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Hydrograph River at a Glance Download
South Branch Potomac River near Petersburg Stage (ft)Flow (kcfs)Highest Observation: 3.9 ft at 3:00PM Oct 14, 2021Highest Observation: 3.9 ft at 3:15PM Oct 14, 2021Highest Observation: 3.9 ft at 3:30PM Oct 14, 2021Highest Observation: 3.9 ft at 3:45PM Oct 14, 2021Highest Observation: 3.9 ft at 4:00PM Oct 14, 2021Highest Observation: 3.9 ft at 4:15PM Oct 14, 2021Highest Observation: 3.9 ft at 4:30PM Oct 14, 2021Highest Observation: 3.9 ft at 4:45PM Oct 14, 2021Observed: 3.89 ft at 5:00PM Oct 14, 2021Observed: 3.89 ft at 5:15PM Oct 14, 2021Highest Observation: 3.9 ft at 5:30PM Oct 14, 2021Observed: 3.89 ft at 5:45PM Oct 14, 2021Observed: 3.89 ft at 6:00PM Oct 14, 2021Observed: 3.89 ft at 6:15PM Oct 14, 2021Observed: 3.89 ft at 6:30PM Oct 14, 2021Observed: 3.89 ft at 6:45PM Oct 14, 2021Observed: 3.89 ft at 7:00PM Oct 14, 2021Observed: 3.89 ft at 7:15PM Oct 14, 2021Observed: 3.89 ft at 7:30PM Oct 14, 2021Observed: 3.89 ft at 7:45PM Oct 14, 2021Observed: 3.89 ft at 8:00PM Oct 14, 2021Observed: 3.89 ft at 8:15PM Oct 14, 2021Observed: 3.89 ft at 8:30PM Oct 14, 2021Observed: 3.89 ft at 8:45PM Oct 14, 2021Observed: 3.89 ft at 9:00PM Oct 14, 2021Observed: 3.89 ft at 9:15PM Oct 14, 2021Observed: 3.89 ft at 9:30PM Oct 14, 2021Observed: 3.89 ft at 9:45PM Oct 14, 2021Observed: 3.89 ft at 10:00PM Oct 14, 2021Observed: 3.89 ft at 10:15PM Oct 14, 2021Observed: 3.89 ft at 10:30PM Oct 14, 2021Observed: 3.89 ft at 10:45PM Oct 14, 2021Observed: 3.89 ft at 11:00PM Oct 14, 2021Observed: 3.89 ft at 11:15PM Oct 14, 2021Observed: 3.88 ft at 11:30PM Oct 14, 2021Observed: 3.89 ft at 11:45PM Oct 14, 2021Observed: 3.89 ft at 12:00AM Oct 15, 2021Observed: 3.89 ft at 12:15AM Oct 15, 2021Observed: 3.88 ft at 12:30AM Oct 15, 2021Observed: 3.88 ft at 12:45AM Oct 15, 2021Observed: 3.88 ft at 1:00AM Oct 15, 2021Observed: 3.88 ft at 1:15AM Oct 15, 2021Observed: 3.88 ft at 1:30AM Oct 15, 2021Observed: 3.88 ft at 1:45AM Oct 15, 2021Observed: 3.88 ft at 2:00AM Oct 15, 2021Observed: 3.88 ft at 2:15AM Oct 15, 2021Observed: 3.88 ft at 2:30AM Oct 15, 2021Observed: 3.88 ft at 2:45AM Oct 15, 2021Observed: 3.88 ft at 3:00AM Oct 15, 2021Observed: 3.88 ft at 3:15AM Oct 15, 2021Observed: 3.88 ft at 3:30AM Oct 15, 2021Observed: 3.88 ft at 3:45AM Oct 15, 2021Observed: 3.88 ft at 4:00AM Oct 15, 2021Observed: 3.88 ft at 4:15AM Oct 15, 2021Observed: 3.88 ft at 4:30AM Oct 15, 2021Observed: 3.88 ft at 4:45AM Oct 15, 2021Observed: 3.88 ft at 5:00AM Oct 15, 2021Observed: 3.88 ft at 5:15AM Oct 15, 2021Observed: 3.88 ft at 5:30AM Oct 15, 2021Observed: 3.88 ft at 5:45AM Oct 15, 2021Observed: 3.88 ft at 6:00AM Oct 15, 2021Observed: 3.87 ft at 6:15AM Oct 15, 2021Observed: 3.88 ft at 6:30AM Oct 15, 2021Observed: 3.88 ft at 6:45AM Oct 15, 2021Observed: 3.88 ft at 7:00AM