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Hydrograph River at a Glance Download
Mississippi River at Alton Stage (ft)Highest Observation: 20.05 ft at 7:00PM May 07, 2022Observed: 20.04 ft at 7:30PM May 07, 2022Observed: 20.03 ft at 8:00PM May 07, 2022Observed: 20.01 ft at 8:30PM May 07, 2022Observed: 19.99 ft at 9:00PM May 07, 2022Observed: 19.96 ft at 9:30PM May 07, 2022Observed: 19.95 ft at 10:00PM May 07, 2022Observed: 19.93 ft at 10:30PM May 07, 2022Observed: 19.91 ft at 11:00PM May 07, 2022Observed: 19.9 ft at 11:30PM May 07, 2022Observed: 19.88 ft at 12:00AM May 08, 2022Observed: 19.8 ft at 12:30AM May 08, 2022Observed: 19.8 ft at 1:00AM May 08, 2022Observed: 19.79 ft at 1:30AM May 08, 2022Observed: 19.78 ft at 2:00AM May 08, 2022Observed: 19.77 ft at 2:30AM May 08, 2022Observed: 19.76 ft at 3:00AM May 08, 2022Observed: 19.68 ft at 3:30AM May 08, 2022Observed: 19.69 ft at 4:00AM May 08, 2022Observed: 19.68 ft at 4:30AM May 08, 2022Observed: 19.68 ft at 5:00AM May 08, 2022Observed: 19.61 ft at 5:30AM May 08, 2022Observed: 19.6 ft at 6:00AM May 08, 2022Observed: 19.54 ft at 6:30AM May 08, 2022Observed: 19.54 ft at 7:00AM May 08, 2022Observed: 19.54 ft at 7:30AM May 08, 2022Observed: 19.52 ft at 8:00AM May 08, 2022Observed: 19.49 ft at 8:30AM May 08, 2022Observed: 19.48 ft at 9:00AM May 08, 2022Observed: 19.44 ft at 9:30AM May 08, 2022Observed: 19.41 ft at 10:00AM May 08, 2022Observed: 19.39 ft at 10:30AM May 08, 2022Observed: 19.36 ft at 11:00AM May 08, 2022Observed: 19.29 ft at 11:30AM May 08, 2022Observed: 19.29 ft at 12:00PM May 08, 2022Observed: 19.29 ft at 12:30PM May 08, 2022Observed: 19.26 ft at 1:00PM May 08, 2022Observed: 19.25 ft at 1:30PM May 08, 2022Observed: 19.24 ft at 2:00PM May 08, 2022Observed: 19.21 ft at 2:30PM May 08, 2022Observed: 19.15 ft at 3:00PM May 08, 2022Observed: 19.13 ft at 3:30PM May 08, 2022Observed: 19.1 ft at 4:00PM May 08, 2022Observed: 19.08 ft at 4:30PM May 08, 2022Observed: 19 ft at 5:00PM May 08, 2022Observed: 19.03 ft at 5:30PM May 08, 2022Observed: 19 ft at 6:00PM May 08, 2022Observed: 19 ft at 6:30PM May 08, 2022Observed: 19 ft at 7:00PM May 08, 2022Observed: 18.93 ft at 7:30PM May 08, 2022Observed: 18.94 ft at 8:00PM May 08, 2022Observed: 18.89 ft at 8:30PM May 08, 2022Observed: 18.89 ft at 9:00PM May 08, 2022Observed: 18.87 ft at 9:30PM May 08, 2022Observed: 18.85 ft at 10:00PM May 08, 2022Observed: 18.84 ft at 10:30PM May 08, 2022Observed: 18.82 ft at 11:00PM May 08, 2022Observed: 18.8 ft at 11:30PM May 08, 2022Observed: 18.73 ft at 12:00AM May 09, 2022Observed: 18.72 ft at 12:30AM May 09, 2022Observed: 18.7 ft at 1:00AM May 09, 2022Observed: 18.68 ft at 1:30AM May 09, 2022Observed: 18.68 ft at 2:00AM May 09, 2022Observed: 18.65 ft at 2:30AM May 09, 2022Observed: 18.64 