Nw Branch Anacostia River Near Colesville, Md Realtime Data
Until 2026-07-19T17:45:33+00:00 • National Weather Service
Monitoring message only. Please disregard.
NW BRANCH ANACOSTIA RIVER NEAR COLESVILLE, MD
Realtime Data • Report • Conditions
2
Discharge (cfs)
1.3
Gauge Height (ft)
Streamflow discharge was last observed at 2 cfs, and a gauge height of 1.31 feet.
With the
% decrease since yesterday,
the streamflow average over the past 10 days is 5 .
Weather today, Tomorrow,
The NW Branch is the largest tributary to the Anacostia, and its flow is influenced by several small streams and dams in the area. The primary constituents of the NW Branch are urban runoff, agricultural runoff, and treated wastewater. Seasonal trends in flow are driven by precipitation, with the highest flow typically occurring in the spring and summer months. Interestingly, the NW Branch is home to a population of endangered Bridle Shiner fish, which are sensitive to changes in water quality and flow. Monitoring the flow of the NW Branch is critical for understanding the health of the Anacostia River and its tributaries.
July 19, 2026
| Elevation | 271.0 ft |
| Last Updated | |
| Gage height, ft | 1.31 ft |
| Streamflow, ft³/s | 1.61 ft3/s |
| Stream water level elevation above NAVD 1988, in ft | 265.36 ft |
| Percent of Normal | 23% |
| Year Over Year Average | 7 cfs |
| 24hr Flow Prediction | cfs |
| Maximum Recorded | 2,580 cfs |
| Geolocation | 39.07, -77.03 |
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