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Hydrograph River at a Glance Download
St. Marys River at Great Mills Stage (ft)Flow (cfs)Observed: 2.13 ft at 2:15AM Feb 22, 2021Observed: 2.13 ft at 2:30AM Feb 22, 2021Observed: 2.13 ft at 2:45AM Feb 22, 2021Observed: 2.13 ft at 3:00AM Feb 22, 2021Observed: 2.12 ft at 3:15AM Feb 22, 2021Observed: 2.12 ft at 3:30AM Feb 22, 2021Observed: 2.12 ft at 3:45AM Feb 22, 2021Observed: 2.12 ft at 4:00AM Feb 22, 2021Observed: 2.12 ft at 4:15AM Feb 22, 2021Observed: 2.12 ft at 4:30AM Feb 22, 2021Observed: 2.12 ft at 4:45AM Feb 22, 2021Observed: 2.12 ft at 5:00AM Feb 22, 2021Observed: 2.12 ft at 5:15AM Feb 22, 2021Observed: 2.11 ft at 5:30AM Feb 22, 2021Observed: 2.11 ft at 5:45AM Feb 22, 2021Observed: 2.11 ft at 6:00AM Feb 22, 2021Observed: 2.11 ft at 6:15AM Feb 22, 2021Observed: 2.11 ft at 6:30AM Feb 22, 2021Observed: 2.12 ft at 6:45AM Feb 22, 2021Observed: 2.1 ft at 7:00AM Feb 22, 2021Observed: 2.1 ft at 7:15AM Feb 22, 2021Observed: 2.11 ft at 7:30AM Feb 22, 2021Observed: 2.11 ft at 7:45AM Feb 22, 2021Observed: 2.1 ft at 8:00AM Feb 22, 2021Observed: 2.1 ft at 8:15AM Feb 22, 2021Observed: 2.11 ft at 8:30AM Feb 22, 2021Observed: 2.1 ft at 8:45AM Feb 22, 2021Observed: 2.1 ft at 9:00AM Feb 22, 2021Observed: 2.1 ft at 9:15AM Feb 22, 2021Observed: 2.11 ft at 9:30AM Feb 22, 2021Observed: 2.1 ft at 9:45AM Feb 22, 2021Observed: 2.1 ft at 10:00AM Feb 22, 2021Observed: 2.1 ft at 10:15AM Feb 22, 2021Observed: 2.1 ft at 10:30AM Feb 22, 2021Observed: 2.1 ft at 10:45AM Feb 22, 2021Observed: 2.1 ft at 11:00AM Feb 22, 2021Observed: 2.1 ft at 11:15AM Feb 22, 2021Observed: 2.11 ft at 11:30AM Feb 22, 2021Observed: 2.1 ft at 11:45AM Feb 22, 2021Observed: 2.1 ft at 12:00PM Feb 22, 2021Observed: 2.11 ft at 12:15PM Feb 22, 2021Observed: 2.12 ft at 12:30PM Feb 22, 2021Observed: 2.12 ft at 12:45PM Feb 22, 2021Observed: 2.13 ft at 1:00PM Feb 22, 2021Observed: 2.14 ft at 1:15PM Feb 22, 2021Observed: 2.15 ft at 1:30PM Feb 22, 2021Observed: 2.16 ft at 1:45PM Feb 22, 2021Observed: 2.18 ft at 2:00PM Feb 22, 2021Observed: 2.2 ft at 2:15PM Feb 22, 2021Observed: 2.22 ft at 2:30PM Feb 22, 2021Observed: 2.25 ft at 2:45PM Feb 22, 2021Observed: 2.29 ft at 3:00PM Feb 22, 2021Observed: 2.33 ft at 3:15PM Feb 22, 2021Observed: 2.38 ft at 3:30PM Feb 22, 2021Observed: 2.45 ft at 3:45PM Feb 22, 2021Observed: 2.52 ft at 4:00PM Feb 22, 2021Observed: 2.57 ft at 4:15PM Feb 22, 2021Observed: 2.6 ft at 4:30PM Feb 22, 2021Observed: 2.65 ft at 4:45PM Feb 22, 2021Observed: 2.7 ft at 5:00PM Feb 22, 2021Observed: 