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Hydrograph River at a Glance Download Inundation
Mapping
Illinois River at Ottawa Stage (ft)Observed: 459.35 ft at 10:30AM Jan 24, 2023Observed: 459.47 ft at 10:45AM Jan 24, 2023Observed: 459.44 ft at 11:00AM Jan 24, 2023Observed: 459.42 ft at 11:15AM Jan 24, 2023Observed: 459.44 ft at 11:30AM Jan 24, 2023Observed: 459.46 ft at 11:45AM Jan 24, 2023Observed: 459.46 ft at 12:00PM Jan 24, 2023Observed: 459.53 ft at 12:15PM Jan 24, 2023Observed: 459.54 ft at 12:30PM Jan 24, 2023Observed: 459.71 ft at 12:45PM Jan 24, 2023Observed: 459.64 ft at 1:00PM Jan 24, 2023Observed: 459.65 ft at 1:15PM Jan 24, 2023Observed: 459.67 ft at 1:30PM Jan 24, 2023Observed: 459.67 ft at 1:45PM Jan 24, 2023Observed: 459.69 ft at 2:00PM Jan 24, 2023Observed: 459.69 ft at 2:15PM Jan 24, 2023Observed: 459.68 ft at 2:30PM Jan 24, 2023Observed: 459.68 ft at 2:45PM Jan 24, 2023Observed: 459.74 ft at 3:00PM Jan 24, 2023Observed: 459.68 ft at 3:15PM Jan 24, 2023Observed: 459.68 ft at 3:30PM Jan 24, 2023Observed: 459.66 ft at 3:45PM Jan 24, 2023Observed: 459.63 ft at 4:00PM Jan 24, 2023Observed: 459.63 ft at 4:15PM Jan 24, 2023Observed: 459.56 ft at 4:30PM Jan 24, 2023Observed: 459.56 ft at 4:45PM Jan 24, 2023Observed: 459.53 ft at 5:00PM Jan 24, 2023Observed: 459.49 ft at 5:15PM Jan 24, 2023Observed: 459.46 ft at 5:30PM Jan 24, 2023Observed: 459.42 ft at 5:45PM Jan 24, 2023Observed: 459.34 ft at 6:00PM Jan 24, 2023Observed: 459.33 ft at 6:15PM Jan 24, 2023Observed: 459.31 ft at 6:30PM Jan 24, 2023Observed: 459.28 ft at 6:45PM Jan 24, 2023Observed: 459.25 ft at 7:00PM Jan 24, 2023Observed: 459.22 ft at 7:15PM Jan 24, 2023Observed: 459.14 ft at 7:30PM Jan 24, 2023Observed: 459.14 ft at 7:45PM Jan 24, 2023Observed: 459.15 ft at 8:00PM Jan 24, 2023Observed: 459.08 ft at 8:15PM Jan 24, 2023Observed: 459.06 ft at 8:30PM Jan 24, 2023Observed: 459.06 ft at 8:45PM Jan 24, 2023Observed: 459.05 ft at 9:00PM Jan 24, 2023Observed: 459.06 ft at 9:15PM Jan 24, 2023Observed: 459.06 ft at 9:30PM Jan 24, 2023Observed: 459.05 ft at 9:45PM Jan 24, 2023Observed: 459.03 ft at 10:00PM Jan 24, 2023Observed: 459.01 ft at 10:15PM Jan 24, 2023Observed: 459 ft at 10:30PM Jan 24, 2023Observed: 458.99 ft at 10:45PM Jan 24, 2023Observed: 458.98 ft at 11:00PM Jan 24, 2023Observed: 458.98 ft at 11:15PM Jan 24, 2023Observed: 458.99 ft at 11:30PM Jan 24, 2023Observed: 459 ft at 11:45PM Jan 24, 2023Observed: 459 ft at 12:00AM Jan 25, 2023Observed: 458.98 ft at 12:15AM Jan 25, 2023Observed: 458.95 ft at 12:30AM Jan 25, 2023Observed: 458.96 ft at 12:45AM Jan 25, 2023Observed: 458.96 ft at 1:00AM Jan 25, 2023Observed: 458.96 ft at 1:15AM Jan 25, 2023Observed: 459.06 ft at 1:30AM Jan 25, 2023Observed: 458.96 ft at 1:45AM Jan 25, 2023Observed: 458.98 ft at 2:00AM Jan 25, 2023Observed: 458.97 ft at 2:15AM Jan 25, 2023Observed: 458.96 ft at 2:30AM Jan 25, 2023Observed: 458.98 ft at 2:45AM Jan 25, 2023Observed: 459 ft at 3:00AM Jan 25, 2023Observed: 459.02 ft at 3:15AM Jan 25, 2023Observed: 459.04 ft at 3:30AM Jan 25, 2023Observed: 459.1 ft at 3:45AM Jan 25, 2023Observed: 459.1 ft at 4:00AM Jan 25, 2023Observed: 459.12 ft at 4:15AM Jan 25, 2023Observed: 459.19 ft at 4:30AM Jan 25, 2023Observed: 459.2 ft at 4:45AM Jan 25, 2023Observed: 459.26 ft at 5:00AM Jan 25, 2023Observed: 459.27 ft at 5:15AM Jan 25, 2023Observed: 459.29 ft at 5:30AM Jan 25, 2023Observed: 459.31 ft at 5:45AM Jan 25, 2023Observed: 459.33 ft at 6:00AM Jan 25, 2023Observed: 459.36 ft at 6:15AM Jan 25, 2023Observed: 459.44 ft at 6:30AM Jan 25, 2023Observed: 459.45 ft at 