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Hydrograph River at a Glance Download
Mississippi River at Alton Stage (ft)Observed: 19.45 ft at 7:00PM Oct 10, 2021Observed: 19.44 ft at 7:30PM Oct 10, 2021Observed: 19.42 ft at 8:00PM Oct 10, 2021Observed: 19.4 ft at 8:30PM Oct 10, 2021Observed: 19.39 ft at 9:00PM Oct 10, 2021Observed: 19.38 ft at 9:30PM Oct 10, 2021Observed: 19.36 ft at 10:00PM Oct 10, 2021Observed: 19.36 ft at 10:30PM Oct 10, 2021Observed: 19.37 ft at 11:00PM Oct 10, 2021Observed: 19.38 ft at 11:30PM Oct 10, 2021Observed: 19.38 ft at 12:00AM Oct 11, 2021Observed: 19.37 ft at 12:30AM Oct 11, 2021Observed: 19.37 ft at 1:00AM Oct 11, 2021Observed: 19.37 ft at 1:30AM Oct 11, 2021Observed: 19.37 ft at 2:00AM Oct 11, 2021Observed: 19.36 ft at 2:30AM Oct 11, 2021Observed: 19.36 ft at 3:00AM Oct 11, 2021Observed: 19.36 ft at 3:30AM Oct 11, 2021Observed: 19.35 ft at 4:00AM Oct 11, 2021Observed: 19.34 ft at 4:30AM Oct 11, 2021Observed: 19.33 ft at 5:00AM Oct 11, 2021Observed: 19.32 ft at 5:30AM Oct 11, 2021Observed: 19.31 ft at 6:00AM Oct 11, 2021Observed: 19.3 ft at 6:30AM Oct 11, 2021Observed: 19.31 ft at 7:00AM Oct 11, 2021Observed: 19.31 ft at 7:30AM Oct 11, 2021Observed: 19.3 ft at 8:00AM Oct 11, 2021Observed: 19.31 ft at 8:30AM Oct 11, 2021Observed: 19.31 ft at 9:00AM Oct 11, 2021Observed: 19.22 ft at 9:30AM Oct 11, 2021Observed: 19.22 ft at 10:00AM Oct 11, 2021Observed: 19.25 ft at 10:30AM Oct 11, 2021Observed: 19.25 ft at 11:30AM Oct 11, 2021Observed: 19.36 ft at 12:00PM Oct 11, 2021Observed: 19.34 ft at 12:30PM Oct 11, 2021Observed: 19.33 ft at 1:00PM Oct 11, 2021Observed: 19.21 ft at 1:30PM Oct 11, 2021Observed: 19.3 ft at 2:00PM Oct 11, 2021Observed: 19.3 ft at 2:30PM Oct 11, 2021Observed: 19.39 ft at 3:00PM Oct 11, 2021Observed: 19.37 ft at 3:30PM Oct 11, 2021Observed: 19.48 ft at 4:00PM Oct 11, 2021Observed: 19.42 ft at 4:30PM Oct 11, 2021Observed: 19.43 ft at 5:00PM Oct 11, 2021Observed: 19.49 ft at 5:30PM Oct 11, 2021Observed: 19.5 ft at 6:00PM Oct 11, 2021Observed: 19.49 ft at 6:30PM Oct 11, 2021Observed: 19.49 ft at 7:00PM Oct 11, 2021Observed: 19.47 ft at 7:30PM Oct 11, 2021Observed: 19.47 ft at 8:00PM Oct 11, 2021Observed: 19.47 ft at 8:30PM Oct 11, 2021Observed: 19.45 ft at 9:00PM Oct 11, 2021Observed: 19.44 ft at 9:30PM Oct 11, 2021Observed: 19.43 ft at 10:00PM Oct 11, 2021Observed: 19.44 ft at 10:30PM Oct 11, 2021Observed: 19.45 ft at 11:00PM Oct 11, 2021Observed: 19.46 ft at 11:30PM Oct 11, 2021Observed: 19.47 ft at 12:00AM Oct 12, 2021Observed: 19.47 ft at 12:30AM Oct 12, 2021Observed: 19.48 ft at 1:00AM Oct 12, 2021Observed: 19.49 ft at 1:30AM Oct 12, 2021Observed: 19.5 ft at 2:00AM Oct 12, 2021Observed: 19.5 ft at 2:30AM Oct 12, 2021Observed: 19.51 ft at 3:00AM Oct 12, 2021Observed: 19.51 ft at 3:30AM Oct 12, 2021Observed: 19.51 