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Hydrograph River at a Glance Download
Difficult Run near Great Falls Stage (ft)Flow (cfs)Highest Observation: 3.21 ft at 1:15PM May 24, 2020Observed: 3.2 ft at 1:30PM May 24, 2020Observed: 3.2 ft at 1:45PM May 24, 2020Observed: 3.2 ft at 2:00PM May 24, 2020Observed: 3.2 ft at 2:15PM May 24, 2020Observed: 3.2 ft at 2:30PM May 24, 2020Observed: 3.2 ft at 2:45PM May 24, 2020Observed: 3.2 ft at 3:00PM May 24, 2020Observed: 3.2 ft at 3:15PM May 24, 2020Observed: 3.19 ft at 3:30PM May 24, 2020Observed: 3.19 ft at 3:45PM May 24, 2020Observed: 3.19 ft at 4:00PM May 24, 2020Observed: 3.19 ft at 4:15PM May 24, 2020Observed: 3.19 ft at 4:30PM May 24, 2020Observed: 3.19 ft at 4:45PM May 24, 2020Observed: 3.19 ft at 5:00PM May 24, 2020Observed: 3.19 ft at 5:15PM May 24, 2020Observed: 3.19 ft at 5:30PM May 24, 2020Observed: 3.19 ft at 5:45PM May 24, 2020Observed: 3.19 ft at 6:00PM May 24, 2020Observed: 3.18 ft at 6:15PM May 24, 2020Observed: 3.18 ft at 6:30PM May 24, 2020Observed: 3.18 ft at 6:45PM May 24, 2020Observed: 3.18 ft at 7:00PM May 24, 2020Observed: 3.18 ft at 7:15PM May 24, 2020Observed: 3.18 ft at 7:30PM May 24, 2020Observed: 3.18 ft at 7:45PM May 24, 2020Observed: 3.18 ft at 8:00PM May 24, 2020Observed: 3.18 ft at 8:15PM May 24, 2020Observed: 3.18 ft at 8:30PM May 24, 2020Observed: 3.18 ft at 8:45PM May 24, 2020Observed: 3.17 ft at 9:00PM May 24, 2020Observed: 3.17 ft at 9:15PM May 24, 2020Observed: 3.17 ft at 9:30PM May 24, 2020Observed: 3.17 ft at 9:45PM May 24, 2020Observed: 3.17 ft at 10:00PM May 24, 2020Observed: 3.17 ft at 10:15PM May 24, 2020Observed: 3.17 ft at 10:30PM May 24, 2020Observed: 3.17 ft at 10:45PM May 24, 2020Observed: 3.17 ft at 11:00PM May 24, 2020Observed: 3.17 ft at 11:15PM May 24, 2020Observed: 3.17 ft at 11:30PM May 24, 2020Observed: 3.17 ft at 11:45PM May 24, 2020Observed: 3.17 ft at 12:00AM May 25, 2020Observed: 3.17 ft at 12:15AM May 25, 2020Observed: 3.17 ft at 12:30AM May 25, 2020Observed: 3.17 ft at 12:45AM May 25, 2020Observed: 3.16 ft at 1:00AM May 25, 2020Observed: 3.16 ft at 1:15AM May 25, 2020Observed: 3.16 ft at 1:30AM May 25, 2020Observed: 3.16 ft at 1:45AM May 25, 2020Observed: 3.16 ft at 2:00AM May 25, 2020Observed: 3.16 ft at 2:15AM May 25, 2020Observed: 3.16 ft at 2:30AM May 25, 2020Observed: 3.16 ft at 2:45AM May 25, 2020Observed: 3.16 ft at 3:00AM May 25, 2020Observed: 3.16 ft at 3:15AM May 25, 2020Observed: 3.16 ft at 3:30AM May 25, 2020Observed: 3.16 ft at 3:45AM May 25, 2020Observed: 3.16 ft at 4:00AM May 25, 2020Observed: 3.16 ft at 4:15AM May 25, 2020Observed: 3.16 ft at 4:30AM May 25, 2020Observed: 3.16 ft at 4:45AM May 25, 