6:45AM Jan 25, 2023Observed: 459.46 ft at 7:00AM Jan 25, 2023Observed: 459.49 ft at 7:15AM Jan 25, 2023Observed: 459.52 ft at 7:30AM Jan 25, 2023Observed: 459.68 ft at 7:45AM Jan 25, 2023Observed: 459.66 ft at 8:00AM Jan 25, 2023Observed: 459.67 ft at 8:15AM Jan 25, 2023Observed: 459.69 ft at 8:30AM Jan 25, 2023Observed: 459.71 ft at 8:45AM Jan 25, 2023Observed: 459.74 ft at 9:00AM Jan 25, 2023Observed: 459.76 ft at 9:15AM Jan 25, 2023Observed: 459.73 ft at 9:30AM Jan 25, 2023Observed: 459.71 ft at 9:45AM Jan 25, 2023Observed: 459.69 ft at 10:00AM Jan 25, 2023Observed: 459.67 ft at 10:15AM Jan 25, 2023Observed: 459.66 ft at 10:30AM Jan 25, 2023Observed: 459.65 ft at 10:45AM Jan 25, 2023Observed: 459.63 ft at 11:00AM Jan 25, 2023Observed: 459.62 ft at 11:15AM Jan 25, 2023Observed: 459.63 ft at 11:30AM Jan 25, 2023Observed: 459.63 ft at 11:45AM Jan 25, 2023Observed: 459.62 ft at 12:00PM Jan 25, 2023Observed: 459.61 ft at 12:15PM Jan 25, 2023Observed: 459.6 ft at 12:30PM Jan 25, 2023Observed: 459.6 ft at 12:45PM Jan 25, 2023Observed: 459.59 ft at 1:00PM Jan 25, 2023Observed: 459.59 ft at 1:15PM Jan 25, 2023Observed: 459.58 ft at 1:30PM Jan 25, 2023Observed: 459.57 ft at 1:45PM Jan 25, 2023Observed: 459.56 ft at 2:00PM Jan 25, 2023Observed: 459.56 ft at 2:15PM Jan 25, 2023Observed: 459.55 ft at 2:30PM Jan 25, 2023Observed: 459.54 ft at 2:45PM Jan 25, 2023Observed: 459.54 ft at 3:00PM Jan 25, 2023Observed: 459.48 ft at 3:15PM Jan 25, 2023Observed: 459.48 ft at 3:30PM Jan 25, 2023Observed: 459.58 ft at 3:45PM Jan 25, 2023Observed: 459.49 ft at 4:00PM Jan 25, 2023Observed: 459.49 ft at 4:15PM Jan 25, 2023Observed: 459.47 ft at 4:30PM Jan 25, 2023Observed: 459.46 ft at 4:45PM Jan 25, 2023Observed: 459.46 ft at 5:00PM Jan 25, 2023Observed: 459.45 ft at 5:15PM Jan 25, 2023Observed: 459.44 ft at 5:30PM Jan 25, 2023Observed: 459.42 ft at 5:45PM Jan 25, 2023Observed: 459.41 ft at 6:00PM Jan 25, 2023Observed: 459.4 ft at 6:15PM Jan 25, 2023Observed: 459.25 ft at 6:30PM Jan 25, 2023Observed: 459.32 ft at 6:45PM Jan 25, 2023Observed: 459.3 ft at 7:00PM Jan 25, 2023Observed: 459.29 ft at 7:15PM Jan 25, 2023Observed: 459.27 ft at 7:30PM Jan 25, 2023Observed: 459.34 ft at 7:45PM Jan 25, 2023Observed: 459.33 ft at 8:00PM Jan 25, 2023Observed: 459.33 ft at 8:15PM Jan 25, 2023Observed: 459.36 ft at 8:30PM Jan 25, 2023Observed: 459.39 ft at 8:45PM Jan 25, 2023Observed: 459.5 ft at 9:00PM Jan 25, 2023Observed: 459.44 ft at 9:15PM Jan 25, 2023Observed: 459.45 ft at 9:30PM Jan 25, 2023Observed: 459.47 ft at 9:45PM Jan 25, 2023Observed: 459.48 ft at 10:00PM Jan 25, 2023Observed: 459.51 ft at 10:15PM Jan 25, 2023Observed: 459.52 ft at 10:30PM Jan 25, 2023Observed: 459.53 ft at 10:45PM Jan 25, 2023Observed: 459.53 ft at 11:00PM Jan 25, 2023Observed: 459.54 ft at 11:15PM Jan 25, 2023Observed: 459.57 ft at 11:30PM Jan 25, 2023Observed: 459.56 ft at 11:45PM Jan 25, 2023Observed: 459.57 ft at 12:00AM Jan 26, 2023Observed: 459.65 ft at 12:15AM Jan 26, 2023Observed: 459.63 ft at 12:30AM Jan 26, 2023Observed: 459.6 ft at 12:45AM Jan 26, 2023Observed: 459.66 ft at 1:00AM Jan 26, 2023Observed: 459.65 ft at 1:15AM Jan 26, 2023Observed: 459.64 ft at 1:30AM Jan 26, 2023Observed: 459.66 ft at 1:45AM Jan 26, 2023Observed: 459.73 ft at 2:00AM Jan 26, 2023Observed: 459.7 ft at 2:15AM Jan 26, 2023Observed: 459.69 ft at 2:30AM Jan 26, 2023Observed: 459.68 ft at 2:45AM Jan 26, 2023Observed: 459.69 ft at 3:00AM Jan 26, 2023Observed: 459.7 ft at 3:15AM Jan 26, 2023Observed: 459.72 ft at 3:30AM Jan 26, 2023Observed: 459.81 ft at 3:45AM Jan 26, 2023Observed: 459.74 