ft at 4:00AM Oct 12, 2021Observed: 19.5 ft at 4:30AM Oct 12, 2021Observed: 19.49 ft at 5:00AM Oct 12, 2021Observed: 19.5 ft at 5:30AM Oct 12, 2021Observed: 19.48 ft at 6:00AM Oct 12, 2021Observed: 19.46 ft at 6:30AM Oct 12, 2021Observed: 19.48 ft at 7:00AM Oct 12, 2021Observed: 19.49 ft at 7:30AM Oct 12, 2021Observed: 19.51 ft at 8:00AM Oct 12, 2021Observed: 19.52 ft at 8:30AM Oct 12, 2021Observed: 19.51 ft at 9:00AM Oct 12, 2021Observed: 19.53 ft at 9:30AM Oct 12, 2021Observed: 19.53 ft at 10:00AM Oct 12, 2021Observed: 19.53 ft at 10:30AM Oct 12, 2021Observed: 19.53 ft at 11:00AM Oct 12, 2021Observed: 19.55 ft at 11:30AM Oct 12, 2021Observed: 19.55 ft at 12:00PM Oct 12, 2021Highest Observation: 19.56 ft at 12:30PM Oct 12, 2021Observed: 19.54 ft at 1:00PM Oct 12, 2021Observed: 19.54 ft at 2:00PM Oct 12, 2021Observed: 19.54 ft at 3:00PM Oct 12, 2021Observed: 19.54 ft at 3:30PM Oct 12, 2021Observed: 19.54 ft at 4:00PM Oct 12, 2021Observed: 19.54 ft at 4:30PM Oct 12, 2021Observed: 19.53 ft at 5:00PM Oct 12, 2021Observed: 19.52 ft at 5:30PM Oct 12, 2021Observed: 19.52 ft at 6:00PM Oct 12, 2021Observed: 19.52 ft at 6:30PM Oct 12, 2021Observed: 19.52 ft at 7:00PM Oct 12, 2021Observed: 19.52 ft at 7:30PM Oct 12, 2021Observed: 19.5 ft at 8:00PM Oct 12, 2021Observed: 19.49 ft at 8:30PM Oct 12, 2021Observed: 19.48 ft at 9:00PM Oct 12, 2021Observed: 19.47 ft at 9:30PM Oct 12, 2021Observed: 19.47 ft at 10:00PM Oct 12, 2021Observed: 19.45 ft at 10:30PM Oct 12, 2021Observed: 19.43 ft at 11:00PM Oct 12, 2021Observed: 19.43 ft at 11:30PM Oct 12, 2021Observed: 19.42 ft at 12:00AM Oct 13, 2021Observed: 19.41 ft at 12:30AM Oct 13, 2021Observed: 19.4 ft at 1:00AM Oct 13, 2021Observed: 19.4 ft at 1:30AM Oct 13, 2021Observed: 19.39 ft at 2:00AM Oct 13, 2021Observed: 19.39 ft at 2:30AM Oct 13, 2021Observed: 19.38 ft at 3:00AM Oct 13, 2021Observed: 19.37 ft at 3:30AM Oct 13, 2021Observed: 19.35 ft at 4:00AM Oct 13, 2021Observed: 19.34 ft at 4:30AM Oct 13, 2021Observed: 19.28 ft at 5:00AM Oct 13, 2021Observed: 19.3 ft at 5:30AM Oct 13, 2021Observed: 19.3 ft at 6:00AM Oct 13, 2021Observed: 19.29 ft at 6:30AM Oct 13, 2021Observed: 19.28 ft at 7:00AM Oct 13, 2021Observed: 19.26 ft at 7:30AM Oct 13, 2021Observed: 19.26 ft at 8:00AM Oct 13, 2021Observed: 19.26 ft at 8:30AM Oct 13, 2021Observed: 19.25 ft at 9:00AM Oct 13, 2021Observed: 19.24 ft at 9:30AM Oct 13, 2021Observed: 19.23 ft at 10:00AM Oct 13, 2021Observed: 19.22 ft at 10:30AM Oct 13, 2021Observed: 19.22 ft at 11:00AM Oct 13, 2021Observed: 19.22 ft at 11:30AM Oct 13, 2021Observed: 19.22 ft at 12:00PM Oct 13, 2021Observed: 19.21 ft at 12:30PM Oct 13, 2021Observed: 19.19 ft at 1:00PM Oct 13, 2021Observed: 19.13 ft at 2:30PM Oct 13, 2021Observed: 19.14 ft at 3:00PM Oct 13, 2021Observed: 19.15 ft at 3:30PM Oct 13, 2021Observed: 19.14 ft at 