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Over 200 USGS real-time streamgages used to support NWS river forecasts and warnings are at risk of being discontinued. Click here for more information from the USGS...


NOTE: Gauge readings may be delayed or temporarily unavailable due to satellite communication issues.
Weather Forecast Office (Baltimore/Washington) Sterling, VA Middle Atlantic River Forecast Center
Hydrograph River at a Glance Download Weekly Chance of
Exceeding Levels		 Chance of Exceeding Levels
During Entire Period
Potomac River near Washington DC (Little Falls) Stage (ft)Flow (kcfs)Observed: 4.1 ft at 7:30AM May 20, 2013Observed: 4.1 ft at 7:45AM May 20, 2013Observed: 4.1 ft at 8:00AM May 20, 2013Observed: 4.09 ft at 8:15AM May 20, 2013Observed: 4.1 ft at 8:30AM May 20, 2013Observed: 4.09 ft at 8:45AM May 20, 2013Observed: 4.09 ft at 9:00AM May 20, 2013Observed: 4.09 ft at 9:15AM May 20, 2013Observed: 4.09 ft at 9:30AM May 20, 2013Observed: 4.09 ft at 9:45AM May 20, 2013Observed: 4.09 ft at 10:00AM May 20, 2013Observed: 4.08 ft at 10:15AM May 20, 2013Observed: 4.08 ft at 10:30AM May 20, 2013Observed: 4.08 ft at 10:45AM May 20, 2013Observed: 4.08 ft at 11:00AM May 20, 2013Observed: 4.08 ft at 11:15AM May 20, 2013Observed: 4.07 ft at 11:30AM May 20, 2013Observed: 4.07 ft at 11:45AM May 20, 2013Observed: 4.08 ft at 12:00PM May 20, 2013Observed: 4.08 ft at 12:15PM May 20, 2013Observed: 4.07 ft at 12:30PM May 20, 2013Observed: 4.07 ft at 12:45PM May 20, 2013Observed: 4.07 ft at 1:00PM May 20, 2013Observed: 4.07 ft at 1:15PM May 20, 2013Observed: 4.07 ft at 1:30PM May 20, 2013Observed: 4.07 ft at 1:45PM May 20, 2013Observed: 4.07 ft at 2:00PM May 20, 2013Observed: 4.06 ft at 2:15PM May 20, 2013Observed: 4.06 ft at 2:30PM May 20, 2013Observed: 4.06 ft at 2:45PM May 20, 2013Observed: 4.06 ft at 3:00PM May 20, 2013Observed: 4.06 ft at 3:15PM May 20, 2013Observed: 4.06 ft at 3:30PM May 20, 2013Observed: 4.06 ft at 3:45PM May 20, 2013Observed: 4.06 ft at 4:00PM May 20, 2013Observed: 4.06 ft at 4:15PM May 20, 2013Observed: 4.05 ft at 4:30PM May 20, 2013Observed: 4.05 ft at 4:45PM May 20, 2013Observed: 4.05 ft at 5:00PM May 20, 2013Observed: 4.05 ft at 5:15PM May 20, 2013Observed: 4.05 ft at 5:30PM May 20, 2013Observed: 4.05 ft at 5:45PM May 20, 2013Observed: 4.05 ft at 6:00PM May 20, 2013Observed: 4.05 ft at 6:15PM May 20, 2013Observed: 4.05 ft at 6:30PM May 20, 2013Observed: 4.05 ft at 6:45PM May 20, 2013Observed: 4.05 ft at 7:00PM May 20, 2013Observed: 4.05 ft at 7:15PM May 20, 2013Observed: 4.05 ft at 7:30PM May 20, 2013Observed: 4.05 ft at 7:45PM May 20, 2013Observed: 4.05 ft at 8:00PM May 20, 2013Observed: 4.05 ft at 8:15PM May 20, 2013Observed: 4.05 ft at 8:30PM May 20, 2013Observed: 4.05 ft at 8:45PM May 20, 2013Observed: 4.05 ft at 9:00PM May 20, 2013Observed: 4.05 ft at 9:15PM May 20, 2013Observed: 4.05 ft at 9:30PM May 20, 2013Observed: 