ft at 4:00AM Jan 26, 2023Observed: 459.74 ft at 4:15AM Jan 26, 2023Observed: 459.72 ft at 4:30AM Jan 26, 2023Observed: 459.71 ft at 4:45AM Jan 26, 2023Observed: 459.62 ft at 5:00AM Jan 26, 2023Observed: 459.63 ft at 5:15AM Jan 26, 2023Observed: 459.58 ft at 5:30AM Jan 26, 2023Observed: 459.55 ft at 5:45AM Jan 26, 2023Observed: 459.48 ft at 6:00AM Jan 26, 2023Observed: 459.46 ft at 6:15AM Jan 26, 2023Observed: 459.4 ft at 6:30AM Jan 26, 2023Observed: 459.34 ft at 6:45AM Jan 26, 2023Observed: 459.35 ft at 7:00AM Jan 26, 2023Observed: 459.32 ft at 7:15AM Jan 26, 2023Observed: 459.29 ft at 7:30AM Jan 26, 2023Observed: 459.26 ft at 7:45AM Jan 26, 2023Observed: 459.21 ft at 8:00AM Jan 26, 2023Observed: 459.18 ft at 8:15AM Jan 26, 2023Observed: 459.07 ft at 8:30AM Jan 26, 2023Observed: 459.16 ft at 8:45AM Jan 26, 2023Observed: 459.22 ft at 9:00AM Jan 26, 2023Observed: 459.14 ft at 9:15AM Jan 26, 2023Observed: 459.12 ft at 9:30AM Jan 26, 2023Observed: 459.14 ft at 9:45AM Jan 26, 2023Observed: 459.11 ft at 10:00AM Jan 26, 2023Observed: 458.95 ft at 10:15AM Jan 26, 2023Observed: 459.1 ft at 10:30AM Jan 26, 2023Observed: 459.11 ft at 10:45AM Jan 26, 2023Observed: 459.13 ft at 11:00AM Jan 26, 2023Observed: 459.08 ft at 11:15AM Jan 26, 2023Observed: 459.2 ft at 11:30AM Jan 26, 2023Observed: 459.02 ft at 11:45AM Jan 26, 2023Observed: 459.07 ft at 12:00PM Jan 26, 2023Observed: 459.06 ft at 12:15PM Jan 26, 2023Observed: 459.06 ft at 12:30PM Jan 26, 2023Observed: 459.15 ft at 12:45PM Jan 26, 2023Observed: 459.15 ft at 1:00PM Jan 26, 2023Observed: 459.24 ft at 1:15PM Jan 26, 2023Observed: 459.23 ft at 1:30PM Jan 26, 2023Observed: 459.23 ft at 1:45PM Jan 26, 2023Observed: 459.22 ft at 2:00PM Jan 26, 2023Observed: 459.22 ft at 2:15PM Jan 26, 2023Observed: 459.21 ft at 2:30PM Jan 26, 2023Observed: 459.28 ft at 2:45PM Jan 26, 2023Observed: 459.28 ft at 3:00PM Jan 26, 2023Observed: 459.27 ft at 3:15PM Jan 26, 2023Observed: 459.27 ft at 3:30PM Jan 26, 2023Observed: 459.27 ft at 3:45PM Jan 26, 2023Observed: 459.27 ft at 4:00PM Jan 26, 2023Observed: 459.3 ft at 4:15PM Jan 26, 2023Observed: 459.33 ft at 4:30PM Jan 26, 2023Observed: 459.33 ft at 4:45PM Jan 26, 2023Observed: 459.34 ft at 5:00PM Jan 26, 2023Observed: 459.36 ft at 5:15PM Jan 26, 2023Observed: 459.36 ft at 5:30PM Jan 26, 2023Observed: 459.39 ft at 5:45PM Jan 26, 2023Observed: 459.38 ft at 6:00PM Jan 26, 2023Observed: 459.38 ft at 6:15PM Jan 26, 2023Observed: 459.39 ft at 6:30PM Jan 26, 2023Observed: 459.3 ft at 6:45PM Jan 26, 2023Observed: 459.38 ft at 7:00PM Jan 26, 2023Observed: 459.4 ft at 7:15PM Jan 26, 2023Observed: 459.42 ft at 7:30PM Jan 26, 2023Observed: 459.43 ft at 7:45PM Jan 26, 2023Observed: 459.45 ft at 8:00PM Jan 26, 2023Observed: 459.48 ft at 8:15PM Jan 26, 2023Observed: 459.47 ft at 8:30PM Jan 26, 2023Observed: 459.49 ft at 8:45PM Jan 26, 2023Observed: 459.51 ft at 9:00PM Jan 26, 2023Observed: 459.52 ft at 9:15PM Jan 26, 2023Observed: 459.55 ft at 9:30PM Jan 26, 2023Observed: 459.58 ft at 9:45PM Jan 26, 2023Observed: 459.59 ft at 10:00PM Jan 26, 2023Observed: 459.66 ft at 10:15PM Jan 26, 2023Observed: 459.65 ft at 10:30PM Jan 26, 2023Observed: 459.68 ft at 10:45PM Jan 26, 2023Observed: 459.66 ft at 11:00PM Jan 26, 2023Observed: 459.67 ft at 11:15PM Jan 26, 2023Observed: 459.68 ft at 11:30PM Jan 26, 2023Observed: 459.69 ft at 11:45PM Jan 26, 2023Observed: 459.67 ft at 12:00AM Jan 27, 2023Observed: 459.67 ft at 12:15AM Jan 27, 2023Observed: 459.66 ft at 12:30AM Jan 27, 2023Observed: 459.64 ft at 12:45AM Jan 27, 2023Observed: 459.63 ft at 1:00AM Jan 27, 2023Observed: 