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Hydrograph River at a Glance Download Inundation
Mapping
Illinois River at Ottawa Stage (ft)Observed: 459.91 ft at 6:00PM Mar 16, 2023Observed: 459.92 ft at 6:15PM Mar 16, 2023Observed: 459.92 ft at 6:30PM Mar 16, 2023Observed: 459.92 ft at 6:45PM Mar 16, 2023Observed: 459.93 ft at 7:00PM Mar 16, 2023Observed: 459.95 ft at 7:15PM Mar 16, 2023Observed: 459.93 ft at 7:30PM Mar 16, 2023Observed: 459.93 ft at 7:45PM Mar 16, 2023Observed: 459.95 ft at 8:00PM Mar 16, 2023Observed: 460.02 ft at 8:15PM Mar 16, 2023Observed: 460.02 ft at 8:30PM Mar 16, 2023Observed: 460.03 ft at 8:45PM Mar 16, 2023Observed: 460.03 ft at 9:00PM Mar 16, 2023Observed: 460.03 ft at 9:15PM Mar 16, 2023Observed: 460.04 ft at 9:30PM Mar 16, 2023Observed: 460.04 ft at 9:45PM Mar 16, 2023Observed: 460.03 ft at 10:00PM Mar 16, 2023Observed: 460.04 ft at 10:15PM Mar 16, 2023Observed: 460.04 ft at 10:30PM Mar 16, 2023Observed: 460.03 ft at 10:45PM Mar 16, 2023Observed: 460.04 ft at 11:00PM Mar 16, 2023Observed: 460.04 ft at 11:15PM Mar 16, 2023Observed: 460.04 ft at 11:30PM Mar 16, 2023Observed: 460.03 ft at 11:45PM Mar 16, 2023Observed: 460.03 ft at 12:00AM Mar 17, 2023Observed: 460.1 ft at 12:15AM Mar 17, 2023Observed: 460.2 ft at 12:30AM Mar 17, 2023Observed: 460.23 ft at 12:45AM Mar 17, 2023Observed: 460.16 ft at 1:00AM Mar 17, 2023Observed: 460.18 ft at 1:15AM Mar 17, 2023Observed: 460.2 ft at 1:30AM Mar 17, 2023Observed: 460.18 ft at 1:45AM Mar 17, 2023Observed: 460.11 ft at 2:00AM Mar 17, 2023Observed: 460.13 ft at 2:15AM Mar 17, 2023Observed: 460.13 ft at 2:30AM Mar 17, 2023Observed: 460.07 ft at 2:45AM Mar 17, 2023Observed: 460.08 ft at 3:00AM Mar 17, 2023Observed: 460.07 ft at 3:15AM Mar 17, 2023Observed: 460.07 ft at 3:30AM Mar 17, 2023Observed: 460.06 ft at 3:45AM Mar 17, 2023Observed: 460.04 ft at 4:00AM Mar 17, 2023Observed: 460.04 ft at 4:15AM Mar 17, 2023Observed: 460.04 ft at 4:30AM Mar 17, 2023Observed: 460.05 ft at 4:45AM Mar 17, 2023Observed: 460.02 ft at 5:00AM Mar 17, 2023Observed: 460.03 ft at 5:15AM Mar 17, 2023Observed: 460.02 ft at 5:30AM Mar 17, 2023Observed: 460.03 ft at 5:45AM Mar 17, 2023Observed: 460.02 ft at 6:00AM Mar 17, 2023Observed: 460.03 ft at 6:15AM Mar 17, 2023Observed: 460.01 ft at 6:30AM Mar 17, 2023Observed: 460.01 ft at 6:45AM Mar 17, 2023Observed: 460.02 ft at 7:00AM Mar 17, 2023Observed: 460.01 ft at 7:15AM Mar 17, 2023Observed: 459.99 ft at 7:30AM Mar 17, 2023Observed: 459.99 ft at 7:45AM Mar 17, 2023Observed: 460.01 ft at 8:00AM Mar 17, 2023Observed: 459.99 ft at 8:15AM Mar 17, 2023Observed: 459.99 ft at 8:30AM Mar 17, 2023Observed: 459.99 ft at 8:45AM Mar 17, 2023Observed: 459.99 ft at 9:00AM Mar 17, 2023Observed: 459.99 ft at 9:15AM Mar 17, 2023Observed: 459.99 ft at 9:30AM Mar 17, 2023Observed: 459.99 ft at 9:45AM Mar 17, 2023Observed: 459.97 ft at 10:00AM Mar 17, 2023Observed: 459.94 ft at 10:15AM Mar 17, 2023Observed: 459.97 ft at 10:30AM Mar 17, 2023Observed: 460 ft at 10:45AM Mar 17, 2023Observed: 460.12 ft at 11:00AM Mar 17, 2023Observed: 460.1 ft at 11:15AM Mar 17, 2023Observed: 460.09 ft at 11:30AM Mar 17, 2023Observed: 460.1 ft at 11:45AM Mar 17, 2023Observed: 460.13 ft at 12:00PM Mar 17, 2023Observed: 460.15 ft at 12:15PM Mar 17, 2023Observed: 460.19 ft at 12:30PM Mar 17, 2023Observed: 460.2 ft at 12:45PM Mar 17, 2023Observed: 460.21 ft at 1:00PM Mar 17, 2023Observed: 460.21 ft at 1:15PM Mar 17, 2023Observed: 460.24 ft at 1:30PM Mar 17, 2023Observed: 460.3 ft at 1:45PM Mar 17, 2023Observed: 460.31 ft at 2:00PM Mar 17, 2023Observed: 460.32 ft at 2:15PM Mar 17, 2023Observed: 460.36 ft at 2:30PM Mar 17, 2023Observed: 460.39 ft at 2:45PM Mar 17, 2023Observed: 460.36 ft at 3:00PM Mar 17, 2023Observed: 460.36 ft at 3:15PM Mar 17, 2023Observed: 460.46 ft at 3:30PM Mar 17, 2023Observed: 460.38 ft at 3:45PM Mar 17, 2023Observed: 460.37 ft at 4:00PM Mar 17, 2023Observed: 460.38 ft at 4:15PM Mar 17, 2023Observed: 460.38 ft at 4:30PM Mar 17, 2023Observed: 460.37 ft at 4:45PM Mar 17, 2023Observed: 460.39 