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Hydrograph River at a Glance Download
St. Marys River at Great Mills Stage (ft)Flow (cfs)Observed: 1.94 ft at 8:45AM May 16, 2018Observed: 1.93 ft at 9:00AM May 16, 2018Observed: 1.93 ft at 9:15AM May 16, 2018Observed: 1.92 ft at 9:30AM May 16, 2018Observed: 1.92 ft at 9:45AM May 16, 2018Observed: 1.92 ft at 10:00AM May 16, 2018Observed: 1.91 ft at 10:15AM May 16, 2018Observed: 1.91 ft at 10:30AM May 16, 2018Observed: 1.9 ft at 10:45AM May 16, 2018Observed: 1.9 ft at 11:00AM May 16, 2018Observed: 1.89 ft at 11:15AM May 16, 2018Observed: 1.88 ft at 11:30AM May 16, 2018Observed: 1.88 ft at 11:45AM May 16, 2018Observed: 1.88 ft at 12:00PM May 16, 2018Observed: 1.87 ft at 12:15PM May 16, 2018Observed: 1.87 ft at 12:30PM May 16, 2018Observed: 1.86 ft at 12:45PM May 16, 2018Observed: 1.87 ft at 1:00PM May 16, 2018Observed: 1.86 ft at 1:15PM May 16, 2018Observed: 1.86 ft at 1:30PM May 16, 2018Observed: 1.85 ft at 1:45PM May 16, 2018Observed: 1.85 ft at 2:00PM May 16, 2018Observed: 1.84 ft at 2:15PM May 16, 2018Observed: 1.84 ft at 2:30PM May 16, 2018Observed: 1.83 ft at 2:45PM May 16, 2018Observed: 1.83 ft at 3:00PM May 16, 2018Observed: 1.83 ft at 3:15PM May 16, 2018Observed: 1.83 ft at 3:30PM May 16, 2018Observed: 1.83 ft at 3:45PM May 16, 2018Observed: 1.83 ft at 4:00PM May 16, 2018Observed: 1.83 ft at 4:15PM May 16, 2018Observed: 1.82 ft at 4:30PM May 16, 2018Observed: 1.82 ft at 4:45PM May 16, 2018Observed: 1.82 ft at 5:00PM May 16, 2018Observed: 1.82 ft at 5:15PM May 16, 2018Observed: 1.81 ft at 5:30PM May 16, 2018Observed: 1.81 ft at 5:45PM May 16, 2018Observed: 1.81 ft at 6:00PM May 16, 2018Observed: 1.81 ft at 6:15PM May 16, 2018Observed: 1.81 ft at 6:30PM May 16, 2018Observed: 1.81 ft at 6:45PM May 16, 2018Observed: 1.81 ft at 7:00PM May 16, 2018Observed: 1.82 ft at 7:15PM May 16, 2018Observed: 1.82 ft at 7:30PM May 16, 2018Observed: 1.82 ft at 7:45PM May 16, 2018Observed: 1.82 ft at 8:00PM May 16, 2018Observed: 1.82 ft at 8:15PM May 16, 2018Observed: 1.82 ft at 8:30PM May 16, 2018Observed: 1.82 ft at 8:45PM May 16, 2018Observed: 1.83 ft at 9:00PM May 16, 2018Observed: 1.83 ft at 9:15PM May 16, 2018Observed: 1.84 ft at 9:30PM May 16, 2018Observed: 1.84 ft at 9:45PM May 16, 2018Observed: 1.85 ft at 10:00PM May 16, 2018Observed: 1.85 ft at 10:15PM May 16, 2018Observed: 1.86 ft at 10:30PM May 16, 2018Observed: 1.87 ft at 10:45PM May 16, 2018Observed: 1.88 ft at 11:00PM May 16, 2018Observed: 1.89 ft at 11:15PM May 16, 2018Observed: 1.9 ft at 11:30PM May 16, 2018Observed: 1.9 ft at 11:45PM May 16, 