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Hydrograph River at a Glance Download
Big Sioux River above Hawarden Stage (ft)Flow (cfs)Highest Observation: 17.12 ft at 7:00PM May 17, 2022Highest Observation: 17.12 ft at 7:01PM May 17, 2022Observed: 17.1 ft at 7:15PM May 17, 2022Observed: 17.1 ft at 7:16PM May 17, 2022Observed: 17.11 ft at 7:30PM May 17, 2022Observed: 17.1 ft at 7:45PM May 17, 2022Observed: 17.11 ft at 8:00PM May 17, 2022Observed: 17.1 ft at 8:15PM May 17, 2022Observed: 17.08 ft at 8:30PM May 17, 2022Observed: 17.08 ft at 8:45PM May 17, 2022Observed: 17.08 ft at 9:00PM May 17, 2022Observed: 17.06 ft at 9:15PM May 17, 2022Observed: 17.07 ft at 9:30PM May 17, 2022Observed: 17.07 ft at 9:45PM May 17, 2022Observed: 17.05 ft at 10:00PM May 17, 2022Observed: 17.04 ft at 10:15PM May 17, 2022Observed: 17.04 ft at 10:30PM May 17, 2022Observed: 17.03 ft at 10:45PM May 17, 2022Observed: 17.03 ft at 11:00PM May 17, 2022Observed: 17.04 ft at 11:15PM May 17, 2022Observed: 17.03 ft at 11:30PM May 17, 2022Observed: 17.01 ft at 11:45PM May 17, 2022Observed: 17.03 ft at 12:00AM May 18, 2022Observed: 17.01 ft at 12:15AM May 18, 2022Observed: 17 ft at 12:30AM May 18, 2022Observed: 17 ft at 12:45AM May 18, 2022Observed: 16.98 ft at 1:00AM May 18, 2022Observed: 16.99 ft at 1:15AM May 18, 2022Observed: 16.98 ft at 1:30AM May 18, 2022Observed: 16.98 ft at 1:45AM May 18, 2022Observed: 16.97 ft at 2:00AM May 18, 2022Observed: 16.95 ft at 2:15AM May 18, 2022Observed: 16.96 ft at 2:30AM May 18, 2022Observed: 16.98 ft at 2:45AM May 18, 2022Observed: 16.98 ft at 2:46AM May 18, 2022Observed: 16.94 ft at 3:00AM May 18, 2022Observed: 16.94 ft at 3:01AM May 18, 2022Observed: 16.93 ft at 3:15AM May 18, 2022Observed: 16.93 ft at 3:16AM May 18, 2022Observed: 16.94 ft at 3:30AM May 18, 2022Observed: 16.93 ft at 3:45AM May 18, 2022Observed: 16.93 ft at 4:00AM May 18, 2022Observed: 16.92 ft at 4:15AM May 18, 2022Observed: 16.9 ft at 4:30AM May 18, 2022Observed: 16.9 ft at 4:45AM May 18, 2022Observed: 16.9 ft at 5:00AM May 18, 2022Observed: 16.9 ft at 5:15AM May 18, 2022Observed: 16.88 ft at 5:30AM May 18, 2022Observed: 16.87 ft at 5:45AM May 18, 2022Observed: 16.88 ft at 6:00AM May 18, 2022Observed: 16.87 ft at 6:15AM May 18, 2022Observed: 16.85 ft at 6:30AM May 18, 2022Observed: 16.85 ft at 6:45AM May 18, 2022Observed: 16.84 ft at 7:00AM May 18, 2022Observed: 16.85 ft at 7:15AM May 18, 2022Observed: 16.84 ft at 7:30AM May 18, 2022Observed: 16.84 ft at 7:45AM May 18, 2022Observed: 16.84 ft at 8:00AM May 18, 2022Observed: 16.84 ft at 8:15AM May 18, 2022Observed: 16.82 ft at 8:30AM May 18, 2022Observed: 16.81 ft at 9:45AM May 18, 2022Observed: 16.81 ft at 10:00AM May 18, 2022Observed: 16.79 ft at 10:15AM May 18, 2022Observed: 16.8 ft at 10:30AM May 18, 2022Observed: 16.79 ft at 10:45AM May 18, 2022Observed: 16.79 ft at 10:46AM May 18, 2022Observed: 16.8 ft at 11:00AM May 18, 2022Observed: 16.8 ft at 11:01AM May 18, 2022Observed: 16.8 ft at 11:15AM May 18, 2022Observed: 16.8 ft at 11:16AM May 18, 2022Observed: 16.77 ft at 11:30AM May 18, 2022Observed: 16.78 ft at 11:45AM May 18, 2022Observed: 16.76 ft at 12:00PM May 18, 2022Observed: 16.77 ft at 12:15PM May 18, 2022Observed: 16.76 ft at 12:30PM May 18, 2022Observed: 16.77 ft at 12:45PM May 18, 2022Observed: 16.77 ft at 1:00PM May 18, 2022Observed: 16.75 ft at 1:15PM May 18, 2022Observed: 16.75 ft at 1:30PM May 18, 2022Observed: 16.75 ft at 1:45PM May 18, 2022Observed: 16.74 ft at 2:00PM May 18, 2022Observed: 16.73 ft at 2:15PM May 18, 2022Observed: 16.73 ft at 2:30PM May 18, 2022Observed: 16.72 ft at 2:45PM May 18, 2022Observed: 16.72 ft at 3:00PM May 18, 2022Observed: 16.7 ft at 3:15PM May 18, 2022Observed: 16.7 ft at 3:30PM May 18, 2022Observed: 16.7 ft at 3:45PM May 18, 2022Observed: 16.7 ft at 4:00PM May 18, 2022Observed: 16.67 ft at 4:15PM May 18, 2022Observed: 16.68 ft at 4:30PM May 18, 2022Observed: 16.67 ft at 4:45PM May 18, 2022Observed: 16.68 ft at 5:00PM May 18, 2022Observed: 16.68 ft at 5:15PM May 18, 2022Observed: 16.66 ft at 5:30PM May 18, 2022Observed: 16.66 ft at 5:45PM May 18, 2022Observed: 16.66 ft at 6:00PM May 18, 2022Observed: 16.65 ft at 6:15PM May 18, 2022Observed: 16.65 ft at 6:30PM May 18, 2022Observed: 16.65 ft at 6:45PM May 18, 2022Observed: 16.65 ft at 6:46PM May 18, 2022Observed: 16.65 ft at 7:00PM May 18, 2022Observed: 16.65 ft at 7:01PM May 18, 2022Observed: 16.64 ft at 7:15PM May 18, 2022Observed: 16.64 ft at 7:16PM May 18, 2022Observed: 16.63 ft at 7:30PM May 18, 2022Observed: 16.63 ft at 7:45PM May 18, 2022Observed: 16.64 ft at 8:00PM May 18, 2022Observed: 16.6 ft at 8:15PM May 18, 2022Observed: 16.61 ft at 8:30PM May 18, 2022Observed: 16.61 ft at 8:45PM May 18, 2022Observed: 16.6 ft at 9:00PM May 18, 2022Observed: 16.62 ft at 9:15PM May 18, 2022Observed: 16.6 ft at 9:30PM May 18, 2022Observed: 16.59 ft at 9:45PM May 18, 2022Observed: 16.59 ft at 10:00PM May 18, 2022Observed: 16.59 ft at 10:15PM May 18, 2022Observed: 16.58 ft at 10:30PM May 18, 2022Observed: 16.57 ft at 10:45PM May 18, 2022Observed: 16.57 ft at 11:00PM May 18, 2022Observed: 16.58 ft at 11:15PM May 18, 2022Observed: 16.58 ft at 11:30PM May 18, 2022Observed: 16.56 ft at 11:45PM May 18, 2022Observed: 16.55 ft at 12:00AM May 19, 2022Observed: 16.55 ft at 12:15AM May 19, 2022Observed: 16.56 ft at 12:30AM May 19, 2022Observed: 16.55 ft at 12:45AM May 19, 2022Observed: 16.54 ft at 1:00AM May 19, 2022Observed: 16.56 ft at 1:15AM May 19, 2022Observed: 16.54 ft at 1:30AM May 19, 