Coastal Flood Warnings/Watches/Statements
Issued by NWS Sterling, VA
Issued by NWS Sterling, VA
261
WHUS41 KLWX 231339
CFWLWX
Coastal Hazard Message
National Weather Service Baltimore MD/Washington DC
939 AM EDT Sat Aug 23 2025
MDZ014-232145-
/O.CON.KLWX.CF.W.0004.000000T0000Z-250824T1400Z/
Anne Arundel-
939 AM EDT Sat Aug 23 2025
...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL 10 AM EDT
SUNDAY...
* WHAT...One and a half to two feet of inundation above ground
level in low lying areas due to tidal flooding.
* WHERE...Shoreline in Anne Arundel County.
* WHEN...Until 10 AM EDT Sunday, especially around the time of
high tide.
* IMPACTS...At 3.5 feet, water reaches the floor of the Maritime
Museum in Annapolis, begins to cover Bowyer Road on the Naval
Academy campus, and numerous businesses on Dock Street are
flooded, along with the City Dock parking lot. Bayside Beach
begins to flood around Harbor Rd and Lake Dr.
* ADDITIONAL DETAILS...Tides one and a half to two feet above
normal. The next high tide at Annapolis U.S. Naval Academy is at
6:14 PM and 6:46 AM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take the necessary actions to protect flood-prone property. If
travel is required, do not drive around barricades or through
water of unknown depth.
&&
Time of high total tides are approximate to the nearest hour.
Severn River at Annapolis
MLLW Categories - Minor 2.6 ft, Moderate 3.3 ft, Major 5.0 ft
MHHW Categories - Minor 1.2 ft, Moderate 1.9 ft, Major 3.6 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
23/06 PM 3.2 1.8 1.8 1.0 Minor
24/06 AM 3.5 2.1 1.9 1.0 Moderate
24/06 PM 2.9 1.5 1.5 1.0 Minor
25/06 AM 2.9 1.5 1.4 0.5 Minor
25/07 PM 2.6 1.2 1.1 0.5 Minor
26/07 AM 2.4 1.0 0.9 0.5 None
&&
$$
MDZ011-018-508-232145-
/O.CON.KLWX.CF.Y.0033.000000T0000Z-250825T1000Z/
Southern Baltimore-Calvert-Southeast Harford-
939 AM EDT Sat Aug 23 2025
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT
MONDAY...
* WHAT...One and a half to three feet of inundation above ground
level in low lying areas due to tidal flooding.
* WHERE...Southern Baltimore, Calvert and Southeast Harford
Counties.
* WHEN...Until 6 AM EDT Monday, especially around the time of
high tide.
* IMPACTS...At 3.5 feet, flooding is occurring at the end of
Thames Street in Baltimore. Water covers the promenade in the
Inner Harbor in multiple locations. At 3.0 feet, water begins
encroaching upon yards in the Bowleys Quarters area. At 4.5
feet, portions of the Havre de Grace Yacht Basin are flooded,
along with Hutchins Park. At 3.0 feet, water is expected to
reach backyards near 9th Street in North Beach, and could
approach 9th Street. At 3.5 feet, yards are flooded near
Charles Street and Williams Street in Solomons. Nearby parking
lots and the streets themselves are covered by more than a
half foot of water.
* ADDITIONAL DETAILS...Tides two and a half to three feet above
normal. The next high tide at Fort McHenry Baltimore is at 7:40
PM and 8:11 AM. The next high tide at Havre de Grace is at 10:26
AM and 11:02 PM. The next high tide at Solomons Island is at
3:04 PM and 3:36 AM. The next high tide at Chesapeake Beach is
at 4:53 PM and 5:24 AM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.
&&
Time of high total tides are approximate to the nearest hour.
