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Hydrograph River at a Glance Download Inundation
Mapping
Boise River at Boise (Glenwood Bridge) River Discharge (cfs)Stage (ft)Observed: 473 cfs at 4:30AM May 14, 2022Observed: 477 cfs at 4:45AM May 14, 2022Observed: 473 cfs at 5:00AM May 14, 2022Observed: 473 cfs at 5:15AM May 14, 2022Observed: 473 cfs at 5:30AM May 14, 2022Observed: 468 cfs at 5:45AM May 14, 2022Observed: 477 cfs at 6:00AM May 14, 2022Observed: 477 cfs at 6:15AM May 14, 2022Observed: 477 cfs at 6:30AM May 14, 2022Observed: 473 cfs at 6:45AM May 14, 2022Observed: 473 cfs at 7:00AM May 14, 2022Observed: 473 cfs at 7:15AM May 14, 2022Observed: 477 cfs at 7:30AM May 14, 2022Observed: 473 cfs at 7:45AM May 14, 2022Observed: 473 cfs at 8:00AM May 14, 2022Observed: 473 cfs at 8:15AM May 14, 2022Observed: 477 cfs at 8:30AM May 14, 2022Observed: 477 cfs at 8:45AM May 14, 2022Observed: 473 cfs at 9:00AM May 14, 2022Observed: 473 cfs at 9:15AM May 14, 2022Observed: 473 cfs at 9:30AM May 14, 2022Observed: 482 cfs at 9:45AM May 14, 2022Observed: 477 cfs at 10:00AM May 14, 2022Observed: 477 cfs at 10:15AM May 14, 2022Observed: 473 cfs at 10:30AM May 14, 2022Observed: 482 cfs at 10:45AM May 14, 2022Observed: 477 cfs at 11:00AM May 14, 2022Observed: 482 cfs at 11:15AM May 14, 2022Observed: 477 cfs at 11:30AM May 14, 2022Observed: 482 cfs at 11:45AM May 14, 2022Observed: 482 cfs at 12:00PM May 14, 2022Observed: 482 cfs at 12:15PM May 14, 2022Observed: 477 cfs at 12:30PM May 14, 2022Observed: 482 cfs at 12:45PM May 14, 2022Observed: 491 cfs at 1:00PM May 14, 2022Observed: 496 cfs at 1:15PM May 14, 2022Observed: 491 cfs at 1:30PM May 14, 2022Observed: 491 cfs at 1:45PM May 14, 2022Observed: 487 cfs at 2:00PM May 14, 2022Observed: 477 cfs at 2:15PM May 14, 2022Observed: 473 cfs at 2:30PM May 14, 2022Observed: 459 cfs at 2:45PM May 14, 2022Observed: 464 cfs at 3:00PM May 14, 2022Observed: 477 cfs at 3:15PM May 14, 2022Observed: 496 cfs at 3:30PM May 14, 2022Observed: 510 cfs at 3:45PM May 14, 2022Observed: 515 cfs at 4:00PM May 14, 2022Observed: 515 cfs at 4:15PM May 14, 2022Observed: 515 cfs at 4:30PM May 14, 2022Observed: 515 cfs at 4:45PM May 14, 2022Observed: 491 cfs at 5:00PM May 14, 2022Observed: 482 cfs at 5:15PM May 14, 2022Observed: 468 cfs at 5:30PM May 14, 2022Observed: 473 cfs at 5:45PM May 14, 2022Observed: 468 cfs at 6:00PM May 14, 2022Observed: 473 cfs at 6:15PM May 14, 2022Observed: 468 cfs at 6:30PM May 14, 2022Observed: 468 cfs at 6:45PM May 14, 2022Observed: 464 cfs at 7:00PM