ft at 5:00PM Mar 17, 2023Observed: 460.38 ft at 5:15PM Mar 17, 2023Observed: 460.37 ft at 5:30PM Mar 17, 2023Observed: 460.36 ft at 5:45PM Mar 17, 2023Observed: 460.28 ft at 6:00PM Mar 17, 2023Observed: 460.32 ft at 6:15PM Mar 17, 2023Observed: 460.36 ft at 6:30PM Mar 17, 2023Observed: 460.34 ft at 6:45PM Mar 17, 2023Observed: 460.35 ft at 7:00PM Mar 17, 2023Observed: 460.35 ft at 7:15PM Mar 17, 2023Observed: 460.42 ft at 7:30PM Mar 17, 2023Observed: 460.4 ft at 7:45PM Mar 17, 2023Observed: 460.38 ft at 8:00PM Mar 17, 2023Observed: 460.32 ft at 8:15PM Mar 17, 2023Observed: 460.33 ft at 8:30PM Mar 17, 2023Observed: 460.33 ft at 8:45PM Mar 17, 2023Observed: 460.43 ft at 9:00PM Mar 17, 2023Observed: 460.33 ft at 9:15PM Mar 17, 2023Observed: 460.35 ft at 9:30PM Mar 17, 2023Observed: 460.38 ft at 9:45PM Mar 17, 2023Observed: 460.4 ft at 10:00PM Mar 17, 2023Observed: 460.38 ft at 10:15PM Mar 17, 2023Observed: 460.39 ft at 10:30PM Mar 17, 2023Observed: 460.39 ft at 10:45PM Mar 17, 2023Observed: 460.41 ft at 11:00PM Mar 17, 2023Observed: 460.41 ft at 11:15PM Mar 17, 2023Observed: 460.41 ft at 11:30PM Mar 17, 2023Observed: 460.53 ft at 11:45PM Mar 17, 2023Observed: 460.5 ft at 12:00AM Mar 18, 2023Observed: 460.44 ft at 12:15AM Mar 18, 2023Observed: 460.47 ft at 12:30AM Mar 18, 2023Observed: 460.48 ft at 12:45AM Mar 18, 2023Observed: 460.5 ft at 1:00AM Mar 18, 2023Observed: 460.53 ft at 1:15AM Mar 18, 2023Observed: 460.52 ft at 1:30AM Mar 18, 2023Observed: 460.52 ft at 1:45AM Mar 18, 2023Observed: 460.53 ft at 2:00AM Mar 18, 2023Observed: 460.54 ft at 2:15AM Mar 18, 2023Observed: 460.54 ft at 2:30AM Mar 18, 2023Observed: 460.56 ft at 2:45AM Mar 18, 2023Observed: 460.56 ft at 3:00AM Mar 18, 2023Observed: 460.57 ft at 3:15AM Mar 18, 2023Observed: 460.57 ft at 3:30AM Mar 18, 2023Observed: 460.57 ft at 3:45AM Mar 18, 2023Observed: 460.54 ft at 4:00AM Mar 18, 2023Observed: 460.54 ft at 4:15AM Mar 18, 2023Observed: 460.57 ft at 4:30AM Mar 18, 2023Highest Observation: 460.59 ft at 4:45AM Mar 18, 2023Observed: 460.56 ft at 5:00AM Mar 18, 2023Observed: 460.55 ft at 5:15AM Mar 18, 2023Observed: 460.56 ft at 5:30AM Mar 18, 2023Observed: 460.56 ft at 5:45AM Mar 18, 2023Observed: 460.55 ft at 6:00AM Mar 18, 2023Observed: 460.54 ft at 6:15AM Mar 18, 2023Observed: 460.52 ft at 6:30AM Mar 18, 2023Observed: 460.52 ft at 6:45AM Mar 18, 2023Observed: 460.49 ft at 7:00AM Mar 18, 2023Observed: 460.48 ft at 7:15AM Mar 18, 2023Observed: 460.49 ft at 7:30AM Mar 18, 2023Observed: 460.5 ft at 7:45AM Mar 18, 2023Observed: 460.51 ft at 8:00AM Mar 18, 2023Observed: 460.52 ft at 8:15AM Mar 18, 2023Observed: 460.52 ft at 8:30AM Mar 18, 2023Observed: 460.54 ft at 8:45AM Mar 18, 2023Observed: 460.54 ft at 9:00AM Mar 18, 2023Observed: 460.55 ft at 9:15AM Mar 18, 2023Observed: 460.55 ft at 9:30AM Mar 18, 2023Observed: 460.55 ft at 9:45AM Mar 18, 2023Observed: 460.52 ft at 10:00AM Mar 18, 2023Observed: 460.55 ft at 10:15AM Mar 18, 2023Observed: 460.53 ft at 10:30AM Mar 18, 2023Observed: 460.49 ft at 10:45AM Mar 18, 2023Observed: 460.46 ft at 11:00AM Mar 18, 2023Observed: 460.47 ft at 11:15AM Mar 18, 2023Observed: 460.45 ft at 11:30AM Mar 18, 2023Observed: 460.43 ft at 11:45AM Mar 18, 2023Observed: 460.4 ft at 12:00PM Mar 18, 2023Observed: 460.36 ft at 12:15PM Mar 18, 2023Observed: 460.36 ft at 12:30PM Mar 18, 2023Observed: 460.38 ft at 12:45PM Mar 18, 2023Observed: 460.38 ft at 1:00PM Mar 18, 2023Observed: 460.41 ft at 1:15PM Mar 18, 2023Observed: 460.49 ft at 1:30PM Mar 18, 2023Observed: 460.47 ft at 1:45PM Mar 18, 2023Observed: 460.46 ft at 2:00PM Mar 18, 2023Observed: 460.45 ft at 2:15PM Mar 18, 2023Observed: 460.44 ft at 2:30PM Mar 18, 2023Observed: 460.43 ft at 2:45PM Mar 18, 2023Observed: 460.42 ft at 3:00PM Mar 18, 2023Observed: 460.4 ft at 3:15PM Mar 18, 2023Observed: 460.4 ft at 3:30PM Mar 18, 2023Observed: 460.41 ft at 3:45PM Mar 18, 2023Observed: 460.4 ft at 4:00PM Mar 18, 2023Observed: 460.4 ft at 4:15PM Mar 18, 2023Observed: 460.39 ft at 4:30PM Mar 18, 2023Observed: 460.39 ft at 4:45PM Mar 18, 