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Weather Forecast Office Pocatello, ID

Northwest River Forecast Center

Flood Warning

Flood Advisory

Hydrograph

River at a Glance

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Probability Information Weekly Chance of Exceeding Levels Chance of Exceeding Levels During Entire Period Short-term Probabilistic Guidance (Experimental) Not Available

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Printable Image About this graph Tabular Data (UTC) Tabular Data (MDT) Datum: NGVD29 Metadata

NOTE: Stage may be affected by ice during winter months. NOTE: Forecasts for the Portneuf River at Pocatello are issued routinely year-round.

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Upstream Gauge

Downstream Gauge

Flood Categories (in feet) Major Flood Stage: 11 Moderate Flood Stage: 10 Flood Stage: 8.5 Action Stage: 8 Low Stage (in feet): -9999 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 Show More Historic Crests (P): Preliminary values subject to further review. 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 Show More Recent Crests (P): Preliminary values subject to further review. Low Water Records Currently none available. For more information on your flood risk go to www.floodsmart.gov. Show FEMA's National Flood Hazard Layers FEMA's National Flood Hazard Layers not showing? Why aren't the FEMA National Flood Hazard Layers showing on the ESRI Map? Possible reasons: There are no FEMA National Flood Hazard Layers for the location which you are viewing on ESRI Maps. The FEMA Web Mapping Service (WMS) is down. Note: Your zoom level may have changed. ESRI's zoom levels must be between 14 and 16 to show National Flood Hazard layers.

Zoom Level:14 Legend FEMA Layer Gauge Location 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

If you notice any errors in the below information, please contact our Webmaster
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.
8.5	Sections of Sacajawea Park will be under water and the trail is usually closed at this level. Marsh Creek near Inkom may also be over its banks.
8	Water will encroach onto portions of the bike and walking trail next to the river in Sacajawea Park in Pocatello.
Photos (1) PIHI1_googleearth (2) PIHI1_map (3) PIHI1_gagehouse_surveycable (4) PIHI1_looking_upstream (5) PIHI1_looking_downstream (6) PIHI1_lookingstraightfromgage (7) PIHI1_portneuf_river_canal (8) PIHI1_portneuf_areal_canal (9) PIHI1

About This Location

Latitude: 42.871614° N, Longitude: 112.468206° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 8.5 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 4418.41 ft 4426.91 ft Older USGS topographic maps, NGVD29 benchmarks MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks Other Not Available Not Available   Current/Historical Observations: U.S. Geological Survey (USGS) Data and Site Info for Pocatello

Additional Information

Portneuf USGS Webcam    Historical Peak Flows     (Scroll to Streamflow Statistics for more years) USGS Historical Peak Flows Explanation Graphical View of Historical Peak Flows and Gage Analysis  25   Year Peak Flood 2010 CFS or 11.97 ft 50   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

Resources

Hydrologic Resources Text Products Past Precipitation Forecast Precipitation River Forecast Centers River Stage Summary Inundation Mapping Locations Grassy Lake Dam Upper Snake Teacups Bear Basin Teacups

Additional Resources Area Hydrographs NWS Precipitation and River Forecasting AHPS Iframes for Developers Mobile iNWS for emergency management NWRFC CBRFC ID NRCS Snow Survey NOHRSC Snow Information USGS Current Stream Conditions USGS Water Watch

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. NWS Information National Weather Service Pocatello Weather Forecast Office 1945 Beechcraft Ave Pocatello, ID 83204 (208) 232-9306 Ask Questions/Webmaster Page last modified: 2-Nov-2020 7:28 PM Disclaimer Credits Glossary Privacy Policy About Us Career Opportunities