2018Observed: 1.91 ft at 12:00AM May 17, 2018Observed: 1.91 ft at 12:15AM May 17, 2018Observed: 1.91 ft at 12:30AM May 17, 2018Observed: 1.91 ft at 12:45AM May 17, 2018Observed: 1.91 ft at 1:00AM May 17, 2018Observed: 1.92 ft at 1:15AM May 17, 2018Observed: 1.93 ft at 1:30AM May 17, 2018Observed: 1.95 ft at 1:45AM May 17, 2018Observed: 1.96 ft at 2:00AM May 17, 2018Observed: 1.96 ft at 2:15AM May 17, 2018Observed: 1.97 ft at 2:30AM May 17, 2018Observed: 1.96 ft at 2:45AM May 17, 2018Observed: 1.96 ft at 3:00AM May 17, 2018Observed: 1.96 ft at 3:15AM May 17, 2018Observed: 1.96 ft at 3:30AM May 17, 2018Observed: 1.95 ft at 3:45AM May 17, 2018Observed: 1.95 ft at 4:00AM May 17, 2018Observed: 1.94 ft at 4:15AM May 17, 2018Observed: 1.94 ft at 4:30AM May 17, 2018Observed: 1.94 ft at 4:45AM May 17, 2018Observed: 1.93 ft at 5:00AM May 17, 2018Observed: 1.93 ft at 5:15AM May 17, 2018Observed: 1.92 ft at 5:30AM May 17, 2018Observed: 1.92 ft at 5:45AM May 17, 2018Observed: 1.92 ft at 6:00AM May 17, 2018Observed: 1.91 ft at 6:15AM May 17, 2018Observed: 1.91 ft at 6:30AM May 17, 2018Observed: 1.91 ft at 6:45AM May 17, 2018Observed: 1.9 ft at 7:00AM May 17, 2018Observed: 1.9 ft at 7:15AM May 17, 2018Observed: 1.9 ft at 7:30AM May 17, 2018Observed: 1.89 ft at 7:45AM May 17, 2018Observed: 1.89 ft at 8:00AM May 17, 2018Observed: 1.89 ft at 8:15AM May 17, 2018Observed: 1.88 ft at 8:30AM May 17, 2018Observed: 1.88 ft at 8:45AM May 17, 2018Observed: 1.87 ft at 9:00AM May 17, 2018Observed: 1.87 ft at 9:15AM May 17, 2018Observed: 1.87 ft at 9:30AM May 17, 2018Observed: 1.87 ft at 9:45AM May 17, 2018Observed: 1.87 ft at 10:00AM May 17, 2018Observed: 1.86 ft at 10:15AM May 17, 2018Observed: 1.86 ft at 10:30AM May 17, 2018Observed: 1.86 ft at 10:45AM May 17, 2018Observed: 1.86 ft at 11:00AM May 17, 2018Observed: 1.86 ft at 11:15AM May 17, 2018Observed: 1.86 ft at 11:30AM May 17, 2018Observed: 1.86 ft at 11:45AM May 17, 2018Observed: 1.86 ft at 12:00PM May 17, 2018Observed: 1.85 ft at 12:15PM May 17, 2018Observed: 1.85 ft at 12:30PM May 17, 2018Observed: 1.85 ft at 12:45PM May 17, 2018Observed: 1.84 ft at 1:00PM May 17, 2018Observed: 1.84 ft at 1:15PM May 17, 2018Observed: 1.83 ft at 1:30PM May 17, 2018Observed: 1.83 ft at 1:45PM May 17, 2018Observed: 1.84 ft at 2:00PM May 17, 2018Observed: 1.83 ft at 2:15PM May 17, 2018Observed: 1.83 ft at 2:30PM May 17, 2018Observed: 1.83 ft at 2:45PM May 17, 2018Observed: 1.83 ft at 3:00PM May 17, 2018Observed: 1.83 ft at 3:15PM May 17, 2018Observed: 1.82 ft at 3:30PM May 17, 2018Observed: 1.82 ft at 3:45PM May 17, 2018Observed: 1.82 