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Hydrograph River at a Glance Download
North Branch Chicago River at Chicago (Grand Ave) Stage (ft)Observed: -2.86 ft at 3:10PM Aug 10, 2020Observed: -2.81 ft at 3:20PM Aug 10, 2020Observed: -2.86 ft at 3:30PM Aug 10, 2020Observed: -2.87 ft at 3:40PM Aug 10, 2020Observed: -2.88 ft at 3:50PM Aug 10, 2020Observed: -2.89 ft at 4:00PM Aug 10, 2020Observed: -2.9 ft at 4:10PM Aug 10, 2020Observed: -2.82 ft at 4:20PM Aug 10, 2020Observed: -2.76 ft at 4:30PM Aug 10, 2020Observed: -2.76 ft at 4:40PM Aug 10, 2020Observed: -2.76 ft at 4:50PM Aug 10, 2020Observed: -2.8 ft at 5:00PM Aug 10, 2020Observed: -2.83 ft at 5:10PM Aug 10, 2020Observed: -2.85 ft at 5:20PM Aug 10, 2020Observed: -2.84 ft at 5:30PM Aug 10, 2020Observed: -2.85 ft at 5:40PM Aug 10, 2020Observed: -2.85 ft at 5:50PM Aug 10, 2020Observed: -2.87 ft at 6:00PM Aug 10, 2020Observed: -2.87 ft at 6:10PM Aug 10, 2020Observed: -2.87 ft at 6:20PM Aug 10, 2020Observed: -2.86 ft at 6:30PM Aug 10, 2020Observed: -2.89 ft at 6:40PM Aug 10, 2020Observed: -2.94 ft at 6:50PM Aug 10, 2020Observed: -2.98 ft at 7:00PM Aug 10, 2020Observed: -3.01 ft at 7:10PM Aug 10, 2020Observed: -3.05 ft at 7:20PM Aug 10, 2020Observed: -3.08 ft at 7:30PM Aug 10, 2020Observed: -3.12 ft at 7:40PM Aug 10, 2020Observed: -3.13 ft at 7:50PM Aug 10, 2020Observed: -3.15 ft at 8:00PM Aug 10, 2020Observed: -3.16 ft at 8:10PM Aug 10, 2020Observed: -3.17 ft at 8:20PM Aug 10, 2020Observed: -3.2 ft at 8:30PM Aug 10, 2020Observed: -3.21 ft at 8:40PM Aug 10, 2020Observed: -3.21 ft at 8:50PM Aug 10, 2020Observed: -3.16 ft at 9:00PM Aug 10, 2020Observed: -3.23 ft at 9:10PM Aug 10, 2020Observed: -3.23 ft at 9:20PM Aug 10, 2020Observed: -3.22 ft at 9:30PM Aug 10, 2020Observed: -3.24 ft at 9:40PM Aug 10, 2020Observed: -3.22 ft at 9:50PM Aug 10, 2020Observed: -3.22 ft at 10:00PM Aug 10, 2020Observed: -3.22 ft at 10:10PM Aug 10, 2020Observed: -3.22 ft at 10:20PM Aug 10, 2020Observed: -3.21 ft at 10:30PM Aug 10, 2020Observed: -3.21 ft at 10:40PM Aug 10, 2020Observed: -3.21 ft at 10:50PM Aug 10, 2020Observed: -3.21 ft at 11:00PM Aug 10, 2020Observed: -3.22 ft at 11:10PM Aug 10, 2020Observed: -3.22 ft at 11:20PM Aug 10, 2020Observed: -3.21 ft at 11:30PM Aug 10, 2020Observed: -3.21 ft at 11:40PM Aug 10, 2020Observed: -3.21 ft at 11:50PM Aug 10, 2020Observed: -3.23 ft at 12:00AM Aug 11, 2020Observed: -3.24 ft at 12:10AM Aug 11, 2020Observed: -3.26 ft at 12:20AM Aug 11, 2020Observed: -3.25 ft at 12:30AM Aug 11, 2020Observed: -3.25 ft at 12:40AM Aug 11, 2020Observed: -3.26 ft at 12:50AM Aug 11, 2020Observed: -3.25 ft at 1:00AM Aug 11, 2020Observed: -3.27 ft at 1:10AM Aug 11, 2020Observed: -3.29 ft at 1:20AM Aug 11, 2020Observed: -3.32 ft at 1:30AM Aug 11, 2020Observed: -3.33 ft at 1:40AM Aug 11, 2020Observed: -3.34 ft at 1:50AM Aug 11, 2020Observed: -3.33 ft at 2:00AM Aug 11, 2020Observed: -3.33 ft at 2:10AM Aug 11, 2020Observed: -3.34 ft at 2:20AM Aug 11, 2020Observed: -3.35 ft at 2:30AM Aug 11, 2020Observed: -3.35 ft at 2:40AM Aug 11, 2020Observed: -3.33 ft at 2:50AM Aug 11, 2020Observed: -3.32 ft at 3:00AM Aug 11, 2020Observed: -3.3 ft at 3:10AM Aug 11, 2020Observed: -3.28 ft at 3:20AM Aug 11, 2020Observed: -3.26 ft at 3:30AM Aug 11, 2020Observed: -3.25 ft at 3:40AM Aug 11, 2020Observed: -3.23 ft at 3:50AM Aug 11, 2020Observed: -3.22 ft at 4:00AM Aug 11, 2020Observed: -3.21 ft at 4:10AM Aug 11, 2020Observed: -3.2 ft at 4:20AM Aug 11, 2020Observed: -3.21 ft at 4:30AM Aug 11, 2020Observed: -3.21 ft at 4:40AM Aug 11, 2020Observed: -3.2 ft at 4:50AM Aug 11, 2020Observed: -3.19 ft at 5:00AM Aug 11, 2020Observed: -3.2 ft at 5:10AM Aug 11, 2020Observed: -3.2 ft at 5:20AM Aug 11, 2020Observed: -3.21 ft at 5:30AM Aug 11, 2020Observed: -3.22 ft at 5:40AM Aug 11, 2020Observed: -3.22 ft at 5:50AM Aug 11, 2020Observed: -3.22 ft at 6:00AM Aug 11, 2020Observed: -3.21 ft at 6:10AM Aug 11, 2020Observed: -3.17 ft at 6:20AM Aug 11, 2020Observed: -3.14 ft at 6:30AM Aug 11, 2020Observed: -3.11 ft at 6:40AM Aug 11, 2020Observed: -3.09 ft