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Hydrograph River at a Glance Download
Illinois River at Marseilles lock/dam Tailwater (ft)Flow (kcfs)Highest Observation: 466.13 ft at 9:00AM Jul 01, 2015Observed: 466.12 ft at 9:30AM Jul 01, 2015Observed: 466.1 ft at 10:00AM Jul 01, 2015Observed: 466.08 ft at 10:30AM Jul 01, 2015Observed: 466.06 ft at 11:00AM Jul 01, 2015Observed: 466.03 ft at 11:30AM Jul 01, 2015Observed: 466.02 ft at 12:00PM Jul 01, 2015Observed: 465.99 ft at 12:30PM Jul 01, 2015Observed: 465.9 ft at 1:00PM Jul 01, 2015Observed: 465.84 ft at 1:30PM Jul 01, 2015Observed: 465.81 ft at 2:00PM Jul 01, 2015Observed: 465.79 ft at 2:30PM Jul 01, 2015Observed: 465.77 ft at 3:00PM Jul 01, 2015Observed: 465.74 ft at 3:30PM Jul 01, 2015Observed: 465.69 ft at 4:00PM Jul 01, 2015Observed: 465.65 ft at 4:30PM Jul 01, 2015Observed: 465.62 ft at 5:00PM Jul 01, 2015Observed: 465.6 ft at 5:30PM Jul 01, 2015Observed: 465.58 ft at 6:00PM Jul 01, 2015Observed: 465.56 ft at 6:30PM Jul 01, 2015Observed: 465.54 ft at 7:00PM Jul 01, 2015Observed: 465.52 ft at 7:30PM Jul 01, 2015Observed: 465.47 ft at 8:00PM Jul 01, 2015Observed: 465.41 ft at 8:30PM Jul 01, 2015Observed: 465.34 ft at 9:00PM Jul 01, 2015Observed: 465.31 ft at 9:30PM Jul 01, 2015Observed: 465.29 ft at 10:00PM Jul 01, 2015Observed: 465.27 ft at 10:30PM Jul 01, 2015Observed: 465.25 ft at 11:00PM Jul 01, 2015Observed: 465.23 ft at 11:30PM Jul 01, 2015Observed: 465.22 ft at 12:00AM Jul 02, 2015Observed: 465.18 ft at 12:30AM Jul 02, 2015Observed: 465.14 ft at 1:00AM Jul 02, 2015Observed: 465.08 ft at 1:30AM Jul 02, 2015Observed: 465.06 ft at 2:00AM Jul 02, 2015Observed: 465.03 ft at 2:30AM Jul 02, 2015Observed: 465.01 ft at 3:00AM Jul 02, 2015Observed: 464.94 ft at 3:30AM Jul 02, 2015Observed: 464.83 ft at 4:00AM Jul 02, 2015Observed: 464.77 ft at 4:30AM Jul 02, 2015Observed: 464.74 ft at 5:00AM Jul 02, 2015Observed: 464.72 ft at 5:30AM Jul 02, 2015Observed: 464.7 ft at 6:00AM Jul 02, 2015Observed: 464.68 ft at 6:30AM Jul 02, 2015Observed: 464.66 ft at 7:00AM Jul 02, 2015Observed: 464.64 ft at 7:30AM Jul 02, 2015Observed: 464.61 ft at 8:00AM Jul 02, 2015Observed: 464.58 ft at 8:30AM Jul 02, 2015Observed: 464.55 ft at 9:00AM Jul 02, 2015Observed: 464.52 ft at 9:30AM Jul 02, 2015Observed: 464.49 ft at 10:00AM Jul 02, 2015Observed: 464.42 ft at 10:30AM Jul 02, 2015Observed: 464.34 ft at 11:00AM Jul 02, 2015Observed: 464.28 ft at 11:30AM Jul 02, 2015Observed: 464.24 ft at 12:00PM Jul 02, 2015Observed: 464.26 ft at 12:30PM Jul 02, 2015Observed: 464.17 ft at 1:00PM Jul 02, 2015Observed: 464.11 ft at 1:30PM Jul 02, 2015Observed: 464.08 ft at 2:00PM Jul 02, 2015Observed: 464.06 ft at 2:30PM Jul 02, 2015Observed: 464.04 ft at 3:00PM Jul 02, 2015Observed: 