2022Observed: 16.54 ft at 1:45AM May 19, 2022Observed: 16.54 ft at 2:00AM May 19, 2022Observed: 16.53 ft at 2:15AM May 19, 2022Observed: 16.53 ft at 2:30AM May 19, 2022Observed: 16.52 ft at 2:45AM May 19, 2022Observed: 16.52 ft at 2:47AM May 19, 2022Observed: 16.52 ft at 3:00AM May 19, 2022Observed: 16.52 ft at 3:02AM May 19, 2022Observed: 16.53 ft at 3:15AM May 19, 2022Observed: 16.53 ft at 3:17AM May 19, 2022Observed: 16.51 ft at 3:30AM May 19, 2022Observed: 16.51 ft at 3:45AM May 19, 2022Observed: 16.5 ft at 4:00AM May 19, 2022Observed: 16.49 ft at 4:15AM May 19, 2022Observed: 16.49 ft at 4:30AM May 19, 2022Observed: 16.5 ft at 4:45AM May 19, 2022Observed: 16.48 ft at 5:00AM May 19, 2022Observed: 16.47 ft at 5:15AM May 19, 2022Observed: 16.49 ft at 5:30AM May 19, 2022Observed: 16.48 ft at 5:45AM May 19, 2022Observed: 16.47 ft at 6:00AM May 19, 2022Observed: 16.48 ft at 6:15AM May 19, 2022Observed: 16.48 ft at 6:30AM May 19, 2022Observed: 16.46 ft at 6:45AM May 19, 2022Observed: 16.47 ft at 7:00AM May 19, 2022Observed: 16.44 ft at 7:15AM May 19, 2022Observed: 16.45 ft at 7:30AM May 19, 2022Observed: 16.46 ft at 7:45AM May 19, 2022Observed: 16.45 ft at 8:00AM May 19, 2022Observed: 16.44 ft at 8:15AM May 19, 2022Observed: 16.43 ft at 8:30AM May 19, 2022Observed: 16.43 ft at 8:45AM May 19, 2022Observed: 16.43 ft at 9:00AM May 19, 2022Observed: 16.42 ft at 9:15AM May 19, 2022Observed: 16.43 ft at 9:30AM May 19, 2022Observed: 16.41 ft at 9:45AM May 19, 2022Observed: 16.42 ft at 10:00AM May 19, 2022Observed: 16.42 ft at 10:15AM May 19, 2022Observed: 16.41 ft at 10:30AM May 19, 2022Observed: 16.41 ft at 10:45AM May 19, 2022Observed: 16.41 ft at 10:47AM May 19, 2022Observed: 16.4 ft at 11:00AM May 19, 2022Observed: 16.4 ft at 11:02AM May 19, 2022Observed: 16.4 ft at 11:15AM May 19, 2022Observed: 16.4 ft at 11:17AM May 19, 2022Observed: 16.4 ft at 11:30AM May 19, 2022Observed: 16.38 ft at 11:45AM May 19, 2022Observed: 16.38 ft at 12:00PM May 19, 2022Observed: 16.37 ft at 12:15PM May 19, 2022Observed: 16.37 ft at 12:30PM May 19, 2022Observed: 16.36 ft at 12:45PM May 19, 2022Observed: 16.37 ft at 1:00PM May 19, 2022Observed: 16.39 ft at 1:15PM May 19, 2022Observed: 16.37 ft at 1:30PM May 19, 2022Observed: 16.36 ft at 1:45PM May 19, 2022Observed: 16.34 ft at 2:00PM May 19, 2022Observed: 16.36 ft at 2:15PM May 19, 2022Observed: 16.37 ft at 2:30PM May 19, 2022Observed: 16.35 ft at 2:45PM May 19, 2022Observed: 16.36 ft at 3:00PM May 19, 2022Observed: 16.37 ft at 3:15PM May 19, 2022Observed: 16.35 ft at 3:30PM May 19, 2022Observed: 16.35 ft at 3:45PM May 19, 2022Observed: 16.35 ft at 4:00PM May 19, 2022Observed: 16.34 ft at 4:15PM May 19, 2022Observed: 16.36 ft at 4:30PM May 19, 2022Observed: 16.34 ft at 4:45PM May 19, 2022Observed: 16.34 ft at 5:00PM May 19, 2022Observed: 16.32 ft at 5:15PM May 19, 2022Observed: 16.34 ft at 5:30PM May 19, 2022Observed: 16.33 ft at 5:45PM May 19, 2022Observed: 16.33 ft at 6:00PM May 19, 2022Observed: 16.33 ft at 6:15PM May 19, 2022Observed: 16.32 ft at 6:30PM May 19, 2022Observed: 16.32 ft at 6:45PM May 19, 2022Observed: 16.32 ft at 6:47PM May 19, 2022Observed: 16.32 ft at 7:00PM May 19, 2022Observed: 16.32 ft at 7:02PM May 19, 2022Observed: 16.32 ft at 7:15PM May 19, 2022Observed: 16.32 ft at 7:17PM May 19, 2022Observed: 16.32 ft at 7:30PM May 19, 2022Observed: 16.31 ft at 7:45PM May 19, 2022Observed: 16.31 ft at 8:00PM May 19, 2022Observed: 16.31 ft at 8:15PM May 19, 2022Observed: 16.3 ft at 8:30PM May 19, 2022Observed: 16.31 ft at 8:45PM May 19, 2022Observed: 16.29 ft at 9:00PM May 19, 2022Observed: 16.28 ft at 9:15PM May 19, 2022Observed: 16.28 ft at 9:30PM May 19, 2022Observed: 16.29 ft at 9:45PM May 19, 2022Observed: 16.29 ft at 10:00PM May 19, 2022Observed: 16.29 ft at 10:15PM May 19, 2022Observed: 16.28 ft at 10:30PM May 19, 2022Observed: 16.28 ft at 10:45PM May 19, 2022Observed: 16.25 ft at 11:00PM May 19, 2022Observed: 16.26 ft at 11:15PM May 19, 2022Observed: 16.27 ft at 11:30PM May 19, 2022Observed: 16.23 ft at 11:45PM May 19, 2022Observed: 16.25 ft at 12:00AM May 20, 2022Observed: 16.23 ft at 12:15AM May 20, 2022Observed: 16.26 ft at 12:30AM May 20, 2022Observed: 16.24 ft at 12:45AM May 20, 2022Observed: 16.24 ft at 1:00AM May 20, 2022Observed: 16.24 ft at 1:15AM May 20, 2022Observed: 16.25 ft at 1:30AM May 20, 2022Observed: 16.25 ft at 1:45AM May 20, 2022Observed: 16.22 ft at 2:00AM May 20, 2022Observed: 16.23 ft at 2:15AM May 20, 2022Observed: 16.23 ft at 2:30AM May 20, 2022Observed: 16.23 ft at 2:45AM May 20, 2022Observed: 16.23 ft at 3:00AM May 20, 2022Observed: 16.23 ft at 3:01AM May 20, 2022Observed: 16.21 ft at 3:15AM May 20, 2022Observed: 16.21 ft at 3:16AM May 20, 2022Observed: 16.22 ft at 3:30AM May 20, 2022Observed: 16.22 ft at 3:31AM May 20, 2022Observed: 16.22 ft at 3:45AM May 20, 2022Observed: 16.23 ft at 4:00AM May 20, 2022Observed: 16.21 ft at 4:15AM May 20, 2022Observed: 16.21 ft at 4:30AM May 20, 2022Observed: 16.2 ft at 4:45AM May 20, 2022Observed: 16.2 ft at 5:00AM May 20, 2022Observed: 16.19 ft at 5:15AM May 20, 2022Observed: 16.19 ft at 5:30AM May 20, 2022Observed: 16.2 ft at 5:45AM May 20, 2022Observed: 16.2 ft at 6:00AM May 20, 2022Observed: 16.19 ft at 6:15AM May 20, 2022Observed: 16.2 ft at 6:30AM May 20, 2022Observed: 16.19 ft at 6:45AM May 20, 2022Observed: 16.18 ft at 7:00AM May 20, 2022Observed: 16.18 ft at 7:15AM May 20, 2022Observed: 16.18 ft at 7:30AM May 20, 2022Observed: 16.17 ft at 7:45AM May 20, 2022Observed: 16.18 ft at 8:00AM May 