2.76 ft at 5:15PM Feb 22, 2021Observed: 2.83 ft at 5:30PM Feb 22, 2021Observed: 2.88 ft at 5:45PM Feb 22, 2021Observed: 2.91 ft at 6:00PM Feb 22, 2021Highest Observation: 2.93 ft at 6:15PM Feb 22, 2021Observed: 2.92 ft at 6:30PM Feb 22, 2021Observed: 2.91 ft at 6:45PM Feb 22, 2021Observed: 2.91 ft at 7:00PM Feb 22, 2021Observed: 2.9 ft at 7:15PM Feb 22, 2021Observed: 2.89 ft at 7:30PM Feb 22, 2021Observed: 2.89 ft at 7:45PM Feb 22, 2021Observed: 2.88 ft at 8:00PM Feb 22, 2021Observed: 2.86 ft at 8:15PM Feb 22, 2021Observed: 2.84 ft at 8:30PM Feb 22, 2021Observed: 2.83 ft at 8:45PM Feb 22, 2021Observed: 2.8 ft at 9:00PM Feb 22, 2021Observed: 2.77 ft at 9:15PM Feb 22, 2021Observed: 2.74 ft at 9:30PM Feb 22, 2021Observed: 2.71 ft at 9:45PM Feb 22, 2021Observed: 2.69 ft at 10:00PM Feb 22, 2021Observed: 2.67 ft at 10:15PM Feb 22, 2021Observed: 2.66 ft at 10:30PM Feb 22, 2021Observed: 2.64 ft at 10:45PM Feb 22, 2021Observed: 2.63 ft at 11:00PM Feb 22, 2021Observed: 2.62 ft at 11:15PM Feb 22, 2021Observed: 2.61 ft at 11:30PM Feb 22, 2021Observed: 2.59 ft at 11:45PM Feb 22, 2021Observed: 2.58 ft at 12:00AM Feb 23, 2021Observed: 2.57 ft at 12:15AM Feb 23, 2021Observed: 2.56 ft at 12:30AM Feb 23, 2021Observed: 2.56 ft at 12:45AM Feb 23, 2021Observed: 2.55 ft at 1:00AM Feb 23, 2021Observed: 2.54 ft at 1:15AM Feb 23, 2021Observed: 2.54 ft at 1:30AM Feb 23, 2021Observed: 2.53 ft at 1:45AM Feb 23, 2021Observed: 2.52 ft at 2:00AM Feb 23, 2021Observed: 2.53 ft at 2:15AM Feb 23, 2021Observed: 2.52 ft at 2:30AM Feb 23, 2021Observed: 2.52 ft at 2:45AM Feb 23, 2021Observed: 2.51 ft at 3:00AM Feb 23, 2021Observed: 2.52 ft at 3:15AM Feb 23, 2021Observed: 2.51 ft at 3:30AM Feb 23, 2021Observed: 2.5 ft at 3:45AM Feb 23, 2021Observed: 2.5 ft at 4:00AM Feb 23, 2021Observed: 2.49 ft at 4:15AM Feb 23, 2021Observed: 2.5 ft at 4:30AM Feb 23, 2021Observed: 2.49 ft at 4:45AM Feb 23, 2021Observed: 2.49 ft at 5:00AM Feb 23, 2021Observed: 2.49 ft at 5:15AM Feb 23, 2021Observed: 2.48 ft at 5:30AM Feb 23, 2021Observed: 2.48 ft at 5:45AM Feb 23, 2021Observed: 2.48 ft at 6:00AM Feb 23, 2021Observed: 2.47 ft at 6:15AM Feb 23, 2021Observed: 2.47 ft at 6:30AM Feb 23, 2021Observed: 2.47 ft at 6:45AM Feb 23, 2021Observed: 2.47 ft at 7:00AM Feb 23, 2021Observed: 2.46 ft at 7:15AM Feb 23, 2021Observed: 2.46 ft at 7:30AM Feb 23, 2021Observed: 2.46 ft at 7:45AM Feb 23, 2021Observed: 2.45 ft at 8:00AM Feb 23, 2021Observed: 2.45 ft at 8:15AM Feb 23, 2021Observed: 2.44 ft at 8:30AM Feb 23, 2021Observed: 2.44 ft at 8:45AM Feb 23, 2021Observed: 