Oct 15, 2021Observed: 3.87 ft at 7:15AM Oct 15, 2021Observed: 3.88 ft at 7:30AM Oct 15, 2021Observed: 3.88 ft at 7:45AM Oct 15, 2021Observed: 3.87 ft at 8:00AM Oct 15, 2021Observed: 3.88 ft at 8:15AM Oct 15, 2021Observed: 3.88 ft at 8:30AM Oct 15, 2021Observed: 3.87 ft at 8:45AM Oct 15, 2021Observed: 3.87 ft at 9:00AM Oct 15, 2021Observed: 3.88 ft at 9:15AM Oct 15, 2021Observed: 3.87 ft at 9:30AM Oct 15, 2021Observed: 3.87 ft at 9:45AM Oct 15, 2021Observed: 3.87 ft at 10:00AM Oct 15, 2021Observed: 3.88 ft at 10:15AM Oct 15, 2021Observed: 3.88 ft at 10:30AM Oct 15, 2021Observed: 3.87 ft at 10:45AM Oct 15, 2021Observed: 3.87 ft at 11:00AM Oct 15, 2021Observed: 3.87 ft at 11:15AM Oct 15, 2021Observed: 3.88 ft at 11:30AM Oct 15, 2021Observed: 3.88 ft at 11:45AM Oct 15, 2021Observed: 3.87 ft at 12:00PM Oct 15, 2021Observed: 3.87 ft at 12:15PM Oct 15, 2021Observed: 3.87 ft at 12:30PM Oct 15, 2021Observed: 3.87 ft at 12:45PM Oct 15, 2021Observed: 3.87 ft at 1:00PM Oct 15, 2021Observed: 3.87 ft at 1:15PM Oct 15, 2021Observed: 3.87 ft at 1:30PM Oct 15, 2021Observed: 3.87 ft at 1:45PM Oct 15, 2021Observed: 3.87 ft at 2:00PM Oct 15, 2021Observed: 3.87 ft at 2:15PM Oct 15, 2021Observed: 3.87 ft at 2:30PM Oct 15, 2021Observed: 3.87 ft at 2:45PM Oct 15, 2021Observed: 3.87 ft at 3:00PM Oct 15, 2021Observed: 3.87 ft at 3:15PM Oct 15, 2021Observed: 3.87 ft at 3:30PM Oct 15, 2021Observed: 3.87 ft at 3:45PM Oct 15, 2021Observed: 3.87 ft at 4:00PM Oct 15, 2021Observed: 3.87 ft at 4:15PM Oct 15, 2021Observed: 3.87 ft at 4:30PM Oct 15, 2021Observed: 3.87 ft at 4:45PM Oct 15, 2021Observed: 3.87 ft at 5:00PM Oct 15, 2021Observed: 3.87 ft at 5:15PM Oct 15, 2021Observed: 3.87 ft at 5:30PM Oct 15, 2021Observed: 3.87 ft at 5:45PM Oct 15, 2021Observed: 3.87 ft at 6:00PM Oct 15, 2021Observed: 3.87 ft at 6:15PM Oct 15, 2021Observed: 3.88 ft at 6:30PM Oct 15, 2021Observed: 3.88 ft at 6:45PM Oct 15, 2021Observed: 3.88 ft at 7:00PM Oct 15, 2021Observed: 3.88 ft at 7:15PM Oct 15, 2021Observed: 3.88 ft at 7:30PM Oct 15, 2021Observed: 3.88 ft at 7:45PM Oct 15, 2021Observed: 3.87 ft at 8:00PM Oct 15, 2021Observed: 3.87 ft at 8:15PM Oct 15, 2021Observed: 3.87 ft at 8:30PM Oct 15, 2021Observed: 3.88 ft at 8:45PM Oct 15, 2021Observed: 3.87 ft at 9:00PM Oct 15, 2021Observed: 3.88 ft at 9:15PM Oct 15, 2021Observed: 3.88 ft at 9:30PM Oct 15, 2021Observed: 3.87 ft at 9:45PM Oct 15, 2021Observed: 3.88 ft at 10:00PM Oct 15, 2021Observed: 3.87 ft at 10:15PM Oct 15, 2021Observed: 3.87 ft at 10:30PM Oct 15, 2021Observed: 3.87 ft at 10:45PM Oct 15, 2021Observed: 3.87 ft at 11:00PM Oct 15, 2021Observed: 3.87 ft at 11:15PM Oct 15, 2021Observed: 3.87 ft at 11:30PM Oct 15, 2021Observed: 3.87 ft at 11:45PM Oct 15, 2021Observed: 3.87 ft at 12:00AM Oct 16, 2021Observed: 3.87 ft at 12:15AM Oct 16, 2021Observed: 3.87 ft at 12:30AM Oct 16, 2021Observed: 