Skip Navigation Link weather.gov  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left Home News Organization
Bookmark and Share Navigation Bar End Cap

  

National Conditions
    Rivers
    Satellite
    Climate
    Observed Precip

Local Conditions
    Warnings
    Weather Forecast
    Radar

AHPS Documentation
    User Guide
    User Brochure

What is AHPS?
    Facts
    Our Partners

Feedback/Questions
     Provide Feedback
    Ask Questions

When flooded turn around don't drown
FloodSmart
USA.gov Official Web Portal
 
Hydrograph River at a Glance Download
Illinois River at Starved Rock Lock (tailwater) Tailwater (ft)Flow (kcfs)Observed: 445.96 ft at 3:00AM Jan 13, 2019Observed: 445.94 ft at 3:30AM Jan 13, 2019Observed: 445.97 ft at 4:00AM Jan 13, 2019Observed: 445.99 ft at 4:30AM Jan 13, 2019Observed: 445.98 ft at 5:00AM Jan 13, 2019Observed: 445.98 ft at 5:30AM Jan 13, 2019Observed: 445.94 ft at 6:00AM Jan 13, 2019Observed: 445.95 ft at 6:30AM Jan 13, 2019Observed: 445.93 ft at 7:00AM Jan 13, 2019Observed: 445.91 ft at 7:30AM Jan 13, 2019Observed: 445.89 ft at 8:00AM Jan 13, 2019Observed: 445.97 ft at 8:30AM Jan 13, 2019Observed: 445.9 ft at 9:00AM Jan 13, 2019Observed: 445.9 ft at 9:30AM Jan 13, 2019Observed: 445.64 ft at 10:00AM Jan 13, 2019Observed: 445.59 ft at 10:30AM Jan 13, 2019Observed: 445.59 ft at 11:00AM Jan 13, 2019Observed: 445.46 ft at 11:30AM Jan 13, 2019Observed: 445.5 ft at 12:00PM Jan 13, 2019Observed: 445.38 ft at 12:30PM Jan 13, 2019Observed: 445.34 ft at 1:00PM Jan 13, 2019Observed: 445.44 ft at 1:30PM Jan 13, 2019Observed: 445.68 ft at 2:00PM Jan 13, 2019Observed: 445.35 ft at 2:30PM Jan 13, 2019Observed: 445.35 ft at 3:00PM Jan 13, 2019Observed: 445.33 ft at 3:30PM Jan 13, 2019Observed: 445.48 ft at 4:00PM Jan 13, 2019Observed: 445.56 ft at 4:30PM Jan 13, 2019Observed: 445.6 ft at 5:00PM Jan 13, 2019Observed: 445.54 ft at 5:30PM Jan 13, 2019Observed: 445.66 ft at 6:00PM Jan 13, 2019Observed: 445.93 ft at 6:30PM Jan 13, 2019Observed: 445.95 ft at 7:00PM Jan 13, 2019Observed: 446.01 ft at 7:30PM Jan 13, 2019Observed: 446.05 ft at 8:00PM Jan 13, 2019Observed: 446.06 ft at 8:30PM Jan 13, 2019Observed: 446.09 ft at 9:00PM Jan 13, 2019Observed: 446.12 ft at 9:30PM Jan 13, 2019Highest Observation: 446.15 ft at 10:00PM Jan 13, 2019Observed: 446 ft at 10:30PM Jan 13, 2019Observed: 445.91 ft at 11:00PM Jan 13, 2019Observed: 445.86 ft at 11:30PM Jan 13, 2019Observed: 445.84 ft at 12:00AM Jan 14, 2019Observed: 445.49 ft at 12:30AM Jan 14, 2019Observed: 444.09 ft at 1:00AM Jan 14, 2019Observed: 442.39 ft at 1:30AM Jan 14, 2019Observed: 441.1 ft at 2:00AM Jan 14, 2019Observed: 440.28 ft at 2:30AM Jan 14, 2019Observed: 439.86 ft at 3:00AM Jan 14, 2019Observed: 439.67 ft at 3:30AM Jan 14, 2019Observed: 439.61 ft at 4:00AM Jan 14, 2019Observed: 439.65 ft at 4:30AM Jan 14, 2019Observed: 440.07 ft at 5:00AM Jan 14, 2019Observed: 440.46 ft at 5:30AM Jan 14, 2019Observed: 441.04 ft at 6:00AM Jan 14, 2019Observed: 441.73 ft at 6:30AM Jan 14, 2019Observed: 442.75 ft at 7:00AM Jan 14, 2019Observed: 443.88 ft at 7:30AM Jan 14, 2019Observed: 445.22 ft at 8:00AM Jan 14, 2019Observed: 445.35 ft at 8:30AM Jan 14, 2019Observed: 445.2 ft at 9:00AM Jan 