at 6:50AM Aug 11, 2020Observed: -3.07 ft at 7:00AM Aug 11, 2020Observed: -3.06 ft at 7:10AM Aug 11, 2020Observed: -3.05 ft at 7:20AM Aug 11, 2020Observed: -3.03 ft at 7:30AM Aug 11, 2020Observed: -3.01 ft at 7:40AM Aug 11, 2020Observed: -2.98 ft at 7:50AM Aug 11, 2020Observed: -2.99 ft at 8:00AM Aug 11, 2020Observed: -2.99 ft at 8:10AM Aug 11, 2020Observed: -2.97 ft at 8:20AM Aug 11, 2020Observed: -2.96 ft at 8:30AM Aug 11, 2020Observed: -2.96 ft at 8:40AM Aug 11, 2020Observed: -2.95 ft at 8:50AM Aug 11, 2020Observed: -2.96 ft at 9:00AM Aug 11, 2020Observed: -2.94 ft at 9:10AM Aug 11, 2020Observed: -2.96 ft at 9:20AM Aug 11, 2020Observed: -2.97 ft at 9:30AM Aug 11, 2020Observed: -2.97 ft at 9:40AM Aug 11, 2020Observed: -2.9 ft at 9:50AM Aug 11, 2020Observed: -2.99 ft at 10:00AM Aug 11, 2020Observed: -2.97 ft at 10:10AM Aug 11, 2020Observed: -2.9 ft at 10:20AM Aug 11, 2020Observed: -2.92 ft at 10:30AM Aug 11, 2020Observed: -2.9 ft at 10:40AM Aug 11, 2020Observed: -2.87 ft at 10:50AM Aug 11, 2020Observed: -2.88 ft at 11:00AM Aug 11, 2020Observed: -2.84 ft at 11:10AM Aug 11, 2020Observed: -2.82 ft at 11:20AM Aug 11, 2020Observed: -2.85 ft at 11:30AM Aug 11, 2020Observed: -2.73 ft at 11:40AM Aug 11, 2020Observed: -2.77 ft at 11:50AM Aug 11, 2020Observed: -2.76 ft at 12:00PM Aug 11, 2020Observed: -2.75 ft at 12:10PM Aug 11, 2020Observed: -2.74 ft at 12:20PM Aug 11, 2020Observed: -2.66 ft at 12:30PM Aug 11, 2020Observed: -2.7 ft at 12:40PM Aug 11, 2020Observed: -2.69 ft at 12:50PM Aug 11, 2020Observed: -2.67 ft at 1:00PM Aug 11, 2020Observed: -2.64 ft at 1:10PM Aug 11, 2020Observed: -2.65 ft at 1:20PM Aug 11, 2020Observed: -2.64 ft at 1:30PM Aug 11, 2020Observed: -2.58 ft at 1:40PM Aug 11, 2020Observed: -2.57 ft at 1:50PM Aug 11, 2020Observed: -2.59 ft at 2:00PM Aug 11, 2020Observed: -2.53 ft at 2:10PM Aug 11, 2020Observed: -2.57 ft at 2:20PM Aug 11, 2020Observed: -2.57 ft at 2:30PM Aug 11, 2020Observed: -2.53 ft at 2:40PM Aug 11, 2020Observed: -2.57 ft at 2:50PM Aug 11, 2020Observed: -2.59 ft at 3:00PM Aug 11, 2020Observed: -2.55 ft at 3:10PM Aug 11, 2020Observed: -2.53 ft at 3:20PM Aug 11, 2020Observed: -2.44 ft at 3:30PM Aug 11, 2020Observed: -2.47 ft at 3:40PM Aug 11, 2020Observed: -2.48 ft at 3:50PM Aug 11, 2020Observed: -2.45 ft at 4:00PM Aug 11, 2020Observed: -2.46 ft at 4:10PM Aug 11, 2020Observed: -2.49 ft at 4:20PM Aug 11, 2020Observed: -2.48 ft at 4:30PM Aug 11, 2020Observed: -2.41 ft at 4:40PM Aug 11, 2020Observed: -2.42 ft at 4:50PM Aug 11, 2020Observed: -2.41 ft at 5:00PM Aug 11, 2020Observed: -2.35 ft at 5:10PM Aug 11, 2020Observed: -2.34 ft at 5:20PM Aug 11, 2020Observed: -2.33 ft at 5:30PM Aug 11, 2020Observed: -2.3 ft at 5:40PM Aug 11, 2020Observed: -2.26 ft at 5:50PM Aug 11, 2020Observed: -2.21 ft at 6:00PM Aug 11, 2020Observed: -2.24 ft at 6:10PM Aug 11, 2020Observed: -2.25 ft at 6:20PM Aug 11, 2020Observed: -2.21 ft at 6:30PM Aug 11, 2020Observed: -2.16 ft at 6:40PM Aug 11, 2020Observed: -2.23 ft at 6:50PM Aug 11, 2020Observed: -2.28 ft at 7:00PM Aug 11, 2020Observed: -2.26 ft at 7:10PM Aug 11, 2020Observed: -2.22 ft at 7:20PM Aug 11, 2020Observed: -2.22 ft at 7:30PM Aug 11, 2020Observed: -2.22 ft at 7:40PM Aug 11, 2020Observed: -2.16 ft at 7:50PM Aug 11, 2020Observed: -2.15 ft at 8:00PM Aug 11, 2020Observed: -2.16 ft at 8:10PM Aug 11, 2020Observed: -2.2 ft at 8:20PM Aug 11, 2020Observed: -2.15 ft at 8:30PM Aug 11, 2020Observed: -2.22 ft at 8:40PM Aug 11, 2020Observed: -2.18 ft at 8:50PM Aug 11, 2020Observed: -2.12 ft at 9:00PM Aug 11, 2020Observed: -2.12 ft at 9:10PM Aug 11, 2020Observed: -2.12 ft at 9:20PM Aug 11, 2020Observed: -2.08 ft at 9:30PM Aug 11, 2020Observed: -2.08 ft at 9:40PM Aug 11, 2020Observed: -2.07 ft at 9:50PM Aug 11, 2020Observed: -2.06 ft at 10:00PM Aug 11, 2020Observed: -2.05 ft at 10:10PM Aug 11, 2020Observed: -2.04 ft at 10:20PM Aug 11, 2020Observed: -2.02 ft at 10:30PM Aug 11, 2020Observed: -1.95 ft at 10:40PM Aug 11, 2020Observed: -2.01 ft at 10:50PM Aug 11, 2020Observed: -2.02 ft at 11:00PM Aug 11, 2020Observed: -2 ft at 