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ALERT: November 15 update on the status of the nationwide data transmission error preventing stream gauge data collected at affected locations from being displayed on the Advanced Hydrologic Prediction Services (AHPS) webpages. As of 11/08/2018, The USGS has restored all impacted operational stream gauges to transmitting status. The status map of gauge outages from other agencies is here. The outage map will be updated each Thursday. We apologize for the service interruption and hope to have the data restored as soon as possible.



Hydrograph River at a Glance Download
Potomac River at Shepherdstown Stage (ft)Flow (kcfs)Observed: 7.99 ft at 2:45PM Nov 12, 2018Observed: 8.04 ft at 3:00PM Nov 12, 2018Observed: 7.97 ft at 3:15PM Nov 12, 2018Observed: 7.93 ft at 3:30PM Nov 12, 2018Observed: 7.92 ft at 3:45PM Nov 12, 2018Observed: 7.9 ft at 4:00PM Nov 12, 2018Observed: 7.87 ft at 4:15PM Nov 12, 2018Observed: 7.89 ft at 4:30PM Nov 12, 2018Observed: 7.83 ft at 4:45PM Nov 12, 2018Observed: 7.83 ft at 5:00PM Nov 12, 2018Observed: 7.81 ft at 5:15PM Nov 12, 2018Observed: 7.8 ft at 5:30PM Nov 12, 2018Observed: 7.77 ft at 5:45PM Nov 12, 2018Observed: 7.76 ft at 6:00PM Nov 12, 2018Observed: 7.75 ft at 6:15PM Nov 12, 2018Observed: 7.72 ft at 6:30PM Nov 12, 2018Observed: 7.7 ft at 6:45PM Nov 12, 2018Observed: 7.68 ft at 7:00PM Nov 12, 2018Observed: 7.66 ft at 7:15PM Nov 12, 2018Observed: 7.65 ft at 7:30PM Nov 12, 2018Observed: 7.7 ft at 7:45PM Nov 12, 2018Observed: 7.64 ft at 8:00PM Nov 12, 2018Observed: 7.61 ft at 8:15PM Nov 12, 2018Observed: 7.6 ft at 8:30PM Nov 12, 2018Observed: 7.6 ft at 8:45PM Nov 12, 2018Observed: 7.62 ft at 9:00PM Nov 12, 2018Observed: 7.59 ft at 9:15PM Nov 12, 2018Observed: 7.57 ft at 9:30PM Nov 12, 2018Observed: 7.56 ft at 9:45PM Nov 12, 2018Observed: 7.54 ft at 10:00PM Nov 12, 2018Observed: 7.55 ft at 10:15PM Nov 12, 2018Observed: 7.51 ft at 10:30PM Nov 12, 2018Observed: 7.51 ft at 10:45PM Nov 12, 2018Observed: 7.51 ft at 11:00PM Nov 12, 2018Observed: 7.49 ft at 11:15PM Nov 12, 2018Observed: 7.47 ft at 11:30PM Nov 12, 2018Observed: 7.46 ft at 11:45PM Nov 12, 2018Observed: 7.49 ft at 12:00AM Nov 13, 2018Observed: 7.45 ft at 12:15AM Nov 13, 2018Observed: 7.45 ft at 12:30AM Nov 13, 2018Observed: 7.44 ft at 12:45AM Nov 13, 2018Observed: 7.42 ft at 1:00AM Nov 13, 2018Observed: 7.43 ft at 1:15AM Nov 13, 2018Observed: 7.42 ft at 1:30AM Nov 13, 2018Observed: 7.39 ft at 1:45AM Nov 13, 2018Observed: 7.48 ft at 2:00AM Nov 13, 2018Observed: 7.4 ft at 2:15AM Nov 13, 2018Observed: 7.41 ft at 2:30AM Nov 13, 2018Observed: 7.38 ft at 2:45AM Nov 13, 2018Observed: 7.38 ft at 3:00AM Nov 13, 2018Observed: 7.38 ft at 3:15AM Nov 13, 2018Observed: 7.35 ft at 3:30AM Nov 13, 2018Observed: 7.35 ft at 3:45AM Nov 13, 2018Observed: 7.34 ft at 4:00AM Nov 13, 2018Observed: 7.34 ft at 4:15AM Nov 13, 2018Observed: 7.35 ft at 4:30AM Nov 13, 2018Observed: 7.34 ft at 4:45AM Nov 13, 2018Observed: 