2020Observed: 3.16 ft at 5:00AM May 25, 2020Observed: 3.16 ft at 5:15AM May 25, 2020Observed: 3.16 ft at 5:30AM May 25, 2020Observed: 3.16 ft at 5:45AM May 25, 2020Observed: 3.16 ft at 6:00AM May 25, 2020Observed: 3.16 ft at 6:15AM May 25, 2020Observed: 3.15 ft at 6:30AM May 25, 2020Observed: 3.15 ft at 6:45AM May 25, 2020Observed: 3.15 ft at 7:00AM May 25, 2020Observed: 3.15 ft at 7:15AM May 25, 2020Observed: 3.15 ft at 7:30AM May 25, 2020Observed: 3.15 ft at 7:45AM May 25, 2020Observed: 3.15 ft at 8:00AM May 25, 2020Observed: 3.15 ft at 8:15AM May 25, 2020Observed: 3.15 ft at 8:30AM May 25, 2020Observed: 3.15 ft at 8:45AM May 25, 2020Observed: 3.15 ft at 9:00AM May 25, 2020Observed: 3.15 ft at 9:15AM May 25, 2020Observed: 3.15 ft at 9:30AM May 25, 2020Observed: 3.15 ft at 9:45AM May 25, 2020Observed: 3.15 ft at 10:00AM May 25, 2020Observed: 3.15 ft at 10:15AM May 25, 2020Observed: 3.15 ft at 10:30AM May 25, 2020Observed: 3.15 ft at 10:45AM May 25, 2020Observed: 3.15 ft at 11:00AM May 25, 2020Observed: 3.15 ft at 11:15AM May 25, 2020Observed: 3.15 ft at 11:30AM May 25, 2020Observed: 3.15 ft at 11:45AM May 25, 2020Observed: 3.15 ft at 12:00PM May 25, 2020Observed: 3.15 ft at 12:15PM May 25, 2020Observed: 3.15 ft at 12:30PM May 25, 2020Observed: 3.15 ft at 12:45PM May 25, 2020Observed: 3.15 ft at 1:00PM May 25, 2020Observed: 3.15 ft at 1:15PM May 25, 2020Observed: 3.15 ft at 1:30PM May 25, 2020Observed: 3.15 ft at 1:45PM May 25, 2020Observed: 3.15 ft at 2:00PM May 25, 2020Observed: 3.15 ft at 2:15PM May 25, 2020Observed: 3.15 ft at 2:30PM May 25, 2020Observed: 3.15 ft at 2:45PM May 25, 2020Observed: 3.15 ft at 3:00PM May 25, 2020Observed: 3.15 ft at 3:15PM May 25, 2020Observed: 3.15 ft at 3:30PM May 25, 2020Observed: 3.15 ft at 3:45PM May 25, 2020Observed: 3.15 ft at 4:00PM May 25, 2020Observed: 3.15 ft at 4:15PM May 25, 2020Observed: 3.15 ft at 4:30PM May 25, 2020Observed: 3.15 ft at 4:45PM May 25, 2020Observed: 3.15 ft at 5:00PM May 25, 2020Observed: 3.15 ft at 5:15PM May 25, 2020Observed: 3.14 ft at 5:30PM May 25, 2020Observed: 3.14 ft at 5:45PM May 25, 2020Observed: 3.14 ft at 6:00PM May 25, 2020Observed: 3.14 ft at 6:15PM May 25, 2020Observed: 3.14 ft at 6:30PM May 25, 2020Observed: 3.14 ft at 6:45PM May 25, 2020Observed: 3.14 ft at 7:00PM May 25, 2020Observed: 3.14 ft at 7:15PM May 25, 2020Observed: 3.14 ft at 7:30PM May 25, 2020Observed: 3.14 ft at 7:45PM May 25, 2020Observed: 3.14 ft at 8:00PM May 25, 2020Observed: 3.14 ft at 8:15PM May 25, 2020Observed: 3.14 ft at 8:30PM May 25, 2020Observed: 3.14 ft at 8:45PM May 25, 2020Observed: 3.14 ft at 9:00PM May 25, 2020Observed: 3.14 ft at 9:15PM May 25, 2020Observed: 3.14 ft at 