20, 2022Observed: 16.17 ft at 8:15AM May 20, 2022Observed: 16.18 ft at 8:30AM May 20, 2022Observed: 16.15 ft at 8:45AM May 20, 2022Observed: 16.16 ft at 9:00AM May 20, 2022Observed: 16.16 ft at 9:15AM May 20, 2022Observed: 16.17 ft at 9:30AM May 20, 2022Observed: 16.16 ft at 9:45AM May 20, 2022Observed: 16.15 ft at 10:00AM May 20, 2022Observed: 16.17 ft at 10:15AM May 20, 2022Observed: 16.16 ft at 10:30AM May 20, 2022Observed: 16.13 ft at 10:45AM May 20, 2022Observed: 16.15 ft at 11:00AM May 20, 2022Observed: 16.15 ft at 11:01AM May 20, 2022Observed: 16.15 ft at 11:15AM May 20, 2022Observed: 16.15 ft at 11:16AM May 20, 2022Observed: 16.15 ft at 11:30AM May 20, 2022Observed: 16.15 ft at 11:31AM May 20, 2022Observed: 16.15 ft at 11:45AM May 20, 2022Observed: 16.14 ft at 12:00PM May 20, 2022Observed: 16.14 ft at 12:15PM May 20, 2022Observed: 16.15 ft at 12:30PM May 20, 2022Observed: 16.14 ft at 12:45PM May 20, 2022Observed: 16.14 ft at 1:00PM May 20, 2022Observed: 16.13 ft at 1:15PM May 20, 2022Observed: 16.13 ft at 1:30PM May 20, 2022Observed: 16.13 ft at 1:45PM May 20, 2022Observed: 16.14 ft at 2:00PM May 20, 2022Observed: 16.13 ft at 2:15PM May 20, 2022Observed: 16.14 ft at 2:30PM May 20, 2022Observed: 16.15 ft at 2:45PM May 20, 2022Observed: 16.14 ft at 3:00PM May 20, 2022Observed: 16.14 ft at 3:15PM May 20, 2022Observed: 16.13 ft at 3:30PM May 20, 2022Observed: 16.13 ft at 3:45PM May 20, 2022Observed: 16.13 ft at 4:00PM May 20, 2022Observed: 16.12 ft at 4:15PM May 20, 2022Observed: 16.13 ft at 4:30PM May 20, 2022Observed: 16.12 ft at 4:45PM May 20, 2022Observed: 16.12 ft at 5:00PM May 20, 2022Observed: 16.11 ft at 5:15PM May 20, 2022Observed: 16.12 ft at 5:30PM May 20, 2022Observed: 16.11 ft at 5:45PM May 20, 2022Observed: 16.11 ft at 6:00PM May 20, 2022Observed: 16.1 ft at 6:15PM May 20, 2022Observed: 16.08 ft at 6:30PM May 20, 2022Observed: 16.09 ft at 6:45PM May 20, 2022Observed: 16.09 ft at 7:00PM May 20, 2022Observed: 16.09 ft at 7:02PM May 20, 2022Observed: 16.1 ft at 7:15PM May 20, 2022Observed: 16.1 ft at 7:17PM May 20, 2022Observed: 16.08 ft at 7:30PM May 20, 2022Observed: 16.08 ft at 7:32PM May 20, 2022Observed: 16.08 ft at 7:45PM May 20, 2022Observed: 16.08 ft at 8:00PM May 20, 2022Observed: 16.07 ft at 8:15PM May 20, 2022Observed: 16.08 ft at 8:30PM May 20, 2022Observed: 16.05 ft at 10:45PM May 20, 2022Observed: 16.04 ft at 11:00PM May 20, 2022Observed: 16.06 ft at 11:15PM May 20, 2022Observed: 16.05 ft at 11:30PM May 20, 2022Observed: 16.05 ft at 11:45PM May 20, 2022Observed: 16.04 ft at 12:00AM May 21, 2022Observed: 16.04 ft at 12:15AM May 21, 2022Observed: 16.04 ft at 12:30AM May 21, 2022Observed: 16.06 ft at 12:45AM May 21, 2022Observed: 16.04 ft at 1:00AM May 21, 2022Observed: 16.03 ft at 1:15AM May 21, 2022Observed: 16.05 ft at 1:30AM May 21, 2022Observed: 16.05 ft at 1:45AM May 21, 2022Observed: 16.06 ft at 2:00AM May 21, 2022Observed: 16.03 ft at 2:15AM May 21, 2022Observed: 16.03 ft at 2:30AM May 21, 2022Observed: 16.04 ft at 2:45AM May 21, 2022Observed: 16.02 ft at 3:00AM May 21, 2022Observed: 16.02 ft at 3:02AM May 21, 2022Observed: 16.04 ft at 3:15AM May 21, 2022Observed: 16.04 ft at 3:17AM May 21, 2022Observed: 16.02 ft at 3:30AM May 21, 2022Observed: 16.02 ft at 3:32AM May 21, 2022Observed: 16.01 ft at 3:45AM May 21, 2022Observed: 16.01 ft at 4:00AM May 21, 2022Observed: 16.02 ft at 4:15AM May 21, 2022Observed: 16.02 ft at 4:30AM May 21, 2022Observed: 16.02 ft at 4:45AM May 21, 2022Observed: 16.02 ft at 5:00AM May 21, 2022Observed: 16.02 ft at 5:15AM May 21, 2022Observed: 16.02 ft at 5:30AM May 21, 2022Observed: 16 ft at 5:45AM May 21, 2022Observed: 16.01 ft at 6:00AM May 21, 2022Observed: 16.02 ft at 6:15AM May 21, 2022Observed: 16.01 ft at 6:30AM May 21, 2022Observed: 16.01 ft at 6:45AM May 21, 2022Observed: 16.01 ft at 7:00AM May 21, 2022Observed: 16 ft at 7:15AM May 21, 2022Observed: 16 ft at 7:30AM May 21, 2022Observed: 15.99 ft at 7:45AM May 21, 2022Observed: 16 ft at 8:00AM May 21, 2022Observed: 15.98 ft at 8:15AM May 21, 2022Observed: 16 ft at 8:30AM May 21, 2022Observed: 15.99 ft at 8:45AM May 21, 2022Observed: 15.99 ft at 9:00AM May 21, 2022Observed: 16 ft at 9:15AM May 21, 2022Observed: 15.99 ft at 9:30AM May 21, 2022Observed: 15.98 ft at 9:45AM May 21, 2022Observed: 15.99 ft at 10:00AM May 21, 2022Observed: 15.98 ft at 10:15AM May 21, 2022Observed: 15.98 ft at 10:30AM May 21, 2022Observed: 15.99 ft at 10:45AM May 21, 2022Observed: 15.98 ft at 11:00AM May 21, 2022Observed: 15.98 ft at 11:01AM May 21, 2022Observed: 16 ft at 11:15AM May 21, 2022Observed: 16 ft at 11:16AM May 21, 2022Observed: 15.99 ft at 11:30AM May 21, 2022Observed: 15.99 ft at 11:31AM May 21, 2022Observed: 15.96 ft at 11:45AM May 21, 2022Observed: 15.99 ft at 12:00PM May 21, 2022Observed: 15.97 ft at 12:15PM May 21, 2022Observed: 15.97 ft at 12:30PM May 21, 2022Observed: 15.97 ft at 12:45PM May 21, 2022Observed: 15.97 ft at 1:00PM May 21, 2022Observed: 15.97 ft at 1:15PM May 21, 2022Observed: 15.97 ft at 1:30PM May 21, 2022Observed: 15.97 ft at 1:45PM May 21, 2022Observed: 15.96 ft at 2:00PM May 21, 2022Observed: 15.97 ft at 2:15PM May 21, 2022Observed: 15.95 ft at 2:30PM May 21, 2022Observed: 15.95 ft at 2:45PM May 21, 2022Observed: 15.95 ft at 3:00PM May 21, 2022Observed: 15.94 ft at 3:15PM May 21, 2022Observed: 15.94 ft at 3:30PM May 21, 2022Observed: 15.96 ft at 3:45PM May 21, 2022Observed: 15.94 ft at 4:00PM May 21, 2022Observed: 15.93 ft at 4:15PM May 21, 2022Observed: 15.93 ft at 4:30PM