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Hydrograph River at a Glance Download
Big Wood River near Ketchum Stage (ft)Flow (cfs)Observed: 6.01 ft at 3:15AM Apr 15, 2024Observed: 6.01 ft at 3:30AM Apr 15, 2024Observed: 6.01 ft at 3:45AM Apr 15, 2024Observed: 6 ft at 4:00AM Apr 15, 2024Observed: 6 ft at 4:15AM Apr 15, 2024Observed: 5.99 ft at 4:30AM Apr 15, 2024Observed: 6 ft at 4:45AM Apr 15, 2024Observed: 5.99 ft at 5:00AM Apr 15, 2024Observed: 5.98 ft at 5:15AM Apr 15, 2024Observed: 5.99 ft at 5:30AM Apr 15, 2024Observed: 5.98 ft at 5:45AM Apr 15, 2024Observed: 6 ft at 6:00AM Apr 15, 2024Observed: 5.99 ft at 6:15AM Apr 15, 2024Observed: 5.98 ft at 6:30AM Apr 15, 2024Observed: 5.97 ft at 6:45AM Apr 15, 2024Observed: 5.98 ft at 7:00AM Apr 15, 2024Observed: 5.99 ft at 7:15AM Apr 15, 2024Observed: 5.97 ft at 7:30AM Apr 15, 2024Observed: 5.97 ft at 7:45AM Apr 15, 2024Observed: 5.97 ft at 8:00AM Apr 15, 2024Observed: 5.96 ft at 8:15AM Apr 15, 2024Observed: 5.96 ft at 8:30AM Apr 15, 2024Observed: 5.96 ft at 8:45AM Apr 15, 2024Observed: 5.95 ft at 9:00AM Apr 15, 2024Observed: 5.95 ft at 9:15AM Apr 15, 2024Observed: 5.95 ft at 9:30AM Apr 15, 2024Observed: 5.95 ft at 9:45AM Apr 15, 2024Observed: 5.94 ft at 10:00AM Apr 15, 2024Observed: 5.95 ft at 10:15AM Apr 15, 2024Observed: 5.94 ft at 10:30AM Apr 15, 2024Observed: 5.95 ft at 10:45AM Apr 15, 2024Observed: 5.93 ft at 11:00AM Apr 15, 2024Observed: 5.93 ft at 11:15AM Apr 15, 2024Observed: 5.93 ft at 11:30AM Apr 15, 2024Observed: 5.94 ft at 11:45AM Apr 15, 2024Observed: 5.94 ft at 12:00PM Apr 15, 2024Observed: 5.93 ft at 12:15PM Apr 15, 2024Observed: 5.93 ft at 12:30PM Apr 15, 2024Observed: 5.92 ft at 12:45PM Apr 15, 2024Observed: 5.94 ft at 1:00PM Apr 15, 2024Observed: 5.93 ft at 1:15PM Apr 15, 2024Observed: 5.92 ft at 1:30PM Apr 15, 2024Observed: 5.92 ft at 1:45PM Apr 15, 2024Observed: 5.93 ft at 2:00PM Apr 15, 2024Observed: 5.92 ft at 2:15PM Apr 15, 2024Observed: 5.92 ft at 2:30PM Apr 15, 2024Observed: 5.91 ft at 2:45PM Apr 15, 2024Observed: 5.91 ft at 3:00PM Apr 15, 2024Observed: 5.93 ft at 3:15PM Apr 15, 2024Observed: 5.92 ft at 3:30PM Apr 15, 2024Observed: 5.93 ft at 3:45PM Apr 15, 2024Observed: 5.92 ft at 4:00PM Apr 15, 2024Observed: 5.93 ft at 4:15PM Apr 15, 2024Observed: 5.94 ft at 4:30PM Apr 15, 2024Observed: 5.93 ft at 4:45PM Apr 15, 2024Observed: 5.94 ft at 5:00PM Apr 15, 2024Observed: 5.94 ft at 5:15PM Apr 15, 2024Observed: 5.95 ft at 5:30PM Apr 15, 2024Observed: 5.96 ft at 5:45PM Apr 15, 2024Observed: 5.95 ft at 6:00PM Apr 15, 2024Observed: 5.97 ft at 6:15PM Apr 15, 2024Observed: 5.96 ft at 6:30PM Apr 15, 2024Observed: 5.97 ft at 6:45PM Apr 15, 2024Observed: 5.99 ft at 7:00PM Apr 15, 2024Observed: 