11:10PM Aug 11, 2020Observed: -2.01 ft at 11:20PM Aug 11, 2020Observed: -2.01 ft at 11:30PM Aug 11, 2020Observed: -2.02 ft at 11:40PM Aug 11, 2020Observed: -2 ft at 11:50PM Aug 11, 2020Observed: -2 ft at 12:00AM Aug 12, 2020Observed: -2.01 ft at 12:10AM Aug 12, 2020Observed: -2.03 ft at 12:20AM Aug 12, 2020Observed: -2.03 ft at 12:30AM Aug 12, 2020Observed: -2.02 ft at 12:40AM Aug 12, 2020Observed: -2.02 ft at 12:50AM Aug 12, 2020Observed: -2 ft at 1:00AM Aug 12, 2020Observed: -1.99 ft at 1:10AM Aug 12, 2020Observed: -1.99 ft at 1:20AM Aug 12, 2020Observed: -2 ft at 1:30AM Aug 12, 2020Observed: -1.99 ft at 1:40AM Aug 12, 2020Observed: -1.99 ft at 1:50AM Aug 12, 2020Observed: -1.98 ft at 2:00AM Aug 12, 2020Observed: -1.97 ft at 2:10AM Aug 12, 2020Observed: -1.95 ft at 2:20AM Aug 12, 2020Observed: -1.94 ft at 2:30AM Aug 12, 2020Observed: -1.95 ft at 2:40AM Aug 12, 2020Observed: -1.97 ft at 2:50AM Aug 12, 2020Observed: -2 ft at 3:00AM Aug 12, 2020Observed: -2.01 ft at 3:10AM Aug 12, 2020Observed: -2 ft at 3:20AM Aug 12, 2020Observed: -1.97 ft at 3:30AM Aug 12, 2020Observed: -1.96 ft at 3:40AM Aug 12, 2020Observed: -1.95 ft at 3:50AM Aug 12, 2020Observed: -1.95 ft at 4:00AM Aug 12, 2020Observed: -1.95 ft at 4:10AM Aug 12, 2020Observed: -1.94 ft at 4:20AM Aug 12, 2020Observed: -1.93 ft at 4:30AM Aug 12, 2020Observed: -1.92 ft at 4:40AM Aug 12, 2020Observed: -1.91 ft at 4:50AM Aug 12, 2020Observed: -1.9 ft at 5:00AM Aug 12, 2020Observed: -1.9 ft at 5:10AM Aug 12, 2020Observed: -1.9 ft at 5:20AM Aug 12, 2020Observed: -1.9 ft at 5:30AM Aug 12, 2020Observed: -1.88 ft at 5:40AM Aug 12, 2020Observed: -1.88 ft at 5:50AM Aug 12, 2020Observed: -1.89 ft at 6:00AM Aug 12, 2020Observed: -1.83 ft at 6:10AM Aug 12, 2020Observed: -1.89 ft at 6:20AM Aug 12, 2020Observed: -1.89 ft at 6:30AM Aug 12, 2020Observed: -1.9 ft at 6:40AM Aug 12, 2020Observed: -1.88 ft at 6:50AM Aug 12, 2020Observed: -1.88 ft at 7:00AM Aug 12, 2020Observed: -1.87 ft at 7:10AM Aug 12, 2020Observed: -1.88 ft at 7:20AM Aug 12, 2020Observed: -1.88 ft at 7:30AM Aug 12, 2020Observed: -1.9 ft at 7:40AM Aug 12, 2020Observed: -1.89 ft at 7:50AM Aug 12, 2020Observed: -1.9 ft at 8:00AM Aug 12, 2020Observed: -1.89 ft at 8:10AM Aug 12, 2020Observed: -1.9 ft at 8:20AM Aug 12, 2020Observed: -1.72 ft at 8:30AM Aug 12, 2020Observed: -1.88 ft at 8:40AM Aug 12, 2020Observed: -1.93 ft at 8:50AM Aug 12, 2020Observed: -1.88 ft at 9:00AM Aug 12, 2020Observed: -1.93 ft at 9:10AM Aug 12, 2020Observed: -1.94 ft at 9:20AM Aug 12, 2020Observed: -1.96 ft at 9:30AM Aug 12, 2020Observed: -1.95 ft at 9:40AM Aug 12, 2020Observed: -1.93 ft at 9:50AM Aug 12, 2020Observed: -1.96 ft at 10:00AM Aug 12, 2020Observed: -2 ft at 10:10AM Aug 12, 2020Observed: -1.93 ft at 10:20AM Aug 12, 2020Observed: -2 ft at 10:30AM Aug 12, 2020Observed: -2 ft at 10:40AM Aug 12, 2020Observed: -1.96 ft at 10:50AM Aug 12, 2020Observed: -1.96 ft at 11:00AM Aug 12, 2020Observed: -1.97 ft at 11:10AM Aug 12, 2020Observed: -1.96 ft at 11:20AM Aug 12, 2020Observed: -1.98 ft at 11:30AM Aug 12, 2020Observed: -2 ft at 11:40AM Aug 12, 2020Observed: -1.95 ft at 11:50AM Aug 12, 2020Observed: -1.97 ft at 12:00PM Aug 12, 2020Observed: -1.98 ft at 12:10PM Aug 12, 2020Observed: -1.94 ft at 12:20PM Aug 12, 2020Observed: -1.96 ft at 12:30PM Aug 12, 2020Observed: -1.96 ft at 12:40PM Aug 12, 2020Observed: -1.93 ft at 12:50PM Aug 12, 2020Observed: -1.97 ft at 1:00PM Aug 12, 2020Observed: -1.96 ft at 1:10PM Aug 12, 2020Observed: -1.91 ft at 1:20PM Aug 12, 2020Observed: -1.98 ft at 1:30PM Aug 12, 2020Observed: -1.93 ft at 1:40PM Aug 12, 2020Observed: -2 ft at 1:50PM Aug 12, 2020Observed: -2.01 ft at 2:00PM Aug 12, 2020Observed: -2.04 ft at 2:10PM Aug 12, 2020Observed: -2.03 ft at 2:20PM Aug 12, 2020Observed: -2.06 ft at 2:30PM Aug 12, 2020Observed: -1.98 ft at 2:40PM Aug 12, 2020Observed: -2.06 ft at 2:50PM Aug 12, 2020Observed: -2.07 ft at 3:00PM Aug 12, 2020Observed: -2.08 ft at 3:10PM Aug 12, 2020Observed: -2 ft at 3:20PM Aug 12, 2020Observed: -2.07 ft at 3:30PM Aug 12, 2020Observed: -2.06 