3.87 ft at 12:45AM Oct 16, 2021Observed: 3.87 ft at 1:00AM Oct 16, 2021Observed: 3.87 ft at 1:15AM Oct 16, 2021Observed: 3.87 ft at 1:30AM Oct 16, 2021Observed: 3.87 ft at 1:45AM Oct 16, 2021Observed: 3.86 ft at 2:00AM Oct 16, 2021Observed: 3.87 ft at 2:15AM Oct 16, 2021Observed: 3.87 ft at 2:30AM Oct 16, 2021Observed: 3.86 ft at 2:45AM Oct 16, 2021Observed: 3.86 ft at 3:00AM Oct 16, 2021Observed: 3.86 ft at 3:15AM Oct 16, 2021Observed: 3.87 ft at 3:30AM Oct 16, 2021Observed: 3.86 ft at 3:45AM Oct 16, 2021Observed: 3.86 ft at 4:00AM Oct 16, 2021Observed: 3.86 ft at 4:15AM Oct 16, 2021Observed: 3.86 ft at 4:30AM Oct 16, 2021Observed: 3.86 ft at 4:45AM Oct 16, 2021Observed: 3.86 ft at 5:00AM Oct 16, 2021Observed: 3.86 ft at 5:15AM Oct 16, 2021Observed: 3.86 ft at 5:30AM Oct 16, 2021Observed: 3.86 ft at 5:45AM Oct 16, 2021Observed: 3.86 ft at 6:00AM Oct 16, 2021Observed: 3.86 ft at 6:15AM Oct 16, 2021Observed: 3.86 ft at 6:30AM Oct 16, 2021Observed: 3.86 ft at 6:45AM Oct 16, 2021Observed: 3.86 ft at 7:00AM Oct 16, 2021Observed: 3.86 ft at 7:15AM Oct 16, 2021Observed: 3.86 ft at 7:30AM Oct 16, 2021Observed: 3.86 ft at 7:45AM Oct 16, 2021Observed: 3.86 ft at 8:00AM Oct 16, 2021Observed: 3.86 ft at 8:15AM Oct 16, 2021Observed: 3.86 ft at 8:30AM Oct 16, 2021Observed: 3.86 ft at 8:45AM Oct 16, 2021Observed: 3.86 ft at 9:00AM Oct 16, 2021Observed: 3.86 ft at 9:15AM Oct 16, 2021Observed: 3.86 ft at 9:30AM Oct 16, 2021Observed: 3.87 ft at 9:45AM Oct 16, 2021Observed: 3.86 ft at 10:00AM Oct 16, 2021Observed: 3.86 ft at 10:15AM Oct 16, 2021Observed: 3.86 ft at 10:30AM Oct 16, 2021Observed: 3.86 ft at 10:45AM Oct 16, 2021Observed: 3.87 ft at 11:00AM Oct 16, 2021Observed: 3.87 ft at 11:15AM Oct 16, 2021Observed: 3.87 ft at 11:30AM Oct 16, 2021Observed: 3.87 ft at 11:45AM Oct 16, 2021Observed: 3.87 ft at 12:00PM Oct 16, 2021Observed: 3.87 ft at 12:15PM Oct 16, 2021Observed: 3.87 ft at 12:30PM Oct 16, 2021Observed: 3.87 ft at 12:45PM Oct 16, 2021Observed: 3.87 ft at 1:00PM Oct 16, 2021Observed: 3.87 ft at 1:15PM Oct 16, 2021Observed: 3.87 ft at 1:30PM Oct 16, 2021Observed: 3.87 ft at 1:45PM Oct 16, 2021Observed: 3.87 ft at 2:00PM Oct 16, 2021Observed: 3.87 ft at 2:15PM Oct 16, 2021Observed: 3.87 ft at 2:30PM Oct 16, 2021Observed: 3.86 ft at 2:45PM Oct 16, 2021Observed: 3.87 ft at 3:00PM Oct 16, 2021Observed: 3.86 ft at 3:15PM Oct 16, 2021Observed: 3.87 ft at 3:30PM Oct 16, 2021Observed: 3.86 ft at 3:45PM Oct 16, 2021Observed: 3.86 ft at 4:00PM Oct 16, 2021Observed: 3.86 ft at 4:15PM Oct 16, 2021Observed: 3.86 ft at 4:30PM Oct 16, 2021Observed: 3.86 ft at 4:45PM Oct 16, 2021Observed: 3.86 ft at 5:00PM Oct 16, 2021Observed: 3.86 ft at 5:15PM Oct 16, 2021Observed: 3.86 ft at 5:30PM Oct 16, 2021Observed: 3.86 ft at 5:45PM Oct 16, 2021Observed: 3.86 ft at 6:00PM Oct 16, 2021Observed: 3.86 ft at 6:15PM Oct 16, 