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Hydrograph River at a Glance Download
St. Marys River at Great Mills Stage (ft)Flow (cfs)Highest Observation: 1.64 ft at 10:30PM Nov 12, 2019Highest Observation: 1.64 ft at 10:45PM Nov 12, 2019Highest Observation: 1.64 ft at 11:00PM Nov 12, 2019Highest Observation: 1.64 ft at 11:15PM Nov 12, 2019Observed: 1.63 ft at 11:30PM Nov 12, 2019Observed: 1.63 ft at 11:45PM Nov 12, 2019Observed: 1.63 ft at 12:00AM Nov 13, 2019Observed: 1.63 ft at 12:15AM Nov 13, 2019Observed: 1.62 ft at 12:30AM Nov 13, 2019Observed: 1.62 ft at 12:45AM Nov 13, 2019Observed: 1.62 ft at 1:00AM Nov 13, 2019Observed: 1.61 ft at 1:15AM Nov 13, 2019Observed: 1.61 ft at 1:30AM Nov 13, 2019Observed: 1.61 ft at 1:45AM Nov 13, 2019Observed: 1.6 ft at 2:00AM Nov 13, 2019Observed: 1.6 ft at 2:15AM Nov 13, 2019Observed: 1.6 ft at 2:30AM Nov 13, 2019Observed: 1.59 ft at 2:45AM Nov 13, 2019Observed: 1.59 ft at 3:00AM Nov 13, 2019Observed: 1.59 ft at 3:15AM Nov 13, 2019Observed: 1.59 ft at 3:30AM Nov 13, 2019Observed: 1.58 ft at 3:45AM Nov 13, 2019Observed: 1.58 ft at 4:00AM Nov 13, 2019Observed: 1.57 ft at 4:15AM Nov 13, 2019Observed: 1.57 ft at 4:30AM Nov 13, 2019Observed: 1.57 ft at 4:45AM Nov 13, 2019Observed: 1.57 ft at 5:00AM Nov 13, 2019Observed: 1.57 ft at 5:15AM Nov 13, 2019Observed: 1.56 ft at 5:30AM Nov 13, 2019Observed: 1.56 ft at 5:45AM Nov 13, 2019Observed: 1.56 ft at 6:00AM Nov 13, 2019Observed: 1.56 ft at 6:15AM Nov 13, 2019Observed: 1.56 ft at 6:30AM Nov 13, 2019Observed: 1.55 ft at 6:45AM Nov 13, 2019Observed: 1.55 ft at 7:00AM Nov 13, 2019Observed: 1.55 ft at 7:15AM Nov 13, 2019Observed: 1.55 ft at 7:30AM Nov 13, 2019Observed: 1.55 ft at 7:45AM Nov 13, 2019Observed: 1.54 ft at 8:00AM Nov 13, 2019Observed: 1.55 ft at 8:15AM Nov 13, 2019Observed: 1.54 ft at 8:30AM Nov 13, 2019Observed: 1.54 ft at 8:45AM Nov 13, 2019Observed: 1.54 ft at 9:00AM Nov 13, 2019Observed: 1.53 ft at 9:15AM Nov 13, 2019Observed: 1.53 ft at 9:30AM Nov 13, 2019Observed: 1.53 ft at 9:45AM Nov 13, 2019Observed: 1.53 ft at 10:00AM Nov 13, 2019Observed: 1.53 ft at 10:15AM Nov 13, 2019Observed: 1.53 ft at 10:30AM Nov 13, 2019Observed: 1.52 ft at 10:45AM Nov 13, 2019Observed: 1.52 ft at 11:00AM Nov 13, 2019Observed: 1.53 ft at 11:15AM Nov 13, 2019Observed: 1.53 ft at 11:30AM Nov 13, 2019Observed: 1.53 ft at 11:45AM Nov 13, 2019Observed: 1.52 ft at 12:00PM Nov 13, 2019Observed: 1.52 ft at 12:15PM Nov 13, 2019Observed: 1.51 ft at 12:30PM Nov 13, 2019Observed: 1.51 ft at 12:45PM