9:30PM May 25, 2020Observed: 3.14 ft at 9:45PM May 25, 2020Observed: 3.14 ft at 10:00PM May 25, 2020Observed: 3.14 ft at 10:15PM May 25, 2020Observed: 3.14 ft at 10:30PM May 25, 2020Observed: 3.14 ft at 10:45PM May 25, 2020Observed: 3.14 ft at 11:00PM May 25, 2020Observed: 3.14 ft at 11:15PM May 25, 2020Observed: 3.14 ft at 11:30PM May 25, 2020Observed: 3.14 ft at 11:45PM May 25, 2020Observed: 3.14 ft at 12:00AM May 26, 2020Observed: 3.13 ft at 12:15AM May 26, 2020Observed: 3.13 ft at 12:30AM May 26, 2020Observed: 3.13 ft at 12:45AM May 26, 2020Observed: 3.13 ft at 1:00AM May 26, 2020Observed: 3.13 ft at 1:15AM May 26, 2020Observed: 3.13 ft at 1:30AM May 26, 2020Observed: 3.13 ft at 1:45AM May 26, 2020Observed: 3.13 ft at 2:00AM May 26, 2020Observed: 3.13 ft at 2:15AM May 26, 2020Observed: 3.13 ft at 2:30AM May 26, 2020Observed: 3.13 ft at 2:45AM May 26, 2020Observed: 3.13 ft at 3:00AM May 26, 2020Observed: 3.13 ft at 3:15AM May 26, 2020Observed: 3.13 ft at 3:30AM May 26, 2020Observed: 3.13 ft at 3:45AM May 26, 2020Observed: 3.13 ft at 4:00AM May 26, 2020Observed: 3.13 ft at 4:15AM May 26, 2020Observed: 3.13 ft at 4:30AM May 26, 2020Observed: 3.12 ft at 4:45AM May 26, 2020Observed: 3.12 ft at 5:00AM May 26, 2020Observed: 3.12 ft at 5:15AM May 26, 2020Observed: 3.12 ft at 5:30AM May 26, 2020Observed: 3.12 ft at 5:45AM May 26, 2020Observed: 3.12 ft at 6:00AM May 26, 2020Observed: 3.12 ft at 6:15AM May 26, 2020Observed: 3.12 ft at 6:30AM May 26, 2020Observed: 3.12 ft at 6:45AM May 26, 2020Observed: 3.12 ft at 7:00AM May 26, 2020Observed: 3.12 ft at 7:15AM May 26, 2020Observed: 3.12 ft at 7:30AM May 26, 2020Observed: 3.12 ft at 7:45AM May 26, 2020Observed: 3.12 ft at 8:00AM May 26, 2020Observed: 3.12 ft at 8:15AM May 26, 2020Observed: 3.12 ft at 8:30AM May 26, 2020Observed: 3.12 ft at 8:45AM May 26, 2020Observed: 3.12 ft at 9:00AM May 26, 2020Observed: 3.12 ft at 9:15AM May 26, 2020Observed: 3.12 ft at 9:30AM May 26, 2020Observed: 3.12 ft at 9:45AM May 26, 2020Observed: 3.12 ft at 10:00AM May 26, 2020Observed: 3.12 ft at 10:15AM May 26, 2020Observed: 3.12 ft at 10:30AM May 26, 2020Observed: 3.12 ft at 10:45AM May 26, 2020Observed: 3.12 ft at 11:00AM May 26, 2020Observed: 3.12 ft at 11:15AM May 26, 2020Observed: 3.12 ft at 11:30AM May 26, 2020Observed: 3.12 ft at 11:45AM May 26, 2020Observed: 3.12 ft at 12:00PM May 26, 2020Observed: 3.12 ft at 12:15PM May 26, 2020Observed: 3.12 ft at 12:30PM May 26, 2020Observed: 3.12 ft at 12:45PM May 26, 2020Observed: 3.12 ft at 1:00PM May 26, 2020Observed: 3.12 ft at 1:15PM May 26, 2020Observed: 3.12 ft at 1:30PM May 26, 2020Observed: 3.12 ft at 1:45PM May 26, 2020Observed: 3.12 ft at 2:00PM May 26, 