2021Observed: 3.86 ft at 6:30PM Oct 16, 2021Observed: 3.86 ft at 6:45PM Oct 16, 2021Observed: 3.86 ft at 7:00PM Oct 16, 2021Observed: 3.86 ft at 7:15PM Oct 16, 2021Observed: 3.86 ft at 7:30PM Oct 16, 2021Observed: 3.85 ft at 7:45PM Oct 16, 2021Observed: 3.86 ft at 8:00PM Oct 16, 2021Observed: 3.85 ft at 8:15PM Oct 16, 2021Observed: 3.86 ft at 8:30PM Oct 16, 2021Observed: 3.85 ft at 8:45PM Oct 16, 2021Observed: 3.85 ft at 9:00PM Oct 16, 2021Observed: 3.86 ft at 9:15PM Oct 16, 2021Observed: 3.85 ft at 9:30PM Oct 16, 2021Observed: 3.86 ft at 9:45PM Oct 16, 2021Observed: 3.85 ft at 10:00PM Oct 16, 2021Observed: 3.86 ft at 10:15PM Oct 16, 2021Observed: 3.85 ft at 10:30PM Oct 16, 2021Observed: 3.86 ft at 10:45PM Oct 16, 2021Observed: 3.86 ft at 11:00PM Oct 16, 2021Observed: 3.86 ft at 11:15PM Oct 16, 2021Observed: 3.86 ft at 11:30PM Oct 16, 2021Observed: 3.85 ft at 11:45PM Oct 16, 2021Observed: 3.85 ft at 12:00AM Oct 17, 2021Observed: 3.85 ft at 12:15AM Oct 17, 2021Observed: 3.85 ft at 12:30AM Oct 17, 2021Observed: 3.85 ft at 12:45AM Oct 17, 2021Observed: 3.85 ft at 1:00AM Oct 17, 2021Observed: 3.85 ft at 1:15AM Oct 17, 2021Observed: 3.85 ft at 1:30AM Oct 17, 2021Observed: 3.85 ft at 1:45AM Oct 17, 2021Observed: 3.85 ft at 2:00AM Oct 17, 2021Observed: 3.85 ft at 2:15AM Oct 17, 2021Observed: 3.86 ft at 2:30AM Oct 17, 2021Observed: 3.85 ft at 2:45AM Oct 17, 2021Observed: 3.85 ft at 3:00AM Oct 17, 2021Observed: 3.85 ft at 3:15AM Oct 17, 2021Observed: 3.85 ft at 3:30AM Oct 17, 2021Observed: 3.85 ft at 3:45AM Oct 17, 2021Observed: 3.85 ft at 4:00AM Oct 17, 2021Observed: 3.85 ft at 4:15AM Oct 17, 2021Observed: 3.85 ft at 4:30AM Oct 17, 2021Observed: 3.85 ft at 4:45AM Oct 17, 2021Observed: 3.85 ft at 5:00AM Oct 17, 2021Observed: 3.85 ft at 5:15AM Oct 17, 2021Observed: 3.85 ft at 5:30AM Oct 17, 2021Observed: 3.85 ft at 5:45AM Oct 17, 2021Observed: 3.85 ft at 6:00AM Oct 17, 2021Observed: 3.85 ft at 6:15AM Oct 17, 2021Observed: 3.85 ft at 6:30AM Oct 17, 2021Observed: 3.85 ft at 6:45AM Oct 17, 2021Observed: 3.85 ft at 7:00AM Oct 17, 2021Observed: 3.86 ft at 7:15AM Oct 17, 2021Observed: 3.85 ft at 7:30AM Oct 17, 2021Observed: 3.85 ft at 7:45AM Oct 17, 2021Observed: 3.85 ft at 8:00AM Oct 17, 2021Observed: 3.86 ft at 8:15AM Oct 17, 2021Observed: 3.85 ft at 8:30AM Oct 17, 2021Observed: 3.86 ft at 8:45AM Oct 17, 2021Observed: 3.85 ft at 9:00AM Oct 17, 2021Observed: 3.85 ft at 9:15AM Oct 17, 2021Observed: 3.86 ft at 9:30AM Oct 17, 2021Observed: 3.86 ft at 9:45AM Oct 17, 2021Observed: 3.86 ft at 10:00AM Oct 17, 2021Observed: 3.86 ft at 10:15AM Oct 17, 2021Observed: 3.86 ft at 10:30AM Oct 17, 2021Observed: 3.86 ft at 10:45AM Oct 17, 2021Observed: 3.86 ft at 11:00AM Oct 17, 2021Observed: 3.86 ft at 11:15AM Oct 17, 2021Observed: 3.85 ft at 11:30AM Oct 17, 2021Observed: 3.85 ft at 11:45AM Oct 17, 2021Observed: 3.86 ft