ft at 3:40PM Aug 12, 2020Observed: -2.02 ft at 3:50PM Aug 12, 2020Observed: -2.04 ft at 4:00PM Aug 12, 2020Observed: -2.08 ft at 4:10PM Aug 12, 2020Observed: -2.07 ft at 4:20PM Aug 12, 2020Observed: -1.98 ft at 4:30PM Aug 12, 2020Observed: -2.02 ft at 4:40PM Aug 12, 2020Observed: -2.05 ft at 4:50PM Aug 12, 2020Observed: -2.06 ft at 5:00PM Aug 12, 2020Observed: -1.97 ft at 5:10PM Aug 12, 2020Observed: -2.04 ft at 5:20PM Aug 12, 2020Observed: -2.09 ft at 5:30PM Aug 12, 2020Observed: -2.09 ft at 5:40PM Aug 12, 2020Observed: -1.98 ft at 5:50PM Aug 12, 2020Observed: -2.1 ft at 6:00PM Aug 12, 2020Observed: -2.08 ft at 6:10PM Aug 12, 2020Observed: -2.04 ft at 6:20PM Aug 12, 2020Observed: -2.06 ft at 6:30PM Aug 12, 2020Observed: -2.05 ft at 6:40PM Aug 12, 2020Observed: -2.11 ft at 6:50PM Aug 12, 2020Observed: -2.06 ft at 7:00PM Aug 12, 2020Observed: -2.14 ft at 7:10PM Aug 12, 2020Observed: -2.13 ft at 7:20PM Aug 12, 2020Observed: -2.16 ft at 7:30PM Aug 12, 2020Observed: -2.07 ft at 7:40PM Aug 12, 2020Observed: -2.19 ft at 7:50PM Aug 12, 2020Observed: -2.11 ft at 8:00PM Aug 12, 2020Observed: -2.12 ft at 8:10PM Aug 12, 2020Observed: -2.04 ft at 8:20PM Aug 12, 2020Observed: -2.11 ft at 8:30PM Aug 12, 2020Observed: -2.08 ft at 8:40PM Aug 12, 2020Observed: -2.05 ft at 8:50PM Aug 12, 2020Observed: -2.01 ft at 9:00PM Aug 12, 2020Observed: -2.07 ft at 9:10PM Aug 12, 2020Observed: -2.07 ft at 9:20PM Aug 12, 2020Observed: -2.01 ft at 9:30PM Aug 12, 2020Observed: -2.03 ft at 9:40PM Aug 12, 2020Observed: -2.03 ft at 9:50PM Aug 12, 2020Observed: -2.05 ft at 10:00PM Aug 12, 2020Observed: -1.97 ft at 10:10PM Aug 12, 2020Observed: -2.05 ft at 10:20PM Aug 12, 2020Observed: -2.03 ft at 10:30PM Aug 12, 2020Observed: -2.06 ft at 10:40PM Aug 12, 2020Observed: -1.98 ft at 10:50PM Aug 12, 2020Observed: -2.03 ft at 11:00PM Aug 12, 2020Observed: -2.05 ft at 11:10PM Aug 12, 2020Observed: -2.05 ft at 11:20PM Aug 12, 2020Observed: -2.03 ft at 11:30PM Aug 12, 2020Observed: -1.97 ft at 11:40PM Aug 12, 2020Observed: -2.04 ft at 11:50PM Aug 12, 2020Observed: -2.03 ft at 12:00AM Aug 13, 2020Observed: -2.02 ft at 12:10AM Aug 13, 2020Observed: -2.02 ft at 12:20AM Aug 13, 2020Observed: -2.02 ft at 12:30AM Aug 13, 2020Observed: -2.04 ft at 12:40AM Aug 13, 2020Observed: -2.03 ft at 12:50AM Aug 13, 2020Observed: -2.04 ft at 1:00AM Aug 13, 2020Observed: -2.03 ft at 1:10AM Aug 13, 2020Observed: -2.03 ft at 1:20AM Aug 13, 2020Observed: -2.04 ft at 1:30AM Aug 13, 2020Observed: -2.04 ft at 1:40AM Aug 13, 2020Observed: -2.04 ft at 1:50AM Aug 13, 2020Observed: -2.04 ft at 2:00AM Aug 13, 2020Observed: -2.04 ft at 2:10AM Aug 13, 2020Observed: -2.04 ft at 2:20AM Aug 13, 2020Observed: -2.04 ft at 2:30AM Aug 13, 2020Observed: -2.03 ft at 2:40AM Aug 13, 2020Observed: -2.05 ft at 2:50AM Aug 13, 2020Observed: -2.04 ft at 3:00AM Aug 13, 2020Observed: -2.04 ft at 3:10AM Aug 13, 2020Observed: -2.05 ft at 3:20AM Aug 13, 2020Observed: -2.04 ft at 3:30AM Aug 13, 2020Observed: -2.04 ft at 3:40AM Aug 13, 2020Observed: -2.03 ft at 3:50AM Aug 13, 2020Observed: -2.04 ft at 4:00AM Aug 13, 2020Observed: -2.06 ft at 4:10AM Aug 13, 2020Observed: -2.1 ft at 4:20AM Aug 13, 2020Observed: -2.1 ft at 4:30AM Aug 13, 2020Observed: -2.13 ft at 4:40AM Aug 13, 2020Observed: -2.1 ft at 4:50AM Aug 13, 2020Observed: -2.1 ft at 5:00AM Aug 13, 2020Observed: -2.11 ft at 5:10AM Aug 13, 2020Observed: -2.11 ft at 5:20AM Aug 13, 2020Observed: -2.12 ft at 5:30AM Aug 13, 2020Observed: -2.11 ft at 5:40AM Aug 13, 2020Observed: -2.11 ft at 5:50AM Aug 13, 2020Observed: -2.11 ft at 6:00AM Aug 13, 2020Observed: -2.1 ft at 6:10AM Aug 13, 2020Observed: -2.11 ft at 6:20AM Aug 13, 2020Observed: -2.12 ft at 6:30AM Aug 13, 2020Observed: -2.11 ft at 6:40AM Aug 13, 2020Observed: -2.13 ft at 6:50AM Aug 13, 2020Observed: -2.22 ft at 7:00AM Aug 13, 2020Observed: -2.14 ft at 7:10AM Aug 13, 2020Observed: -2.15 ft at 7:20AM Aug 13, 2020Observed: -2.15 ft at 7:30AM Aug 13, 2020Observed: -2.18 ft at 7:40AM Aug 13, 2020Observed: -2.18 ft at 7:50AM Aug 13, 2020Observed: -2.15 ft