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ALERT: December 13th 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. This will be the last outage map posted as over 95% of the gauge outages have been restored. Local NWS offices will continue to monitor the remaining gauge outages.



Hydrograph River at a Glance Download
Potomac River at Edwards Ferry Stage (ft)Observed: 6.22 ft at 6:45AM Dec 13, 2018Observed: 6.21 ft at 7:00AM Dec 13, 2018Observed: 6.22 ft at 7:15AM Dec 13, 2018Observed: 6.21 ft at 7:30AM Dec 13, 2018Observed: 6.21 ft at 7:45AM Dec 13, 2018Observed: 6.21 ft at 8:00AM Dec 13, 2018Observed: 6.21 ft at 8:15AM Dec 13, 2018Observed: 6.21 ft at 8:30AM Dec 13, 2018Observed: 6.21 ft at 8:45AM Dec 13, 2018Observed: 6.21 ft at 9:00AM Dec 13, 2018Observed: 6.21 ft at 9:15AM Dec 13, 2018Observed: 6.2 ft at 9:30AM Dec 13, 2018Observed: 6.2 ft at 9:45AM Dec 13, 2018Observed: 6.21 ft at 10:00AM Dec 13, 2018Observed: 6.2 ft at 10:15AM Dec 13, 2018Observed: 6.2 ft at 10:30AM Dec 13, 2018Observed: 6.2 ft at 10:45AM Dec 13, 2018Observed: 6.2 ft at 11:00AM Dec 13, 2018Observed: 6.2 ft at 11:15AM Dec 13, 2018Observed: 6.2 ft at 11:30AM Dec 13, 2018Observed: 6.19 ft at 11:45AM Dec 13, 2018Observed: 6.19 ft at 12:00PM Dec 13, 2018Observed: 6.19 ft at 12:15PM Dec 13, 2018Observed: 6.19 ft at 12:30PM Dec 13, 2018Observed: 6.18 ft at 12:45PM Dec 13, 2018Observed: 6.18 ft at 1:00PM Dec 13, 2018Observed: 6.18 ft at 1:15PM Dec 13, 2018Observed: 6.18 ft at 1:30PM Dec 13, 2018Observed: 6.17 ft at 1:45PM Dec 13, 2018Observed: 6.17 ft at 2:00PM Dec 13, 2018Observed: 6.17 ft at 2:15PM Dec 13, 2018Observed: 6.16 ft at 2:30PM Dec 13, 2018Observed: 6.16 ft at 2:45PM Dec 13, 2018Observed: 6.16 ft at 3:00PM Dec 13, 2018Observed: 6.15 ft at 3:15PM Dec 13, 2018Observed: 6.15 ft at 3:30PM Dec 13, 2018Observed: 6.15 ft at 3:45PM Dec 13, 2018Observed: 6.15 ft at 4:00PM Dec 13, 2018Observed: 6.14 ft at 4:15PM Dec 13, 2018Observed: 6.14 ft at 4:30PM Dec 13, 2018Observed: 6.14 ft at 4:45PM Dec 13, 2018Observed: 6.14 ft at 5:00PM Dec 13, 2018Observed: 6.14 ft at 5:15PM Dec 13, 2018Observed: 6.14 ft at 5:30PM Dec 13, 2018Observed: 6.14 ft at 5:45PM Dec 13, 2018Observed: 6.13 ft at 6:00PM Dec 13, 2018Observed: 6.13 ft at 6:15PM Dec 13, 2018Observed: 6.13 ft at 6:30PM Dec 13, 2018Observed: 6.13 ft at 6:45PM Dec 13, 2018Observed: 6.13 ft at 7:00PM Dec 13, 2018Observed: 6.13 ft at 7:15PM Dec 13, 2018Observed: 6.13 ft at 7:30PM Dec 13, 2018Observed: 6.12 ft at 7:45PM Dec 13, 2018Observed: 6.12 ft at 8:00PM Dec 13, 2018Observed: 6.12 ft at 8:15PM Dec 13, 2018Observed: 6.12 ft at 8:30PM Dec 13, 2018Observed: 6.12 ft at 8:45PM Dec 13, 2018Observed: 6.12 ft at 9:00PM Dec 13, 2018Observed: 6.12 ft at 9:15PM Dec 13, 2018Observed: 6.11 ft at 9:30PM Dec 13, 2018Observed: 6.11 ft at 9:45PM Dec 13, 2018Observed: 6.11 ft at 10:00PM Dec 13, 