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Hydrograph River at a Glance Download
North Branch Chicago River at Chicago (Grand Ave) Stage (ft)Observed: -2.56 ft at 11:30PM Oct 11, 2021Observed: -2.55 ft at 12:10AM Oct 12, 2021Observed: -2.59 ft at 12:50AM Oct 12, 2021Observed: -2.56 ft at 1:30AM Oct 12, 2021Observed: -2.55 ft at 2:10AM Oct 12, 2021Observed: -2.57 ft at 2:50AM Oct 12, 2021Observed: -2.57 ft at 3:10AM Oct 12, 2021Observed: -2.59 ft at 3:50AM Oct 12, 2021Observed: -2.6 ft at 4:10AM Oct 12, 2021Observed: -2.64 ft at 4:50AM Oct 12, 2021Observed: -2.64 ft at 5:10AM Oct 12, 2021Observed: -2.67 ft at 5:50AM Oct 12, 2021Observed: -2.67 ft at 6:10AM Oct 12, 2021Observed: -2.69 ft at 6:50AM Oct 12, 2021Observed: -2.74 ft at 7:10AM Oct 12, 2021Observed: -2.75 ft at 7:50AM Oct 12, 2021Observed: -2.71 ft at 8:10AM Oct 12, 2021Observed: -2.74 ft at 8:50AM Oct 12, 2021Observed: -2.75 ft at 9:10AM Oct 12, 2021Observed: -2.73 ft at 9:50AM Oct 12, 2021Observed: -2.6 ft at 10:30AM Oct 12, 2021Observed: -2.54 ft at 11:10AM Oct 12, 2021Observed: -2.49 ft at 11:50AM Oct 12, 2021Observed: -2.4 ft at 12:10PM Oct 12, 2021Observed: -2.4 ft at 12:50PM Oct 12, 2021Observed: -2.42 ft at 1:10PM Oct 12, 2021Observed: -2.47 ft at 1:50PM Oct 12, 2021Observed: -2.42 ft at 2:10PM Oct 12, 2021Observed: -2.39 ft at 2:50PM Oct 12, 2021Observed: -2.41 ft at 3:10PM Oct 12, 2021Observed: -2.34 ft at 3:50PM Oct 12, 2021Observed: -2.31 ft at 4:10PM Oct 12, 2021Observed: -2.22 ft at 4:50PM Oct 12, 2021Observed: -2.18 ft at 5:10PM Oct 12, 2021Observed: -2.19 ft at 5:50PM Oct 12, 2021Observed: -2.21 ft at 6:10PM Oct 12, 2021Observed: -2.19 ft at 6:50PM Oct 12, 2021Observed: -2.2 ft at 7:10PM Oct 12, 2021Observed: -2.14 ft at 7:50PM Oct 12, 2021Observed: -2.14 ft at 8:10PM Oct 12, 2021Observed: -2.1 ft at 8:50PM Oct 12, 2021Observed: -2.1 ft at 9:10PM Oct 12, 2021Observed: -2.06 ft at 9:50PM Oct 12, 2021Observed: -2.05 ft at 10:10PM Oct 12, 2021Observed: -1.99 ft at 10:50PM Oct 12, 2021Observed: -1.99 ft at 11:10PM Oct 12, 2021Observed: -2.02 ft at 11:50PM Oct 12, 2021Observed: -1.93 ft at 12:10AM Oct 13, 2021Observed: -1.96 ft at 12:50AM Oct 13, 2021Observed: -1.92 ft at 1:30AM Oct 13, 2021Observed: -1.87 ft at 2:10AM Oct 13, 2021Observed: -1.95 ft at 2:50AM Oct 13, 2021Observed: -1.91 ft at 3:10AM Oct 13, 2021Observed: -1.88 ft at 3:50AM Oct 13, 2021Observed: -1.85 ft at 4:10AM Oct 13, 2021Observed: -1.82 ft at 4:50AM Oct 13, 2021Observed: -1.8 ft at 5:10AM Oct 13, 2021Observed: -1.81 ft at 5:50AM Oct 13, 2021Observed: -1.8 ft at 6:10AM Oct 13, 2021Observed: -1.74 ft at 6:50AM Oct 13, 2021Observed: -1.75 ft at 7:10AM Oct 13, 2021Observed: -1.79 ft at 7:50AM Oct 13, 2021Observed: -1.84 ft at 8:10AM Oct 13, 2021Observed: -1.89 ft at 8:50AM Oct 13, 2021Observed: -1.89 ft at 9:10AM Oct 13, 2021Observed: -1.91 ft at 9:50AM Oct 13, 2021Observed: -1.95 ft at 10:10AM Oct 13, 2021Observed: -1.98 ft at 10:50AM Oct 13, 2021Observed: -1.99 ft at 11:10AM Oct 13, 2021Observed: -2.01 ft at 11:50AM Oct 13, 2021Observed: -1.99 ft at 12:10PM Oct 13, 2021Observed: -2.06 ft at 12:50PM Oct 13, 2021Observed: -2.07 ft at 1:10PM Oct 13, 2021Observed: -1.96 ft at 1:50PM Oct 13, 2021Observed: -1.91 ft at 2:10PM Oct 