464.02 ft at 3:30PM Jul 02, 2015Observed: 464 ft at 4:00PM Jul 02, 2015Observed: 463.99 ft at 4:30PM Jul 02, 2015Observed: 463.99 ft at 5:00PM Jul 02, 2015Observed: 463.97 ft at 5:30PM Jul 02, 2015Observed: 463.97 ft at 6:00PM Jul 02, 2015Observed: 463.82 ft at 6:30PM Jul 02, 2015Observed: 463.76 ft at 7:00PM Jul 02, 2015Observed: 463.73 ft at 7:30PM Jul 02, 2015Observed: 463.72 ft at 8:00PM Jul 02, 2015Observed: 463.7 ft at 8:30PM Jul 02, 2015Observed: 463.68 ft at 9:00PM Jul 02, 2015Observed: 463.67 ft at 9:30PM Jul 02, 2015Observed: 463.67 ft at 10:00PM Jul 02, 2015Observed: 463.67 ft at 10:30PM Jul 02, 2015Observed: 463.66 ft at 11:00PM Jul 02, 2015Observed: 463.65 ft at 11:30PM Jul 02, 2015Observed: 463.64 ft at 12:00AM Jul 03, 2015Observed: 463.58 ft at 12:30AM Jul 03, 2015Observed: 463.54 ft at 1:00AM Jul 03, 2015Observed: 463.51 ft at 1:30AM Jul 03, 2015Observed: 463.44 ft at 2:00AM Jul 03, 2015Observed: 463.35 ft at 2:30AM Jul 03, 2015Observed: 463.29 ft at 3:00AM Jul 03, 2015Observed: 463.4 ft at 3:30AM Jul 03, 2015Observed: 463.24 ft at 4:00AM Jul 03, 2015Observed: 463.24 ft at 4:30AM Jul 03, 2015Observed: 463.19 ft at 5:00AM Jul 03, 2015Observed: 463.16 ft at 5:30AM Jul 03, 2015Observed: 463.16 ft at 6:00AM Jul 03, 2015Observed: 463.28 ft at 6:30AM Jul 03, 2015Observed: 463.16 ft at 7:00AM Jul 03, 2015Observed: 463.12 ft at 7:30AM Jul 03, 2015Observed: 463.12 ft at 8:00AM Jul 03, 2015Observed: 463.07 ft at 8:30AM Jul 03, 2015Observed: 463.04 ft at 9:00AM Jul 03, 2015Observed: 463.39 ft at 9:30AM Jul 03, 2015Observed: 463.14 ft at 10:00AM Jul 03, 2015Observed: 463.11 ft at 10:30AM Jul 03, 2015Observed: 463.02 ft at 11:00AM Jul 03, 2015Observed: 463.06 ft at 11:30AM Jul 03, 2015Observed: 463.33 ft at 12:00PM Jul 03, 2015Observed: 463.16 ft at 12:30PM Jul 03, 2015Observed: 463.18 ft at 1:00PM Jul 03, 2015Observed: 463.14 ft at 1:30PM Jul 03, 2015Observed: 463.12 ft at 2:00PM Jul 03, 2015Observed: 463.16 ft at 2:30PM Jul 03, 2015Observed: 463.27 ft at 3:00PM Jul 03, 2015Observed: 463.22 ft at 3:30PM Jul 03, 2015Observed: 463.16 ft at 4:00PM Jul 03, 2015Observed: 463.12 ft at 4:30PM Jul 03, 2015Observed: 463.1 ft at 5:00PM Jul 03, 2015Observed: 463.1 ft at 5:30PM Jul 03, 2015Observed: 463.18 ft at 6:00PM Jul 03, 2015Observed: 463.11 ft at 6:30PM Jul 03, 2015Observed: 463.15 ft at 7:00PM Jul 03, 2015Observed: 463.08 ft at 7:30PM Jul 03, 2015Observed: 463.02 ft at 8:00PM Jul 03, 2015Observed: 463.02 ft at 8:30PM Jul 03, 2015Observed: 463.12 ft at 9:00PM Jul 03, 2015Observed: 463.01 ft at 9:30PM Jul 03, 2015Observed: 462.98 ft at 10:00PM Jul 03, 2015Observed: 462.87 ft at 10:30PM Jul 03, 2015Observed: 462.8 ft at 11:00PM Jul 03, 2015Observed: 462.63 ft at 11:30PM Jul 03, 2015Observed: 462.59 ft at 