at 8:00AM Aug 13, 2020Observed: -2.18 ft at 8:10AM Aug 13, 2020Observed: -2.18 ft at 8:20AM Aug 13, 2020Observed: -2.19 ft at 8:30AM Aug 13, 2020Observed: -2.2 ft at 8:40AM Aug 13, 2020Observed: -2.19 ft at 8:50AM Aug 13, 2020Observed: -2.21 ft at 9:00AM Aug 13, 2020Observed: -2.14 ft at 9:10AM Aug 13, 2020Observed: -2.22 ft at 9:20AM Aug 13, 2020Observed: -2.22 ft at 9:30AM Aug 13, 2020Observed: -2.23 ft at 9:40AM Aug 13, 2020Observed: -2.17 ft at 9:50AM Aug 13, 2020Observed: -2.23 ft at 10:00AM Aug 13, 2020Observed: -2.26 ft at 10:10AM Aug 13, 2020Observed: -2.22 ft at 10:20AM Aug 13, 2020Observed: -2.26 ft at 10:30AM Aug 13, 2020Observed: -2.2 ft at 10:40AM Aug 13, 2020Observed: -2.29 ft at 10:50AM Aug 13, 2020Observed: -2.28 ft at 11:00AM Aug 13, 2020Observed: -2.25 ft at 11:10AM Aug 13, 2020Observed: -2.28 ft at 11:20AM Aug 13, 2020Observed: -2.29 ft at 11:30AM Aug 13, 2020Observed: -2.32 ft at 11:40AM Aug 13, 2020Observed: -2.26 ft at 11:50AM Aug 13, 2020Observed: -2.32 ft at 12:00PM Aug 13, 2020Observed: -2.34 ft at 12:10PM Aug 13, 2020Observed: -2.26 ft at 12:20PM Aug 13, 2020Observed: -2.33 ft at 12:30PM Aug 13, 2020Observed: -2.35 ft at 12:40PM Aug 13, 2020Observed: -2.32 ft at 12:50PM Aug 13, 2020Observed: -2.35 ft at 1:00PM Aug 13, 2020Observed: -2.38 ft at 1:10PM Aug 13, 2020Observed: -2.34 ft at 1:20PM Aug 13, 2020Observed: -2.4 ft at 1:30PM Aug 13, 2020Observed: -2.38 ft at 1:40PM Aug 13, 2020Observed: -2.33 ft at 1:50PM Aug 13, 2020Observed: -2.35 ft at 2:00PM Aug 13, 2020Observed: -2.38 ft at 2:10PM Aug 13, 2020Observed: -2.34 ft at 2:20PM Aug 13, 2020Observed: -2.4 ft at 2:30PM Aug 13, 2020Observed: -2.38 ft at 2:40PM Aug 13, 2020Observed: -2.36 ft at 2:50PM Aug 13, 2020Observed: -2.33 ft at 3:00PM Aug 13, 2020Observed: -2.37 ft at 3:10PM Aug 13, 2020Observed: -2.37 ft at 3:20PM Aug 13, 2020Observed: -2.37 ft at 3:30PM Aug 13, 2020Observed: -2.29 ft at 3:40PM Aug 13, 2020Observed: -2.34 ft at 3:50PM Aug 13, 2020Observed: -2.33 ft at 4:00PM Aug 13, 2020Observed: -2.32 ft at 4:10PM Aug 13, 2020Observed: -2.27 ft at 4:20PM Aug 13, 2020Observed: -2.3 ft at 4:30PM Aug 13, 2020Observed: -2.33 ft at 4:40PM Aug 13, 2020Observed: -2.35 ft at 4:50PM Aug 13, 2020Observed: -2.34 ft at 5:00PM Aug 13, 2020Observed: -2.38 ft at 5:10PM Aug 13, 2020Observed: -2.36 ft at 5:20PM Aug 13, 2020Observed: -2.3 ft at 5:30PM Aug 13, 2020Observed: -2.29 ft at 5:40PM Aug 13, 2020Observed: -2.29 ft at 5:50PM Aug 13, 2020Observed: -2.31 ft at 6:00PM Aug 13, 2020Observed: -2.26 ft at 6:10PM Aug 13, 2020Observed: -2.27 ft at 6:20PM Aug 13, 2020Observed: -2.31 ft at 6:30PM Aug 13, 2020Observed: -2.38 ft at 6:40PM Aug 13, 2020Observed: -2.34 ft at 6:50PM Aug 13, 2020Observed: -2.33 ft at 7:00PM Aug 13, 2020Observed: -2.34 ft at 7:10PM Aug 13, 2020Observed: -2.33 ft at 7:20PM Aug 13, 2020Observed: -2.24 ft at 7:30PM Aug 13, 2020Observed: -2.27 ft at 7:40PM Aug 13, 2020Observed: -2.27 ft at 7:50PM Aug 13, 2020Observed: -2.29 ft at 8:00PM Aug 13, 2020Observed: -2.21 ft at 8:10PM Aug 13, 2020Observed: -2.2 ft at 8:20PM Aug 13, 2020Observed: -2.21 ft at 8:30PM Aug 13, 2020Observed: -2.2 ft at 8:40PM Aug 13, 2020Observed: -2.1 ft at 8:50PM Aug 13, 2020Observed: -2.17 ft at 9:00PM Aug 13, 2020Observed: -2.17 ft at 9:10PM Aug 13, 2020Observed: -2.13 ft at 9:20PM Aug 13, 2020Observed: -2.08 ft at 9:30PM Aug 13, 2020Observed: -2.14 ft at 9:40PM Aug 13, 2020Observed: -2.14 ft at 9:50PM Aug 13, 2020Observed: -2.13 ft at 10:00PM Aug 13, 2020Observed: -2.08 ft at 10:10PM Aug 13, 2020Observed: -2.13 ft at 10:20PM Aug 13, 2020Observed: -2.14 ft at 10:30PM Aug 13, 2020Observed: -2.1 ft at 10:40PM Aug 13, 2020Observed: -2.1 ft at 10:50PM Aug 13, 2020Observed: -2.15 ft at 11:00PM Aug 13, 2020Observed: -2.09 ft at 11:10PM Aug 13, 2020Observed: -2.1 ft at 11:20PM Aug 13, 2020Observed: -2.12 ft at 11:30PM Aug 13, 2020Observed: -2.11 ft at 11:40PM Aug 13, 2020Observed: -2.05 ft at 11:50PM Aug 13, 2020Observed: -2.07 ft at 12:00AM Aug 14, 2020Observed: -2.09 ft at 12:10AM Aug 14, 2020Observed: -2.01 