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This probabilistic forecast is issued by the Middle Atlantic River Forecast Center.
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About this graph
Forecasts for the North Branch Potomac River at Luke are issued routinely year-round.
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Downstream Gauge Downstream Gauge - at Cumberland
Zoom Level:14
Flood Categories (in feet)
Major Flood Stage: 15
Moderate Flood Stage: 12.5
Flood Stage: 10.5
Action Stage: 9
Low Stage (in feet): -9999

Historic Crests
(1) 17.15 ft on 10/15/1954
(2) 17.00 ft on 03/25/1924
(3) 16.76 ft on 03/17/1936
(4) 15.53 ft on 08/17/1955
(5) 14.87 ft on 07/03/1978
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 9.49 ft on 05/11/2003
(2) 10.26 ft on 09/07/1996
(3) 9.83 ft on 04/01/1993
(4) 9.76 ft on 05/06/1988
(5) 9.72 ft on 04/05/1984
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
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Gauge LocationGauge Map Marker
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
20 Water overtops the railroad bridges at the old paper mill.
17 Levees protect the old paper mill at Luke up to approximately this level. If water reaches the top of the levee, water may affect structures.
16 Water reaches the railroad tracks in the town of Westernport.
15 Significant flooding is occurring in Westernport and Piedmont, with buildings and roads flooded.
13.5 Maryland Route 135 begins to flood west of the town of Luke. Water also reaches the underside of railroad bridges near the old paper mill.
12.5 Backwater from the Potomac begins to flood the town of Westernport. Portions of Maryland Route 135 east of downtown may be affected, and water will approach Westernport Elementary School. This flooding will be more severe if Georges Creek is also in flood.
12 Floodwaters begin to affect portions of Piedmont, West Virginia.
10.5 If water levels are elevated on Georges Creek, a combination of the creek and backwater from the Potomac will begin to flood the town of Westernport. Portions of Maryland Route 135 may be affected, and water will approach Westernport Elementary School.
7 Water begins to flow over the dam near the old paper mill in Luke. No flooding is occurring.

Other Real-time and/or Archive Data Sources:

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.

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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Page last modified: 2-Nov-2020 7:30 PM
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