at 12:00PM Oct 17, 2021Observed: 3.86 ft at 12:15PM Oct 17, 2021Observed: 3.85 ft at 12:30PM Oct 17, 2021Observed: 3.85 ft at 12:45PM Oct 17, 2021Observed: 3.85 ft at 1:00PM Oct 17, 2021Observed: 3.85 ft at 1:15PM Oct 17, 2021Observed: 3.85 ft at 1:30PM Oct 17, 2021Observed: 3.85 ft at 1:45PM Oct 17, 2021Observed: 3.85 ft at 2:00PM Oct 17, 2021Observed: 3.85 ft at 2:15PM Oct 17, 2021Observed: 3.84 ft at 2:30PM Oct 17, 2021Observed: 3.84 ft at 2:45PM Oct 17, 2021Observed: 3.84 ft at 3:00PM Oct 17, 2021Observed: 3.85 ft at 3:15PM Oct 17, 2021Observed: 3.85 ft at 3:30PM Oct 17, 2021Observed: 3.84 ft at 3:45PM Oct 17, 2021Observed: 3.84 ft at 4:00PM Oct 17, 2021Observed: 3.84 ft at 4:15PM Oct 17, 2021Observed: 3.85 ft at 4:30PM Oct 17, 2021Observed: 3.85 ft at 4:45PM Oct 17, 2021Observed: 3.84 ft at 5:00PM Oct 17, 2021Observed: 3.84 ft at 5:15PM Oct 17, 2021Observed: 3.84 ft at 5:30PM Oct 17, 2021Observed: 3.84 ft at 5:45PM Oct 17, 2021Observed: 3.84 ft at 6:00PM Oct 17, 2021Observed: 3.84 ft at 6:15PM Oct 17, 2021Observed: 3.84 ft at 6:30PM Oct 17, 2021Observed: 3.84 ft at 6:45PM Oct 17, 2021Observed: 3.84 ft at 7:00PM Oct 17, 2021Observed: 3.84 ft at 7:15PM Oct 17, 2021Observed: 3.84 ft at 7:30PM Oct 17, 2021Observed: 3.84 ft at 7:45PM Oct 17, 2021Observed: 3.84 ft at 8:00PM Oct 17, 2021Observed: 3.84 ft at 8:15PM Oct 17, 2021Observed: 3.84 ft at 8:30PM Oct 17, 2021Observed: 3.84 ft at 8:45PM Oct 17, 2021Observed: 3.85 ft at 9:00PM Oct 17, 2021Observed: 3.84 ft at 9:15PM Oct 17, 2021Observed: 3.84 ft at 9:30PM Oct 17, 2021Observed: 3.85 ft at 9:45PM Oct 17, 2021Observed: 3.84 ft at 10:00PM Oct 17, 2021Observed: 3.84 ft at 10:15PM Oct 17, 2021Observed: 3.84 ft at 10:30PM Oct 17, 2021Observed: 3.84 ft at 10:45PM Oct 17, 2021Observed: 3.84 ft at 11:00PM Oct 17, 2021Observed: 3.84 ft at 11:15PM Oct 17, 2021Observed: 3.85 ft at 11:30PM Oct 17, 2021Observed: 3.85 ft at 11:45PM Oct 17, 2021Observed: 3.84 ft at 12:00AM Oct 18, 2021Observed: 3.85 ft at 12:15AM Oct 18, 2021Observed: 3.85 ft at 12:30AM Oct 18, 2021Observed: 3.85 ft at 12:45AM Oct 18, 2021Observed: 3.85 ft at 1:00AM Oct 18, 2021Observed: 3.85 ft at 1:15AM Oct 18, 2021Observed: 3.85 ft at 1:30AM Oct 18, 2021Observed: 3.85 ft at 1:45AM Oct 18, 2021Observed: 3.85 ft at 2:00AM Oct 18, 2021Observed: 3.85 ft at 2:15AM Oct 18, 2021Observed: 3.85 ft at 2:30AM Oct 18, 2021Observed: 3.85 ft at 2:45AM Oct 18, 2021Observed: 3.85 ft at 3:00AM Oct 18, 2021Observed: 3.85 ft at 3:15AM Oct 18, 2021Observed: 3.85 ft at 3:30AM Oct 18, 2021Observed: 3.85 ft at 3:45AM Oct 18, 2021Observed: 3.85 ft at 4:00AM Oct 18, 2021Observed: 3.85 ft at 4:15AM Oct 18, 2021Observed: 3.85 ft at 4:30AM Oct 18, 2021Observed: 3.85 ft at 4:45AM Oct 18, 2021Observed: 3.85 ft at 5:00AM Oct 18, 2021Observed: 3.85 ft at 5:15AM Oct 18, 2021Observed: 3.85 ft at 5:30AM Oct 18, 2021Observed: 