2018Observed: 6.11 ft at 10:15PM Dec 13, 2018Observed: 6.11 ft at 10:30PM Dec 13, 2018Observed: 6.11 ft at 10:45PM Dec 13, 2018Observed: 6.11 ft at 11:00PM Dec 13, 2018Observed: 6.11 ft at 11:15PM Dec 13, 2018Observed: 6.11 ft at 11:30PM Dec 13, 2018Observed: 6.11 ft at 11:45PM Dec 13, 2018Observed: 6.11 ft at 12:00AM Dec 14, 2018Observed: 6.1 ft at 12:15AM Dec 14, 2018Observed: 6.11 ft at 12:30AM Dec 14, 2018Observed: 6.11 ft at 12:45AM Dec 14, 2018Observed: 6.11 ft at 1:00AM Dec 14, 2018Observed: 6.11 ft at 1:15AM Dec 14, 2018Observed: 6.11 ft at 1:30AM Dec 14, 2018Observed: 6.11 ft at 1:45AM Dec 14, 2018Observed: 6.11 ft at 2:00AM Dec 14, 2018Observed: 6.11 ft at 2:15AM Dec 14, 2018Observed: 6.11 ft at 2:30AM Dec 14, 2018Observed: 6.11 ft at 2:45AM Dec 14, 2018Observed: 6.11 ft at 3:00AM Dec 14, 2018Observed: 6.11 ft at 3:15AM Dec 14, 2018Observed: 6.11 ft at 3:30AM Dec 14, 2018Observed: 6.11 ft at 3:45AM Dec 14, 2018Observed: 6.11 ft at 4:00AM Dec 14, 2018Observed: 6.11 ft at 4:15AM Dec 14, 2018Observed: 6.1 ft at 4:30AM Dec 14, 2018Observed: 6.11 ft at 4:45AM Dec 14, 2018Observed: 6.1 ft at 5:00AM Dec 14, 2018Observed: 6.1 ft at 5:15AM Dec 14, 2018Observed: 6.1 ft at 5:30AM Dec 14, 2018Observed: 6.1 ft at 5:45AM Dec 14, 2018Observed: 6.1 ft at 6:00AM Dec 14, 2018Observed: 6.1 ft at 6:15AM Dec 14, 2018Observed: 6.1 ft at 6:30AM Dec 14, 2018Observed: 6.1 ft at 6:45AM Dec 14, 2018Observed: 6.1 ft at 7:00AM Dec 14, 2018Observed: 6.1 ft at 7:15AM Dec 14, 2018Observed: 6.1 ft at 7:30AM Dec 14, 2018Observed: 6.1 ft at 7:45AM Dec 14, 2018Observed: 6.1 ft at 8:00AM Dec 14, 2018Observed: 6.1 ft at 8:15AM Dec 14, 2018Observed: 6.1 ft at 8:30AM Dec 14, 2018Observed: 6.09 ft at 8:45AM Dec 14, 2018Observed: 6.09 ft at 9:00AM Dec 14, 2018Observed: 6.09 ft at 9:15AM Dec 14, 2018Observed: 6.09 ft at 9:30AM Dec 14, 2018Observed: 6.09 ft at 9:45AM Dec 14, 2018Observed: 6.09 ft at 10:00AM Dec 14, 2018Observed: 6.09 ft at 10:15AM Dec 14, 2018Observed: 6.09 ft at 10:30AM Dec 14, 2018Observed: 6.09 ft at 10:45AM Dec 14, 2018Observed: 6.09 ft at 11:00AM Dec 14, 2018Observed: 6.09 ft at 11:15AM Dec 14, 2018Observed: 6.08 ft at 11:30AM Dec 14, 2018Observed: 6.08 ft at 11:45AM Dec 14, 2018Observed: 6.08 ft at 12:00PM Dec 14, 2018Observed: 6.08 ft at 12:15PM Dec 14, 2018Observed: 6.08 ft at 12:30PM Dec 14, 2018Observed: 6.07 ft at 12:45PM Dec 14, 2018Observed: 6.07 ft at 1:00PM Dec 14, 2018Observed: 6.07 ft at 1:15PM Dec 14, 2018Observed: 6.07 ft at 1:30PM Dec 14, 2018Observed: 6.06 ft at 1:45PM Dec 14, 2018Observed: 6.06 ft at 2:00PM Dec 14, 2018Observed: 6.06 ft at 2:15PM Dec 14, 2018Observed: 6.06 ft at 2:30PM Dec 14, 2018Observed: 6.06 ft at 2:45PM Dec 14, 2018Observed: 6.05 ft at 3:00PM Dec 14, 2018Observed: 6.05 ft at 3:15PM Dec 14, 2018Observed: 6.05 ft at 3:30PM Dec 14, 2018Observed: 6.05 ft at 3:45PM Dec 14, 2018Observed: 6.04 