Nov 13, 2019Observed: 1.51 ft at 1:00PM Nov 13, 2019Observed: 1.52 ft at 1:15PM Nov 13, 2019Observed: 1.52 ft at 1:30PM Nov 13, 2019Observed: 1.52 ft at 1:45PM Nov 13, 2019Observed: 1.52 ft at 2:00PM Nov 13, 2019Observed: 1.52 ft at 2:15PM Nov 13, 2019Observed: 1.52 ft at 2:30PM Nov 13, 2019Observed: 1.52 ft at 2:45PM Nov 13, 2019Observed: 1.52 ft at 3:00PM Nov 13, 2019Observed: 1.52 ft at 3:15PM Nov 13, 2019Observed: 1.52 ft at 3:30PM Nov 13, 2019Observed: 1.52 ft at 3:45PM Nov 13, 2019Observed: 1.52 ft at 4:00PM Nov 13, 2019Observed: 1.51 ft at 4:15PM Nov 13, 2019Observed: 1.52 ft at 4:30PM Nov 13, 2019Observed: 1.52 ft at 4:45PM Nov 13, 2019Observed: 1.52 ft at 5:00PM Nov 13, 2019Observed: 1.52 ft at 5:15PM Nov 13, 2019Observed: 1.51 ft at 5:30PM Nov 13, 2019Observed: 1.51 ft at 5:45PM Nov 13, 2019Observed: 1.52 ft at 6:00PM Nov 13, 2019Observed: 1.51 ft at 6:15PM Nov 13, 2019Observed: 1.52 ft at 6:30PM Nov 13, 2019Observed: 1.51 ft at 6:45PM Nov 13, 2019Observed: 1.51 ft at 7:00PM Nov 13, 2019Observed: 1.51 ft at 7:15PM Nov 13, 2019Observed: 1.52 ft at 7:30PM Nov 13, 2019Observed: 1.51 ft at 7:45PM Nov 13, 2019Observed: 1.51 ft at 8:00PM Nov 13, 2019Observed: 1.51 ft at 8:15PM Nov 13, 2019Observed: 1.51 ft at 8:30PM Nov 13, 2019Observed: 1.51 ft at 8:45PM Nov 13, 2019Observed: 1.51 ft at 9:00PM Nov 13, 2019Observed: 1.51 ft at 9:15PM Nov 13, 2019Observed: 1.51 ft at 9:30PM Nov 13, 2019Observed: 1.51 ft at 9:45PM Nov 13, 2019Observed: 1.51 ft at 10:00PM Nov 13, 2019Observed: 1.51 ft at 10:15PM Nov 13, 2019Observed: 1.51 ft at 10:30PM Nov 13, 2019Observed: 1.5 ft at 10:45PM Nov 13, 2019Observed: 1.5 ft at 11:00PM Nov 13, 2019Observed: 1.5 ft at 11:15PM Nov 13, 2019Observed: 1.5 ft at 11:30PM Nov 13, 2019Observed: 1.5 ft at 11:45PM Nov 13, 2019Observed: 1.5 ft at 12:00AM Nov 14, 2019Observed: 1.5 ft at 12:15AM Nov 14, 2019Observed: 1.5 ft at 12:30AM Nov 14, 2019Observed: 1.5 ft at 12:45AM Nov 14, 2019Observed: 1.5 ft at 1:00AM Nov 14, 2019Observed: 1.5 ft at 1:15AM Nov 14, 2019Observed: 1.5 ft at 1:30AM Nov 14, 2019Observed: 1.5 ft at 1:45AM Nov 14, 2019Observed: 1.5 ft at 2:00AM Nov 14, 2019Observed: 1.5 ft at 2:15AM Nov 14, 2019Observed: 1.5 ft at 2:30AM Nov 14, 2019Observed: 1.5 ft at 2:45AM Nov 14, 2019Observed: 1.5 ft at 3:00AM Nov 14, 2019Observed: 1.5 ft at 3:15AM Nov 14, 2019Observed: 1.5 ft at 3:30AM Nov 14, 2019Observed: 1.5 ft at 3:45AM Nov 14, 2019Observed: 1.5 ft at 4:00AM Nov 14, 2019Observed: 1.5 ft at 4:15AM Nov 14, 2019Observed: 1.49 ft at 4:30AM