4:00PM Oct 13, 2021Observed: 19.14 ft at 4:30PM Oct 13, 2021Observed: 19.14 ft at 5:00PM Oct 13, 2021Observed: 19.12 ft at 5:30PM Oct 13, 2021Observed: 19.12 ft at 6:00PM Oct 13, 2021Observed: 19.14 ft at 6:30PM Oct 13, 2021Observed: 19.14 ft at 7:00PM Oct 13, 2021Observed: 19.15 ft at 7:30PM Oct 13, 2021Observed: 19.15 ft at 8:00PM Oct 13, 2021Observed: 19.15 ft at 8:30PM Oct 13, 2021Observed: 19.15 ft at 9:00PM Oct 13, 2021Observed: 19.15 ft at 9:30PM Oct 13, 2021Observed: 19.15 ft at 10:00PM Oct 13, 2021Observed: 19.16 ft at 10:30PM Oct 13, 2021Observed: 19.16 ft at 11:00PM Oct 13, 2021Observed: 19.16 ft at 11:30PM Oct 13, 2021Observed: 19.15 ft at 12:00AM Oct 14, 2021Observed: 19.15 ft at 12:30AM Oct 14, 2021Observed: 19.17 ft at 1:00AM Oct 14, 2021Observed: 19.17 ft at 1:30AM Oct 14, 2021Observed: 19.18 ft at 2:00AM Oct 14, 2021Observed: 19.18 ft at 2:30AM Oct 14, 2021Observed: 19.19 ft at 3:00AM Oct 14, 2021Observed: 19.2 ft at 3:30AM Oct 14, 2021Observed: 19.22 ft at 4:00AM Oct 14, 2021Observed: 19.25 ft at 4:30AM Oct 14, 2021Observed: 19.26 ft at 5:00AM Oct 14, 2021Observed: 19.26 ft at 5:30AM Oct 14, 2021Observed: 19.27 ft at 6:00AM Oct 14, 2021Observed: 19.29 ft at 6:30AM Oct 14, 2021Observed: 19.31 ft at 7:00AM Oct 14, 2021Observed: 19.33 ft at 7:30AM Oct 14, 2021Observed: 19.31 ft at 8:00AM Oct 14, 2021Observed: 19.2 ft at 8:30AM Oct 14, 2021Observed: 19.19 ft at 9:00AM Oct 14, 2021Observed: 19.25 ft at 9:30AM Oct 14, 2021Observed: 19.23 ft at 10:00AM Oct 14, 2021Observed: 19.23 ft at 10:30AM Oct 14, 2021Observed: 19.2 ft at 11:00AM Oct 14, 2021Observed: 19.22 ft at 11:30AM Oct 14, 2021Observed: 19.18 ft at 12:30PM Oct 14, 2021Observed: 19.19 ft at 1:00PM Oct 14, 2021Observed: 19.19 ft at 1:30PM Oct 14, 2021Observed: 19.18 ft at 2:00PM Oct 14, 2021Observed: 19.11 ft at 2:30PM Oct 14, 2021Observed: 19.04 ft at 3:00PM Oct 14, 2021Observed: 19.03 ft at 3:30PM Oct 14, 2021Observed: 18.91 ft at 4:00PM Oct 14, 2021Observed: 18.98 ft at 4:30PM Oct 14, 2021Observed: 18.97 ft at 5:00PM Oct 14, 2021Observed: 18.95 ft at 5:30PM Oct 14, 2021Observed: 18.88 ft at 6:00PM Oct 14, 2021Observed: 18.89 ft at 6:30PM Oct 14, 2021Observed: 18.87 ft at 7:00PM Oct 14, 2021Observed: 18.85 ft at 7:30PM Oct 14, 2021Observed: 18.84 ft at 8:00PM Oct 14, 2021Observed: 18.82 ft at 8:30PM Oct 14, 2021Observed: 18.79 ft at 9:00PM Oct 14, 2021Observed: 18.77 ft at 9:30PM Oct 14, 2021Observed: 18.69 ft at 10:00PM Oct 14, 2021Observed: 18.69 ft at 10:30PM Oct 14, 2021Observed: 18.67 ft at 11:00PM Oct 14, 2021Observed: 18.67 ft at 11:30PM Oct 14, 2021Observed: 18.69 ft at 12:00AM Oct 15, 2021Observed: 18.7 ft at 12:30AM Oct 15, 2021Observed: 18.72 ft at 1:00AM Oct 15, 2021Observed: 18.78 ft at 1:30AM Oct 15, 2021Observed: 18.77 ft at 2:00AM Oct 15, 2021Observed: 18.78 ft at 2:30AM Oct 15, 