ft at 4:00PM Dec 14, 2018Observed: 6.05 ft at 4:15PM Dec 14, 2018Observed: 6.04 ft at 4:30PM Dec 14, 2018Observed: 6.04 ft at 4:45PM Dec 14, 2018Observed: 6.04 ft at 5:00PM Dec 14, 2018Observed: 6.04 ft at 5:15PM Dec 14, 2018Observed: 6.04 ft at 5:30PM Dec 14, 2018Observed: 6.04 ft at 5:45PM Dec 14, 2018Observed: 6.04 ft at 6:00PM Dec 14, 2018Observed: 6.04 ft at 6:15PM Dec 14, 2018Observed: 6.04 ft at 6:30PM Dec 14, 2018Observed: 6.04 ft at 6:45PM Dec 14, 2018Observed: 6.04 ft at 7:00PM Dec 14, 2018Observed: 6.04 ft at 7:15PM Dec 14, 2018Observed: 6.04 ft at 7:30PM Dec 14, 2018Observed: 6.04 ft at 7:45PM Dec 14, 2018Observed: 6.04 ft at 8:00PM Dec 14, 2018Observed: 6.04 ft at 8:15PM Dec 14, 2018Observed: 6.04 ft at 8:30PM Dec 14, 2018Observed: 6.04 ft at 8:45PM Dec 14, 2018Observed: 6.04 ft at 9:00PM Dec 14, 2018Observed: 6.04 ft at 9:15PM Dec 14, 2018Observed: 6.04 ft at 9:30PM Dec 14, 2018Observed: 6.04 ft at 9:45PM Dec 14, 2018Observed: 6.04 ft at 10:00PM Dec 14, 2018Observed: 6.05 ft at 10:15PM Dec 14, 2018Observed: 6.05 ft at 10:30PM Dec 14, 2018Observed: 6.05 ft at 10:45PM Dec 14, 2018Observed: 6.05 ft at 11:00PM Dec 14, 2018Observed: 6.05 ft at 11:15PM Dec 14, 2018Observed: 6.05 ft at 11:30PM Dec 14, 2018Observed: 6.05 ft at 11:45PM Dec 14, 2018Observed: 6.05 ft at 12:00AM Dec 15, 2018Observed: 6.05 ft at 12:15AM Dec 15, 2018Observed: 6.05 ft at 12:30AM Dec 15, 2018Observed: 6.05 ft at 12:45AM Dec 15, 2018Observed: 6.06 ft at 1:00AM Dec 15, 2018Observed: 6.06 ft at 1:15AM Dec 15, 2018Observed: 6.06 ft at 1:30AM Dec 15, 2018Observed: 6.06 ft at 1:45AM Dec 15, 2018Observed: 6.07 ft at 2:00AM Dec 15, 2018Observed: 6.06 ft at 2:15AM Dec 15, 2018Observed: 6.07 ft at 2:30AM Dec 15, 2018Observed: 6.07 ft at 2:45AM Dec 15, 2018Observed: 6.07 ft at 3:00AM Dec 15, 2018Observed: 6.07 ft at 3:15AM Dec 15, 2018Observed: 6.08 ft at 3:30AM Dec 15, 2018Observed: 6.08 ft at 3:45AM Dec 15, 2018Observed: 6.08 ft at 4:00AM Dec 15, 2018Observed: 6.08 ft at 4:15AM Dec 15, 2018Observed: 6.08 ft at 4:30AM Dec 15, 2018Observed: 6.08 ft at 4:45AM Dec 15, 2018Observed: 6.09 ft at 5:00AM Dec 15, 2018Observed: 6.09 ft at 5:15AM Dec 15, 2018Observed: 6.09 ft at 5:30AM Dec 15, 2018Observed: 6.1 ft at 5:45AM Dec 15, 2018Observed: 6.1 ft at 6:00AM Dec 15, 2018Observed: 6.1 ft at 6:15AM Dec 15, 2018Observed: 6.11 ft at 6:30AM Dec 15, 2018Observed: 6.11 ft at 6:45AM Dec 15, 2018Observed: 6.11 ft at 7:00AM Dec 15, 2018Observed: 6.12 ft at 7:15AM Dec 15, 2018Observed: 6.12 ft at 7:30AM Dec 15, 2018Observed: 6.13 ft at 7:45AM Dec 15, 2018Observed: 6.14 ft at 8:00AM Dec 15, 2018Observed: 6.14 ft at 8:15AM Dec 15, 2018Observed: 6.15 ft at 8:30AM Dec 15, 2018Observed: 6.16 ft at 8:45AM Dec 15, 2018Observed: 6.17 ft at 9:00AM Dec 15, 2018Observed: 6.18 ft at 9:15AM Dec 15, 2018Observed: 6.2 ft at 9:30AM Dec 15, 2018Observed: 6.21 ft at 9:45AM