2023Observed: 460.32 ft at 5:00PM Mar 18, 2023Observed: 460.37 ft at 5:15PM Mar 18, 2023Observed: 460.35 ft at 5:30PM Mar 18, 2023Observed: 460.35 ft at 5:45PM Mar 18, 2023Observed: 460.34 ft at 6:00PM Mar 18, 2023Observed: 460.23 ft at 6:15PM Mar 18, 2023Observed: 460.32 ft at 6:30PM Mar 18, 2023Observed: 460.31 ft at 6:45PM Mar 18, 2023Observed: 460.3 ft at 7:00PM Mar 18, 2023Observed: 460.3 ft at 7:15PM Mar 18, 2023Observed: 460.32 ft at 7:30PM Mar 18, 2023Observed: 460.32 ft at 7:45PM Mar 18, 2023Observed: 460.32 ft at 8:00PM Mar 18, 2023Observed: 460.25 ft at 8:15PM Mar 18, 2023Observed: 460.26 ft at 8:30PM Mar 18, 2023Observed: 460.25 ft at 8:45PM Mar 18, 2023Observed: 460.23 ft at 9:00PM Mar 18, 2023Observed: 460.29 ft at 9:15PM Mar 18, 2023Observed: 460.23 ft at 9:30PM Mar 18, 2023Observed: 460.24 ft at 9:45PM Mar 18, 2023Observed: 460.22 ft at 10:00PM Mar 18, 2023Observed: 460.21 ft at 10:15PM Mar 18, 2023Observed: 460.21 ft at 10:30PM Mar 18, 2023Observed: 460.22 ft at 10:45PM Mar 18, 2023Observed: 460.22 ft at 11:00PM Mar 18, 2023Observed: 460.22 ft at 11:15PM Mar 18, 2023Observed: 460.2 ft at 11:30PM Mar 18, 2023Observed: 460.21 ft at 11:45PM Mar 18, 2023Observed: 460.21 ft at 12:00AM Mar 19, 2023Observed: 460.2 ft at 12:15AM Mar 19, 2023Observed: 460.21 ft at 12:30AM Mar 19, 2023Observed: 460.24 ft at 12:45AM Mar 19, 2023Observed: 460.24 ft at 1:00AM Mar 19, 2023Observed: 460.26 ft at 1:15AM Mar 19, 2023Observed: 460.25 ft at 1:30AM Mar 19, 2023Observed: 460.22 ft at 1:45AM Mar 19, 2023Observed: 460.22 ft at 2:00AM Mar 19, 2023Observed: 460.32 ft at 2:15AM Mar 19, 2023Observed: 460.22 ft at 2:30AM Mar 19, 2023Observed: 460.23 ft at 2:45AM Mar 19, 2023Observed: 460.21 ft at 3:00AM Mar 19, 2023Observed: 460.23 ft at 3:15AM Mar 19, 2023Observed: 460.19 ft at 3:30AM Mar 19, 2023Observed: 460.17 ft at 3:45AM Mar 19, 2023Observed: 460.18 ft at 4:00AM Mar 19, 2023Observed: 460.18 ft at 4:15AM Mar 19, 2023Observed: 460.15 ft at 4:30AM Mar 19, 2023Observed: 460.14 ft at 4:45AM Mar 19, 2023Observed: 460.14 ft at 5:00AM Mar 19, 2023Observed: 460.12 ft at 5:15AM Mar 19, 2023Observed: 460.1 ft at 5:30AM Mar 19, 2023Observed: 460.08 ft at 5:45AM Mar 19, 2023Observed: 460.07 ft at 6:00AM Mar 19, 2023Observed: 460.06 ft at 6:15AM Mar 19, 2023Observed: 460.06 ft at 6:30AM Mar 19, 2023Observed: 460.03 ft at 6:45AM Mar 19, 2023Observed: 460 ft at 7:00AM Mar 19, 2023Observed: 460 ft at 7:15AM Mar 19, 2023Observed: 460.02 ft at 7:30AM Mar 19, 2023Observed: 460 ft at 7:45AM Mar 19, 2023Observed: 459.97 ft at 8:00AM Mar 19, 2023Observed: 459.96 ft at 8:15AM Mar 19, 2023Observed: 459.95 ft at 8:30AM Mar 19, 2023Observed: 459.94 ft at 8:45AM Mar 19, 2023Observed: 459.93 ft at 9:00AM Mar 19, 2023Observed: 459.92 ft at 9:15AM Mar 19, 2023Observed: 459.9 ft at 9:30AM Mar 19, 2023Observed: 459.9 ft at 9:45AM Mar 19, 2023Observed: 459.92 ft at 10:00AM Mar 19, 2023Observed: 459.92 ft at 10:15AM Mar 19, 2023Observed: 459.94 ft at 10:30AM Mar 19, 2023Observed: 459.96 ft at 10:45AM Mar 19, 2023Observed: 459.96 ft at 11:00AM Mar 19, 2023Observed: 459.96 ft at 11:15AM Mar 19, 2023Observed: 459.98 ft at 11:30AM Mar 19, 2023Observed: 459.98 ft at 11:45AM Mar 19, 2023Observed: 459.98 ft at 12:00PM Mar 19, 2023Observed: 459.99 ft at 12:15PM Mar 19, 2023Observed: 460 ft at 12:30PM Mar 19, 2023Observed: 460 ft at 12:45PM Mar 19, 2023Observed: 459.99 ft at 1:00PM Mar 19, 2023Observed: 459.98 ft at 1:15PM Mar 19, 2023Observed: 459.98 ft at 1:30PM Mar 19, 2023Observed: 460 ft at 1:45PM Mar 19, 2023Observed: 460.01 ft at 2:00PM Mar 19, 2023Observed: 460.04 ft at 2:15PM Mar 19, 2023Observed: 460.04 ft at 2:30PM Mar 19, 2023Observed: 460.04 ft at 2:45PM Mar 19, 2023Observed: 460.03 ft at 3:00PM Mar 19, 2023Observed: 460.03 ft at 3:15PM Mar 19, 2023Observed: 460.01 ft at 3:30PM Mar 19, 2023Observed: 460.01 ft at 3:45PM Mar 19, 2023Observed: 459.98 ft at 4:00PM Mar 19, 2023Observed: 459.97 ft at 4:15PM Mar 19, 2023Observed: 459.96 ft at 4:30PM Mar 19, 2023Observed: 459.89 ft at 4:45PM Mar 19, 2023Observed: 