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Hydrograph River at a Glance Download
Backlick Run at Van Dorn Street in Alexandria Stage (ft)Observed: 0 ft at 8:05AM Jul 26, 2021Observed: 0.1 ft at 7:45PM Jul 26, 2021Observed: -0.01 ft at 7:50PM Jul 26, 2021Observed: 0.34 ft at 8:05PM Jul 26, 2021Observed: 0.63 ft at 8:10PM Jul 26, 2021Observed: 0.34 ft at 8:15PM Jul 26, 2021Observed: 0.44 ft at 8:30PM Jul 26, 2021Observed: 0.56 ft at 8:35PM Jul 26, 2021Observed: 0.93 ft at 8:40PM Jul 26, 2021Highest Observation: 1.06 ft at 8:45PM Jul 26, 2021Observed: 0.89 ft at 8:50PM Jul 26, 2021Observed: 0.66 ft at 9:10PM Jul 26, 2021Observed: 0.5 ft at 9:15PM Jul 26, 2021Observed: 0.4 ft at 9:20PM Jul 26, 2021Observed: 0.27 ft at 9:30PM Jul 26, 2021Observed: 0.16 ft at 9:35PM Jul 26, 2021Observed: 0.06 ft at 9:40PM Jul 26, 2021Observed: 0 ft at 8:05AM Jul 27, 2021Observed: 0 ft at 8:05PM Jul 27, 2021Observed: 0 ft at 8:05AM Jul 28, 2021Observed: 0 ft at 8:05PM Jul 28, 2021Observed: 0.22 ft at 10:55PM Jul 28, 2021Observed: 0.67 ft at 11:00PM Jul 28, 2021Observed: 0.77 ft at 11:15PM Jul 28, 2021Observed: 0.88 ft at 11:25PM Jul 28, 2021Observed: 1.04 ft at 11:40PM Jul 28, 2021Observed: 0.86 ft at 11:45PM Jul 28, 2021Observed: 0.73 ft at 11:50PM Jul 28, 2021Observed: 0.76 ft at 11:55PM Jul 28, 2021Observed: 0.65 ft at 12:10AM Jul 29, 2021Observed: 0.52 ft at 12:25AM Jul 29, 2021Observed: 0.4 ft at 12:35AM Jul 29, 2021Observed: 0.29 ft at 12:40AM Jul 29, 2021Observed: 0.18 ft at 12:45AM Jul 29, 2021Observed: 0.07 ft at 12:55AM Jul 29, 2021Observed: 0 ft at 8:05AM Jul 29, 2021Observed: 0 ft at 8:05PM Jul 29, 2021Observed: 0 ft at 8:05AM Jul 30, 2021Observed: 0 ft at 8:05PM Jul 30, 2021BLRV2(plotting HGIRR) Graph Created (2:41AM Jul 31, 2021)ObservedLatest observed value: 0 ft at 8:05 PM EDT 30-Jul-2021. Flood Stage is 6 ft
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Tabular Data (UTC)
Tabular Data (EDT)
XML Data
RSS Files
Datum: Not Available
NOTE: Forecasts are not available for the Backlick Run at Van Dorn Street in Alexandria. Only observed stages are available for this point.
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Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 6
Action Stage: 4
Low Stage (in feet): -9999

Historic Crests
Currently none available.

Recent Crests
Currently none available.

Low Water Records
Currently none available.

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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.
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Latitude: 38.803333° N, Longitude: 77.133889° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame
Gauge Height Flood Stage Uses
NWS stage 0 ft 6 ft Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)
(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  
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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.
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(Baltimore/Washington) Sterling Weather Forecast Office
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Sterling, VA 20166
(703) 996-2200
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Page last modified: 2-Nov-2020 7:30 PM
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