5.98 ft at 7:15PM Apr 15, 2024Observed: 5.99 ft at 7:30PM Apr 15, 2024Observed: 6 ft at 7:45PM Apr 15, 2024Observed: 6.01 ft at 8:00PM Apr 15, 2024Observed: 6.02 ft at 8:15PM Apr 15, 2024Observed: 6.01 ft at 8:30PM Apr 15, 2024Observed: 6.02 ft at 8:45PM Apr 15, 2024Observed: 6.02 ft at 9:00PM Apr 15, 2024Highest Observation: 6.05 ft at 9:15PM Apr 15, 2024Observed: 6.04 ft at 9:30PM Apr 15, 2024Observed: 6.02 ft at 9:45PM Apr 15, 2024Observed: 6.03 ft at 10:00PM Apr 15, 2024Observed: 6.04 ft at 10:15PM Apr 15, 2024Observed: 6.04 ft at 10:30PM Apr 15, 2024Highest Observation: 6.05 ft at 10:45PM Apr 15, 2024Observed: 6.04 ft at 11:00PM Apr 15, 2024Observed: 6.04 ft at 11:15PM Apr 15, 2024Highest Observation: 6.05 ft at 11:30PM Apr 15, 2024Observed: 6.04 ft at 11:45PM Apr 15, 2024Observed: 6.04 ft at 12:00AM Apr 16, 2024Observed: 6.04 ft at 12:15AM Apr 16, 2024Observed: 6.04 ft at 12:30AM Apr 16, 2024Observed: 6.02 ft at 12:45AM Apr 16, 2024Observed: 6.02 ft at 1:00AM Apr 16, 2024Observed: 6.03 ft at 1:15AM Apr 16, 2024Observed: 6.02 ft at 1:30AM Apr 16, 2024Observed: 6.03 ft at 1:45AM Apr 16, 2024Observed: 6.02 ft at 2:00AM Apr 16, 2024Observed: 6.01 ft at 2:15AM Apr 16, 2024Observed: 6 ft at 2:30AM Apr 16, 2024Observed: 6.01 ft at 2:45AM Apr 16, 2024Observed: 6.01 ft at 3:00AM Apr 16, 2024Observed: 6 ft at 3:15AM Apr 16, 2024Observed: 5.99 ft at 3:30AM Apr 16, 2024Observed: 5.99 ft at 3:45AM Apr 16, 2024Observed: 5.97 ft at 5:00AM Apr 16, 2024Observed: 5.97 ft at 5:15AM Apr 16, 2024Observed: 5.97 ft at 5:30AM Apr 16, 2024Observed: 5.98 ft at 5:45AM Apr 16, 2024Observed: 5.97 ft at 6:00AM Apr 16, 2024Observed: 5.97 ft at 6:15AM Apr 16, 2024Observed: 5.97 ft at 6:30AM Apr 16, 2024Observed: 5.97 ft at 6:45AM Apr 16, 2024Observed: 5.97 ft at 7:00AM Apr 16, 2024Observed: 5.96 ft at 7:15AM Apr 16, 2024Observed: 5.95 ft at 7:30AM Apr 16, 2024Observed: 5.95 ft at 7:45AM Apr 16, 2024Observed: 5.95 ft at 8:00AM Apr 16, 2024Observed: 5.95 ft at 8:15AM Apr 16, 2024Observed: 5.94 ft at 8:30AM Apr 16, 2024Observed: 5.94 ft at 8:45AM Apr 16, 2024Observed: 5.94 ft at 9:00AM Apr 16, 2024Observed: 5.94 ft at 9:15AM Apr 16, 2024Observed: 5.94 ft at 9:30AM Apr 16, 2024Observed: 5.93 ft at 9:45AM Apr 16, 2024Observed: 5.92 ft at 10:00AM Apr 16, 2024Observed: 5.93 ft at 10:15AM Apr 16, 2024Observed: 5.94 ft at 10:30AM Apr 16, 2024Observed: 5.92 ft at 10:45AM Apr 16, 2024Observed: 5.92 ft at 11:00AM Apr 16, 2024Observed: 5.92 ft at 11:15AM Apr 16, 2024Observed: 5.92 ft at 11:30AM Apr 16, 2024Observed: 5.92 ft at 11:45AM Apr 16, 2024Observed: 5.91 ft at 12:00PM Apr 16, 2024Observed: 5.91 ft at 12:15PM Apr 16, 2024Observed: 5.93 ft at 12:30PM Apr 16, 2024Observed: 5.91 ft at 12:45PM