13, 2021Observed: -1.81 ft at 2:50PM Oct 13, 2021Observed: -1.87 ft at 3:10PM Oct 13, 2021Observed: -1.94 ft at 3:50PM Oct 13, 2021Observed: -1.97 ft at 4:10PM Oct 13, 2021Observed: -1.98 ft at 4:50PM Oct 13, 2021Observed: -1.99 ft at 5:10PM Oct 13, 2021Observed: -2.01 ft at 5:50PM Oct 13, 2021Observed: -1.93 ft at 6:10PM Oct 13, 2021Observed: -1.88 ft at 6:50PM Oct 13, 2021Observed: -1.82 ft at 7:10PM Oct 13, 2021Observed: -1.83 ft at 7:50PM Oct 13, 2021Observed: -1.86 ft at 8:10PM Oct 13, 2021Observed: -1.92 ft at 8:50PM Oct 13, 2021Observed: -1.95 ft at 9:10PM Oct 13, 2021Observed: -1.92 ft at 9:50PM Oct 13, 2021Observed: -1.94 ft at 10:10PM Oct 13, 2021Observed: -2 ft at 10:50PM Oct 13, 2021Observed: -2.08 ft at 11:10PM Oct 13, 2021Observed: -2.16 ft at 11:50PM Oct 13, 2021Observed: -2.14 ft at 12:10AM Oct 14, 2021Observed: -2.21 ft at 12:50AM Oct 14, 2021Observed: -2.26 ft at 1:30AM Oct 14, 2021Observed: -2.32 ft at 2:10AM Oct 14, 2021Observed: -2.38 ft at 2:50AM Oct 14, 2021Observed: -2.44 ft at 3:10AM Oct 14, 2021Observed: -2.49 ft at 3:50AM Oct 14, 2021Observed: -2.52 ft at 4:10AM Oct 14, 2021Observed: -2.58 ft at 4:50AM Oct 14, 2021Observed: -2.63 ft at 5:30AM Oct 14, 2021Observed: -2.69 ft at 6:10AM Oct 14, 2021Observed: -2.75 ft at 6:50AM Oct 14, 2021Observed: -2.77 ft at 7:10AM Oct 14, 2021Observed: -2.82 ft at 7:50AM Oct 14, 2021Observed: -2.89 ft at 8:10AM Oct 14, 2021Observed: -2.88 ft at 8:50AM Oct 14, 2021Observed: -2.83 ft at 9:10AM Oct 14, 2021Observed: -2.85 ft at 9:50AM Oct 14, 2021Observed: -2.86 ft at 10:30AM Oct 14, 2021Observed: -2.85 ft at 11:10AM Oct 14, 2021Observed: -2.81 ft at 11:50AM Oct 14, 2021Observed: -2.82 ft at 12:10PM Oct 14, 2021Observed: -2.78 ft at 12:50PM Oct 14, 2021Observed: -2.86 ft at 1:10PM Oct 14, 2021Observed: -2.8 ft at 1:50PM Oct 14, 2021Observed: -2.81 ft at 2:10PM Oct 14, 2021Observed: -2.83 ft at 2:50PM Oct 14, 2021Observed: -2.83 ft at 3:10PM Oct 14, 2021Observed: -2.75 ft at 3:50PM Oct 14, 2021Observed: -2.71 ft at 4:10PM Oct 14, 2021Observed: -2.59 ft at 4:50PM Oct 14, 2021Observed: -2.58 ft at 5:10PM Oct 14, 2021Observed: -2.59 ft at 5:50PM Oct 14, 2021Observed: -2.64 ft at 6:10PM Oct 14, 2021Observed: -2.74 ft at 6:50PM Oct 14, 2021Observed: -2.68 ft at 7:10PM Oct 14, 2021Observed: -2.74 ft at 7:50PM Oct 14, 2021Observed: -2.72 ft at 8:10PM Oct 14, 2021Observed: -2.68 ft at 8:50PM Oct 14, 2021Observed: -2.62 ft at 9:30PM Oct 14, 2021Observed: -2.59 ft at 10:10PM Oct 14, 2021Observed: -2.53 ft at 10:50PM Oct 14, 2021Observed: -2.56 ft at 11:10PM Oct 14, 2021Observed: -2.6 ft at 11:50PM Oct 14, 2021Observed: -2.57 ft at 12:30AM Oct 15, 2021Observed: -2.62 ft at 1:10AM Oct 15, 2021Observed: -2.56 ft at 1:50AM Oct 15, 2021Observed: -2.54 ft at 2:10AM Oct 15, 2021Observed: -2.5 ft at 2:50AM Oct 15, 2021Observed: -2.53 ft at 3:10AM Oct 15, 2021Observed: -2.51 ft at 3:50AM Oct 15, 2021Observed: -2.49 ft at 4:10AM Oct 15, 2021Observed: -2.56 ft at 4:50AM Oct 15, 2021Observed: -2.53 ft at 5:10AM Oct 15, 2021Observed: -2.48 ft at 5:50AM Oct 15, 2021Observed: -2.47 ft at 6:10AM Oct 15, 2021Observed: -2.44 ft at 6:50AM Oct 15, 2021Observed: -2.44 ft at 7:10AM Oct 15, 2021Observed: -2.42 ft at 7:50AM Oct 15, 2021Observed: -2.42 