NW Branch Patapsco River at Baltimore MD
MLLW Categories - Minor 3.4 ft, Moderate 4.6 ft, Major 6.0 ft
MHHW Categories - Minor 1.7 ft, Moderate 2.9 ft, Major 4.3 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
23/07 PM 3.4 1.7 1.8 0.5 Minor
24/08 AM 3.6 1.9 1.7 0.5 Minor
24/08 PM 3.2 1.5 1.5 0.5 None
25/08 AM 3.1 1.4 1.4 0.5 None
25/09 PM 2.8 1.1 1.0 0.5 None
Chesapeake Bay at Bowleys Quarters
MLLW Categories - Minor 3.0 ft, Moderate 3.8 ft, Major 5.0 ft
MHHW Categories - Minor 1.3 ft, Moderate 2.1 ft, Major 3.3 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
23/09 PM 3.1 1.4 1.5 1.0 Minor
24/08 AM 3.2 1.5 1.3 1.0 Minor
24/08 PM 2.8 1.1 1.1 1.0 None
25/08 AM 2.6 0.9 0.9 0.5 None
25/09 PM 2.3 0.6 0.5 1.0 None
Chesapeake Bay at North Beach
MLLW Categories - Minor 3.0 ft, Moderate 4.0 ft, Major 5.0 ft
MHHW Categories - Minor 1.6 ft, Moderate 2.6 ft, Major 3.6 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
23/05 PM 2.9 1.5 1.4 1.0 None
24/06 AM 3.1 1.7 1.4 1.0 Minor
24/07 PM 2.7 1.3 1.1 1.0 None
25/07 AM 2.7 1.3 1.0 0.5 None
25/07 PM 2.3 0.9 0.7 0.5 None
26/07 AM 2.1 0.7 0.5 0.5 None
Patuxent River at Solomons Island
MLLW Categories - Minor 3.0 ft, Moderate 4.0 ft, Major 5.0 ft
MHHW Categories - Minor 1.5 ft, Moderate 2.5 ft, Major 3.5 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
23/03 PM 3.4 1.9 1.8 1.0 Minor
24/03 AM 3.5 2.0 1.8 1.0 Minor
24/04 PM 3.1 1.6 1.5 1.0 Minor
25/04 AM 3.1 1.6 1.4 1.0 Minor
25/04 PM 2.7 1.2 1.1 1.0 None
26/04 AM 2.6 1.1 1.0 1.0 None
Chesapeake Bay at Havre de Grace MD
MLLW Categories - Minor 4.0 ft, Moderate 5.5 ft, Major 7.0 ft
MHHW Categories - Minor 2.2 ft, Moderate 3.7 ft, Major 5.2 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
23/10 AM 5.2 2.8 2.7 1.0 Minor
23/11 PM 4.6 2.2 2.0 1.0 Minor
24/11 AM 4.8 2.4 2.3 1.0 Minor
25/12 AM 4.4 2.0 1.8 1.0 Minor
25/11 AM 4.2 1.8 2.0 1.0 Minor
26/12 AM 4.0 1.6 1.4 1.0 Minor
&&
$$
MDZ016-VAZ057-232145-
/O.CON.KLWX.CF.Y.0033.000000T0000Z-250824T2300Z/
Charles-King George-
939 AM EDT Sat Aug 23 2025
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 7 PM EDT
SUNDAY...
* WHAT...Around two feet of inundation above ground level in low
lying areas due to tidal flooding.
* WHERE...Shoreline in Charles and King George Counties.
* WHEN...Until 7 PM EDT Sunday, especially around the time of
high tide.
* IMPACTS...At 3.5 feet, water reaches yards near Cobb Island
and docks near Dahlgren.
* ADDITIONAL DETAILS...Tides one and a half to two feet above
normal. The next high tide at Goose Bay is at 5:04 PM and 5:19
AM. The next high tide at Dahlgren is at 3:58 PM and 4:18 AM.
The next high tide at Indian Head is at 8:58 PM and 9:13 AM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.
&&
Time of high total tides are approximate to the nearest hour.