ft at 4:00PM May 17, 2018Observed: 1.82 ft at 4:15PM May 17, 2018Observed: 1.82 ft at 4:30PM May 17, 2018Observed: 1.82 ft at 4:45PM May 17, 2018Observed: 1.83 ft at 5:00PM May 17, 2018Observed: 1.83 ft at 5:15PM May 17, 2018Observed: 1.84 ft at 5:30PM May 17, 2018Observed: 1.84 ft at 5:45PM May 17, 2018Observed: 1.84 ft at 6:00PM May 17, 2018Observed: 1.84 ft at 6:15PM May 17, 2018Observed: 1.85 ft at 6:30PM May 17, 2018Observed: 1.87 ft at 6:45PM May 17, 2018Observed: 1.88 ft at 7:00PM May 17, 2018Observed: 1.89 ft at 7:15PM May 17, 2018Observed: 1.9 ft at 7:30PM May 17, 2018Observed: 1.92 ft at 7:45PM May 17, 2018Observed: 1.94 ft at 8:00PM May 17, 2018Observed: 1.97 ft at 8:15PM May 17, 2018Observed: 2.01 ft at 8:30PM May 17, 2018Observed: 2.05 ft at 8:45PM May 17, 2018Observed: 2.08 ft at 9:00PM May 17, 2018Observed: 2.1 ft at 9:15PM May 17, 2018Observed: 2.13 ft at 9:30PM May 17, 2018Observed: 2.16 ft at 9:45PM May 17, 2018Observed: 2.19 ft at 10:00PM May 17, 2018Observed: 2.23 ft at 10:15PM May 17, 2018Observed: 2.27 ft at 10:30PM May 17, 2018Observed: 2.31 ft at 10:45PM May 17, 2018Observed: 2.34 ft at 11:00PM May 17, 2018Observed: 2.37 ft at 11:15PM May 17, 2018Observed: 2.4 ft at 11:30PM May 17, 2018Observed: 2.41 ft at 11:45PM May 17, 2018Observed: 2.44 ft at 12:00AM May 18, 2018Observed: 2.45 ft at 12:15AM May 18, 2018Observed: 2.46 ft at 12:30AM May 18, 2018Observed: 2.47 ft at 12:45AM May 18, 2018Observed: 2.47 ft at 1:00AM May 18, 2018Observed: 2.45 ft at 1:15AM May 18, 2018Observed: 2.44 ft at 1:30AM May 18, 2018Observed: 2.43 ft at 1:45AM May 18, 2018Observed: 2.43 ft at 2:00AM May 18, 2018Observed: 2.42 ft at 2:15AM May 18, 2018Observed: 2.42 ft at 2:30AM May 18, 2018Observed: 2.42 ft at 2:45AM May 18, 2018Observed: 2.43 ft at 3:00AM May 18, 2018Observed: 2.44 ft at 3:15AM May 18, 2018Observed: 2.48 ft at 3:30AM May 18, 2018Observed: 2.52 ft at 3:45AM May 18, 2018Observed: 2.59 ft at 4:00AM May 18, 2018Observed: 2.74 ft at 4:15AM May 18, 2018Observed: 3.09 ft at 4:30AM May 18, 2018Observed: 3.37 ft at 4:45AM May 18, 2018Observed: 3.54 ft at 5:00AM May 18, 2018Observed: 3.76 ft at 5:15AM May 18, 2018Observed: 4 ft at 5:30AM May 18, 2018Observed: 4.21 ft at 5:45AM May 18, 2018Observed: 4.39 ft at 6:00AM May 18, 2018Observed: 4.52 ft at 6:15AM May 18, 2018Observed: 4.6 ft at 6:30AM May 18, 2018Observed: 4.72 ft at 6:45AM May 18, 2018Observed: 4.79 ft at 7:00AM May 18, 2018Observed: 4.87 ft at 7:15AM May 18, 2018Observed: 4.96 ft at 7:30AM May 18, 2018Observed: 5.05 ft at 7:45AM May 18, 2018Observed: 5.16 ft at 8:00AM May 18, 