14, 2019Observed: 445.19 ft at 9:30AM Jan 14, 2019Observed: 445.19 ft at 10:00AM Jan 14, 2019Observed: 445.18 ft at 10:30AM Jan 14, 2019Observed: 445.16 ft at 11:00AM Jan 14, 2019Observed: 445.15 ft at 11:30AM Jan 14, 2019Observed: 445.13 ft at 12:00PM Jan 14, 2019Observed: 445.13 ft at 12:30PM Jan 14, 2019Observed: 445.15 ft at 1:00PM Jan 14, 2019Observed: 445.36 ft at 1:30PM Jan 14, 2019Observed: 445.25 ft at 2:00PM Jan 14, 2019Observed: 445.28 ft at 2:30PM Jan 14, 2019Observed: 445.28 ft at 3:00PM Jan 14, 2019Observed: 445.37 ft at 3:30PM Jan 14, 2019Observed: 445.38 ft at 4:00PM Jan 14, 2019Observed: 445.32 ft at 4:30PM Jan 14, 2019Observed: 445.31 ft at 5:00PM Jan 14, 2019Observed: 445.31 ft at 5:30PM Jan 14, 2019Observed: 445.3 ft at 6:00PM Jan 14, 2019Observed: 445.3 ft at 6:30PM Jan 14, 2019Observed: 445.29 ft at 7:00PM Jan 14, 2019Observed: 445.27 ft at 7:30PM Jan 14, 2019Observed: 445.3 ft at 8:00PM Jan 14, 2019Observed: 445.36 ft at 8:30PM Jan 14, 2019Observed: 445.18 ft at 9:00PM Jan 14, 2019Observed: 445.28 ft at 9:30PM Jan 14, 2019Observed: 445.31 ft at 10:00PM Jan 14, 2019Observed: 445.31 ft at 10:30PM Jan 14, 2019Observed: 445.27 ft at 11:00PM Jan 14, 2019Observed: 445.28 ft at 11:30PM Jan 14, 2019Observed: 445.3 ft at 12:00AM Jan 15, 2019Observed: 445.28 ft at 12:30AM Jan 15, 2019Observed: 445.26 ft at 1:00AM Jan 15, 2019Observed: 445.28 ft at 1:30AM Jan 15, 2019Observed: 445.3 ft at 2:00AM Jan 15, 2019Observed: 445.29 ft at 2:30AM Jan 15, 2019Observed: 445.54 ft at 3:00AM Jan 15, 2019Observed: 445.22 ft at 3:30AM Jan 15, 2019Observed: 445.27 ft at 4:00AM Jan 15, 2019Observed: 445.22 ft at 4:30AM Jan 15, 2019Observed: 445.22 ft at 5:00AM Jan 15, 2019Observed: 445.2 ft at 5:30AM Jan 15, 2019Observed: 445.36 ft at 6:00AM Jan 15, 2019Observed: 445.25 ft at 6:30AM Jan 15, 2019Observed: 445.21 ft at 7:00AM Jan 15, 2019Observed: 445.22 ft at 7:30AM Jan 15, 2019Observed: 445.22 ft at 8:00AM Jan 15, 2019Observed: 445.22 ft at 8:30AM Jan 15, 2019Observed: 445.19 ft at 9:00AM Jan 15, 2019Observed: 445.19 ft at 9:30AM Jan 15, 2019Observed: 445.2 ft at 10:00AM Jan 15, 2019Observed: 445.19 ft at 10:30AM Jan 15, 2019Observed: 445.18 ft at 11:00AM Jan 15, 2019Observed: 445.19 ft at 11:30AM Jan 15, 2019Observed: 445.17 ft at 12:00PM Jan 15, 2019Observed: 445.2 ft at 12:30PM Jan 15, 2019Observed: 445.22 ft at 1:00PM Jan 15, 2019Observed: 445.25 ft at 1:30PM Jan 15, 2019Observed: 445.24 ft at 2:00PM Jan 15, 2019Observed: 445.26 ft at 2:30PM Jan 15, 2019Observed: 445.23 ft at 3:00PM Jan 15, 2019Observed: 445.19 ft at 3:30PM Jan 15, 2019Observed: 445.19 ft at 4:00PM Jan 15, 2019Observed: 445.2 ft at 4:30PM Jan 15, 2019Observed: 445.12 ft at 5:00PM Jan 15, 2019Observed: 445.24 ft at 5:30PM Jan 15, 2019Observed: 445.19 ft at 6:00PM Jan 15, 2019Observed: 445.27 ft at 6:30PM Jan 15, 2019Observed: 445.23 ft at 7:00PM Jan 15, 2019Observed: 445.34 ft at 7:30PM Jan 15, 2019Observed: 445.23 ft at 8:00PM Jan 15, 2019Observed: 445.37 ft at 8:30PM Jan 15, 2019Observed: 445.44 ft at 9:00PM Jan 15, 2019Observed: 445.11 ft at 9:30PM Jan 15, 2019Observed: 445.09 ft at 10:00PM Jan 15, 2019Observed: 445.04 ft at 10:30PM Jan 15, 2019Observed: 445.01 ft at 11:00PM Jan 15, 2019Observed: 