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Hydrograph River at a Glance Download
Illinois River near La Salle Stage (ft)Flow (kcfs)Highest Observation: 15.58 ft at 11:30PM Oct 19, 2014Highest Observation: 15.58 ft at 11:45PM Oct 19, 2014Observed: 15.57 ft at 12:00AM Oct 20, 2014Observed: 15.56 ft at 12:15AM Oct 20, 2014Observed: 15.48 ft at 12:30AM Oct 20, 2014Observed: 15.41 ft at 12:45AM Oct 20, 2014Observed: 15.4 ft at 1:00AM Oct 20, 2014Observed: 15.39 ft at 1:15AM Oct 20, 2014Observed: 15.37 ft at 1:30AM Oct 20, 2014Observed: 15.35 ft at 1:45AM Oct 20, 2014Observed: 15.35 ft at 2:00AM Oct 20, 2014Observed: 15.36 ft at 2:15AM Oct 20, 2014Observed: 15.35 ft at 2:30AM Oct 20, 2014Observed: 15.35 ft at 2:45AM Oct 20, 2014Observed: 15.34 ft at 3:00AM Oct 20, 2014Observed: 15.33 ft at 3:15AM Oct 20, 2014Observed: 15.33 ft at 3:30AM Oct 20, 2014Observed: 15.32 ft at 3:45AM Oct 20, 2014Observed: 15.32 ft at 4:00AM Oct 20, 2014Observed: 15.31 ft at 4:15AM Oct 20, 2014Observed: 15.3 ft at 4:30AM Oct 20, 2014Observed: 15.31 ft at 4:45AM Oct 20, 2014Observed: 15.38 ft at 5:00AM Oct 20, 2014Observed: 15.39 ft at 5:15AM Oct 20, 2014Observed: 15.4 ft at 5:30AM Oct 20, 2014Observed: 15.41 ft at 5:45AM Oct 20, 2014Observed: 15.43 ft at 6:00AM Oct 20, 2014Observed: 15.44 ft at 6:15AM Oct 20, 2014Observed: 15.46 ft at 6:30AM Oct 20, 2014Observed: 15.46 ft at 6:45AM Oct 20, 2014Observed: 15.45 ft at 7:00AM Oct 20, 2014Observed: 15.47 ft at 7:15AM Oct 20, 2014Observed: 15.49 ft at 7:30AM Oct 20, 2014Observed: 15.49 ft at 7:45AM Oct 20, 2014Observed: 15.48 ft at 8:00AM Oct 20, 2014Observed: 15.48 ft at 8:15AM Oct 20, 2014Observed: 15.49 ft at 8:30AM Oct 20, 2014Observed: 15.49 ft at 8:45AM Oct 20, 2014Observed: 15.48 ft at 9:00AM Oct 20, 2014Observed: 15.49 ft at 9:15AM Oct 20, 2014Observed: 15.51 ft at 9:30AM Oct 20, 2014Observed: 15.5 ft at 9:45AM Oct 20, 2014Observed: 15.49 ft at 10:00AM Oct 20, 2014Observed: 15.48 ft at 10:15AM Oct 20, 2014Observed: 15.5 ft at 10:30AM Oct 20, 2014Observed: 15.5 ft at 10:45AM Oct 20, 2014Observed: 15.5 ft at 11:00AM Oct 20, 2014Observed: 15.51 ft at 11:15AM Oct 20, 2014Observed: 15.51 ft at 11:30AM Oct 20, 2014Observed: 15.5 ft at 11:45AM Oct 20, 2014Observed: 15.5 ft at 12:00PM Oct 20, 2014Observed: 15.51 ft at 12:15PM Oct 20, 2014Observed: 15.52 ft at 12:30PM Oct 20, 2014Observed: 15.51 ft at 12:45PM Oct 20, 2014Observed: 15.49 ft at 1:00PM Oct 20, 2014Observed: 15.48 ft at 1:15PM Oct 20, 2014Observed: 15.5 ft at 1:30PM Oct 20, 2014Observed: 15.5 ft at 1:45PM Oct 20, 2014Observed: 15.49 ft at 2:00PM Oct 20, 2014Observed: 15.51 ft at 2:15PM Oct 20, 2014Observed: 15.49 ft at 2:30PM Oct 20, 2014Observed: 15.48 ft at 2:45PM Oct 20, 2014Observed: 15.42 ft at 3:00PM Oct 20, 2014Observed: 15.4 ft at 3:15PM Oct 20, 2014Observed: 15.17 ft at 3:30PM Oct 20, 2014Observed: 15.09 ft at 3:45PM Oct 20, 2014Observed: 15.06 ft at 4:00PM Oct 20, 2014Observed: 14.98 ft at 4:15PM Oct 20, 2014Observed: 14.98 ft at 4:30PM