Potomac River at Harpers Ferry
West Virginia — Water Level & Flood Stage
Located in Jefferson County, West Virginia on the Potomac River. Live water level data from USGS, updated every 15 minutes.
Current Water Level
Gage Height
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Streamflow
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Last Reading
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This is an NWS forecast point (LID: HFEW2). Live data may be limited. View on NWS AHPS →
Flood Stages
Major Flood
24 ft
213,000 cfs
Moderate Flood
21.5 ft
164,000 cfs
Minor Flood
18 ft
122,500 cfs
Action Stage
16 ft
98,000 cfs
Flood stages defined by the National Weather Service. Gage height data from USGS Water Resources.
What Floods at Each Level
43.5 ft
Water approaches the lowest point of Potomac Avenue in Brunswick Maryland.
40 ft
Water reaches the train depot of the MARC and Amtrak station at Harpers Ferry.
33.5 ft
Water reaches the railyard in Brunswick Maryland.
33 ft
Water reaches the second floor of buildings in historic Harpers Ferry along Shenandoah Street.
32 ft
Several private buildings on the lower edge of Harpers Ferry are flooded.
29.5 ft
Floodwaters enter the Storer College exhibit building.
28 ft
All buildings facing Shenandoah Street in historic Harpers Ferry are flooded. Floodwater begins to move up High Street. Potomac Street is flooded beyond Hog Alley and water is approaching private businesses.
25.5 ft
Flood waters reach the general store, and the lowermost portion of the John Brown Story building.
25 ft
Almost all of Shenandoah Street is covered by water. Water reaches the Provost Marshal Office, blacksmith shop, quarters building, and the restrooms on Shenandoah Street. Water also enters the Meriwether Lewis exhibit and White Hall Tavern on Potomac Street, which is covered by water up to Hog Alley.
24.5 ft
Floodwaters reach the Industry Museum in historic Harpers Ferry.
24 ft
Floodwaters reach John Brown Fort, the bookshop, and the A Place in Time Museum in historic Harpers Ferry. Most of Shenandoah Street is flooded and floodwaters cover around half of Arsenal Square. Potomac Street is flooded nearly to White Hall Tavern, but no buildings are impacted on Potomac Street.
23.5 ft
Water approaches John Browns Fort in historic Harpers Ferry. Water surrounds the bookshop and A Place in Time Museum. Water surrounds the blacksmiths shop. Potomac Street begins to flood at the intersection with Shenandoah Street.
22.5 ft
Water begins to approach buildings in historic Harpers Ferry. Most of Shenandoah Street, except between the bookshop and John Browns Fort, is flooded.
21.5 ft
Virtually all of the old federal armory site at historic Harpers Ferry is flooded. Water begins flowing out of the open tunnel between the Potomac and lower town Harpers Ferry, flooding the very end of Shenandoah Street. Backwaters from the Shenandoah River flood even more of Shenandoah Street, including the shuttle bus pavilion.
20.5 ft
Much of the old federal armory site in historic Harpers Ferry is flooded. Backwaters on the Shenandoah flood virtually all areas below the retaining wall and elevated W&P Railroad, and are approaching Shenandoah Street. No buildings are impacted.
19.5 ft
Floodwaters begin to cover the old federal armory site at historic Harpers Ferry. Backwater from the Shenandoah covers most areas between the normal river channel and the elevated Winchester & Potomac Railroad tracks.
18.5 ft
The employee parking lot at historic Harpers Ferry floods.
18 ft
Due to backwater effects on the Shenandoah River, floodwaters cover much of the Hamilton Street area of historic Harpers Ferry, and approach the employee parking lot.
16 ft
Water reaches the C&O Canal towpath on the Maryland side of the river across from Harpers Ferry. The pedestrian bridge crossing between historic Harpers Ferry and the canal will be closed.
Impact statements from the National Weather Service, describing what typically happens at each water level.
7-Day Water Level Chart
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Historic Crests
| Date | Stage | Flow |
|---|---|---|
| Mar 19, 1936 | 36.5 ft | — |
| Mar 19, 1936 | 36.5 ft | — |
| May 31, 1889 | 34.8 ft | — |
| May 31, 1889 | 34.8 ft | — |
| Oct 16, 1942 | 33.8 ft | — |
About This Gauge
NWS LID
HFEW2
River
Potomac River
County
Jefferson, WV
Coordinates
39.3236°N, 77.7289°W
Get Flood Alerts for Potomac River
StormCast monitors this gauge and sends a push notification to your phone when the water level crosses into a new flood category — even at 3 AM.
Frequently Asked Questions
What is the current water level of Potomac River at Harpers Ferry?
The Potomac River at Harpers Ferry gauge is maintained by USGS and reports water levels every 15 minutes. Visit this page to see the latest reading updated live, or download StormCast to get push alerts when levels rise.
What is flood stage for Potomac River at Harpers Ferry?
The NWS-defined flood stage for Potomac River at Harpers Ferry is 18 feet. Action stage begins at 16 feet. Moderate flooding starts at 21.5 feet, and major flooding at 24 feet.
How do I get alerts when Potomac River rises?
Download StormCast free on Google Play, go to River Gauges, and add Potomac River at Harpers Ferry to your watchlist. StormCast will send a push notification to your phone whenever the water level crosses into a new NWS flood category — even when your screen is off.
Where is the Potomac River at Harpers Ferry gauge located?
The gauge is located in Jefferson County, West Virginia at coordinates 39.3236°N, 77.7289°W. Data is provided by the U.S. Geological Survey and the National Weather Service.
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Source & Notes
Data provided by: USGS
- Stage may be affected by ice.