2.44 ft at 9:00AM Feb 23, 2021Observed: 2.44 ft at 9:15AM Feb 23, 2021Observed: 2.45 ft at 9:30AM Feb 23, 2021Observed: 2.44 ft at 9:45AM Feb 23, 2021Observed: 2.43 ft at 10:00AM Feb 23, 2021Observed: 2.43 ft at 10:15AM Feb 23, 2021Observed: 2.43 ft at 10:30AM Feb 23, 2021Observed: 2.43 ft at 10:45AM Feb 23, 2021Observed: 2.43 ft at 11:00AM Feb 23, 2021Observed: 2.42 ft at 11:15AM Feb 23, 2021Observed: 2.43 ft at 11:30AM Feb 23, 2021Observed: 2.42 ft at 11:45AM Feb 23, 2021Observed: 2.42 ft at 12:00PM Feb 23, 2021Observed: 2.41 ft at 12:15PM Feb 23, 2021Observed: 2.42 ft at 12:30PM Feb 23, 2021Observed: 2.42 ft at 12:45PM Feb 23, 2021Observed: 2.41 ft at 1:00PM Feb 23, 2021Observed: 2.41 ft at 1:15PM Feb 23, 2021Observed: 2.41 ft at 1:30PM Feb 23, 2021Observed: 2.41 ft at 1:45PM Feb 23, 2021Observed: 2.41 ft at 2:00PM Feb 23, 2021Observed: 2.41 ft at 2:15PM Feb 23, 2021Observed: 2.4 ft at 2:30PM Feb 23, 2021Observed: 2.4 ft at 2:45PM Feb 23, 2021Observed: 2.4 ft at 3:00PM Feb 23, 2021Observed: 2.4 ft at 3:15PM Feb 23, 2021Observed: 2.4 ft at 3:30PM Feb 23, 2021Observed: 2.39 ft at 3:45PM Feb 23, 2021Observed: 2.39 ft at 4:00PM Feb 23, 2021Observed: 2.38 ft at 4:15PM Feb 23, 2021Observed: 2.38 ft at 4:30PM Feb 23, 2021Observed: 2.38 ft at 4:45PM Feb 23, 2021Observed: 2.37 ft at 5:00PM Feb 23, 2021Observed: 2.37 ft at 5:15PM Feb 23, 2021Observed: 2.36 ft at 5:30PM Feb 23, 2021Observed: 2.36 ft at 5:45PM Feb 23, 2021Observed: 2.36 ft at 6:00PM Feb 23, 2021Observed: 2.35 ft at 6:15PM Feb 23, 2021Observed: 2.34 ft at 6:30PM Feb 23, 2021Observed: 2.35 ft at 6:45PM Feb 23, 2021Observed: 2.34 ft at 7:00PM Feb 23, 2021Observed: 2.34 ft at 7:15PM Feb 23, 2021Observed: 2.34 ft at 7:30PM Feb 23, 2021Observed: 2.33 ft at 7:45PM Feb 23, 2021Observed: 2.32 ft at 8:00PM Feb 23, 2021Observed: 2.32 ft at 8:15PM Feb 23, 2021Observed: 2.32 ft at 8:30PM Feb 23, 2021Observed: 2.32 ft at 8:45PM Feb 23, 2021Observed: 2.31 ft at 9:00PM Feb 23, 2021Observed: 2.32 ft at 9:15PM Feb 23, 2021Observed: 2.31 ft at 9:30PM Feb 23, 2021Observed: 2.31 ft at 9:45PM Feb 23, 2021Observed: 2.3 ft at 10:00PM Feb 23, 2021Observed: 2.31 ft at 10:15PM Feb 23, 2021Observed: 2.3 ft at 10:30PM Feb 23, 2021Observed: 2.3 ft at 10:45PM Feb 23, 2021Observed: 2.3 ft at 11:00PM Feb 23, 2021Observed: 2.29 ft at 11:15PM Feb 23, 2021Observed: 2.29 ft at 11:30PM Feb 23, 2021Observed: 2.29 ft at 11:45PM Feb 23, 2021Observed: 2.28 ft at 12:00AM Feb 24, 2021Observed: 2.28 ft at 12:15AM Feb 24, 2021Observed: 2.29 ft at 12:30AM Feb 24, 2021Observed: 