ft at 3:00AM May 09, 2022Observed: 18.61 ft at 3:30AM May 09, 2022Observed: 18.6 ft at 4:00AM May 09, 2022Observed: 18.52 ft at 4:30AM May 09, 2022Observed: 18.54 ft at 5:00AM May 09, 2022Observed: 18.53 ft at 5:30AM May 09, 2022Observed: 18.51 ft at 6:00AM May 09, 2022Observed: 18.49 ft at 6:30AM May 09, 2022Observed: 18.46 ft at 7:00AM May 09, 2022Observed: 18.44 ft at 7:30AM May 09, 2022Observed: 18.37 ft at 8:00AM May 09, 2022Observed: 18.37 ft at 8:30AM May 09, 2022Observed: 18.36 ft at 9:00AM May 09, 2022Observed: 18.34 ft at 9:30AM May 09, 2022Observed: 18.32 ft at 10:00AM May 09, 2022Observed: 18.31 ft at 10:30AM May 09, 2022Observed: 18.29 ft at 11:00AM May 09, 2022Observed: 18.29 ft at 11:30AM May 09, 2022Observed: 18.28 ft at 12:00PM May 09, 2022Observed: 18.2 ft at 12:30PM May 09, 2022Observed: 18.2 ft at 1:00PM May 09, 2022Observed: 18.21 ft at 1:30PM May 09, 2022Observed: 18.14 ft at 2:00PM May 09, 2022Observed: 18.15 ft at 2:30PM May 09, 2022Observed: 18.16 ft at 3:00PM May 09, 2022Observed: 18.14 ft at 3:30PM May 09, 2022Observed: 18.13 ft at 4:00PM May 09, 2022Observed: 18.07 ft at 4:30PM May 09, 2022Observed: 18.07 ft at 5:00PM May 09, 2022Observed: 18.06 ft at 5:30PM May 09, 2022Observed: 18.03 ft at 6:00PM May 09, 2022Observed: 18.01 ft at 6:30PM May 09, 2022Observed: 18.01 ft at 7:00PM May 09, 2022Observed: 17.93 ft at 7:30PM May 09, 2022Observed: 17.92 ft at 8:00PM May 09, 2022Observed: 17.91 ft at 8:30PM May 09, 2022Observed: 17.91 ft at 9:00PM May 09, 2022Observed: 17.85 ft at 9:30PM May 09, 2022Observed: 17.85 ft at 10:00PM May 09, 2022Observed: 17.83 ft at 10:30PM May 09, 2022Observed: 17.75 ft at 11:00PM May 09, 2022Observed: 17.77 ft at 11:30PM May 09, 2022Observed: 17.76 ft at 12:00AM May 10, 2022Observed: 17.75 ft at 12:30AM May 10, 2022Observed: 17.74 ft at 1:00AM May 10, 2022Observed: 17.72 ft at 1:30AM May 10, 2022Observed: 17.72 ft at 2:00AM May 10, 2022Observed: 17.64 ft at 2:30AM May 10, 2022Observed: 17.62 ft at 3:00AM May 10, 2022Observed: 17.61 ft at 3:30AM May 10, 2022Observed: 17.62 ft at 4:00AM May 10, 2022Observed: 17.6 ft at 4:30AM May 10, 2022Observed: 17.58 ft at 5:00AM May 10, 2022Observed: 17.56 ft at 5:30AM May 10, 2022Observed: 17.48 ft at 6:00AM May 10, 2022Observed: 17.48 ft at 6:30AM May 10, 2022Observed: 17.49 ft at 7:00AM May 10, 2022Observed: 17.47 ft at 7:30AM May 10, 2022Observed: 17.41 ft at 8:00AM May 10, 2022Observed: 17.41 ft at 8:30AM May 10, 2022Observed: 17.42 ft at 9:00AM May 10, 2022Observed: 17.39 ft at 9:30AM May 10, 2022Observed: 17.37 ft at 10:00AM May 10, 2022Observed: 17.36 ft at 10:30AM May 10, 2022Observed: 17.28 ft at 11:00AM May 10, 2022Observed: 17.29 ft at 11:30AM May 10, 2022Observed: 17.31 ft at 12:00PM May 10, 2022Observed: 17.29 ft at 12:30PM