Nov 14, 2019Observed: 1.49 ft at 4:45AM Nov 14, 2019Observed: 1.49 ft at 5:00AM Nov 14, 2019Observed: 1.49 ft at 5:15AM Nov 14, 2019Observed: 1.49 ft at 5:30AM Nov 14, 2019Observed: 1.49 ft at 5:45AM Nov 14, 2019Observed: 1.49 ft at 6:00AM Nov 14, 2019Observed: 1.49 ft at 6:15AM Nov 14, 2019Observed: 1.49 ft at 6:30AM Nov 14, 2019Observed: 1.49 ft at 6:45AM Nov 14, 2019Observed: 1.49 ft at 7:00AM Nov 14, 2019Observed: 1.49 ft at 7:15AM Nov 14, 2019Observed: 1.49 ft at 7:30AM Nov 14, 2019Observed: 1.49 ft at 7:45AM Nov 14, 2019Observed: 1.49 ft at 8:00AM Nov 14, 2019Observed: 1.49 ft at 8:15AM Nov 14, 2019Observed: 1.49 ft at 8:45AM Nov 14, 2019Observed: 1.5 ft at 9:00AM Nov 14, 2019Observed: 1.49 ft at 9:15AM Nov 14, 2019Observed: 1.49 ft at 9:30AM Nov 14, 2019Observed: 1.49 ft at 9:45AM Nov 14, 2019Observed: 1.49 ft at 10:00AM Nov 14, 2019Observed: 1.49 ft at 10:15AM Nov 14, 2019Observed: 1.48 ft at 10:30AM Nov 14, 2019Observed: 1.49 ft at 10:45AM Nov 14, 2019Observed: 1.49 ft at 11:00AM Nov 14, 2019Observed: 1.49 ft at 11:15AM Nov 14, 2019Observed: 1.49 ft at 11:30AM Nov 14, 2019Observed: 1.49 ft at 11:45AM Nov 14, 2019Observed: 1.49 ft at 12:00PM Nov 14, 2019Observed: 1.49 ft at 12:15PM Nov 14, 2019Observed: 1.49 ft at 12:30PM Nov 14, 2019Observed: 1.49 ft at 12:45PM Nov 14, 2019Observed: 1.49 ft at 1:00PM Nov 14, 2019Observed: 1.49 ft at 1:15PM Nov 14, 2019Observed: 1.49 ft at 1:30PM Nov 14, 2019Observed: 1.49 ft at 1:45PM Nov 14, 2019Observed: 1.49 ft at 2:00PM Nov 14, 2019Observed: 1.49 ft at 2:15PM Nov 14, 2019Observed: 1.49 ft at 2:30PM Nov 14, 2019Observed: 1.49 ft at 2:45PM Nov 14, 2019Observed: 1.49 ft at 3:00PM Nov 14, 2019Observed: 1.49 ft at 3:15PM Nov 14, 2019Observed: 1.48 ft at 3:30PM Nov 14, 2019Observed: 1.48 ft at 3:45PM Nov 14, 2019Observed: 1.48 ft at 4:00PM Nov 14, 2019Observed: 1.48 ft at 4:15PM Nov 14, 2019Observed: 1.48 ft at 4:30PM Nov 14, 2019Observed: 1.48 ft at 4:45PM Nov 14, 2019Observed: 1.48 ft at 5:00PM Nov 14, 2019Observed: 1.48 ft at 5:15PM Nov 14, 2019Observed: 1.48 ft at 5:30PM Nov 14, 2019Observed: 1.48 ft at 5:45PM Nov 14, 2019Observed: 1.48 ft at 6:00PM Nov 14, 2019Observed: 1.48 ft at 6:15PM Nov 14, 2019Observed: 1.48 ft at 6:30PM Nov 14, 2019Observed: 1.48 ft at 6:45PM Nov 14, 2019Observed: 1.48 ft at 7:00PM Nov 14, 2019Observed: 1.48 ft at 7:15PM Nov 14, 2019Observed: 1.48 ft at 7:30PM Nov 14, 2019Observed: 1.48 ft at 7:45PM Nov 14, 2019Observed: 1.48 ft at 8:00PM Nov 14, 2019Observed: 1.48 ft at 8:15PM Nov 14, 2019Observed: 