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Hydrograph River at a Glance Download
Big Wood River near Ketchum Stage (ft)Flow (cfs)Observed: 5.06 ft at 5:00AM Mar 30, 2020Observed: 5.06 ft at 5:15AM Mar 30, 2020Observed: 5.06 ft at 5:30AM Mar 30, 2020Observed: 5.06 ft at 5:45AM Mar 30, 2020Observed: 5.06 ft at 6:00AM Mar 30, 2020Observed: 5.06 ft at 6:15AM Mar 30, 2020Observed: 5.06 ft at 6:30AM Mar 30, 2020Observed: 5.07 ft at 6:45AM Mar 30, 2020Observed: 5.06 ft at 7:00AM Mar 30, 2020Observed: 5.06 ft at 7:15AM Mar 30, 2020Observed: 5.06 ft at 7:30AM Mar 30, 2020Observed: 5.06 ft at 7:45AM Mar 30, 2020Observed: 5.06 ft at 8:00AM Mar 30, 2020Observed: 5.06 ft at 8:15AM Mar 30, 2020Observed: 5.06 ft at 8:30AM Mar 30, 2020Observed: 5.06 ft at 8:45AM Mar 30, 2020Observed: 5.06 ft at 9:00AM Mar 30, 2020Observed: 5.06 ft at 9:15AM Mar 30, 2020Observed: 5.06 ft at 9:30AM Mar 30, 2020Observed: 5.06 ft at 9:45AM Mar 30, 2020Observed: 5.06 ft at 10:00AM Mar 30, 2020Observed: 5.06 ft at 10:15AM Mar 30, 2020Observed: 5.06 ft at 10:30AM Mar 30, 2020Observed: 5.06 ft at 10:45AM Mar 30, 2020Observed: 5.06 ft at 11:00AM Mar 30, 2020Observed: 5.06 ft at 11:15AM Mar 30, 2020Observed: 5.06 ft at 11:30AM Mar 30, 2020Observed: 5.06 ft at 11:45AM Mar 30, 2020Observed: 5.06 ft at 12:00PM Mar 30, 2020Observed: 5.06 ft at 12:15PM Mar 30, 2020Observed: 5.06 ft at 12:30PM Mar 30, 2020Observed: 5.06 ft at 12:45PM Mar 30, 2020Observed: 5.06 ft at 1:00PM Mar 30, 2020Observed: 5.06 ft at 1:15PM Mar 30, 2020Observed: 5.06 ft at 1:30PM Mar 30, 2020Observed: 5.07 ft at 1:45PM Mar 30, 2020Observed: 5.06 ft at 2:00PM Mar 30, 2020Observed: 5.07 ft at 2:15PM Mar 30, 2020Observed: 5.06 ft at 2:30PM Mar 30, 2020Observed: 5.07 ft at 2:45PM Mar 30, 2020Observed: 5.07 ft at 3:00PM Mar 30, 2020Observed: 5.07 ft at 3:15PM Mar 30, 2020Observed: 5.07 ft at 3:30PM Mar 30, 2020Observed: 5.08 ft at 3:45PM Mar 30, 2020Observed: 5.07 ft at 4:00PM Mar 30, 2020Observed: 5.08 ft at 4:15PM Mar 30, 2020Observed: 5.08 ft at 4:30PM Mar 30, 2020Observed: 5.08 ft at 4:45PM Mar 30, 2020Observed: 5.07 ft at 5:00PM Mar 30, 2020Observed: 5.07 ft at 5:15PM Mar 30, 2020Observed: 5.07 ft at 5:30PM Mar 30, 2020Observed: 5.08 ft at 5:45PM Mar 30, 2020Observed: 5.08 ft at 6:00PM Mar 30, 2020Observed: 5.08 ft at 6:15PM Mar 30, 2020Observed: 5.08 ft at 6:30PM Mar 30, 2020Observed: 5.08 ft at 6:45PM Mar 30, 2020Observed: 5.08 ft at 7:00PM Mar 30, 2020Observed: 5.08 ft at 7:15PM Mar 30, 2020Observed: 5.08 ft at 7:30PM Mar 30, 2020Observed: 5.07 ft at 7:45PM Mar 30, 2020Observed: 5.08 ft at 8:00PM Mar 30, 2020Observed: 5.07 ft at 8:15PM Mar 30, 2020Observed: 5.08 ft at 8:30PM Mar 30, 2020Observed: 5.07 ft at 8:45PM Mar 30, 2020Observed: 5.07 ft at 9:00PM Mar 30, 2020Observed: 5.07 ft at 9:15PM Mar 30, 2020Observed: 5.07 ft at 9:30PM Mar 30, 2020Observed: 5.08 ft at 9:45PM Mar 30, 2020Observed: 5.07 ft at 10:00PM Mar 30, 2020Observed: 5.07 ft at 10:15PM Mar 30, 2020Observed: 5.08 ft at 10:30PM Mar 30, 2020Observed: 5.08 ft at 10:45PM Mar 30, 2020Observed: 5.08 ft at 11:00PM Mar 30, 2020Observed: 5.08 ft at 11:15PM Mar 30, 2020Observed: 5.08 ft at 11:30PM Mar 30, 2020Observed: 5.08 ft at 11:45PM