459.62 ft at 1:15AM Jan 27, 2023Observed: 459.62 ft at 1:30AM Jan 27, 2023Observed: 459.62 ft at 1:45AM Jan 27, 2023Observed: 459.6 ft at 2:00AM Jan 27, 2023Observed: 459.58 ft at 2:15AM Jan 27, 2023Observed: 459.57 ft at 2:30AM Jan 27, 2023Observed: 459.56 ft at 2:45AM Jan 27, 2023Observed: 459.56 ft at 3:00AM Jan 27, 2023Observed: 459.55 ft at 3:15AM Jan 27, 2023Observed: 459.56 ft at 3:30AM Jan 27, 2023Observed: 459.57 ft at 3:45AM Jan 27, 2023Observed: 459.54 ft at 4:00AM Jan 27, 2023Observed: 459.51 ft at 4:15AM Jan 27, 2023Observed: 459.5 ft at 4:30AM Jan 27, 2023Observed: 459.48 ft at 4:45AM Jan 27, 2023Observed: 459.47 ft at 5:00AM Jan 27, 2023Observed: 459.47 ft at 5:15AM Jan 27, 2023Observed: 459.47 ft at 5:30AM Jan 27, 2023Observed: 459.45 ft at 5:45AM Jan 27, 2023Observed: 459.43 ft at 6:00AM Jan 27, 2023Observed: 459.42 ft at 6:15AM Jan 27, 2023Observed: 459.41 ft at 6:30AM Jan 27, 2023Observed: 459.41 ft at 6:45AM Jan 27, 2023Observed: 459.4 ft at 7:00AM Jan 27, 2023Observed: 459.4 ft at 7:15AM Jan 27, 2023Observed: 459.19 ft at 7:30AM Jan 27, 2023Observed: 459.31 ft at 7:45AM Jan 27, 2023Observed: 459.32 ft at 8:00AM Jan 27, 2023Observed: 459.32 ft at 8:15AM Jan 27, 2023Observed: 459.3 ft at 8:30AM Jan 27, 2023Observed: 459.3 ft at 8:45AM Jan 27, 2023Observed: 459.28 ft at 9:00AM Jan 27, 2023Observed: 459.27 ft at 9:15AM Jan 27, 2023Observed: 459.28 ft at 9:30AM Jan 27, 2023Observed: 459.26 ft at 9:45AM Jan 27, 2023Observed: 459.24 ft at 10:00AM Jan 27, 2023Observed: 459.2 ft at 10:15AM Jan 27, 2023Observed: 459.27 ft at 10:30AM Jan 27, 2023Observed: 459.23 ft at 10:45AM Jan 27, 2023Observed: 459.21 ft at 11:00AM Jan 27, 2023Observed: 459.19 ft at 11:15AM Jan 27, 2023Observed: 459.09 ft at 11:30AM Jan 27, 2023Observed: 459.09 ft at 11:45AM Jan 27, 2023Observed: 459.06 ft at 12:00PM Jan 27, 2023Observed: 459.05 ft at 12:15PM Jan 27, 2023Observed: 459.06 ft at 12:30PM Jan 27, 2023Observed: 459.21 ft at 12:45PM Jan 27, 2023Observed: 459.13 ft at 1:00PM Jan 27, 2023Observed: 459.19 ft at 1:15PM Jan 27, 2023Observed: 459.2 ft at 1:30PM Jan 27, 2023Observed: 459.18 ft at 1:45PM Jan 27, 2023Observed: 459.23 ft at 2:00PM Jan 27, 2023Observed: 459.23 ft at 2:15PM Jan 27, 2023Observed: 459.24 ft at 2:30PM Jan 27, 2023Observed: 459.25 ft at 2:45PM Jan 27, 2023Observed: 459.27 ft at 3:00PM Jan 27, 2023Observed: 459.29 ft at 3:15PM Jan 27, 2023Observed: 459.29 ft at 3:30PM Jan 27, 2023Observed: 459.29 ft at 3:45PM Jan 27, 2023Observed: 459.28 ft at 4:00PM Jan 27, 2023Observed: 459.26 ft at 4:15PM Jan 27, 2023Observed: 459.25 ft at 4:30PM Jan 27, 2023Observed: 459.26 ft at 4:45PM Jan 27, 2023Observed: 459.11 ft at 5:00PM Jan 27, 2023Observed: 459.1 ft at 5:15PM Jan 27, 2023Observed: 459.08 ft at 5:30PM Jan 27, 2023Observed: 459.07 ft at 5:45PM Jan 27, 2023Observed: 459.15 ft at 6:00PM Jan 27, 2023Observed: 459.13 ft at 6:15PM Jan 27, 2023Observed: 459.08 ft at 6:30PM Jan 27, 2023Observed: 459.07 ft at 6:45PM Jan 27, 2023Observed: 459.06 ft at 7:00PM Jan 27, 2023Observed: 459.04 ft at 7:15PM Jan 27, 2023Observed: 459.02 ft at 7:30PM Jan 27, 2023Observed: 458.95 ft at 7:45PM Jan 27, 2023Observed: 458.95 ft at 8:00PM Jan 27, 2023Observed: 458.98 ft at 8:15PM Jan 27, 2023Observed: 458.98 ft at 8:30PM Jan 27, 2023Observed: 458.99 ft at 8:45PM Jan 27, 2023Observed: 459.03 ft at 9:00PM Jan 27, 2023Observed: 459.06 ft at 9:15PM Jan 27, 2023Observed: 459.07 ft at 9:30PM Jan 27, 2023Observed: 459.06 ft at 9:45PM Jan 27, 2023Observed: 459.08 ft at 10:00PM Jan 27, 2023Observed: 459.07 ft at 10:15PM Jan 27, 2023Observed: 