May 21, 2022Observed: 15.93 ft at 4:45PM May 21, 2022Observed: 15.92 ft at 5:00PM May 21, 2022Observed: 15.94 ft at 5:15PM May 21, 2022Observed: 15.94 ft at 5:30PM May 21, 2022Observed: 15.93 ft at 5:45PM May 21, 2022Observed: 15.93 ft at 6:00PM May 21, 2022Observed: 15.93 ft at 6:15PM May 21, 2022Observed: 15.92 ft at 6:30PM May 21, 2022Observed: 15.92 ft at 6:45PM May 21, 2022Observed: 15.92 ft at 7:00PM May 21, 2022Observed: 15.91 ft at 7:15PM May 21, 2022Observed: 15.91 ft at 7:30PM May 21, 2022Observed: 15.92 ft at 7:45PM May 21, 2022Observed: 15.92 ft at 8:00PM May 21, 2022Observed: 15.91 ft at 8:15PM May 21, 2022Observed: 15.9 ft at 8:30PM May 21, 2022Observed: 15.91 ft at 8:45PM May 21, 2022Observed: 15.9 ft at 9:00PM May 21, 2022Observed: 15.92 ft at 9:15PM May 21, 2022Observed: 15.89 ft at 9:30PM May 21, 2022Observed: 15.89 ft at 9:45PM May 21, 2022Observed: 15.9 ft at 10:00PM May 21, 2022Observed: 15.89 ft at 10:15PM May 21, 2022Observed: 15.88 ft at 10:30PM May 21, 2022Observed: 15.89 ft at 10:45PM May 21, 2022Observed: 15.87 ft at 11:00PM May 21, 2022Observed: 15.87 ft at 11:15PM May 21, 2022Observed: 15.87 ft at 11:30PM May 21, 2022Observed: 15.88 ft at 11:45PM May 21, 2022Observed: 15.87 ft at 12:00AM May 22, 2022Observed: 15.88 ft at 12:15AM May 22, 2022Observed: 15.88 ft at 12:30AM May 22, 2022Observed: 15.88 ft at 12:45AM May 22, 2022Observed: 15.87 ft at 1:00AM May 22, 2022Observed: 15.85 ft at 1:15AM May 22, 2022Observed: 15.86 ft at 1:30AM May 22, 2022Observed: 15.85 ft at 1:45AM May 22, 2022Observed: 15.86 ft at 2:00AM May 22, 2022Observed: 15.85 ft at 2:15AM May 22, 2022Observed: 15.84 ft at 2:30AM May 22, 2022Observed: 15.84 ft at 2:45AM May 22, 2022Observed: 15.84 ft at 3:00AM May 22, 2022Observed: 15.84 ft at 3:15AM May 22, 2022Observed: 15.84 ft at 3:30AM May 22, 2022Observed: 15.84 ft at 3:45AM May 22, 2022Observed: 15.83 ft at 4:00AM May 22, 2022Observed: 15.83 ft at 4:15AM May 22, 2022Observed: 15.82 ft at 4:30AM May 22, 2022Observed: 15.82 ft at 4:45AM May 22, 2022Observed: 15.83 ft at 5:00AM May 22, 2022Observed: 15.82 ft at 5:15AM May 22, 2022Observed: 15.82 ft at 5:30AM May 22, 2022Observed: 15.82 ft at 5:45AM May 22, 2022Observed: 15.82 ft at 6:00AM May 22, 2022Observed: 15.81 ft at 6:15AM May 22, 2022Observed: 15.83 ft at 6:30AM May 22, 2022Observed: 15.81 ft at 6:45AM May 22, 2022Observed: 15.81 ft at 7:00AM May 22, 2022Observed: 15.8 ft at 7:15AM May 22, 2022Observed: 15.82 ft at 7:30AM May 22, 2022Observed: 15.82 ft at 7:45AM May 22, 2022Observed: 15.82 ft at 8:00AM May 22, 2022Observed: 15.82 ft at 8:15AM May 22, 2022Observed: 15.81 ft at 8:30AM May 22, 2022Observed: 15.78 ft at 8:45AM May 22, 2022Observed: 15.79 ft at 9:00AM May 22, 2022Observed: 15.79 ft at 9:15AM May 22, 2022Observed: 15.8 ft at 9:30AM May 22, 2022Observed: 15.79 ft at 9:45AM May 22, 2022Observed: 15.79 ft at 10:00AM May 22, 2022Observed: 15.8 ft at 10:15AM May 22, 2022Observed: 15.77 ft at 10:30AM May 22, 2022Observed: 15.79 ft at 10:45AM May 22, 2022Observed: 15.78 ft at 11:00AM May 22, 2022Observed: 15.78 ft at 11:15AM May 22, 2022Observed: 15.78 ft at 11:30AM May 22, 2022Observed: 15.77 ft at 11:45AM May 22, 2022Observed: 15.77 ft at 12:00PM May 22, 2022Observed: 15.77 ft at 12:15PM May 22, 2022Observed: 15.77 ft at 12:30PM May 22, 2022Observed: 15.77 ft at 12:45PM May 22, 2022Observed: 15.77 ft at 1:00PM May 22, 2022Observed: 15.77 ft at 1:15PM May 22, 2022Observed: 15.76 ft at 1:30PM May 22, 2022Observed: 15.76 ft at 1:45PM May 22, 2022Observed: 15.77 ft at 2:00PM May 22, 2022Observed: 15.76 ft at 2:15PM May 22, 2022Observed: 15.77 ft at 2:30PM May 22, 2022Observed: 15.76 ft at 2:45PM May 22, 2022Observed: 15.75 ft at 3:00PM May 22, 2022Observed: 15.74 ft at 3:15PM May 22, 2022Observed: 15.75 ft at 3:30PM May 22, 2022Observed: 15.74 ft at 3:45PM May 22, 2022Observed: 15.73 ft at 4:00PM May 22, 2022Observed: 15.74 ft at 4:15PM May 22, 2022Observed: 15.73 ft at 4:30PM May 22, 2022Observed: 15.73 ft at 4:45PM May 22, 2022Observed: 15.72 ft at 5:00PM May 22, 2022Observed: 15.7 ft at 5:15PM May 22, 2022Observed: 15.71 ft at 5:30PM May 22, 2022Observed: 15.71 ft at 5:45PM May 22, 2022Observed: 15.69 ft at 6:00PM May 22, 2022Observed: 15.71 ft at 6:15PM May 22, 2022Observed: 15.7 ft at 6:30PM May 22, 2022Observed: 15.7 ft at 6:45PM May 22, 2022Observed: 15.68 ft at 7:00PM May 22, 2022Observed: 15.69 ft at 7:15PM May 22, 2022Observed: 15.69 ft at 7:30PM May 22, 2022Observed: 15.69 ft at 7:45PM May 22, 2022Observed: 15.69 ft at 8:00PM May 22, 2022Observed: 15.68 ft at 8:15PM May 22, 2022Observed: 15.67 ft at 8:30PM May 22, 2022Observed: 15.69 ft at 8:45PM May 22, 2022Observed: 15.67 ft at 9:00PM May 22, 2022Observed: 15.68 ft at 9:15PM May 22, 2022Observed: 15.68 ft at 9:30PM May 22, 2022Observed: 15.69 ft at 9:45PM May 22, 2022Observed: 15.68 ft at 10:00PM May 22, 2022Observed: 15.69 ft at 10:15PM May 22, 2022Observed: 15.66 ft at 10:30PM May 22, 2022Observed: 15.68 ft at 10:45PM May 22, 2022Observed: 15.67 ft at 11:00PM May 22, 2022Observed: 15.65 ft at 11:15PM May 22, 2022Observed: 15.65 ft at 11:30PM May 22, 2022Observed: 15.67 ft at 11:45PM May 22, 2022Observed: 15.66 ft at 12:00AM May 23, 2022Observed: 15.66 ft at 12:15AM May 23, 2022Observed: 15.65 ft at 12:30AM May 23, 2022Observed: 15.66 ft at 12:45AM May 23, 2022Observed: 15.65 ft at 1:00AM May 23, 2022Observed: 15.64 ft at 1:15AM May 23, 2022Observed: 15.66 ft at 1:30AM May 23, 2022Observed: 15.64 ft at 1:45AM May 23, 2022Observed: 