2.28 ft at 12:45AM Feb 24, 2021Observed: 2.28 ft at 1:00AM Feb 24, 2021Observed: 2.28 ft at 1:15AM Feb 24, 2021Observed: 2.28 ft at 1:30AM Feb 24, 2021Observed: 2.27 ft at 1:45AM Feb 24, 2021Observed: 2.27 ft at 2:00AM Feb 24, 2021Observed: 2.27 ft at 2:15AM Feb 24, 2021Observed: 2.27 ft at 2:30AM Feb 24, 2021Observed: 2.26 ft at 2:45AM Feb 24, 2021Observed: 2.26 ft at 3:00AM Feb 24, 2021Observed: 2.26 ft at 3:15AM Feb 24, 2021Observed: 2.26 ft at 3:30AM Feb 24, 2021Observed: 2.26 ft at 3:45AM Feb 24, 2021Observed: 2.25 ft at 4:00AM Feb 24, 2021Observed: 2.25 ft at 4:15AM Feb 24, 2021Observed: 2.25 ft at 4:30AM Feb 24, 2021Observed: 2.25 ft at 4:45AM Feb 24, 2021Observed: 2.25 ft at 5:00AM Feb 24, 2021Observed: 2.25 ft at 5:15AM Feb 24, 2021Observed: 2.24 ft at 5:30AM Feb 24, 2021Observed: 2.24 ft at 5:45AM Feb 24, 2021Observed: 2.24 ft at 6:00AM Feb 24, 2021Observed: 2.23 ft at 6:15AM Feb 24, 2021Observed: 2.23 ft at 6:30AM Feb 24, 2021Observed: 2.23 ft at 6:45AM Feb 24, 2021Observed: 2.23 ft at 7:00AM Feb 24, 2021Observed: 2.22 ft at 7:15AM Feb 24, 2021Observed: 2.22 ft at 7:30AM Feb 24, 2021Observed: 2.22 ft at 7:45AM Feb 24, 2021Observed: 2.21 ft at 8:00AM Feb 24, 2021Observed: 2.21 ft at 8:15AM Feb 24, 2021Observed: 2.21 ft at 8:30AM Feb 24, 2021Observed: 2.2 ft at 8:45AM Feb 24, 2021Observed: 2.2 ft at 9:00AM Feb 24, 2021Observed: 2.21 ft at 9:15AM Feb 24, 2021Observed: 2.21 ft at 9:30AM Feb 24, 2021Observed: 2.2 ft at 9:45AM Feb 24, 2021Observed: 2.2 ft at 10:00AM Feb 24, 2021Observed: 2.2 ft at 10:15AM Feb 24, 2021Observed: 2.2 ft at 10:30AM Feb 24, 2021Observed: 2.2 ft at 10:45AM Feb 24, 2021Observed: 2.19 ft at 11:00AM Feb 24, 2021Observed: 2.19 ft at 11:15AM Feb 24, 2021Observed: 2.2 ft at 11:30AM Feb 24, 2021Observed: 2.19 ft at 11:45AM Feb 24, 2021Observed: 2.19 ft at 12:00PM Feb 24, 2021Observed: 2.19 ft at 12:15PM Feb 24, 2021Observed: 2.19 ft at 12:30PM Feb 24, 2021Observed: 2.19 ft at 12:45PM Feb 24, 2021Observed: 2.2 ft at 1:00PM Feb 24, 2021Observed: 2.18 ft at 1:15PM Feb 24, 2021Observed: 2.18 ft at 1:30PM Feb 24, 2021Observed: 2.19 ft at 1:45PM Feb 24, 2021Observed: 2.17 ft at 2:00PM Feb 24, 2021Observed: 2.18 ft at 2:15PM Feb 24, 2021Observed: 2.18 ft at 2:30PM Feb 24, 2021Observed: 2.18 ft at 2:45PM Feb 24, 2021Observed: 2.18 ft at 3:00PM Feb 24, 2021Observed: 2.17 ft at 3:15PM Feb 24, 2021Observed: 2.17 ft at 3:30PM Feb 24, 2021Observed: 2.18 ft at 3:45PM Feb 24, 2021Observed: 2.17 ft at 4:00PM Feb 24, 2021Observed: 2.17 ft at 4:15PM Feb 24, 2021Observed: 2.17 ft at 