May 10, 2022Observed: 17.28 ft at 1:00PM May 10, 2022Observed: 17.28 ft at 1:30PM May 10, 2022Observed: 17.26 ft at 2:00PM May 10, 2022Observed: 17.25 ft at 2:30PM May 10, 2022Observed: 17.22 ft at 3:00PM May 10, 2022Observed: 17.22 ft at 3:30PM May 10, 2022Observed: 17.2 ft at 4:00PM May 10, 2022Observed: 17.2 ft at 4:30PM May 10, 2022Observed: 17.18 ft at 5:00PM May 10, 2022Observed: 17.15 ft at 5:30PM May 10, 2022Observed: 17.13 ft at 6:00PM May 10, 2022Observed: 17.13 ft at 6:30PM May 10, 2022Observed: 17.11 ft at 7:00PM May 10, 2022Observed: 17.09 ft at 7:30PM May 10, 2022Observed: 17.08 ft at 8:00PM May 10, 2022Observed: 17.06 ft at 8:30PM May 10, 2022Observed: 17.05 ft at 9:00PM May 10, 2022Observed: 17.04 ft at 9:30PM May 10, 2022Observed: 16.98 ft at 10:00PM May 10, 2022Observed: 16.99 ft at 10:30PM May 10, 2022Observed: 16.99 ft at 11:00PM May 10, 2022Observed: 16.98 ft at 11:30PM May 10, 2022Observed: 16.96 ft at 12:00AM May 11, 2022Observed: 16.94 ft at 12:30AM May 11, 2022Observed: 16.93 ft at 1:00AM May 11, 2022Observed: 16.88 ft at 1:30AM May 11, 2022Observed: 16.89 ft at 2:00AM May 11, 2022Observed: 16.88 ft at 2:30AM May 11, 2022Observed: 16.86 ft at 3:00AM May 11, 2022Observed: 16.84 ft at 3:30AM May 11, 2022Observed: 16.82 ft at 4:00AM May 11, 2022Observed: 16.81 ft at 4:30AM May 11, 2022Observed: 16.8 ft at 5:00AM May 11, 2022Observed: 16.78 ft at 5:30AM May 11, 2022Observed: 16.77 ft at 6:00AM May 11, 2022Observed: 16.76 ft at 6:30AM May 11, 2022Observed: 16.74 ft at 7:00AM May 11, 2022Observed: 16.71 ft at 8:00AM May 11, 2022Observed: 16.69 ft at 8:30AM May 11, 2022Observed: 16.69 ft at 9:00AM May 11, 2022Observed: 16.67 ft at 9:30AM May 11, 2022Observed: 16.66 ft at 10:00AM May 11, 2022Observed: 16.56 ft at 10:30AM May 11, 2022Observed: 16.6 ft at 11:00AM May 11, 2022Observed: 16.58 ft at 11:30AM May 11, 2022Observed: 16.57 ft at 12:00PM May 11, 2022Observed: 16.56 ft at 12:30PM May 11, 2022Observed: 16.56 ft at 1:00PM May 11, 2022Observed: 16.53 ft at 1:30PM May 11, 2022Observed: 16.52 ft at 2:00PM May 11, 2022Observed: 16.5 ft at 2:30PM May 11, 2022Observed: 16.47 ft at 3:00PM May 11, 2022Observed: 16.46 ft at 3:30PM May 11, 2022Observed: 16.43 ft at 4:00PM May 11, 2022Observed: 16.43 ft at 4:30PM May 11, 2022Observed: 16.42 ft at 5:00PM May 11, 2022Observed: 16.4 ft at 5:30PM May 11, 2022Observed: 16.39 ft at 6:00PM May 11, 2022Observed: 16.36 ft at 6:30PM May 11, 2022Observed: 16.34 ft at 7:00PM May 11, 2022Observed: 16.33 ft at 7:30PM May 11, 2022Observed: 16.3 ft at 8:00PM May 11, 2022Observed: 16.27 ft at 8:30PM May 11, 2022Observed: 16.26 ft at 9:00PM May 11, 2022Observed: 16.2 ft at 9:30PM May 11, 2022Observed: 16.21 ft at 10:00PM May 11, 2022Observed: 16.2 ft at 10:30PM May 11, 2022Observed: 