Apr 16, 2024Observed: 5.91 ft at 1:00PM Apr 16, 2024Observed: 5.92 ft at 1:15PM Apr 16, 2024Observed: 5.91 ft at 1:30PM Apr 16, 2024Observed: 5.92 ft at 1:45PM Apr 16, 2024Observed: 5.92 ft at 2:00PM Apr 16, 2024Observed: 5.92 ft at 2:15PM Apr 16, 2024Observed: 5.93 ft at 2:30PM Apr 16, 2024Observed: 5.93 ft at 2:45PM Apr 16, 2024Observed: 5.94 ft at 3:00PM Apr 16, 2024Observed: 5.93 ft at 3:15PM Apr 16, 2024Observed: 5.94 ft at 3:30PM Apr 16, 2024Observed: 5.93 ft at 3:45PM Apr 16, 2024Observed: 5.93 ft at 4:00PM Apr 16, 2024Observed: 5.94 ft at 4:15PM Apr 16, 2024Observed: 5.94 ft at 4:30PM Apr 16, 2024Observed: 5.94 ft at 4:45PM Apr 16, 2024Observed: 5.95 ft at 5:00PM Apr 16, 2024Observed: 5.96 ft at 5:15PM Apr 16, 2024Observed: 5.96 ft at 5:30PM Apr 16, 2024Observed: 5.95 ft at 5:45PM Apr 16, 2024Observed: 5.96 ft at 6:00PM Apr 16, 2024Observed: 5.98 ft at 6:15PM Apr 16, 2024Observed: 5.98 ft at 6:30PM Apr 16, 2024Observed: 5.98 ft at 6:45PM Apr 16, 2024Observed: 5.98 ft at 7:00PM Apr 16, 2024Observed: 6 ft at 7:15PM Apr 16, 2024Observed: 5.99 ft at 7:30PM Apr 16, 2024Observed: 6 ft at 7:45PM Apr 16, 2024Observed: 6.01 ft at 8:00PM Apr 16, 2024Observed: 6.01 ft at 8:15PM Apr 16, 2024Observed: 6.02 ft at 8:30PM Apr 16, 2024Observed: 6.03 ft at 8:45PM Apr 16, 2024Observed: 6.04 ft at 9:00PM Apr 16, 2024Observed: 6.02 ft at 9:15PM Apr 16, 2024Observed: 6.03 ft at 9:30PM Apr 16, 2024Observed: 6.03 ft at 9:45PM Apr 16, 2024Observed: 6.04 ft at 10:00PM Apr 16, 2024Observed: 6.04 ft at 10:15PM Apr 16, 2024Observed: 6.04 ft at 10:30PM Apr 16, 2024Observed: 6.03 ft at 10:45PM Apr 16, 2024Observed: 6.02 ft at 11:00PM Apr 16, 2024Observed: 6.03 ft at 11:15PM Apr 16, 2024Observed: 6.01 ft at 11:30PM Apr 16, 2024Observed: 6.02 ft at 11:45PM Apr 16, 2024Observed: 6.03 ft at 12:00AM Apr 17, 2024Observed: 6.01 ft at 12:15AM Apr 17, 2024Observed: 6.01 ft at 12:30AM Apr 17, 2024Observed: 6.02 ft at 12:45AM Apr 17, 2024Observed: 6 ft at 1:00AM Apr 17, 2024Observed: 6 ft at 1:15AM Apr 17, 2024Observed: 6.02 ft at 1:30AM Apr 17, 2024Observed: 6 ft at 1:45AM Apr 17, 2024Observed: 6 ft at 2:00AM Apr 17, 2024Observed: 6 ft at 2:15AM Apr 17, 2024Observed: 5.99 ft at 2:30AM Apr 17, 2024Observed: 5.99 ft at 2:45AM Apr 17, 2024Observed: 5.99 ft at 3:00AM Apr 17, 2024Observed: 5.99 ft at 3:15AM Apr 17, 2024Observed: 5.98 ft at 3:30AM Apr 17, 2024Observed: 5.98 ft at 3:45AM Apr 17, 2024Observed: 5.98 ft at 4:00AM Apr 17, 2024Observed: 5.98 ft at 4:15AM Apr 17, 2024Observed: 5.97 ft at 4:30AM Apr 17, 2024Observed: 5.97 ft at 4:45AM Apr 17, 2024Observed: 5.96 ft at 5:00AM Apr 17, 2024Observed: 5.97 ft at 5:15AM Apr 17, 2024Observed: 5.97 ft at 5:30AM Apr 17, 2024Observed: 5.97 ft at 