4:30PM Feb 24, 2021Observed: 2.17 ft at 4:45PM Feb 24, 2021Observed: 2.17 ft at 5:00PM Feb 24, 2021Observed: 2.17 ft at 5:15PM Feb 24, 2021Observed: 2.17 ft at 5:30PM Feb 24, 2021Observed: 2.16 ft at 5:45PM Feb 24, 2021Observed: 2.16 ft at 6:00PM Feb 24, 2021Observed: 2.16 ft at 6:15PM Feb 24, 2021Observed: 2.16 ft at 6:30PM Feb 24, 2021Observed: 2.16 ft at 6:45PM Feb 24, 2021Observed: 2.15 ft at 7:00PM Feb 24, 2021Observed: 2.15 ft at 7:15PM Feb 24, 2021Observed: 2.15 ft at 7:30PM Feb 24, 2021Observed: 2.15 ft at 7:45PM Feb 24, 2021Observed: 2.14 ft at 8:00PM Feb 24, 2021Observed: 2.14 ft at 8:15PM Feb 24, 2021Observed: 2.14 ft at 8:30PM Feb 24, 2021Observed: 2.14 ft at 8:45PM Feb 24, 2021Observed: 2.14 ft at 9:00PM Feb 24, 2021Observed: 2.14 ft at 9:15PM Feb 24, 2021Observed: 2.14 ft at 9:30PM Feb 24, 2021Observed: 2.14 ft at 9:45PM Feb 24, 2021Observed: 2.14 ft at 10:00PM Feb 24, 2021Observed: 2.14 ft at 10:15PM Feb 24, 2021Observed: 2.14 ft at 10:30PM Feb 24, 2021Observed: 2.13 ft at 10:45PM Feb 24, 2021Observed: 2.13 ft at 11:00PM Feb 24, 2021Observed: 2.13 ft at 11:15PM Feb 24, 2021Observed: 2.13 ft at 11:30PM Feb 24, 2021Observed: 2.13 ft at 11:45PM Feb 24, 2021Observed: 2.13 ft at 12:00AM Feb 25, 2021Observed: 2.13 ft at 12:15AM Feb 25, 2021Observed: 2.12 ft at 12:30AM Feb 25, 2021Observed: 2.13 ft at 12:45AM Feb 25, 2021Observed: 2.13 ft at 1:00AM Feb 25, 2021Observed: 2.13 ft at 1:15AM Feb 25, 2021Observed: 2.12 ft at 1:30AM Feb 25, 2021Observed: 2.12 ft at 1:45AM Feb 25, 2021Observed: 2.12 ft at 2:00AM Feb 25, 2021Observed: 2.12 ft at 2:15AM Feb 25, 2021Observed: 2.12 ft at 2:30AM Feb 25, 2021Observed: 2.12 ft at 2:45AM Feb 25, 2021Observed: 2.11 ft at 3:00AM Feb 25, 2021Observed: 2.11 ft at 3:15AM Feb 25, 2021Observed: 2.12 ft at 3:30AM Feb 25, 2021Observed: 2.11 ft at 3:45AM Feb 25, 2021Observed: 2.11 ft at 4:00AM Feb 25, 2021Observed: 2.11 ft at 4:30AM Feb 25, 2021Observed: 2.11 ft at 4:45AM Feb 25, 2021Observed: 2.11 ft at 5:00AM Feb 25, 2021Observed: 2.11 ft at 5:15AM Feb 25, 2021Observed: 2.11 ft at 5:30AM Feb 25, 2021Observed: 2.1 ft at 5:45AM Feb 25, 2021Observed: 2.1 ft at 6:00AM Feb 25, 2021Observed: 2.1 ft at 6:15AM Feb 25, 2021Observed: 2.1 ft at 6:30AM Feb 25, 2021Observed: 2.1 ft at 6:45AM Feb 25, 2021Observed: 2.1 ft at 7:00AM Feb 25, 2021Observed: 2.1 ft at 7:15AM Feb 25, 2021Observed: 2.1 ft at 7:30AM Feb 25, 2021Observed: 2.09 ft at 7:45AM Feb 25, 2021Observed: 2.09 ft at 8:00AM Feb 25, 2021Observed: 2.09 ft at 8:30AM Feb 25, 2021Observed: 2.09 ft at 8:45AM Feb 25, 