16.13 ft at 11:00PM May 11, 2022Observed: 16.13 ft at 11:30PM May 11, 2022Observed: 16.11 ft at 12:00AM May 12, 2022Observed: 16.11 ft at 12:30AM May 12, 2022Observed: 16.09 ft at 1:00AM May 12, 2022Observed: 16.06 ft at 1:30AM May 12, 2022Observed: 15.99 ft at 2:00AM May 12, 2022Observed: 15.99 ft at 2:30AM May 12, 2022Observed: 15.97 ft at 3:00AM May 12, 2022Observed: 15.95 ft at 3:30AM May 12, 2022Observed: 15.92 ft at 4:00AM May 12, 2022Observed: 15.9 ft at 4:30AM May 12, 2022Observed: 15.83 ft at 5:00AM May 12, 2022Observed: 15.83 ft at 5:30AM May 12, 2022Observed: 15.8 ft at 6:00AM May 12, 2022Observed: 15.79 ft at 6:30AM May 12, 2022Observed: 15.77 ft at 7:00AM May 12, 2022Observed: 15.75 ft at 7:30AM May 12, 2022Observed: 15.68 ft at 8:00AM May 12, 2022Observed: 15.67 ft at 8:30AM May 12, 2022Observed: 15.66 ft at 9:00AM May 12, 2022Observed: 15.64 ft at 9:30AM May 12, 2022Observed: 15.62 ft at 10:00AM May 12, 2022Observed: 15.59 ft at 10:30AM May 12, 2022Observed: 15.51 ft at 11:00AM May 12, 2022Observed: 15.52 ft at 11:30AM May 12, 2022Observed: 15.5 ft at 12:00PM May 12, 2022Observed: 15.48 ft at 12:30PM May 12, 2022Observed: 15.39 ft at 1:00PM May 12, 2022Observed: 15.4 ft at 1:30PM May 12, 2022Observed: 15.38 ft at 2:00PM May 12, 2022Observed: 15.35 ft at 2:30PM May 12, 2022Observed: 15.33 ft at 3:00PM May 12, 2022Observed: 15.32 ft at 3:30PM May 12, 2022Observed: 15.24 ft at 4:00PM May 12, 2022Observed: 15.23 ft at 4:30PM May 12, 2022Observed: 15.21 ft at 5:00PM May 12, 2022Observed: 15.2 ft at 5:30PM May 12, 2022Observed: 15.14 ft at 6:00PM May 12, 2022Observed: 15.12 ft at 6:30PM May 12, 2022Observed: 15.11 ft at 7:00PM May 12, 2022Observed: 15.08 ft at 7:30PM May 12, 2022Observed: 15.07 ft at 8:00PM May 12, 2022Observed: 14.99 ft at 8:30PM May 12, 2022Observed: 15 ft at 9:00PM May 12, 2022Observed: 14.97 ft at 9:30PM May 12, 2022Observed: 14.9 ft at 10:00PM May 12, 2022Observed: 14.89 ft at 10:30PM May 12, 2022Observed: 14.88 ft at 11:00PM May 12, 2022Observed: 14.86 ft at 11:30PM May 12, 2022Observed: 14.84 ft at 12:00AM May 13, 2022Observed: 14.83 ft at 12:30AM May 13, 2022Observed: 14.76 ft at 1:00AM May 13, 2022Observed: 14.76 ft at 1:30AM May 13, 2022Observed: 14.74 ft at 2:00AM May 13, 2022Observed: 14.73 ft at 2:30AM May 13, 2022Observed: 14.71 ft at 3:00AM May 13, 2022Observed: 14.65 ft at 3:30AM May 13, 2022Observed: 14.66 ft at 4:00AM May 13, 2022Observed: 14.64 ft at 4:30AM May 13, 2022Observed: 14.63 ft at 5:00AM May 13, 2022Observed: 14.56 ft at 5:30AM May 13, 2022Observed: 14.57 ft at 6:00AM May 13, 2022Observed: 14.56 ft at 6:30AM May 13, 2022Observed: 14.54 ft at 7:00AM May 13, 2022Observed: 14.53 ft at 7:30AM May 13, 2022Observed: 14.52 ft at 8:00AM May 13, 2022Observed: 14.46 ft at 8:30AM May 