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Hydrograph River at a Glance Download
Illinois River near La Salle Stage (ft)Flow (kcfs)Observed: 12.44 ft at 1:30PM Jul 25, 2014Observed: 12.48 ft at 1:45PM Jul 25, 2014Observed: 12.49 ft at 2:00PM Jul 25, 2014Observed: 12.5 ft at 2:15PM Jul 25, 2014Observed: 12.49 ft at 2:30PM Jul 25, 2014Observed: 12.48 ft at 2:45PM Jul 25, 2014Observed: 12.36 ft at 3:00PM Jul 25, 2014Observed: 12.43 ft at 3:15PM Jul 25, 2014Observed: 12.46 ft at 3:30PM Jul 25, 2014Observed: 12.35 ft at 3:45PM Jul 25, 2014Observed: 12.45 ft at 4:00PM Jul 25, 2014Observed: 12.44 ft at 4:15PM Jul 25, 2014Observed: 12.43 ft at 4:30PM Jul 25, 2014Observed: 12.42 ft at 4:45PM Jul 25, 2014Observed: 12.41 ft at 5:00PM Jul 25, 2014Observed: 12.41 ft at 5:15PM Jul 25, 2014Observed: 12.42 ft at 5:30PM Jul 25, 2014Observed: 12.42 ft at 5:45PM Jul 25, 2014Observed: 12.44 ft at 6:00PM Jul 25, 2014Observed: 12.46 ft at 6:15PM Jul 25, 2014Observed: 12.47 ft at 6:30PM Jul 25, 2014Observed: 12.46 ft at 6:45PM Jul 25, 2014Observed: 12.47 ft at 7:00PM Jul 25, 2014Observed: 12.49 ft at 7:15PM Jul 25, 2014Observed: 12.51 ft at 7:30PM Jul 25, 2014Observed: 12.52 ft at 7:45PM Jul 25, 2014Observed: 12.53 ft at 8:00PM Jul 25, 2014Observed: 12.53 ft at 8:15PM Jul 25, 2014Observed: 12.52 ft at 8:30PM Jul 25, 2014Observed: 12.53 ft at 8:45PM Jul 25, 2014Observed: 12.54 ft at 9:00PM Jul 25, 2014Observed: 12.55 ft at 9:15PM Jul 25, 2014Observed: 12.58 ft at 9:30PM Jul 25, 2014Observed: 12.58 ft at 9:45PM Jul 25, 2014Observed: 12.57 ft at 10:00PM Jul 25, 2014Observed: 12.6 ft at 10:15PM Jul 25, 2014Highest Observation: 12.61 ft at 10:30PM Jul 25, 2014Observed: 12.6 ft at 10:45PM Jul 25, 2014Observed: 12.59 ft at 11:00PM Jul 25, 2014Observed: 12.59 ft at 11:15PM Jul 25, 2014Observed: 12.59 ft at 11:30PM Jul 25, 2014Observed: 12.59 ft at 11:45PM Jul 25, 2014Observed: 12.59 ft at 12:00AM Jul 26, 2014Observed: 12.59 ft at 12:15AM Jul 26, 2014Highest Observation: 12.61 ft at 12:30AM Jul 26, 2014Highest Observation: 12.61 ft at 12:45AM Jul 26, 2014Observed: 12.59 ft at 1:00AM Jul 26, 2014Observed: 12.58 ft at 1:15AM Jul 26, 2014Observed: 12.58 ft at 1:30AM Jul 26, 2014Observed: 12.57 ft at 1:45AM Jul 26, 2014Observed: 12.54 ft at 2:00AM Jul 26, 2014Observed: 12.51 ft at 2:15AM Jul 26, 2014Observed: 12.49 ft at 2:30AM Jul 26, 2014Observed: 12.48 ft at 2:45AM Jul 26, 2014Observed: 12.47 ft at 3:00AM Jul 26, 2014Observed: 12.46 ft at 3:15AM Jul 26, 2014Observed: 12.39 ft at 3:30AM Jul 26, 2014Observed: 12.4 ft at 3:45AM Jul 26, 2014Observed: 12.41 ft at 4:00AM Jul 26, 2014Observed: 12.4 ft at 4:15AM Jul 26, 2014Observed: 12.39 ft at 4:30AM Jul 26, 2014Observed: 12.38 ft at 4:45AM