2021Observed: 18.79 ft at 3:00AM Oct 15, 2021Observed: 18.97 ft at 3:30AM Oct 15, 2021Observed: 19.08 ft at 4:00AM Oct 15, 2021Observed: 19.1 ft at 4:30AM Oct 15, 2021Observed: 19.13 ft at 5:00AM Oct 15, 2021Observed: 19.24 ft at 5:30AM Oct 15, 2021Observed: 19.25 ft at 6:00AM Oct 15, 2021Observed: 19.31 ft at 6:30AM Oct 15, 2021Observed: 19.27 ft at 7:30AM Oct 15, 2021Observed: 19.15 ft at 8:00AM Oct 15, 2021Observed: 19.05 ft at 9:00AM Oct 15, 2021Observed: 19.03 ft at 9:30AM Oct 15, 2021Observed: 18.95 ft at 10:00AM Oct 15, 2021Observed: 18.86 ft at 10:30AM Oct 15, 2021Observed: 18.84 ft at 11:00AM Oct 15, 2021Observed: 18.75 ft at 11:30AM Oct 15, 2021Observed: 18.74 ft at 12:00PM Oct 15, 2021Observed: 18.72 ft at 12:30PM Oct 15, 2021Observed: 18.72 ft at 1:00PM Oct 15, 2021Observed: 18.74 ft at 1:30PM Oct 15, 2021Observed: 18.76 ft at 2:00PM Oct 15, 2021Observed: 18.78 ft at 2:30PM Oct 15, 2021Observed: 18.89 ft at 3:00PM Oct 15, 2021Observed: 18.89 ft at 3:30PM Oct 15, 2021Observed: 18.87 ft at 4:00PM Oct 15, 2021Observed: 18.93 ft at 4:30PM Oct 15, 2021Observed: 19 ft at 5:00PM Oct 15, 2021Observed: 18.99 ft at 5:30PM Oct 15, 2021Observed: 18.97 ft at 6:00PM Oct 15, 2021Observed: 18.97 ft at 6:30PM Oct 15, 2021Observed: 18.98 ft at 7:00PM Oct 15, 2021Observed: 18.97 ft at 7:30PM Oct 15, 2021Observed: 18.97 ft at 8:00PM Oct 15, 2021Observed: 18.94 ft at 8:30PM Oct 15, 2021Observed: 18.95 ft at 9:00PM Oct 15, 2021Observed: 18.95 ft at 9:30PM Oct 15, 2021Observed: 18.95 ft at 10:00PM Oct 15, 2021Observed: 18.96 ft at 10:30PM Oct 15, 2021Observed: 18.96 ft at 11:00PM Oct 15, 2021Observed: 18.97 ft at 11:30PM Oct 15, 2021Observed: 18.98 ft at 12:00AM Oct 16, 2021Observed: 18.98 ft at 12:30AM Oct 16, 2021Observed: 18.96 ft at 1:00AM Oct 16, 2021Observed: 18.96 ft at 1:30AM Oct 16, 2021Observed: 18.94 ft at 2:00AM Oct 16, 2021Observed: 18.95 ft at 2:30AM Oct 16, 2021Observed: 18.94 ft at 3:00AM Oct 16, 2021Observed: 18.93 ft at 3:30AM Oct 16, 2021Observed: 18.91 ft at 4:00AM Oct 16, 2021Observed: 18.9 ft at 4:30AM Oct 16, 2021Observed: 18.89 ft at 5:00AM Oct 16, 2021Observed: 18.86 ft at 5:30AM Oct 16, 2021Observed: 18.84 ft at 6:00AM Oct 16, 2021Observed: 18.84 ft at 6:30AM Oct 16, 2021Observed: 18.84 ft at 7:00AM Oct 16, 2021Observed: 18.82 ft at 7:30AM Oct 16, 2021Observed: 18.81 ft at 8:00AM Oct 16, 2021Observed: 18.8 ft at 8:30AM Oct 16, 2021Observed: 18.78 ft at 9:00AM Oct 16, 2021Observed: 18.77 ft at 9:30AM Oct 16, 2021Observed: 18.83 ft at 10:00AM Oct 16, 2021Observed: 18.9 ft at 10:30AM Oct 16, 2021Observed: 18.97 ft at 11:00AM Oct 16, 2021Observed: 18.96 ft at 11:30AM Oct 16, 2021Observed: 19.05 ft at 12:00PM Oct 16, 2021Observed: 19.07 ft at 12:30PM Oct 16, 2021Observed: 19.1 ft at 1:00PM Oct 16, 2021Observed: 19.12 ft at 1:30PM Oct 16, 2021Observed: 19.21 ft