Oct 20, 2014Observed: 14.95 ft at 4:45PM Oct 20, 2014Observed: 14.85 ft at 5:00PM Oct 20, 2014Observed: 14.83 ft at 5:15PM Oct 20, 2014Observed: 14.82 ft at 5:30PM Oct 20, 2014Observed: 14.79 ft at 5:45PM Oct 20, 2014Observed: 14.75 ft at 6:00PM Oct 20, 2014Observed: 14.72 ft at 6:15PM Oct 20, 2014Observed: 14.72 ft at 6:30PM Oct 20, 2014Observed: 14.73 ft at 6:45PM Oct 20, 2014Observed: 14.74 ft at 7:00PM Oct 20, 2014Observed: 14.75 ft at 7:15PM Oct 20, 2014Observed: 14.74 ft at 7:30PM Oct 20, 2014Observed: 14.75 ft at 7:45PM Oct 20, 2014Observed: 14.76 ft at 8:00PM Oct 20, 2014Observed: 14.83 ft at 8:15PM Oct 20, 2014Observed: 14.84 ft at 8:30PM Oct 20, 2014Observed: 14.87 ft at 8:45PM Oct 20, 2014Observed: 14.88 ft at 9:00PM Oct 20, 2014Observed: 14.9 ft at 9:15PM Oct 20, 2014Observed: 14.92 ft at 9:30PM Oct 20, 2014Observed: 14.94 ft at 9:45PM Oct 20, 2014Observed: 14.94 ft at 10:00PM Oct 20, 2014Observed: 14.94 ft at 10:15PM Oct 20, 2014Observed: 15.04 ft at 10:30PM Oct 20, 2014Observed: 15.01 ft at 10:45PM Oct 20, 2014Observed: 14.99 ft at 11:00PM Oct 20, 2014Observed: 14.99 ft at 11:15PM Oct 20, 2014Observed: 14.99 ft at 11:30PM Oct 20, 2014Observed: 14.99 ft at 11:45PM Oct 20, 2014Observed: 15 ft at 12:00AM Oct 21, 2014Observed: 14.91 ft at 12:15AM Oct 21, 2014Observed: 14.81 ft at 12:30AM Oct 21, 2014Observed: 14.8 ft at 12:45AM Oct 21, 2014Observed: 14.78 ft at 1:00AM Oct 21, 2014Observed: 14.68 ft at 1:15AM Oct 21, 2014Observed: 14.66 ft at 1:30AM Oct 21, 2014Observed: 14.63 ft at 1:45AM Oct 21, 2014Observed: 14.6 ft at 2:00AM Oct 21, 2014Observed: 14.56 ft at 2:15AM Oct 21, 2014Observed: 14.53 ft at 2:30AM Oct 21, 2014Observed: 14.51 ft at 2:45AM Oct 21, 2014Observed: 14.48 ft at 3:00AM Oct 21, 2014Observed: 14.46 ft at 3:15AM Oct 21, 2014Observed: 14.45 ft at 3:30AM Oct 21, 2014Observed: 14.42 ft at 3:45AM Oct 21, 2014Observed: 14.39 ft at 4:00AM Oct 21, 2014Observed: 14.37 ft at 4:15AM Oct 21, 2014Observed: 14.35 ft at 4:30AM Oct 21, 2014Observed: 14.33 ft at 4:45AM Oct 21, 2014Observed: 14.41 ft at 5:00AM Oct 21, 2014Observed: 14.42 ft at 5:15AM Oct 21, 2014Observed: 14.42 ft at 5:30AM Oct 21, 2014Observed: 14.5 ft at 5:45AM Oct 21, 2014Observed: 14.48 ft at 6:00AM Oct 21, 2014Observed: 14.47 ft at 6:15AM Oct 21, 2014Observed: 14.55 ft at 6:30AM Oct 21, 2014Observed: 14.53 ft at 6:45AM Oct 21, 2014Observed: 14.63 ft at 7:00AM Oct 21, 2014Observed: 14.69 ft at 7:15AM Oct 21, 2014Observed: 14.71 ft at 7:30AM Oct 21, 2014Observed: 14.73 ft at 7:45AM Oct 21, 2014Observed: 14.76 ft at 8:00AM Oct 21, 2014Observed: 14.91 ft at 8:15AM Oct 21, 2014Observed: 14.91 ft at 8:30AM Oct 21, 2014Observed: 14.87 ft at 8:45AM Oct 21, 2014Observed: 14.87 ft at 9:00AM Oct 21, 2014Observed: 14.9 ft at 9:15AM Oct 21, 2014Observed: 14.92 ft at 9:30AM Oct 21, 2014Observed: 14.9 ft at 9:45AM Oct 21, 2014Observed: 14.9 ft at 10:00AM Oct 21, 2014Observed: 14.91 ft at 10:15AM Oct 21, 2014Observed: 14.98 ft at 10:30AM Oct 21, 2014Observed: 14.97 ft