ft at 8:10AM Oct 15, 2021Observed: -2.42 ft at 8:50AM Oct 15, 2021Observed: -2.39 ft at 9:10AM Oct 15, 2021Observed: -2.37 ft at 9:50AM Oct 15, 2021Observed: -2.32 ft at 10:10AM Oct 15, 2021Observed: -2.43 ft at 10:50AM Oct 15, 2021Observed: -2.42 ft at 11:10AM Oct 15, 2021Observed: -2.43 ft at 11:50AM Oct 15, 2021Observed: -2.36 ft at 12:10PM Oct 15, 2021Observed: -2.36 ft at 12:50PM Oct 15, 2021Observed: -2.3 ft at 1:10PM Oct 15, 2021Observed: -2.29 ft at 1:40PM Oct 15, 2021Observed: -2.32 ft at 2:10PM Oct 15, 2021Observed: -2.34 ft at 2:50PM Oct 15, 2021Observed: -2.31 ft at 3:10PM Oct 15, 2021Observed: -2.26 ft at 3:50PM Oct 15, 2021Observed: -2.26 ft at 4:10PM Oct 15, 2021Observed: -2.36 ft at 4:50PM Oct 15, 2021Observed: -2.38 ft at 5:10PM Oct 15, 2021Observed: -2.36 ft at 5:50PM Oct 15, 2021Observed: -2.36 ft at 6:10PM Oct 15, 2021Observed: -2.37 ft at 6:50PM Oct 15, 2021Observed: -2.38 ft at 7:10PM Oct 15, 2021Observed: -2.29 ft at 7:50PM Oct 15, 2021Observed: -2.27 ft at 8:30PM Oct 15, 2021Observed: -2.24 ft at 9:10PM Oct 15, 2021Observed: -2.29 ft at 9:50PM Oct 15, 2021Observed: -2.3 ft at 10:10PM Oct 15, 2021Observed: -2.27 ft at 10:50PM Oct 15, 2021Observed: -2.22 ft at 11:10PM Oct 15, 2021Observed: -2.29 ft at 11:50PM Oct 15, 2021Observed: -2.25 ft at 12:10AM Oct 16, 2021Observed: -2.24 ft at 12:50AM Oct 16, 2021Observed: -2.2 ft at 1:30AM Oct 16, 2021Observed: -2.16 ft at 2:10AM Oct 16, 2021Observed: -2.17 ft at 2:50AM Oct 16, 2021Observed: -2.16 ft at 3:10AM Oct 16, 2021Observed: -2.24 ft at 3:50AM Oct 16, 2021Observed: -2.2 ft at 4:10AM Oct 16, 2021Observed: -2.26 ft at 4:50AM Oct 16, 2021Observed: -2.25 ft at 5:10AM Oct 16, 2021Observed: -2.18 ft at 5:50AM Oct 16, 2021Observed: -2.18 ft at 6:10AM Oct 16, 2021Observed: -2.19 ft at 6:50AM Oct 16, 2021Observed: -2.16 ft at 7:30AM Oct 16, 2021Observed: -2.12 ft at 8:10AM Oct 16, 2021Observed: -2.13 ft at 8:50AM Oct 16, 2021Observed: -2.12 ft at 9:10AM Oct 16, 2021Observed: -2.09 ft at 9:50AM Oct 16, 2021Observed: -2.11 ft at 10:10AM Oct 16, 2021Observed: -2.07 ft at 10:50AM Oct 16, 2021Observed: -2.06 ft at 11:10AM Oct 16, 2021Observed: -2.14 ft at 11:50AM Oct 16, 2021Observed: -2.07 ft at 12:10PM Oct 16, 2021Observed: -2.1 ft at 12:50PM Oct 16, 2021Observed: -2.07 ft at 1:10PM Oct 16, 2021Observed: -2.09 ft at 1:50PM Oct 16, 2021Observed: -2.1 ft at 2:10PM Oct 16, 2021Observed: -2.08 ft at 2:40PM Oct 16, 2021Observed: -2.16 ft at 3:10PM Oct 16, 2021Observed: -2.07 ft at 3:50PM Oct 16, 2021Observed: -2.12 ft at 4:10PM Oct 16, 2021Observed: -2.07 ft at 4:40PM Oct 16, 2021Observed: -2.03 ft at 5:10PM Oct 16, 2021Observed: -1.94 ft at 5:50PM Oct 16, 2021Observed: -2.01 ft at 6:10PM Oct 16, 2021Observed: -1.97 ft at 6:50PM Oct 16, 2021Observed: -1.97 ft at 7:10PM Oct 16, 2021Observed: -1.97 ft at 7:50PM Oct 16, 2021Observed: -1.98 ft at 8:10PM Oct 16, 2021Observed: -2 ft at 8:50PM Oct 16, 2021Observed: -1.98 ft at 9:10PM Oct 16, 2021Observed: -1.86 ft at 9:50PM Oct 16, 2021USGS--Water Resources of the United StatesNBGI2(plotting HGIRP) Graph Created (10:55PM Oct 16, 2021)ObservedLatest observed value: -1.86 ft at 9:50 PM CDT 16-Oct-2021. Flood Stage is 3 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: Forecasts for the North Branch Chicago River at Chicago (Grand Ave) are issued as needed during times of high water, but are not routinely available.