2021Observed: 2.09 ft at 9:00AM Feb 25, 2021Observed: 2.08 ft at 9:15AM Feb 25, 2021Observed: 2.08 ft at 9:30AM Feb 25, 2021Observed: 2.08 ft at 9:45AM Feb 25, 2021Observed: 2.08 ft at 10:00AM Feb 25, 2021Observed: 2.08 ft at 10:15AM Feb 25, 2021Observed: 2.08 ft at 10:30AM Feb 25, 2021Observed: 2.07 ft at 10:45AM Feb 25, 2021Observed: 2.08 ft at 11:00AM Feb 25, 2021Observed: 2.07 ft at 11:15AM Feb 25, 2021Observed: 2.08 ft at 11:30AM Feb 25, 2021Observed: 2.07 ft at 11:45AM Feb 25, 2021Observed: 2.08 ft at 12:00PM Feb 25, 2021Observed: 2.06 ft at 12:15PM Feb 25, 2021Observed: 2.06 ft at 12:30PM Feb 25, 2021Observed: 2.07 ft at 12:45PM Feb 25, 2021Observed: 2.07 ft at 1:00PM Feb 25, 2021Observed: 2.06 ft at 1:15PM Feb 25, 2021Observed: 2.06 ft at 1:30PM Feb 25, 2021Observed: 2.06 ft at 1:45PM Feb 25, 2021Observed: 2.06 ft at 2:00PM Feb 25, 2021Observed: 2.07 ft at 2:15PM Feb 25, 2021Observed: 2.06 ft at 2:30PM Feb 25, 2021Observed: 2.06 ft at 2:45PM Feb 25, 2021Observed: 2.06 ft at 3:00PM Feb 25, 2021Observed: 2.06 ft at 3:15PM Feb 25, 2021Observed: 2.06 ft at 3:30PM Feb 25, 2021Observed: 2.06 ft at 3:45PM Feb 25, 2021Observed: 2.05 ft at 4:00PM Feb 25, 2021Observed: 2.05 ft at 4:15PM Feb 25, 2021Observed: 2.05 ft at 4:30PM Feb 25, 2021Observed: 2.04 ft at 4:45PM Feb 25, 2021Observed: 2.05 ft at 5:00PM Feb 25, 2021Observed: 2.05 ft at 5:15PM Feb 25, 2021Observed: 2.05 ft at 5:30PM Feb 25, 2021Observed: 2.04 ft at 5:45PM Feb 25, 2021Observed: 2.04 ft at 6:00PM Feb 25, 2021Observed: 2.04 ft at 6:15PM Feb 25, 2021Observed: 2.04 ft at 6:30PM Feb 25, 2021Observed: 2.03 ft at 6:45PM Feb 25, 2021Observed: 2.03 ft at 7:00PM Feb 25, 2021Observed: 2.03 ft at 7:15PM Feb 25, 2021Observed: 2.03 ft at 7:30PM Feb 25, 2021Observed: 2.03 ft at 7:45PM Feb 25, 2021Observed: 2.03 ft at 8:00PM Feb 25, 2021Observed: 2.03 ft at 8:15PM Feb 25, 2021Observed: 2.03 ft at 8:30PM Feb 25, 2021Observed: 2.04 ft at 8:45PM Feb 25, 2021Observed: 2.04 ft at 9:00PM Feb 25, 2021Observed: 2.03 ft at 9:15PM Feb 25, 2021Observed: 2.04 ft at 9:30PM Feb 25, 2021Observed: 2.03 ft at 9:45PM Feb 25, 2021Observed: 2.03 ft at 10:00PM Feb 25, 2021Observed: 2.03 ft at 10:15PM Feb 25, 2021Observed: 2.03 ft at 10:30PM Feb 25, 2021Observed: 2.03 ft at 10:45PM Feb 25, 2021Observed: 2.03 ft at 11:00PM Feb 25, 2021Observed: 2.03 ft at 11:15PM Feb 25, 2021Observed: 2.03 ft at 11:30PM Feb 25, 2021Observed: 2.02 ft at 11:45PM Feb 25, 2021Observed: 2.03 ft at 12:00AM Feb 26, 2021Observed: 2.03 ft at 12:15AM Feb 26, 2021Observed: 2.02 ft at 12:30AM Feb 