15.64 ft at 2:00AM May 23, 2022Observed: 15.62 ft at 2:15AM May 23, 2022Observed: 15.64 ft at 2:30AM May 23, 2022Observed: 15.62 ft at 2:45AM May 23, 2022Observed: 15.63 ft at 3:00AM May 23, 2022Observed: 15.63 ft at 3:01AM May 23, 2022Observed: 15.63 ft at 3:15AM May 23, 2022Observed: 15.63 ft at 3:16AM May 23, 2022Observed: 15.62 ft at 3:30AM May 23, 2022Observed: 15.62 ft at 3:31AM May 23, 2022Observed: 15.62 ft at 3:45AM May 23, 2022Observed: 15.62 ft at 4:00AM May 23, 2022Observed: 15.62 ft at 4:15AM May 23, 2022Observed: 15.61 ft at 4:30AM May 23, 2022Observed: 15.62 ft at 4:45AM May 23, 2022Observed: 15.6 ft at 5:00AM May 23, 2022Observed: 15.6 ft at 5:15AM May 23, 2022Observed: 15.6 ft at 5:30AM May 23, 2022Observed: 15.59 ft at 5:45AM May 23, 2022Observed: 15.6 ft at 6:00AM May 23, 2022Observed: 15.6 ft at 6:15AM May 23, 2022Observed: 15.58 ft at 6:30AM May 23, 2022Observed: 15.59 ft at 6:45AM May 23, 2022Observed: 15.58 ft at 7:00AM May 23, 2022Observed: 15.58 ft at 7:15AM May 23, 2022Observed: 15.58 ft at 7:30AM May 23, 2022Observed: 15.56 ft at 7:45AM May 23, 2022Observed: 15.57 ft at 8:00AM May 23, 2022Observed: 15.57 ft at 8:15AM May 23, 2022Observed: 15.57 ft at 8:30AM May 23, 2022Observed: 15.56 ft at 8:45AM May 23, 2022Observed: 15.57 ft at 9:00AM May 23, 2022Observed: 15.57 ft at 9:15AM May 23, 2022Observed: 15.57 ft at 9:30AM May 23, 2022Observed: 15.56 ft at 9:45AM May 23, 2022Observed: 15.55 ft at 10:00AM May 23, 2022Observed: 15.56 ft at 10:15AM May 23, 2022Observed: 15.55 ft at 10:30AM May 23, 2022Observed: 15.54 ft at 10:45AM May 23, 2022Observed: 15.53 ft at 11:00AM May 23, 2022Observed: 15.53 ft at 11:15AM May 23, 2022Observed: 15.53 ft at 11:16AM May 23, 2022Observed: 15.53 ft at 11:30AM May 23, 2022Observed: 15.53 ft at 11:31AM May 23, 2022Observed: 15.53 ft at 11:45AM May 23, 2022Observed: 15.53 ft at 11:46AM May 23, 2022Observed: 15.52 ft at 12:00PM May 23, 2022Observed: 15.53 ft at 12:15PM May 23, 2022Observed: 15.52 ft at 12:30PM May 23, 2022Observed: 15.52 ft at 12:45PM May 23, 2022Observed: 15.51 ft at 1:00PM May 23, 2022Observed: 15.53 ft at 1:15PM May 23, 2022Observed: 15.51 ft at 1:30PM May 23, 2022Observed: 15.52 ft at 1:45PM May 23, 2022Observed: 15.51 ft at 2:00PM May 23, 2022Observed: 15.5 ft at 2:15PM May 23, 2022Observed: 15.5 ft at 2:30PM May 23, 2022Observed: 15.5 ft at 2:45PM May 23, 2022Observed: 15.5 ft at 3:00PM May 23, 2022Observed: 15.5 ft at 3:15PM May 23, 2022Observed: 15.49 ft at 3:30PM May 23, 2022Observed: 15.5 ft at 3:45PM May 23, 2022Observed: 15.48 ft at 4:00PM May 23, 2022Observed: 15.47 ft at 4:15PM May 23, 2022Observed: 15.47 ft at 4:30PM May 23, 2022Observed: 15.47 ft at 4:45PM May 23, 2022Observed: 15.48 ft at 5:00PM May 23, 2022Observed: 15.48 ft at 5:15PM May 23, 2022Observed: 15.47 ft at 5:30PM May 23, 2022Observed: 15.48 ft at 5:45PM May 23, 2022Observed: 15.46 ft at 6:00PM May 23, 2022Observed: 15.45 ft at 6:15PM May 23, 2022Observed: 15.47 ft at 6:30PM May 23, 2022Observed: 15.45 ft at 6:45PM May 23, 2022Observed: 15.45 ft at 7:00PM May 23, 2022Observed: 15.45 ft at 7:15PM May 23, 2022Observed: 15.45 ft at 7:16PM May 23, 2022Observed: 15.46 ft at 7:30PM May 23, 2022Observed: 15.46 ft at 7:31PM May 23, 2022Observed: 15.46 ft at 7:45PM May 23, 2022Observed: 15.46 ft at 7:46PM May 23, 2022Observed: 15.44 ft at 8:00PM May 23, 2022Observed: 15.44 ft at 8:15PM May 23, 2022Observed: 15.45 ft at 8:30PM May 23, 2022Observed: 15.45 ft at 8:45PM May 23, 2022Observed: 15.44 ft at 9:00PM May 23, 2022Observed: 15.44 ft at 9:15PM May 23, 2022Observed: 15.43 ft at 9:30PM May 23, 2022Observed: 15.43 ft at 9:45PM May 23, 2022Observed: 15.42 ft at 10:00PM May 23, 2022Observed: 15.43 ft at 10:15PM May 23, 2022Observed: 15.43 ft at 10:30PM May 23, 2022Observed: 15.41 ft at 10:45PM May 23, 2022Observed: 15.41 ft at 11:00PM May 23, 2022Observed: 15.42 ft at 11:15PM May 23, 2022Observed: 15.42 ft at 11:30PM May 23, 2022Observed: 15.41 ft at 11:45PM May 23, 2022Observed: 15.42 ft at 12:00AM May 24, 2022Observed: 15.41 ft at 12:15AM May 24, 2022Observed: 15.41 ft at 12:30AM May 24, 2022Observed: 15.41 ft at 12:45AM May 24, 2022Observed: 15.39 ft at 1:00AM May 24, 2022Observed: 15.4 ft at 1:15AM May 24, 2022Observed: 15.39 ft at 1:30AM May 24, 2022Observed: 15.41 ft at 1:45AM May 24, 2022Observed: 15.4 ft at 2:00AM May 24, 2022Observed: 15.4 ft at 2:15AM May 24, 2022Observed: 15.38 ft at 2:30AM May 24, 2022Observed: 15.38 ft at 2:45AM May 24, 2022Observed: 15.38 ft at 3:00AM May 24, 2022Observed: 15.39 ft at 3:15AM May 24, 2022Observed: 15.39 ft at 3:17AM May 24, 2022Observed: 15.38 ft at 3:30AM May 24, 2022Observed: 15.38 ft at 3:32AM May 24, 2022Observed: 15.38 ft at 3:45AM May 24, 2022Observed: 15.38 ft at 3:47AM May 24, 2022Observed: 15.38 ft at 4:00AM May 24, 2022Observed: 15.36 ft at 4:15AM May 24, 2022Observed: 15.38 ft at 4:30AM May 24, 2022Observed: 15.37 ft at 4:45AM May 24, 2022Observed: 15.37 ft at 5:00AM May 24, 2022Observed: 15.37 ft at 5:15AM May 24, 2022Observed: 15.36 ft at 5:30AM May 24, 2022Observed: 15.37 ft at 5:45AM May 24, 2022Observed: 15.34 ft at 6:00AM May 24, 2022Observed: 15.37 ft at 6:15AM May 24, 2022Observed: 15.35 ft at 6:30AM May 24, 2022Observed: 15.34 ft at 6:45AM May 24, 2022Observed: 15.36 ft at 7:00AM May 24, 2022Observed: 15.36 ft at 7:15AM May 24, 2022Observed: 15.35 ft at 7:30AM May 24, 2022Observed: 15.35 ft at 7:45AM May 24, 2022Observed: 15.35 ft at 8:00AM May 24, 2022Observed: 15.34 ft at 8:15AM May 24, 2022Observed: 