at 2:30PM Oct 16, 2021Observed: 19.21 ft at 3:00PM Oct 16, 2021Observed: 19.2 ft at 3:30PM Oct 16, 2021Observed: 19.09 ft at 4:00PM Oct 16, 2021Observed: 19.1 ft at 4:30PM Oct 16, 2021Observed: 19.08 ft at 5:00PM Oct 16, 2021Observed: 19.06 ft at 5:30PM Oct 16, 2021Observed: 18.99 ft at 6:00PM Oct 16, 2021Observed: 18.99 ft at 6:30PM Oct 16, 2021Observed: 18.96 ft at 7:00PM Oct 16, 2021Observed: 18.96 ft at 7:30PM Oct 16, 2021Observed: 18.89 ft at 8:00PM Oct 16, 2021Observed: 18.9 ft at 8:30PM Oct 16, 2021Observed: 18.9 ft at 9:00PM Oct 16, 2021Observed: 18.83 ft at 9:30PM Oct 16, 2021Observed: 18.86 ft at 10:00PM Oct 16, 2021Observed: 18.87 ft at 10:30PM Oct 16, 2021Observed: 18.85 ft at 11:00PM Oct 16, 2021Observed: 18.84 ft at 11:30PM Oct 16, 2021Observed: 18.81 ft at 12:00AM Oct 17, 2021Observed: 18.82 ft at 12:30AM Oct 17, 2021Observed: 18.81 ft at 1:00AM Oct 17, 2021Observed: 18.8 ft at 1:30AM Oct 17, 2021Observed: 18.8 ft at 2:00AM Oct 17, 2021Observed: 18.78 ft at 2:30AM Oct 17, 2021Observed: 18.76 ft at 3:00AM Oct 17, 2021Observed: 18.74 ft at 3:30AM Oct 17, 2021Observed: 18.75 ft at 4:00AM Oct 17, 2021Observed: 18.74 ft at 4:30AM Oct 17, 2021Observed: 18.73 ft at 5:00AM Oct 17, 2021Observed: 18.73 ft at 5:30AM Oct 17, 2021Observed: 18.8 ft at 6:00AM Oct 17, 2021Observed: 18.81 ft at 6:30AM Oct 17, 2021Observed: 18.88 ft at 7:00AM Oct 17, 2021Observed: 18.86 ft at 7:30AM Oct 17, 2021Observed: 18.88 ft at 8:00AM Oct 17, 2021Observed: 18.9 ft at 8:30AM Oct 17, 2021Observed: 18.92 ft at 9:00AM Oct 17, 2021Observed: 18.95 ft at 9:30AM Oct 17, 2021Observed: 18.96 ft at 10:00AM Oct 17, 2021Observed: 18.97 ft at 10:30AM Oct 17, 2021Observed: 18.98 ft at 11:00AM Oct 17, 2021Observed: 19.01 ft at 11:30AM Oct 17, 2021Observed: 18.99 ft at 12:00PM Oct 17, 2021Observed: 19.01 ft at 12:30PM Oct 17, 2021Observed: 19.02 ft at 1:00PM Oct 17, 2021Observed: 19.09 ft at 1:30PM Oct 17, 2021Observed: 19.1 ft at 2:00PM Oct 17, 2021Observed: 19.13 ft at 2:30PM Oct 17, 2021Observed: 19.14 ft at 3:00PM Oct 17, 2021Observed: 19.19 ft at 4:00PM Oct 17, 2021Observed: 19.19 ft at 4:30PM Oct 17, 2021Observed: 19.18 ft at 5:00PM Oct 17, 2021Observed: 19.12 ft at 5:30PM Oct 17, 2021Observed: 19.13 ft at 6:00PM Oct 17, 2021Observed: 19.13 ft at 6:30PM Oct 17, 2021Observed: 19.13 ft at 7:00PM Oct 17, 2021Observed: 19.12 ft at 7:30PM Oct 17, 2021Observed: 19.09 ft at 8:00PM Oct 17, 2021Observed: 19.1 ft at 8:30PM Oct 17, 2021Observed: 19.1 ft at 9:00PM Oct 17, 2021Observed: 19.11 ft at 9:30PM Oct 17, 2021Observed: 19.09 ft at 10:00PM Oct 17, 2021Observed: 19.1 ft at 10:30PM Oct 17, 2021Observed: 19.1 ft at 11:00PM Oct 17, 2021Observed: 19.09 ft at 11:30PM Oct 17, 2021Observed: 19.09 ft at 12:00AM Oct 18, 2021Observed: 19.09 ft at 12:30AM Oct 18, 2021Observed: 19.08 ft at 1:00AM Oct 18, 2021Observed: 