7.32 ft at 5:00AM Nov 13, 2018Observed: 7.33 ft at 5:15AM Nov 13, 2018Observed: 7.33 ft at 5:30AM Nov 13, 2018Observed: 7.31 ft at 5:45AM Nov 13, 2018Observed: 7.31 ft at 6:00AM Nov 13, 2018Observed: 7.3 ft at 6:15AM Nov 13, 2018Observed: 7.3 ft at 6:30AM Nov 13, 2018Observed: 7.29 ft at 6:45AM Nov 13, 2018Observed: 7.28 ft at 7:00AM Nov 13, 2018Observed: 7.29 ft at 7:15AM Nov 13, 2018Observed: 7.28 ft at 7:30AM Nov 13, 2018Observed: 7.28 ft at 7:45AM Nov 13, 2018Observed: 7.3 ft at 8:00AM Nov 13, 2018Observed: 7.33 ft at 8:15AM Nov 13, 2018Observed: 7.31 ft at 8:30AM Nov 13, 2018Observed: 7.33 ft at 8:45AM Nov 13, 2018Observed: 7.32 ft at 9:00AM Nov 13, 2018Observed: 7.35 ft at 9:15AM Nov 13, 2018Observed: 7.35 ft at 9:30AM Nov 13, 2018Observed: 7.37 ft at 9:45AM Nov 13, 2018Observed: 7.36 ft at 10:00AM Nov 13, 2018Observed: 7.34 ft at 10:15AM Nov 13, 2018Observed: 7.34 ft at 10:30AM Nov 13, 2018Observed: 7.33 ft at 10:45AM Nov 13, 2018Observed: 7.34 ft at 11:00AM Nov 13, 2018Observed: 7.32 ft at 11:15AM Nov 13, 2018Observed: 7.38 ft at 11:30AM Nov 13, 2018Observed: 7.35 ft at 11:45AM Nov 13, 2018Observed: 7.33 ft at 12:00PM Nov 13, 2018Observed: 7.34 ft at 12:15PM Nov 13, 2018Observed: 7.35 ft at 12:30PM Nov 13, 2018Observed: 7.36 ft at 12:45PM Nov 13, 2018Observed: 7.35 ft at 1:00PM Nov 13, 2018Observed: 7.35 ft at 1:15PM Nov 13, 2018Observed: 7.37 ft at 1:30PM Nov 13, 2018Observed: 7.37 ft at 1:45PM Nov 13, 2018Observed: 7.36 ft at 2:00PM Nov 13, 2018Observed: 7.38 ft at 2:15PM Nov 13, 2018Observed: 7.36 ft at 2:30PM Nov 13, 2018Observed: 7.4 ft at 2:45PM Nov 13, 2018Observed: 7.39 ft at 3:00PM Nov 13, 2018Observed: 7.39 ft at 3:15PM Nov 13, 2018Observed: 7.43 ft at 3:30PM Nov 13, 2018Observed: 7.49 ft at 3:45PM Nov 13, 2018Observed: 7.48 ft at 4:00PM Nov 13, 2018Observed: 7.44 ft at 4:15PM Nov 13, 2018Observed: 7.46 ft at 4:30PM Nov 13, 2018Observed: 7.46 ft at 4:45PM Nov 13, 2018Observed: 7.5 ft at 5:00PM Nov 13, 2018Observed: 7.49 ft at 5:15PM Nov 13, 2018Observed: 7.49 ft at 5:30PM Nov 13, 2018Observed: 7.5 ft at 5:45PM Nov 13, 2018Observed: 7.52 ft at 6:00PM Nov 13, 2018Observed: 7.52 ft at 6:15PM Nov 13, 2018Observed: 7.51 ft at 6:30PM Nov 13, 2018Observed: 7.53 ft at 6:45PM Nov 13, 2018Observed: 7.54 ft at 7:00PM Nov 13, 2018Observed: 7.54 ft at 7:15PM Nov 13, 2018Observed: 7.55 ft at 7:30PM Nov 13, 2018Observed: 7.57 ft at 7:45PM Nov 13, 2018Observed: 7.57 ft at 8:00PM Nov 13, 2018Observed: 7.6 ft at 8:15PM Nov 13, 2018Observed: 7.63 ft at 8:30PM Nov 13, 2018Observed: 7.62 ft at 8:45PM Nov 13, 2018Observed: 7.66 ft at 9:00PM Nov 13, 2018Observed: 7.68 ft at 9:15PM Nov 13, 2018Observed: 7.71 ft at 9:30PM Nov 13, 2018Observed: 7.71 ft at 9:45PM Nov 13, 2018Observed: 7.74 ft at 10:00PM Nov 13, 2018Observed: 7.73 ft at 10:15PM Nov 13, 2018Observed: 7.76 ft at 10:30PM Nov 13, 2018Observed: 7.78 ft at 10:45PM Nov 13, 2018Observed: 7.81 ft at 11:00PM Nov 13, 2018Observed: 7.83 ft at 11:15PM Nov 13, 2018Observed: 