May 14, 2022Observed: 468 cfs at 7:15PM May 14, 2022Observed: 473 cfs at 7:30PM May 14, 2022Observed: 473 cfs at 7:45PM May 14, 2022Observed: 468 cfs at 8:00PM May 14, 2022Observed: 468 cfs at 8:15PM May 14, 2022Observed: 468 cfs at 8:30PM May 14, 2022Observed: 468 cfs at 8:45PM May 14, 2022Observed: 468 cfs at 9:00PM May 14, 2022Observed: 464 cfs at 9:15PM May 14, 2022Observed: 468 cfs at 9:30PM May 14, 2022Observed: 464 cfs at 9:45PM May 14, 2022Observed: 464 cfs at 10:00PM May 14, 2022Observed: 464 cfs at 10:15PM May 14, 2022Observed: 468 cfs at 10:30PM May 14, 2022Observed: 468 cfs at 10:45PM May 14, 2022Observed: 464 cfs at 11:15PM May 14, 2022Observed: 468 cfs at 11:30PM May 14, 2022Observed: 468 cfs at 11:45PM May 14, 2022Observed: 468 cfs at 12:00AM May 15, 2022Observed: 473 cfs at 12:15AM May 15, 2022Observed: 473 cfs at 12:30AM May 15, 2022Observed: 473 cfs at 12:45AM May 15, 2022Observed: 468 cfs at 1:00AM May 15, 2022Observed: 477 cfs at 1:15AM May 15, 2022Observed: 473 cfs at 1:30AM May 15, 2022Observed: 473 cfs at 1:45AM May 15, 2022Observed: 468 cfs at 2:00AM May 15, 2022Observed: 473 cfs at 2:15AM May 15, 2022Observed: 473 cfs at 2:30AM May 15, 2022Observed: 477 cfs at 2:45AM May 15, 2022Observed: 482 cfs at 3:00AM May 15, 2022Observed: 477 cfs at 3:15AM May 15, 2022Observed: 473 cfs at 3:30AM May 15, 2022Observed: 473 cfs at 3:45AM May 15, 2022Observed: 473 cfs at 4:00AM May 15, 2022Observed: 473 cfs at 4:15AM May 15, 2022Observed: 473 cfs at 4:30AM May 15, 2022Observed: 468 cfs at 4:45AM May 15, 2022Observed: 473 cfs at 5:00AM May 15, 2022Observed: 468 cfs at 5:15AM May 15, 2022Observed: 473 cfs at 5:30AM May 15, 2022Observed: 473 cfs at 5:45AM May 15, 2022Observed: 473 cfs at 6:00AM May 15, 2022Observed: 473 cfs at 6:15AM May 15, 2022Observed: 473 cfs at 6:30AM May 15, 2022Observed: 477 cfs at 6:45AM May 15, 2022Observed: 473 cfs at 7:00AM May 15, 2022Observed: 473 cfs at 7:15AM May 15, 2022Observed: 468 cfs at 7:30AM May 15, 2022Observed: 468 cfs at 7:45AM May 15, 2022Observed: 468 cfs at 8:00AM May 15, 2022Observed: 468 cfs at 8:15AM May 15, 2022Observed: 468 cfs at 8:30AM May 15, 2022Observed: 473 cfs at 8:45AM May 15, 2022Observed: 473 cfs at 9:00AM May 15, 2022Observed: 473 cfs at 9:15AM May 15, 2022Observed: 473 cfs at 9:30AM May 15, 2022Observed: 473 cfs at 9:45AM May 15, 2022Observed: 473 cfs at 10:00AM May 15, 2022Observed: 473 cfs at 10:15AM May 15, 2022Observed: 477 cfs at 10:30AM May 15, 2022Observed: 482 cfs at 10:45AM May 15, 2022Observed: 482 cfs at 11:00AM May 15, 