Jul 26, 2014Observed: 12.44 ft at 5:00AM Jul 26, 2014Observed: 12.36 ft at 5:15AM Jul 26, 2014Observed: 12.34 ft at 5:30AM Jul 26, 2014Observed: 12.31 ft at 5:45AM Jul 26, 2014Observed: 12.38 ft at 6:00AM Jul 26, 2014Observed: 12.37 ft at 6:15AM Jul 26, 2014Observed: 12.37 ft at 6:30AM Jul 26, 2014Observed: 12.35 ft at 6:45AM Jul 26, 2014Observed: 12.32 ft at 7:00AM Jul 26, 2014Observed: 12.31 ft at 7:15AM Jul 26, 2014Observed: 12.31 ft at 7:30AM Jul 26, 2014Observed: 12.29 ft at 7:45AM Jul 26, 2014Observed: 12.28 ft at 8:00AM Jul 26, 2014Observed: 12.28 ft at 8:15AM Jul 26, 2014Observed: 12.26 ft at 8:30AM Jul 26, 2014Observed: 12.38 ft at 8:45AM Jul 26, 2014Observed: 12.27 ft at 9:00AM Jul 26, 2014Observed: 12.27 ft at 9:15AM Jul 26, 2014Observed: 12.27 ft at 9:30AM Jul 26, 2014Observed: 12.28 ft at 9:45AM Jul 26, 2014Observed: 12.22 ft at 10:00AM Jul 26, 2014Observed: 12.24 ft at 10:15AM Jul 26, 2014Observed: 12.26 ft at 10:30AM Jul 26, 2014Observed: 12.25 ft at 10:45AM Jul 26, 2014Observed: 12.25 ft at 11:00AM Jul 26, 2014Observed: 12.25 ft at 11:15AM Jul 26, 2014Observed: 12.24 ft at 11:30AM Jul 26, 2014Observed: 12.23 ft at 11:45AM Jul 26, 2014Observed: 12.24 ft at 12:00PM Jul 26, 2014Observed: 12.22 ft at 12:15PM Jul 26, 2014Observed: 12.14 ft at 12:30PM Jul 26, 2014Observed: 12.15 ft at 12:45PM Jul 26, 2014Observed: 12.16 ft at 1:00PM Jul 26, 2014Observed: 12.16 ft at 1:15PM Jul 26, 2014Observed: 12.17 ft at 1:30PM Jul 26, 2014Observed: 12.2 ft at 1:45PM Jul 26, 2014Observed: 12.19 ft at 2:00PM Jul 26, 2014Observed: 12.16 ft at 2:15PM Jul 26, 2014Observed: 12.14 ft at 2:30PM Jul 26, 2014Observed: 12.15 ft at 2:45PM Jul 26, 2014Observed: 12.15 ft at 3:00PM Jul 26, 2014Observed: 12.14 ft at 3:15PM Jul 26, 2014Observed: 12.1 ft at 3:30PM Jul 26, 2014Observed: 12.09 ft at 3:45PM Jul 26, 2014Observed: 12.08 ft at 4:00PM Jul 26, 2014Observed: 12 ft at 4:15PM Jul 26, 2014Observed: 12.02 ft at 4:30PM Jul 26, 2014Observed: 11.97 ft at 4:45PM Jul 26, 2014Observed: 11.99 ft at 5:00PM Jul 26, 2014Observed: 12.02 ft at 5:15PM Jul 26, 2014Observed: 11.93 ft at 5:30PM Jul 26, 2014Observed: 11.99 ft at 5:45PM Jul 26, 2014Observed: 11.98 ft at 6:00PM Jul 26, 2014Observed: 11.98 ft at 6:15PM Jul 26, 2014Observed: 11.98 ft at 6:30PM Jul 26, 2014Observed: 11.95 ft at 6:45PM Jul 26, 2014Observed: 11.93 ft at 7:00PM Jul 26, 2014Observed: 11.94 ft at 7:15PM Jul 26, 2014Observed: 11.94 ft at 7:30PM Jul 26, 2014Observed: 11.94 ft at 7:45PM Jul 26, 2014Observed: 11.92 ft at 8:00PM Jul 26, 2014Observed: 11.9 ft at 8:15PM Jul 26, 2014Observed: 11.89 ft at 8:30PM Jul 26, 2014Observed: 11.88 ft at 8:45PM Jul 26, 2014Observed: 11.86 ft at 9:00PM Jul 26, 2014Observed: 11.85 ft at 9:15PM