Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at https://water.weather.gov will be replaced by the National Water Prediction Service (NWPS), with a target of March 2024. Existing AHPS content and features will be preserved and expanded within NWPS.

Experimental National Water Center Products: The National Hydrologic Discussion, Area Hydrologic Discussion, and Flood Hazard Outlook, and real-time geospatial services depicting River Forecast Center and National Water Model forecasts, continue to be accessible via https://www.weather.gov/owp/operations, as described in the StoryMap here.

Weather Forecast Office Pocatello, ID

Northwest River Forecast Center

Hydrograph

River at a Glance

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Printable Image About this graph Tabular Data (UTC) Tabular Data (MDT) Datum: Not Available Metadata

NOTE: Forecasts for the Snake River near Blackfoot (Tilden Bridge-Ft. Hall) are issued routinely year-round.

Default Hydrograph Scale to Flood Categories   Return to Area Map

Upstream Gauge

Downstream Gauge

Flood Categories (in feet) Major Flood Stage: 0 Moderate Flood Stage: 0 Flood Stage: 11 Action Stage: 10.2 Low Stage (in feet): -9999 Historic Crests (1) 14.80 ft on 06/18/1918 (2) 14.80 ft on 06/18/1997 (3) 12.67 ft on 06/22/1917 (4) 12.63 ft on 06/08/1914 (5) 12.32 ft on 05/18/1984 Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 5.47 ft on 09/13/2022 (2) 6.59 ft on 08/05/2021 (3) 8.42 ft on 07/02/2020 (4) 9.82 ft on 04/28/2019 (5) 10.57 ft on 06/04/2018 Show More Recent Crests (P): Preliminary values subject to further review. Low Water Records (1) 0.80 ft on 11/10/1934

Zoom Level:16 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

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11	Minor flooding in low-lying areas and croplands along with seep and ponding near the river. Residents along the river may experience water levels that impact their property.
10.2	Low-lying areas and croplands may experience seep and ponding near the river. Residents along the river may experience water levels nearing impact levels.

About This Location

Latitude: 43.125278° N, Longitude: 112.518889° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 11 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 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks Other 4399.83 ft 4300.83 ft   Current/Historical Observations: U.S. Geological Survey (USGS) Data and Site Info for Blackfoot (Tilden Bridge-Ft. Hall)

Additional Information

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 36100 CFS or 13.38 ft 50   Year Peak Flood 38600 CFS or 13.70 ft 100 Year Peak Flood 40600 CFS or 13.93 ft 200 Year Peak Flood 42300 CFS or 14.13 ft 500 Year Peak Flood 44000 CFS or 14.32 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