ft at 12:20AM Aug 14, 2020Observed: -2.1 ft at 12:30AM Aug 14, 2020Observed: -2.07 ft at 12:40AM Aug 14, 2020Observed: -2.09 ft at 12:50AM Aug 14, 2020Observed: -1.98 ft at 1:00AM Aug 14, 2020Observed: -2.08 ft at 1:10AM Aug 14, 2020Observed: -2.05 ft at 1:20AM Aug 14, 2020Observed: -2.06 ft at 1:30AM Aug 14, 2020Observed: -2.02 ft at 1:40AM Aug 14, 2020Observed: -2.03 ft at 1:50AM Aug 14, 2020Observed: -2.02 ft at 2:00AM Aug 14, 2020Observed: -2.04 ft at 2:10AM Aug 14, 2020Observed: -2.05 ft at 2:20AM Aug 14, 2020Observed: -2.09 ft at 2:30AM Aug 14, 2020Observed: -2.12 ft at 2:40AM Aug 14, 2020Observed: -2.14 ft at 2:50AM Aug 14, 2020Observed: -2.11 ft at 3:00AM Aug 14, 2020Observed: -2.1 ft at 3:10AM Aug 14, 2020Observed: -2.08 ft at 3:20AM Aug 14, 2020Observed: -2.06 ft at 3:30AM Aug 14, 2020Observed: -2.07 ft at 3:40AM Aug 14, 2020Observed: -2.1 ft at 3:50AM Aug 14, 2020Observed: -2.14 ft at 4:00AM Aug 14, 2020Observed: -2.16 ft at 4:10AM Aug 14, 2020Observed: -2.15 ft at 4:20AM Aug 14, 2020Observed: -2.13 ft at 4:30AM Aug 14, 2020Observed: -2.09 ft at 4:40AM Aug 14, 2020Observed: -2.09 ft at 4:50AM Aug 14, 2020Observed: -2.08 ft at 5:00AM Aug 14, 2020Observed: -2.07 ft at 5:10AM Aug 14, 2020Observed: -2.06 ft at 5:20AM Aug 14, 2020Observed: -2.08 ft at 5:30AM Aug 14, 2020Observed: -2.11 ft at 5:40AM Aug 14, 2020Observed: -2.12 ft at 5:50AM Aug 14, 2020Observed: -2.12 ft at 6:00AM Aug 14, 2020Observed: -2.1 ft at 6:10AM Aug 14, 2020Observed: -2.08 ft at 6:20AM Aug 14, 2020Observed: -2.05 ft at 6:30AM Aug 14, 2020Observed: -2.05 ft at 6:40AM Aug 14, 2020Observed: -2.05 ft at 6:50AM Aug 14, 2020Observed: -2.04 ft at 7:00AM Aug 14, 2020Observed: -2.02 ft at 7:10AM Aug 14, 2020Observed: -2.01 ft at 7:20AM Aug 14, 2020Observed: -1.99 ft at 7:30AM Aug 14, 2020Observed: -1.99 ft at 7:40AM Aug 14, 2020Observed: -1.99 ft at 7:50AM Aug 14, 2020Observed: -1.97 ft at 8:00AM Aug 14, 2020Observed: -2.01 ft at 8:10AM Aug 14, 2020Observed: -2 ft at 8:20AM Aug 14, 2020Observed: -1.97 ft at 8:30AM Aug 14, 2020Observed: -1.94 ft at 8:40AM Aug 14, 2020Observed: -1.98 ft at 8:50AM Aug 14, 2020Observed: -1.99 ft at 9:00AM Aug 14, 2020Observed: -1.98 ft at 9:10AM Aug 14, 2020Observed: -1.99 ft at 9:20AM Aug 14, 2020Observed: -1.95 ft at 9:30AM Aug 14, 2020Observed: -2 ft at 9:40AM Aug 14, 2020Observed: -2 ft at 9:50AM Aug 14, 2020Observed: -1.95 ft at 10:00AM Aug 14, 2020Observed: -2 ft at 10:10AM Aug 14, 2020Observed: -1.98 ft at 10:20AM Aug 14, 2020Observed: -1.97 ft at 10:30AM Aug 14, 2020Observed: -1.91 ft at 10:40AM Aug 14, 2020Observed: -1.94 ft at 10:50AM Aug 14, 2020Observed: -1.93 ft at 11:00AM Aug 14, 2020Observed: -1.91 ft at 11:10AM Aug 14, 2020Observed: -1.92 ft at 11:20AM Aug 14, 2020Observed: -1.95 ft at 11:30AM Aug 14, 2020Observed: -1.93 ft at 11:40AM Aug 14, 2020Observed: -1.91 ft at 11:50AM Aug 14, 2020Observed: -1.92 ft at 12:00PM Aug 14, 2020Observed: -1.91 ft at 12:10PM Aug 14, 2020Observed: -1.89 ft at 12:20PM Aug 14, 2020Observed: -1.92 ft at 12:30PM Aug 14, 2020Observed: -1.98 ft at 12:40PM Aug 14, 2020Observed: -1.98 ft at 12:50PM Aug 14, 2020Observed: -2.01 ft at 1:00PM Aug 14, 2020Observed: -2.01 ft at 1:10PM Aug 14, 2020Observed: -1.99 ft at 1:20PM Aug 14, 2020Observed: -1.94 ft at 1:30PM Aug 14, 2020Observed: -1.93 ft at 1:40PM Aug 14, 2020Observed: -1.96 ft at 1:50PM Aug 14, 2020Observed: -1.95 ft at 2:00PM Aug 14, 2020Observed: -1.92 ft at 2:10PM Aug 14, 2020Observed: -1.93 ft at 2:20PM Aug 14, 2020Observed: -1.96 ft at 2:30PM Aug 14, 2020Observed: -1.91 ft at 2:40PM Aug 14, 2020Observed: -2.01 ft at 2:50PM Aug 14, 2020Observed: -2.03 ft at 3:00PM Aug 14, 2020Observed: -2.04 ft at 3:10PM Aug 14, 2020Observed: -1.94 ft at 3:20PM Aug 14, 2020Observed: -1.92 ft at 3:30PM Aug 14, 2020Observed: -1.96 ft at 3:40PM Aug 14, 2020Observed: -1.96 ft at 3:50PM Aug 14, 2020Observed: -1.9 ft at 4:00PM Aug 14, 2020Observed: -1.93 ft at 4:10PM Aug 14, 2020Observed: -1.93 ft at 4:20PM Aug 14, 2020Observed: -1.87 ft at 4:30PM Aug 14, 2020Observed: -1.84 ft at 4:40PM