Jul 26, 2014Observed: 11.86 ft at 9:30PM Jul 26, 2014Observed: 11.84 ft at 9:45PM Jul 26, 2014Observed: 11.82 ft at 10:00PM Jul 26, 2014Observed: 11.82 ft at 10:15PM Jul 26, 2014Observed: 11.76 ft at 10:30PM Jul 26, 2014Observed: 11.77 ft at 10:45PM Jul 26, 2014Observed: 11.77 ft at 11:00PM Jul 26, 2014Observed: 11.85 ft at 11:15PM Jul 26, 2014Observed: 11.83 ft at 11:30PM Jul 26, 2014Observed: 11.73 ft at 11:45PM Jul 26, 2014Observed: 11.75 ft at 12:00AM Jul 27, 2014Observed: 11.76 ft at 12:15AM Jul 27, 2014Observed: 11.78 ft at 12:30AM Jul 27, 2014Observed: 11.77 ft at 12:45AM Jul 27, 2014Observed: 11.74 ft at 1:00AM Jul 27, 2014Observed: 11.72 ft at 1:15AM Jul 27, 2014Observed: 11.71 ft at 1:30AM Jul 27, 2014Observed: 11.7 ft at 1:45AM Jul 27, 2014Observed: 11.67 ft at 2:00AM Jul 27, 2014Observed: 11.63 ft at 2:15AM Jul 27, 2014Observed: 11.63 ft at 2:30AM Jul 27, 2014Observed: 11.61 ft at 2:45AM Jul 27, 2014Observed: 11.61 ft at 3:00AM Jul 27, 2014Observed: 11.61 ft at 3:15AM Jul 27, 2014Observed: 11.6 ft at 3:30AM Jul 27, 2014Observed: 11.59 ft at 3:45AM Jul 27, 2014Observed: 11.58 ft at 4:00AM Jul 27, 2014Observed: 11.57 ft at 4:15AM Jul 27, 2014Observed: 11.56 ft at 4:30AM Jul 27, 2014Observed: 11.54 ft at 4:45AM Jul 27, 2014Observed: 11.53 ft at 5:00AM Jul 27, 2014Observed: 11.52 ft at 5:15AM Jul 27, 2014Observed: 11.51 ft at 5:30AM Jul 27, 2014Observed: 11.5 ft at 5:45AM Jul 27, 2014Observed: 11.49 ft at 6:00AM Jul 27, 2014Observed: 11.48 ft at 6:15AM Jul 27, 2014Observed: 11.48 ft at 6:30AM Jul 27, 2014Observed: 11.48 ft at 6:45AM Jul 27, 2014Observed: 11.46 ft at 7:00AM Jul 27, 2014Observed: 11.48 ft at 7:15AM Jul 27, 2014Observed: 11.5 ft at 7:30AM Jul 27, 2014Observed: 11.51 ft at 7:45AM Jul 27, 2014Observed: 11.45 ft at 8:00AM Jul 27, 2014Observed: 11.44 ft at 8:15AM Jul 27, 2014Observed: 11.56 ft at 8:30AM Jul 27, 2014Observed: 11.55 ft at 8:45AM Jul 27, 2014Observed: 11.53 ft at 9:00AM Jul 27, 2014Observed: 11.46 ft at 9:15AM Jul 27, 2014Observed: 11.48 ft at 9:30AM Jul 27, 2014Observed: 11.49 ft at 9:45AM Jul 27, 2014Observed: 11.48 ft at 10:00AM Jul 27, 2014Observed: 11.49 ft at 10:15AM Jul 27, 2014Observed: 11.5 ft at 10:30AM Jul 27, 2014Observed: 11.46 ft at 10:45AM Jul 27, 2014Observed: 11.46 ft at 11:00AM Jul 27, 2014Observed: 11.47 ft at 11:15AM Jul 27, 2014Observed: 11.61 ft at 11:30AM Jul 27, 2014Observed: 11.37 ft at 11:45AM Jul 27, 2014Observed: 11.36 ft at 12:00PM Jul 27, 2014Observed: 11.46 ft at 12:15PM Jul 27, 2014Observed: 11.46 ft at 12:30PM Jul 27, 2014Observed: 11.46 ft at 12:45PM Jul 27, 2014Observed: 11.44 ft at 1:00PM Jul 27, 2014Observed: 11.44 ft at 1:15PM Jul 27, 2014Observed: 11.47 ft at 1:30PM Jul 27, 2014Observed: 11.46 