4.05 ft at 9:45PM May 20, 2013Observed: 4.05 ft at 10:00PM May 20, 2013Observed: 4.05 ft at 10:15PM May 20, 2013Observed: 4.04 ft at 10:30PM May 20, 2013Observed: 4.04 ft at 10:45PM May 20, 2013Observed: 4.04 ft at 11:00PM May 20, 2013Observed: 4.04 ft at 11:15PM May 20, 2013Observed: 4.04 ft at 11:30PM May 20, 2013Observed: 4.04 ft at 11:45PM May 20, 2013Observed: 4.04 ft at 12:00AM May 21, 2013Observed: 4.04 ft at 12:15AM May 21, 2013Observed: 4.03 ft at 12:30AM May 21, 2013Observed: 4.03 ft at 12:45AM May 21, 2013Observed: 4.03 ft at 2:00AM May 21, 2013Observed: 4.02 ft at 2:15AM May 21, 2013Observed: 4.02 ft at 2:30AM May 21, 2013Observed: 4.02 ft at 2:45AM May 21, 2013Observed: 4.02 ft at 3:00AM May 21, 2013Observed: 4.02 ft at 3:15AM May 21, 2013Observed: 4.02 ft at 3:30AM May 21, 2013Observed: 4.02 ft at 3:45AM May 21, 2013Observed: 4.01 ft at 4:00AM May 21, 2013Observed: 4.01 ft at 4:15AM May 21, 2013Observed: 4.01 ft at 4:30AM May 21, 2013Observed: 4.01 ft at 4:45AM May 21, 2013Observed: 4.01 ft at 5:00AM May 21, 2013Observed: 4.01 ft at 5:15AM May 21, 2013Observed: 4.01 ft at 5:30AM May 21, 2013Observed: 4.01 ft at 5:45AM May 21, 2013Observed: 4.01 ft at 6:00AM May 21, 2013Observed: 4.01 ft at 6:15AM May 21, 2013Observed: 4.01 ft at 6:30AM May 21, 2013Observed: 4.01 ft at 6:45AM May 21, 2013Observed: 4 ft at 7:00AM May 21, 2013Observed: 4 ft at 7:15AM May 21, 2013Observed: 4 ft at 7:30AM May 21, 2013Observed: 4 ft at 7:45AM May 21, 2013Observed: 4 ft at 8:00AM May 21, 2013Observed: 4 ft at 8:15AM May 21, 2013Observed: 4 ft at 8:30AM May 21, 2013Observed: 4 ft at 8:45AM May 21, 2013Observed: 4 ft at 9:00AM May 21, 2013Observed: 4 ft at 9:15AM May 21, 2013Observed: 4 ft at 9:30AM May 21, 2013Observed: 3.99 ft at 9:45AM May 21, 2013Observed: 3.99 ft at 10:00AM May 21, 2013Observed: 3.99 ft at 10:15AM May 21, 2013Observed: 3.99 ft at 10:30AM May 21, 2013Observed: 3.99 ft at 10:45AM May 21, 2013Observed: 3.99 ft at 11:00AM May 21, 2013Observed: 3.99 ft at 11:15AM May 21, 2013Observed: 3.99 ft at 11:30AM May 21, 2013Observed: 3.99 ft at 11:45AM May 21, 2013Observed: 3.98 ft at 12:00PM May 21, 2013Observed: 3.99 ft at 12:15PM May 21, 2013Observed: 3.98 ft at 12:30PM May 21, 2013Observed: 3.98 ft at 12:45PM May 21, 2013Observed: 3.98 ft at 1:00PM May 21, 2013Observed: 3.98 ft at 1:15PM May 21, 2013Observed: 3.98 ft at 1:30PM May 21, 2013Observed: 3.98 ft at 1:45PM May 21, 2013Observed: 3.98 ft at 2:00PM May 21, 2013Observed: 3.98 ft at 2:15PM May 21, 2013Observed: 3.98 ft at 2:30PM May 21, 2013Observed: 3.98 ft at 2:45PM May 21, 2013Observed: 3.98 ft at 3:00PM May 21, 2013Observed: 3.98 ft at 3:15PM May 21, 2013Observed: 3.98 ft at 3:30PM May 21, 2013Observed: 3.98 ft at 3:45PM May 21, 2013Observed: 3.97 ft at 4:00PM May 21, 2013Observed: 3.97 ft at 4:15PM May 21, 2013Observed: 3.97 ft at 4:30PM May 21, 2013Observed: 3.97 ft at 4:45PM May 21, 