Aug 14, 2020Observed: -1.86 ft at 4:50PM Aug 14, 2020Observed: -1.9 ft at 5:00PM Aug 14, 2020Observed: -1.84 ft at 5:10PM Aug 14, 2020Observed: -1.87 ft at 5:20PM Aug 14, 2020Observed: -1.89 ft at 5:30PM Aug 14, 2020Observed: -1.85 ft at 5:40PM Aug 14, 2020Observed: -1.87 ft at 5:50PM Aug 14, 2020Observed: -1.91 ft at 6:00PM Aug 14, 2020Observed: -1.94 ft at 6:10PM Aug 14, 2020Observed: -1.9 ft at 6:20PM Aug 14, 2020Observed: -1.93 ft at 6:30PM Aug 14, 2020Observed: -1.94 ft at 6:40PM Aug 14, 2020Observed: -1.86 ft at 6:50PM Aug 14, 2020Observed: -1.92 ft at 7:00PM Aug 14, 2020Observed: -1.94 ft at 7:10PM Aug 14, 2020Observed: -1.93 ft at 7:20PM Aug 14, 2020Observed: -1.86 ft at 7:30PM Aug 14, 2020Observed: -1.92 ft at 7:40PM Aug 14, 2020Observed: -1.92 ft at 7:50PM Aug 14, 2020Observed: -1.89 ft at 8:00PM Aug 14, 2020Observed: -1.85 ft at 8:10PM Aug 14, 2020Observed: -1.89 ft at 8:20PM Aug 14, 2020Observed: -1.88 ft at 8:30PM Aug 14, 2020Observed: -1.87 ft at 8:40PM Aug 14, 2020Observed: -1.8 ft at 8:50PM Aug 14, 2020Observed: -1.92 ft at 9:00PM Aug 14, 2020Observed: -1.86 ft at 9:10PM Aug 14, 2020Observed: -1.87 ft at 9:20PM Aug 14, 2020Observed: -1.78 ft at 9:30PM Aug 14, 2020Observed: -1.86 ft at 9:40PM Aug 14, 2020Observed: -1.9 ft at 9:50PM Aug 14, 2020Observed: -1.92 ft at 10:00PM Aug 14, 2020Observed: -1.93 ft at 10:10PM Aug 14, 2020Observed: -1.97 ft at 10:20PM Aug 14, 2020Observed: -1.96 ft at 10:30PM Aug 14, 2020Observed: -1.93 ft at 10:40PM Aug 14, 2020Observed: -1.93 ft at 10:50PM Aug 14, 2020Observed: -1.94 ft at 11:00PM Aug 14, 2020Observed: -1.9 ft at 11:10PM Aug 14, 2020Observed: -1.93 ft at 11:20PM Aug 14, 2020Observed: -1.93 ft at 11:30PM Aug 14, 2020Observed: -1.93 ft at 11:40PM Aug 14, 2020Observed: -1.96 ft at 11:50PM Aug 14, 2020Observed: -1.89 ft at 12:00AM Aug 15, 2020Observed: -1.89 ft at 12:10AM Aug 15, 2020Observed: -1.81 ft at 12:20AM Aug 15, 2020Observed: -1.89 ft at 12:30AM Aug 15, 2020Observed: -1.83 ft at 12:40AM Aug 15, 2020Observed: -1.98 ft at 12:50AM Aug 15, 2020Observed: -1.99 ft at 1:00AM Aug 15, 2020Observed: -2.02 ft at 1:10AM Aug 15, 2020Observed: -1.96 ft at 1:20AM Aug 15, 2020Observed: -1.97 ft at 1:30AM Aug 15, 2020Observed: -1.92 ft at 1:40AM Aug 15, 2020Observed: -1.99 ft at 1:50AM Aug 15, 2020Observed: -2.01 ft at 2:00AM Aug 15, 2020Observed: -2.05 ft at 2:10AM Aug 15, 2020Observed: -2.06 ft at 2:20AM Aug 15, 2020Observed: -2.03 ft at 2:30AM Aug 15, 2020Observed: -2 ft at 2:40AM Aug 15, 2020Observed: -1.98 ft at 2:50AM Aug 15, 2020Observed: -1.98 ft at 3:00AM Aug 15, 2020Observed: -1.99 ft at 3:10AM Aug 15, 2020Observed: -1.99 ft at 3:20AM Aug 15, 2020Observed: -1.97 ft at 3:30AM Aug 15, 2020Observed: -1.98 ft at 3:40AM Aug 15, 2020Observed: -2.02 ft at 3:50AM Aug 15, 2020Observed: -2.04 ft at 4:00AM Aug 15, 2020Observed: -2.07 ft at 4:10AM Aug 15, 2020Observed: -2.04 ft at 4:20AM Aug 15, 2020Observed: -2.03 ft at 4:30AM Aug 15, 2020Observed: -2.03 ft at 4:40AM Aug 15, 2020Observed: -2.02 ft at 4:50AM Aug 15, 2020Observed: -2.03 ft at 5:00AM Aug 15, 2020Observed: -2.03 ft at 5:10AM Aug 15, 2020Observed: -2.03 ft at 5:20AM Aug 15, 2020Observed: -2.02 ft at 5:30AM Aug 15, 2020Observed: -2.01 ft at 5:40AM Aug 15, 2020Observed: -2 ft at 5:50AM Aug 15, 2020Observed: -2 ft at 6:00AM Aug 15, 2020Observed: -2 ft at 6:10AM Aug 15, 2020Observed: -2.02 ft at 6:20AM Aug 15, 2020Observed: -2.02 ft at 6:30AM Aug 15, 2020Observed: -2.01 ft at 6:40AM Aug 15, 2020Observed: -2.02 ft at 6:50AM Aug 15, 2020Observed: -2.01 ft at 7:00AM Aug 15, 2020Observed: -2.03 ft at 7:10AM Aug 15, 2020Observed: -2.03 ft at 7:20AM Aug 15, 2020Observed: -2.04 ft at 7:30AM Aug 15, 2020Observed: -1.99 ft at 7:40AM Aug 15, 2020Observed: -2.02 ft at 7:50AM Aug 15, 2020Observed: -2.03 ft at 8:00AM Aug 15, 2020Observed: -2.04 ft at 8:10AM Aug 15, 2020Observed: -1.98 ft at 8:20AM Aug 15, 2020Observed: -2.05 ft at 8:30AM Aug 15, 2020Observed: -2.04 ft at 8:40AM Aug 15, 2020Observed: -2.05 ft at 8:50AM Aug 15, 2020Observed: -1.99 ft at 9:00AM Aug 15, 2020Observed: -2.02 ft at 9:10AM Aug 15, 2020Observed: -2.04 ft at 9:20AM Aug 15, 2020Observed: -2.01 ft at 9:30AM Aug 15, 2020Observed: -2.03 ft at 9:40AM Aug 15, 2020Observed: -2.01 ft at 9:50AM Aug 15, 2020Observed: -2.01 ft at 10:00AM Aug 15, 2020Observed: -2.04 ft at 10:10AM Aug 15, 2020Observed: -2.04 ft at 10:20AM Aug 15, 2020Observed: -2 ft at 10:30AM Aug 15, 2020Observed: -2.04 ft at 10:40AM Aug 15, 2020Observed: -2.04 ft at 10:50AM Aug 15, 2020Observed: -2.01 ft at 11:00AM Aug 15, 2020Observed: -2.01 ft at 11:10AM Aug 15, 2020Observed: -2.04 ft at 11:20AM Aug 15, 2020Observed: -2.03 ft at 11:30AM Aug 15, 2020Observed: -1.99 ft at 11:40AM Aug 15, 2020Observed: -2.04 ft at 11:50AM Aug 15, 2020Observed: -2.04 ft at 12:00PM Aug 15, 2020Observed: -2.05 ft at 12:10PM Aug 15, 2020Observed: -2.03 ft at 12:20PM Aug 15, 2020Observed: -2.05 ft at 12:30PM Aug 15, 2020Observed: -2.05 ft at 12:40PM Aug 15, 2020Observed: -2.08 ft at 12:50PM Aug 15, 2020Observed: -2.04 ft at 1:00PM Aug 15, 2020Observed: -2.02 ft at 1:10PM Aug 15, 2020Observed: -2.08 ft at 1:20PM Aug 15, 2020Observed: -2.14 ft at 1:30PM Aug 15, 2020Observed: -2.18 ft at 1:40PM Aug 15, 2020Observed: -2.17 ft at 1:50PM Aug 15, 2020Observed: -2.1 ft at 2:00PM Aug 15, 2020USGS--Water Resources of the United StatesNBGI2(plotting HGIRP) Graph Created (3:09PM Aug 15, 2020)ObservedLatest observed value: -2.1 ft at 2:00 PM CDT 15-Aug-2020. Flood Stage is 3 ft
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About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: NAVD88
Metadata
NOTE: The observations from this river gauge may be discontinued soon; for additional details please refer to information from the USGS

NOTE: Graphical forecasts are not available for the North Branch Chicago River at Chicago (Grand Ave). During times of high water, forecast crest information can be found in the text products.

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Upstream Gauge - at Chicago (Pulaski Rd) Upstream Gauge Downstream Gauge Downstream Gauge - at Chicago (Columbus Dr)
Flood Categories (in feet)
Major Flood Stage: 6
Moderate Flood Stage: 5
Flood Stage: 3
Action Stage: 2
Low Stage (in feet): -9999

Historic Crests
(1) 5.70 ft on 10/10/1954
(2) 5.00 ft on 07/24/2010
(3) 4.28 ft on 07/23/2011
(4) 3.72 ft on 10/14/2017
(5) 3.67 ft on 04/18/2013
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 3.72 ft on 10/14/2017
(2) 3.37 ft on 06/15/2015
(3) 2.86 ft on 06/30/2014
(4) 3.67 ft on 04/18/2013
(5) 1.50 ft on 08/26/2012
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:16
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 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
6.5 Numerous structures flooded near the river in the River West, River North, and West Loop neighborhoods.
6 Railroad tracks near Lake and Canal Streets are threatened.
5.5 A few residences near Grand Avenue are threatened. Railroad tracks near Union Station are threatened.
5 Lower level of residences may be threatened along Wells Street near Polk Street. Low-lying parking lots are threatened between Grand Avenue and Chicago Avenue.
3 Numerous stretches of the Chicago Riverwalk are inundated. Opening of the Chicago Lock is triggered to reduce flood impacts.
2 Low-lying sections of the Chicago Riverwalk are threatened.
About This Location Collapse

Latitude: 41.891667° N, Longitude: 87.641667° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 3 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 579.20 Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 579.48 Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other 0.0 Not Available Chicago City Datum

Current/Historical Observations:
Additional Information Collapse
This gage is on the "Chicago City Datum" (CCD). This causes stages at this gauge to often be reported as negative. Stages are not the same as river depth.
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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
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