13, 2022Observed: 14.46 ft at 9:00AM May 13, 2022Observed: 14.47 ft at 9:30AM May 13, 2022Observed: 14.45 ft at 10:00AM May 13, 2022Observed: 14.44 ft at 10:30AM May 13, 2022Observed: 14.44 ft at 11:00AM May 13, 2022Observed: 14.41 ft at 11:30AM May 13, 2022Observed: 14.39 ft at 12:00PM May 13, 2022Observed: 14.37 ft at 12:30PM May 13, 2022Observed: 14.38 ft at 1:00PM May 13, 2022Observed: 14.4 ft at 1:30PM May 13, 2022Observed: 14.38 ft at 2:00PM May 13, 2022Observed: 14.39 ft at 2:30PM May 13, 2022Observed: 14.38 ft at 3:00PM May 13, 2022Observed: 14.37 ft at 3:30PM May 13, 2022Observed: 14.36 ft at 4:00PM May 13, 2022Observed: 14.38 ft at 4:30PM May 13, 2022Observed: 14.37 ft at 5:00PM May 13, 2022Observed: 14.38 ft at 5:30PM May 13, 2022Observed: 14.35 ft at 6:00PM May 13, 2022Observed: 14.35 ft at 6:30PM May 13, 2022Observed: 14.35 ft at 7:00PM May 13, 2022Observed: 14.34 ft at 7:30PM May 13, 2022Observed: 14.33 ft at 8:00PM May 13, 2022Observed: 14.32 ft at 8:30PM May 13, 2022Observed: 14.29 ft at 9:00PM May 13, 2022Observed: 14.3 ft at 9:30PM May 13, 2022Observed: 14.3 ft at 10:00PM May 13, 2022Observed: 14.3 ft at 10:30PM May 13, 2022Observed: 14.29 ft at 11:00PM May 13, 2022Observed: 14.3 ft at 11:30PM May 13, 2022Observed: 14.3 ft at 12:00AM May 14, 2022Observed: 14.29 ft at 12:30AM May 14, 2022Observed: 14.27 ft at 1:00AM May 14, 2022Observed: 14.26 ft at 1:30AM May 14, 2022Observed: 14.25 ft at 2:00AM May 14, 2022Observed: 14.23 ft at 2:30AM May 14, 2022Observed: 14.25 ft at 3:00AM May 14, 2022Observed: 14.25 ft at 3:30AM May 14, 2022Observed: 14.27 ft at 4:00AM May 14, 2022Observed: 14.27 ft at 4:30AM May 14, 2022Observed: 14.28 ft at 5:00AM May 14, 2022Observed: 14.3 ft at 5:30AM May 14, 2022Observed: 14.31 ft at 6:00AM May 14, 2022Observed: 14.31 ft at 6:30AM May 14, 2022Observed: 14.33 ft at 7:00AM May 14, 2022Observed: 14.31 ft at 7:30AM May 14, 2022Observed: 14.39 ft at 8:00AM May 14, 2022Observed: 14.4 ft at 8:30AM May 14, 2022Observed: 14.41 ft at 9:00AM May 14, 2022Observed: 14.4 ft at 9:30AM May 14, 2022Observed: 14.4 ft at 10:00AM May 14, 2022Observed: 14.4 ft at 10:30AM May 14, 2022Observed: 14.41 ft at 11:00AM May 14, 2022Observed: 14.41 ft at 11:30AM May 14, 2022Observed: 14.42 ft at 12:00PM May 14, 2022Observed: 14.41 ft at 12:30PM May 14, 2022Observed: 14.43 ft at 1:00PM May 14, 2022Observed: 14.43 ft at 1:30PM May 14, 2022Observed: 14.42 ft at 2:00PM May 14, 2022Observed: 14.39 ft at 2:30PM May 14, 2022Observed: 14.41 ft at 3:00PM May 14, 2022Observed: 14.41 ft at 3:30PM May 14, 2022Observed: 14.39 ft at 4:00PM May 14, 2022Observed: 14.4 ft at 4:30PM May 14, 2022Observed: 14.41 ft at 5:00PM May 14, 2022Observed: 14.42 ft at 5:30PM May 14, 2022Observed: 14.41 ft at 6:00PM May 14, 2022Observed: 14.43 