12:00AM Jul 04, 2015Observed: 462.52 ft at 12:30AM Jul 04, 2015Observed: 462.56 ft at 1:00AM Jul 04, 2015Observed: 462.66 ft at 1:30AM Jul 04, 2015Observed: 462.63 ft at 2:00AM Jul 04, 2015Observed: 462.6 ft at 2:30AM Jul 04, 2015Observed: 462.57 ft at 3:00AM Jul 04, 2015Observed: 462.54 ft at 3:30AM Jul 04, 2015Observed: 462.6 ft at 4:00AM Jul 04, 2015Observed: 462.56 ft at 4:30AM Jul 04, 2015Observed: 462.72 ft at 5:00AM Jul 04, 2015Observed: 462.58 ft at 5:30AM Jul 04, 2015Observed: 462.58 ft at 6:00AM Jul 04, 2015Observed: 462.62 ft at 6:30AM Jul 04, 2015Observed: 462.69 ft at 7:00AM Jul 04, 2015Observed: 462.81 ft at 7:30AM Jul 04, 2015Highest Forecast: 462.3 ft 1:00PM Jul 04, 2015Forecast: 462.1 ft 7:00PM Jul 04, 2015Forecast: 461.8 ft 1:00AM Jul 05, 2015Forecast: 461.6 ft 7:00AM Jul 05, 2015Forecast: 461.5 ft 1:00PM Jul 05, 2015Forecast: 461.3 ft 7:00PM Jul 05, 2015Forecast: 461.2 ft 1:00AM Jul 06, 2015Forecast: 461 ft 7:00AM Jul 06, 2015Forecast: 461 ft 1:00PM Jul 06, 2015Forecast: 460.9 ft 7:00PM Jul 06, 2015Forecast: 460.9 ft 1:00AM Jul 07, 2015Forecast: 460.8 ft 7:00AM Jul 07, 2015Forecast: 460.8 ft 1:00PM Jul 07, 2015Forecast: 460.7 ft 7:00PM Jul 07, 2015Forecast: 460.7 ft 1:00AM Jul 08, 2015Forecast: 460.7 ft 7:00AM Jul 08, 2015Forecast: 460.7 ft 1:00PM Jul 08, 2015Forecast: 460.6 ft 7:00PM Jul 08, 2015Forecast: 460.6 ft 1:00AM Jul 09, 2015Forecast: 460.5 ft 7:00AM Jul 09, 2015Forecast: 460.5 ft 1:00PM Jul 09, 2015Forecast: 460.5 ft 7:00PM Jul 09, 2015Forecast: 460.4 ft 1:00AM Jul 10, 2015Forecast: 460.4 ft 7:00AM Jul 10, 2015Forecast: 460.3 ft 1:00PM Jul 10, 2015Forecast: 460.3 ft 7:00PM Jul 10, 2015Forecast: 460.3 ft 1:00AM Jul 11, 2015Forecast: 460.3 ft 7:00AM Jul 11, 2015MMOI2(plotting HTIRG) Graph Created (8:36AM Jul 4, 2015)ObservedForecast (issued 8:23AM Jul 4)Latest observed value: 462.81 ft at 7:30 AM CDT 4-Jul-2015.
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Tabular Data (UTC)
Tabular Data (CDT)
XML Data
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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 at Marseilles lock/dam are issued routinely year-round.

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Flood Categories (in feet)
Not Available

Historic Crests
Currently none available.

Recent Crests
Currently none available.

Low Water Records
Currently none available.

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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.
About This Location Collapse

Latitude: 41.325000° N, Longitude: 88.706944° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 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 0 ft 485.6 ft  

Current/Historical Observations:

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