1.48 ft at 8:30PM Nov 14, 2019Observed: 1.48 ft at 8:45PM Nov 14, 2019Observed: 1.48 ft at 9:00PM Nov 14, 2019Observed: 1.48 ft at 9:15PM Nov 14, 2019Observed: 1.48 ft at 9:30PM Nov 14, 2019Observed: 1.48 ft at 9:45PM Nov 14, 2019Observed: 1.48 ft at 10:00PM Nov 14, 2019Observed: 1.48 ft at 10:15PM Nov 14, 2019Observed: 1.48 ft at 10:30PM Nov 14, 2019Observed: 1.48 ft at 10:45PM Nov 14, 2019Observed: 1.48 ft at 11:00PM Nov 14, 2019Observed: 1.48 ft at 11:15PM Nov 14, 2019Observed: 1.48 ft at 11:30PM Nov 14, 2019Observed: 1.49 ft at 11:45PM Nov 14, 2019Observed: 1.48 ft at 12:00AM Nov 15, 2019Observed: 1.49 ft at 12:15AM Nov 15, 2019Observed: 1.48 ft at 12:30AM Nov 15, 2019Observed: 1.48 ft at 12:45AM Nov 15, 2019Observed: 1.48 ft at 1:00AM Nov 15, 2019Observed: 1.48 ft at 1:15AM Nov 15, 2019Observed: 1.48 ft at 1:30AM Nov 15, 2019Observed: 1.48 ft at 1:45AM Nov 15, 2019Observed: 1.48 ft at 2:00AM Nov 15, 2019Observed: 1.48 ft at 2:15AM Nov 15, 2019Observed: 1.48 ft at 2:30AM Nov 15, 2019Observed: 1.48 ft at 2:45AM Nov 15, 2019Observed: 1.48 ft at 3:00AM Nov 15, 2019Observed: 1.48 ft at 3:15AM Nov 15, 2019Observed: 1.48 ft at 3:30AM Nov 15, 2019Observed: 1.49 ft at 3:45AM Nov 15, 2019Observed: 1.48 ft at 4:00AM Nov 15, 2019Observed: 1.48 ft at 4:15AM Nov 15, 2019Observed: 1.48 ft at 4:30AM Nov 15, 2019Observed: 1.48 ft at 4:45AM Nov 15, 2019Observed: 1.48 ft at 5:00AM Nov 15, 2019Observed: 1.48 ft at 5:15AM Nov 15, 2019Observed: 1.48 ft at 5:30AM Nov 15, 2019Observed: 1.48 ft at 5:45AM Nov 15, 2019Observed: 1.48 ft at 6:00AM Nov 15, 2019Observed: 1.48 ft at 6:15AM Nov 15, 2019Observed: 1.48 ft at 6:30AM Nov 15, 2019Observed: 1.48 ft at 6:45AM Nov 15, 2019Observed: 1.48 ft at 7:00AM Nov 15, 2019Observed: 1.48 ft at 7:15AM Nov 15, 2019Observed: 1.48 ft at 7:30AM Nov 15, 2019Observed: 1.48 ft at 7:45AM Nov 15, 2019Observed: 1.48 ft at 8:00AM Nov 15, 2019Observed: 1.48 ft at 8:15AM Nov 15, 2019Observed: 1.48 ft at 8:30AM Nov 15, 2019Observed: 1.48 ft at 8:45AM Nov 15, 2019Observed: 1.48 ft at 9:00AM Nov 15, 2019Observed: 1.49 ft at 9:15AM Nov 15, 2019Observed: 1.49 ft at 9:30AM Nov 15, 2019Observed: 1.48 ft at 9:45AM Nov 15, 2019Observed: 1.48 ft at 10:00AM Nov 15, 2019Observed: 1.49 ft at 10:15AM Nov 15, 2019Observed: 1.49 ft at 10:30AM Nov 15, 2019Observed: 1.49 ft at 10:45AM Nov 15, 2019Observed: 1.49 ft at 11:00AM Nov 15, 2019Observed: 1.49 ft at 11:15AM Nov 15, 2019Observed: 1.49 ft at 11:30AM Nov 15, 2019Observed: 1.49 ft at 11:45AM Nov 15, 2019Observed: 1.49 ft