2022Observed: 482 cfs at 11:15AM May 15, 2022Observed: 482 cfs at 11:30AM May 15, 2022Observed: 477 cfs at 11:45AM May 15, 2022Observed: 477 cfs at 12:00PM May 15, 2022Observed: 477 cfs at 12:15PM May 15, 2022Observed: 468 cfs at 12:30PM May 15, 2022Observed: 477 cfs at 12:45PM May 15, 2022Observed: 473 cfs at 1:00PM May 15, 2022Observed: 464 cfs at 1:15PM May 15, 2022Observed: 459 cfs at 1:30PM May 15, 2022Observed: 468 cfs at 1:45PM May 15, 2022Observed: 468 cfs at 2:00PM May 15, 2022Observed: 473 cfs at 2:15PM May 15, 2022Observed: 473 cfs at 2:30PM May 15, 2022Observed: 468 cfs at 2:45PM May 15, 2022Observed: 477 cfs at 3:00PM May 15, 2022Observed: 473 cfs at 3:15PM May 15, 2022Observed: 473 cfs at 3:30PM May 15, 2022Observed: 473 cfs at 3:45PM May 15, 2022Observed: 473 cfs at 4:00PM May 15, 2022Observed: 473 cfs at 4:15PM May 15, 2022Observed: 473 cfs at 4:30PM May 15, 2022Observed: 468 cfs at 4:45PM May 15, 2022Observed: 464 cfs at 5:00PM May 15, 2022Observed: 468 cfs at 5:15PM May 15, 2022Observed: 464 cfs at 5:30PM May 15, 2022Observed: 464 cfs at 5:45PM May 15, 2022Observed: 468 cfs at 6:00PM May 15, 2022Observed: 468 cfs at 6:15PM May 15, 2022Observed: 464 cfs at 6:30PM May 15, 2022Observed: 459 cfs at 6:45PM May 15, 2022Observed: 459 cfs at 7:00PM May 15, 2022Observed: 464 cfs at 7:15PM May 15, 2022Observed: 464 cfs at 7:30PM May 15, 2022Observed: 459 cfs at 7:45PM May 15, 2022Observed: 464 cfs at 8:00PM May 15, 2022Observed: 459 cfs at 8:15PM May 15, 2022Observed: 459 cfs at 8:30PM May 15, 2022Observed: 459 cfs at 8:45PM May 15, 2022Observed: 455 cfs at 9:00PM May 15, 2022Observed: 459 cfs at 9:15PM May 15, 2022Observed: 464 cfs at 9:30PM May 15, 2022Observed: 459 cfs at 9:45PM May 15, 2022Observed: 459 cfs at 10:00PM May 15, 2022Observed: 473 cfs at 10:15PM May 15, 2022Observed: 468 cfs at 10:30PM May 15, 2022Observed: 468 cfs at 10:45PM May 15, 2022Observed: 473 cfs at 11:15PM May 15, 2022Observed: 468 cfs at 11:30PM May 15, 2022Observed: 468 cfs at 11:45PM May 15, 2022Observed: 459 cfs at 12:00AM May 16, 2022Observed: 459 cfs at 12:15AM May 16, 2022Observed: 459 cfs at 12:30AM May 16, 2022Observed: 459 cfs at 12:45AM May 16, 2022Observed: 464 cfs at 1:00AM May 16, 2022Observed: 464 cfs at 1:15AM May 16, 2022Observed: 459 cfs at 1:30AM May 16, 2022Observed: 468 cfs at 1:45AM May 16, 2022Observed: 459 cfs at 2:00AM May 16, 2022Observed: 459 cfs at 2:15AM May 16, 2022Observed: 455 cfs at 2:30AM May 16, 2022Observed: 450 cfs at 2:45AM May 16, 2022Observed: 464 cfs at 3:00AM May 16, 