444.99 ft at 11:30PM Jan 15, 2019Observed: 445.01 ft at 12:00AM Jan 16, 2019Observed: 444.94 ft at 12:30AM Jan 16, 2019Observed: 444.87 ft at 1:00AM Jan 16, 2019Observed: 444.87 ft at 1:30AM Jan 16, 2019Observed: 444.88 ft at 2:00AM Jan 16, 2019Observed: 444.88 ft at 2:30AM Jan 16, 2019Observed: 444.91 ft at 3:00AM Jan 16, 2019Observed: 445.01 ft at 3:30AM Jan 16, 2019Observed: 444.83 ft at 4:00AM Jan 16, 2019Observed: 444.81 ft at 4:30AM Jan 16, 2019Observed: 444.8 ft at 5:00AM Jan 16, 2019Observed: 444.83 ft at 5:30AM Jan 16, 2019Observed: 444.8 ft at 6:00AM Jan 16, 2019Observed: 444.74 ft at 6:30AM Jan 16, 2019Observed: 444.74 ft at 7:00AM Jan 16, 2019Observed: 444.72 ft at 7:30AM Jan 16, 2019Observed: 444.71 ft at 8:00AM Jan 16, 2019Observed: 444.68 ft at 8:30AM Jan 16, 2019Observed: 444.7 ft at 9:00AM Jan 16, 2019Observed: 444.69 ft at 9:30AM Jan 16, 2019Observed: 444.65 ft at 10:00AM Jan 16, 2019Observed: 444.68 ft at 10:30AM Jan 16, 2019Observed: 444.65 ft at 11:00AM Jan 16, 2019Observed: 444.74 ft at 11:30AM Jan 16, 2019Observed: 444.77 ft at 12:00PM Jan 16, 2019Observed: 444.87 ft at 12:30PM Jan 16, 2019Observed: 444.95 ft at 1:00PM Jan 16, 2019Observed: 444.95 ft at 1:30PM Jan 16, 2019Observed: 444.92 ft at 2:00PM Jan 16, 2019Observed: 444.92 ft at 2:30PM Jan 16, 2019Observed: 444.9 ft at 3:00PM Jan 16, 2019Observed: 444.9 ft at 3:30PM Jan 16, 2019Observed: 444.86 ft at 4:00PM Jan 16, 2019Observed: 444.92 ft at 4:30PM Jan 16, 2019Observed: 444.97 ft at 5:00PM Jan 16, 2019Observed: 444.85 ft at 5:30PM Jan 16, 2019Observed: 444.85 ft at 6:00PM Jan 16, 2019Observed: 444.94 ft at 6:30PM Jan 16, 2019Observed: 444.87 ft at 7:00PM Jan 16, 2019Observed: 444.88 ft at 7:30PM Jan 16, 2019Observed: 444.89 ft at 8:00PM Jan 16, 2019Observed: 444.94 ft at 8:30PM Jan 16, 2019Observed: 444.84 ft at 9:00PM Jan 16, 2019Observed: 444.88 ft at 9:30PM Jan 16, 2019Observed: 444.86 ft at 10:00PM Jan 16, 2019Observed: 444.84 ft at 10:30PM Jan 16, 2019Observed: 444.85 ft at 11:00PM Jan 16, 2019Observed: 444.81 ft at 11:30PM Jan 16, 2019Observed: 444.82 ft at 12:00AM Jan 17, 2019Observed: 444.8 ft at 12:30AM Jan 17, 2019Observed: 444.68 ft at 1:00AM Jan 17, 2019Observed: 444.66 ft at 1:30AM Jan 17, 2019Observed: 444.63 ft at 2:00AM Jan 17, 2019Observed: 444.61 ft at 2:30AM Jan 17, 2019Observed: 444.6 ft at 3:00AM Jan 17, 2019Observed: 444.68 ft at 3:30AM Jan 17, 2019Observed: 444.58 ft at 4:00AM Jan 17, 2019Observed: 444.54 ft at 4:30AM Jan 17, 2019Observed: 444.55 ft at 5:00AM Jan 17, 2019Observed: 444.54 ft at 5:30AM Jan 17, 2019Observed: 444.65 ft at 6:00AM Jan 17, 2019Observed: 444.59 ft at 6:30AM Jan 17, 2019Observed: 444.53 ft at 7:00AM Jan 17, 2019Observed: 444.53 ft at 7:30AM Jan 17, 2019Observed: 444.63 ft at 8:00AM Jan 17, 2019Observed: 444.51 ft at 8:30AM Jan 17, 2019Observed: 444.51 ft at 9:00AM Jan 17, 2019Observed: 444.6 ft at 9:30AM Jan 17, 2019Observed: 444.5 ft at 10:00AM Jan 17, 2019Observed: 444.49 ft at 10:30AM Jan 17, 2019Observed: 444.35 ft at 11:00AM Jan 17, 2019Observed: 444.48 ft at 11:30AM Jan 17, 2019Observed: 444.44 ft at 12:00PM Jan 17, 2019Observed: 444.46 ft at 12:30PM Jan 17, 2019Observed: 444.42 ft at 1:00PM Jan 17, 2019Observed: 444.44 