at 12:00PM Nov 15, 2019Observed: 1.5 ft at 12:15PM Nov 15, 2019Observed: 1.49 ft at 12:30PM Nov 15, 2019Observed: 1.49 ft at 12:45PM Nov 15, 2019Observed: 1.49 ft at 1:00PM Nov 15, 2019Observed: 1.49 ft at 1:15PM Nov 15, 2019Observed: 1.49 ft at 1:30PM Nov 15, 2019Observed: 1.49 ft at 1:45PM Nov 15, 2019Observed: 1.49 ft at 2:00PM Nov 15, 2019Observed: 1.49 ft at 2:15PM Nov 15, 2019Observed: 1.49 ft at 2:30PM Nov 15, 2019Observed: 1.49 ft at 2:45PM Nov 15, 2019Observed: 1.49 ft at 3:00PM Nov 15, 2019Observed: 1.49 ft at 3:15PM Nov 15, 2019Observed: 1.49 ft at 3:30PM Nov 15, 2019Observed: 1.49 ft at 3:45PM Nov 15, 2019Observed: 1.49 ft at 4:00PM Nov 15, 2019Observed: 1.49 ft at 4:15PM Nov 15, 2019Observed: 1.49 ft at 4:30PM Nov 15, 2019Observed: 1.49 ft at 4:45PM Nov 15, 2019Observed: 1.49 ft at 5:00PM Nov 15, 2019Observed: 1.49 ft at 5:15PM Nov 15, 2019Observed: 1.49 ft at 5:30PM Nov 15, 2019Observed: 1.49 ft at 5:45PM Nov 15, 2019Observed: 1.48 ft at 6:00PM Nov 15, 2019Observed: 1.48 ft at 6:15PM Nov 15, 2019Observed: 1.48 ft at 6:30PM Nov 15, 2019Observed: 1.49 ft at 6:45PM Nov 15, 2019Observed: 1.49 ft at 7:00PM Nov 15, 2019Observed: 1.48 ft at 7:15PM Nov 15, 2019Observed: 1.48 ft at 7:30PM Nov 15, 2019Observed: 1.48 ft at 7:45PM Nov 15, 2019Observed: 1.49 ft at 8:00PM Nov 15, 2019Observed: 1.48 ft at 8:15PM Nov 15, 2019Observed: 1.48 ft at 8:30PM Nov 15, 2019Observed: 1.48 ft at 8:45PM Nov 15, 2019Observed: 1.48 ft at 9:00PM Nov 15, 2019Observed: 1.48 ft at 9:15PM Nov 15, 2019Observed: 1.48 ft at 9:30PM Nov 15, 2019Observed: 1.48 ft at 9:45PM Nov 15, 2019Observed: 1.48 ft at 10:00PM Nov 15, 2019Observed: 1.48 ft at 10:15PM Nov 15, 2019Observed: 1.48 ft at 10:30PM Nov 15, 2019Observed: 1.48 ft at 10:45PM Nov 15, 2019Observed: 1.48 ft at 11:00PM Nov 15, 2019Observed: 1.48 ft at 11:15PM Nov 15, 2019Observed: 1.48 ft at 11:30PM Nov 15, 2019Observed: 1.48 ft at 11:45PM Nov 15, 2019Observed: 1.48 ft at 12:00AM Nov 16, 2019Observed: 1.48 ft at 12:15AM Nov 16, 2019Observed: 1.49 ft at 12:30AM Nov 16, 2019Observed: 1.48 ft at 12:45AM Nov 16, 2019Observed: 1.49 ft at 1:00AM Nov 16, 2019Observed: 1.49 ft at 1:15AM Nov 16, 2019Observed: 1.48 ft at 1:30AM Nov 16, 2019Observed: 1.48 ft at 1:45AM Nov 16, 2019Observed: 1.48 ft at 2:00AM Nov 16, 2019Observed: 1.48 ft at 2:15AM Nov 16, 2019Observed: 1.47 ft at 2:30AM Nov 16, 2019Observed: 1.46 ft at 2:45AM Nov 16, 2019Observed: 1.48 ft at 3:00AM Nov 16, 2019Observed: 1.48 ft at 3:15AM Nov 16, 2019Observed: 1.47 ft at 3:30AM Nov 