2022Observed: 459 cfs at 3:15AM May 16, 2022Observed: 459 cfs at 3:30AM May 16, 2022Observed: 468 cfs at 3:45AM May 16, 2022Observed: 473 cfs at 4:00AM May 16, 2022Observed: 473 cfs at 4:15AM May 16, 2022Observed: 468 cfs at 4:30AM May 16, 2022Observed: 468 cfs at 4:45AM May 16, 2022Observed: 473 cfs at 5:00AM May 16, 2022Observed: 468 cfs at 5:15AM May 16, 2022Observed: 464 cfs at 5:30AM May 16, 2022Observed: 468 cfs at 5:45AM May 16, 2022Observed: 468 cfs at 6:00AM May 16, 2022Observed: 468 cfs at 6:15AM May 16, 2022Observed: 468 cfs at 6:30AM May 16, 2022Observed: 468 cfs at 6:45AM May 16, 2022Observed: 473 cfs at 10:00AM May 16, 2022Observed: 477 cfs at 10:15AM May 16, 2022Observed: 468 cfs at 10:30AM May 16, 2022Observed: 464 cfs at 10:45AM May 16, 2022Observed: 473 cfs at 11:00AM May 16, 2022Observed: 468 cfs at 11:15AM May 16, 2022Observed: 468 cfs at 11:30AM May 16, 2022Observed: 464 cfs at 11:45AM May 16, 2022Observed: 459 cfs at 12:00PM May 16, 2022Observed: 455 cfs at 12:15PM May 16, 2022Observed: 455 cfs at 12:30PM May 16, 2022Observed: 459 cfs at 12:45PM May 16, 2022Observed: 459 cfs at 1:00PM May 16, 2022Observed: 459 cfs at 1:15PM May 16, 2022Observed: 459 cfs at 1:30PM May 16, 2022Observed: 455 cfs at 1:45PM May 16, 2022Observed: 459 cfs at 2:00PM May 16, 2022Observed: 450 cfs at 2:15PM May 16, 2022Observed: 446 cfs at 2:30PM May 16, 2022Observed: 441 cfs at 2:45PM May 16, 2022Observed: 433 cfs at 3:00PM May 16, 2022Observed: 424 cfs at 3:15PM May 16, 2022Observed: 420 cfs at 3:30PM May 16, 2022Observed: 420 cfs at 3:45PM May 16, 2022Observed: 424 cfs at 4:00PM May 16, 2022Observed: 428 cfs at 4:15PM May 16, 2022Observed: 433 cfs at 4:30PM May 16, 2022Observed: 437 cfs at 4:45PM May 16, 2022Observed: 441 cfs at 5:00PM May 16, 2022Observed: 446 cfs at 5:15PM May 16, 2022Observed: 455 cfs at 5:30PM May 16, 2022Observed: 468 cfs at 5:45PM May 16, 2022Observed: 491 cfs at 6:00PM May 16, 2022Observed: 501 cfs at 6:15PM May 16, 2022Observed: 515 cfs at 6:30PM May 16, 2022Observed: 525 cfs at 6:45PM May 16, 2022Highest Observation: 535 cfs at 7:00PM May 16, 2022Observed: 525 cfs at 7:15PM May 16, 2022Observed: 530 cfs at 7:30PM May 16, 2022Highest Observation: 535 cfs at 7:45PM May 16, 2022Observed: 520 cfs at 8:00PM May 16, 2022Observed: 520 cfs at 8:15PM May 16, 2022Observed: 501 cfs at 8:30PM May 16, 2022Observed: 491 cfs at 8:45PM May 16, 2022Observed: 482 cfs at 9:00PM May 16, 2022Observed: 477 cfs at 9:15PM May 16, 2022Observed: 473 cfs at 9:30PM May 16, 2022Observed: 468 cfs at 9:45PM