at 10:45AM Oct 21, 2014Observed: 14.97 ft at 11:00AM Oct 21, 2014Observed: 14.96 ft at 11:15AM Oct 21, 2014Observed: 14.74 ft at 11:30AM Oct 21, 2014Observed: 14.71 ft at 11:45AM Oct 21, 2014Observed: 14.64 ft at 12:00PM Oct 21, 2014Observed: 14.64 ft at 12:15PM Oct 21, 2014Observed: 14.64 ft at 12:30PM Oct 21, 2014Observed: 14.58 ft at 12:45PM Oct 21, 2014Observed: 14.5 ft at 1:00PM Oct 21, 2014Observed: 14.49 ft at 1:15PM Oct 21, 2014Observed: 14.47 ft at 1:30PM Oct 21, 2014Observed: 14.45 ft at 1:45PM Oct 21, 2014Observed: 14.42 ft at 2:00PM Oct 21, 2014Observed: 14.41 ft at 2:15PM Oct 21, 2014Observed: 14.4 ft at 2:30PM Oct 21, 2014Observed: 14.39 ft at 2:45PM Oct 21, 2014Observed: 14.39 ft at 3:00PM Oct 21, 2014Observed: 14.39 ft at 3:15PM Oct 21, 2014Observed: 14.36 ft at 3:30PM Oct 21, 2014Observed: 14.3 ft at 3:45PM Oct 21, 2014Observed: 14.3 ft at 4:00PM Oct 21, 2014Observed: 14.31 ft at 4:15PM Oct 21, 2014Observed: 14.3 ft at 4:30PM Oct 21, 2014Observed: 14.28 ft at 4:45PM Oct 21, 2014Observed: 14.26 ft at 5:00PM Oct 21, 2014Observed: 14.26 ft at 5:15PM Oct 21, 2014Observed: 14.26 ft at 5:30PM Oct 21, 2014Observed: 14.24 ft at 5:45PM Oct 21, 2014Observed: 14.24 ft at 6:00PM Oct 21, 2014Observed: 14.23 ft at 6:15PM Oct 21, 2014Observed: 14.22 ft at 6:30PM Oct 21, 2014Observed: 14.23 ft at 6:45PM Oct 21, 2014Observed: 14.25 ft at 7:00PM Oct 21, 2014Observed: 14.23 ft at 7:15PM Oct 21, 2014Observed: 14.2 ft at 7:30PM Oct 21, 2014Observed: 14.4 ft at 7:45PM Oct 21, 2014Observed: 14.5 ft at 8:00PM Oct 21, 2014Observed: 14.51 ft at 8:15PM Oct 21, 2014Observed: 14.53 ft at 8:30PM Oct 21, 2014Observed: 14.55 ft at 8:45PM Oct 21, 2014Observed: 14.58 ft at 9:00PM Oct 21, 2014Observed: 14.62 ft at 9:15PM Oct 21, 2014Observed: 14.65 ft at 9:30PM Oct 21, 2014Observed: 14.67 ft at 9:45PM Oct 21, 2014Observed: 14.76 ft at 10:00PM Oct 21, 2014Observed: 14.75 ft at 10:15PM Oct 21, 2014Observed: 14.75 ft at 10:30PM Oct 21, 2014Observed: 14.76 ft at 10:45PM Oct 21, 2014Observed: 14.65 ft at 11:00PM Oct 21, 2014Observed: 14.57 ft at 11:15PM Oct 21, 2014Observed: 14.5 ft at 11:30PM Oct 21, 2014Observed: 14.5 ft at 11:45PM Oct 21, 2014Observed: 14.47 ft at 12:00AM Oct 22, 2014Observed: 14.46 ft at 12:15AM Oct 22, 2014Observed: 14.44 ft at 12:30AM Oct 22, 2014Observed: 14.42 ft at 12:45AM Oct 22, 2014Observed: 14.39 ft at 1:00AM Oct 22, 2014Observed: 14.36 ft at 1:15AM Oct 22, 2014Observed: 14.35 ft at 1:30AM Oct 22, 2014Observed: 14.35 ft at 1:45AM Oct 22, 2014Observed: 14.35 ft at 2:00AM Oct 22, 2014Observed: 14.32 ft at 2:15AM Oct 22, 2014Observed: 14.24 ft at 2:30AM Oct 22, 2014Observed: 14.24 ft at 2:45AM Oct 22, 2014Observed: 14.22 ft at 3:00AM Oct 22, 2014Observed: 14.21 ft at 3:15AM Oct 22, 2014Observed: 14.2 ft at 3:30AM Oct 22, 2014Observed: 14.19 ft at 3:45AM Oct 22, 2014Observed: 14.18 ft at 4:00AM Oct 22, 2014Observed: 14.16 ft at 4:15AM Oct 22, 2014Observed: 14.15 ft at 4:30AM Oct 22, 2014Observed: 14.17 ft at 4:45AM Oct 22, 