459.07 ft at 10:30PM Jan 27, 2023Observed: 459.09 ft at 10:45PM Jan 27, 2023Observed: 459.11 ft at 11:00PM Jan 27, 2023Observed: 459.13 ft at 11:15PM Jan 27, 2023Observed: 459.22 ft at 11:30PM Jan 27, 2023Observed: 459.2 ft at 11:45PM Jan 27, 2023Observed: 459.19 ft at 12:00AM Jan 28, 2023Observed: 459.18 ft at 12:15AM Jan 28, 2023Observed: 459.16 ft at 12:30AM Jan 28, 2023Observed: 459.15 ft at 12:45AM Jan 28, 2023Observed: 459.15 ft at 1:00AM Jan 28, 2023Observed: 459.22 ft at 1:15AM Jan 28, 2023Observed: 459.28 ft at 1:30AM Jan 28, 2023Observed: 459.3 ft at 1:45AM Jan 28, 2023Observed: 459.46 ft at 2:00AM Jan 28, 2023Highest Observation: 459.82 ft at 4:15AM Jan 28, 2023Observed: 459.8 ft at 4:30AM Jan 28, 2023Observed: 459.78 ft at 4:45AM Jan 28, 2023Observed: 459.59 ft at 5:00AM Jan 28, 2023Observed: 459.61 ft at 5:15AM Jan 28, 2023Observed: 459.76 ft at 5:30AM Jan 28, 2023Observed: 459.55 ft at 5:45AM Jan 28, 2023Observed: 459.54 ft at 6:00AM Jan 28, 2023Observed: 459.54 ft at 6:15AM Jan 28, 2023Observed: 459.52 ft at 6:30AM Jan 28, 2023Observed: 459.57 ft at 6:45AM Jan 28, 2023Observed: 459.58 ft at 7:00AM Jan 28, 2023Observed: 459.34 ft at 7:15AM Jan 28, 2023Observed: 459.54 ft at 7:30AM Jan 28, 2023Observed: 459.52 ft at 7:45AM Jan 28, 2023Observed: 459.53 ft at 8:00AM Jan 28, 2023Observed: 459.56 ft at 8:15AM Jan 28, 2023Observed: 459.57 ft at 8:30AM Jan 28, 2023Observed: 459.57 ft at 8:45AM Jan 28, 2023Observed: 459.59 ft at 9:00AM Jan 28, 2023Observed: 459.62 ft at 9:15AM Jan 28, 2023Observed: 459.63 ft at 9:30AM Jan 28, 2023Observed: 459.54 ft at 9:45AM Jan 28, 2023Observed: 459.68 ft at 10:00AM Jan 28, 2023Observed: 459.66 ft at 10:15AM Jan 28, 2023Observed: 459.66 ft at 10:30AM Jan 28, 2023Observed: 459.66 ft at 10:45AM Jan 28, 2023Observed: 459.75 ft at 11:00AM Jan 28, 2023Observed: 459.67 ft at 11:15AM Jan 28, 2023Observed: 459.65 ft at 11:30AM Jan 28, 2023Observed: 459.63 ft at 11:45AM Jan 28, 2023Observed: 459.6 ft at 12:00PM Jan 28, 2023Observed: 459.57 ft at 12:15PM Jan 28, 2023Observed: 459.54 ft at 12:30PM Jan 28, 2023Observed: 459.51 ft at 12:45PM Jan 28, 2023Observed: 459.49 ft at 1:00PM Jan 28, 2023Observed: 459.49 ft at 1:15PM Jan 28, 2023Observed: 459.42 ft at 1:30PM Jan 28, 2023Observed: 459.42 ft at 1:45PM Jan 28, 2023Observed: 459.4 ft at 2:00PM Jan 28, 2023Observed: 459.37 ft at 2:15PM Jan 28, 2023Observed: 459.34 ft at 2:30PM Jan 28, 2023Observed: 459.25 ft at 2:45PM Jan 28, 2023Observed: 459.26 ft at 3:00PM Jan 28, 2023Observed: 459.26 ft at 3:15PM Jan 28, 2023Observed: 459.24 ft at 3:30PM Jan 28, 2023Observed: 459.2 ft at 3:45PM Jan 28, 2023Observed: 459.24 ft at 4:00PM Jan 28, 2023Observed: 459.14 ft at 4:15PM Jan 28, 2023Observed: 459.13 ft at 4:30PM Jan 28, 2023Observed: 459.11 ft at 4:45PM Jan 28, 2023Observed: 459.09 ft at 5:00PM Jan 28, 2023Observed: 459.06 ft at 5:15PM Jan 28, 2023Observed: 459.07 ft at 5:30PM Jan 28, 2023Observed: 458.99 ft at 5:45PM Jan 28, 2023Observed: 458.97 ft at 6:00PM Jan 28, 2023Observed: 458.96 ft at 6:15PM Jan 28, 2023Observed: 458.94 ft at 6:30PM Jan 28, 2023Observed: 458.92 ft at 6:45PM Jan 28, 2023Observed: 458.94 ft at 7:00PM Jan 28, 2023Observed: 458.96 ft at 7:15PM Jan 28, 2023Observed: 459.1 ft at 7:30PM Jan 28, 2023Observed: 459.04 ft at 7:45PM Jan 28, 2023Observed: 459.04 ft at 8:00PM Jan 28, 2023Observed: 459.06 ft at 8:15PM Jan 28, 2023Observed: 459.09 ft at 8:30PM Jan 28, 2023Observed: 459.1 ft at 8:45PM Jan 28, 2023Observed: 459.12 ft at 9:00PM Jan 28, 2023Observed: 459.15 ft at 9:15PM Jan 28, 2023Observed: 459.17 ft at 9:30PM Jan 