ft at 1:30PM Jan 17, 2019Observed: 444.45 ft at 2:00PM Jan 17, 2019Observed: 444.45 ft at 2:30PM Jan 17, 2019Observed: 444.42 ft at 3:00PM Jan 17, 2019Observed: 444.37 ft at 3:30PM Jan 17, 2019Observed: 444.32 ft at 4:00PM Jan 17, 2019Observed: 444.2 ft at 4:30PM Jan 17, 2019Observed: 444.18 ft at 5:00PM Jan 17, 2019Observed: 444.16 ft at 5:30PM Jan 17, 2019Observed: 444.11 ft at 6:00PM Jan 17, 2019Observed: 444.05 ft at 6:30PM Jan 17, 2019Observed: 443.98 ft at 7:00PM Jan 17, 2019Observed: 443.93 ft at 7:30PM Jan 17, 2019Observed: 443.98 ft at 8:00PM Jan 17, 2019Observed: 444.04 ft at 8:30PM Jan 17, 2019Observed: 443.91 ft at 9:00PM Jan 17, 2019Observed: 443.95 ft at 9:30PM Jan 17, 2019Observed: 443.88 ft at 10:00PM Jan 17, 2019Observed: 443.92 ft at 10:30PM Jan 17, 2019Observed: 443.9 ft at 11:00PM Jan 17, 2019Observed: 444.05 ft at 11:30PM Jan 17, 2019Observed: 444.21 ft at 12:00AM Jan 18, 2019Observed: 444.03 ft at 12:30AM Jan 18, 2019Observed: 444.12 ft at 1:00AM Jan 18, 2019Observed: 444.15 ft at 1:30AM Jan 18, 2019Observed: 444.15 ft at 2:00AM Jan 18, 2019Observed: 444.16 ft at 2:30AM Jan 18, 2019Observed: 444.17 ft at 3:00AM Jan 18, 2019Observed: 444.2 ft at 3:30AM Jan 18, 2019Observed: 444.2 ft at 4:00AM Jan 18, 2019Observed: 444.16 ft at 4:30AM Jan 18, 2019Observed: 444.15 ft at 5:00AM Jan 18, 2019Observed: 444.17 ft at 5:30AM Jan 18, 2019Observed: 444.16 ft at 6:00AM Jan 18, 2019Observed: 444.16 ft at 6:30AM Jan 18, 2019Observed: 444.16 ft at 7:00AM Jan 18, 2019Observed: 444.16 ft at 7:30AM Jan 18, 2019Observed: 444.18 ft at 8:00AM Jan 18, 2019Observed: 444.33 ft at 8:30AM Jan 18, 2019Observed: 444.2 ft at 9:00AM Jan 18, 2019Observed: 444.41 ft at 9:30AM Jan 18, 2019Observed: 444.45 ft at 10:00AM Jan 18, 2019Observed: 444.47 ft at 10:30AM Jan 18, 2019Observed: 444.45 ft at 11:00AM Jan 18, 2019Observed: 444.48 ft at 11:30AM Jan 18, 2019Observed: 444.47 ft at 12:00PM Jan 18, 2019Observed: 444.52 ft at 12:30PM Jan 18, 2019Observed: 444.48 ft at 1:00PM Jan 18, 2019Observed: 444.31 ft at 1:30PM Jan 18, 2019Observed: 444.38 ft at 2:00PM Jan 18, 2019Observed: 444.26 ft at 2:30PM Jan 18, 2019Observed: 444.24 ft at 3:00PM Jan 18, 2019Observed: 444.2 ft at 3:30PM Jan 18, 2019Observed: 444.21 ft at 4:00PM Jan 18, 2019Observed: 444.17 ft at 4:30PM Jan 18, 2019Observed: 444.16 ft at 5:00PM Jan 18, 2019Observed: 444.19 ft at 5:30PM Jan 18, 2019Observed: 444.12 ft at 6:00PM Jan 18, 2019Observed: 444.12 ft at 6:30PM Jan 18, 2019Observed: 444.18 ft at 7:00PM Jan 18, 2019Observed: 444.22 ft at 7:30PM Jan 18, 2019Observed: 444.17 ft at 8:00PM Jan 18, 2019Observed: 444.09 ft at 8:30PM Jan 18, 2019Observed: 444.1 ft at 9:00PM Jan 18, 2019Observed: 444.05 ft at 9:30PM Jan 18, 2019Observed: 444.05 ft at 10:00PM Jan 18, 2019Observed: 444.02 ft at 10:30PM Jan 18, 2019Observed: 444.35 ft at 11:00PM Jan 18, 2019Observed: 444.04 ft at 11:30PM Jan 18, 2019Observed: 444.04 ft at 12:00AM Jan 19, 2019Observed: 443.96 ft at 12:30AM Jan 19, 2019Observed: 443.97 ft at 1:00AM Jan 19, 2019Observed: 443.98 ft at 1:30AM Jan 19, 2019Observed: 443.95 ft at 2:00AM Jan 19, 2019Observed: 443.96 ft at 2:30AM Jan 19, 2019Observed: 443.95 ft at 3:00AM Jan 19, 2019Observed: 443.97 ft at 