7.86 ft at 11:30PM Nov 13, 2018Observed: 7.86 ft at 11:45PM Nov 13, 2018Observed: 7.9 ft at 12:00AM Nov 14, 2018Observed: 7.91 ft at 12:15AM Nov 14, 2018Observed: 7.95 ft at 12:30AM Nov 14, 2018Observed: 7.92 ft at 12:45AM Nov 14, 2018Observed: 7.96 ft at 1:00AM Nov 14, 2018Observed: 8 ft at 1:15AM Nov 14, 2018Observed: 8.02 ft at 1:30AM Nov 14, 2018Observed: 8.04 ft at 1:45AM Nov 14, 2018Observed: 8.07 ft at 2:00AM Nov 14, 2018Observed: 8.1 ft at 2:15AM Nov 14, 2018Observed: 8.11 ft at 2:30AM Nov 14, 2018Observed: 8.13 ft at 2:45AM Nov 14, 2018Observed: 8.14 ft at 3:00AM Nov 14, 2018Observed: 8.17 ft at 3:15AM Nov 14, 2018Observed: 8.18 ft at 3:30AM Nov 14, 2018Observed: 8.18 ft at 3:45AM Nov 14, 2018Observed: 8.2 ft at 4:00AM Nov 14, 2018Observed: 8.24 ft at 4:15AM Nov 14, 2018Observed: 8.26 ft at 4:30AM Nov 14, 2018Observed: 8.3 ft at 4:45AM Nov 14, 2018Observed: 8.29 ft at 5:00AM Nov 14, 2018Observed: 8.33 ft at 5:15AM Nov 14, 2018Observed: 8.35 ft at 5:30AM Nov 14, 2018Observed: 8.38 ft at 5:45AM Nov 14, 2018Observed: 8.39 ft at 6:00AM Nov 14, 2018Observed: 8.38 ft at 6:15AM Nov 14, 2018Observed: 8.44 ft at 6:30AM Nov 14, 2018Observed: 8.43 ft at 6:45AM Nov 14, 2018Observed: 8.46 ft at 7:00AM Nov 14, 2018Observed: 8.49 ft at 7:15AM Nov 14, 2018Observed: 8.51 ft at 7:30AM Nov 14, 2018Observed: 8.54 ft at 7:45AM Nov 14, 2018Observed: 8.57 ft at 8:00AM Nov 14, 2018Observed: 8.63 ft at 8:15AM Nov 14, 2018Observed: 8.63 ft at 8:30AM Nov 14, 2018Observed: 8.65 ft at 8:45AM Nov 14, 2018Observed: 8.7 ft at 9:00AM Nov 14, 2018Observed: 8.67 ft at 9:15AM Nov 14, 2018Observed: 8.71 ft at 9:30AM Nov 14, 2018Observed: 8.7 ft at 9:45AM Nov 14, 2018Observed: 8.72 ft at 10:00AM Nov 14, 2018Observed: 8.74 ft at 10:15AM Nov 14, 2018Observed: 8.75 ft at 10:30AM Nov 14, 2018Observed: 8.77 ft at 10:45AM Nov 14, 2018Observed: 8.76 ft at 11:00AM Nov 14, 2018Observed: 8.78 ft at 11:15AM Nov 14, 2018Observed: 8.8 ft at 11:30AM Nov 14, 2018Observed: 8.81 ft at 11:45AM Nov 14, 2018Observed: 8.8 ft at 12:00PM Nov 14, 2018Observed: 8.85 ft at 12:15PM Nov 14, 2018Observed: 8.86 ft at 12:30PM Nov 14, 2018Observed: 8.86 ft at 12:45PM Nov 14, 2018Observed: 8.85 ft at 1:00PM Nov 14, 2018Observed: 8.85 ft at 1:15PM Nov 14, 2018Observed: 8.88 ft at 1:30PM Nov 14, 2018Observed: 8.87 ft at 1:45PM Nov 14, 2018Observed: 8.88 ft at 2:00PM Nov 14, 2018Observed: 8.88 ft at 2:15PM Nov 14, 2018Highest Observation: 8.89 ft at 2:30PM Nov 14, 2018Observed: 8.88 ft at 2:45PM Nov 14, 2018Observed: 8.87 ft at 3:00PM Nov 14, 2018Observed: 8.88 ft at 3:15PM Nov 14, 2018Observed: 8.87 ft at 3:30PM Nov 14, 2018Highest Observation: 8.89 ft at 3:45PM Nov 14, 2018Observed: 8.87 ft at 4:00PM Nov 14, 2018Observed: 8.86 ft at 4:15PM Nov 14, 2018Observed: 8.87 ft at 4:30PM Nov 14, 2018Observed: 8.86 ft at 4:45PM Nov 14, 2018Observed: 8.87 ft at 5:00PM Nov 14, 2018Observed: 8.84 ft at 5:15PM Nov 14, 2018Observed: 8.84 ft at 5:30PM Nov 14, 2018Observed: 8.81 ft at 5:45PM Nov 14, 