15.34 ft at 8:30AM May 24, 2022Observed: 15.35 ft at 8:45AM May 24, 2022Observed: 15.35 ft at 9:00AM May 24, 2022Observed: 15.34 ft at 9:15AM May 24, 2022Observed: 15.33 ft at 9:30AM May 24, 2022Observed: 15.34 ft at 9:45AM May 24, 2022Observed: 15.33 ft at 10:00AM May 24, 2022Observed: 15.31 ft at 10:15AM May 24, 2022Observed: 15.32 ft at 10:30AM May 24, 2022Observed: 15.32 ft at 10:45AM May 24, 2022Observed: 15.32 ft at 11:00AM May 24, 2022Observed: 15.32 ft at 11:15AM May 24, 2022Observed: 15.32 ft at 11:16AM May 24, 2022Observed: 15.31 ft at 11:30AM May 24, 2022Observed: 15.31 ft at 11:31AM May 24, 2022Observed: 15.31 ft at 11:45AM May 24, 2022Observed: 15.31 ft at 11:46AM May 24, 2022Observed: 15.3 ft at 12:00PM May 24, 2022Observed: 15.3 ft at 12:15PM May 24, 2022Observed: 15.29 ft at 12:30PM May 24, 2022Observed: 15.29 ft at 12:45PM May 24, 2022Observed: 15.3 ft at 1:00PM May 24, 2022Observed: 15.29 ft at 1:15PM May 24, 2022Observed: 15.29 ft at 1:30PM May 24, 2022Observed: 15.29 ft at 1:45PM May 24, 2022Observed: 15.29 ft at 2:00PM May 24, 2022Observed: 15.28 ft at 2:15PM May 24, 2022Observed: 15.3 ft at 2:30PM May 24, 2022Observed: 15.28 ft at 2:45PM May 24, 2022Observed: 15.28 ft at 3:00PM May 24, 2022Observed: 15.28 ft at 3:15PM May 24, 2022Observed: 15.26 ft at 3:30PM May 24, 2022Observed: 15.27 ft at 3:45PM May 24, 2022Observed: 15.27 ft at 4:00PM May 24, 2022Observed: 15.26 ft at 4:15PM May 24, 2022Observed: 15.27 ft at 4:30PM May 24, 2022Observed: 15.25 ft at 4:45PM May 24, 2022Observed: 15.26 ft at 5:00PM May 24, 2022Observed: 15.25 ft at 5:15PM May 24, 2022Observed: 15.25 ft at 5:30PM May 24, 2022Observed: 15.26 ft at 5:45PM May 24, 2022Observed: 15.26 ft at 6:00PM May 24, 2022Observed: 15.25 ft at 6:15PM May 24, 2022Observed: 15.25 ft at 6:30PM May 24, 2022Observed: 15.22 ft at 6:45PM May 24, 2022Observed: 15.25 ft at 7:00PM May 24, 2022Observed: 15.24 ft at 7:15PM May 24, 2022Observed: 15.24 ft at 7:16PM May 24, 2022Observed: 15.23 ft at 7:30PM May 24, 2022Observed: 15.23 ft at 7:31PM May 24, 2022Observed: 15.24 ft at 7:45PM May 24, 2022Observed: 15.24 ft at 7:46PM May 24, 2022Observed: 15.24 ft at 8:00PM May 24, 2022Observed: 15.22 ft at 8:15PM May 24, 2022Observed: 15.23 ft at 8:30PM May 24, 2022Observed: 15.22 ft at 8:45PM May 24, 2022Observed: 15.21 ft at 9:00PM May 24, 2022Observed: 15.22 ft at 9:15PM May 24, 2022Observed: 15.22 ft at 9:30PM May 24, 2022Observed: 15.23 ft at 9:45PM May 24, 2022Observed: 15.23 ft at 10:00PM May 24, 2022Observed: 15.22 ft at 10:15PM May 24, 2022Observed: 15.21 ft at 10:30PM May 24, 2022Observed: 15.22 ft at 10:45PM May 24, 2022Observed: 15.23 ft at 11:00PM May 24, 2022Observed: 15.21 ft at 11:15PM May 24, 2022Observed: 15.22 ft at 11:30PM May 24, 2022Observed: 15.22 ft at 11:45PM May 24, 2022Observed: 15.2 ft at 12:00AM May 25, 2022Observed: 15.21 ft at 12:15AM May 25, 2022Observed: 15.21 ft at 12:30AM May 25, 2022Observed: 15.21 ft at 12:45AM May 25, 2022Observed: 15.2 ft at 1:00AM May 25, 2022Observed: 15.22 ft at 1:15AM May 25, 2022Observed: 15.21 ft at 1:30AM May 25, 2022Observed: 15.21 ft at 1:45AM May 25, 2022Observed: 15.22 ft at 2:00AM May 25, 2022Observed: 15.21 ft at 2:15AM May 25, 2022Observed: 15.2 ft at 2:30AM May 25, 2022Observed: 15.19 ft at 2:45AM May 25, 2022Observed: 15.21 ft at 3:00AM May 25, 2022Observed: 15.2 ft at 3:15AM May 25, 2022Observed: 15.2 ft at 3:16AM May 25, 2022Observed: 15.19 ft at 3:30AM May 25, 2022Observed: 15.19 ft at 3:31AM May 25, 2022Observed: 15.21 ft at 3:45AM May 25, 2022Observed: 15.21 ft at 3:46AM May 25, 2022Observed: 15.22 ft at 4:00AM May 25, 2022Observed: 15.2 ft at 4:15AM May 25, 2022Observed: 15.2 ft at 4:30AM May 25, 2022Observed: 15.2 ft at 4:45AM May 25, 2022Observed: 15.2 ft at 5:00AM May 25, 2022Observed: 15.19 ft at 5:15AM May 25, 2022Observed: 15.18 ft at 5:30AM May 25, 2022Observed: 15.19 ft at 5:45AM May 25, 2022Observed: 15.19 ft at 6:00AM May 25, 2022Observed: 15.19 ft at 6:15AM May 25, 2022Observed: 15.18 ft at 6:30AM May 25, 2022Observed: 15.17 ft at 6:45AM May 25, 2022Observed: 15.18 ft at 7:00AM May 25, 2022Observed: 15.18 ft at 7:15AM May 25, 2022Observed: 15.17 ft at 7:30AM May 25, 2022Observed: 15.17 ft at 7:45AM May 25, 2022Observed: 15.16 ft at 8:00AM May 25, 2022Observed: 15.18 ft at 8:15AM May 25, 2022Observed: 15.17 ft at 8:30AM May 25, 2022Observed: 15.17 ft at 8:45AM May 25, 2022Observed: 15.18 ft at 9:00AM May 25, 2022Observed: 15.17 ft at 9:15AM May 25, 2022Observed: 15.15 ft at 9:30AM May 25, 2022Observed: 15.16 ft at 9:45AM May 25, 2022Observed: 15.16 ft at 10:00AM May 25, 2022Observed: 15.14 ft at 10:15AM May 25, 2022Observed: 15.15 ft at 10:30AM May 25, 2022Observed: 15.14 ft at 10:45AM May 25, 2022Observed: 15.15 ft at 11:00AM May 25, 2022Observed: 15.15 ft at 11:15AM May 25, 2022Observed: 15.15 ft at 11:16AM May 25, 2022Observed: 15.14 ft at 11:30AM May 25, 2022Observed: 15.14 ft at 11:31AM May 25, 2022Observed: 15.14 ft at 11:45AM May 25, 2022Observed: 15.14 ft at 11:46AM May 25, 2022Observed: 15.14 ft at 12:00PM May 25, 2022Observed: 15.13 ft at 12:15PM May 25, 2022Observed: 15.14 ft at 12:30PM May 25, 2022Observed: 15.13 ft at 12:45PM May 25, 2022Observed: 15.13 ft at 1:00PM May 25, 2022Observed: 15.11 ft at 1:15PM May 25, 2022Observed: 15.11 ft at 1:30PM May 25, 2022Observed: 15.1 ft at 1:45PM May 25, 2022Observed: 15.1 ft at 2:00PM May 25, 2022Observed: 15.1 ft at 2:15PM May 25, 2022Observed: 15.08 ft at 2:30PM May 25, 2022Observed: 15.08 ft at 2:45PM