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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 South Fork South Branch Potomac River near SF Moorefield are issued routinely year-round.
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Zoom Level:14
Flood Categories (in feet)
Major Flood Stage: 14
Moderate Flood Stage: 12
Flood Stage: 10
Action Stage: 8
Low Stage (in feet): -9999

Historic Crests
(1) 19.99 ft on 11/05/1985
(2) 16.10 ft on 06/18/1949
(3) 14.90 ft on 03/17/1936
(4) 13.50 ft on 03/29/1924
(5) 12.27 ft on 09/07/1996
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(P): Preliminary values subject to further review.

Recent Crests
(1) 10.80 ft on 06/03/2018
(2) 10.94 ft on 09/19/2003 (P)
(3) 12.27 ft on 09/07/1996
(4) 10.50 ft on 01/19/1996
(5) 19.99 ft on 11/05/1985
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
(1) 0.40 ft on 08/21/1987
KML Image
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 Near record flooding expected. The entire town on the left bank of the South Fork will be flooded. Water will begin to inundate Washington and Elm, Winchester and North Main, and Ashley and Spring Streets.
16 Narly half of the town will be inundated. Maple Avenue will be flooded north of Jackson to the intersection with Spring Avenue. Kuyendall Lane and Main Street will be under water and a large part of Main Street and adjacent roads will be inundated. Water will be approaching the main floor of the chicken processing plant.
14.5 Water reaches the railroad bridge just south of town.
14 Water will be approaching the northern boundary of the business district.
12 Water will begin to inundate the sewage treatment plant. Water begins to flood Town Run Road and areas from the high school northward begin to flood. On the south end of town, Rohrbaugh Street south of the railroad tracks will begin to flood.
10 Water begins to flood pastureland south of town.
8 The river overflows mainly low lying areas.
(1) Looking Downriver at Gage on Right Bank

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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