19.09 ft at 1:30AM Oct 18, 2021Observed: 19.08 ft at 2:00AM Oct 18, 2021Observed: 19.08 ft at 2:30AM Oct 18, 2021Observed: 19.08 ft at 3:00AM Oct 18, 2021Observed: 19.08 ft at 3:30AM Oct 18, 2021Observed: 19.08 ft at 4:00AM Oct 18, 2021Observed: 19.09 ft at 4:30AM Oct 18, 2021Observed: 19.1 ft at 5:00AM Oct 18, 2021Observed: 19.11 ft at 5:30AM Oct 18, 2021Observed: 19.11 ft at 6:00AM Oct 18, 2021Observed: 19.12 ft at 6:30AM Oct 18, 2021Observed: 19.13 ft at 7:30AM Oct 18, 2021Observed: 19.14 ft at 8:00AM Oct 18, 2021Observed: 19.06 ft at 8:30AM Oct 18, 2021Observed: 19.05 ft at 9:00AM Oct 18, 2021Observed: 19.13 ft at 9:30AM Oct 18, 2021Observed: 19.14 ft at 10:00AM Oct 18, 2021Observed: 19.14 ft at 10:30AM Oct 18, 2021Observed: 19.15 ft at 11:00AM Oct 18, 2021Observed: 19.16 ft at 11:30AM Oct 18, 2021Observed: 19.16 ft at 12:00PM Oct 18, 2021Observed: 19.17 ft at 12:30PM Oct 18, 2021Observed: 19.18 ft at 1:00PM Oct 18, 2021Observed: 19.19 ft at 1:30PM Oct 18, 2021Observed: 19.18 ft at 2:00PM Oct 18, 2021Observed: 19.19 ft at 2:30PM Oct 18, 2021Observed: 19.2 ft at 3:00PM Oct 18, 2021Observed: 19.2 ft at 3:30PM Oct 18, 2021Observed: 19.21 ft at 4:00PM Oct 18, 2021Observed: 19.2 ft at 4:30PM Oct 18, 2021Observed: 19.2 ft at 5:00PM Oct 18, 2021Observed: 19.2 ft at 5:30PM Oct 18, 2021Observed: 19.21 ft at 6:00PM Oct 18, 2021Observed: 19.21 ft at 6:30PM Oct 18, 2021Observed: 19.22 ft at 7:00PM Oct 18, 2021Observed: 19.22 ft at 7:30PM Oct 18, 2021Observed: 19.22 ft at 8:00PM Oct 18, 2021Observed: 19.22 ft at 8:30PM Oct 18, 2021Observed: 19.21 ft at 9:00PM Oct 18, 2021Observed: 19.21 ft at 9:30PM Oct 18, 2021Observed: 19.2 ft at 10:00PM Oct 18, 2021Observed: 19.2 ft at 10:30PM Oct 18, 2021Observed: 19.18 ft at 11:00PM Oct 18, 2021Observed: 19.18 ft at 11:30PM Oct 18, 2021Observed: 19.18 ft at 12:00AM Oct 19, 2021Observed: 19.18 ft at 12:30AM Oct 19, 2021Observed: 19.18 ft at 1:00AM Oct 19, 2021Observed: 19.17 ft at 1:30AM Oct 19, 2021Observed: 19.17 ft at 2:00AM Oct 19, 2021Observed: 19.16 ft at 2:30AM Oct 19, 2021Observed: 19.15 ft at 3:00AM Oct 19, 2021Observed: 19.14 ft at 3:30AM Oct 19, 2021Observed: 19.14 ft at 4:00AM Oct 19, 2021Observed: 19.13 ft at 4:30AM Oct 19, 2021Observed: 19.11 ft at 5:00AM Oct 19, 2021Observed: 19.1 ft at 5:30AM Oct 19, 2021Observed: 19.09 ft at 6:00AM Oct 19, 2021Observed: 19.07 ft at 6:30AM Oct 19, 2021Observed: 19.06 ft at 7:00AM Oct 19, 2021Observed: 19.05 ft at 7:30AM Oct 19, 2021Observed: 19.04 ft at 8:00AM Oct 19, 2021Observed: 19.02 ft at 8:30AM Oct 19, 2021Observed: 19.01 ft at 9:00AM Oct 19, 2021Observed: 19 ft at 9:30AM Oct 19, 2021Observed: 18.99 ft at 10:00AM Oct 19, 2021Observed: 18.98 ft at 10:30AM Oct 19, 2021Observed: 18.97 ft at 11:00AM Oct 19, 2021Observed: 18.97 ft at 11:30AM Oct 19, 2021Observed: 18.95 ft at 12:30PM