May 25, 2022Observed: 15.08 ft at 3:00PM May 25, 2022Observed: 15.06 ft at 3:15PM May 25, 2022Observed: 15.06 ft at 3:30PM May 25, 2022Observed: 15.05 ft at 3:45PM May 25, 2022Observed: 15.05 ft at 4:00PM May 25, 2022Observed: 15.04 ft at 4:15PM May 25, 2022Observed: 15.04 ft at 4:30PM May 25, 2022Observed: 15.03 ft at 4:45PM May 25, 2022Observed: 15.01 ft at 5:00PM May 25, 2022Observed: 14.99 ft at 5:15PM May 25, 2022Observed: 14.98 ft at 5:30PM May 25, 2022Observed: 14.98 ft at 5:45PM May 25, 2022Observed: 14.97 ft at 6:00PM May 25, 2022Observed: 14.97 ft at 6:15PM May 25, 2022Observed: 14.97 ft at 6:30PM May 25, 2022Observed: 14.96 ft at 6:45PM May 25, 2022Observed: 14.94 ft at 7:00PM May 25, 2022Observed: 14.93 ft at 7:15PM May 25, 2022Observed: 14.93 ft at 7:17PM May 25, 2022Observed: 14.91 ft at 7:30PM May 25, 2022Observed: 14.91 ft at 7:32PM May 25, 2022Observed: 14.92 ft at 7:45PM May 25, 2022Observed: 14.92 ft at 7:47PM May 25, 2022Observed: 14.9 ft at 8:00PM May 25, 2022Observed: 14.89 ft at 8:15PM May 25, 2022Observed: 14.89 ft at 8:30PM May 25, 2022Observed: 14.88 ft at 8:45PM May 25, 2022Observed: 14.88 ft at 9:00PM May 25, 2022Observed: 14.87 ft at 9:15PM May 25, 2022Observed: 14.86 ft at 9:30PM May 25, 2022Observed: 14.86 ft at 9:45PM May 25, 2022Observed: 14.85 ft at 10:00PM May 25, 2022Observed: 14.84 ft at 10:15PM May 25, 2022Observed: 14.84 ft at 10:30PM May 25, 2022Observed: 14.84 ft at 10:45PM May 25, 2022Observed: 14.84 ft at 11:00PM May 25, 2022Observed: 14.84 ft at 11:15PM May 25, 2022Observed: 14.84 ft at 11:30PM May 25, 2022Observed: 14.85 ft at 11:45PM May 25, 2022Observed: 14.85 ft at 12:00AM May 26, 2022Observed: 14.82 ft at 12:15AM May 26, 2022Observed: 14.84 ft at 12:30AM May 26, 2022Observed: 14.85 ft at 12:45AM May 26, 2022Observed: 14.86 ft at 1:00AM May 26, 2022Observed: 14.86 ft at 1:15AM May 26, 2022Observed: 14.86 ft at 1:30AM May 26, 2022Observed: 14.87 ft at 1:45AM May 26, 2022Observed: 14.88 ft at 2:00AM May 26, 2022Observed: 14.88 ft at 2:15AM May 26, 2022Observed: 14.9 ft at 2:30AM May 26, 2022Observed: 14.89 ft at 2:45AM May 26, 2022Observed: 14.91 ft at 3:00AM May 26, 2022Observed: 14.92 ft at 3:15AM May 26, 2022Observed: 14.92 ft at 3:16AM May 26, 2022Observed: 14.91 ft at 3:30AM May 26, 2022Observed: 14.91 ft at 3:31AM May 26, 2022Observed: 14.93 ft at 3:45AM May 26, 2022Observed: 14.93 ft at 3:46AM May 26, 2022Observed: 14.94 ft at 4:00AM May 26, 2022Observed: 14.95 ft at 4:15AM May 26, 2022Observed: 14.97 ft at 4:30AM May 26, 2022Observed: 14.97 ft at 4:45AM May 26, 2022Observed: 14.98 ft at 5:00AM May 26, 2022Observed: 15 ft at 5:15AM May 26, 2022Observed: 15 ft at 5:30AM May 26, 2022Observed: 15.01 ft at 5:45AM May 26, 2022Observed: 15.02 ft at 6:00AM May 26, 2022Observed: 15.04 ft at 6:15AM May 26, 2022Observed: 15.04 ft at 6:30AM May 26, 2022Observed: 15.05 ft at 6:45AM May 26, 2022Observed: 15.06 ft at 7:00AM May 26, 2022Observed: 15.06 ft at 7:15AM May 26, 2022Observed: 15.07 ft at 7:30AM May 26, 2022Observed: 15.08 ft at 7:45AM May 26, 2022Observed: 15.09 ft at 8:00AM May 26, 2022Observed: 15.09 ft at 8:15AM May 26, 2022Observed: 15.1 ft at 8:30AM May 26, 2022Observed: 15.09 ft at 8:45AM May 26, 2022Observed: 15.11 ft at 9:00AM May 26, 2022Observed: 15.1 ft at 9:15AM May 26, 2022Observed: 15.11 ft at 9:30AM May 26, 2022Observed: 15.11 ft at 9:45AM May 26, 2022Observed: 15.11 ft at 10:00AM May 26, 2022Observed: 15.12 ft at 10:15AM May 26, 2022Observed: 15.1 ft at 10:30AM May 26, 2022Observed: 15.11 ft at 10:45AM May 26, 2022Observed: 15.11 ft at 11:00AM May 26, 2022Observed: 15.12 ft at 11:15AM May 26, 2022Observed: 15.12 ft at 11:17AM May 26, 2022Observed: 15.11 ft at 11:30AM May 26, 2022Observed: 15.11 ft at 11:32AM May 26, 2022Observed: 15.12 ft at 11:45AM May 26, 2022Observed: 15.12 ft at 11:47AM May 26, 2022Observed: 15.11 ft at 12:00PM May 26, 2022Observed: 15.11 ft at 12:15PM May 26, 2022Observed: 15.1 ft at 12:30PM May 26, 2022Observed: 15.09 ft at 12:45PM May 26, 2022Observed: 15.09 ft at 1:00PM May 26, 2022Observed: 15.09 ft at 1:15PM May 26, 2022Observed: 15.09 ft at 1:30PM May 26, 2022Observed: 15.08 ft at 1:45PM May 26, 2022Observed: 15.07 ft at 2:00PM May 26, 2022Observed: 15.05 ft at 2:15PM May 26, 2022Observed: 15.04 ft at 2:30PM May 26, 2022Observed: 15.03 ft at 2:45PM May 26, 2022Observed: 15.04 ft at 3:00PM May 26, 2022Observed: 15.03 ft at 3:15PM May 26, 2022Observed: 15.01 ft at 3:30PM May 26, 2022Observed: 15.01 ft at 3:45PM May 26, 2022Observed: 14.98 ft at 4:00PM May 26, 2022Observed: 14.98 ft at 4:15PM May 26, 2022Observed: 14.95 ft at 4:30PM May 26, 2022Observed: 14.94 ft at 4:45PM May 26, 2022Observed: 14.92 ft at 5:00PM May 26, 2022Observed: 14.92 ft at 5:15PM May 26, 2022Observed: 14.91 ft at 5:30PM May 26, 2022Observed: 14.9 ft at 5:45PM May 26, 2022Observed: 14.88 ft at 6:00PM May 26, 2022Observed: 14.87 ft at 6:15PM May 26, 2022Observed: 14.86 ft at 6:30PM May 26, 2022Observed: 14.83 ft at 6:45PM May 26, 2022Observed: 14.82 ft at 7:00PM May 26, 2022Observed: 14.82 ft at 7:15PM May 26, 2022Observed: 14.79 ft at 7:30PM May 26, 2022Observed: 14.79 ft at 7:32PM May 26, 2022Observed: 14.78 ft at 7:45PM May 26, 2022Observed: 14.78 ft at 7:47PM May 26, 2022Observed: 14.77 ft at 8:00PM May 26, 2022Observed: 14.77 ft at 8:02PM May 26, 2022Observed: 14.74 ft at 8:15PM May 26, 2022Observed: 14.73 ft at 8:30PM May 26, 2022Observed: 14.73 ft at 8:45PM May 26, 2022Observed: 14.71 ft at 9:00PM May 26, 2022Observed: 14.7 ft at 