3.85 ft at 5:45AM Oct 18, 2021Observed: 3.85 ft at 6:00AM Oct 18, 2021Observed: 3.85 ft at 6:15AM Oct 18, 2021Observed: 3.85 ft at 6:30AM Oct 18, 2021Observed: 3.85 ft at 6:45AM Oct 18, 2021Observed: 3.85 ft at 7:00AM Oct 18, 2021Observed: 3.85 ft at 8:15AM Oct 18, 2021Observed: 3.85 ft at 8:30AM Oct 18, 2021Observed: 3.85 ft at 8:45AM Oct 18, 2021Observed: 3.85 ft at 9:00AM Oct 18, 2021Observed: 3.85 ft at 9:15AM Oct 18, 2021Observed: 3.85 ft at 9:30AM Oct 18, 2021Observed: 3.85 ft at 9:45AM Oct 18, 2021Observed: 3.85 ft at 10:00AM Oct 18, 2021Observed: 3.85 ft at 10:15AM Oct 18, 2021Observed: 3.85 ft at 10:30AM Oct 18, 2021Observed: 3.85 ft at 10:45AM Oct 18, 2021Observed: 3.85 ft at 11:00AM Oct 18, 2021Observed: 3.85 ft at 11:15AM Oct 18, 2021Observed: 3.85 ft at 11:30AM Oct 18, 2021Observed: 3.85 ft at 11:45AM Oct 18, 2021Observed: 3.85 ft at 12:00PM Oct 18, 2021Observed: 3.86 ft at 12:15PM Oct 18, 2021Observed: 3.86 ft at 12:30PM Oct 18, 2021Observed: 3.86 ft at 12:45PM Oct 18, 2021Observed: 3.86 ft at 1:00PM Oct 18, 2021Observed: 3.86 ft at 1:15PM Oct 18, 2021Observed: 3.86 ft at 1:30PM Oct 18, 2021Observed: 3.85 ft at 1:45PM Oct 18, 2021Observed: 3.86 ft at 2:00PM Oct 18, 2021Observed: 3.86 ft at 2:15PM Oct 18, 2021Observed: 3.85 ft at 2:30PM Oct 18, 2021Observed: 3.85 ft at 2:45PM Oct 18, 2021Observed: 3.85 ft at 3:00PM Oct 18, 2021Observed: 3.85 ft at 3:15PM Oct 18, 2021Observed: 3.85 ft at 3:30PM Oct 18, 2021Observed: 3.85 ft at 3:45PM Oct 18, 2021Observed: 3.85 ft at 4:00PM Oct 18, 2021Observed: 3.85 ft at 4:15PM Oct 18, 2021Observed: 3.85 ft at 4:30PM Oct 18, 2021Observed: 3.85 ft at 4:45PM Oct 18, 2021Observed: 3.85 ft at 5:00PM Oct 18, 2021Observed: 3.85 ft at 5:15PM Oct 18, 2021Observed: 3.85 ft at 5:30PM Oct 18, 2021Observed: 3.85 ft at 5:45PM Oct 18, 2021Observed: 3.85 ft at 6:00PM Oct 18, 2021Observed: 3.85 ft at 6:15PM Oct 18, 2021Observed: 3.85 ft at 6:30PM Oct 18, 2021Observed: 3.84 ft at 6:45PM Oct 18, 2021Observed: 3.84 ft at 7:00PM Oct 18, 2021Observed: 3.85 ft at 7:15PM Oct 18, 2021Observed: 3.84 ft at 7:30PM Oct 18, 2021Observed: 3.84 ft at 7:45PM Oct 18, 2021Observed: 3.84 ft at 8:00PM Oct 18, 2021Observed: 3.84 ft at 8:15PM Oct 18, 2021Observed: 3.84 ft at 8:30PM Oct 18, 2021Observed: 3.84 ft at 8:45PM Oct 18, 2021Observed: 3.84 ft at 9:00PM Oct 18, 2021Observed: 3.84 ft at 9:15PM Oct 18, 2021Observed: 3.84 ft at 9:30PM Oct 18, 2021Observed: 3.84 ft at 9:45PM Oct 18, 2021Observed: 3.84 ft at 10:00PM Oct 18, 2021Observed: 3.84 ft at 10:15PM Oct 18, 2021Observed: 3.84 ft at 10:30PM Oct 18, 2021Observed: 3.84 ft at 10:45PM Oct 18, 2021Observed: 3.84 ft at 11:00PM Oct 18, 2021Observed: 3.84 ft at 11:15PM Oct 18, 2021Observed: 3.84 ft at 11:30PM Oct 18, 2021Observed: 3.84 ft at 11:45PM Oct 18, 2021Observed: 3.84 ft at 12:00AM Oct 19, 2021Observed: 3.84 ft at 12:15AM