459.92 ft at 5:00PM Mar 19, 2023Observed: 459.93 ft at 5:15PM Mar 19, 2023Observed: 459.93 ft at 5:30PM Mar 19, 2023Observed: 459.93 ft at 5:45PM Mar 19, 2023Observed: 459.91 ft at 6:00PM Mar 19, 2023Observed: 459.9 ft at 6:15PM Mar 19, 2023Observed: 459.9 ft at 6:30PM Mar 19, 2023Observed: 459.89 ft at 6:45PM Mar 19, 2023Observed: 459.88 ft at 7:00PM Mar 19, 2023Observed: 459.88 ft at 7:15PM Mar 19, 2023Observed: 459.86 ft at 7:30PM Mar 19, 2023Observed: 459.94 ft at 7:45PM Mar 19, 2023Observed: 459.94 ft at 8:00PM Mar 19, 2023Observed: 459.95 ft at 8:15PM Mar 19, 2023Observed: 459.94 ft at 8:30PM Mar 19, 2023Observed: 459.96 ft at 8:45PM Mar 19, 2023Observed: 459.98 ft at 9:00PM Mar 19, 2023Observed: 460 ft at 9:15PM Mar 19, 2023Observed: 459.99 ft at 9:30PM Mar 19, 2023Observed: 459.98 ft at 9:45PM Mar 19, 2023Observed: 459.96 ft at 10:00PM Mar 19, 2023Observed: 460.03 ft at 10:15PM Mar 19, 2023Observed: 459.95 ft at 10:30PM Mar 19, 2023Observed: 459.95 ft at 10:45PM Mar 19, 2023Observed: 459.95 ft at 11:00PM Mar 19, 2023Observed: 459.96 ft at 11:15PM Mar 19, 2023Observed: 459.97 ft at 11:30PM Mar 19, 2023Observed: 459.96 ft at 11:45PM Mar 19, 2023Observed: 459.97 ft at 12:00AM Mar 20, 2023Observed: 459.96 ft at 12:15AM Mar 20, 2023Observed: 459.9 ft at 12:30AM Mar 20, 2023Observed: 459.92 ft at 12:45AM Mar 20, 2023Observed: 459.96 ft at 1:00AM Mar 20, 2023Observed: 459.97 ft at 1:15AM Mar 20, 2023Observed: 459.96 ft at 1:30AM Mar 20, 2023Observed: 459.95 ft at 1:45AM Mar 20, 2023Observed: 459.94 ft at 2:00AM Mar 20, 2023Observed: 459.92 ft at 2:15AM Mar 20, 2023Observed: 459.92 ft at 2:30AM Mar 20, 2023Observed: 459.92 ft at 2:45AM Mar 20, 2023Observed: 459.91 ft at 3:00AM Mar 20, 2023Observed: 459.91 ft at 3:15AM Mar 20, 2023Observed: 459.91 ft at 3:30AM Mar 20, 2023Observed: 459.9 ft at 3:45AM Mar 20, 2023Observed: 459.88 ft at 4:00AM Mar 20, 2023Observed: 459.88 ft at 4:15AM Mar 20, 2023Observed: 459.9 ft at 4:30AM Mar 20, 2023Observed: 459.88 ft at 4:45AM Mar 20, 2023Observed: 459.89 ft at 5:00AM Mar 20, 2023Observed: 459.92 ft at 5:15AM Mar 20, 2023Observed: 459.95 ft at 5:30AM Mar 20, 2023Observed: 460.02 ft at 5:45AM Mar 20, 2023Observed: 459.95 ft at 6:00AM Mar 20, 2023Observed: 459.97 ft at 6:15AM Mar 20, 2023Observed: 459.96 ft at 6:30AM Mar 20, 2023Observed: 459.95 ft at 6:45AM Mar 20, 2023Observed: 459.95 ft at 7:00AM Mar 20, 2023Observed: 459.94 ft at 7:15AM Mar 20, 2023Observed: 459.92 ft at 7:30AM Mar 20, 2023Observed: 459.91 ft at 7:45AM Mar 20, 2023Observed: 459.91 ft at 8:00AM Mar 20, 2023Observed: 459.9 ft at 8:15AM Mar 20, 2023Observed: 459.91 ft at 8:30AM Mar 20, 2023Observed: 459.89 ft at 8:45AM Mar 20, 2023Observed: 459.89 ft at 9:00AM Mar 20, 2023Observed: 459.89 ft at 9:15AM Mar 20, 2023Observed: 459.89 ft at 9:30AM Mar 20, 2023Observed: 459.89 ft at 9:45AM Mar 20, 2023Observed: 459.88 ft at 10:00AM Mar 20, 2023Observed: 459.92 ft at 10:15AM Mar 20, 2023Observed: 459.91 ft at 10:30AM Mar 20, 2023Observed: 459.87 ft at 10:45AM Mar 20, 2023Observed: 459.87 ft at 11:00AM Mar 20, 2023Observed: 459.87 ft at 11:15AM Mar 20, 2023Observed: 459.88 ft at 11:30AM Mar 20, 2023Observed: 459.88 ft at 11:45AM Mar 20, 2023Observed: 459.86 ft at 12:00PM Mar 20, 2023Observed: 459.85 ft at 12:15PM Mar 20, 2023Observed: 459.84 ft at 12:30PM Mar 20, 2023Observed: 459.81 ft at 12:45PM Mar 20, 2023Observed: 459.84 ft at 1:00PM Mar 20, 2023Observed: 459.83 ft at 1:15PM Mar 20, 2023Observed: 459.81 ft at 1:30PM Mar 20, 2023Observed: 459.78 ft at 1:45PM Mar 20, 2023Observed: 459.79 ft at 2:00PM Mar 20, 2023Observed: 459.79 ft at 2:15PM Mar 20, 2023Observed: 459.79 ft at 2:30PM Mar 20, 2023Observed: 459.76 ft at 2:45PM Mar 20, 2023Observed: 459.74 ft at 3:00PM Mar 20, 2023Observed: 459.74 ft at 3:15PM Mar 20, 2023Observed: 459.74 ft at 3:30PM Mar 20, 2023Observed: 459.73 ft at 3:45PM Mar 20, 2023Observed: 459.74 ft at 4:00PM Mar 20, 2023Observed: 459.66 ft at 4:15PM Mar 20, 2023Observed: 459.77 ft at 4:30PM Mar 20, 2023Observed: 459.71 ft at 4:45PM Mar 20, 