2018Observed: 8.82 ft at 6:00PM Nov 14, 2018Observed: 8.8 ft at 6:15PM Nov 14, 2018Observed: 8.78 ft at 6:30PM Nov 14, 2018Observed: 8.75 ft at 6:45PM Nov 14, 2018Observed: 8.75 ft at 7:00PM Nov 14, 2018Observed: 8.73 ft at 7:15PM Nov 14, 2018Observed: 8.7 ft at 7:30PM Nov 14, 2018Observed: 8.71 ft at 7:45PM Nov 14, 2018Observed: 8.71 ft at 8:00PM Nov 14, 2018Observed: 8.7 ft at 8:15PM Nov 14, 2018Observed: 8.69 ft at 8:30PM Nov 14, 2018Observed: 8.69 ft at 8:45PM Nov 14, 2018Observed: 8.68 ft at 9:00PM Nov 14, 2018Observed: 8.66 ft at 9:15PM Nov 14, 2018Observed: 8.64 ft at 9:30PM Nov 14, 2018Observed: 8.64 ft at 9:45PM Nov 14, 2018Observed: 8.62 ft at 10:00PM Nov 14, 2018Observed: 8.62 ft at 10:15PM Nov 14, 2018Observed: 8.62 ft at 10:30PM Nov 14, 2018Observed: 8.59 ft at 10:45PM Nov 14, 2018Observed: 8.62 ft at 11:00PM Nov 14, 2018Observed: 8.59 ft at 11:15PM Nov 14, 2018Observed: 8.6 ft at 11:30PM Nov 14, 2018Observed: 8.56 ft at 11:45PM Nov 14, 2018Observed: 8.58 ft at 12:00AM Nov 15, 2018Observed: 8.56 ft at 12:15AM Nov 15, 2018Observed: 8.56 ft at 12:30AM Nov 15, 2018Observed: 8.53 ft at 12:45AM Nov 15, 2018Observed: 8.53 ft at 1:00AM Nov 15, 2018Observed: 8.53 ft at 1:15AM Nov 15, 2018Observed: 8.53 ft at 1:30AM Nov 15, 2018Observed: 8.5 ft at 1:45AM Nov 15, 2018Observed: 8.51 ft at 2:00AM Nov 15, 2018Observed: 8.5 ft at 2:15AM Nov 15, 2018Observed: 8.5 ft at 2:30AM Nov 15, 2018Observed: 8.49 ft at 2:45AM Nov 15, 2018Observed: 8.5 ft at 3:00AM Nov 15, 2018Observed: 8.5 ft at 3:15AM Nov 15, 2018Observed: 8.5 ft at 3:30AM Nov 15, 2018Observed: 8.47 ft at 3:45AM Nov 15, 2018Observed: 8.48 ft at 4:00AM Nov 15, 2018Observed: 8.49 ft at 4:15AM Nov 15, 2018Observed: 8.47 ft at 4:30AM Nov 15, 2018Observed: 8.44 ft at 4:45AM Nov 15, 2018Observed: 8.46 ft at 5:00AM Nov 15, 2018Observed: 8.44 ft at 5:15AM Nov 15, 2018Observed: 8.43 ft at 5:30AM Nov 15, 2018Observed: 8.41 ft at 5:45AM Nov 15, 2018Observed: 8.46 ft at 6:00AM Nov 15, 2018Observed: 8.41 ft at 6:15AM Nov 15, 2018Observed: 8.4 ft at 6:30AM Nov 15, 2018Observed: 8.41 ft at 6:45AM Nov 15, 2018Observed: 8.39 ft at 7:00AM Nov 15, 2018Observed: 8.4 ft at 7:15AM Nov 15, 2018Observed: 8.4 ft at 7:30AM Nov 15, 2018Observed: 8.39 ft at 7:45AM Nov 15, 2018Observed: 8.39 ft at 8:00AM Nov 15, 2018Observed: 8.38 ft at 8:15AM Nov 15, 2018Observed: 8.38 ft at 8:30AM Nov 15, 2018Observed: 8.4 ft at 8:45AM Nov 15, 2018Observed: 8.41 ft at 9:00AM Nov 15, 2018Observed: 8.38 ft at 9:15AM Nov 15, 2018Observed: 8.38 ft at 9:30AM Nov 15, 2018Observed: 8.38 ft at 9:45AM Nov 15, 2018Observed: 8.36 ft at 10:00AM Nov 15, 2018Observed: 8.36 ft at 10:15AM Nov 15, 2018Observed: 8.36 ft at 10:30AM Nov 15, 2018Observed: 8.36 ft at 10:45AM Nov 15, 2018Observed: 8.34 ft at 11:00AM Nov 15, 2018Observed: 8.33 ft at 11:15AM Nov 15, 2018Observed: 8.34 ft at 11:30AM Nov 15, 2018Observed: 8.31 ft at 11:45AM Nov 15, 2018Observed: 8.32 ft at 12:00PM Nov 15, 2018Observed: 8.3 ft at 12:15PM Nov 15, 