2013Observed: 3.97 ft at 5:00PM May 21, 2013Observed: 3.97 ft at 5:15PM May 21, 2013Observed: 3.97 ft at 5:30PM May 21, 2013Observed: 3.97 ft at 5:45PM May 21, 2013Observed: 3.96 ft at 6:00PM May 21, 2013Observed: 3.96 ft at 6:15PM May 21, 2013Observed: 3.96 ft at 6:30PM May 21, 2013Observed: 3.96 ft at 6:45PM May 21, 2013Observed: 3.96 ft at 7:00PM May 21, 2013Observed: 3.95 ft at 7:15PM May 21, 2013Observed: 3.95 ft at 7:30PM May 21, 2013Observed: 3.95 ft at 7:45PM May 21, 2013Observed: 3.95 ft at 8:00PM May 21, 2013Observed: 3.95 ft at 8:15PM May 21, 2013Observed: 3.96 ft at 8:30PM May 21, 2013Observed: 3.95 ft at 8:45PM May 21, 2013Observed: 3.94 ft at 9:00PM May 21, 2013Observed: 3.94 ft at 9:15PM May 21, 2013Observed: 3.94 ft at 9:30PM May 21, 2013Observed: 3.94 ft at 9:45PM May 21, 2013Observed: 3.94 ft at 10:00PM May 21, 2013Observed: 3.94 ft at 10:15PM May 21, 2013Observed: 3.94 ft at 10:30PM May 21, 2013Observed: 3.94 ft at 10:45PM May 21, 2013Observed: 3.94 ft at 11:00PM May 21, 2013Observed: 3.94 ft at 11:15PM May 21, 2013Observed: 3.94 ft at 11:30PM May 21, 2013Observed: 3.94 ft at 11:45PM May 21, 2013Observed: 3.94 ft at 12:00AM May 22, 2013Observed: 3.93 ft at 12:15AM May 22, 2013Observed: 3.93 ft at 12:30AM May 22, 2013Observed: 3.93 ft at 12:45AM May 22, 2013Observed: 3.93 ft at 1:00AM May 22, 2013Observed: 3.93 ft at 1:15AM May 22, 2013Observed: 3.93 ft at 1:30AM May 22, 2013Observed: 3.92 ft at 1:45AM May 22, 2013Observed: 3.92 ft at 2:00AM May 22, 2013Observed: 3.92 ft at 2:15AM May 22, 2013Observed: 3.92 ft at 2:30AM May 22, 2013Observed: 3.92 ft at 2:45AM May 22, 2013Observed: 3.91 ft at 3:00AM May 22, 2013Observed: 3.91 ft at 3:15AM May 22, 2013Observed: 3.91 ft at 3:30AM May 22, 2013Observed: 3.91 ft at 3:45AM May 22, 2013Observed: 3.91 ft at 4:00AM May 22, 2013Observed: 3.91 ft at 4:15AM May 22, 2013Observed: 3.91 ft at 4:30AM May 22, 2013Observed: 3.91 ft at 4:45AM May 22, 2013Observed: 3.91 ft at 5:00AM May 22, 2013Observed: 3.9 ft at 5:15AM May 22, 2013Observed: 3.9 ft at 5:30AM May 22, 2013Observed: 3.9 ft at 5:45AM May 22, 2013Observed: 3.9 ft at 6:00AM May 22, 2013Observed: 3.9 ft at 6:15AM May 22, 2013Observed: 3.9 ft at 6:30AM May 22, 2013Observed: 3.9 ft at 6:45AM May 22, 2013Observed: 3.9 ft at 7:00AM May 22, 2013Observed: 3.9 ft at 7:15AM May 22, 2013Observed: 3.9 ft at 7:30AM May 22, 2013Observed: 3.9 ft at 7:45AM May 22, 2013Observed: 3.9 ft at 8:00AM May 22, 2013Observed: 3.9 ft at 8:15AM May 22, 2013Observed: 3.9 ft at 8:30AM May 22, 2013Observed: 3.9 ft at 8:45AM May 22, 2013Observed: 3.9 ft at 9:00AM May 22, 2013Observed: 3.89 ft at 9:15AM May 22, 2013Observed: 3.9 ft at 9:30AM May 22, 2013Observed: 3.9 ft at 9:45AM May 22, 2013Observed: 3.89 ft at 10:00AM May 22, 2013Observed: 3.89 ft at 10:15AM May 22, 2013Observed: 3.89 ft at 10:30AM May 22, 2013Observed: 3.89 ft at 10:45AM May 22, 2013Observed: 3.89 ft at 11:00AM