2020Observed: 3.12 ft at 2:15PM May 26, 2020Observed: 3.12 ft at 2:30PM May 26, 2020Observed: 3.12 ft at 2:45PM May 26, 2020Observed: 3.12 ft at 3:00PM May 26, 2020Observed: 3.12 ft at 3:15PM May 26, 2020Observed: 3.12 ft at 3:30PM May 26, 2020Observed: 3.12 ft at 3:45PM May 26, 2020Observed: 3.12 ft at 4:00PM May 26, 2020Observed: 3.12 ft at 4:15PM May 26, 2020Observed: 3.12 ft at 4:30PM May 26, 2020Observed: 3.12 ft at 4:45PM May 26, 2020Observed: 3.12 ft at 5:00PM May 26, 2020Observed: 3.12 ft at 5:15PM May 26, 2020Observed: 3.12 ft at 5:30PM May 26, 2020Observed: 3.12 ft at 5:45PM May 26, 2020Observed: 3.12 ft at 6:00PM May 26, 2020Observed: 3.12 ft at 6:15PM May 26, 2020Observed: 3.12 ft at 6:30PM May 26, 2020Observed: 3.12 ft at 6:45PM May 26, 2020Observed: 3.12 ft at 7:00PM May 26, 2020Observed: 3.12 ft at 7:15PM May 26, 2020Observed: 3.12 ft at 7:30PM May 26, 2020Observed: 3.12 ft at 7:45PM May 26, 2020Observed: 3.12 ft at 8:00PM May 26, 2020Observed: 3.12 ft at 8:15PM May 26, 2020Observed: 3.12 ft at 8:30PM May 26, 2020Observed: 3.12 ft at 8:45PM May 26, 2020Observed: 3.12 ft at 9:00PM May 26, 2020Observed: 3.12 ft at 9:15PM May 26, 2020Observed: 3.12 ft at 9:30PM May 26, 2020Observed: 3.12 ft at 9:45PM May 26, 2020Observed: 3.12 ft at 10:00PM May 26, 2020Observed: 3.12 ft at 10:15PM May 26, 2020Observed: 3.12 ft at 10:30PM May 26, 2020Observed: 3.12 ft at 10:45PM May 26, 2020Observed: 3.11 ft at 11:00PM May 26, 2020Observed: 3.11 ft at 11:15PM May 26, 2020Observed: 3.11 ft at 11:30PM May 26, 2020Observed: 3.11 ft at 11:45PM May 26, 2020Observed: 3.11 ft at 12:00AM May 27, 2020Observed: 3.11 ft at 12:15AM May 27, 2020Observed: 3.11 ft at 12:30AM May 27, 2020Observed: 3.11 ft at 12:45AM May 27, 2020Observed: 3.11 ft at 1:00AM May 27, 2020Observed: 3.11 ft at 1:15AM May 27, 2020Observed: 3.11 ft at 1:30AM May 27, 2020Observed: 3.11 ft at 1:45AM May 27, 2020Observed: 3.11 ft at 2:00AM May 27, 2020Observed: 3.11 ft at 2:15AM May 27, 2020Observed: 3.11 ft at 2:30AM May 27, 2020Observed: 3.1 ft at 2:45AM May 27, 2020Observed: 3.1 ft at 3:00AM May 27, 2020Observed: 3.1 ft at 3:15AM May 27, 2020Observed: 3.1 ft at 3:30AM May 27, 2020Observed: 3.1 ft at 3:45AM May 27, 2020Observed: 3.1 ft at 4:00AM May 27, 2020Observed: 3.1 ft at 4:15AM May 27, 2020Observed: 3.1 ft at 4:30AM May 27, 2020Observed: 3.1 ft at 4:45AM May 27, 2020Observed: 3.1 ft at 5:00AM May 27, 2020Observed: 3.1 ft at 5:15AM May 27, 2020Observed: 3.1 ft at 5:30AM May 27, 2020Observed: 3.09 ft at 5:45AM May 27, 2020Observed: 3.09 ft at 6:00AM May 27, 2020Observed: 3.09 ft at 6:15AM May 27, 2020Observed: 3.09 ft at 6:30AM May 27, 2020Observed: 3.09 ft at 6:45AM May 