Potomac River at Alexandria

Last updated: Jul 25, 2025, 12:42 AM UTC

Flood Impacts 🅘

  • 9 - Flooding is occurring nearshore at Joint Base Anacostia Bolling near the marina and at the Naval Research Lab. Daingerfield Island is completely flooded. Union Street is flooded for almost its entire length in Alexandria. Dozens of structures are impacted. Widespread backwater flooding is affecting Huntington and Belle View.
  • 7.5 - On Joint Base Anacostia Bolling, floodwaters cross Giovanni Way with structures affected. Daingerfield Island is almost totally underwater. In Alexandria, flooding reaches the east end of Madison Street with structures flooded. Union Street is flooded between Queen Street and Duke Street with numerous structures impacted. A large section of the George Washington Parkway is flooded and closed both north and south of Old Town Alexandria.
  • 6.5 - Water approaches the George Washington Parkway near Daingerfield Island and Belle Haven. Flooding is occurring near the Joint Base Anacostia Bolling marina. Significant flooding is occurring along Union Street in Old Town Alexandria, along with nearby streets. Flooding is also occurring further south at Jones Point.

Gauge Info

Coordinates 38.8053, -77.0383
RFC MARFC
State VA
WFO LWX
County City of Alexandria
Data Provider(s)
US Geological Survey USGS--Water Resources of the United States
USGS 0165258890

Gauge Location

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Recent Crests

1. 4.44 ft on 09-24-2023 (P)
2. 4.53 ft on 04-07-2023 (P)
3. 4.27 ft on 01-17-2022 (P)
4. 5.99 ft on 10-29-2021 (P)
5. 3.87 ft on 05-01-2020 (P)

Historic Crests

1. 8.66 ft on 09-19-2003
2. 7.40 ft on 03-19-1936
3. 5.99 ft on 10-29-2021 (P)
4. 5.06 ft on 04-16-2011
5. 5.04 ft on 09-10-2018

Vertical Datum Table

type NAVD88
major Flooding 6.60 ft
moderate Flooding 4.20 ft
minor Flooding 3.30 ft
action 2.50 ft
Latest Value 2.56 ft
Gauge Zero 0.00 ft

Gauge Photos

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Probability Information

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Collaborative Agencies

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.

WFO Information

Weather Forecast Office
(Baltimore/Washington) Sterling
43858 Weather Service Rd.
Sterling, VA 20166
Official Homepage