May 22, 2013Observed: 3.89 ft at 11:15AM May 22, 2013Observed: 3.89 ft at 11:30AM May 22, 2013Observed: 3.89 ft at 11:45AM May 22, 2013Observed: 3.89 ft at 12:00PM May 22, 2013Observed: 3.89 ft at 12:15PM May 22, 2013Observed: 3.89 ft at 12:30PM May 22, 2013Observed: 3.89 ft at 12:45PM May 22, 2013Observed: 3.89 ft at 1:00PM May 22, 2013Observed: 3.89 ft at 1:15PM May 22, 2013Observed: 3.89 ft at 1:30PM May 22, 2013Observed: 3.89 ft at 1:45PM May 22, 2013Observed: 3.89 ft at 2:00PM May 22, 2013Observed: 3.89 ft at 2:15PM May 22, 2013Observed: 3.88 ft at 2:30PM May 22, 2013Observed: 3.88 ft at 2:45PM May 22, 2013Observed: 3.89 ft at 3:00PM May 22, 2013Observed: 3.88 ft at 3:15PM May 22, 2013Observed: 3.89 ft at 3:30PM May 22, 2013Observed: 3.88 ft at 3:45PM May 22, 2013Observed: 3.88 ft at 4:00PM May 22, 2013Observed: 3.88 ft at 4:15PM May 22, 2013Observed: 3.88 ft at 4:30PM May 22, 2013Observed: 3.88 ft at 4:45PM May 22, 2013Observed: 3.88 ft at 5:00PM May 22, 2013Observed: 3.87 ft at 5:15PM May 22, 2013Observed: 3.87 ft at 5:30PM May 22, 2013Observed: 3.87 ft at 5:45PM May 22, 2013Observed: 3.87 ft at 6:00PM May 22, 2013Observed: 3.87 ft at 6:15PM May 22, 2013Observed: 3.87 ft at 6:30PM May 22, 2013Observed: 3.86 ft at 6:45PM May 22, 2013Observed: 3.86 ft at 7:00PM May 22, 2013Observed: 3.86 ft at 7:15PM May 22, 2013Observed: 3.86 ft at 7:30PM May 22, 2013Observed: 3.85 ft at 7:45PM May 22, 2013Observed: 3.85 ft at 8:00PM May 22, 2013Observed: 3.85 ft at 8:15PM May 22, 2013Observed: 3.85 ft at 8:30PM May 22, 2013Observed: 3.85 ft at 8:45PM May 22, 2013Observed: 3.85 ft at 9:00PM May 22, 2013Observed: 3.85 ft at 9:15PM May 22, 2013Observed: 3.85 ft at 9:30PM May 22, 2013Observed: 3.85 ft at 9:45PM May 22, 2013Observed: 3.85 ft at 10:00PM May 22, 2013Observed: 3.86 ft at 10:15PM May 22, 2013Observed: 3.85 ft at 10:30PM May 22, 2013Observed: 3.85 ft at 10:45PM May 22, 2013Observed: 3.85 ft at 11:00PM May 22, 2013Observed: 3.85 ft at 11:15PM May 22, 2013Observed: 3.85 ft at 11:30PM May 22, 2013Observed: 3.85 ft at 11:45PM May 22, 2013Observed: 3.85 ft at 12:00AM May 23, 2013Observed: 3.85 ft at 12:15AM May 23, 2013Observed: 3.85 ft at 12:30AM May 23, 2013Observed: 3.84 ft at 12:45AM May 23, 2013Observed: 3.85 ft at 1:00AM May 23, 2013Observed: 3.85 ft at 1:15AM May 23, 2013Observed: 3.85 ft at 1:30AM May 23, 2013Observed: 3.85 ft at 1:45AM May 23, 2013Observed: 3.85 ft at 2:00AM May 23, 2013Observed: 3.85 ft at 2:15AM May 23, 2013Observed: 3.85 ft at 2:30AM May 23, 2013Observed: 3.85 ft at 2:45AM May 23, 2013Observed: 3.85 ft at 3:00AM May 23, 2013Observed: 3.85 ft at 3:15AM May 23, 2013Observed: 3.85 ft at 3:30AM May 23, 2013Observed: 3.85 ft at 3:45AM May 23, 2013Observed: 3.85 ft at 4:00AM May 23, 2013Observed: 3.85 ft at 4:15AM May 23, 2013Observed: 3.85 ft at 4:30AM May 23, 2013Observed: 3.85 ft at 4:45AM May 23, 2013Observed: 3.85 ft at 5:00AM May 23, 