27, 2020Observed: 3.09 ft at 7:00AM May 27, 2020Observed: 3.09 ft at 7:15AM May 27, 2020Observed: 3.09 ft at 7:30AM May 27, 2020Observed: 3.09 ft at 7:45AM May 27, 2020Observed: 3.09 ft at 8:00AM May 27, 2020Observed: 3.09 ft at 8:15AM May 27, 2020Observed: 3.09 ft at 8:30AM May 27, 2020Observed: 3.09 ft at 8:45AM May 27, 2020Observed: 3.09 ft at 9:00AM May 27, 2020Observed: 3.09 ft at 9:15AM May 27, 2020Observed: 3.09 ft at 9:30AM May 27, 2020Observed: 3.09 ft at 9:45AM May 27, 2020Observed: 3.09 ft at 10:00AM May 27, 2020Observed: 3.09 ft at 10:15AM May 27, 2020Observed: 3.09 ft at 10:30AM May 27, 2020Observed: 3.09 ft at 10:45AM May 27, 2020Observed: 3.09 ft at 11:00AM May 27, 2020Observed: 3.09 ft at 11:15AM May 27, 2020Observed: 3.09 ft at 11:30AM May 27, 2020Observed: 3.09 ft at 11:45AM May 27, 2020Observed: 3.09 ft at 12:00PM May 27, 2020Observed: 3.09 ft at 12:15PM May 27, 2020Observed: 3.09 ft at 12:30PM May 27, 2020Observed: 3.09 ft at 12:45PM May 27, 2020Observed: 3.09 ft at 1:00PM May 27, 2020Observed: 3.09 ft at 1:15PM May 27, 2020Observed: 3.09 ft at 1:30PM May 27, 2020Observed: 3.09 ft at 1:45PM May 27, 2020Observed: 3.09 ft at 2:00PM May 27, 2020Observed: 3.09 ft at 2:15PM May 27, 2020Observed: 3.09 ft at 2:30PM May 27, 2020Observed: 3.09 ft at 2:45PM May 27, 2020Observed: 3.09 ft at 3:00PM May 27, 2020Observed: 3.09 ft at 3:15PM May 27, 2020Observed: 3.09 ft at 3:30PM May 27, 2020Observed: 3.09 ft at 3:45PM May 27, 2020Observed: 3.09 ft at 4:00PM May 27, 2020Observed: 3.09 ft at 4:15PM May 27, 2020Observed: 3.09 ft at 4:30PM May 27, 2020Observed: 3.09 ft at 4:45PM May 27, 2020Observed: 3.09 ft at 5:00PM May 27, 2020Observed: 3.09 ft at 5:15PM May 27, 2020Observed: 3.09 ft at 5:30PM May 27, 2020Observed: 3.09 ft at 5:45PM May 27, 2020Observed: 3.09 ft at 6:00PM May 27, 2020Observed: 3.09 ft at 6:15PM May 27, 2020Observed: 3.09 ft at 6:30PM May 27, 2020Observed: 3.09 ft at 6:45PM May 27, 2020Observed: 3.09 ft at 7:00PM May 27, 2020Observed: 3.09 ft at 7:15PM May 27, 2020Observed: 3.09 ft at 7:30PM May 27, 2020Observed: 3.09 ft at 7:45PM May 27, 2020Observed: 3.09 ft at 8:00PM May 27, 2020Observed: 3.09 ft at 8:15PM May 27, 2020Observed: 3.09 ft at 8:30PM May 27, 2020Observed: 3.09 ft at 8:45PM May 27, 2020Observed: 3.09 ft at 9:00PM May 27, 2020Observed: 3.09 ft at 9:15PM May 27, 2020Observed: 3.09 ft at 9:30PM May 27, 2020Observed: 3.09 ft at 9:45PM May 27, 2020Observed: 3.09 ft at 10:00PM May 27, 2020Observed: 3.09 ft at 10:15PM May 27, 2020Observed: 3.09 ft at 10:30PM May 27, 2020Observed: 3.09 ft at 10:45PM May 27, 2020Observed: 3.09 ft at 11:00PM May 27, 2020Observed: 3.09 ft at 11:15PM May 27, 2020Observed: 