2023Observed: 459.74 ft at 5:00PM Mar 20, 2023Observed: 459.72 ft at 5:15PM Mar 20, 2023Observed: 459.74 ft at 5:30PM Mar 20, 2023Observed: 459.74 ft at 5:45PM Mar 20, 2023Observed: 459.76 ft at 6:00PM Mar 20, 2023Observed: 459.76 ft at 6:15PM Mar 20, 2023Observed: 459.76 ft at 6:30PM Mar 20, 2023Observed: 459.76 ft at 6:45PM Mar 20, 2023Observed: 459.79 ft at 7:00PM Mar 20, 2023Observed: 459.8 ft at 7:15PM Mar 20, 2023Observed: 459.81 ft at 7:30PM Mar 20, 2023Observed: 459.81 ft at 7:45PM Mar 20, 2023Observed: 459.83 ft at 8:00PM Mar 20, 2023Observed: 459.82 ft at 8:15PM Mar 20, 2023Observed: 459.83 ft at 8:30PM Mar 20, 2023Observed: 459.84 ft at 8:45PM Mar 20, 2023Observed: 459.87 ft at 9:00PM Mar 20, 2023Observed: 459.89 ft at 9:15PM Mar 20, 2023Observed: 459.88 ft at 9:30PM Mar 20, 2023Observed: 459.88 ft at 9:45PM Mar 20, 2023Observed: 459.91 ft at 10:00PM Mar 20, 2023Observed: 459.89 ft at 10:15PM Mar 20, 2023Observed: 459.92 ft at 10:30PM Mar 20, 2023Observed: 460 ft at 10:45PM Mar 20, 2023Observed: 460 ft at 11:00PM Mar 20, 2023Observed: 459.99 ft at 11:15PM Mar 20, 2023Observed: 460 ft at 11:30PM Mar 20, 2023Observed: 460.01 ft at 11:45PM Mar 20, 2023Observed: 460.01 ft at 12:00AM Mar 21, 2023Observed: 459.99 ft at 12:15AM Mar 21, 2023Observed: 460.06 ft at 12:30AM Mar 21, 2023Observed: 460.06 ft at 12:45AM Mar 21, 2023Observed: 460.03 ft at 1:00AM Mar 21, 2023Observed: 460.03 ft at 1:15AM Mar 21, 2023Observed: 460.04 ft at 1:30AM Mar 21, 2023Observed: 460.05 ft at 1:45AM Mar 21, 2023Observed: 460.05 ft at 2:00AM Mar 21, 2023Observed: 460.08 ft at 2:15AM Mar 21, 2023Observed: 460.09 ft at 2:30AM Mar 21, 2023Observed: 460.08 ft at 2:45AM Mar 21, 2023Observed: 460.07 ft at 3:00AM Mar 21, 2023Observed: 460.13 ft at 3:15AM Mar 21, 2023Observed: 460.06 ft at 3:30AM Mar 21, 2023Observed: 460.06 ft at 3:45AM Mar 21, 2023Observed: 460.05 ft at 4:00AM Mar 21, 2023Observed: 460.03 ft at 4:15AM Mar 21, 2023Observed: 460.03 ft at 4:30AM Mar 21, 2023Observed: 460 ft at 4:45AM Mar 21, 2023Observed: 459.98 ft at 5:00AM Mar 21, 2023Observed: 459.95 ft at 5:15AM Mar 21, 2023Observed: 459.94 ft at 5:30AM Mar 21, 2023Observed: 459.93 ft at 5:45AM Mar 21, 2023Observed: 459.88 ft at 6:00AM Mar 21, 2023Observed: 459.88 ft at 6:15AM Mar 21, 2023Observed: 459.86 ft at 6:30AM Mar 21, 2023Observed: 459.83 ft at 6:45AM Mar 21, 2023Observed: 459.81 ft at 7:00AM Mar 21, 2023Observed: 459.8 ft at 7:15AM Mar 21, 2023Observed: 459.78 ft at 7:30AM Mar 21, 2023Observed: 459.77 ft at 7:45AM Mar 21, 2023Observed: 459.74 ft at 8:00AM Mar 21, 2023Observed: 459.74 ft at 8:15AM Mar 21, 2023Observed: 459.73 ft at 8:30AM Mar 21, 2023Observed: 459.73 ft at 8:45AM Mar 21, 2023Observed: 459.72 ft at 9:00AM Mar 21, 2023Observed: 459.71 ft at 9:15AM Mar 21, 2023Observed: 459.7 ft at 9:30AM Mar 21, 2023Observed: 459.66 ft at 3:45PM Mar 21, 2023Observed: 459.67 ft at 4:00PM Mar 21, 2023Observed: 459.73 ft at 4:15PM Mar 21, 2023Observed: 459.65 ft at 4:30PM Mar 21, 2023Observed: 459.65 ft at 4:45PM Mar 21, 2023Observed: 459.67 ft at 5:00PM Mar 21, 2023Observed: 459.66 ft at 5:15PM Mar 21, 2023Observed: 459.66 ft at 5:30PM Mar 21, 2023Observed: 459.65 ft at 5:45PM Mar 21, 2023Observed: 459.65 ft at 6:00PM Mar 21, 2023Observed: 459.65 ft at 6:15PM Mar 21, 2023Observed: 459.67 ft at 6:30PM Mar 21, 2023Observed: 459.69 ft at 6:45PM Mar 21, 2023Observed: 459.67 ft at 7:00PM Mar 21, 2023Observed: 459.69 ft at 7:15PM Mar 21, 2023Observed: 459.71 ft at 7:30PM Mar 21, 2023Observed: 459.72 ft at 7:45PM Mar 21, 2023Observed: 459.72 ft at 8:00PM Mar 21, 2023Observed: 459.72 ft at 8:15PM Mar 21, 2023Observed: 459.71 ft at 8:30PM Mar 21, 2023Observed: 459.71 ft at 8:45PM Mar 21, 2023Observed: 459.71 ft at 9:00PM Mar 21, 2023Observed: 459.71 ft at 9:15PM Mar 21, 2023Observed: 459.73 ft at 9:30PM Mar 21, 2023Observed: 459.74 ft at 9:45PM Mar 21, 2023Observed: 459.75 ft at 10:00PM Mar 21, 2023Observed: 459.76 ft at 10:15PM Mar 21, 2023Observed: 459.77 ft at 10:30PM Mar 21, 2023Observed: 459.79 ft at 10:45PM Mar 21, 