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Potomac River at Alexandria
Critical Stages
2.5' - Action
3.3' - Flood
4.2' - Moderate
6.6' - Major
Latest Observation
Updated: 7:54 AM EST 12/6/25
Status: No Flooding
Stage: 1.57 ft
Flow: -999 kcfs
Forecast
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 9 AM 12/6 | 1.7 | -999 |
| 10 AM 12/6 | 1.5 | -999 |
| 11 AM 12/6 | 0.9 | -999 |
| 12 PM 12/6 | 0.2 | -999 |
| 1 PM 12/6 | -0.5 | -999 |
| 2 PM 12/6 | -0.9 | -999 |
| 3 PM 12/6 | -1.2 | -999 |
| 4 PM 12/6 | -1.1 | -999 |
| 5 PM 12/6 | -0.5 | -999 |
| 6 PM 12/6 | 0.5 | -999 |
| 7 PM 12/6 | 1.3 | -999 |
| 8 PM 12/6 | 1.8 | -999 |
| 9 PM 12/6 | 2 | -999 |
| 10 PM 12/6 | 2.1 | -999 |
| 11 PM 12/6 | 1.7 | -999 |
| 12 AM 12/7 | 1 | -999 |
| 1 AM 12/7 | 0.2 | -999 |
| 2 AM 12/7 | -0.3 | -999 |
| 3 AM 12/7 | -0.6 | -999 |
| 4 AM 12/7 | -0.8 | -999 |
| 5 AM 12/7 | -0.8 | -999 |
| 6 AM 12/7 | -0.1 | -999 |
| 7 AM 12/7 | 0.9 | -999 |
| 8 AM 12/7 | 1.5 | -999 |
| 9 AM 12/7 | 1.8 | -999 |
| 10 AM 12/7 | 1.9 | -999 |
| 11 AM 12/7 | 1.5 | -999 |
| 12 PM 12/7 | 0.9 | -999 |
| 1 PM 12/7 | 0.2 | -999 |
| 2 PM 12/7 | -0.4 | -999 |
| 3 PM 12/7 | -0.7 | -999 |
| 4 PM 12/7 | -0.9 | -999 |
| 5 PM 12/7 | -0.9 | -999 |
| 6 PM 12/7 | -0.1 | -999 |
| 7 PM 12/7 | 0.9 | -999 |
| 8 PM 12/7 | 1.5 | -999 |
| 9 PM 12/7 | 1.9 | -999 |
| 10 PM 12/7 | 2.2 | -999 |
| 11 PM 12/7 | 2.2 | -999 |
| 12 AM 12/8 | 1.7 | -999 |
| 1 AM 12/8 | 1 | -999 |
| 2 AM 12/8 | 0.3 | -999 |
| 3 AM 12/8 | -0.2 | -999 |
| 4 AM 12/8 | -0.5 | -999 |
| 5 AM 12/8 | -0.7 | -999 |
| 6 AM 12/8 | -0.6 | -999 |
| 7 AM 12/8 | 0.1 | -999 |
| 8 AM 12/8 | 1 | -999 |
| Time | Stage (ft) | Flow (kcfs) |
|---|---|---|
| 8:12 AM 12/6 | 1.64 | -999 |
| 8:06 AM 12/6 | 1.63 | -999 |
| 8:00 AM 12/6 | 1.61 | -999 |
| 7:54 AM 12/6 | 1.57 | -999 |
| 7:48 AM 12/6 | 1.55 | -999 |
| 7:42 AM 12/6 | 1.52 | -999 |
| 7:36 AM 12/6 | 1.47 | -999 |
| 7:30 AM 12/6 | 1.46 | -999 |
| 7:24 AM 12/6 | 1.41 | -999 |
| 7:18 AM 12/6 | 1.36 | -999 |
| 7:12 AM 12/6 | 1.31 | -999 |
| 7:06 AM 12/6 | 1.26 | -999 |
| 7:00 AM 12/6 | 1.21 | -999 |
| 6:54 AM 12/6 | 1.13 | -999 |
| 6:48 AM 12/6 | 1.08 | -999 |
| 6:42 AM 12/6 | 1.03 | -999 |
| 6:36 AM 12/6 | 0.94 | -999 |
| 6:30 AM 12/6 | 0.89 | -999 |
| 6:24 AM 12/6 | 0.81 | -999 |
| 6:18 AM 12/6 | 0.73 | -999 |
| 6:12 AM 12/6 | 0.65 | -999 |
| 6:06 AM 12/6 | 0.58 | -999 |
| 6:00 AM 12/6 | 0.49 | -999 |
| 5:54 AM 12/6 | 0.4 | -999 |
| 5:48 AM 12/6 | 0.32 | -999 |
| 5:42 AM 12/6 | 0.23 | -999 |
| 5:36 AM 12/6 | 0.15 | -999 |
| 5:30 AM 12/6 | 0.07 | -999 |
| 5:24 AM 12/6 | -0.04 | -999 |
| 5:18 AM 12/6 | -0.12 | -999 |
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.
5.5' -
Floodwaters reach about a block and a half inland at King Street and cover several blocks of Union Street in Alexandria.
5' -
Flooding begins in the vicinity of the Joint Base Anacostia Bolling marina. Access to the Daingerfield Island area is cut off due to flooding. Several parks along the Alexandria waterfront are flooded. Union Street is flooded between Wales Alley and Thompson Alley. Lower portions of King Street, Prince Street, and Strand Street are flooded. Water approaches the southern tip of Lee Street.
4.5' -
Flooding is ongoing at several businesses near the intersection of King Street and Union Street.
4' -
Water approaches buildings near the intersection of King Street and Union Street. This flooding will be slightly more widespread in a tidal flood than a freshwater flood.
3.8' -
Water covers part of Mt. Vernon Trail along the George Washington Memorial Parkway between Belle View Blvd and Tulane Drive.
3.75' -
Union Street is covered by water near King Street. Water starts to cover the driveway leading to Belle Haven Marina.
3.25' -
Water covers the easternmost end of King Street.
3.1' -
Water reaches the curb near the intersection of King Street and Strand Street.
2.7' -
Water begins to pool near the corner of Strand Street and Wales Alley in Alexandria.
| Date | Stage (ft) |
|---|---|
| Sep 19, 2003 | 8.66 |
| Mar 19, 1936 | 7.4 |
| Oct 29, 2021 | 5.99 |
| Apr 16, 2011 | 5.06 |
| Sep 10, 2018 | 5.04 |
| Apr 30, 2014 | 4.92 |
| Mar 14, 2010 | 4.88 |
| Sep 11, 2018 | 4.83 |
| Apr 17, 2011 | 4.76 |
| Sep 9, 2018 | 4.67 |
| Oct 30, 2012 | 4.65 |
| Sep 11, 2018 | 4.63 |
| Mar 14, 2010 | 4.56 |
| Apr 7, 2023 | 4.53 |
| May 1, 2014 | 4.46 |
| Oct 12, 2019 | 4.46 |
| Feb 25, 2016 | 4.46 |
| Sep 24, 2023 | 4.44 |
| Oct 12, 2019 | 4.43 |
| May 16, 2014 | 4.43 |
Data provided by the National Weather Service.