Oct 19, 2021Observed: 18.97 ft at 1:00PM Oct 19, 2021Observed: 18.97 ft at 1:30PM Oct 19, 2021Observed: 18.99 ft at 2:00PM Oct 19, 2021Observed: 18.98 ft at 2:30PM Oct 19, 2021Observed: 18.97 ft at 3:00PM Oct 19, 2021Observed: 18.98 ft at 3:30PM Oct 19, 2021Observed: 18.97 ft at 4:00PM Oct 19, 2021Observed: 18.97 ft at 4:30PM Oct 19, 2021Observed: 18.95 ft at 5:00PM Oct 19, 2021Observed: 18.96 ft at 5:30PM Oct 19, 2021Observed: 18.96 ft at 6:00PM Oct 19, 2021Observed: 18.95 ft at 6:30PM Oct 19, 2021Observed: 18.95 ft at 7:00PM Oct 19, 2021Observed: 18.95 ft at 7:30PM Oct 19, 2021Observed: 18.94 ft at 8:00PM Oct 19, 2021Observed: 18.94 ft at 8:30PM Oct 19, 2021Observed: 18.95 ft at 9:00PM Oct 19, 2021Observed: 18.95 ft at 9:30PM Oct 19, 2021Observed: 18.96 ft at 10:00PM Oct 19, 2021Observed: 18.97 ft at 10:30PM Oct 19, 2021Observed: 18.97 ft at 11:00PM Oct 19, 2021Observed: 18.98 ft at 11:30PM Oct 19, 2021Observed: 18.98 ft at 12:00AM Oct 20, 2021Observed: 18.98 ft at 12:30AM Oct 20, 2021Observed: 18.99 ft at 1:00AM Oct 20, 2021Observed: 19 ft at 1:30AM Oct 20, 2021Observed: 18.99 ft at 2:00AM Oct 20, 2021Observed: 18.99 ft at 2:30AM Oct 20, 2021Observed: 18.99 ft at 3:00AM Oct 20, 2021Observed: 18.99 ft at 3:30AM Oct 20, 2021Observed: 19 ft at 4:00AM Oct 20, 2021Observed: 19 ft at 4:30AM Oct 20, 2021Observed: 18.99 ft at 5:00AM Oct 20, 2021Observed: 18.99 ft at 5:30AM Oct 20, 2021Observed: 18.99 ft at 6:00AM Oct 20, 2021Observed: 18.99 ft at 6:30AM Oct 20, 2021Observed: 19 ft at 7:00AM Oct 20, 2021Observed: 19.01 ft at 7:30AM Oct 20, 2021Observed: 19.01 ft at 8:00AM Oct 20, 2021Observed: 19 ft at 8:30AM Oct 20, 2021Observed: 19.01 ft at 9:00AM Oct 20, 2021Observed: 19.01 ft at 9:30AM Oct 20, 2021Observed: 19 ft at 10:00AM Oct 20, 2021Observed: 19 ft at 10:30AM Oct 20, 2021Observed: 18.98 ft at 11:00AM Oct 20, 2021Observed: 18.99 ft at 11:30AM Oct 20, 2021Observed: 19 ft at 12:00PM Oct 20, 2021Observed: 19 ft at 12:30PM Oct 20, 2021Observed: 19.03 ft at 1:00PM Oct 20, 2021Observed: 19.05 ft at 1:30PM Oct 20, 2021Observed: 19.06 ft at 2:00PM Oct 20, 2021Observed: 19.06 ft at 2:30PM Oct 20, 2021Observed: 19.07 ft at 3:00PM Oct 20, 2021Observed: 19.07 ft at 4:00PM Oct 20, 2021Observed: 19.07 ft at 4:30PM Oct 20, 2021Observed: 19.09 ft at 5:00PM Oct 20, 2021Observed: 19.09 ft at 5:30PM Oct 20, 2021Observed: 19.1 ft at 6:00PM Oct 20, 2021Observed: 19.11 ft at 6:30PM Oct 20, 2021USGS--Water Resources of the United StatesALOI2(plotting HGIRG) Graph Created (6:55PM Oct 20, 2021)ObservedLatest observed value: 19.11 ft at 6:30 PM CDT 20-Oct-2021. Flood Stage is 21 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (CDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts are not available for the Mississippi River at Alton. Only observed stages are available for this point.