5:45AM Apr 17, 2024Observed: 5.96 ft at 6:00AM Apr 17, 2024Observed: 5.95 ft at 6:15AM Apr 17, 2024Observed: 5.96 ft at 6:30AM Apr 17, 2024Observed: 5.96 ft at 6:45AM Apr 17, 2024Observed: 5.96 ft at 7:00AM Apr 17, 2024Observed: 5.94 ft at 7:15AM Apr 17, 2024Observed: 5.95 ft at 7:30AM Apr 17, 2024Observed: 5.94 ft at 7:45AM Apr 17, 2024Observed: 5.95 ft at 8:00AM Apr 17, 2024Observed: 5.94 ft at 8:15AM Apr 17, 2024Observed: 5.93 ft at 8:30AM Apr 17, 2024Observed: 5.93 ft at 8:45AM Apr 17, 2024Observed: 5.94 ft at 9:00AM Apr 17, 2024Observed: 5.94 ft at 9:15AM Apr 17, 2024Observed: 5.94 ft at 9:30AM Apr 17, 2024Observed: 5.93 ft at 9:45AM Apr 17, 2024Observed: 5.93 ft at 10:00AM Apr 17, 2024Observed: 5.91 ft at 10:15AM Apr 17, 2024Observed: 5.92 ft at 10:30AM Apr 17, 2024Observed: 5.93 ft at 10:45AM Apr 17, 2024Observed: 5.91 ft at 11:00AM Apr 17, 2024Observed: 5.91 ft at 11:15AM Apr 17, 2024Observed: 5.91 ft at 11:30AM Apr 17, 2024Observed: 5.9 ft at 11:45AM Apr 17, 2024Observed: 5.91 ft at 12:00PM Apr 17, 2024Observed: 5.91 ft at 12:15PM Apr 17, 2024Observed: 5.91 ft at 12:30PM Apr 17, 2024Observed: 5.91 ft at 12:45PM Apr 17, 2024Observed: 5.9 ft at 1:00PM Apr 17, 2024Observed: 5.91 ft at 1:15PM Apr 17, 2024Observed: 5.9 ft at 1:30PM Apr 17, 2024Observed: 5.9 ft at 1:45PM Apr 17, 2024Observed: 5.89 ft at 2:00PM Apr 17, 2024Observed: 5.9 ft at 2:15PM Apr 17, 2024Observed: 5.9 ft at 2:30PM Apr 17, 2024Observed: 5.89 ft at 2:45PM Apr 17, 2024Observed: 5.9 ft at 3:00PM Apr 17, 2024Observed: 5.9 ft at 3:15PM Apr 17, 2024Observed: 5.9 ft at 3:30PM Apr 17, 2024Observed: 5.9 ft at 3:45PM Apr 17, 2024Observed: 5.9 ft at 4:00PM Apr 17, 2024Observed: 5.9 ft at 4:15PM Apr 17, 2024Observed: 5.92 ft at 4:30PM Apr 17, 2024Observed: 5.91 ft at 4:45PM Apr 17, 2024Observed: 5.91 ft at 5:00PM Apr 17, 2024Observed: 5.91 ft at 5:15PM Apr 17, 2024Observed: 5.91 ft at 5:30PM Apr 17, 2024Observed: 5.92 ft at 5:45PM Apr 17, 2024Observed: 5.9 ft at 6:00PM Apr 17, 2024Observed: 5.91 ft at 6:15PM Apr 17, 2024Observed: 5.93 ft at 6:30PM Apr 17, 2024Observed: 5.92 ft at 6:45PM Apr 17, 2024Observed: 5.93 ft at 7:00PM Apr 17, 2024Observed: 5.92 ft at 7:15PM Apr 17, 2024Observed: 5.93 ft at 7:30PM Apr 17, 2024Observed: 5.94 ft at 7:45PM Apr 17, 2024Observed: 5.93 ft at 8:00PM Apr 17, 2024Observed: 5.93 ft at 8:15PM Apr 17, 2024Observed: 5.93 ft at 8:30PM Apr 17, 2024Observed: 5.93 ft at 8:45PM Apr 17, 2024Observed: 5.92 ft at 9:00PM Apr 17, 2024Observed: 5.92 ft at 9:15PM Apr 17, 2024Observed: 5.93 ft at 9:30PM Apr 17, 2024Observed: 5.93 ft at 9:45PM Apr 17, 2024Observed: 5.92 ft at 10:00PM Apr 17, 2024Observed: 5.91 ft at 10:15PM Apr 17, 2024Observed: 5.91 ft at 10:30PM Apr 17, 2024Observed: 