ft at 1:45PM Jul 27, 2014Observed: 11.47 ft at 2:00PM Jul 27, 2014Observed: 11.48 ft at 2:15PM Jul 27, 2014Observed: 11.47 ft at 2:30PM Jul 27, 2014Observed: 11.45 ft at 2:45PM Jul 27, 2014Observed: 11.49 ft at 3:00PM Jul 27, 2014Observed: 11.44 ft at 3:15PM Jul 27, 2014Observed: 11.44 ft at 3:30PM Jul 27, 2014Observed: 11.43 ft at 3:45PM Jul 27, 2014Observed: 11.43 ft at 4:00PM Jul 27, 2014Observed: 11.45 ft at 4:15PM Jul 27, 2014Observed: 11.53 ft at 4:30PM Jul 27, 2014Observed: 11.45 ft at 4:45PM Jul 27, 2014Observed: 11.43 ft at 5:00PM Jul 27, 2014Observed: 11.51 ft at 5:15PM Jul 27, 2014Observed: 11.57 ft at 5:30PM Jul 27, 2014Observed: 11.46 ft at 5:45PM Jul 27, 2014Observed: 11.45 ft at 6:00PM Jul 27, 2014Observed: 11.45 ft at 6:15PM Jul 27, 2014Observed: 11.45 ft at 6:30PM Jul 27, 2014Observed: 11.45 ft at 6:45PM Jul 27, 2014Observed: 11.45 ft at 7:00PM Jul 27, 2014Observed: 11.46 ft at 7:15PM Jul 27, 2014Observed: 11.48 ft at 7:30PM Jul 27, 2014Observed: 11.48 ft at 7:45PM Jul 27, 2014Observed: 11.46 ft at 8:00PM Jul 27, 2014Observed: 11.45 ft at 8:15PM Jul 27, 2014Observed: 11.45 ft at 8:30PM Jul 27, 2014Observed: 11.46 ft at 8:45PM Jul 27, 2014Observed: 11.45 ft at 9:00PM Jul 27, 2014Observed: 11.42 ft at 9:15PM Jul 27, 2014Observed: 11.43 ft at 9:30PM Jul 27, 2014Observed: 11.46 ft at 9:45PM Jul 27, 2014Observed: 11.44 ft at 10:00PM Jul 27, 2014Observed: 11.34 ft at 10:15PM Jul 27, 2014Observed: 11.33 ft at 10:30PM Jul 27, 2014Observed: 11.32 ft at 10:45PM Jul 27, 2014Observed: 11.32 ft at 11:00PM Jul 27, 2014Observed: 11.31 ft at 11:15PM Jul 27, 2014Observed: 11.29 ft at 11:30PM Jul 27, 2014Observed: 11.27 ft at 11:45PM Jul 27, 2014Observed: 11.25 ft at 12:00AM Jul 28, 2014Observed: 11.23 ft at 12:15AM Jul 28, 2014Observed: 11.24 ft at 12:30AM Jul 28, 2014Observed: 11.24 ft at 12:45AM Jul 28, 2014Observed: 11.25 ft at 1:00AM Jul 28, 2014Observed: 11.25 ft at 1:15AM Jul 28, 2014Observed: 11.22 ft at 1:30AM Jul 28, 2014Observed: 11.21 ft at 1:45AM Jul 28, 2014Observed: 11.23 ft at 2:00AM Jul 28, 2014Observed: 11.23 ft at 2:15AM Jul 28, 2014Observed: 11.21 ft at 2:30AM Jul 28, 2014Observed: 11.2 ft at 2:45AM Jul 28, 2014Observed: 11.21 ft at 3:00AM Jul 28, 2014Observed: 11.23 ft at 3:15AM Jul 28, 2014Observed: 11.23 ft at 3:30AM Jul 28, 2014Observed: 11.22 ft at 3:45AM Jul 28, 2014Observed: 11.21 ft at 4:00AM Jul 28, 2014Observed: 11.22 ft at 4:15AM Jul 28, 2014Observed: 11.2 ft at 4:30AM Jul 28, 2014Observed: 11.17 ft at 4:45AM Jul 28, 2014Observed: 11.15 ft at 5:00AM Jul 28, 2014Observed: 11.14 ft at 5:15AM Jul 28, 2014Observed: 11.14 ft at 5:30AM Jul 28, 2014Observed: 11.23 ft at 5:45AM Jul 28, 2014Observed: 11.21 ft at 6:00AM Jul 28, 2014Observed: 