16, 2019Observed: 1.47 ft at 3:45AM Nov 16, 2019Observed: 1.48 ft at 4:00AM Nov 16, 2019Observed: 1.49 ft at 4:15AM Nov 16, 2019Observed: 1.47 ft at 4:30AM Nov 16, 2019Observed: 1.48 ft at 4:45AM Nov 16, 2019Observed: 1.48 ft at 5:00AM Nov 16, 2019Observed: 1.48 ft at 5:15AM Nov 16, 2019Observed: 1.48 ft at 5:30AM Nov 16, 2019Observed: 1.47 ft at 5:45AM Nov 16, 2019Observed: 1.46 ft at 6:00AM Nov 16, 2019Observed: 1.48 ft at 6:15AM Nov 16, 2019Observed: 1.48 ft at 6:30AM Nov 16, 2019Observed: 1.48 ft at 6:45AM Nov 16, 2019Observed: 1.46 ft at 7:00AM Nov 16, 2019Observed: 1.48 ft at 7:15AM Nov 16, 2019Observed: 1.48 ft at 7:30AM Nov 16, 2019Observed: 1.48 ft at 7:45AM Nov 16, 2019Observed: 1.47 ft at 8:00AM Nov 16, 2019Observed: 1.48 ft at 8:15AM Nov 16, 2019Observed: 1.46 ft at 8:30AM Nov 16, 2019Observed: 1.46 ft at 8:45AM Nov 16, 2019Observed: 1.46 ft at 9:00AM Nov 16, 2019Observed: 1.47 ft at 9:15AM Nov 16, 2019Observed: 1.47 ft at 9:30AM Nov 16, 2019Observed: 1.47 ft at 9:45AM Nov 16, 2019Observed: 1.47 ft at 10:00AM Nov 16, 2019Observed: 1.48 ft at 10:15AM Nov 16, 2019Observed: 1.48 ft at 10:30AM Nov 16, 2019Observed: 1.47 ft at 10:45AM Nov 16, 2019Observed: 1.48 ft at 11:00AM Nov 16, 2019Observed: 1.47 ft at 11:15AM Nov 16, 2019Observed: 1.48 ft at 11:30AM Nov 16, 2019Observed: 1.46 ft at 11:45AM Nov 16, 2019Observed: 1.47 ft at 12:00PM Nov 16, 2019Observed: 1.45 ft at 12:15PM Nov 16, 2019Observed: 1.45 ft at 12:30PM Nov 16, 2019Observed: 1.45 ft at 12:45PM Nov 16, 2019Observed: 1.46 ft at 1:00PM Nov 16, 2019Observed: 1.47 ft at 1:15PM Nov 16, 2019Observed: 1.47 ft at 1:30PM Nov 16, 2019Observed: 1.47 ft at 1:45PM Nov 16, 2019Observed: 1.47 ft at 2:00PM Nov 16, 2019Observed: 1.47 ft at 2:15PM Nov 16, 2019Observed: 1.47 ft at 2:30PM Nov 16, 2019Observed: 1.47 ft at 2:45PM Nov 16, 2019Observed: 1.47 ft at 3:00PM Nov 16, 2019Observed: 1.47 ft at 3:15PM Nov 16, 2019Observed: 1.47 ft at 3:30PM Nov 16, 2019Observed: 1.47 ft at 3:45PM Nov 16, 2019Observed: 1.47 ft at 4:00PM Nov 16, 2019Observed: 1.48 ft at 4:15PM Nov 16, 2019Observed: 1.47 ft at 4:30PM Nov 16, 2019Observed: 1.47 ft at 4:45PM Nov 16, 2019Observed: 1.47 ft at 5:00PM Nov 16, 2019Observed: 1.48 ft at 5:15PM Nov 16, 2019Observed: 1.47 ft at 5:30PM Nov 16, 2019Observed: 1.47 ft at 5:45PM Nov 16, 2019Observed: 1.47 ft at 6:00PM Nov 16, 2019Observed: 1.46 ft at 6:15PM Nov 16, 2019Observed: 1.47 ft at 6:30PM Nov 16, 2019Observed: 1.47 ft at 6:45PM Nov 16, 2019Observed: 1.47 ft at 7:00PM Nov 16, 2019Observed: 