Dec 15, 2018Observed: 6.23 ft at 10:00AM Dec 15, 2018Observed: 6.25 ft at 10:15AM Dec 15, 2018Observed: 6.28 ft at 10:30AM Dec 15, 2018Observed: 6.3 ft at 10:45AM Dec 15, 2018Observed: 6.34 ft at 11:00AM Dec 15, 2018Observed: 6.37 ft at 11:15AM Dec 15, 2018Observed: 6.41 ft at 11:30AM Dec 15, 2018Observed: 6.45 ft at 11:45AM Dec 15, 2018Observed: 6.5 ft at 12:00PM Dec 15, 2018Observed: 6.55 ft at 12:15PM Dec 15, 2018Observed: 6.6 ft at 12:30PM Dec 15, 2018Observed: 6.66 ft at 12:45PM Dec 15, 2018Observed: 6.72 ft at 1:00PM Dec 15, 2018Observed: 6.79 ft at 1:15PM Dec 15, 2018Observed: 6.86 ft at 1:30PM Dec 15, 2018Observed: 6.92 ft at 1:45PM Dec 15, 2018Observed: 6.99 ft at 2:00PM Dec 15, 2018Observed: 7.06 ft at 2:15PM Dec 15, 2018Observed: 7.13 ft at 2:30PM Dec 15, 2018Observed: 7.2 ft at 2:45PM Dec 15, 2018Observed: 7.27 ft at 3:00PM Dec 15, 2018Observed: 7.34 ft at 3:15PM Dec 15, 2018Observed: 7.41 ft at 3:30PM Dec 15, 2018Observed: 7.48 ft at 3:45PM Dec 15, 2018Observed: 7.56 ft at 4:00PM Dec 15, 2018Observed: 7.63 ft at 4:15PM Dec 15, 2018Observed: 7.71 ft at 4:30PM Dec 15, 2018Observed: 7.79 ft at 4:45PM Dec 15, 2018Observed: 7.87 ft at 5:00PM Dec 15, 2018Observed: 7.95 ft at 5:15PM Dec 15, 2018Observed: 8.03 ft at 5:30PM Dec 15, 2018Observed: 8.11 ft at 5:45PM Dec 15, 2018Observed: 8.19 ft at 6:00PM Dec 15, 2018Observed: 8.27 ft at 6:15PM Dec 15, 2018Observed: 8.35 ft at 6:30PM Dec 15, 2018Observed: 8.43 ft at 6:45PM Dec 15, 2018Observed: 8.51 ft at 7:00PM Dec 15, 2018Observed: 8.59 ft at 7:15PM Dec 15, 2018Observed: 8.67 ft at 7:30PM Dec 15, 2018Observed: 8.75 ft at 7:45PM Dec 15, 2018Observed: 8.82 ft at 8:00PM Dec 15, 2018Observed: 8.9 ft at 8:15PM Dec 15, 2018Observed: 8.97 ft at 8:30PM Dec 15, 2018Observed: 9.04 ft at 8:45PM Dec 15, 2018Observed: 9.11 ft at 9:00PM Dec 15, 2018Observed: 9.19 ft at 9:15PM Dec 15, 2018Observed: 9.26 ft at 9:30PM Dec 15, 2018Observed: 9.34 ft at 9:45PM Dec 15, 2018Observed: 9.42 ft at 10:00PM Dec 15, 2018Observed: 9.5 ft at 10:15PM Dec 15, 2018Observed: 9.58 ft at 10:30PM Dec 15, 2018Observed: 9.67 ft at 10:45PM Dec 15, 2018Observed: 9.77 ft at 11:00PM Dec 15, 2018Observed: 9.86 ft at 11:15PM Dec 15, 2018Observed: 9.96 ft at 11:30PM Dec 15, 2018Observed: 10.06 ft at 11:45PM Dec 15, 2018Observed: 10.16 ft at 12:00AM Dec 16, 2018Observed: 10.25 ft at 12:15AM Dec 16, 2018Observed: 10.36 ft at 12:30AM Dec 16, 2018Observed: 10.46 ft at 12:45AM Dec 16, 2018Observed: 10.54 ft at 1:00AM Dec 16, 2018Observed: 10.63 ft at 1:15AM Dec 16, 2018Observed: 10.72 ft at 1:30AM Dec 16, 2018Observed: 10.8 ft at 1:45AM Dec 16, 2018Observed: 10.88 ft at 2:00AM Dec 16, 2018Observed: 10.96 ft at 2:15AM Dec 16, 2018Observed: 11.03 ft at 2:30AM Dec 16, 2018Observed: 11.1 ft at 2:45AM Dec 16, 2018Observed: 11.18 ft at 3:00AM Dec 16, 2018Observed: 11.25 ft at 3:15AM Dec 16, 2018Observed: 11.32 ft