May 16, 2022Observed: 468 cfs at 10:00PM May 16, 2022Observed: 464 cfs at 10:15PM May 16, 2022Observed: 468 cfs at 10:30PM May 16, 2022Observed: 468 cfs at 10:45PM May 16, 2022Observed: 464 cfs at 11:15PM May 16, 2022Observed: 468 cfs at 11:30PM May 16, 2022Observed: 468 cfs at 11:45PM May 16, 2022Observed: 464 cfs at 12:00AM May 17, 2022Observed: 464 cfs at 12:15AM May 17, 2022Observed: 464 cfs at 12:30AM May 17, 2022Observed: 464 cfs at 12:45AM May 17, 2022Observed: 468 cfs at 1:00AM May 17, 2022Observed: 459 cfs at 1:15AM May 17, 2022Observed: 464 cfs at 1:30AM May 17, 2022Observed: 464 cfs at 1:45AM May 17, 2022Observed: 459 cfs at 2:00AM May 17, 2022Observed: 455 cfs at 2:15AM May 17, 2022Observed: 459 cfs at 2:30AM May 17, 2022Observed: 459 cfs at 2:45AM May 17, 2022Observed: 455 cfs at 3:00AM May 17, 2022Observed: 455 cfs at 3:15AM May 17, 2022Observed: 450 cfs at 3:30AM May 17, 2022Observed: 455 cfs at 3:45AM May 17, 2022Forecast: 437 cfs 6:00AM May 17, 2022Forecast: 437 cfs 12:00PM May 17, 2022Forecast: 437 cfs 6:00PM May 17, 2022Forecast: 437 cfs 12:00AM May 18, 2022Forecast: 437 cfs 6:00AM May 18, 2022Forecast: 437 cfs 12:00PM May 18, 2022Forecast: 433 cfs 6:00PM May 18, 2022Forecast: 433 cfs 12:00AM May 19, 2022Forecast: 433 cfs 6:00AM May 19, 2022Forecast: 433 cfs 12:00PM May 19, 2022Forecast: 433 cfs 6:00PM May 19, 2022Forecast: 433 cfs 12:00AM May 20, 2022Forecast: 428 cfs 6:00AM May 20, 2022Forecast: 428 cfs 12:00PM May 20, 2022Forecast: 428 cfs 6:00PM May 20, 2022Forecast: 428 cfs 12:00AM May 21, 2022Forecast: 428 cfs 6:00AM May 21, 2022Forecast: 424 cfs 12:00PM May 21, 2022Forecast: 424 cfs 6:00PM May 21, 2022Forecast: 424 cfs 12:00AM May 22, 2022Forecast: 424 cfs 6:00AM May 22, 2022Forecast: 424 cfs 12:00PM May 22, 2022Forecast: 424 cfs 6:00PM May 22, 2022Forecast: 420 cfs 12:00AM May 23, 2022Forecast: 420 cfs 6:00AM May 23, 2022Forecast: 433 cfs 12:00PM May 23, 2022Forecast: 540 cfs 6:00PM May 23, 2022Highest Forecast: 657 cfs 12:00AM May 24, 2022USGS--Water Resources of the United StatesBIGI1(plotting QRIRZ) Graph Created (4:15AM May 17, 2022)ObservedForecast (issued 4:49PM May 16)Latest observed value: 455 cfs at 3:45 AM MDT 17-May-2022. Flood Flow is 7 kcfs
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About this graph
Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
Reliability of the Forecast: Based on current and forecast river, weather and reservoir conditions

NOTE: Forecasts for the Boise River at Boise (Glenwood Bridge) are issued routinely year-round.