Upper Machodoc Creek at Dahlgren
MLLW Categories - Minor 3.5 ft, Moderate 5.0 ft, Major 7.0 ft
MHHW Categories - Minor 1.6 ft, Moderate 3.1 ft, Major 5.1 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
23/04 PM 3.9 2.0 1.8 1.0 Minor
24/04 AM 3.9 2.0 1.7 1.0 Minor
24/04 PM 3.7 1.8 1.7 1.0 Minor
25/04 AM 3.6 1.7 1.6 0.5 Minor
25/05 PM 3.3 1.4 1.2 0.5 None
26/05 AM 3.1 1.2 1.1 0.5 None
&&
$$
VAZ054-232145-
/O.CON.KLWX.CF.Y.0033.000000T0000Z-250824T2300Z/
Arlington/Falls Church/Alexandria-
939 AM EDT Sat Aug 23 2025
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 7 PM EDT
SUNDAY...
* WHAT...One and a half to two feet of inundation above ground
level in low lying areas due to tidal flooding.
* WHERE...Shoreline in the City of Alexandria and Arlington
County.
* WHEN...Until 7 PM EDT Sunday, especially around the time of
high tide.
* IMPACTS...Water is expected to approach the curb near the
intersection of King Street and Strand Street in Alexandria..
* ADDITIONAL DETAILS...Tides one and a half to two feet above
normal. The next high tide at Alexandria is at 9:30 PM and 9:45
AM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.
&&
$$
MDZ017-232145-
/O.CON.KLWX.CF.Y.0033.000000T0000Z-250825T0000Z/
St. Marys-
939 AM EDT Sat Aug 23 2025
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT
SUNDAY...
* WHAT...Around two feet of inundation above ground level in low
lying areas due to tidal flooding.
* WHERE...Shoreline in St. Marys County.
* WHEN...Until 8 PM EDT Sunday, especially around the time of
high tide.
* IMPACTS...At 3.5 feet, water covers roads on Saint George
Island, is in yards, and is approaching structures. To the
east, inundation is occurring at multiple marinas off St.
Mary`s River, Smith Creek, and Jutland Creek.
* ADDITIONAL DETAILS...Tides one and a half to two feet above
normal. The next high tide at Coltons Point is at 3:54 PM and
4:09 AM. The next high tide at Piney Point is at 3:18 PM and
3:33 AM. The next high tide at Point Lookout is at 2:12 PM and
2:43 AM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.
&&
Time of high total tides are approximate to the nearest hour.
St Marys River at Straits Point
MLLW Categories - Minor 3.0 ft, Moderate 3.5 ft, Major 5.0 ft
MHHW Categories - Minor 1.4 ft, Moderate 1.9 ft, Major 3.4 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
23/02 PM 3.4 1.8 1.9 1.0 None
24/03 AM 3.5 1.9 1.9 1.0 Minor
24/03 PM 3.3 1.7 1.8 1.0 None
25/03 AM 3.2 1.6 1.7 1.0 None
25/04 PM 2.9 1.3 1.4 1.0 None
26/05 AM 2.7 1.1 1.1 0.5 None
&&
$$
DCZ001-231500-
/O.CON.KLWX.CF.Y.0033.000000T0000Z-250823T1500Z/
District of Columbia-
939 AM EDT Sat Aug 23 2025
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 11 AM EDT THIS
MORNING...
* WHAT...One and half to two feet of inundation above ground
level in low lying areas due to tidal flooding.
* WHERE...Shoreline in the District of Columbia.
* WHEN...Until 11 AM EDT this morning, especially around the
time of high tide.
* IMPACTS...Low lying areas near Fletchers Boathouse begin to
flood. Portions of Roosevelt Island are flooded..
* ADDITIONAL DETAILS...Tides one and a half to two feet above
normal. The next high tide at Washington Channel is at 9:12 PM
and 9:27 AM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.
&&
$$