28, 2023Observed: 459.18 ft at 9:45PM Jan 28, 2023Observed: 459.21 ft at 10:00PM Jan 28, 2023Observed: 459.21 ft at 10:15PM Jan 28, 2023Observed: 459.23 ft at 10:30PM Jan 28, 2023Observed: 459.26 ft at 10:45PM Jan 28, 2023Observed: 459.29 ft at 11:00PM Jan 28, 2023Observed: 459.3 ft at 11:15PM Jan 28, 2023Observed: 459.31 ft at 11:30PM Jan 28, 2023Observed: 459.32 ft at 11:45PM Jan 28, 2023Observed: 459.33 ft at 12:00AM Jan 29, 2023Observed: 459.35 ft at 12:15AM Jan 29, 2023Observed: 459.45 ft at 12:30AM Jan 29, 2023Observed: 459.39 ft at 12:45AM Jan 29, 2023Observed: 459.41 ft at 1:00AM Jan 29, 2023Observed: 459.42 ft at 1:15AM Jan 29, 2023Observed: 459.44 ft at 1:30AM Jan 29, 2023Observed: 459.45 ft at 1:45AM Jan 29, 2023Observed: 459.47 ft at 2:00AM Jan 29, 2023Observed: 459.5 ft at 2:15AM Jan 29, 2023Observed: 459.52 ft at 2:30AM Jan 29, 2023Observed: 459.5 ft at 2:45AM Jan 29, 2023Observed: 459.49 ft at 3:00AM Jan 29, 2023Observed: 459.46 ft at 3:15AM Jan 29, 2023Observed: 459.45 ft at 3:30AM Jan 29, 2023Observed: 459.43 ft at 3:45AM Jan 29, 2023Observed: 459.42 ft at 4:00AM Jan 29, 2023Observed: 459.4 ft at 4:15AM Jan 29, 2023Observed: 459.4 ft at 4:30AM Jan 29, 2023Observed: 459.39 ft at 4:45AM Jan 29, 2023Observed: 459.38 ft at 5:00AM Jan 29, 2023Observed: 459.36 ft at 5:15AM Jan 29, 2023Observed: 459.36 ft at 5:30AM Jan 29, 2023Observed: 459.36 ft at 5:45AM Jan 29, 2023Observed: 459.44 ft at 6:00AM Jan 29, 2023Observed: 459.35 ft at 6:15AM Jan 29, 2023Observed: 459.35 ft at 6:30AM Jan 29, 2023Observed: 459.34 ft at 6:45AM Jan 29, 2023Observed: 459.27 ft at 7:00AM Jan 29, 2023Observed: 459.34 ft at 7:15AM Jan 29, 2023Observed: 459.33 ft at 7:30AM Jan 29, 2023Observed: 459.29 ft at 7:45AM Jan 29, 2023Observed: 459.26 ft at 8:00AM Jan 29, 2023Observed: 459.24 ft at 8:15AM Jan 29, 2023Observed: 459.13 ft at 8:30AM Jan 29, 2023Observed: 459.24 ft at 8:45AM Jan 29, 2023Observed: 459.25 ft at 9:00AM Jan 29, 2023Observed: 459.24 ft at 9:15AM Jan 29, 2023Observed: 459.23 ft at 9:30AM Jan 29, 2023Observed: 459.22 ft at 9:45AM Jan 29, 2023Observed: 459.18 ft at 10:00AM Jan 29, 2023Observed: 459.17 ft at 10:15AM Jan 29, 2023Observed: 459.11 ft at 10:30AM Jan 29, 2023Observed: 459.11 ft at 10:45AM Jan 29, 2023Observed: 459.09 ft at 11:00AM Jan 29, 2023Observed: 459.08 ft at 11:15AM Jan 29, 2023Observed: 459.07 ft at 11:30AM Jan 29, 2023Observed: 459.05 ft at 11:45AM Jan 29, 2023Observed: 459.03 ft at 12:00PM Jan 29, 2023Observed: 459.09 ft at 12:15PM Jan 29, 2023Observed: 458.97 ft at 12:30PM Jan 29, 2023Observed: 458.97 ft at 12:45PM Jan 29, 2023Observed: 458.98 ft at 1:00PM Jan 29, 2023Observed: 458.98 ft at 1:15PM Jan 29, 2023Observed: 459 ft at 1:30PM Jan 29, 2023Observed: 459.02 ft at 1:45PM Jan 29, 2023Observed: 459.03 ft at 2:00PM Jan 29, 2023Observed: 459.04 ft at 2:15PM Jan 29, 2023Observed: 459.04 ft at 2:30PM Jan 29, 2023Observed: 459.05 ft at 2:45PM Jan 29, 2023Observed: 459.04 ft at 3:00PM Jan 29, 2023Observed: 459.03 ft at 3:15PM Jan 29, 2023Observed: 459.01 ft at 3:30PM Jan 29, 2023Observed: 459 ft at 3:45PM Jan 29, 2023Observed: 458.99 ft at 4:00PM Jan 29, 2023Observed: 458.99 ft at 4:15PM Jan 29, 2023Observed: 459 ft at 4:30PM Jan 29, 2023Observed: 458.97 ft at 4:45PM Jan 29, 2023Observed: 458.98 ft at 5:00PM Jan 29, 2023Observed: 458.99 ft at 5:15PM Jan 29, 2023Observed: 459 ft at 5:30PM Jan 29, 2023Observed: 459.01 ft at 5:45PM Jan 29, 2023Observed: 459.01 ft at 6:00PM Jan 29, 2023Observed: 459.03 ft at 6:15PM Jan 29, 2023Observed: 459.02 ft at 6:30PM Jan 29, 2023Observed: 459 ft at 6:45PM Jan 