2013Observed: 3.84 ft at 5:15AM May 23, 2013Observed: 3.84 ft at 5:30AM May 23, 2013Observed: 3.84 ft at 5:45AM May 23, 2013Observed: 3.84 ft at 6:00AM May 23, 2013Observed: 3.84 ft at 6:15AM May 23, 2013Observed: 3.84 ft at 6:30AM May 23, 2013Observed: 3.84 ft at 6:45AM May 23, 2013Observed: 3.85 ft at 7:00AM May 23, 2013Observed: 3.85 ft at 7:15AM May 23, 2013Observed: 3.85 ft at 7:30AM May 23, 2013Observed: 3.85 ft at 7:45AM May 23, 2013Observed: 3.85 ft at 8:00AM May 23, 2013Observed: 3.85 ft at 8:15AM May 23, 2013Observed: 3.86 ft at 8:30AM May 23, 2013Observed: 3.86 ft at 8:45AM May 23, 2013Observed: 3.86 ft at 9:00AM May 23, 2013Observed: 3.86 ft at 9:15AM May 23, 2013Observed: 3.86 ft at 9:30AM May 23, 2013Observed: 3.86 ft at 9:45AM May 23, 2013Observed: 3.86 ft at 10:00AM May 23, 2013Observed: 3.87 ft at 10:15AM May 23, 2013Observed: 3.87 ft at 10:30AM May 23, 2013Observed: 3.87 ft at 10:45AM May 23, 2013Observed: 3.87 ft at 11:00AM May 23, 2013Observed: 3.87 ft at 11:15AM May 23, 2013Observed: 3.87 ft at 11:30AM May 23, 2013Observed: 3.87 ft at 11:45AM May 23, 2013Observed: 3.88 ft at 12:00PM May 23, 2013Observed: 3.88 ft at 12:15PM May 23, 2013Observed: 3.88 ft at 12:30PM May 23, 2013Observed: 3.88 ft at 12:45PM May 23, 2013Observed: 3.88 ft at 1:00PM May 23, 2013Observed: 3.89 ft at 1:15PM May 23, 2013Observed: 3.89 ft at 1:30PM May 23, 2013Observed: 3.89 ft at 1:45PM May 23, 2013Observed: 3.89 ft at 2:00PM May 23, 2013Observed: 3.89 ft at 2:15PM May 23, 2013Observed: 3.89 ft at 2:30PM May 23, 2013Observed: 3.89 ft at 2:45PM May 23, 2013Observed: 3.9 ft at 3:00PM May 23, 2013Observed: 3.9 ft at 3:15PM May 23, 2013Observed: 3.9 ft at 3:30PM May 23, 2013Observed: 3.9 ft at 3:45PM May 23, 2013Observed: 3.9 ft at 4:00PM May 23, 2013Observed: 3.9 ft at 4:15PM May 23, 2013Observed: 3.9 ft at 4:30PM May 23, 2013Observed: 3.9 ft at 4:45PM May 23, 2013Observed: 3.9 ft at 5:00PM May 23, 2013Observed: 3.89 ft at 5:15PM May 23, 2013Observed: 3.89 ft at 5:30PM May 23, 2013Observed: 3.89 ft at 5:45PM May 23, 2013Observed: 3.89 ft at 6:00PM May 23, 2013Observed: 3.9 ft at 6:15PM May 23, 2013Observed: 3.9 ft at 6:30PM May 23, 2013Observed: 3.9 ft at 6:45PM May 23, 2013Observed: 3.9 ft at 7:00PM May 23, 2013Observed: 3.9 ft at 7:15PM May 23, 2013Observed: 3.9 ft at 7:30PM May 23, 2013Observed: 3.9 ft at 7:45PM May 23, 2013Observed: 3.9 ft at 8:00PM May 23, 2013Observed: 3.9 ft at 8:15PM May 23, 2013Observed: 3.89 ft at 8:30PM May 23, 2013Observed: 3.89 ft at 8:45PM May 23, 2013Observed: 3.9 ft at 9:00PM May 23, 2013Observed: 3.9 ft at 9:15PM May 23, 2013Observed: 3.9 ft at 9:30PM May 23, 2013Observed: 3.9 ft at 9:45PM May 23, 2013Observed: 3.9 ft at 10:00PM May 23, 2013Observed: 3.9 ft at 10:15PM May 23, 2013Observed: 3.91 ft at 10:30PM May 23, 2013Observed: 3.93 ft at 10:45PM May 23, 2013Observed: 3.94 ft at 11:00PM May 23, 2013Observed: 3.94 ft at 11:15PM