9:15PM May 26, 2022Observed: 14.69 ft at 9:30PM May 26, 2022Observed: 14.69 ft at 9:45PM May 26, 2022Observed: 14.68 ft at 10:00PM May 26, 2022Observed: 14.67 ft at 10:15PM May 26, 2022Observed: 14.67 ft at 10:30PM May 26, 2022Observed: 14.65 ft at 10:45PM May 26, 2022Observed: 14.65 ft at 11:00PM May 26, 2022Observed: 14.65 ft at 11:15PM May 26, 2022Observed: 14.65 ft at 11:30PM May 26, 2022Observed: 14.64 ft at 11:45PM May 26, 2022Observed: 14.64 ft at 12:00AM May 27, 2022Observed: 14.63 ft at 12:15AM May 27, 2022Observed: 14.63 ft at 12:30AM May 27, 2022Observed: 14.65 ft at 12:45AM May 27, 2022Observed: 14.64 ft at 1:00AM May 27, 2022Observed: 14.64 ft at 1:15AM May 27, 2022Observed: 14.66 ft at 1:30AM May 27, 2022Observed: 14.67 ft at 1:45AM May 27, 2022Observed: 14.67 ft at 2:00AM May 27, 2022Observed: 14.69 ft at 2:15AM May 27, 2022Observed: 14.7 ft at 2:30AM May 27, 2022Observed: 14.71 ft at 2:45AM May 27, 2022Observed: 14.71 ft at 3:00AM May 27, 2022Observed: 14.74 ft at 3:15AM May 27, 2022Observed: 14.75 ft at 3:30AM May 27, 2022Observed: 14.75 ft at 3:31AM May 27, 2022Observed: 14.77 ft at 3:45AM May 27, 2022Observed: 14.77 ft at 3:46AM May 27, 2022Observed: 14.78 ft at 4:00AM May 27, 2022Observed: 14.78 ft at 4:01AM May 27, 2022Observed: 14.8 ft at 4:15AM May 27, 2022Observed: 14.81 ft at 4:30AM May 27, 2022Observed: 14.83 ft at 4:45AM May 27, 2022Observed: 14.85 ft at 5:00AM May 27, 2022Observed: 14.86 ft at 5:15AM May 27, 2022Observed: 14.87 ft at 5:30AM May 27, 2022Observed: 14.9 ft at 5:45AM May 27, 2022Observed: 14.9 ft at 6:00AM May 27, 2022Observed: 14.93 ft at 6:15AM May 27, 2022Observed: 14.93 ft at 6:30AM May 27, 2022Observed: 14.94 ft at 6:45AM May 27, 2022Observed: 14.96 ft at 7:00AM May 27, 2022Observed: 14.97 ft at 7:15AM May 27, 2022Observed: 14.98 ft at 7:30AM May 27, 2022Observed: 14.97 ft at 7:45AM May 27, 2022Observed: 14.98 ft at 8:00AM May 27, 2022Observed: 14.99 ft at 8:15AM May 27, 2022Observed: 15.01 ft at 8:30AM May 27, 2022Observed: 15.02 ft at 8:45AM May 27, 2022Observed: 15.02 ft at 9:00AM May 27, 2022Observed: 15.03 ft at 9:15AM May 27, 2022Observed: 15.03 ft at 9:30AM May 27, 2022Observed: 15.04 ft at 9:45AM May 27, 2022Observed: 15.03 ft at 10:00AM May 27, 2022Observed: 15.04 ft at 10:15AM May 27, 2022Observed: 15.05 ft at 10:30AM May 27, 2022Observed: 15.03 ft at 10:45AM May 27, 2022Observed: 15.04 ft at 11:00AM May 27, 2022Observed: 15.03 ft at 11:15AM May 27, 2022Observed: 15.05 ft at 11:30AM May 27, 2022Observed: 15.05 ft at 11:31AM May 27, 2022Observed: 15.03 ft at 11:45AM May 27, 2022Observed: 15.03 ft at 11:46AM May 27, 2022Observed: 15.03 ft at 12:00PM May 27, 2022Observed: 15.03 ft at 12:01PM May 27, 2022Observed: 15.02 ft at 12:15PM May 27, 2022Observed: 15.02 ft at 12:30PM May 27, 2022USGS--Water Resources of the United StatesHWDI4(plotting HGIRG) Graph Created (1:19PM May 27, 2022)ObservedLatest observed value: 15.02 ft at 12:30 PM CDT 27-May-2022. Flood Stage is 20.5 ft
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Tabular Data (UTC)
Tabular Data (CDT)
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Datum: NAVD88
Metadata
NOTE: River forecasts for this location take into account past precipitation and the precipitation amounts expected approximately 24 hours into the future from the forecast issuance time.

NOTE: Forecasts for the Big Sioux River above Hawarden are issued as needed during times of high water, but are not routinely available.

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Flood Categories (in feet)
Major Flood Stage: 27
Moderate Flood Stage: 24
Flood Stage: 20.5
Action Stage: 18.5
Low Stage (in feet): -9999

Historic Crests
(1) 35.20 ft on 03/15/2019
(2) 34.00 ft on 06/22/2018
(3) 32.83 ft on 09/15/2019 (P)
(4) 23.02 ft on 03/30/2020
(5) 22.38 ft on 05/02/2016
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 23.02 ft on 03/30/2020
(2) 32.83 ft on 09/15/2019 (P)
(3) 35.20 ft on 03/15/2019
(4) 34.00 ft on 06/22/2018
(5) 20.35 ft on 05/23/2017
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:16
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Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
32 water backs up into the park in Hawarden, and some basements and sewers could begin to have problems.
30.5 Iowa Highway 10 begins to flood.
30 South Dakota Highway 46 begins to flood north of Hawarden.
29.5 County Road 13 begins to flood west of Hawarden.
28.5 River Road begins to flood about 1 1/2 miles south of County Road 13.
24 some farm houses on the South Dakota side of the river are isolated by high water.
20.5 agricultural flooding begins on the South Dakota side of the river.
About This Location Collapse

Latitude: 43.051389° N, Longitude: 96.489444° W, Horizontal Datum: NAD27

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 20.5 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 1150.00 1170.50 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:
Additional Information Collapse
This location became the official NWS river forecast point for the Big Sioux River near Hawarden on January 1, 2017. On Wednesday, April 11, 2018, the elevation defining Flood Stage for HWDI4 will be changed from 19.0 feet to 20.5 feet. How low could the river get?
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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
Sioux Falls Weather Forecast Office
26 Weather Lane
Sioux Falls, SD 57104-0198
(605) 330-4247
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