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Upstream Gauge - at Chicago (Pulaski Rd) Upstream Gauge Downstream Gauge Downstream Gauge - at Chicago (Columbus Dr)
Flood Categories (in feet)
Major Flood Stage: 5
Moderate Flood Stage: 4
Flood Stage: 3
Action Stage: 1
Low Stage (in feet): -4

Historic Crests
(1) 5.70 ft on 10/10/1954
(2) 5.32 ft on 05/17/2020
(3) 5.00 ft on 07/24/2010
(4) 4.28 ft on 07/23/2011
(5) 4.20 ft on 08/16/1997 (P)
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 5.32 ft on 05/17/2020
(2) 3.72 ft on 10/14/2017
(3) 3.37 ft on 06/15/2015
(4) 2.86 ft on 06/30/2014
(5) 3.67 ft on 04/18/2013
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) -4.50 ft on 06/28/2011
(2) -4.20 ft on 03/14/2011
(3) -4.10 ft on 03/07/2009
(4) -4.10 ft on 09/20/2013
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
6 Numerous structures flooded near the river in the River West, River North, and West Loop neighborhoods.
5.5 Railroad tracks near Lake and Canal Streets are threatened.
5 Lower level of residences threatened along Wells Street near Polk Street. A few residences threatened along the river near Grand Avenue. Railroad tracks near Union Station are threatened. Lower level of office towers may be threatened near the river. Low-lying parking lots are threatened between Grand Avenue and Chicago Avenue.
4 Lower Wacker Drive is threatened.
3.5 Commercial areas of the Chicago Riverwalk are threatened.
3 Numerous stretches of the Chicago Riverwalk are inundated. USACE and MWRD consider opening of Chicago Lock to reduce flood impacts, depending on the water level of Lake Michigan.
2 Low-lying sections of the Chicago Riverwalk are threatened.
1 City of Chicago considers closure of the Chicago Riverwalk.
Photos
(1) 05/17/2020, 5.0ft. Chicago Riverwalk near Clark Street. Credit: City of Chicago
(2) 05/17/2020, 5.0ft. Chicago Riverwalk near Wells Street. Credit: City of Chicago
Low Water Impacts Collapse
If you notice any errors in the below information, please contact our Webmaster
-4 Low water levels begin to impact shipping interests along the river.
About This Location Collapse

Latitude: 41.891667° N, Longitude: 87.641667° W, Horizontal Datum: NAD27

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 3 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 579.20 582.20 Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 579.48 582.48 Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other 0.0 3.0 Chicago City Datum

Current/Historical Observations:

Additional Information Collapse
How much forecast precipitation was used for the current river forecast?

This gage is on the "Chicago City Datum" (CCD). This causes stages at this gauge to often be reported as negative. Stages are not the same as river depth.
Resources Collapse
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
Chicago Weather Forecast Office
333 W. University Dr.
Romeoville, IL 60446
(815) 834-1435
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Page last modified: 2-Nov-2020 7:29 PM
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