2018Observed: 5.32 ft at 8:15AM May 18, 2018Observed: 5.44 ft at 8:30AM May 18, 2018Observed: 5.54 ft at 8:45AM May 18, 2018Observed: 5.63 ft at 9:00AM May 18, 2018Observed: 5.7 ft at 9:15AM May 18, 2018Observed: 5.77 ft at 9:30AM May 18, 2018Observed: 5.87 ft at 9:45AM May 18, 2018Observed: 5.93 ft at 10:00AM May 18, 2018Observed: 6 ft at 10:15AM May 18, 2018Observed: 6.07 ft at 10:30AM May 18, 2018Observed: 6.13 ft at 10:45AM May 18, 2018Observed: 6.2 ft at 11:00AM May 18, 2018Observed: 6.26 ft at 11:15AM May 18, 2018Observed: 6.33 ft at 11:30AM May 18, 2018Observed: 6.37 ft at 11:45AM May 18, 2018Observed: 6.44 ft at 12:00PM May 18, 2018Observed: 6.49 ft at 12:15PM May 18, 2018Observed: 6.53 ft at 12:30PM May 18, 2018Observed: 6.58 ft at 12:45PM May 18, 2018Observed: 6.62 ft at 1:00PM May 18, 2018Observed: 6.68 ft at 1:15PM May 18, 2018Observed: 6.73 ft at 1:30PM May 18, 2018Observed: 6.8 ft at 1:45PM May 18, 2018Observed: 6.94 ft at 2:00PM May 18, 2018Observed: 7.09 ft at 2:15PM May 18, 2018Observed: 7.28 ft at 2:30PM May 18, 2018Observed: 7.48 ft at 2:45PM May 18, 2018Observed: 7.62 ft at 3:00PM May 18, 2018Observed: 7.74 ft at 3:15PM May 18, 2018Observed: 7.82 ft at 3:30PM May 18, 2018Observed: 7.89 ft at 3:45PM May 18, 2018Observed: 7.96 ft at 4:00PM May 18, 2018Observed: 8.04 ft at 4:15PM May 18, 2018Observed: 8.07 ft at 4:30PM May 18, 2018Observed: 8.15 ft at 4:45PM May 18, 2018Observed: 8.18 ft at 5:00PM May 18, 2018Observed: 8.22 ft at 5:15PM May 18, 2018Observed: 8.26 ft at 5:30PM May 18, 2018Observed: 8.3 ft at 5:45PM May 18, 2018Observed: 8.32 ft at 6:00PM May 18, 2018Observed: 8.32 ft at 6:15PM May 18, 2018Highest Observation: 8.33 ft at 6:30PM May 18, 2018Observed: 8.32 ft at 6:45PM May 18, 2018Observed: 8.32 ft at 7:00PM May 18, 2018Observed: 8.29 ft at 7:15PM May 18, 2018Observed: 8.26 ft at 7:30PM May 18, 2018Observed: 8.25 ft at 7:45PM May 18, 2018Observed: 8.23 ft at 8:00PM May 18, 2018Observed: 8.19 ft at 8:15PM May 18, 2018Observed: 8.15 ft at 8:30PM May 18, 2018Observed: 8.14 ft at 8:45PM May 18, 2018Observed: 8.1 ft at 9:00PM May 18, 2018Observed: 8.07 ft at 9:15PM May 18, 2018Observed: 8.03 ft at 9:30PM May 18, 2018Observed: 7.98 ft at 9:45PM May 18, 2018Observed: 7.92 ft at 10:00PM May 18, 2018Observed: 7.89 ft at 10:15PM May 18, 2018Observed: 7.83 ft at 10:30PM May 18, 2018Observed: 7.78 ft at 10:45PM May 18, 2018Observed: 7.71 ft at 11:00PM May 18, 2018Observed: 7.67 ft at 11:15PM May 18, 2018Observed: 7.6 ft at 11:30PM May 18, 2018Observed: 7.54 ft at 11:45PM May 18, 2018Observed: 7.49 ft at 12:00AM May 19, 2018Observed: 