26, 2021Observed: 2.02 ft at 12:45AM Feb 26, 2021Observed: 2.02 ft at 1:00AM Feb 26, 2021Observed: 2.02 ft at 1:15AM Feb 26, 2021Observed: 2.02 ft at 1:30AM Feb 26, 2021Observed: 2.02 ft at 1:45AM Feb 26, 2021Observed: 2.02 ft at 2:00AM Feb 26, 2021Observed: 2.02 ft at 2:15AM Feb 26, 2021Observed: 2.02 ft at 2:30AM Feb 26, 2021Observed: 2.02 ft at 2:45AM Feb 26, 2021Observed: 2.02 ft at 3:00AM Feb 26, 2021Observed: 2.01 ft at 3:15AM Feb 26, 2021Observed: 2.02 ft at 3:30AM Feb 26, 2021Observed: 2.01 ft at 3:45AM Feb 26, 2021Observed: 2.01 ft at 4:00AM Feb 26, 2021Observed: 2.01 ft at 4:15AM Feb 26, 2021Observed: 2.01 ft at 4:30AM Feb 26, 2021Observed: 2.01 ft at 4:45AM Feb 26, 2021Observed: 2.01 ft at 5:00AM Feb 26, 2021Observed: 2.01 ft at 5:15AM Feb 26, 2021Observed: 2.01 ft at 5:30AM Feb 26, 2021Observed: 2.01 ft at 5:45AM Feb 26, 2021Observed: 2.01 ft at 6:00AM Feb 26, 2021Observed: 2.01 ft at 6:15AM Feb 26, 2021Observed: 2 ft at 6:30AM Feb 26, 2021Observed: 2 ft at 6:45AM Feb 26, 2021Observed: 2.01 ft at 7:00AM Feb 26, 2021Observed: 2 ft at 7:15AM Feb 26, 2021Observed: 2 ft at 7:30AM Feb 26, 2021Observed: 1.99 ft at 7:45AM Feb 26, 2021Observed: 1.99 ft at 8:00AM Feb 26, 2021Observed: 1.99 ft at 8:15AM Feb 26, 2021Observed: 1.98 ft at 8:30AM Feb 26, 2021Observed: 1.99 ft at 8:45AM Feb 26, 2021Observed: 1.99 ft at 9:00AM Feb 26, 2021Observed: 1.99 ft at 9:15AM Feb 26, 2021Observed: 1.99 ft at 9:30AM Feb 26, 2021Observed: 1.98 ft at 9:45AM Feb 26, 2021Observed: 1.99 ft at 10:00AM Feb 26, 2021Observed: 1.99 ft at 10:15AM Feb 26, 2021Observed: 1.99 ft at 10:30AM Feb 26, 2021Observed: 1.98 ft at 10:45AM Feb 26, 2021Observed: 1.98 ft at 11:00AM Feb 26, 2021Observed: 1.98 ft at 11:15AM Feb 26, 2021Observed: 1.99 ft at 11:30AM Feb 26, 2021Observed: 1.98 ft at 11:45AM Feb 26, 2021Observed: 1.99 ft at 12:00PM Feb 26, 2021Observed: 1.98 ft at 12:15PM Feb 26, 2021Observed: 1.98 ft at 12:30PM Feb 26, 2021Observed: 1.97 ft at 12:45PM Feb 26, 2021Observed: 1.98 ft at 1:00PM Feb 26, 2021Observed: 1.98 ft at 1:15PM Feb 26, 2021Observed: 1.98 ft at 1:30PM Feb 26, 2021Observed: 1.99 ft at 1:45PM Feb 26, 2021Observed: 1.98 ft at 2:00PM Feb 26, 2021Observed: 1.98 ft at 2:15PM Feb 26, 2021Observed: 1.98 ft at 2:30PM Feb 26, 2021Observed: 1.98 ft at 2:45PM Feb 26, 2021Observed: 1.98 ft at 3:00PM Feb 26, 2021Observed: 1.98 ft at 3:15PM Feb 26, 2021Observed: 1.98 ft at 3:30PM Feb 26, 2021Observed: 1.98 ft at 3:45PM Feb 26, 2021Observed: 1.97 ft at 4:00PM Feb 26, 2021Observed: 1.97 ft at 4:15PM Feb 26, 2021Observed: 