2018Observed: 8.3 ft at 12:30PM Nov 15, 2018Observed: 8.32 ft at 12:45PM Nov 15, 2018Observed: 8.27 ft at 1:00PM Nov 15, 2018Observed: 8.29 ft at 1:15PM Nov 15, 2018Observed: 8.29 ft at 1:30PM Nov 15, 2018Observed: 8.27 ft at 1:45PM Nov 15, 2018Observed: 8.26 ft at 2:00PM Nov 15, 2018Observed: 8.26 ft at 2:15PM Nov 15, 2018Observed: 8.26 ft at 2:30PM Nov 15, 2018Observed: 8.26 ft at 2:45PM Nov 15, 2018Observed: 8.23 ft at 3:00PM Nov 15, 2018Observed: 8.23 ft at 3:15PM Nov 15, 2018Observed: 8.24 ft at 3:30PM Nov 15, 2018Observed: 8.21 ft at 3:45PM Nov 15, 2018Observed: 8.2 ft at 4:00PM Nov 15, 2018Observed: 8.2 ft at 4:15PM Nov 15, 2018Observed: 8.19 ft at 4:30PM Nov 15, 2018Observed: 8.19 ft at 4:45PM Nov 15, 2018Observed: 8.15 ft at 5:00PM Nov 15, 2018Observed: 8.18 ft at 5:15PM Nov 15, 2018Observed: 8.16 ft at 5:30PM Nov 15, 2018Observed: 8.16 ft at 5:45PM Nov 15, 2018Observed: 8.1 ft at 6:00PM Nov 15, 2018Observed: 8.12 ft at 6:15PM Nov 15, 2018Observed: 8.1 ft at 6:30PM Nov 15, 2018Observed: 8.08 ft at 6:45PM Nov 15, 2018Observed: 8.09 ft at 7:00PM Nov 15, 2018Observed: 8.05 ft at 7:15PM Nov 15, 2018Observed: 8.06 ft at 7:30PM Nov 15, 2018Observed: 8.04 ft at 7:45PM Nov 15, 2018Observed: 8.03 ft at 8:00PM Nov 15, 2018Observed: 8.04 ft at 8:15PM Nov 15, 2018Observed: 8.03 ft at 8:30PM Nov 15, 2018Observed: 8.01 ft at 8:45PM Nov 15, 2018Observed: 7.99 ft at 9:00PM Nov 15, 2018Observed: 8.01 ft at 9:15PM Nov 15, 2018Observed: 8 ft at 9:30PM Nov 15, 2018Observed: 8 ft at 9:45PM Nov 15, 2018Observed: 7.98 ft at 10:00PM Nov 15, 2018Observed: 7.98 ft at 10:15PM Nov 15, 2018Observed: 7.97 ft at 10:30PM Nov 15, 2018Observed: 7.97 ft at 10:45PM Nov 15, 2018Observed: 7.96 ft at 11:00PM Nov 15, 2018Observed: 7.97 ft at 11:15PM Nov 15, 2018Observed: 7.95 ft at 11:30PM Nov 15, 2018Observed: 7.95 ft at 11:45PM Nov 15, 2018Observed: 7.94 ft at 12:00AM Nov 16, 2018Observed: 7.93 ft at 12:15AM Nov 16, 2018Observed: 7.94 ft at 12:30AM Nov 16, 2018Observed: 7.95 ft at 12:45AM Nov 16, 2018Observed: 7.93 ft at 1:00AM Nov 16, 2018Observed: 7.94 ft at 1:15AM Nov 16, 2018Observed: 7.94 ft at 1:30AM Nov 16, 2018Observed: 7.92 ft at 1:45AM Nov 16, 2018Observed: 7.95 ft at 2:00AM Nov 16, 2018Observed: 7.93 ft at 2:15AM Nov 16, 2018Observed: 7.93 ft at 2:30AM Nov 16, 2018Observed: 7.96 ft at 2:45AM Nov 16, 2018Observed: 7.93 ft at 3:00AM Nov 16, 2018Observed: 7.92 ft at 3:15AM Nov 16, 2018Observed: 7.93 ft at 3:30AM Nov 16, 2018Observed: 7.93 ft at 3:45AM Nov 16, 2018Observed: 7.94 ft at 4:00AM Nov 16, 2018Observed: 7.93 ft at 4:15AM Nov 16, 2018Observed: 7.92 ft at 4:30AM Nov 16, 2018Observed: 7.93 ft at 4:45AM Nov 16, 2018Observed: 7.93 ft at 5:00AM Nov 16, 2018Observed: 7.93 ft at 5:15AM Nov 16, 2018Observed: 7.93 ft at 5:30AM Nov 16, 2018Observed: 7.92 ft at 5:45AM Nov 16, 2018Observed: 7.94 ft at 6:00AM Nov 16, 2018Observed: 7.93 ft at 6:15AM Nov 16, 2018Observed: 7.95 ft at 6:30AM Nov 16, 2018Observed: 7.93 ft at 6:45AM Nov 16, 2018Observed: 7.92 