7.43 ft at 12:15AM May 19, 2018Observed: 7.38 ft at 12:30AM May 19, 2018Observed: 7.34 ft at 12:45AM May 19, 2018Observed: 7.26 ft at 1:00AM May 19, 2018Observed: 7.22 ft at 1:15AM May 19, 2018Observed: 7.17 ft at 1:30AM May 19, 2018Observed: 7.11 ft at 1:45AM May 19, 2018Observed: 7.05 ft at 2:00AM May 19, 2018Observed: 7.02 ft at 2:15AM May 19, 2018Observed: 6.94 ft at 2:30AM May 19, 2018Observed: 6.88 ft at 2:45AM May 19, 2018Observed: 6.81 ft at 3:00AM May 19, 2018Observed: 6.76 ft at 3:15AM May 19, 2018Observed: 6.7 ft at 3:30AM May 19, 2018Observed: 6.64 ft at 3:45AM May 19, 2018Observed: 6.57 ft at 4:00AM May 19, 2018Observed: 6.52 ft at 4:15AM May 19, 2018Observed: 6.49 ft at 4:30AM May 19, 2018Observed: 6.44 ft at 4:45AM May 19, 2018Observed: 6.42 ft at 5:00AM May 19, 2018Observed: 6.4 ft at 5:15AM May 19, 2018Observed: 6.4 ft at 5:30AM May 19, 2018Observed: 6.36 ft at 5:45AM May 19, 2018Observed: 6.36 ft at 6:00AM May 19, 2018Observed: 6.34 ft at 6:15AM May 19, 2018Observed: 6.32 ft at 6:30AM May 19, 2018Observed: 6.31 ft at 6:45AM May 19, 2018Observed: 6.29 ft at 7:00AM May 19, 2018Observed: 6.27 ft at 7:15AM May 19, 2018Observed: 6.24 ft at 7:30AM May 19, 2018Observed: 6.23 ft at 7:45AM May 19, 2018Observed: 6.18 ft at 8:00AM May 19, 2018Observed: 6.16 ft at 8:15AM May 19, 2018Observed: 6.13 ft at 8:30AM May 19, 2018Observed: 6.11 ft at 8:45AM May 19, 2018Observed: 6.08 ft at 9:00AM May 19, 2018Observed: 6.04 ft at 9:15AM May 19, 2018Observed: 6.02 ft at 9:30AM May 19, 2018Observed: 5.96 ft at 9:45AM May 19, 2018Observed: 5.95 ft at 10:00AM May 19, 2018Observed: 5.9 ft at 10:15AM May 19, 2018Observed: 5.88 ft at 10:30AM May 19, 2018Observed: 5.85 ft at 10:45AM May 19, 2018Observed: 5.81 ft at 11:00AM May 19, 2018Observed: 5.77 ft at 11:15AM May 19, 2018Observed: 5.72 ft at 11:30AM May 19, 2018Observed: 5.67 ft at 11:45AM May 19, 2018Observed: 5.61 ft at 12:00PM May 19, 2018Observed: 5.55 ft at 12:15PM May 19, 2018Observed: 5.48 ft at 12:30PM May 19, 2018Observed: 5.41 ft at 12:45PM May 19, 2018Observed: 5.34 ft at 1:00PM May 19, 2018Observed: 5.27 ft at 1:15PM May 19, 2018Observed: 5.19 ft at 1:30PM May 19, 2018Observed: 5.16 ft at 1:45PM May 19, 2018Observed: 5.19 ft at 2:00PM May 19, 2018Observed: 5.31 ft at 2:15PM May 19, 2018Observed: 5.66 ft at 2:30PM May 19, 2018Observed: 6.1 ft at 2:45PM May 19, 2018Observed: 6.49 ft at 3:00PM May 19, 2018Observed: 6.73 ft at 3:15PM May 19, 2018Observed: 6.87 ft at 3:30PM May 19, 2018Observed: 6.98 ft at 3:45PM May 19, 2018Observed: 7.04 ft at 4:00PM May 19, 2018Observed: 7.1 ft at 4:15PM May 19, 