1.47 ft at 7:15PM Nov 16, 2019Observed: 1.44 ft at 7:30PM Nov 16, 2019Observed: 1.47 ft at 7:45PM Nov 16, 2019Observed: 1.47 ft at 8:00PM Nov 16, 2019Observed: 1.47 ft at 8:15PM Nov 16, 2019Observed: 1.45 ft at 8:30PM Nov 16, 2019Observed: 1.47 ft at 8:45PM Nov 16, 2019Observed: 1.45 ft at 9:00PM Nov 16, 2019Observed: 1.46 ft at 9:15PM Nov 16, 2019Observed: 1.47 ft at 9:30PM Nov 16, 2019Observed: 1.46 ft at 9:45PM Nov 16, 2019Observed: 1.47 ft at 10:00PM Nov 16, 2019Observed: 1.47 ft at 10:15PM Nov 16, 2019Observed: 1.47 ft at 10:30PM Nov 16, 2019Observed: 1.45 ft at 10:45PM Nov 16, 2019Observed: 1.46 ft at 11:00PM Nov 16, 2019Observed: 1.46 ft at 11:15PM Nov 16, 2019Observed: 1.46 ft at 11:30PM Nov 16, 2019Observed: 1.47 ft at 11:45PM Nov 16, 2019Observed: 1.46 ft at 12:00AM Nov 17, 2019Observed: 1.45 ft at 12:15AM Nov 17, 2019Observed: 1.46 ft at 12:30AM Nov 17, 2019Observed: 1.44 ft at 12:45AM Nov 17, 2019Observed: 1.46 ft at 1:00AM Nov 17, 2019Observed: 1.46 ft at 1:15AM Nov 17, 2019Observed: 1.46 ft at 1:30AM Nov 17, 2019Observed: 1.46 ft at 1:45AM Nov 17, 2019Observed: 1.46 ft at 2:00AM Nov 17, 2019Observed: 1.46 ft at 2:15AM Nov 17, 2019Observed: 1.47 ft at 2:30AM Nov 17, 2019Observed: 1.46 ft at 2:45AM Nov 17, 2019Observed: 1.44 ft at 3:00AM Nov 17, 2019Observed: 1.46 ft at 3:15AM Nov 17, 2019Observed: 1.46 ft at 3:30AM Nov 17, 2019Observed: 1.46 ft at 3:45AM Nov 17, 2019Observed: 1.46 ft at 4:00AM Nov 17, 2019Observed: 1.45 ft at 4:15AM Nov 17, 2019Observed: 1.46 ft at 4:30AM Nov 17, 2019Observed: 1.46 ft at 4:45AM Nov 17, 2019Observed: 1.47 ft at 5:00AM Nov 17, 2019Observed: 1.46 ft at 5:15AM Nov 17, 2019Observed: 1.46 ft at 5:30AM Nov 17, 2019Observed: 1.44 ft at 5:45AM Nov 17, 2019Observed: 1.46 ft at 6:00AM Nov 17, 2019Observed: 1.46 ft at 6:15AM Nov 17, 2019Observed: 1.46 ft at 6:30AM Nov 17, 2019Observed: 1.46 ft at 6:45AM Nov 17, 2019Observed: 1.45 ft at 7:00AM Nov 17, 2019Observed: 1.44 ft at 7:15AM Nov 17, 2019Observed: 1.46 ft at 7:30AM Nov 17, 2019Observed: 1.46 ft at 7:45AM Nov 17, 2019Observed: 1.46 ft at 8:00AM Nov 17, 2019Observed: 1.45 ft at 8:15AM Nov 17, 2019Observed: 1.43 ft at 8:30AM Nov 17, 2019Observed: 1.46 ft at 8:45AM Nov 17, 2019Observed: 1.45 ft at 9:00AM Nov 17, 2019Observed: 1.46 ft at 9:15AM Nov 17, 2019Observed: 1.46 ft at 9:30AM Nov 17, 2019Observed: 1.47 ft at 9:45AM Nov 17, 2019Observed: 1.44 ft at 10:00AM Nov 17, 2019Observed: 1.46 ft at 10:15AM Nov 17, 2019Observed: 1.46 ft at 10:30AM Nov 17, 2019Observed: 1.45 ft at 10:45AM