11.13 ft at 6:15AM Jul 28, 2014Observed: 11.15 ft at 6:30AM Jul 28, 2014Observed: 11.15 ft at 6:45AM Jul 28, 2014Observed: 11.15 ft at 7:00AM Jul 28, 2014Observed: 11.14 ft at 7:15AM Jul 28, 2014Observed: 11.13 ft at 7:30AM Jul 28, 2014Observed: 11.12 ft at 7:45AM Jul 28, 2014Observed: 11.06 ft at 8:00AM Jul 28, 2014Observed: 11.05 ft at 8:15AM Jul 28, 2014Observed: 11.16 ft at 8:30AM Jul 28, 2014Observed: 11.13 ft at 8:45AM Jul 28, 2014Observed: 11.1 ft at 9:00AM Jul 28, 2014Observed: 11.09 ft at 9:15AM Jul 28, 2014Observed: 11.17 ft at 9:30AM Jul 28, 2014Observed: 11.11 ft at 9:45AM Jul 28, 2014Observed: 11.01 ft at 10:00AM Jul 28, 2014Observed: 11.11 ft at 10:15AM Jul 28, 2014Observed: 11.13 ft at 10:30AM Jul 28, 2014Observed: 11.14 ft at 10:45AM Jul 28, 2014Observed: 11.24 ft at 11:00AM Jul 28, 2014Observed: 11.13 ft at 11:15AM Jul 28, 2014Observed: 11.13 ft at 11:30AM Jul 28, 2014Observed: 11.13 ft at 11:45AM Jul 28, 2014Observed: 11.12 ft at 12:00PM Jul 28, 2014Observed: 11.1 ft at 12:15PM Jul 28, 2014Observed: 11.06 ft at 12:30PM Jul 28, 2014Observed: 11.03 ft at 12:45PM Jul 28, 2014Forecast: 11.1 ft 7:00PM Jul 28, 2014Highest Forecast: 11.2 ft 1:00AM Jul 29, 2014Highest Forecast: 11.2 ft 7:00AM Jul 29, 2014Highest Forecast: 11.2 ft 1:00PM Jul 29, 2014Highest Forecast: 11.2 ft 7:00PM Jul 29, 2014Highest Forecast: 11.2 ft 1:00AM Jul 30, 2014Highest Forecast: 11.2 ft 7:00AM Jul 30, 2014Highest Forecast: 11.2 ft 1:00PM Jul 30, 2014Highest Forecast: 11.2 ft 7:00PM Jul 30, 2014Highest Forecast: 11.2 ft 1:00AM Jul 31, 2014Highest Forecast: 11.2 ft 7:00AM Jul 31, 2014Highest Forecast: 11.2 ft 1:00PM Jul 31, 2014Highest Forecast: 11.2 ft 7:00PM Jul 31, 2014Highest Forecast: 11.2 ft 1:00AM Aug 01, 2014Highest Forecast: 11.2 ft 7:00AM Aug 01, 2014Highest Forecast: 11.2 ft 1:00PM Aug 01, 2014Highest Forecast: 11.2 ft 7:00PM Aug 01, 2014Highest Forecast: 11.2 ft 1:00AM Aug 02, 2014Highest Forecast: 11.2 ft 7:00AM Aug 02, 2014Highest Forecast: 11.2 ft 1:00PM Aug 02, 2014Forecast: 11.1 ft 7:00PM Aug 02, 2014Forecast: 11.1 ft 1:00AM Aug 03, 2014Forecast: 11.1 ft 7:00AM Aug 03, 2014Forecast: 11.1 ft 1:00PM Aug 03, 2014Forecast: 11.1 ft 7:00PM Aug 03, 2014Forecast: 11.1 ft 1:00AM Aug 04, 2014Forecast: 11.1 ft 7:00AM Aug 04, 2014LSLI2(plotting HGIRG) Graph Created (1:20PM Jul 28, 2014)ObservedForecast (issued 10:02AM Jul 28)Latest observed value: 11.03 ft at 12:45 PM CDT 28-Jul-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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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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Page last modified: 16-Jul-2014 2:07 AM
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