May 23, 2013Observed: 3.95 ft at 11:30PM May 23, 2013Observed: 3.95 ft at 11:45PM May 23, 2013Observed: 3.94 ft at 12:00AM May 24, 2013Observed: 3.94 ft at 12:15AM May 24, 2013Observed: 3.94 ft at 12:30AM May 24, 2013Observed: 3.94 ft at 12:45AM May 24, 2013Observed: 3.94 ft at 1:00AM May 24, 2013Observed: 3.94 ft at 1:15AM May 24, 2013Observed: 3.94 ft at 1:30AM May 24, 2013Observed: 3.95 ft at 1:45AM May 24, 2013Observed: 3.95 ft at 2:00AM May 24, 2013Observed: 3.96 ft at 2:15AM May 24, 2013Observed: 3.96 ft at 2:30AM May 24, 2013Observed: 3.97 ft at 2:45AM May 24, 2013Observed: 3.98 ft at 3:00AM May 24, 2013Observed: 3.99 ft at 3:15AM May 24, 2013Observed: 3.99 ft at 3:30AM May 24, 2013Observed: 4 ft at 3:45AM May 24, 2013Observed: 4.01 ft at 4:00AM May 24, 2013Observed: 4.02 ft at 4:15AM May 24, 2013Observed: 4.03 ft at 4:30AM May 24, 2013Observed: 4.04 ft at 4:45AM May 24, 2013Observed: 4.04 ft at 5:00AM May 24, 2013Observed: 4.05 ft at 5:15AM May 24, 2013Observed: 4.05 ft at 5:30AM May 24, 2013Observed: 4.06 ft at 5:45AM May 24, 2013Observed: 4.06 ft at 6:00AM May 24, 2013Observed: 4.07 ft at 6:15AM May 24, 2013Observed: 4.07 ft at 6:30AM May 24, 2013Observed: 4.08 ft at 6:45AM May 24, 2013Observed: 4.09 ft at 7:00AM May 24, 2013Observed: 4.1 ft at 7:15AM May 24, 2013Observed: 4.09 ft at 7:30AM May 24, 2013Observed: 4.1 ft at 7:45AM May 24, 2013Observed: 4.11 ft at 8:00AM May 24, 2013Observed: 4.11 ft at 8:15AM May 24, 2013Observed: 4.12 ft at 8:30AM May 24, 2013Observed: 4.14 ft at 8:45AM May 24, 2013Observed: 4.14 ft at 9:00AM May 24, 2013Observed: 4.16 ft at 9:15AM May 24, 2013Observed: 4.15 ft at 9:30AM May 24, 2013Observed: 4.17 ft at 9:45AM May 24, 2013Observed: 4.19 ft at 10:00AM May 24, 2013Observed: 4.19 ft at 10:15AM May 24, 2013Observed: 4.21 ft at 10:30AM May 24, 2013Observed: 4.22 ft at 10:45AM May 24, 2013Observed: 4.23 ft at 11:00AM May 24, 2013Observed: 4.23 ft at 11:15AM May 24, 2013Observed: 4.25 ft at 11:30AM May 24, 2013Observed: 4.26 ft at 11:45AM May 24, 2013Observed: 4.27 ft at 12:00PM May 24, 2013Observed: 4.28 ft at 12:15PM May 24, 2013Observed: 4.3 ft at 12:30PM May 24, 2013Observed: 4.31 ft at 12:45PM May 24, 2013Observed: 4.32 ft at 1:00PM May 24, 2013Observed: 4.31 ft at 1:15PM May 24, 2013Observed: 4.33 ft at 1:30PM May 24, 2013Observed: 4.33 ft at 1:45PM May 24, 2013Observed: 4.33 ft at 2:00PM May 24, 2013Observed: 4.34 ft at 2:15PM May 24, 2013Observed: 4.35 ft at 2:30PM May 24, 2013Observed: 4.36 ft at 2:45PM May 24, 2013Observed: 4.37 ft at 3:00PM May 24, 2013Highest Observation: 4.38 ft at 3:15PM May 24, 2013Observed: 4.37 ft at 3:30PM May 24, 2013Observed: 4.37 ft at 3:45PM May 24, 2013Highest Observation: 4.38 ft at 4:00PM May 24, 2013Highest Observation: 4.38 ft at 4:15PM May 24, 2013Observed: 4.37 ft at 4:30PM May 24, 2013Highest Observation: 4.38 ft at 4:45PM May 24, 2013Observed: 4.37 ft at 5:00PM May 24, 