at 3:30AM Dec 16, 2018Observed: 11.39 ft at 3:45AM Dec 16, 2018Observed: 11.46 ft at 4:00AM Dec 16, 2018Observed: 11.54 ft at 4:15AM Dec 16, 2018Observed: 11.61 ft at 4:30AM Dec 16, 2018Observed: 11.68 ft at 4:45AM Dec 16, 2018Observed: 11.75 ft at 5:00AM Dec 16, 2018Observed: 11.81 ft at 5:15AM Dec 16, 2018Observed: 11.87 ft at 5:30AM Dec 16, 2018Observed: 11.94 ft at 5:45AM Dec 16, 2018Observed: 11.99 ft at 6:00AM Dec 16, 2018Observed: 12.04 ft at 6:15AM Dec 16, 2018Observed: 12.1 ft at 6:30AM Dec 16, 2018Observed: 12.15 ft at 6:45AM Dec 16, 2018Observed: 12.2 ft at 7:00AM Dec 16, 2018Observed: 12.25 ft at 7:15AM Dec 16, 2018Observed: 12.3 ft at 7:30AM Dec 16, 2018Observed: 12.36 ft at 7:45AM Dec 16, 2018Observed: 12.4 ft at 8:00AM Dec 16, 2018Observed: 12.46 ft at 8:15AM Dec 16, 2018Observed: 12.5 ft at 8:30AM Dec 16, 2018Observed: 12.55 ft at 8:45AM Dec 16, 2018Observed: 12.61 ft at 9:00AM Dec 16, 2018Observed: 12.66 ft at 9:15AM Dec 16, 2018Observed: 12.72 ft at 9:30AM Dec 16, 2018Observed: 12.77 ft at 9:45AM Dec 16, 2018Observed: 12.83 ft at 10:00AM Dec 16, 2018Observed: 12.89 ft at 10:15AM Dec 16, 2018Observed: 12.96 ft at 10:30AM Dec 16, 2018Observed: 13.02 ft at 10:45AM Dec 16, 2018Observed: 13.08 ft at 11:00AM Dec 16, 2018Observed: 13.16 ft at 11:15AM Dec 16, 2018Observed: 13.23 ft at 11:30AM Dec 16, 2018Observed: 13.31 ft at 11:45AM Dec 16, 2018Observed: 13.4 ft at 12:00PM Dec 16, 2018Observed: 13.49 ft at 12:15PM Dec 16, 2018Observed: 13.59 ft at 12:30PM Dec 16, 2018Observed: 13.69 ft at 12:45PM Dec 16, 2018Observed: 13.79 ft at 1:00PM Dec 16, 2018Observed: 13.91 ft at 1:15PM Dec 16, 2018Observed: 14.03 ft at 1:30PM Dec 16, 2018Observed: 14.17 ft at 1:45PM Dec 16, 2018Observed: 14.31 ft at 2:00PM Dec 16, 2018Observed: 14.45 ft at 2:15PM Dec 16, 2018Observed: 14.6 ft at 2:30PM Dec 16, 2018Observed: 14.75 ft at 2:45PM Dec 16, 2018Observed: 14.92 ft at 3:00PM Dec 16, 2018Observed: 15.08 ft at 3:15PM Dec 16, 2018Observed: 15.25 ft at 3:30PM Dec 16, 2018Observed: 15.43 ft at 3:45PM Dec 16, 2018Observed: 15.6 ft at 4:00PM Dec 16, 2018Observed: 15.75 ft at 4:15PM Dec 16, 2018Observed: 15.94 ft at 4:30PM Dec 16, 2018Observed: 16.11 ft at 4:45PM Dec 16, 2018Observed: 16.29 ft at 5:00PM Dec 16, 2018Observed: 16.45 ft at 5:15PM Dec 16, 2018Observed: 16.6 ft at 5:30PM Dec 16, 2018Observed: 16.78 ft at 5:45PM Dec 16, 2018Observed: 16.94 ft at 6:00PM Dec 16, 2018Observed: 17.1 ft at 6:15PM Dec 16, 2018Observed: 17.24 ft at 6:30PM Dec 16, 2018Observed: 17.4 ft at 6:45PM Dec 16, 2018Observed: 17.54 ft at 7:00PM Dec 16, 2018Observed: 17.67 ft at 7:15PM Dec 16, 2018Observed: 17.8 ft at 7:30PM Dec 16, 2018Observed: 17.94 ft at 7:45PM Dec 16, 2018Observed: 18.07 ft at 8:00PM Dec 16, 2018Observed: 18.19 ft at 8:15PM Dec 16, 2018Observed: 18.33 ft at 8:30PM Dec 16, 2018Observed: 18.44 ft at 8:45PM Dec 16, 2018Observed: 