29, 2023Observed: 458.99 ft at 7:00PM Jan 29, 2023Observed: 458.98 ft at 7:15PM Jan 29, 2023Observed: 458.97 ft at 7:30PM Jan 29, 2023Observed: 458.97 ft at 7:45PM Jan 29, 2023Observed: 458.97 ft at 8:00PM Jan 29, 2023Observed: 458.98 ft at 8:15PM Jan 29, 2023Observed: 458.98 ft at 8:30PM Jan 29, 2023Observed: 458.98 ft at 8:45PM Jan 29, 2023Observed: 458.97 ft at 9:00PM Jan 29, 2023Observed: 458.97 ft at 9:15PM Jan 29, 2023Observed: 458.98 ft at 9:30PM Jan 29, 2023Observed: 458.96 ft at 9:45PM Jan 29, 2023Observed: 459.07 ft at 10:00PM Jan 29, 2023Observed: 458.96 ft at 10:15PM Jan 29, 2023Observed: 458.97 ft at 10:30PM Jan 29, 2023Observed: 458.99 ft at 10:45PM Jan 29, 2023Observed: 459.01 ft at 11:00PM Jan 29, 2023Observed: 459.03 ft at 11:15PM Jan 29, 2023Observed: 459.05 ft at 11:30PM Jan 29, 2023Observed: 459.04 ft at 11:45PM Jan 29, 2023Observed: 459.03 ft at 12:00AM Jan 30, 2023Observed: 459.04 ft at 12:15AM Jan 30, 2023Observed: 459.04 ft at 12:30AM Jan 30, 2023Observed: 459.05 ft at 12:45AM Jan 30, 2023Observed: 459.06 ft at 1:00AM Jan 30, 2023Observed: 459.07 ft at 1:15AM Jan 30, 2023Observed: 459.08 ft at 1:30AM Jan 30, 2023Observed: 459.09 ft at 1:45AM Jan 30, 2023Observed: 459.18 ft at 2:00AM Jan 30, 2023Observed: 459.11 ft at 2:15AM Jan 30, 2023Observed: 459.12 ft at 2:30AM Jan 30, 2023Observed: 459.13 ft at 2:45AM Jan 30, 2023Observed: 459.14 ft at 3:00AM Jan 30, 2023Observed: 459.14 ft at 3:15AM Jan 30, 2023Observed: 459.16 ft at 3:30AM Jan 30, 2023Observed: 459.17 ft at 3:45AM Jan 30, 2023Observed: 459.18 ft at 4:00AM Jan 30, 2023Observed: 459.2 ft at 4:15AM Jan 30, 2023Observed: 459.21 ft at 4:30AM Jan 30, 2023Observed: 459.22 ft at 4:45AM Jan 30, 2023Observed: 459.22 ft at 5:00AM Jan 30, 2023Observed: 459.23 ft at 5:15AM Jan 30, 2023Observed: 459.23 ft at 5:30AM Jan 30, 2023Observed: 459.23 ft at 5:45AM Jan 30, 2023Observed: 459.23 ft at 6:00AM Jan 30, 2023Observed: 459.24 ft at 6:15AM Jan 30, 2023Observed: 459.26 ft at 6:30AM Jan 30, 2023Observed: 459.28 ft at 6:45AM Jan 30, 2023Observed: 459.3 ft at 7:00AM Jan 30, 2023Observed: 459.32 ft at 7:15AM Jan 30, 2023Observed: 459.34 ft at 7:30AM Jan 30, 2023Observed: 459.35 ft at 7:45AM Jan 30, 2023Observed: 459.35 ft at 8:00AM Jan 30, 2023Observed: 459.43 ft at 8:15AM Jan 30, 2023Observed: 459.41 ft at 8:30AM Jan 30, 2023Observed: 459.4 ft at 8:45AM Jan 30, 2023Observed: 459.39 ft at 9:00AM Jan 30, 2023Observed: 459.4 ft at 9:15AM Jan 30, 2023Observed: 459.41 ft at 9:30AM Jan 30, 2023Observed: 459.42 ft at 9:45AM Jan 30, 2023Observed: 459.42 ft at 10:00AM Jan 30, 2023Observed: 459.43 ft at 10:15AM Jan 30, 2023Observed: 459.45 ft at 10:30AM Jan 30, 2023Observed: 459.47 ft at 10:45AM Jan 30, 2023Observed: 459.48 ft at 11:00AM Jan 30, 2023Observed: 459.46 ft at 11:15AM Jan 30, 2023Observed: 459.52 ft at 11:30AM Jan 30, 2023Observed: 459.5 ft at 11:45AM Jan 30, 2023Observed: 459.51 ft at 12:00PM Jan 30, 2023Observed: 459.5 ft at 12:15PM Jan 30, 2023Observed: 459.42 ft at 12:30PM Jan 30, 2023Observed: 459.51 ft at 12:45PM Jan 30, 2023Observed: 459.44 ft at 1:00PM Jan 30, 2023Observed: 459.44 ft at 1:15PM Jan 30, 2023Observed: 459.45 ft at 1:30PM Jan 30, 2023Observed: 459.46 ft at 1:45PM Jan 30, 2023Observed: 459.35 ft at 2:00PM Jan 30, 2023Observed: 459.33 ft at 2:15PM Jan 30, 2023Observed: 459.21 ft at 2:30PM Jan 30, 2023Observed: 459.26 ft at 2:45PM Jan 30, 2023Observed: 459.2 ft at 3:00PM Jan 30, 2023Observed: 459.1 ft at 3:15PM Jan 30, 2023Observed: 459.08 ft at 3:30PM Jan 30, 2023Observed: 459.01 ft at 3:45PM Jan 30, 2023Observed: 458.99 ft at 4:00PM