2013Highest Observation: 4.38 ft at 5:15PM May 24, 2013Observed: 4.37 ft at 5:30PM May 24, 2013Observed: 4.37 ft at 5:45PM May 24, 2013Observed: 4.35 ft at 6:00PM May 24, 2013Highest Observation: 4.38 ft at 6:15PM May 24, 2013Observed: 4.36 ft at 6:30PM May 24, 2013Observed: 4.35 ft at 6:45PM May 24, 2013Observed: 4.34 ft at 7:00PM May 24, 2013Observed: 4.34 ft at 7:15PM May 24, 2013Observed: 4.33 ft at 7:30PM May 24, 2013Observed: 4.33 ft at 7:45PM May 24, 2013Observed: 4.32 ft at 8:00PM May 24, 2013Observed: 4.33 ft at 8:15PM May 24, 2013Observed: 4.32 ft at 8:30PM May 24, 2013Observed: 4.32 ft at 8:45PM May 24, 2013Observed: 4.32 ft at 9:00PM May 24, 2013Observed: 4.32 ft at 9:15PM May 24, 2013Observed: 4.32 ft at 9:30PM May 24, 2013Observed: 4.32 ft at 9:45PM May 24, 2013Observed: 4.31 ft at 10:00PM May 24, 2013Observed: 4.31 ft at 10:15PM May 24, 2013Observed: 4.31 ft at 10:30PM May 24, 2013Observed: 4.31 ft at 10:45PM May 24, 2013Observed: 4.31 ft at 11:00PM May 24, 2013Observed: 4.3 ft at 11:15PM May 24, 2013Observed: 4.3 ft at 11:30PM May 24, 2013Observed: 4.3 ft at 11:45PM May 24, 2013Observed: 4.3 ft at 12:00AM May 25, 2013Observed: 4.3 ft at 12:15AM May 25, 2013Observed: 4.3 ft at 12:30AM May 25, 2013Observed: 4.3 ft at 12:45AM May 25, 2013Observed: 4.3 ft at 1:00AM May 25, 2013Observed: 4.29 ft at 1:15AM May 25, 2013Observed: 4.29 ft at 1:30AM May 25, 2013Observed: 4.29 ft at 1:45AM May 25, 2013Observed: 4.29 ft at 2:00AM May 25, 2013Observed: 4.29 ft at 2:15AM May 25, 2013Observed: 4.29 ft at 2:30AM May 25, 2013Observed: 4.3 ft at 2:45AM May 25, 2013Observed: 4.29 ft at 3:00AM May 25, 2013Observed: 4.29 ft at 3:15AM May 25, 2013Observed: 4.29 ft at 3:30AM May 25, 2013Observed: 4.29 ft at 3:45AM May 25, 2013Observed: 4.29 ft at 4:00AM May 25, 2013Observed: 4.28 ft at 4:15AM May 25, 2013Observed: 4.28 ft at 4:30AM May 25, 2013Observed: 4.28 ft at 4:45AM May 25, 2013Observed: 4.28 ft at 5:00AM May 25, 2013Observed: 4.29 ft at 5:15AM May 25, 2013Observed: 4.29 ft at 5:30AM May 25, 2013Observed: 4.29 ft at 5:45AM May 25, 2013Observed: 4.29 ft at 6:00AM May 25, 2013Observed: 4.29 ft at 6:15AM May 25, 2013Observed: 4.29 ft at 6:30AM May 25, 2013Observed: 4.29 ft at 6:45AM May 25, 2013Forecast: 4.3 ft 8:00AM May 25, 2013Forecast: 4.4 ft 2:00PM May 25, 2013Forecast: 4.4 ft 8:00PM May 25, 2013Forecast: 4.4 ft 2:00AM May 26, 2013Highest Forecast: 4.5 ft 8:00AM May 26, 2013Highest Forecast: 4.5 ft 2:00PM May 26, 2013Forecast: 4.4 ft 8:00PM May 26, 2013Forecast: 4.4 ft 2:00AM May 27, 2013USGS--Water Resources of the United StatesBRKM2(plotting HGIRG) Graph Created (7:24AM May 25, 2013)ObservedForecast (issued 8:44AM May 24)Latest observed value: 4.29 ft at 6:45 AM EDT 25-May-2013. Flood Stage is 10 ft
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NOTE: Forecasts for the Potomac River near Washington DC (Little Falls) are issued routinely year-round.