2014Observed: 14.15 ft at 5:00AM Oct 22, 2014Observed: 14.13 ft at 5:15AM Oct 22, 2014Observed: 14.11 ft at 5:30AM Oct 22, 2014Observed: 14.1 ft at 5:45AM Oct 22, 2014Observed: 14.1 ft at 6:00AM Oct 22, 2014Observed: 14.1 ft at 6:15AM Oct 22, 2014Observed: 14.09 ft at 6:30AM Oct 22, 2014Observed: 14.08 ft at 6:45AM Oct 22, 2014Observed: 14.08 ft at 7:00AM Oct 22, 2014Observed: 14.07 ft at 7:15AM Oct 22, 2014Observed: 14.06 ft at 7:30AM Oct 22, 2014Observed: 14.05 ft at 7:45AM Oct 22, 2014Observed: 14.05 ft at 8:00AM Oct 22, 2014Observed: 14.04 ft at 8:15AM Oct 22, 2014Observed: 14.05 ft at 8:30AM Oct 22, 2014Observed: 14.06 ft at 8:45AM Oct 22, 2014Observed: 14.06 ft at 9:00AM Oct 22, 2014Observed: 14.02 ft at 9:15AM Oct 22, 2014Observed: 14.02 ft at 9:30AM Oct 22, 2014Observed: 14.03 ft at 9:45AM Oct 22, 2014Observed: 14.03 ft at 10:00AM Oct 22, 2014Observed: 14 ft at 10:15AM Oct 22, 2014Observed: 14.01 ft at 10:30AM Oct 22, 2014Observed: 14.01 ft at 10:45AM Oct 22, 2014Observed: 14.01 ft at 11:00AM Oct 22, 2014Observed: 14.12 ft at 11:15AM Oct 22, 2014Observed: 14.13 ft at 11:30AM Oct 22, 2014Observed: 14.15 ft at 11:45AM Oct 22, 2014Observed: 14.18 ft at 12:00PM Oct 22, 2014Observed: 14.21 ft at 12:15PM Oct 22, 2014Observed: 14.23 ft at 12:30PM Oct 22, 2014Observed: 14.3 ft at 12:45PM Oct 22, 2014Observed: 14.29 ft at 1:00PM Oct 22, 2014Observed: 14.29 ft at 1:15PM Oct 22, 2014Observed: 14.31 ft at 1:30PM Oct 22, 2014Observed: 14.33 ft at 1:45PM Oct 22, 2014Observed: 14.36 ft at 2:00PM Oct 22, 2014Observed: 14.43 ft at 2:15PM Oct 22, 2014Observed: 14.35 ft at 2:30PM Oct 22, 2014Observed: 14.35 ft at 2:45PM Oct 22, 2014Observed: 14.35 ft at 3:00PM Oct 22, 2014Observed: 14.34 ft at 3:15PM Oct 22, 2014Observed: 14.36 ft at 3:30PM Oct 22, 2014Observed: 14.37 ft at 3:45PM Oct 22, 2014Observed: 14.37 ft at 4:00PM Oct 22, 2014Observed: 14.36 ft at 4:15PM Oct 22, 2014Observed: 14.24 ft at 4:30PM Oct 22, 2014Observed: 14.22 ft at 4:45PM Oct 22, 2014Observed: 14.2 ft at 5:00PM Oct 22, 2014Observed: 14.18 ft at 5:15PM Oct 22, 2014Observed: 14.15 ft at 5:30PM Oct 22, 2014Observed: 14.13 ft at 5:45PM Oct 22, 2014Observed: 14.12 ft at 6:00PM Oct 22, 2014Observed: 14.13 ft at 6:15PM Oct 22, 2014Observed: 14.11 ft at 6:30PM Oct 22, 2014Observed: 14.08 ft at 6:45PM Oct 22, 2014Observed: 14.06 ft at 7:00PM Oct 22, 2014Observed: 14.03 ft at 7:15PM Oct 22, 2014Observed: 14.03 ft at 7:30PM Oct 22, 2014Observed: 14.02 ft at 7:45PM Oct 22, 2014Observed: 14 ft at 8:00PM Oct 22, 2014Observed: 13.99 ft at 8:15PM Oct 22, 2014Observed: 13.99 ft at 8:30PM Oct 22, 2014Observed: 13.98 ft at 8:45PM Oct 22, 2014Observed: 13.88 ft at 9:00PM Oct 22, 2014Observed: 13.82 ft at 9:15PM Oct 22, 2014Observed: 13.79 ft at 9:30PM Oct 22, 2014Observed: 13.76 ft at 9:45PM Oct 22, 2014Observed: 13.58 ft at 10:00PM Oct 22, 2014Observed: 13.52 ft at 10:15PM Oct 22, 2014Observed: 13.54 ft at 10:30PM Oct 22, 2014Observed: 13.46 ft at 10:45PM Oct 22, 2014Highest Forecast: 13.8 ft 1:00AM