3.09 ft at 11:30PM May 27, 2020Observed: 3.09 ft at 11:45PM May 27, 2020Observed: 3.09 ft at 12:00AM May 28, 2020Observed: 3.09 ft at 12:15AM May 28, 2020Observed: 3.09 ft at 12:30AM May 28, 2020Observed: 3.09 ft at 12:45AM May 28, 2020Observed: 3.09 ft at 1:00AM May 28, 2020Observed: 3.09 ft at 1:15AM May 28, 2020Observed: 3.09 ft at 1:30AM May 28, 2020Observed: 3.09 ft at 1:45AM May 28, 2020Observed: 3.09 ft at 2:00AM May 28, 2020Observed: 3.09 ft at 2:15AM May 28, 2020Observed: 3.09 ft at 2:30AM May 28, 2020Observed: 3.09 ft at 2:45AM May 28, 2020Observed: 3.09 ft at 3:00AM May 28, 2020Observed: 3.09 ft at 3:15AM May 28, 2020Observed: 3.09 ft at 3:30AM May 28, 2020Observed: 3.09 ft at 3:45AM May 28, 2020Observed: 3.09 ft at 4:00AM May 28, 2020Observed: 3.09 ft at 4:15AM May 28, 2020Observed: 3.09 ft at 4:30AM May 28, 2020Observed: 3.09 ft at 4:45AM May 28, 2020Observed: 3.09 ft at 5:00AM May 28, 2020Observed: 3.09 ft at 5:15AM May 28, 2020Observed: 3.09 ft at 5:30AM May 28, 2020Observed: 3.09 ft at 5:45AM May 28, 2020Observed: 3.09 ft at 6:00AM May 28, 2020Observed: 3.09 ft at 6:15AM May 28, 2020Observed: 3.09 ft at 6:30AM May 28, 2020Observed: 3.09 ft at 6:45AM May 28, 2020Observed: 3.09 ft at 7:00AM May 28, 2020Observed: 3.09 ft at 7:15AM May 28, 2020Observed: 3.09 ft at 7:30AM May 28, 2020Observed: 3.09 ft at 7:45AM May 28, 2020Observed: 3.09 ft at 8:00AM May 28, 2020Observed: 3.09 ft at 8:15AM May 28, 2020Observed: 3.09 ft at 8:30AM May 28, 2020Observed: 3.09 ft at 8:45AM May 28, 2020Observed: 3.09 ft at 9:00AM May 28, 2020Observed: 3.09 ft at 9:15AM May 28, 2020Observed: 3.09 ft at 9:30AM May 28, 2020Observed: 3.09 ft at 9:45AM May 28, 2020Observed: 3.09 ft at 10:00AM May 28, 2020Observed: 3.09 ft at 10:15AM May 28, 2020Observed: 3.09 ft at 10:30AM May 28, 2020Observed: 3.09 ft at 10:45AM May 28, 2020Observed: 3.09 ft at 11:00AM May 28, 2020Observed: 3.09 ft at 11:15AM May 28, 2020Observed: 3.09 ft at 11:30AM May 28, 2020Observed: 3.09 ft at 11:45AM May 28, 2020Observed: 3.09 ft at 12:00PM May 28, 2020Observed: 3.09 ft at 12:15PM May 28, 2020Observed: 3.09 ft at 12:30PM May 28, 2020Observed: 3.09 ft at 12:45PM May 28, 2020Observed: 3.09 ft at 1:00PM May 28, 2020Observed: 3.09 ft at 1:15PM May 28, 2020Observed: 3.09 ft at 1:30PM May 28, 2020Observed: 3.09 ft at 1:45PM May 28, 2020Observed: 3.09 ft at 2:00PM May 28, 2020Observed: 3.09 ft at 2:15PM May 28, 2020Observed: 3.09 ft at 2:30PM May 28, 2020Observed: 3.1 ft at 2:45PM May 28, 2020Observed: 3.1 ft at 3:00PM May 28, 2020Observed: 3.1 ft at 3:15PM May 28, 2020Observed: 3.1 ft at 3:30PM May 28, 2020Observed: 3.1 ft at 3:45PM May 28, 2020Observed: 3.11 ft at 4:00PM May 28, 