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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: NGVD29 Metadata

NOTE: Stage may be affected by ice during winter months. NOTE: Forecasts are not available for the Big Wood River below Magic Dam. Only observed stages are available for this point.

Default Hydrograph Scale to Flood Categories   Return to Area Map

Upstream Gauge

Flood Categories (in feet) Major Flood Stage: 0 Moderate Flood Stage: 0 Flood Stage: 9 Action Stage: 8.5 Low Stage (in feet): -9999 Historic Crests (1) 15.68 ft on 04/26/1952 (2) 13.31 ft on 04/13/1943 (3) 11.89 ft on 03/31/2017 (4) 11.55 ft on 04/21/1938 (5) 10.69 ft on 05/31/1983 Show More Historic Crests (P): Preliminary values subject to further review. Recent Crests (1) 4.87 ft on 07/20/2022 (2) 4.66 ft on 06/04/2021 (3) 4.59 ft on 08/10/2020 (4) 7.90 ft on 06/04/2019 (5) 6.48 ft on 05/28/2018 Show More Recent Crests (P): Preliminary values subject to further review. Low Water Records Currently none available.

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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12	Major flooding will occur near Shoshone in Lincoln County and in the city of Gooding in Gooding County. The flooding will come from both the Big Wood and Little Wood Rivers with water crossing over land from the Big Wood River into the Little Wood River. Highway 75 in Lincoln County will be flooded where it crosses the Big Wood River. The Big and Little Wood Rivers will flood Highway 46 in Gooding County.
11	Water will spill from the Big Wood River over land upstream from Shoshone and enter the Little Wood River causing flooding in Lincoln and Gooding Counties on the Little Wood River. Floodwater will also spill over portions of the Highway 75 and Highway 46 where they cross the Big Wood River in Lincoln and Gooding Counties.
10.5	Water will reach the level of Highway 75 in Lincoln County and Highway 46 in Gooding County. Water will reach a stage of 9.0 feet at the Highway 46 bridge about 24 hours after exceeding a stage of 10.5 feet just below Magic Reservoir. Water will also spill from the Big Wood Channel over land through Cottonwood Slough and enter the Little Wood River upstream from Shoshone. Water will pond behind the railroad embankment near Shoshone.
9.5	Floodwater will spread downstream from Magic Reservoir along the banks of the Big Wood River in Lincoln and Gooding Counties. Floodwater will be about 1 foot below the surface of Highway 75 and Highway 46. Water levels between 8.0 and 8.5 feet will occur at the Highway 46 bridge north of Gooding about 24 hours after discharge reaches 5300 cfs at Magic Reservoir, with minor flooding occurring upstream from the bridge. This will be similar to the flooding, which occurred in 2006.
9	Floodwater will spread downstream from Magic Reservoir along the banks of the Big Wood River in Lincoln and Gooding Counties. Floodwater will be about 1 foot below the surface of Highway 75 and Highway 46. Water levels between 8.0 and 8.5 feet will occur at the Highway 46 bridge north of Gooding about 24 hours after discharge reaches 4669 cfs at Magic Reservoir, with minor flooding occurring upstream from the bridge. This will be similar to the flooding, which occurred in 2006.

About This Location

Latitude: 43.248078° N, Longitude: 114.356614° W, Horizontal Datum: NAD83/WGS84 River Stage Reference Frame Gauge Height Flood Stage Uses NWS stage 0 ft 9 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 4661.6 ft Not Available 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 Magic Dam

Additional Information

Big Wood River Flood Inundation Maps from the U.S. Army Corps of Engineers Gage Analysis

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