18.53 ft at 9:00PM Dec 16, 2018Observed: 18.64 ft at 9:15PM Dec 16, 2018Observed: 18.73 ft at 9:30PM Dec 16, 2018Observed: 18.84 ft at 9:45PM Dec 16, 2018Observed: 18.94 ft at 10:00PM Dec 16, 2018Observed: 19.02 ft at 10:15PM Dec 16, 2018Observed: 19.11 ft at 10:30PM Dec 16, 2018Observed: 19.2 ft at 10:45PM Dec 16, 2018Observed: 19.27 ft at 11:00PM Dec 16, 2018Observed: 19.31 ft at 11:15PM Dec 16, 2018Observed: 19.41 ft at 11:30PM Dec 16, 2018Observed: 19.53 ft at 11:45PM Dec 16, 2018Observed: 19.56 ft at 12:00AM Dec 17, 2018Observed: 19.62 ft at 12:15AM Dec 17, 2018Observed: 19.7 ft at 12:30AM Dec 17, 2018Observed: 19.77 ft at 12:45AM Dec 17, 2018Observed: 19.85 ft at 1:00AM Dec 17, 2018Observed: 19.93 ft at 1:15AM Dec 17, 2018Observed: 19.99 ft at 1:30AM Dec 17, 2018Observed: 20.04 ft at 1:45AM Dec 17, 2018Observed: 20.1 ft at 2:00AM Dec 17, 2018Observed: 20.14 ft at 2:15AM Dec 17, 2018Observed: 20.19 ft at 2:30AM Dec 17, 2018Observed: 20.23 ft at 2:45AM Dec 17, 2018Observed: 20.3 ft at 3:00AM Dec 17, 2018Observed: 20.35 ft at 3:15AM Dec 17, 2018Observed: 20.37 ft at 3:30AM Dec 17, 2018Observed: 20.43 ft at 3:45AM Dec 17, 2018Observed: 20.5 ft at 4:00AM Dec 17, 2018Observed: 20.54 ft at 4:15AM Dec 17, 2018Observed: 20.55 ft at 4:30AM Dec 17, 2018Observed: 20.6 ft at 4:45AM Dec 17, 2018Observed: 20.66 ft at 5:00AM Dec 17, 2018Observed: 20.68 ft at 5:15AM Dec 17, 2018Observed: 20.71 ft at 5:30AM Dec 17, 2018Observed: 20.76 ft at 5:45AM Dec 17, 2018Observed: 20.74 ft at 6:00AM Dec 17, 2018Observed: 20.77 ft at 6:15AM Dec 17, 2018Observed: 20.8 ft at 6:30AM Dec 17, 2018Observed: 20.82 ft at 6:45AM Dec 17, 2018Observed: 20.84 ft at 7:00AM Dec 17, 2018Observed: 20.89 ft at 7:15AM Dec 17, 2018Observed: 20.93 ft at 7:30AM Dec 17, 2018Observed: 20.89 ft at 7:45AM Dec 17, 2018Observed: 20.95 ft at 8:00AM Dec 17, 2018Observed: 20.96 ft at 8:15AM Dec 17, 2018Observed: 20.94 ft at 8:30AM Dec 17, 2018Observed: 20.96 ft at 8:45AM Dec 17, 2018Highest Observation: 20.98 ft at 9:00AM Dec 17, 2018Observed: 20.96 ft at 9:15AM Dec 17, 2018Highest Observation: 20.98 ft at 9:30AM Dec 17, 2018Highest Observation: 20.98 ft at 9:45AM Dec 17, 2018Observed: 20.93 ft at 10:00AM Dec 17, 2018Observed: 20.96 ft at 10:15AM Dec 17, 2018Observed: 20.97 ft at 10:30AM Dec 17, 2018Observed: 20.94 ft at 10:45AM Dec 17, 2018Observed: 20.93 ft at 11:00AM Dec 17, 2018Observed: 20.94 ft at 11:15AM Dec 17, 2018Observed: 20.9 ft at 11:30AM Dec 17, 2018Observed: 20.87 ft at 11:45AM Dec 17, 2018Observed: 20.88 ft at 12:00PM Dec 17, 2018Observed: 20.86 ft at 12:15PM Dec 17, 2018Observed: 20.88 ft at 12:30PM Dec 17, 2018Observed: 20.79 ft at 12:45PM Dec 17, 2018Observed: 20.83 ft at 1:00PM Dec 17, 2018Observed: 20.77 ft at 1:15PM Dec 17, 2018Observed: 20.73 ft at 1:30PM Dec 17, 2018Observed: 20.76 ft at 1:45PM Dec 17, 2018Observed: 20.71 ft at 2:00PM Dec 17, 