Mar 30, 2020Observed: 5.08 ft at 12:00AM Mar 31, 2020Observed: 5.08 ft at 12:15AM Mar 31, 2020Observed: 5.08 ft at 12:30AM Mar 31, 2020Observed: 5.08 ft at 12:45AM Mar 31, 2020Observed: 5.08 ft at 1:00AM Mar 31, 2020Observed: 5.08 ft at 1:15AM Mar 31, 2020Observed: 5.08 ft at 1:30AM Mar 31, 2020Observed: 5.08 ft at 1:45AM Mar 31, 2020Observed: 5.08 ft at 2:00AM Mar 31, 2020Observed: 5.08 ft at 2:15AM Mar 31, 2020Observed: 5.08 ft at 2:30AM Mar 31, 2020Observed: 5.08 ft at 2:45AM Mar 31, 2020Observed: 5.09 ft at 3:00AM Mar 31, 2020Observed: 5.08 ft at 3:15AM Mar 31, 2020Observed: 5.08 ft at 3:30AM Mar 31, 2020Observed: 5.08 ft at 3:45AM Mar 31, 2020Observed: 5.08 ft at 4:00AM Mar 31, 2020Observed: 5.08 ft at 4:15AM Mar 31, 2020Observed: 5.07 ft at 4:30AM Mar 31, 2020Observed: 5.08 ft at 4:45AM Mar 31, 2020Observed: 5.08 ft at 5:00AM Mar 31, 2020Observed: 5.08 ft at 5:15AM Mar 31, 2020Observed: 5.07 ft at 5:30AM Mar 31, 2020Observed: 5.08 ft at 5:45AM Mar 31, 2020Observed: 5.08 ft at 6:00AM Mar 31, 2020Observed: 5.08 ft at 6:15AM Mar 31, 2020Observed: 5.08 ft at 6:30AM Mar 31, 2020Observed: 5.08 ft at 6:45AM Mar 31, 2020Observed: 5.08 ft at 7:00AM Mar 31, 2020Observed: 5.08 ft at 7:15AM Mar 31, 2020Observed: 5.08 ft at 7:30AM Mar 31, 2020Observed: 5.08 ft at 7:45AM Mar 31, 2020Observed: 5.08 ft at 8:00AM Mar 31, 2020Observed: 5.08 ft at 8:15AM Mar 31, 2020Observed: 5.08 ft at 8:30AM Mar 31, 2020Observed: 5.08 ft at 8:45AM Mar 31, 2020Observed: 5.08 ft at 9:00AM Mar 31, 2020Observed: 5.08 ft at 9:15AM Mar 31, 2020Observed: 5.08 ft at 9:30AM Mar 31, 2020Observed: 5.08 ft at 9:45AM Mar 31, 2020Observed: 5.09 ft at 10:00AM Mar 31, 2020Observed: 5.09 ft at 10:15AM Mar 31, 2020Observed: 5.09 ft at 10:30AM Mar 31, 2020Observed: 5.09 ft at 10:45AM Mar 31, 2020Observed: 5.09 ft at 11:00AM Mar 31, 2020Observed: 5.09 ft at 11:15AM Mar 31, 2020Observed: 5.09 ft at 11:30AM Mar 31, 2020Observed: 5.09 ft at 11:45AM Mar 31, 2020Observed: 5.09 ft at 12:00PM Mar 31, 2020Observed: 5.09 ft at 12:15PM Mar 31, 2020Observed: 5.09 ft at 12:30PM Mar 31, 2020Observed: 5.09 ft at 12:45PM Mar 31, 2020Highest Observation: 5.1 ft at 1:00PM Mar 31, 2020Observed: 5.09 ft at 1:15PM Mar 31, 2020Highest Observation: 5.1 ft at 1:30PM Mar 31, 2020Highest Observation: 5.1 ft at 1:45PM Mar 31, 2020Highest Observation: 5.1 ft at 2:00PM Mar 31, 2020Observed: 5.09 ft at 2:15PM Mar 31, 2020Highest Observation: 5.1 ft at 2:30PM Mar 31, 2020Highest Observation: 5.1 ft at 2:45PM Mar 31, 2020Highest Observation: 5.1 ft at 3:00PM Mar 31, 2020Highest Observation: 5.1 ft at 3:15PM Mar 31, 2020Highest Observation: 5.1 ft at 3:30PM Mar 31, 2020Highest Observation: 5.1 ft at 3:45PM Mar 31, 2020Highest Observation: 5.1 ft at 4:00PM Mar 31, 2020Highest Observation: 5.1 ft at 4:15PM Mar 31, 2020USGS--Water Resources of the United StatesBWKI1(plotting HGIRZ) Graph Created (4:48AM Apr 2, 2020)ObservedLatest observed value: 5.1 ft at 4:15 PM MDT 31-Mar-2020. Flood Stage is 8 ft
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About this graph
Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Gauge reading may be affected by ice during freezing weather from November to April.