Nov 17, 2019Observed: 1.46 ft at 11:00AM Nov 17, 2019Observed: 1.44 ft at 11:15AM Nov 17, 2019Observed: 1.46 ft at 11:30AM Nov 17, 2019Observed: 1.44 ft at 11:45AM Nov 17, 2019Observed: 1.46 ft at 12:00PM Nov 17, 2019Observed: 1.45 ft at 12:15PM Nov 17, 2019Observed: 1.46 ft at 12:30PM Nov 17, 2019Observed: 1.47 ft at 12:45PM Nov 17, 2019Observed: 1.44 ft at 1:00PM Nov 17, 2019Observed: 1.45 ft at 1:15PM Nov 17, 2019Observed: 1.46 ft at 1:30PM Nov 17, 2019Observed: 1.44 ft at 1:45PM Nov 17, 2019Observed: 1.47 ft at 2:00PM Nov 17, 2019Observed: 1.47 ft at 2:15PM Nov 17, 2019Observed: 1.47 ft at 2:30PM Nov 17, 2019Observed: 1.46 ft at 2:45PM Nov 17, 2019Observed: 1.45 ft at 3:00PM Nov 17, 2019Observed: 1.47 ft at 3:15PM Nov 17, 2019Observed: 1.45 ft at 3:30PM Nov 17, 2019Observed: 1.46 ft at 3:45PM Nov 17, 2019Observed: 1.46 ft at 4:00PM Nov 17, 2019Observed: 1.46 ft at 4:15PM Nov 17, 2019Observed: 1.46 ft at 4:30PM Nov 17, 2019Observed: 1.45 ft at 4:45PM Nov 17, 2019Observed: 1.46 ft at 5:00PM Nov 17, 2019Observed: 1.46 ft at 5:15PM Nov 17, 2019Observed: 1.47 ft at 5:30PM Nov 17, 2019Observed: 1.46 ft at 5:45PM Nov 17, 2019Observed: 1.46 ft at 6:00PM Nov 17, 2019Observed: 1.47 ft at 6:15PM Nov 17, 2019Observed: 1.46 ft at 6:30PM Nov 17, 2019Observed: 1.46 ft at 6:45PM Nov 17, 2019Observed: 1.47 ft at 7:00PM Nov 17, 2019Observed: 1.46 ft at 7:15PM Nov 17, 2019Observed: 1.46 ft at 7:30PM Nov 17, 2019Observed: 1.46 ft at 7:45PM Nov 17, 2019Observed: 1.44 ft at 8:00PM Nov 17, 2019Observed: 1.46 ft at 8:15PM Nov 17, 2019Observed: 1.46 ft at 8:30PM Nov 17, 2019Observed: 1.46 ft at 8:45PM Nov 17, 2019Observed: 1.47 ft at 9:00PM Nov 17, 2019Observed: 1.46 ft at 9:15PM Nov 17, 2019USGS--Water Resources of the United StatesGMRM2(plotting HGIRG) Graph Created (10:24PM Nov 17, 2019)ObservedLatest observed value: 1.46 ft at 9:15 PM EST 17-Nov-2019. 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: 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) 6.00 ft on 11/25/2018
(2) 6.19 ft on 07/22/2018
(3) 7.90 ft on 05/20/2018
(4) 6.77 ft on 07/06/2017
(5) 6.97 ft on 02/25/2016
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:14
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Gauge LocationGauge Map Marker
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Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
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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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