ft at 7:00AM Nov 16, 2018Observed: 7.94 ft at 7:15AM Nov 16, 2018Observed: 7.95 ft at 7:30AM Nov 16, 2018Observed: 7.95 ft at 7:45AM Nov 16, 2018Observed: 7.98 ft at 8:00AM Nov 16, 2018Observed: 7.99 ft at 8:15AM Nov 16, 2018Observed: 7.97 ft at 8:30AM Nov 16, 2018Observed: 7.98 ft at 8:45AM Nov 16, 2018Observed: 8 ft at 9:00AM Nov 16, 2018Observed: 7.97 ft at 9:15AM Nov 16, 2018Observed: 8 ft at 9:30AM Nov 16, 2018Observed: 7.97 ft at 9:45AM Nov 16, 2018Observed: 7.98 ft at 10:00AM Nov 16, 2018Observed: 8 ft at 10:15AM Nov 16, 2018Observed: 7.97 ft at 10:30AM Nov 16, 2018Observed: 7.97 ft at 10:45AM Nov 16, 2018Observed: 7.97 ft at 11:00AM Nov 16, 2018Observed: 7.97 ft at 11:15AM Nov 16, 2018Observed: 7.99 ft at 11:30AM Nov 16, 2018Observed: 8 ft at 11:45AM Nov 16, 2018Observed: 8 ft at 12:00PM Nov 16, 2018Observed: 7.97 ft at 12:15PM Nov 16, 2018Observed: 7.99 ft at 12:30PM Nov 16, 2018Observed: 7.99 ft at 12:45PM Nov 16, 2018Observed: 7.98 ft at 1:00PM Nov 16, 2018Observed: 8 ft at 1:15PM Nov 16, 2018Observed: 7.98 ft at 1:30PM Nov 16, 2018Observed: 8 ft at 1:45PM Nov 16, 2018Observed: 8 ft at 2:00PM Nov 16, 2018Observed: 8.01 ft at 2:15PM Nov 16, 2018Observed: 7.98 ft at 2:30PM Nov 16, 2018Observed: 8.01 ft at 2:45PM Nov 16, 2018Observed: 7.99 ft at 3:00PM Nov 16, 2018Observed: 8.01 ft at 3:15PM Nov 16, 2018Observed: 8 ft at 3:30PM Nov 16, 2018Observed: 8 ft at 3:45PM Nov 16, 2018Observed: 8 ft at 4:00PM Nov 16, 2018Observed: 7.99 ft at 4:15PM Nov 16, 2018Observed: 8.02 ft at 4:30PM Nov 16, 2018Observed: 8.01 ft at 4:45PM Nov 16, 2018Observed: 8.01 ft at 5:00PM Nov 16, 2018Observed: 8.01 ft at 5:15PM Nov 16, 2018Observed: 8.02 ft at 5:30PM Nov 16, 2018Observed: 8.01 ft at 5:45PM Nov 16, 2018Observed: 8 ft at 6:00PM Nov 16, 2018Observed: 8 ft at 6:15PM Nov 16, 2018Observed: 8.01 ft at 6:30PM Nov 16, 2018Observed: 8.01 ft at 6:45PM Nov 16, 2018Observed: 8.03 ft at 7:00PM Nov 16, 2018Observed: 8.03 ft at 7:15PM Nov 16, 2018Observed: 8.03 ft at 7:30PM Nov 16, 2018Observed: 8.04 ft at 7:45PM Nov 16, 2018Observed: 8.05 ft at 8:00PM Nov 16, 2018Observed: 8.04 ft at 8:15PM Nov 16, 2018Observed: 8.05 ft at 8:30PM Nov 16, 2018Observed: 8.06 ft at 8:45PM Nov 16, 2018Observed: 8.06 ft at 9:00PM Nov 16, 2018Observed: 8.07 ft at 9:15PM Nov 16, 2018Observed: 8.08 ft at 9:30PM Nov 16, 2018Observed: 8.07 ft at 9:45PM Nov 16, 2018Observed: 8.1 ft at 10:00PM Nov 16, 2018Observed: 8.13 ft at 10:15PM Nov 16, 2018Observed: 8.11 ft at 10:30PM Nov 16, 2018Observed: 8.12 ft at 10:45PM Nov 16, 2018Observed: 8.11 ft at 11:00PM Nov 16, 2018Observed: 8.13 ft at 11:15PM Nov 16, 2018Observed: 8.13 ft at 11:30PM Nov 16, 2018Observed: 8.15 ft at 11:45PM Nov 16, 2018Observed: 8.15 ft at 12:00AM Nov 17, 2018Observed: 8.19 ft at 12:15AM Nov 17, 2018Observed: 8.18 ft at 12:30AM Nov 17, 2018Observed: 8.21 ft at 12:45AM Nov 17, 2018Observed: 8.18 ft at 1:00AM Nov 17, 2018Observed: 8.18 ft at 1:15AM Nov 17, 2018Observed: 8.2 ft at 1:30AM Nov 17, 2018Observed: 