Jan 30, 2023Observed: 458.96 ft at 4:15PM Jan 30, 2023Observed: 458.96 ft at 4:30PM Jan 30, 2023Observed: 459.02 ft at 4:45PM Jan 30, 2023Observed: 458.9 ft at 5:00PM Jan 30, 2023Observed: 458.93 ft at 5:15PM Jan 30, 2023Observed: 458.94 ft at 5:30PM Jan 30, 2023Observed: 458.85 ft at 5:45PM Jan 30, 2023Observed: 458.86 ft at 6:00PM Jan 30, 2023Observed: 459.03 ft at 6:15PM Jan 30, 2023Observed: 458.86 ft at 6:30PM Jan 30, 2023Observed: 458.88 ft at 6:45PM Jan 30, 2023Observed: 458.89 ft at 7:00PM Jan 30, 2023Observed: 458.91 ft at 7:15PM Jan 30, 2023Observed: 458.92 ft at 7:30PM Jan 30, 2023Observed: 458.93 ft at 7:45PM Jan 30, 2023Observed: 458.95 ft at 8:00PM Jan 30, 2023Observed: 458.96 ft at 8:15PM Jan 30, 2023Observed: 458.99 ft at 8:30PM Jan 30, 2023Observed: 458.99 ft at 8:45PM Jan 30, 2023Observed: 458.98 ft at 9:00PM Jan 30, 2023Observed: 458.97 ft at 9:15PM Jan 30, 2023Observed: 458.98 ft at 9:30PM Jan 30, 2023Observed: 458.97 ft at 9:45PM Jan 30, 2023Observed: 458.97 ft at 10:00PM Jan 30, 2023Observed: 458.98 ft at 10:15PM Jan 30, 2023Observed: 458.97 ft at 10:30PM Jan 30, 2023Observed: 458.96 ft at 10:45PM Jan 30, 2023Observed: 458.97 ft at 11:00PM Jan 30, 2023Observed: 459.06 ft at 11:15PM Jan 30, 2023Observed: 459 ft at 11:30PM Jan 30, 2023Observed: 459 ft at 11:45PM Jan 30, 2023Observed: 458.98 ft at 12:00AM Jan 31, 2023Observed: 458.98 ft at 12:15AM Jan 31, 2023Observed: 459 ft at 12:30AM Jan 31, 2023Observed: 459.01 ft at 12:45AM Jan 31, 2023Observed: 459 ft at 1:00AM Jan 31, 2023Observed: 459 ft at 1:15AM Jan 31, 2023Observed: 458.99 ft at 1:30AM Jan 31, 2023Observed: 458.99 ft at 1:45AM Jan 31, 2023Observed: 458.99 ft at 2:00AM Jan 31, 2023Observed: 458.99 ft at 2:15AM Jan 31, 2023Observed: 459.05 ft at 2:30AM Jan 31, 2023Observed: 459.03 ft at 2:45AM Jan 31, 2023Observed: 459.01 ft at 3:00AM Jan 31, 2023Observed: 458.99 ft at 3:15AM Jan 31, 2023Observed: 458.99 ft at 3:30AM Jan 31, 2023Observed: 459.04 ft at 3:45AM Jan 31, 2023Observed: 459.05 ft at 4:00AM Jan 31, 2023Observed: 459.03 ft at 4:15AM Jan 31, 2023Observed: 459.01 ft at 4:30AM Jan 31, 2023Observed: 459.02 ft at 4:45AM Jan 31, 2023Observed: 459.01 ft at 5:00AM Jan 31, 2023Observed: 459 ft at 5:15AM Jan 31, 2023Observed: 459.02 ft at 5:30AM Jan 31, 2023Observed: 459.01 ft at 5:45AM Jan 31, 2023Observed: 459.03 ft at 6:00AM Jan 31, 2023Observed: 459.07 ft at 6:15AM Jan 31, 2023Observed: 459.08 ft at 6:30AM Jan 31, 2023Observed: 459.06 ft at 6:45AM Jan 31, 2023Observed: 459.07 ft at 7:00AM Jan 31, 2023Observed: 459.07 ft at 7:15AM Jan 31, 2023Observed: 459.13 ft at 7:30AM Jan 31, 2023Observed: 459.07 ft at 7:45AM Jan 31, 2023Observed: 459.06 ft at 8:00AM Jan 31, 2023Observed: 459.05 ft at 8:15AM Jan 31, 2023Observed: 459.05 ft at 8:30AM Jan 31, 2023Observed: 459.05 ft at 8:45AM Jan 31, 2023Observed: 459.06 ft at 9:00AM Jan 31, 2023Observed: 459.05 ft at 9:15AM Jan 31, 2023Observed: 459.06 ft at 9:30AM Jan 31, 2023US Army Corps of EngineersOTWI2(plotting HGIRG) Graph Created (10:26AM Jan 31, 2023)ObservedLatest observed value: 459.06 ft at 9:30 AM CST 31-Jan-2023. Flood Stage is 463 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CST)
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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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
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
If you notice any errors in the below information, please contact our Webmaster
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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