5.92 ft at 10:45PM Apr 17, 2024Observed: 5.92 ft at 11:00PM Apr 17, 2024Observed: 5.92 ft at 11:15PM Apr 17, 2024Observed: 5.91 ft at 11:30PM Apr 17, 2024Observed: 5.91 ft at 11:45PM Apr 17, 2024Observed: 5.9 ft at 12:00AM Apr 18, 2024Observed: 5.9 ft at 12:15AM Apr 18, 2024Observed: 5.91 ft at 12:30AM Apr 18, 2024Observed: 5.89 ft at 12:45AM Apr 18, 2024Observed: 5.9 ft at 1:00AM Apr 18, 2024Observed: 5.89 ft at 1:15AM Apr 18, 2024Observed: 5.89 ft at 1:30AM Apr 18, 2024Observed: 5.89 ft at 1:45AM Apr 18, 2024Highest Forecast: 5.8 ft 6:00AM Apr 18, 2024Forecast: 5.77 ft 12:00PM Apr 18, 2024Forecast: 5.74 ft 6:00PM Apr 18, 2024Forecast: 5.71 ft 12:00AM Apr 19, 2024Forecast: 5.69 ft 6:00AM Apr 19, 2024Forecast: 5.67 ft 12:00PM Apr 19, 2024Forecast: 5.65 ft 6:00PM Apr 19, 2024Forecast: 5.63 ft 12:00AM Apr 20, 2024Forecast: 5.61 ft 6:00AM Apr 20, 2024Forecast: 5.6 ft 12:00PM Apr 20, 2024Forecast: 5.58 ft 6:00PM Apr 20, 2024Forecast: 5.57 ft 12:00AM Apr 21, 2024Forecast: 5.56 ft 6:00AM Apr 21, 2024Forecast: 5.55 ft 12:00PM Apr 21, 2024Forecast: 5.54 ft 6:00PM Apr 21, 2024Forecast: 5.54 ft 12:00AM Apr 22, 2024Forecast: 5.54 ft 6:00AM Apr 22, 2024Forecast: 5.54 ft 12:00PM Apr 22, 2024Forecast: 5.54 ft 6:00PM Apr 22, 2024Forecast: 5.53 ft 12:00AM Apr 23, 2024Forecast: 5.53 ft 6:00AM Apr 23, 2024Forecast: 5.53 ft 12:00PM Apr 23, 2024Forecast: 5.53 ft 6:00PM Apr 23, 2024Forecast: 5.53 ft 12:00AM Apr 24, 2024Forecast: 5.55 ft 6:00AM Apr 24, 2024Forecast: 5.6 ft 12:00PM Apr 24, 2024Forecast: 5.63 ft 6:00PM Apr 24, 2024Forecast: 5.69 ft 12:00AM Apr 25, 2024USGS--Water Resources of the United StatesBWKI1(plotting HGIRZ) Graph Created (3:03AM Apr 18, 2024)ObservedForecast (issued 4:36PM Apr 17)Latest observed value: 5.89 ft at 1:45 AM MDT 18-Apr-2024. Flood Stage is 8 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Stage may be affected by ice during winter months.

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) 7.52 ft on 06/12/2022
(5) 7.49 ft on 06/06/2019
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 7.52 ft on 06/12/2022
(2) 6.08 ft on 06/05/2021
(3) 6.52 ft on 05/31/2020
(4) 7.49 ft on 06/06/2019
(5) 7.35 ft on 05/27/2018
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
KML Image
Gauge LocationGauge Map Marker
 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 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 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 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 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

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

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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