1.97 ft at 4:30PM Feb 26, 2021Observed: 1.97 ft at 4:45PM Feb 26, 2021Observed: 1.97 ft at 5:00PM Feb 26, 2021Observed: 1.97 ft at 5:15PM Feb 26, 2021Observed: 1.97 ft at 5:30PM Feb 26, 2021Observed: 1.97 ft at 5:45PM Feb 26, 2021Observed: 1.97 ft at 6:00PM Feb 26, 2021Observed: 1.97 ft at 6:15PM Feb 26, 2021Observed: 1.97 ft at 6:30PM Feb 26, 2021Observed: 1.96 ft at 6:45PM Feb 26, 2021Observed: 1.97 ft at 7:00PM Feb 26, 2021Observed: 1.97 ft at 7:15PM Feb 26, 2021Observed: 1.96 ft at 7:30PM Feb 26, 2021Observed: 1.96 ft at 7:45PM Feb 26, 2021Observed: 1.97 ft at 8:00PM Feb 26, 2021Observed: 1.97 ft at 8:15PM Feb 26, 2021Observed: 1.97 ft at 8:30PM Feb 26, 2021Observed: 1.97 ft at 8:45PM Feb 26, 2021Observed: 1.97 ft at 9:00PM Feb 26, 2021Observed: 1.97 ft at 9:15PM Feb 26, 2021Observed: 1.97 ft at 9:30PM Feb 26, 2021Observed: 1.97 ft at 9:45PM Feb 26, 2021Observed: 1.98 ft at 10:00PM Feb 26, 2021Observed: 1.98 ft at 10:15PM Feb 26, 2021Observed: 1.98 ft at 10:30PM Feb 26, 2021Observed: 1.99 ft at 10:45PM Feb 26, 2021Observed: 1.99 ft at 11:00PM Feb 26, 2021Observed: 2 ft at 11:15PM Feb 26, 2021Observed: 2 ft at 11:30PM Feb 26, 2021Observed: 2 ft at 11:45PM Feb 26, 2021Observed: 2.01 ft at 12:00AM Feb 27, 2021Observed: 2.01 ft at 12:15AM Feb 27, 2021Observed: 2.02 ft at 12:30AM Feb 27, 2021Observed: 2.02 ft at 12:45AM Feb 27, 2021Observed: 2.03 ft at 1:00AM Feb 27, 2021USGS--Water Resources of the United StatesGMRM2(plotting HGIRG) Graph Created (2:10AM Feb 27, 2021)ObservedLatest observed value: 2.03 ft at 1:00 AM EST 27-Feb-2021. Flood Stage is 6 ft
Printable Image
About this graph
Tabular Data (UTC)
Tabular Data (EST)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Stage may be affected by ice.

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
(1) 13.34 ft on 08/20/1969
(2) 12.98 ft on 08/28/2011
(3) 12.82 ft on 09/16/1999
(4) 12.08 ft on 07/30/1960
(5) 11.77 ft on 08/13/1955
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 11.57 ft on 08/04/2020
(2) 7.45 ft on 07/08/2019 (P)
(3) 6.00 ft on 11/25/2018
(4) 6.19 ft on 07/22/2018
(5) 7.90 ft on 05/20/2018
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(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: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.
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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.
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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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