Return to Area Map
Upstream Gauge - at Edwards Ferry Upstream Gauge Downstream Gauge Downstream Gauge - at Georgetown / Wisconsin Ave
Flood Categories (in feet)
Major Flood Stage:14
Moderate Flood Stage:12
Flood Stage:10
Action Stage:5

Historical Crests
(1) 28.10 ft on 03/19/1936
(2) 26.88 ft on 10/17/1942
(3) 23.30 ft on 04/28/1937
(4) 22.03 ft on 06/24/1972
(5) 19.29 ft on 01/21/1996
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Low Water Records
Legend
Gauge Location
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
17 MOST OF THE C&O CANAL TOWPATH DOWNSTREAM OF EDWARDS FERRY IS FLOODED. TCHIFFELY MILL ROAD IS FLOODED DUE TO BACKWATER EFFECTS. WATER COVERS THE PARKING LOT AT THE ABNER CLOUD HOUSE IN THE DISTRICT OF COLUMBIA.
15 MOST OF THE C&O CANAL TOWPATH FROM EDWARDS FERRY DOWNSTREAM IS FLOODED. WATER COVERS THE LOCK AT EDWARDS FERRY. THE ACCESS ROAD TO VIOLETTES LOCK IS FLOODED. WATER IS FLOWING DOWN THE SIDEWALK NEAR THE GEORGETOWN VISITORS CENTER. THE FLETCHERS BOATHOUSE IS FLOODED.
14 SIGNIFICANT PORTIONS OF THE C&O CANAL TOWPATH ARE FLOODED. THE BLOCKHOUSE POINT PARK IS FLOODED.
13 SIGNIFICANT PORTIONS OF THE C&O TOWPATH ARE FLOODED.
12 THE C&O CANAL OVERFLOWS AT THE GREAT FALLS TAVERN. WATER COVERS THE TOWPATH IN MANY AREAS.
11.5 WATER COVERS THE TOWPATH BETWEEN THE WASHINGTON AQUEDUCT DAM AND SWAINS LOCK...MILEPOSTS 15 AND 16.
11 WATER COVERS THE TOWPATH BETWEEN SWAINS LOCK AND PENNYFIELD LOCK...MILEPOSTS 17 TO 19. THE BASEMENTS OF THE EDWARDS FERRY LOCKHOUSE AND RILEYS LOCKHOUSE ARE FLOODED.
10 WATER BEGINS TO OVERFLOW THE BANKS INTO LOW LYING AREAS ON THE MARYLAND SIDE OF THE RIVER NEAR LITTLE FALLS. UPSTREAM...THE PARKING LOT AT EDWARDS FERRY IS COMPLETELY COVERED BY WATER. THE PARKING LOT AT SENECA IS PARTIALLY COVERED BY WATER.
8.5 WATER REACHES THE BOAT RAMP AND LOWER PARKING AREA AT EDWARDS FERRY.
7 WATER REACHES THE WHITES FERRY AREA IN MONTGOMERY COUNTY MARYLAND. FERRY SERVICE MAY BE SUSPENDED.
5.5 WATER BEGINS TO AFFECT PORTIONS OF THE BILLY GOAT TRAIL BETWEEN GREAT FALLS AND CARDEROCK. THESE TRAILS MAY BE CLOSED.
4.5 THE RIVER REACHES DANGER LEVEL FOR BOATERS...AS DEFINED BY THE STATE OF MARYLAND. CONDITIONS FOR BOATING WILL BE EXTREMELY HAZARDOUS.
3.5 THE RIVER REACHES CAUTION LEVEL FOR BOATERS...AS DEFINED BY THE STATE OF MARYLAND. FAST MOVING WATER AND CHANGING CURRENTS WILL BE EXPERIENCED.
About This Location Collapse

Latitude: 38.949722° N, Longitude: 77.127778° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 10 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 37.95 ft 47.95 ft Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

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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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