Oct 19, 2021Observed: 3.84 ft at 12:30AM Oct 19, 2021Observed: 3.84 ft at 12:45AM Oct 19, 2021Observed: 3.84 ft at 1:00AM Oct 19, 2021Observed: 3.83 ft at 1:15AM Oct 19, 2021Observed: 3.83 ft at 1:30AM Oct 19, 2021Observed: 3.83 ft at 1:45AM Oct 19, 2021Observed: 3.83 ft at 2:00AM Oct 19, 2021Observed: 3.83 ft at 2:15AM Oct 19, 2021Observed: 3.83 ft at 2:30AM Oct 19, 2021Observed: 3.83 ft at 2:45AM Oct 19, 2021Observed: 3.83 ft at 3:00AM Oct 19, 2021Observed: 3.83 ft at 3:15AM Oct 19, 2021Observed: 3.83 ft at 3:30AM Oct 19, 2021Observed: 3.83 ft at 3:45AM Oct 19, 2021Observed: 3.83 ft at 4:00AM Oct 19, 2021Observed: 3.82 ft at 4:15AM Oct 19, 2021Observed: 3.83 ft at 4:30AM Oct 19, 2021Observed: 3.83 ft at 4:45AM Oct 19, 2021Observed: 3.83 ft at 5:00AM Oct 19, 2021Observed: 3.83 ft at 5:15AM Oct 19, 2021Observed: 3.82 ft at 5:30AM Oct 19, 2021Observed: 3.82 ft at 5:45AM Oct 19, 2021Observed: 3.82 ft at 6:00AM Oct 19, 2021Observed: 3.82 ft at 6:15AM Oct 19, 2021Observed: 3.82 ft at 6:30AM Oct 19, 2021Observed: 3.82 ft at 6:45AM Oct 19, 2021Observed: 3.82 ft at 7:00AM Oct 19, 2021Observed: 3.82 ft at 7:15AM Oct 19, 2021Observed: 3.82 ft at 7:30AM Oct 19, 2021Observed: 3.82 ft at 7:45AM Oct 19, 2021Observed: 3.82 ft at 8:00AM Oct 19, 2021Observed: 3.82 ft at 8:15AM Oct 19, 2021Observed: 3.82 ft at 8:30AM Oct 19, 2021Observed: 3.82 ft at 8:45AM Oct 19, 2021Observed: 3.82 ft at 9:00AM Oct 19, 2021Observed: 3.82 ft at 9:15AM Oct 19, 2021Observed: 3.82 ft at 9:30AM Oct 19, 2021Observed: 3.82 ft at 9:45AM Oct 19, 2021Observed: 3.82 ft at 10:00AM Oct 19, 2021Observed: 3.82 ft at 10:15AM Oct 19, 2021Observed: 3.82 ft at 10:30AM Oct 19, 2021Observed: 3.82 ft at 10:45AM Oct 19, 2021Observed: 3.82 ft at 11:00AM Oct 19, 2021Observed: 3.82 ft at 11:15AM Oct 19, 2021Observed: 3.82 ft at 11:30AM Oct 19, 2021Observed: 3.82 ft at 11:45AM Oct 19, 2021Observed: 3.82 ft at 12:00PM Oct 19, 2021Observed: 3.82 ft at 12:15PM Oct 19, 2021Observed: 3.81 ft at 12:30PM Oct 19, 2021Observed: 3.81 ft at 12:45PM Oct 19, 2021Observed: 3.81 ft at 1:00PM Oct 19, 2021Observed: 3.81 ft at 1:15PM Oct 19, 2021Observed: 3.81 ft at 1:30PM Oct 19, 2021Observed: 3.81 ft at 1:45PM Oct 19, 2021Observed: 3.81 ft at 2:00PM Oct 19, 2021Highest Forecast: 3.8 ft 8:00PM Oct 19, 2021Highest Forecast: 3.8 ft 2:00AM Oct 20, 2021Highest Forecast: 3.8 ft 8:00AM Oct 20, 2021Highest Forecast: 3.8 ft 2:00PM Oct 20, 2021Highest Forecast: 3.8 ft 8:00PM Oct 20, 2021Highest Forecast: 3.8 ft 2:00AM Oct 21, 2021Highest Forecast: 3.8 ft 8:00AM Oct 21, 2021Highest Forecast: 3.8 ft 2:00PM Oct 21, 2021Highest Forecast: 3.8 ft 8:00PM Oct 21, 2021Highest Forecast: 3.8 ft 2:00AM Oct 22, 2021Highest Forecast: 3.8 ft 8:00AM Oct 22, 2021USGS--Water Resources of the United StatesPETW2(plotting HGIRG) Graph Created (2:55PM Oct 19, 2021)ObservedForecast (issued 8:42AM Oct 19)Latest observed value: 3.81 ft at 2:00 PM EDT 19-Oct-2021. Flood Stage is 14 ft