Vertical datum height surveyed by the USGS

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Upstream Locations Upstream Gauge Downstream Gauge Downstream Locations
Flood Categories (in KCFS)
Major Flood Flow: 15
Moderate Flood Flow: 11
Flood Flow: 7
Action Flow: 6.5
Low Stage (in feet): -9999

Historic Crests
(1) 9,840 cfs on 06/13/1983
(2) 9,590 cfs on 06/06/2017
(3) 8,350 cfs on 05/31/1998
(4) 8,310 cfs on 05/05/2012
(5) 8,030 cfs on 06/07/1986
(6) 7,630 cfs on 06/29/1982
(7) 7,564 cfs on 06/06/1983
(8) 7,440 cfs on 04/30/2006
(9) 7,340 cfs on 05/06/2019
(10) 7,300 cfs on 03/27/1997
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 2,270 cfs on 05/22/2021
(2) 1,000 cfs on 04/30/2020
(3) 7,340 cfs on 05/06/2019
(4) 6,520 cfs on 05/28/2018
(5) 9,590 cfs on 06/06/2017
(6) 6,420 cfs on 04/11/2016
(7) 1,770 cfs on 05/19/2015
(8) 2,130 cfs on 03/31/2014
(9) 1,520 cfs on 05/21/2013
(10) 8,310 cfs on 05/05/2012
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

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

Zoom Level:13
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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
16000 Major flooding will occur near the river in Boise, Garden City, Eagle, Star, and Caldwell. Some residential areas in low lying areas near the river will be flooded with water entering some houses. A flood of this magnitude has not occurred on the Boise River since 1943. Most of the area within the 100 year flood plain, including many city parks near the river, will be underwater. Debris piling up on bridge crossings will cause additional flood damage.
12000 Flooding will occur in low areas and parkland adjacent to the river in Boise, Garden City, Eagle, Star, and Caldwell. Flooding of low lying residential streets in areas adjacent to the river is likely, especially on portions of Eagle Island. Debris damming on bridges crossing the river will occur and may cause water to spill over the road surfaces leading up to the bridge. Park Center Boulevard in southeast Boise will be flooded near the Park Center Pond.
10500 Flooding over Park Center Boulevard in southeast Boise near the Park Center Pond will occur. Flooding will occur in Municiple Park. Flooding near the river will occur in low areas of Boise, Garden City, Eagle, Star and Caldwell. Portions of Eagle Island will be submerged with flooding of residential property in low lying areas near the river likely. The water should remain below the level of most residential structures, but access in and out of some neighborhoods may be limited by high water.
9500 Flooding of low areas near the river in Boise, Garden City, Eagle, Star, and Caldwell will occur. Debris in the river will collect on bridges crossing the river. Water will cover portions of Warm Springs Golf Course in east Boise. The water may affect some residential property near the river, but should stay below the level of most residential structures. The river will spill over its banks between 45th and 47th Street in Garden City into the warehouse district.
8900 Large sections of the green belt will be submerged and severe bank erosion will occur. Flooding will occur in low areas close to the river in Boise, Garden City, Eagle and Caldwell, but the water should remain below the level of most residential areas. Water will seep into the Garden City warehouse district between 45th and 47th streets. Flooding will impact portions or Marianne Williams Park in east Boise.
8500 Large sections of the green belt will be submerged and severe bank erosion will occur. Flooding will occur in low areas close to the river in Boise, Garden City, Eagle and Caldwell, but the water should remain below the level of most residential areas. Water will begin seeping into the Garden City warehouse district between 45th and 47th streets.
8200 Large sections of the green belt will be submerged and severe bank erosion will occur. Flooding will occur in low areas close to the river in Boise, Garden City, Eagle and Caldwell, but the water should remain below the level of most residential areas. Water will begin seeping into the Garden City warehouse district between 45th and 47th streets.
7000 Large sections of the greenbelt path adjacent to the river will be submerged. Erosion of river banks will also become a significant problem. Debris in the river including small trees and logs may begin piling up at bridge crossings. Minor flooding will be observed on sections of Eagle Island and in other low spots near the river. Minor flooding will spread downstream to low areas near the river in Star and Caldwell.
6500 Large sections of the greenbelt path adjacent to the river will be submerged. Minor flooding may affect portions of Eagle Island.
4000 Water will begin seeping onto low spots on the greenbelt path next to the river especially near bridge underpasses.
About This Location Collapse

Latitude: 43.660556° N, Longitude: 116.279167° 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)
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 2600 ft 2610.4 ft  

Current/Historical Observations:

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NWS Information
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Boise Weather Forecast Office
NIFC Building 3807
Boise, ID 83705-5354
(208) 334-9860
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Page last modified: 2-Nov-2020 7:28 PM
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