8.22 ft at 1:45AM Nov 17, 2018Observed: 8.23 ft at 2:00AM Nov 17, 2018Observed: 8.22 ft at 2:15AM Nov 17, 2018Observed: 8.23 ft at 2:30AM Nov 17, 2018Observed: 8.25 ft at 2:45AM Nov 17, 2018Observed: 8.23 ft at 3:00AM Nov 17, 2018Observed: 8.24 ft at 3:15AM Nov 17, 2018Observed: 8.26 ft at 3:30AM Nov 17, 2018Observed: 8.28 ft at 3:45AM Nov 17, 2018Observed: 8.26 ft at 4:00AM Nov 17, 2018Observed: 8.28 ft at 4:15AM Nov 17, 2018Observed: 8.29 ft at 4:30AM Nov 17, 2018Observed: 8.26 ft at 4:45AM Nov 17, 2018Observed: 8.28 ft at 5:00AM Nov 17, 2018Observed: 8.29 ft at 5:15AM Nov 17, 2018Observed: 8.31 ft at 5:30AM Nov 17, 2018Observed: 8.3 ft at 5:45AM Nov 17, 2018Observed: 8.3 ft at 6:00AM Nov 17, 2018Observed: 8.3 ft at 6:15AM Nov 17, 2018Observed: 8.31 ft at 6:30AM Nov 17, 2018Observed: 8.32 ft at 6:45AM Nov 17, 2018Observed: 8.33 ft at 7:00AM Nov 17, 2018Observed: 8.3 ft at 7:15AM Nov 17, 2018Observed: 8.32 ft at 7:30AM Nov 17, 2018Observed: 8.34 ft at 7:45AM Nov 17, 2018Observed: 8.32 ft at 8:00AM Nov 17, 2018Observed: 8.33 ft at 8:15AM Nov 17, 2018Observed: 8.34 ft at 8:30AM Nov 17, 2018Observed: 8.34 ft at 8:45AM Nov 17, 2018Observed: 8.34 ft at 9:00AM Nov 17, 2018Observed: 8.34 ft at 9:15AM Nov 17, 2018Observed: 8.36 ft at 9:30AM Nov 17, 2018Observed: 8.38 ft at 9:45AM Nov 17, 2018Observed: 8.4 ft at 10:00AM Nov 17, 2018Observed: 8.4 ft at 10:15AM Nov 17, 2018Observed: 8.4 ft at 10:30AM Nov 17, 2018Observed: 8.42 ft at 10:45AM Nov 17, 2018Observed: 8.42 ft at 11:00AM Nov 17, 2018Observed: 8.4 ft at 11:15AM Nov 17, 2018Observed: 8.43 ft at 11:30AM Nov 17, 2018Observed: 8.42 ft at 11:45AM Nov 17, 2018Observed: 8.45 ft at 12:00PM Nov 17, 2018Observed: 8.44 ft at 12:15PM Nov 17, 2018Observed: 8.45 ft at 12:30PM Nov 17, 2018Observed: 8.46 ft at 12:45PM Nov 17, 2018Observed: 8.45 ft at 1:00PM Nov 17, 2018Observed: 8.44 ft at 1:15PM Nov 17, 2018Observed: 8.46 ft at 1:30PM Nov 17, 2018Forecast: 8.4 ft 7:00PM Nov 17, 2018Forecast: 8.5 ft 1:00AM Nov 18, 2018Forecast: 8.5 ft 7:00AM Nov 18, 2018Forecast: 8.5 ft 1:00PM Nov 18, 2018Forecast: 8.5 ft 7:00PM Nov 18, 2018Forecast: 8.5 ft 1:00AM Nov 19, 2018Forecast: 8.5 ft 7:00AM Nov 19, 2018Forecast: 8.4 ft 1:00PM Nov 19, 2018Forecast: 8.4 ft 7:00PM Nov 19, 2018Forecast: 8.4 ft 1:00AM Nov 20, 2018Highest Forecast: 8.7 ft 7:00AM Nov 20, 2018USGS--Water Resources of the United StatesSHEW2(plotting HGIRG) Graph Created (2:39PM Nov 17, 2018)ObservedForecast (issued 10:27AM Nov 17)Latest observed value: 8.46 ft at 1:30 PM EST 17-Nov-2018. Flood Stage is 15 ft
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NOTE: Forecasts for the Potomac River at Shepherdstown are issued routinely year-round.
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Upstream Gauge - at Williamsport Upstream Gauge Downstream Gauge Downstream Gauge - at Harpers Ferry
Flood Categories (in feet)
Major Flood Stage: 25
Moderate Flood Stage: 22
Flood Stage: 15
Action Stage: 8
Low Stage (in feet): -9999