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Datum: Not Available
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NOTE: Forecasts for the South Branch Potomac River near Petersburg are issued routinely year-round.
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Upstream Gauge - at Franklin Upstream Gauge Downstream Gauge Downstream Gauge - near Springfield
Flood Categories (in feet)
Major Flood Stage: 17
Moderate Flood Stage: 15
Flood Stage: 14
Action Stage: 12
Low Stage (in feet): -9999

Historic Crests
(1) 22.83 ft on 06/17/1949
(2) 22.20 ft on 09/06/1996
(3) 21.80 ft on 11/05/1985
(4) 21.20 ft on 11/24/1877
(5) 20.30 ft on 03/17/1936
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(P): Preliminary values subject to further review.

Recent Crests
(1) 16.93 ft on 04/16/2018
(2) 14.38 ft on 05/16/2014
(3) 12.80 ft on 05/08/2013
(4) 11.80 ft on 05/18/2011
(5) 12.32 ft on 04/17/2011
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.40 ft on 08/20/1988

For more information on your flood risk go to www.floodsmart.gov.
Zoom Level:14
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 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
22.5 Significant flooding is occurring. More than a hundred buildings in Petersburg are flooded.
20 Several city blocks on the south side of Petersburg are flooded. Backwater may also flood portions of the eastern sections of the city.
18 Water covers the entire runway at Grant County Airport and is in nearby structures. Hundreds of acres of lowlands are flooded. Water approaches homes on the north side of the river in Petersburg.
17 Water reaches structures at the Grant County Airport. Flooding also begins south of the river on the south side of Petersburg.
15 Two structures are flooded upstream of Petersburg. Water also approaches the runway at the Petersburg Airport.
14 Water approaches structures upstream of Petersburg. Water also begins to cover Fish Hatchery Road near the river.
12 Water overflows the natural banks into nearby lowlands. River Road alongside the river begins to flood in its lowest spots.
About This Location Collapse

Latitude: 38.991111° N, Longitude: 79.176111° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 14 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 29 968.34 ft 981.34 ft 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
10 Day (HEFS) 7 Day (NAEFS) 7 Day (GEFS)
HEFS Ensemble NAEFS Ensemble  GEFS Ensemble 

Note: Use the official hydrograph at the top of this web page for river levels within the next 72 hours.

Click individual graphics to enlarge.
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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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