Return to Area Map
Upstream Gauge - at Grafton Upstream Gauge Downstream Gauge Downstream Gauge - at Mel Price (Alton) Lock and Dam
Flood Categories (in feet)
Major Flood Stage: 31
Moderate Flood Stage: 24
Flood Stage: 21
Action Stage: 20
Low Stage (in feet): -9999

Historic Crests
(1) 39.55 ft on 08/01/1993
(2) 35.30 ft on 06/09/2019
(3) 31.94 ft on 01/01/2016
(4) 31.60 ft on 05/07/2019
(5) 31.43 ft on 05/22/1995
(6) 31.27 ft on 06/04/2013
(7) 31.02 ft on 05/06/2017
(8) 29.78 ft on 06/29/2008
(9) 29.11 ft on 06/30/2015
(10) 28.77 ft on 04/03/2019
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 21.70 ft on 03/20/2021
(2) 21.69 ft on 06/01/2020
(3) 20.30 ft on 03/29/2020
(4) 21.86 ft on 10/13/2019
(5) 35.30 ft on 06/09/2019
(6) 31.60 ft on 05/07/2019
(7) 28.77 ft on 04/03/2019
(8) 23.71 ft on 10/17/2018
(9) 31.02 ft on 05/06/2017
(10) 31.94 ft on 01/01/2016
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.00 ft on 11/07/1948
(2) 0.10 ft on 01/15/2003
(3) 3.20 ft on 01/10/1980

For more information on your flood risk go to www.floodsmart.gov.

Zoom Level:16
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Gauge LocationGauge Map Marker
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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
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38.6 Near this height, floodwaters will reach the floor of the Lincoln Shields gazebo in West Alton, Missouri.
36.7 The railroad between Wood River and Alton begins flooding near this height.
32 At this height, the waterpark playground will become inundated.
30.9 Near this height, water will cover the sidewalk near the amphitheatre.
30.8 The intersection of West Broadway (Illinois 100) and U.S. Highway 67 will begin flooding near this height.
29.7 Floodwater begins damaging property in Elsah, Illinois and in Portage des Sioux, Missouri near this height.
29 Near this height, floodwater should begin to impact the base of the Ardent Mills grain bins.
28.3 MoDOT will sandbag Lincoln Shields Access to protect U.S. Highway 367 near the Clark bridge.
28.2 At this height, water will cover the sidewalk near the waterpark playground.
28 Near this height, the flood wall around the Argosy Casino will overtop, flooding the casino parking lot.
27.2 At this height, Bloch Marine Service at Harbor Point Yacht Club begins flooding.
26.6 Route 100 at Alton closes at this height.
24.5 Highway 100 begins flooding at the Clifton Terrace Street intersection near this height.
24.2 The Wood River South Levee flood gate is closed near this height.
22.2 Missouri Highway 94 between Portage Des Sioux and West Alton begins flooding. Yachtview Drive begins flooding along the entrance to Harbor Point Yacht Club.
21.7 At this level, Highway 94 and the east end of Harbor Point Road off of Missouri Highway 94 north of West Alton begin flooding. Also, the access road the Lincoln Shields recreation area off of U.S. Highway 367 just west of the Clark bridge begins flooding.
20.7 During open river conditions (Mel Price gates all open), Alta Villa Road off of Highway 94 begins flooding and is closed.
19.7 During open river conditions (Mel Price gates are open), Dresser Island Drive begins flooding near this level.
About This Location Collapse

Latitude: 38.887222° N, Longitude: 90.183889° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 21 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 Not Available 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:

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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
St. Louis Weather Forecast Office
12 Missouri Research Park Drive
St. Charles, MO 63304
(636) 441-8467
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Page last modified: 2-Nov-2020 7:29 PM
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