-2005 | |
| 20. | 5.68 ft | on 03-26-2004 | |
| 21. | 5.23 ft | on 04-16-2002 | |
| 22. | 9.14 ft | on 05-20-1997 | |
| 23. | 9.07 ft | on 05-31-1996 | |
| 24. | 6.78 ft | on 02-28-1994 | |
| 25. | 8.30 ft | on 05-18-1993 | |
| 26. | 6.96 ft | on 04-22-1989 | |
| 27. | 9.41 ft | on 04-26-1986 | |
| 28. | 13.85 ft | on 05-17-1984 | |
| 29. | 11.19 ft | on 05-31-1983 | |
| 30. | 9.00 ft | on 05-13-1976 | |
| 31. | 9.40 ft | on 05-19-1975 | |
| 32. | 8.32 ft | on 05-11-1974 | |
| 33. | 8.19 ft | on 05-09-1972 | |
| 34. | 9.59 ft | on 05-14-1971 | |
| 35. | 7.62 ft | on 04-25-1969 | |
| 36. | 5.31 ft | on 03-20-0021 |
Historic Crests
| 1. | 13.85 ft | on 05-17-1984 |
| 2. | 11.19 ft | on 05-31-1983 |
| 3. | 11.14 ft | on 05-30-2023 |
| 4. | 10.52 ft | on 05-03-2006 |
| 5. | 9.95 ft | on 05-27-2011 |
Historic Crests
| 1. | 13.85 ft | on 05-17-1984 | |
| 2. | 11.19 ft | on 05-31-1983 | |
| 3. | 11.14 ft | on 05-30-2023 | |
| 4. | 10.52 ft | on 05-03-2006 | |
| 5. | 9.95 ft | on 05-27-2011 | |
| 6. | 9.83 ft | on 05-14-2017 | 1 |
| 7. | 9.59 ft | on 05-14-1971 | |
| 8. | 9.41 ft | on 04-26-1986 | |
| 9. | 9.40 ft | on 05-19-1975 | |
| 10. | 9.26 ft | on 04-27-2019 | |
| 11. | 9.14 ft | on 05-20-1997 | |
| 12. | 9.07 ft | on 05-31-1996 | |
| 13. | 9.00 ft | on 05-13-1976 | |
| 14. | 8.66 ft | on 04-30-2018 | |
| 15. | 8.32 ft | on 05-11-1974 | |
| 16. | 8.30 ft | on 05-18-1993 | |
| 17. | 8.19 ft | on 05-09-1972 | |
| 18. | 8.06 ft | on 01-22-2012 | |
| 19. | 7.76 ft | on 02-12-2007 | |
| 20. | 7.62 ft | on 04-25-1969 | |
| 21. | 7.44 ft | on 06-18-2009 | |
| 22. | 7.36 ft | on 05-18-2005 | |
| 23. | 7.35 ft | on 02-16-2014 | |
| 24. | 7.33 ft | on 04-15-2016 | |
| 25. | 6.97 ft | on 05-02-2020 | |
| 26. | 6.96 ft | on 04-22-1989 | |
| 27. | 6.78 ft | on 02-28-1994 | |
| 28. | 6.30 ft | on 04-23-2010 | |
| 29. | 6.14 ft | on 05-08-2008 | |
| 30. | 6.08 ft | on 09-03-2013 | |
| 31. | 5.68 ft | on 03-26-2004 | |
| 32. | 5.43 ft | on 05-08-2022 | |
| 33. | 5.31 ft | on 03-20-0021 | |
| 34. | 5.31 ft | on 03-20-2021 | |
| 35. | 5.23 ft | on 04-16-2002 | |
| 36. | 5.13 ft | on 02-09-2015 |
Vertical Datum Table
| type | NGVD29 |
|---|---|
| major Flooding | 4429.41 ft |
| moderate Flooding | 4428.41 ft |
| minor Flooding | 4426.91 ft |
| action | 4426.41 ft |
| Latest Value | 4424.83 ft |
| Gauge Zero | 4418.41 ft |
Unique Local Info
Portneuf USGS Webcam  Â
Historical Peak Flows     (Scroll to Streamflow Statistics for more years)
USGS Historical Peak Flows Explanation
Graphical View of Historical Peak Flows and Gage AnalysisÂ
25 Â Â Year Peak Flood 2010 CFS or 11.97 ft
50 Â Year Peak Flood 2440 CFS or 12.69 ft
100 Year Peak Flood 2930 CFS or 13.27 ft
200 Year Peak Flood 3490 CFS or 13.82 ft
500 Year Peak Flood 4360 CFS or 14.54 ft
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.