2023Observed: 459.8 ft at 11:00PM Mar 21, 2023Observed: 459.81 ft at 11:15PM Mar 21, 2023Observed: 459.83 ft at 11:30PM Mar 21, 2023Observed: 459.84 ft at 11:45PM Mar 21, 2023Observed: 459.85 ft at 12:00AM Mar 22, 2023Observed: 459.86 ft at 12:15AM Mar 22, 2023Observed: 459.87 ft at 12:30AM Mar 22, 2023Observed: 459.89 ft at 12:45AM Mar 22, 2023Observed: 459.91 ft at 1:00AM Mar 22, 2023Observed: 460.02 ft at 1:15AM Mar 22, 2023Observed: 459.85 ft at 1:30AM Mar 22, 2023Observed: 460.01 ft at 1:45AM Mar 22, 2023Observed: 460.03 ft at 2:00AM Mar 22, 2023Observed: 460.03 ft at 2:15AM Mar 22, 2023Observed: 460.03 ft at 2:30AM Mar 22, 2023Observed: 460.05 ft at 2:45AM Mar 22, 2023Observed: 460.08 ft at 3:00AM Mar 22, 2023Observed: 460.09 ft at 3:15AM Mar 22, 2023Observed: 460.08 ft at 3:30AM Mar 22, 2023Observed: 460.09 ft at 3:45AM Mar 22, 2023Observed: 460.1 ft at 4:00AM Mar 22, 2023Observed: 460.11 ft at 4:15AM Mar 22, 2023Observed: 460.21 ft at 4:30AM Mar 22, 2023Observed: 460.14 ft at 4:45AM Mar 22, 2023Observed: 460.15 ft at 5:00AM Mar 22, 2023Observed: 460.16 ft at 5:15AM Mar 22, 2023Observed: 460.15 ft at 5:30AM Mar 22, 2023Observed: 460.16 ft at 5:45AM Mar 22, 2023Observed: 460.14 ft at 6:00AM Mar 22, 2023Observed: 460.1 ft at 6:15AM Mar 22, 2023Observed: 460.07 ft at 6:30AM Mar 22, 2023Observed: 460.04 ft at 6:45AM Mar 22, 2023Observed: 460 ft at 7:00AM Mar 22, 2023Observed: 459.99 ft at 7:15AM Mar 22, 2023Observed: 459.99 ft at 7:30AM Mar 22, 2023Observed: 460.01 ft at 7:45AM Mar 22, 2023Observed: 460 ft at 8:00AM Mar 22, 2023Observed: 459.97 ft at 8:15AM Mar 22, 2023Observed: 459.96 ft at 8:30AM Mar 22, 2023Observed: 459.95 ft at 8:45AM Mar 22, 2023Observed: 459.94 ft at 9:00AM Mar 22, 2023Observed: 459.93 ft at 9:15AM Mar 22, 2023Observed: 459.95 ft at 9:30AM Mar 22, 2023Observed: 459.95 ft at 9:45AM Mar 22, 2023Observed: 459.93 ft at 10:00AM Mar 22, 2023Observed: 459.92 ft at 10:15AM Mar 22, 2023Observed: 459.93 ft at 10:30AM Mar 22, 2023Observed: 459.91 ft at 10:45AM Mar 22, 2023Observed: 459.88 ft at 11:00AM Mar 22, 2023Observed: 459.85 ft at 11:15AM Mar 22, 2023Observed: 459.83 ft at 11:30AM Mar 22, 2023Observed: 459.82 ft at 11:45AM Mar 22, 2023Observed: 459.65 ft at 12:00PM Mar 22, 2023Observed: 459.62 ft at 12:15PM Mar 22, 2023Observed: 459.58 ft at 12:30PM Mar 22, 2023Observed: 459.61 ft at 12:45PM Mar 22, 2023Observed: 459.59 ft at 1:00PM Mar 22, 2023Observed: 459.56 ft at 1:15PM Mar 22, 2023Observed: 459.53 ft at 1:30PM Mar 22, 2023Observed: 459.54 ft at 1:45PM Mar 22, 2023Observed: 459.56 ft at 2:00PM Mar 22, 2023Observed: 459.52 ft at 2:15PM Mar 22, 2023Observed: 459.52 ft at 2:30PM Mar 22, 2023Observed: 459.46 ft at 2:45PM Mar 22, 2023Observed: 459.46 ft at 3:00PM Mar 22, 2023Observed: 459.48 ft at 3:15PM Mar 22, 2023Observed: 459.48 ft at 3:30PM Mar 22, 2023Observed: 459.31 ft at 3:45PM Mar 22, 2023Observed: 459.44 ft at 4:00PM Mar 22, 2023Observed: 459.43 ft at 4:15PM Mar 22, 2023Observed: 459.45 ft at 4:30PM Mar 22, 2023Observed: 459.45 ft at 4:45PM Mar 22, 2023Observed: 459.52 ft at 5:00PM Mar 22, 2023Observed: 459.54 ft at 5:15PM Mar 22, 2023Observed: 459.54 ft at 5:30PM Mar 22, 2023Observed: 459.52 ft at 5:45PM Mar 22, 2023Observed: 459.3 ft at 6:00PM Mar 22, 2023Observed: 459.57 ft at 6:15PM Mar 22, 2023Observed: 459.56 ft at 6:30PM Mar 22, 2023Observed: 459.58 ft at 6:45PM Mar 22, 2023Observed: 459.6 ft at 7:00PM Mar 22, 2023Observed: 459.58 ft at 7:15PM Mar 22, 2023Observed: 459.67 ft at 7:30PM Mar 22, 2023Observed: 459.65 ft at 7:45PM Mar 22, 2023Observed: 459.63 ft at 8:00PM Mar 22, 2023Observed: 459.64 ft at 8:15PM Mar 22, 2023Observed: 459.65 ft at 8:30PM Mar 22, 2023Observed: 459.65 ft at 8:45PM Mar 22, 2023Observed: 459.78 ft at 9:00PM Mar 22, 2023Observed: 459.79 ft at 9:15PM Mar 22, 2023Observed: 459.81 ft at 9:30PM Mar 22, 2023Observed: 459.84 ft at 9:45PM Mar 22, 2023Observed: 459.87 ft at 10:00PM Mar 22, 2023Observed: 460 ft at 10:15PM Mar 22, 2023Observed: 459.98 ft at 10:30PM Mar 22, 2023Observed: 459.97 ft at 10:45PM Mar 22, 