Reliability of the Forecast: Forecast data shown here are guidance values only. Please refer to your local NWS office.

NOTE: Forecasts for the Big Wood River near Ketchum are issued routinely year-round.

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Upstream Gauge - near Ketchum Upstream Gauge Downstream Gauge Downstream Gauge - near Ketchum
Flood Categories (in feet)
Major Flood Stage: 10
Moderate Flood Stage: 9
Flood Stage: 8
Action Stage: 7.5
Low Stage (in feet): -9999

Historic Crests
(1) 9.89 ft on 05/07/2017
(2) 8.74 ft on 04/26/2012
(3) 7.61 ft on 06/24/2011
(4) 7.35 ft on 05/27/2018
(5) 7.17 ft on 06/06/2016
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 7.35 ft on 05/27/2018
(2) 9.89 ft on 05/07/2017
(3) 7.17 ft on 06/06/2016
(4) 6.45 ft on 06/01/2015
(5) 6.75 ft on 05/29/2014
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 2.08 ft on 03/18/1966

For more information on your flood risk go to www.floodsmart.gov.

Zoom Level:16
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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 Collapse
If you notice any errors in the below information, please contact our Webmaster
10 or 5355 cfs... Widespread lowland flooding from Easley Hot Springs dowriver to Ketchum. Numerous properties will have water inundation. Sun Peak Picnic area flooded; Idaho Highwyat 75 may have erosion problems in several locations.
9 or 3075 cfs... Widespread lowland flooding from Easley Hot Springs downriver to Ketchum. Many properties will have water inundation. Sun Peak Picnic area flooded; Idaho Highway 75 may have bank erosion from Cottonwood Lane to Glassford Drive.
8 or 1559 cfs... Lowland flooding from near the SNRA building downriver into Ketchum. Property near Chocolate Gulch Road downstream to Ketchum will have flooding; Sun Peak Picnic Area flooded; Fox Creek Trailhead may be closed
7.5 or 1038 cfs... Near bankfull from Easley Hot Springs downriver to Ketchum.
About This Location Collapse

Latitude: 43.786456° N, Longitude: 114.425150° W, Horizontal Datum: NAD27

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 8 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 6240 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:

Additional Information Collapse
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 1890 CFS or 8.32 ft
50   Year Peak Flood 2130 CFS or 8.41 ft
100 Year Peak Flood 2370 CFS or 8.57 ft
200 Year Peak Flood 2620 CFS or 8.73 ft
500 Year Peak Flood 2950 CFS or 8.92 ft

 
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Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
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
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Page last modified: 1-Mar-2019 12:33 AM
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