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Hydrograph River at a Glance Download
Mississippi River at Illinois City Tailwater (ft)Flow (kcfs)Observed: 11.45 ft at 10:00PM Sep 23, 2016Observed: 11.46 ft at 12:00AM Sep 24, 2016Observed: 11.45 ft at 2:00AM Sep 24, 2016Observed: 11.47 ft at 4:00AM Sep 24, 2016Observed: 11.46 ft at 6:00AM Sep 24, 2016Observed: 11.47 ft at 8:00AM Sep 24, 2016Observed: 11.42 ft at 10:00AM Sep 24, 2016Observed: 11.44 ft at 12:00PM Sep 24, 2016Observed: 11.4 ft at 2:00PM Sep 24, 2016Observed: 11.39 ft at 4:00PM Sep 24, 2016Observed: 11.41 ft at 6:00PM Sep 24, 2016Observed: 11.41 ft at 8:00PM Sep 24, 2016Observed: 11.43 ft at 10:00PM Sep 24, 2016Observed: 11.47 ft at 12:00AM Sep 25, 2016Observed: 11.49 ft at 2:00AM Sep 25, 2016Observed: 11.51 ft at 4:00AM Sep 25, 2016Observed: 11.57 ft at 6:00AM Sep 25, 2016Observed: 11.63 ft at 8:00AM Sep 25, 2016Observed: 11.68 ft at 10:00AM Sep 25, 2016Observed: 11.72 ft at 12:00PM Sep 25, 2016Observed: 11.79 ft at 2:00PM Sep 25, 2016Observed: 11.89 ft at 4:00PM Sep 25, 2016Observed: 11.95 ft at 6:00PM Sep 25, 2016Observed: 12.12 ft at 8:00PM Sep 25, 2016Observed: 12.17 ft at 10:00PM Sep 25, 2016Observed: 12.28 ft at 12:00AM Sep 26, 2016Observed: 12.39 ft at 2:00AM Sep 26, 2016Observed: 12.47 ft at 4:00AM Sep 26, 2016Observed: 12.55 ft at 6:00AM Sep 26, 2016Observed: 12.64 ft at 8:00AM Sep 26, 2016Observed: 12.71 ft at 10:00AM Sep 26, 2016Observed: 12.81 ft at 12:00PM Sep 26, 2016Observed: 12.92 ft at 2:00PM Sep 26, 2016Observed: 13.02 ft at 4:00PM Sep 26, 2016Observed: 13.18 ft at 6:00PM Sep 26, 2016Highest Observation: 13.34 ft at 8:00PM Sep 26, 2016Forecast: 13.4 ft 1:00AM Sep 27, 2016Forecast: 13.7 ft 7:00AM Sep 27, 2016Forecast: 13.9 ft 1:00PM Sep 27, 2016Forecast: 14.1 ft 7:00PM Sep 27, 2016Forecast: 14.3 ft 1:00AM Sep 28, 2016Forecast: 14.5 ft 7:00AM Sep 28, 2016Forecast: 14.7 ft 1:00PM Sep 28, 2016Forecast: 14.8 ft 7:00PM Sep 28, 2016Forecast: 15 ft 1:00AM Sep 29, 2016Forecast: 15.2 ft 7:00AM Sep 29, 2016Forecast: 15.3 ft 1:00PM Sep 29, 2016Forecast: 15.5 ft 7:00PM Sep 29, 2016Forecast: 15.7 ft 1:00AM Sep 30, 2016Forecast: 15.9 ft 7:00AM Sep 30, 2016Forecast: 16.1 ft 1:00PM Sep 30, 2016Forecast: 16.3 ft 7:00PM Sep 30, 2016Forecast: 16.5 ft 1:00AM Oct 01, 2016Forecast: 16.7 ft 7:00AM Oct 01, 2016Forecast: 16.8 ft 1:00PM Oct 01, 2016Forecast: 16.9 ft 7:00PM Oct 01, 2016Forecast: 17 ft 1:00AM Oct 02, 2016Forecast: 17 ft 7:00AM Oct 02, 2016Highest Forecast: 17.1 ft 1:00PM Oct 02, 2016Forecast: 17 ft 7:00PM Oct 02, 2016Forecast: 16.9 ft 1:00AM Oct 03, 2016Forecast: 16.8 ft 7:00AM Oct 03, 2016U.S. Army Corps of EngineersILNI2(plotting HTIRZ) Graph Created (8:47PM Sep 26, 2016)ObservedForecast (issued 11:18AM Sep 26)Latest observed value: 13.34 ft at 8:00 PM CDT 26-Sep-2016. Flood Stage is 15 ft
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Tabular Data (UTC)
Tabular Data (CDT)
XML Data
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Datum: Not Available
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 Mississippi River at Illinois City are issued routinely year-round.

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Upstream Gauge - at Rock Island Upstream Gauge Downstream Gauge Downstream Gauge - at Muscatine
Flood Categories (in feet)
Major Flood Stage: 18
Moderate Flood Stage: 16
Flood Stage: 15
Action Stage: 14
Low Stage (in feet): 0

Historic Crests
(1) 24.10 ft on 07/09/1993
(2) 23.27 ft on 04/28/1965
(3) 22.96 ft on 06/17/2008
(4) 22.41 ft on 04/25/2001
(5) 22.29 ft on 07/05/2014 (P)
(6) 20.74 ft on 04/23/2011
(7) 20.29 ft on 04/22/2013 (P)
(8) 20.05 ft on 04/25/1973
(9) 19.94 ft on 05/01/2008
(10) 19.69 ft on 04/26/1969
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(P): Preliminary values subject to further review.

Recent Crests
(1) 22.29 ft on 07/05/2014 (P)
(2) 15.72 ft on 05/23/2014 (P)
(3) 16.15 ft on 05/14/2014 (P)
(4) 18.47 ft on 07/02/2013 (P)
(5) 15.73 ft on 05/15/2013 (P)
(6) 20.29 ft on 04/22/2013 (P)
(7) 20.74 ft on 04/23/2011
(8) 22.96 ft on 06/17/2008
(9) 19.94 ft on 05/01/2008
(10) 16.68 ft on 06/23/2004
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

Zoom Level:16
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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.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
29 Water reaches the top of the Milan levee.
24.5 Water reaches the top of the Andalusia levee.
22.5 Water affects the entire state park at Fairport and is at the foundations of facilities there.
21.5 Water affects the Post Office and several commercial buildings in Buffalo.
20.5 Water affects Front Street and several homes in Buffalo. Water also affects the fish hatchery at Fairport.
20 Water affects Buffalos Front Street at Franklin and on Iowa Highway 22 west of town. Water affects Illinois Highway 92 west of Andalusia.
19.5 Water affects Buffalos Franklin Street and into some yards from seepage. At Buffalo Shores, water is at the foundations of several homes.
19 Water affects the Clarks Ferry Recreational Area at Montpelier.
18.5 Water floods Andalusias Second Street in the unprotected area. Water is also at the foundations of several homes in Midway Beach.
18 Water affects the state park campground at Fairport.
17 Water affects the Buffalo Shores Access Area.
16.98 Lock and Dam 16 is closed.
16 Water affects the park at Andalusia.
13 Water affects residents on Smiths Island.
About This Location Collapse

Latitude: 41.425556° N, Longitude: 91.012778° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 15 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(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 533.79 ft 548.79 ft  

Current/Historical Observations:

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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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Davenport, IA 52806-7326
(563) 386-3976
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Page last modified: 13-Aug-2015 1:56 AM
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