Historic Crests
(1) 42.07 ft on 03/19/1936
(2) 39.20 ft on 06/01/1889
(3) 33.20 ft on 04/27/1937
(4) 32.68 ft on 10/16/1942
(5) 32.50 ft on 01/21/1996
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 21.36 ft on 09/29/2018
(2) 15.59 ft on 09/26/2018
(3) 21.79 ft on 09/11/2018
(4) 23.15 ft on 06/04/2018
(5) 17.78 ft on 05/20/2018
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:16
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Gauge LocationGauge Map Marker
Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
25 Significant flooding is occurring throughout this stretch of the Potomac, with numerous buildings and roads inundated, and a few homes. Major impacts are occurring on C&O Canal property.
24 Water begins to cover the parking lot adjacent to the Shepherdstown boat ramp, and approaches the lowest point of an adjacent building. Water also reaches the upper parking area of the boat ramp adjacent to Dam Number Four on the West Virginia side of the river.
22 Water approaches homes on the West Virginia side of the river near Shepherdstown, and impacts are also observed on the Maryland side, not just to the C&O Canal towpath, but also to roads and structures.
19 Water covers the pedestrian bridge adjacent to the Shepherdstown boat ramp. Significant portions of the C&O Canal towpath are flooded.
16 Water goes over the banks of the Potomac near the mouth of the Opequon River.
15 River Road is completely flooded in low spots between Shepherdstown and Harpers Ferry. Significant portions of the C&O Canal towpath are flooded between McMahons Mill and Dam Number Four.
13 River Road near Shepherdstown begins to flood. Water completely covers the boat ramp at Shepherdstown.
12 Water reaches the lowest part of the parking areas at Big Slackwater and Taylors Landing on the Maryland side of the river.
11 Water begins to cover the C&O Canal towpath downstream of McMahons Mill.
8 Water covers the lower parking area of the boat ramp adjacent to Dam Number Four on the West Virginia side of the river, and is a foot or less deep on the lowest portions of the C&O Canal towpath upstream of McMahons Mill near Big Slackwater.
About This Location Collapse

Latitude: 39.434722° N, Longitude: 77.801389° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 15 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:

Additional Information Collapse
Potential River Levels - Used to
Potential River Levels
Used to Estimate the Chance of Flooding and the Range of Possible River Levels
3 Day (SREF) 7 Day (NAEFS) 7 Day (GEFS)
SREF Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 48 hours.

See the Product Description Document link for more details on the interpretation of the 3,7 day graphics. 

Click individual graphics to enlarge.

Resources Collapse
Hydrologic Resources Additional Resources
Collaborative Agencies Collapse
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 5:21 PM
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