3:30AM Jan 19, 2019Observed: 443.79 ft at 4:00AM Jan 19, 2019Observed: 443.76 ft at 4:30AM Jan 19, 2019Observed: 443.71 ft at 5:00AM Jan 19, 2019Observed: 443.69 ft at 5:30AM Jan 19, 2019Observed: 443.66 ft at 6:00AM Jan 19, 2019Observed: 443.62 ft at 6:30AM Jan 19, 2019Observed: 443.6 ft at 7:00AM Jan 19, 2019Observed: 443.54 ft at 7:30AM Jan 19, 2019Observed: 443.45 ft at 8:00AM Jan 19, 2019Observed: 443.43 ft at 8:30AM Jan 19, 2019Observed: 443.44 ft at 9:00AM Jan 19, 2019Observed: 443.42 ft at 9:30AM Jan 19, 2019Observed: 443.37 ft at 10:00AM Jan 19, 2019Observed: 443.33 ft at 10:30AM Jan 19, 2019Observed: 443.36 ft at 11:00AM Jan 19, 2019Observed: 443.36 ft at 11:30AM Jan 19, 2019Observed: 443.33 ft at 12:00PM Jan 19, 2019Observed: 443.32 ft at 12:30PM Jan 19, 2019Observed: 443.33 ft at 1:00PM Jan 19, 2019Observed: 443.26 ft at 1:30PM Jan 19, 2019Observed: 443.33 ft at 2:00PM Jan 19, 2019Observed: 443.29 ft at 2:30PM Jan 19, 2019Observed: 443.32 ft at 3:00PM Jan 19, 2019Observed: 443.24 ft at 3:30PM Jan 19, 2019Observed: 443.29 ft at 4:00PM Jan 19, 2019Observed: 443.27 ft at 4:30PM Jan 19, 2019Observed: 443.27 ft at 5:00PM Jan 19, 2019Observed: 443.28 ft at 5:30PM Jan 19, 2019Observed: 443.22 ft at 6:00PM Jan 19, 2019Observed: 443.33 ft at 6:30PM Jan 19, 2019Observed: 443.38 ft at 7:00PM Jan 19, 2019Observed: 443.4 ft at 7:30PM Jan 19, 2019Observed: 443.39 ft at 8:00PM Jan 19, 2019Observed: 443.39 ft at 8:30PM Jan 19, 2019Observed: 443.43 ft at 9:00PM Jan 19, 2019Observed: 443.42 ft at 9:30PM Jan 19, 2019Observed: 443.44 ft at 10:00PM Jan 19, 2019Observed: 443.3 ft at 10:30PM Jan 19, 2019Observed: 442.38 ft at 11:00PM Jan 19, 2019Observed: 441.3 ft at 11:30PM Jan 19, 2019Observed: 440.43 ft at 12:00AM Jan 20, 2019Observed: 439.83 ft at 12:30AM Jan 20, 2019Observed: 439.43 ft at 1:00AM Jan 20, 2019Observed: 439.14 ft at 1:30AM Jan 20, 2019Observed: 438.88 ft at 2:00AM Jan 20, 2019Highest Forecast: 443.4 ft 6:00AM Jan 20, 2019Forecast: 443.3 ft 12:00PM Jan 20, 2019Forecast: 443.2 ft 6:00PM Jan 20, 2019Forecast: 443.1 ft 12:00AM Jan 21, 2019Forecast: 443.1 ft 6:00AM Jan 21, 2019Forecast: 443 ft 12:00PM Jan 21, 2019Forecast: 443 ft 6:00PM Jan 21, 2019Forecast: 442.9 ft 12:00AM Jan 22, 2019Forecast: 442.9 ft 6:00AM Jan 22, 2019Forecast: 442.8 ft 12:00PM Jan 22, 2019Forecast: 442.8 ft 6:00PM Jan 22, 2019Forecast: 442.7 ft 12:00AM Jan 23, 2019Forecast: 442.7 ft 6:00AM Jan 23, 2019Forecast: 442.6 ft 12:00PM Jan 23, 2019Forecast: 442.6 ft 6:00PM Jan 23, 2019Forecast: 442.6 ft 12:00AM Jan 24, 2019Forecast: 442.6 ft 6:00AM Jan 24, 2019Forecast: 442.5 ft 12:00PM Jan 24, 2019Forecast: 442.5 ft 6:00PM Jan 24, 2019Forecast: 442.5 ft 12:00AM Jan 25, 2019Forecast: 442.5 ft 6:00AM Jan 25, 2019Forecast: 442.4 ft 12:00PM Jan 25, 2019Forecast: 442.4 ft 6:00PM Jan 25, 2019Forecast: 442.4 ft 12:00AM Jan 26, 2019Forecast: 442.3 ft 6:00AM Jan 26, 2019USACESRDI2(plotting HTIRG) Graph Created (2:53AM Jan 20, 2019)ObservedForecast (issued 10:37AM Jan 19)Latest observed value: 438.88 ft at 2:00 AM CST 20-Jan-2019.
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (CST)
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 48 hours into the future from the forecast issuance time.