2018Observed: 7.16 ft at 4:30PM May 19, 2018Observed: 7.24 ft at 4:45PM May 19, 2018Observed: 7.3 ft at 5:00PM May 19, 2018Observed: 7.38 ft at 5:15PM May 19, 2018Observed: 7.44 ft at 5:30PM May 19, 2018Observed: 7.48 ft at 5:45PM May 19, 2018Observed: 7.52 ft at 6:00PM May 19, 2018Observed: 7.56 ft at 6:15PM May 19, 2018Observed: 7.57 ft at 6:30PM May 19, 2018Observed: 7.61 ft at 6:45PM May 19, 2018Observed: 7.61 ft at 7:00PM May 19, 2018Observed: 7.62 ft at 7:15PM May 19, 2018Observed: 7.63 ft at 7:30PM May 19, 2018Observed: 7.64 ft at 7:45PM May 19, 2018Observed: 7.68 ft at 8:00PM May 19, 2018Observed: 7.75 ft at 8:15PM May 19, 2018Observed: 7.75 ft at 8:30PM May 19, 2018Observed: 7.82 ft at 8:45PM May 19, 2018Observed: 7.84 ft at 9:00PM May 19, 2018Observed: 7.86 ft at 9:15PM May 19, 2018Observed: 7.88 ft at 9:30PM May 19, 2018Observed: 7.9 ft at 9:45PM May 19, 2018Observed: 7.86 ft at 10:00PM May 19, 2018Observed: 7.86 ft at 10:15PM May 19, 2018Observed: 7.8 ft at 10:30PM May 19, 2018Observed: 7.75 ft at 10:45PM May 19, 2018Observed: 7.7 ft at 11:00PM May 19, 2018Observed: 7.6 ft at 11:15PM May 19, 2018Observed: 7.51 ft at 11:30PM May 19, 2018Observed: 7.4 ft at 11:45PM May 19, 2018Observed: 7.29 ft at 12:00AM May 20, 2018Observed: 7.17 ft at 12:15AM May 20, 2018Observed: 7.03 ft at 12:30AM May 20, 2018Observed: 6.89 ft at 12:45AM May 20, 2018Observed: 6.74 ft at 1:00AM May 20, 2018Observed: 6.58 ft at 1:15AM May 20, 2018Observed: 6.41 ft at 1:30AM May 20, 2018Observed: 6.23 ft at 1:45AM May 20, 2018Observed: 6.04 ft at 2:00AM May 20, 2018Observed: 5.84 ft at 2:15AM May 20, 2018Observed: 5.68 ft at 2:30AM May 20, 2018Observed: 5.52 ft at 2:45AM May 20, 2018Observed: 5.37 ft at 3:00AM May 20, 2018Observed: 5.26 ft at 3:15AM May 20, 2018Observed: 5.13 ft at 3:30AM May 20, 2018Observed: 5.05 ft at 3:45AM May 20, 2018Observed: 4.97 ft at 4:00AM May 20, 2018Observed: 4.9 ft at 4:15AM May 20, 2018Observed: 4.85 ft at 4:30AM May 20, 2018Observed: 4.78 ft at 4:45AM May 20, 2018Observed: 4.71 ft at 5:00AM May 20, 2018Observed: 4.67 ft at 5:15AM May 20, 2018Observed: 4.63 ft at 5:30AM May 20, 2018Observed: 4.59 ft at 5:45AM May 20, 2018Observed: 4.57 ft at 6:00AM May 20, 2018Observed: 4.53 ft at 6:15AM May 20, 2018Observed: 4.51 ft at 6:30AM May 20, 2018Observed: 4.47 ft at 6:45AM May 20, 2018Observed: 4.46 ft at 7:00AM May 20, 2018Observed: 4.46 ft at 7:15AM May 20, 2018Observed: 4.42 ft at 7:30AM May 20, 2018Observed: 4.37 ft at 7:45AM May 20, 2018Observed: 4.38 ft at 8:00AM May 20, 2018Observed: 4.36 ft at 8:15AM May 20, 2018Observed: 4.33 ft at 