2018Observed: 20.71 ft at 2:15PM Dec 17, 2018Observed: 20.66 ft at 2:30PM Dec 17, 2018Observed: 20.65 ft at 2:45PM Dec 17, 2018Observed: 20.62 ft at 3:00PM Dec 17, 2018Observed: 20.6 ft at 3:15PM Dec 17, 2018Observed: 20.57 ft at 3:30PM Dec 17, 2018Observed: 20.53 ft at 3:45PM Dec 17, 2018Observed: 20.53 ft at 4:00PM Dec 17, 2018Observed: 20.47 ft at 4:15PM Dec 17, 2018Observed: 20.44 ft at 4:30PM Dec 17, 2018Observed: 20.41 ft at 4:45PM Dec 17, 2018Observed: 20.36 ft at 5:00PM Dec 17, 2018Observed: 20.32 ft at 5:15PM Dec 17, 2018Observed: 20.29 ft at 5:30PM Dec 17, 2018Observed: 20.25 ft at 5:45PM Dec 17, 2018Observed: 20.21 ft at 6:00PM Dec 17, 2018Observed: 20.17 ft at 6:15PM Dec 17, 2018Observed: 20.13 ft at 6:30PM Dec 17, 2018Observed: 20.07 ft at 6:45PM Dec 17, 2018Observed: 20.01 ft at 7:00PM Dec 17, 2018Observed: 19.97 ft at 7:15PM Dec 17, 2018Observed: 19.94 ft at 7:30PM Dec 17, 2018Observed: 19.89 ft at 7:45PM Dec 17, 2018Observed: 19.84 ft at 8:00PM Dec 17, 2018Observed: 19.78 ft at 8:15PM Dec 17, 2018Observed: 19.71 ft at 8:30PM Dec 17, 2018Observed: 19.66 ft at 8:45PM Dec 17, 2018Observed: 19.59 ft at 9:00PM Dec 17, 2018Observed: 19.53 ft at 9:15PM Dec 17, 2018Observed: 19.5 ft at 9:30PM Dec 17, 2018Observed: 19.45 ft at 9:45PM Dec 17, 2018Observed: 19.38 ft at 10:00PM Dec 17, 2018Observed: 19.33 ft at 10:15PM Dec 17, 2018Observed: 19.28 ft at 10:30PM Dec 17, 2018Observed: 19.21 ft at 10:45PM Dec 17, 2018Observed: 19.17 ft at 11:00PM Dec 17, 2018Observed: 19.11 ft at 11:15PM Dec 17, 2018Observed: 19.04 ft at 11:30PM Dec 17, 2018Observed: 18.99 ft at 11:45PM Dec 17, 2018Observed: 18.91 ft at 12:00AM Dec 18, 2018Observed: 18.87 ft at 12:15AM Dec 18, 2018Observed: 18.8 ft at 12:30AM Dec 18, 2018Observed: 18.73 ft at 12:45AM Dec 18, 2018Observed: 18.69 ft at 1:00AM Dec 18, 2018Observed: 18.58 ft at 1:15AM Dec 18, 2018Observed: 18.53 ft at 1:30AM Dec 18, 2018Observed: 18.46 ft at 1:45AM Dec 18, 2018Observed: 18.4 ft at 2:00AM Dec 18, 2018Observed: 18.33 ft at 2:15AM Dec 18, 2018Observed: 18.27 ft at 2:30AM Dec 18, 2018Observed: 18.22 ft at 2:45AM Dec 18, 2018Observed: 18.13 ft at 3:00AM Dec 18, 2018Observed: 18.07 ft at 3:15AM Dec 18, 2018Observed: 17.99 ft at 3:30AM Dec 18, 2018Observed: 17.91 ft at 3:45AM Dec 18, 2018Observed: 17.85 ft at 4:00AM Dec 18, 2018Observed: 17.77 ft at 4:15AM Dec 18, 2018Observed: 17.72 ft at 4:30AM Dec 18, 2018Observed: 17.65 ft at 4:45AM Dec 18, 2018Observed: 17.6 ft at 5:00AM Dec 18, 2018Observed: 17.52 ft at 5:15AM Dec 18, 2018Observed: 17.46 ft at 5:30AM Dec 18, 2018Observed: 17.4 ft at 5:45AM Dec 18, 2018Highest Forecast: 17.2 ft 7:00AM Dec 18, 2018Forecast: 15.4 ft 1:00PM Dec 18, 2018Forecast: 15 ft 2:00PM Dec 18, 2018Forecast: 13.9 ft 7:00PM Dec 18, 2018Forecast: 13.2 ft 1:00AM Dec 19, 2018Forecast: 12.7 ft 7:00AM Dec 19, 2018Forecast: 12.2 ft 1:00PM Dec 19, 2018Forecast: 11.7 ft 7:00PM Dec 19, 2018Forecast: 11.4 ft 1:00AM Dec 20, 2018Forecast: 11 ft 7:00AM Dec 20, 2018Forecast: 10.7 ft 1:00PM Dec 20, 2018Forecast: 10.5 ft 7:00PM Dec 20, 2018USGS--Water Resources of the United StatesEDFM2(plotting HGIRG) Graph Created (6:38AM Dec 18, 2018)ObservedForecast (issued 9:00PM Dec 17)Latest observed value: 17.4 ft at 5:45 AM EST 18-Dec-2018. Flood Stage is 15 ft