NOTE: Forecasts for the Illinois River at Starved Rock Lock (tailwater) are issued routinely year-round.

Return to Area Map
Upstream Gauge - at Ottawa Upstream Gauge Downstream Gauge Downstream Gauge - near La Salle
Flood Categories (in feet)
Not Available

Historic Crests
(1) 467.31 ft on 09/16/2008
(2) 464.70 ft on 12/05/1982
(3) 464.60 ft on 02/22/1997
(4) 463.65 ft on 02/22/2018 (P)
(5) 463.56 ft on 03/05/1985
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 463.65 ft on 02/22/2018 (P)
(2) 453.33 ft on 10/16/2017 (P)
(3) 455.24 ft on 07/23/2017
(4) 459.51 ft on 05/02/2017
(5) 462.26 ft on 12/29/2008
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 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
459 Dee Bennet Road floods
Photos
(1) Starved Rock
(2) Gates at lock and dam September 2010.
(3) Looking upstream. September 2010.
About This Location Collapse

Latitude: 41.324722° N, Longitude: 88.983889° 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 450 ft  

Current/Historical Observations:
Additional Information Collapse
How much forecast precipitation was used for the current river forecast?
How low could the river get?
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
Ask Questions/Webmaster
Page last modified: 21-Dec-2016 5:20 PM 		Disclaimer
Credits
Glossary 		Privacy Policy
About Us
Career Opportunities