8:30AM May 20, 2018Observed: 4.33 ft at 8:45AM May 20, 2018Observed: 4.31 ft at 9:00AM May 20, 2018Observed: 4.28 ft at 9:15AM May 20, 2018Observed: 4.28 ft at 9:30AM May 20, 2018Observed: 4.25 ft at 9:45AM May 20, 2018Observed: 4.24 ft at 10:00AM May 20, 2018Observed: 4.23 ft at 10:15AM May 20, 2018Observed: 4.21 ft at 10:30AM May 20, 2018Observed: 4.19 ft at 10:45AM May 20, 2018Observed: 4.15 ft at 11:00AM May 20, 2018Observed: 4.16 ft at 11:15AM May 20, 2018Observed: 4.12 ft at 11:30AM May 20, 2018Observed: 4.12 ft at 11:45AM May 20, 2018Observed: 4.11 ft at 12:00PM May 20, 2018Observed: 4.08 ft at 12:15PM May 20, 2018Observed: 4.08 ft at 12:30PM May 20, 2018Observed: 4.06 ft at 12:45PM May 20, 2018Observed: 4.03 ft at 1:00PM May 20, 2018Observed: 4.02 ft at 1:15PM May 20, 2018Observed: 3.99 ft at 1:30PM May 20, 2018Observed: 4 ft at 1:45PM May 20, 2018Observed: 3.99 ft at 2:00PM May 20, 2018Observed: 3.96 ft at 2:15PM May 20, 2018Observed: 3.93 ft at 2:30PM May 20, 2018Observed: 3.92 ft at 2:45PM May 20, 2018Observed: 3.91 ft at 3:00PM May 20, 2018Observed: 3.89 ft at 3:15PM May 20, 2018Observed: 3.86 ft at 3:30PM May 20, 2018Observed: 3.86 ft at 3:45PM May 20, 2018Observed: 3.85 ft at 4:00PM May 20, 2018Observed: 3.82 ft at 4:15PM May 20, 2018Observed: 3.8 ft at 4:30PM May 20, 2018Observed: 3.8 ft at 4:45PM May 20, 2018Observed: 3.77 ft at 5:00PM May 20, 2018Observed: 3.77 ft at 5:15PM May 20, 2018Observed: 3.75 ft at 5:30PM May 20, 2018Observed: 3.72 ft at 5:45PM May 20, 2018Observed: 3.71 ft at 6:00PM May 20, 2018Observed: 3.7 ft at 6:15PM May 20, 2018Observed: 3.68 ft at 6:30PM May 20, 2018Observed: 3.67 ft at 6:45PM May 20, 2018Observed: 3.66 ft at 7:00PM May 20, 2018Observed: 3.64 ft at 7:15PM May 20, 2018Observed: 3.65 ft at 7:30PM May 20, 2018Observed: 3.62 ft at 7:45PM May 20, 2018Observed: 3.62 ft at 8:00PM May 20, 2018Observed: 3.6 ft at 8:15PM May 20, 2018Observed: 3.59 ft at 8:30PM May 20, 2018Observed: 3.59 ft at 8:45PM May 20, 2018Observed: 3.57 ft at 9:00PM May 20, 2018Observed: 3.56 ft at 9:15PM May 20, 2018Observed: 3.56 ft at 9:30PM May 20, 2018Observed: 3.55 ft at 9:45PM May 20, 2018Observed: 3.55 ft at 10:00PM May 20, 2018Observed: 3.52 ft at 10:15PM May 20, 2018Observed: 3.52 ft at 10:30PM May 20, 2018Observed: 3.51 ft at 10:45PM May 20, 2018Observed: 3.49 ft at 11:00PM May 20, 2018Observed: 3.48 ft at 11:15PM May 20, 2018Observed: 3.48 ft at 11:30PM May 20, 2018Observed: 3.48 ft at 11:45PM May 20, 2018Observed: 3.46 ft at 12:00AM May 21, 2018Observed: 3.45 ft at 12:15AM May 21, 2018Observed: 3.45 ft at 12:30AM May 21, 