2023Observed: 459.98 ft at 11:00PM Mar 22, 2023Observed: 459.99 ft at 11:15PM Mar 22, 2023Observed: 460 ft at 11:30PM Mar 22, 2023Observed: 460 ft at 11:45PM Mar 22, 2023Observed: 460.01 ft at 12:00AM Mar 23, 2023Observed: 460.01 ft at 12:15AM Mar 23, 2023Observed: 460.01 ft at 12:30AM Mar 23, 2023Observed: 460.02 ft at 12:45AM Mar 23, 2023Observed: 460.02 ft at 1:00AM Mar 23, 2023Observed: 460 ft at 1:15AM Mar 23, 2023Observed: 459.99 ft at 1:30AM Mar 23, 2023Observed: 460 ft at 1:45AM Mar 23, 2023Observed: 459.99 ft at 2:00AM Mar 23, 2023Observed: 460 ft at 2:15AM Mar 23, 2023Observed: 460 ft at 2:30AM Mar 23, 2023Observed: 459.99 ft at 2:45AM Mar 23, 2023Observed: 459.98 ft at 3:00AM Mar 23, 2023Observed: 459.97 ft at 3:15AM Mar 23, 2023Observed: 459.96 ft at 3:30AM Mar 23, 2023Observed: 459.96 ft at 3:45AM Mar 23, 2023Observed: 459.99 ft at 4:00AM Mar 23, 2023Observed: 459.98 ft at 4:15AM Mar 23, 2023Observed: 459.96 ft at 4:30AM Mar 23, 2023Observed: 459.94 ft at 4:45AM Mar 23, 2023Observed: 459.93 ft at 5:00AM Mar 23, 2023Observed: 459.91 ft at 5:15AM Mar 23, 2023Observed: 459.89 ft at 5:30AM Mar 23, 2023Observed: 459.9 ft at 5:45AM Mar 23, 2023Observed: 459.9 ft at 6:00AM Mar 23, 2023Observed: 459.91 ft at 6:15AM Mar 23, 2023Observed: 459.9 ft at 6:30AM Mar 23, 2023Observed: 459.89 ft at 6:45AM Mar 23, 2023Observed: 459.88 ft at 7:00AM Mar 23, 2023Observed: 459.9 ft at 7:15AM Mar 23, 2023Observed: 459.91 ft at 7:30AM Mar 23, 2023Observed: 459.93 ft at 7:45AM Mar 23, 2023Observed: 459.94 ft at 8:00AM Mar 23, 2023Observed: 459.95 ft at 8:15AM Mar 23, 2023Observed: 459.95 ft at 8:30AM Mar 23, 2023Observed: 459.95 ft at 8:45AM Mar 23, 2023Observed: 459.95 ft at 9:00AM Mar 23, 2023Observed: 459.94 ft at 9:15AM Mar 23, 2023Observed: 459.95 ft at 9:30AM Mar 23, 2023Observed: 460.03 ft at 9:45AM Mar 23, 2023Observed: 460.04 ft at 10:00AM Mar 23, 2023Observed: 460.04 ft at 10:15AM Mar 23, 2023Observed: 460.06 ft at 10:30AM Mar 23, 2023Observed: 460.08 ft at 10:45AM Mar 23, 2023Observed: 460.08 ft at 11:00AM Mar 23, 2023Observed: 460.07 ft at 11:15AM Mar 23, 2023Observed: 460.07 ft at 11:30AM Mar 23, 2023Observed: 460.06 ft at 11:45AM Mar 23, 2023Observed: 460.04 ft at 12:00PM Mar 23, 2023Observed: 460.04 ft at 12:15PM Mar 23, 2023Observed: 460.03 ft at 12:30PM Mar 23, 2023Observed: 460.02 ft at 12:45PM Mar 23, 2023Observed: 460.01 ft at 1:00PM Mar 23, 2023Observed: 460 ft at 1:15PM Mar 23, 2023Observed: 459.99 ft at 1:30PM Mar 23, 2023Observed: 459.98 ft at 1:45PM Mar 23, 2023Observed: 459.97 ft at 2:00PM Mar 23, 2023Observed: 459.97 ft at 2:15PM Mar 23, 2023Observed: 459.98 ft at 2:30PM Mar 23, 2023Observed: 459.98 ft at 2:45PM Mar 23, 2023Observed: 459.97 ft at 3:00PM Mar 23, 2023Observed: 459.98 ft at 3:15PM Mar 23, 2023Observed: 459.98 ft at 3:30PM Mar 23, 2023Observed: 460.04 ft at 3:45PM Mar 23, 2023Observed: 460.03 ft at 4:00PM Mar 23, 2023Observed: 460.01 ft at 4:15PM Mar 23, 2023Observed: 460 ft at 4:30PM Mar 23, 2023Forecast: 460 ft 7:00PM Mar 23, 2023Forecast: 460 ft 1:00AM Mar 24, 2023Forecast: 460.1 ft 7:00AM Mar 24, 2023Forecast: 460.1 ft 1:00PM Mar 24, 2023Forecast: 460.2 ft 7:00PM Mar 24, 2023Forecast: 460.3 ft 1:00AM Mar 25, 2023Forecast: 460.4 ft 7:00AM Mar 25, 2023Forecast: 460.6 ft 1:00PM Mar 25, 2023Forecast: 460.8 ft 7:00PM Mar 25, 2023Forecast: 461.2 ft 1:00AM Mar 26, 2023Forecast: 461.5 ft 7:00AM Mar 26, 2023Forecast: 461.7 ft 1:00PM Mar 26, 2023Forecast: 461.9 ft 7:00PM Mar 26, 2023Highest Forecast: 462 ft 1:00AM Mar 27, 2023Forecast: 461.9 ft 7:00AM Mar 27, 2023Forecast: 461.8 ft 1:00PM Mar 27, 2023Forecast: 461.6 ft 7:00PM Mar 27, 2023Forecast: 461.5 ft 1:00AM Mar 28, 2023Forecast: 461.3 ft 7:00AM Mar 28, 2023Forecast: 461.1 ft 1:00PM Mar 28, 2023Forecast: 461 ft 7:00PM Mar 28, 2023Forecast: 460.9 ft 1:00AM Mar 29, 2023Forecast: 460.8 ft 7:00AM Mar 29, 2023Forecast: 460.7 ft 1:00PM Mar 29, 2023Forecast: 460.5 ft 7:00PM Mar 29, 2023Forecast: 460.5 ft 1:00AM Mar 30, 2023Forecast: 460.4 ft 7:00AM Mar 30, 2023US Army Corps of EngineersOTWI2(plotting HGIRG) Graph Created (5:55PM Mar 23, 2023)ObservedForecast (issued 11:21AM Mar 23)Latest observed value: 460 ft at 4:30 PM CDT 23-Mar-2023. Flood Stage is 463 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: NGVD29