2020Observed: 3.11 ft at 4:15PM May 28, 2020Observed: 3.11 ft at 4:30PM May 28, 2020Observed: 3.11 ft at 4:45PM May 28, 2020Observed: 3.11 ft at 5:00PM May 28, 2020Observed: 3.11 ft at 5:15PM May 28, 2020Observed: 3.11 ft at 5:30PM May 28, 2020Observed: 3.11 ft at 5:45PM May 28, 2020Observed: 3.11 ft at 6:00PM May 28, 2020Observed: 3.11 ft at 6:15PM May 28, 2020Observed: 3.11 ft at 6:30PM May 28, 2020Observed: 3.12 ft at 6:45PM May 28, 2020Observed: 3.12 ft at 7:00PM May 28, 2020Observed: 3.12 ft at 7:15PM May 28, 2020Observed: 3.13 ft at 7:30PM May 28, 2020Observed: 3.13 ft at 7:45PM May 28, 2020Observed: 3.13 ft at 8:00PM May 28, 2020Observed: 3.13 ft at 8:15PM May 28, 2020Observed: 3.13 ft at 8:30PM May 28, 2020Observed: 3.13 ft at 8:45PM May 28, 2020Observed: 3.13 ft at 9:00PM May 28, 2020Observed: 3.13 ft at 9:15PM May 28, 2020Observed: 3.13 ft at 9:30PM May 28, 2020Observed: 3.13 ft at 9:45PM May 28, 2020Observed: 3.12 ft at 10:00PM May 28, 2020Observed: 3.12 ft at 10:15PM May 28, 2020Observed: 3.12 ft at 10:30PM May 28, 2020Observed: 3.12 ft at 10:45PM May 28, 2020Observed: 3.13 ft at 11:00PM May 28, 2020Observed: 3.13 ft at 11:15PM May 28, 2020Observed: 3.13 ft at 11:30PM May 28, 2020Observed: 3.13 ft at 11:45PM May 28, 2020Observed: 3.13 ft at 12:00AM May 29, 2020Observed: 3.13 ft at 12:15AM May 29, 2020Observed: 3.13 ft at 12:30AM May 29, 2020Observed: 3.13 ft at 12:45AM May 29, 2020Observed: 3.13 ft at 1:00AM May 29, 2020Observed: 3.13 ft at 1:15AM May 29, 2020Observed: 3.13 ft at 1:30AM May 29, 2020Observed: 3.13 ft at 1:45AM May 29, 2020Observed: 3.13 ft at 2:00AM May 29, 2020Observed: 3.13 ft at 2:15AM May 29, 2020Observed: 3.13 ft at 2:30AM May 29, 2020Observed: 3.13 ft at 2:45AM May 29, 2020Observed: 3.13 ft at 3:00AM May 29, 2020Observed: 3.13 ft at 3:15AM May 29, 2020Observed: 3.13 ft at 3:30AM May 29, 2020Observed: 3.13 ft at 3:45AM May 29, 2020Observed: 3.13 ft at 4:00AM May 29, 2020Observed: 3.13 ft at 4:15AM May 29, 2020Observed: 3.13 ft at 4:30AM May 29, 2020Observed: 3.13 ft at 4:45AM May 29, 2020Observed: 3.13 ft at 5:00AM May 29, 2020Observed: 3.12 ft at 5:15AM May 29, 2020Observed: 3.12 ft at 5:30AM May 29, 2020Observed: 3.12 ft at 5:45AM May 29, 2020Observed: 3.12 ft at 6:00AM May 29, 2020Observed: 3.12 ft at 6:15AM May 29, 2020Observed: 3.12 ft at 6:30AM May 29, 2020Observed: 3.12 ft at 6:45AM May 29, 2020Observed: 3.12 ft at 7:00AM May 29, 2020Observed: 3.12 ft at 7:15AM May 29, 2020Observed: 3.12 ft at 7:30AM May 29, 2020Observed: 3.12 ft at 7:45AM May 29, 2020Observed: 3.12 ft at 8:00AM May 29, 2020Observed: 3.12 ft at 8:15AM May 29, 2020Observed: 3.12 ft at 8:30AM May 29, 2020Observed: 3.12 ft