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Datum: NAVD88
Metadata
NOTE: Gauge reading may be affected by ice.

NOTE: Forecasts for the Potomac River at Edwards Ferry are issued routinely year-round.

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Upstream Gauge - at Point of Rocks Upstream Gauge Downstream Gauge Downstream Gauge - near Washington DC (Little Falls)
Flood Categories (in feet)
Major Flood Stage: 24
Moderate Flood Stage: 17
Flood Stage: 15
Action Stage: 12.25
Low Stage (in feet): -9999

Historic Crests
(1) 22.45 ft on 06/05/2018
(2) 21.57 ft on 09/29/2018
(3) 21.09 ft on 05/17/2014
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(P): Preliminary values subject to further review.

Recent Crests
(1) 21.57 ft on 09/29/2018
(2) 15.38 ft on 09/27/2018
(3) 20.31 ft on 09/11/2018
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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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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
28 Tchiffely Mill Road begins to flood due to backwater effects. Most of the C&O Canal towpath is flooded.
26 Water covers the lock at Edwards Ferry. The access road to Violettes Lock is flooded.
24 Water reaches the first floor ceiling at Whites Ferry store. Significant portions of the C&O Canal towpath are flooded. Backwater flooding is affecting homes on the Loudoun County side of the river near Broad Run in Sterling.
20 The basements of the Edwards Ferry Lockhouse and Rileys Lockhouse are flooded. Backwater flooding may affect homes on the Loudoun County side of the river near Broad Run in Sterling.
18.5 The parking lot at Edwards Ferry is completely covered by water. The parking lot at Seneca is partially flooded.
17 Floodwaters begin to enter the store at Whites Ferry.
15 Water reaches the boat ramp and lower parking area at Edwards Ferry, and begins to inundate areas near Whites Ferry.
12.25 Water reaches the Whites Ferry area. Ferry service may be suspended.
About This Location Collapse

Latitude: 39.098611° N, Longitude: 77.471111° 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 178.7 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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Hydrologic Resources Additional Resources
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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 5:21 PM
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