Oct 23, 2014Forecast: 13.7 ft 7:00AM Oct 23, 2014Forecast: 13.5 ft 1:00PM Oct 23, 2014Forecast: 13.5 ft 7:00PM Oct 23, 2014Forecast: 13.4 ft 1:00AM Oct 24, 2014Forecast: 13.3 ft 7:00AM Oct 24, 2014Forecast: 13.2 ft 1:00PM Oct 24, 2014Forecast: 13.1 ft 7:00PM Oct 24, 2014Forecast: 13 ft 1:00AM Oct 25, 2014Forecast: 13 ft 7:00AM Oct 25, 2014Forecast: 12.9 ft 1:00PM Oct 25, 2014Forecast: 12.9 ft 7:00PM Oct 25, 2014Forecast: 12.8 ft 1:00AM Oct 26, 2014Forecast: 12.7 ft 7:00AM Oct 26, 2014Forecast: 12.7 ft 1:00PM Oct 26, 2014Forecast: 12.6 ft 7:00PM Oct 26, 2014Forecast: 12.5 ft 1:00AM Oct 27, 2014Forecast: 12.5 ft 7:00AM Oct 27, 2014Forecast: 12.4 ft 1:00PM Oct 27, 2014Forecast: 12.3 ft 7:00PM Oct 27, 2014Forecast: 12.3 ft 1:00AM Oct 28, 2014Forecast: 12.2 ft 7:00AM Oct 28, 2014Forecast: 12.1 ft 1:00PM Oct 28, 2014Forecast: 12.1 ft 7:00PM Oct 28, 2014Forecast: 12 ft 1:00AM Oct 29, 2014Forecast: 12 ft 7:00AM Oct 29, 2014Forecast: 11.9 ft 1:00PM Oct 29, 2014Forecast: 11.9 ft 7:00PM Oct 29, 2014LSLI2(plotting HGIRG) Graph Created (11:20PM Oct 22, 2014)ObservedForecast (issued 7:29PM Oct 22)Latest observed value: 13.46 ft at 10:45 PM CDT 22-Oct-2014. Flood Stage is 20 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.

NOTE: Forecasts for the Illinois River near La Salle are issued routinely year-round.

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Upstream Gauge - at Starved Rock lock/dam Upstream Gauge Downstream Gauge Downstream Gauge - at Henry
Flood Categories (in feet)
Major Flood Stage:31
Moderate Flood Stage:27
Flood Stage:20
Action Stage:19

Historical Crests
(1) 34.44 ft on 04/20/2013
(2) 33.79 ft on 09/16/2008
(3) 32.05 ft on 12/05/1982
(4) 32.02 ft on 03/12/2009
(5) 31.75 ft on 03/21/1979
Show More Historical 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:15
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
33 The business district in La Salle floods.
31 Some flood damage begins in Ottawa.
30 Water reaches the top of the La Salle water pumping station pit.
29 Flooding begins in sections of Peru.
27.5 Hennepin Levee is overtopped at road crossing.
27 Some flooding begins to low lying residences in Ottawa.
22 Riverside parking lot at Starved Rock State park floods.
21 Low lying agricultural areas from 6 miles upstream to 12 miles downstream are flooded.
20 Agricultural areas in La Salle, Spring Valley, and Peru lowlands are flooded.
17.5 Some flooding of agricultural land begins.
About This Location Collapse

Latitude: 41.323611° N, Longitude: 89.110833° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 20 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 29 430 ft 450 ft 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
How much forecast precipitation was used for the current river forecast?
How low could the river get?
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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: 5-Aug-2014 6:38 PM
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