at 8:45AM May 29, 2020Observed: 3.11 ft at 9:00AM May 29, 2020Observed: 3.11 ft at 9:15AM May 29, 2020Observed: 3.11 ft at 9:30AM May 29, 2020Observed: 3.11 ft at 9:45AM May 29, 2020Observed: 3.11 ft at 10:00AM May 29, 2020Observed: 3.11 ft at 10:15AM May 29, 2020Observed: 3.11 ft at 10:30AM May 29, 2020Observed: 3.11 ft at 10:45AM May 29, 2020Observed: 3.11 ft at 11:00AM May 29, 2020Observed: 3.11 ft at 11:15AM May 29, 2020Observed: 3.11 ft at 11:30AM May 29, 2020Observed: 3.11 ft at 11:45AM May 29, 2020Observed: 3.1 ft at 12:00PM May 29, 2020Observed: 3.1 ft at 12:15PM May 29, 2020USGS--Water Resources of the United StatesGFLV2(plotting HGIRG) Graph Created (1:10PM May 29, 2020)ObservedLatest observed value: 3.1 ft at 12:15 PM EDT 29-May-2020. Flood Stage is 11 ft
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About this graph
Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
Metadata
NOTE: Forecasts are not available for the Difficult Run near Great Falls. Only observed stages are available for this point.
Return to Area Map
Flood Categories (in feet)
Major Flood Stage: 20
Moderate Flood Stage: 13
Flood Stage: 11
Action Stage: 9
Low Stage (in feet): -9999

Historic Crests
(1) 21.40 ft on 06/22/1972
(2) 17.54 ft on 09/08/2011
(3) 16.62 ft on 09/06/2008
(4) 15.01 ft on 06/26/2006
(5) 13.82 ft on 09/26/1975
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 12.59 ft on 07/08/2019 (P)
(2) 11.08 ft on 08/01/2018
(3) 12.80 ft on 07/22/2018
(4) 12.23 ft on 05/16/2014
(5) 12.57 ft on 04/30/2014
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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:15
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Gauge LocationGauge Map Marker
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Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
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20 Water approaches structures near the stream.
13 Water reaches the intersection of Leigh Mill Road and Kelso Road.
11 Leigh Mill Road floods near Difficult Run.
About This Location Collapse

Latitude: 38.975833° N, Longitude: 77.246111° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft 11 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)		 Elevation
(gauge height = flood stage)		 Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 Not Available Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:
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The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
(Baltimore/Washington) Sterling Weather Forecast Office
43858 Weather Service Rd.
Sterling, VA 20166
(703) 996-2200
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