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Web Portal Changes: The Advanced Hydrologic Prediction Service (AHPS) hosted at 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, as described in the StoryMap here.

Hydrograph River at a Glance Download
Boise River above Lucky Peak Dam Adjusted Discharge (kcfs)Observed: 10.66 kcfs at 11:59PM May 31, 2023Highest Observation: 10.83 kcfs at 11:59PM Jun 01, 2023Observed: 10.27 kcfs at 11:59PM Jun 02, 2023Observed: 10.25 kcfs at 11:59PM Jun 03, 2023Observed: 10.11 kcfs at 11:59PM Jun 04, 2023Observed: 10.06 kcfs at 11:59PM Jun 05, 2023Observed: 9.74 kcfs at 11:59PM Jun 06, 2023Observed: 9.69 kcfs at 11:59PM Jun 07, 2023Observed: 9.77 kcfs at 11:59PM Jun 08, 2023Highest Forecast: 9.85 kcfs 12:00AM Jun 10, 2023Forecast: 9.76 kcfs 6:00AM Jun 10, 2023Forecast: 9.53 kcfs 12:00PM Jun 10, 2023Forecast: 9.3 kcfs 6:00PM Jun 10, 2023Forecast: 9.1 kcfs 12:00AM Jun 11, 2023Forecast: 8.87 kcfs 6:00AM Jun 11, 2023Forecast: 8.6 kcfs 12:00PM Jun 11, 2023Forecast: 8.39 kcfs 6:00PM Jun 11, 2023Forecast: 8.25 kcfs 12:00AM Jun 12, 2023Forecast: 8.12 kcfs 6:00AM Jun 12, 2023Forecast: 7.97 kcfs 12:00PM Jun 12, 2023Forecast: 7.99 kcfs 6:00PM Jun 12, 2023Forecast: 8.15 kcfs 12:00AM Jun 13, 2023Forecast: 8.27 kcfs 6:00AM Jun 13, 2023Forecast: 8.27 kcfs 12:00PM Jun 13, 2023Forecast: 8.29 kcfs 6:00PM Jun 13, 2023Forecast: 8.35 kcfs 12:00AM Jun 14, 2023Forecast: 8.32 kcfs 6:00AM Jun 14, 2023Forecast: 8.17 kcfs 12:00PM Jun 14, 2023Forecast: 7.93 kcfs 6:00PM Jun 14, 2023Forecast: 7.66 kcfs 12:00AM Jun 15, 2023Forecast: 7.38 kcfs 6:00AM Jun 15, 2023Forecast: 7.09 kcfs 12:00PM Jun 15, 2023Forecast: 6.82 kcfs 6:00PM Jun 15, 2023Forecast: 6.58 kcfs 12:00AM Jun 16, 2023Forecast: 6.36 kcfs 6:00AM Jun 16, 2023Forecast: 6.16 kcfs 12:00PM Jun 16, 2023Forecast: 5.98 kcfs 6:00PM Jun 16, 2023Forecast: 5.81 kcfs 12:00AM Jun 17, 2023Forecast: 5.65 kcfs 6:00AM Jun 17, 2023Forecast: 5.51 kcfs 12:00PM Jun 17, 2023Forecast: 5.37 kcfs 6:00PM Jun 17, 2023Forecast: 5.25 kcfs 12:00AM Jun 18, 2023Forecast: 5.13 kcfs 6:00AM Jun 18, 2023Forecast: 5.03 kcfs 12:00PM Jun 18, 2023Forecast: 4.94 kcfs 6:00PM Jun 18, 2023Forecast: 4.84 kcfs 12:00AM Jun 19, 2023Forecast: 4.83 kcfs 6:00AM Jun 19, 2023LUCI1(plotting QAIRZ) Graph Created (7:15PM Jun 9, 2023)ObservedForecast (issued 3:49PM Jun 9)Latest observed value: 9.77 kcfs at 11:59 PM MDT 8-Jun-2023.
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Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: Not Available
NOTE: The blue dots represent the estimated daily average natural inflow to the Boise River system above Lucky Peak Dam. The 7 day forecast is for total Boise River natural inflow above Lucky Peak Dam. This includes the Boise River South Fork, Middle Fork, North Fork, Mores Creek and other ungauged small tributaries.

NOTE: Forecasts for the Boise River above Lucky Peak Dam are issued routinely year-round.

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Upstream Locations Upstream Gauge Downstream Gauge Downstream Locations
Flood Categories (in KCFS)
Not Available

Historic Crests
(1) 24,109 cfs on 05/07/2017
(2) 22,786 cfs on 04/27/2012
(3) 18,787 cfs on 05/15/2011
(4) 17,685 cfs on 06/05/2010
(5) 17,394 cfs on 04/09/2019
(6) 11,316 cfs on 04/13/2016
(7) 9,977 cfs on 05/09/2018
(8) 9,773 cfs on 05/28/2014
(9) 7,517 cfs on 05/14/2013
(10) 5,076 cfs on 05/06/2015

(P): Preliminary values subject to further review.

Recent Crests
(1) 17,394 cfs on 04/09/2019
(2) 9,977 cfs on 05/09/2018
(3) 24,109 cfs on 05/07/2017
(4) 11,316 cfs on 04/13/2016
(5) 5,076 cfs on 05/06/2015
(6) 9,773 cfs on 05/28/2014
(7) 7,517 cfs on 05/14/2013
(8) 22,786 cfs on 04/27/2012
(9) 18,787 cfs on 05/15/2011
(10) 17,685 cfs on 06/05/2010

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:13
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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.
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(1) Boise River Basin above Lucky Peak Dam
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Latitude: 43.525556° N, Longitude: 116.055278° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS flow Not Available Not Available Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(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 Not Available Not Available  

Current/Historical Observations:

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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
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Boise Weather Forecast Office
NIFC Building 3807
Boise, ID 83705-5354
(208) 334-9860
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