ft at 6:30PM May 14, 2022Observed: 14.43 ft at 7:00PM May 14, 2022Observed: 14.43 ft at 7:30PM May 14, 2022Observed: 14.44 ft at 8:00PM May 14, 2022Observed: 14.42 ft at 8:30PM May 14, 2022Observed: 14.41 ft at 9:00PM May 14, 2022Observed: 14.42 ft at 9:30PM May 14, 2022Observed: 14.43 ft at 10:00PM May 14, 2022Observed: 14.41 ft at 10:30PM May 14, 2022Observed: 14.43 ft at 11:00PM May 14, 2022Observed: 14.43 ft at 11:30PM May 14, 2022Observed: 14.43 ft at 12:00AM May 15, 2022Observed: 14.41 ft at 12:30AM May 15, 2022Observed: 14.42 ft at 1:00AM May 15, 2022Observed: 14.42 ft at 1:30AM May 15, 2022Observed: 14.41 ft at 2:00AM May 15, 2022Observed: 14.39 ft at 2:30AM May 15, 2022Observed: 14.28 ft at 3:00AM May 15, 2022Observed: 14.36 ft at 3:30AM May 15, 2022Observed: 14.37 ft at 4:00AM May 15, 2022Observed: 14.38 ft at 4:30AM May 15, 2022Observed: 14.36 ft at 5:00AM May 15, 2022Observed: 14.36 ft at 5:30AM May 15, 2022Observed: 14.37 ft at 6:00AM May 15, 2022Observed: 14.35 ft at 6:30AM May 15, 2022Observed: 14.34 ft at 7:00AM May 15, 2022Observed: 14.37 ft at 7:30AM May 15, 2022Observed: 14.34 ft at 8:00AM May 15, 2022Observed: 14.35 ft at 8:30AM May 15, 2022Observed: 14.34 ft at 9:00AM May 15, 2022Observed: 14.33 ft at 9:30AM May 15, 2022Observed: 14.33 ft at 10:00AM May 15, 2022Observed: 14.33 ft at 10:30AM May 15, 2022Observed: 14.34 ft at 11:00AM May 15, 2022Observed: 14.34 ft at 11:30AM May 15, 2022Observed: 14.33 ft at 12:00PM May 15, 2022Observed: 14.34 ft at 12:30PM May 15, 2022Observed: 14.35 ft at 1:00PM May 15, 2022Observed: 14.36 ft at 1:30PM May 15, 2022Observed: 14.31 ft at 2:00PM May 15, 2022Observed: 14.3 ft at 2:30PM May 15, 2022Observed: 14.31 ft at 3:00PM May 15, 2022Observed: 14.31 ft at 3:30PM May 15, 2022Observed: 14.31 ft at 4:00PM May 15, 2022Observed: 14.29 ft at 4:30PM May 15, 2022Observed: 14.31 ft at 5:00PM May 15, 2022Observed: 14.29 ft at 5:30PM May 15, 2022Observed: 14.28 ft at 6:00PM May 15, 2022Observed: 14.29 ft at 6:30PM May 15, 2022Observed: 14.28 ft at 7:00PM May 15, 2022Observed: 14.29 ft at 7:30PM May 15, 2022Observed: 14.35 ft at 8:00PM May 15, 2022Observed: 14.34 ft at 8:30PM May 15, 2022Observed: 14.32 ft at 9:00PM May 15, 2022Observed: 14.32 ft at 9:30PM May 15, 2022Observed: 14.32 ft at 10:00PM May 15, 2022Observed: 14.34 ft at 10:30PM May 15, 2022Observed: 14.32 ft at 11:00PM May 15, 2022Observed: 14.31 ft at 11:30PM May 15, 2022Observed: 14.23 ft at 12:00AM May 16, 2022Observed: 14.3 ft at 12:30AM May 16, 2022Observed: 14.3 ft at 1:00AM May 16, 2022Observed: 14.31 ft at 1:30AM May 16, 2022Observed: 14.3 ft at 2:00AM May 16, 2022Observed: 14.31 ft at 2:30AM May 16, 2022Observed: 14.32 ft at 3:00AM May 16, 2022Observed: 14.33 ft at 3:30AM May 16, 2022Observed: 14.31 ft at 4:00AM