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 Ottawa are issued as needed during times of high water, but are not routinely available.

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Upstream Gauge - at Marseilles Lock (tailwater) Upstream Gauge Downstream Gauge Downstream Gauge - at Starved Rock Lock (tailwater)
Flood Categories (in feet)
Major Flood Stage: 471
Moderate Flood Stage: 467
Flood Stage: 463
Action Stage: 461
Low Stage (in feet): 456.5

Historic Crests
(1) 473.72 ft on 04/19/2013
(2) 472.59 ft on 05/19/2020
(3) 472.21 ft on 09/16/2008
(4) 471.49 ft on 02/22/2018
(5) 470.83 ft on 05/02/2019
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 472.59 ft on 05/19/2020
(2) 470.83 ft on 05/02/2019
(3) 471.49 ft on 02/22/2018
(4) 463.65 ft on 10/16/2017
(5) 464.10 ft on 07/23/2017
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 458.62 ft on 11/26/2018
(2) 458.65 ft on 01/22/2019
(3) 458.82 ft on 09/03/2017

For more information on your flood risk go to www.floodsmart.gov.
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
476 Water reaches the top of the levee at Ottawa High School.
475.5 Backwater causes the Fox River to reach the top of the flood protection wall south of Main Street near Ottawa High School. Water inundates lower-level of residences at Heritage Harbor east of Ottawa.
474.5 Backwater causes the Fox River to reach the top of the levee at Ottawa High School.
474 Structures threatened at Shoreline Boat Club in Ottawa. Main Street at Fox River in Ottawa is threatened and may be closed, blocking the last primary evacuation route for east Ottawa. Water overtops the berm at Waste Water Treatment Plant.
472 West parking lot of St. Elizabeth Medical Center in Ottawa is inundated.
471.5 Water reaches top of levee at Ottawa Waste Water Treatment Plant. Backwater causes the Fox River to inundate the YMCA parking lot in Ottawa.
470 Shabbona Street near Ottawa High School is inundated. St. Elizabeth Medical Center property in Ottawa is threatened including the loading dock areas.
469 Backwater causes the Fox River to reach bankfull near the YMCA in Ottawa.
468 River Rescue structure threatened in Ottawa.
467 Green Street near Shoreline Boat Club in Ottawa is inundated, blocking a primary evacuation route for east Ottawa.
466.5 Low-lying sections of Fox River Park in Ottawa are inundated including Hudson Street River Walk. St. Clair Street is threatened in Ottawa.
465.5 Low-lying property near St. Elizabeth Medical Center is threatened. Marquette High School football threatened.
465 Harbor Walk in Heritage Harbor east of Ottawa is inundated.
464 Backwater causes the Fox River to reach bankfull near St. Elizabeth Medical Center in Ottawa.
462.5 Roadway entrance to Allen Park threatened in Ottawa. Allen Park west boat ramp inundated in Ottawa.
461 River Rescue boat dock inundated in Ottawa.
Photos
(1) Gage equipment located on top of levee near mouth of Fox River.
(2) Levee at Ottawa High School.
(3) Looking downstream from atop levee 9/3/2009. Gage height 459.80 ft.
(4) Looking upstream from atop levee 9/3/2009. Gage height 459.80 ft.
Low Water Impacts Collapse
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456.5 Low water levels begin to impact shipping interests along the river.
About This Location Collapse

Latitude: 41.344444° N, Longitude: 88.839167° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 463 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 Not Available 463 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?
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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
National Weather Service
Chicago Weather Forecast Office
333 W. University Dr.
Romeoville, IL 60446
(815) 834-1435
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