2018Observed: 3.43 ft at 12:45AM May 21, 2018Observed: 3.44 ft at 1:00AM May 21, 2018Observed: 3.43 ft at 1:15AM May 21, 2018Observed: 3.41 ft at 1:30AM May 21, 2018Observed: 3.42 ft at 1:45AM May 21, 2018Observed: 3.4 ft at 2:00AM May 21, 2018Observed: 3.4 ft at 2:15AM May 21, 2018Observed: 3.39 ft at 2:30AM May 21, 2018Observed: 3.38 ft at 2:45AM May 21, 2018Observed: 3.38 ft at 3:00AM May 21, 2018Observed: 3.38 ft at 3:15AM May 21, 2018Observed: 3.36 ft at 3:30AM May 21, 2018Observed: 3.35 ft at 3:45AM May 21, 2018Observed: 3.34 ft at 4:00AM May 21, 2018Observed: 3.34 ft at 4:15AM May 21, 2018Observed: 3.34 ft at 4:30AM May 21, 2018Observed: 3.34 ft at 4:45AM May 21, 2018Observed: 3.32 ft at 5:00AM May 21, 2018Observed: 3.32 ft at 5:15AM May 21, 2018Observed: 3.32 ft at 5:30AM May 21, 2018Observed: 3.31 ft at 5:45AM May 21, 2018Observed: 3.3 ft at 6:00AM May 21, 2018Observed: 3.31 ft at 6:15AM May 21, 2018Observed: 3.29 ft at 6:30AM May 21, 2018Observed: 3.31 ft at 6:45AM May 21, 2018Observed: 3.29 ft at 7:00AM May 21, 2018Observed: 3.28 ft at 7:15AM May 21, 2018Observed: 3.29 ft at 7:30AM May 21, 2018GMRM2(plotting HGIRG) Graph Created (8:38AM May 21, 2018)ObservedLatest observed value: 3.29 ft at 7:30 AM EDT 21-May-2018. Flood Stage is 6 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts are not available for the St. Marys River at Great Mills. Only observed stages are available for this point.
Return to Area Map
Flood Categories (in feet)
Major Flood Stage: 10
Moderate Flood Stage: 8
Flood Stage: 6
Action Stage: 5
Low Stage (in feet): -9999

Historic Crests
Currently none available.

Recent Crests
Currently none available.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:14
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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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10 Widespread flooding is occurring in Great Mills with water approaching homes and businesses.
8 Indian Bridge Road begins to flood as flooding becomes more widespread in Great Mills.
6 Flat Iron Road begins to flood with water in some yards in Great Mills.
About This Location Collapse

Latitude: 38.241667° N, Longitude: 76.503611° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 6 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
(Baltimore/Washington) Sterling Weather Forecast Office
43858 Weather Service Rd.
Sterling, VA 20166
(703) 996-2200
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Page last modified: 21-Dec-2016 10:38 PM 		Disclaimer
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