May 16, 2022Observed: 14.31 ft at 4:30AM May 16, 2022Observed: 14.31 ft at 5:00AM May 16, 2022Observed: 14.31 ft at 5:30AM May 16, 2022Observed: 14.31 ft at 6:00AM May 16, 2022Observed: 14.29 ft at 6:30AM May 16, 2022Observed: 14.28 ft at 7:00AM May 16, 2022Observed: 14.29 ft at 7:30AM May 16, 2022Observed: 14.29 ft at 8:00AM May 16, 2022Observed: 14.28 ft at 8:30AM May 16, 2022Observed: 14.28 ft at 9:00AM May 16, 2022Observed: 14.25 ft at 10:30AM May 16, 2022Observed: 14.23 ft at 11:00AM May 16, 2022Observed: 14.22 ft at 11:30AM May 16, 2022Observed: 14.21 ft at 12:00PM May 16, 2022Observed: 14.2 ft at 12:30PM May 16, 2022Observed: 14.2 ft at 1:00PM May 16, 2022Observed: 14.2 ft at 1:30PM May 16, 2022Observed: 14.21 ft at 2:00PM May 16, 2022Observed: 14.22 ft at 2:30PM May 16, 2022Observed: 14.21 ft at 3:00PM May 16, 2022Observed: 14.21 ft at 3:30PM May 16, 2022Observed: 14.29 ft at 4:00PM May 16, 2022Observed: 14.28 ft at 4:30PM May 16, 2022Observed: 14.29 ft at 5:00PM May 16, 2022Observed: 14.31 ft at 5:30PM May 16, 2022Observed: 14.32 ft at 6:00PM May 16, 2022Observed: 14.32 ft at 6:30PM May 16, 2022Observed: 14.32 ft at 7:00PM May 16, 2022Observed: 14.32 ft at 7:30PM May 16, 2022Observed: 14.32 ft at 8:00PM May 16, 2022Observed: 14.31 ft at 8:30PM May 16, 2022Observed: 14.31 ft at 9:00PM May 16, 2022Observed: 14.29 ft at 9:30PM May 16, 2022Observed: 14.29 ft at 10:00PM May 16, 2022Observed: 14.29 ft at 10:30PM May 16, 2022Observed: 14.28 ft at 11:00PM May 16, 2022Observed: 14.28 ft at 11:30PM May 16, 2022Observed: 14.3 ft at 12:00AM May 17, 2022Observed: 14.33 ft at 12:30AM May 17, 2022Observed: 14.35 ft at 1:00AM May 17, 2022Observed: 14.36 ft at 1:30AM May 17, 2022Observed: 14.38 ft at 2:00AM May 17, 2022Observed: 14.4 ft at 2:30AM May 17, 2022Observed: 14.43 ft at 3:00AM May 17, 2022Observed: 14.42 ft at 3:30AM May 17, 2022Observed: 14.42 ft at 4:00AM May 17, 2022Observed: 14.42 ft at 4:30AM May 17, 2022Observed: 14.4 ft at 5:00AM May 17, 2022Observed: 14.4 ft at 5:30AM May 17, 2022Observed: 14.4 ft at 6:00AM May 17, 2022Observed: 14.4 ft at 6:30AM May 17, 2022USGS--Water Resources of the United StatesALOI2(plotting HGIRG) Graph Created (6:55AM May 17, 2022)ObservedLatest observed value: 14.4 ft at 6:30 AM CDT 17-May-2022. Flood Stage is 21 ft
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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.
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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.

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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
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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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