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Marine Coastal Hazard Message - Issued When Needed
Check the date
Expires:202602241100;Remove:202602241100;150125
WHUS41 KBOX 240208
CFWBOX
Coastal Hazard Message
National Weather Service Boston/Norton MA
908 PM EST Mon Feb 23 2026
MAZ007-015-016-019-022>024-241100-
/O.NEW.KBOX.CF.Y.0004.260224T0700Z-260224T1100Z/
Eastern Essex MA-Suffolk MA-Eastern Norfolk MA-
Eastern Plymouth MA-Barnstable MA-Dukes MA-Nantucket MA-
908 PM EST Mon Feb 23 2026
...COASTAL FLOOD ADVISORY IN EFFECT FROM 2 AM TO 6 AM EST
TUESDAY...
* WHAT...Shallow flooding less than one foot deep around the time
of high tide early Tuesday morning.
* WHERE...Eastern Massachusetts coast including Cape Cod and the
Islands.
* WHEN...From 2 AM to 6 AM EST Tuesday.
* IMPACTS...Flooding of vulnerable lots, parks, and roads with
only isolated road closures expected.
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.
Gloucester Harbor
MLLW Categories - Minor 11.5 ft, Moderate 13.0 ft, Major 15.0 ft
MHHW Categories - Minor 1.9 ft, Moderate 3.4 ft, Major 5.4 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
24/04 AM 10.1/10.6 0.5/ 1.0 0.4/ 0.9 9 None
24/05 PM 7.5/ 8.0 -2.2/-1.7 -0.6/-0.1 4-5 None
25/05 AM 9.7/10.2 0.1/ 0.6 0.1/ 0.6 2 None
25/06 PM 7.8/ 8.3 -1.9/-1.4 0.0/ 0.5 3 None
26/06 AM 9.3/ 9.8 -0.3/ 0.2 -0.2/ 0.2 2 None
26/07 PM 7.7/ 8.2 -2.0/-1.5 -0.2/ 0.3 2 None
Merrimack River near Newburyport MA
MLLW Categories - Minor 11.0 ft, Moderate 12.0 ft, Major 13.5 ft
MHHW Categories - Minor 1.5 ft, Moderate 2.5 ft, Major 4.0 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
24/04 AM 9.2/ 9.7 -0.3/ 0.2 0.4/ 0.9 6-7 None
24/05 PM 6.9/ 7.4 -2.7/-2.2 -0.6/-0.1 3 None
25/05 AM 8.8/ 9.3 -0.8/-0.2 0.1/ 0.6 2 None
25/06 PM 7.1/ 7.6 -2.5/-2.0 0.0/ 0.5 2 None
26/06 AM 8.4/ 8.9 -1.1/-0.7 -0.2/ 0.2 2 None
26/07 PM 7.0/ 7.5 -2.6/-2.1 -0.2/ 0.3 1 None
Boston Harbor
MLLW Categories - Minor 12.5 ft, Moderate 14.0 ft, Major 15.0 ft
MHHW Categories - Minor 2.2 ft, Moderate 3.7 ft, Major 4.7 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
24/04 AM 10.5/11.0 0.2/ 0.7 0.2/ 0.8 2 None
24/04 PM 8.1/ 8.6 -2.2/-1.8 -0.5/ 0.0 1-2 None
25/05 AM 10.2/10.7 -0.2/ 0.3 0.2/ 0.7 1 None
25/06 PM 8.4/ 8.9 -2.0/-1.5 0.1/ 0.6 2 None
26/06 AM 9.7/10.2 -0.7/-0.2 -0.2/ 0.3 1-2 None
26/07 PM 8.2/ 8.7 -2.2/-1.7 0.0/ 0.5 1 None
Revere
MLLW Categories - Minor 12.5 ft, Moderate 14.5 ft, Major 16.0 ft
MHHW Categories - Minor 2.6 ft, Moderate 4.6 ft, Major 6.1 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
24/04 AM 10.2/10.7 0.2/ 0.8 0.2/ 0.7 2 None
24/05 PM 7.8/ 8.4 -2.0/-1.6 -0.5/ 0.0 1-2 None
25/05 AM 9.9/10.4 0.0/ 0.5 0.2/ 0.7 1 None
25/05 PM 8.0/ 8.5 -2.0/-1.5 0.2/ 0.7 1-2 None
26/06 AM 9.4/ 9.9 -0.6/-0.1 -0.2/ 0.3 1-2 None
26/07 PM 8.0/ 8.5 -2.0/-1.5 0.0/ 0.5 1 None
Green Harbor
MLLW Categories - Minor 11.5 ft, Moderate 13.5 ft, Major 15.5 ft
MHHW Categories - Minor 1.6 ft, Moderate 3.6 ft, Major 5.6 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
24/04 AM 10.7/11.2 0.8/ 1.3 0.7/ 1.1 8-10 None
24/05 PM 8.0/ 8.5 -2.0/-1.5 -0.5/ 0.0 3-4 None
25/05 AM 10.1/10.6 0.2/ 0.7 0.2/ 0.7 2 None
25/06 PM 8.4/ 8.9 -1.6/-1.1 0.2/ 0.7 2 None
26/06 AM 9.7/10.2 -0.2/ 0.2 -0.2/ 0.3 1-2 None
26/07 PM 8.2/ 8.7 -1.8/-1.3 0.0/ 0.5 1 None
Scituate MA
MLLW Categories - Minor 11.5 ft, Moderate 13.5 ft, Major 15.5 ft
MHHW Categories - Minor 1.8 ft, Moderate 3.8 ft, Major 5.8 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
24/04 AM 10.5/11.0 0.8/ 1.3 0.5/ 1.0 9-12 None
24/05 PM 8.0/ 8.5 -1.8/-1.3 -0.5/ 0.0 4-5 None
25/05 AM 9.9/10.4 0.2/ 0.7 0.0/ 0.5 2 None
25/06 PM 8.2/ 8.7 -1.6/-1.1 0.0/ 0.5 2 None
26/06 AM 9.6/10.1 -0.2/ 0.3 -0.2/ 0.2 2 None
26/07 PM 8.1/ 8.6 -1.7/-1.2 -0.2/ 0.3 1 None
Buzzards Bay at Woods Hole
MLLW Categories - Minor 5.5 ft, Moderate 7.0 ft, Major 8.5 ft
MHHW Categories - Minor 3.5 ft, Moderate 5.0 ft, Major 6.5 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
24/01 AM 3.2/ 3.7 1.3/ 1.8 1.4/ 1.9 3-4 None
24/01 PM 1.0/ 1.5 -1.1/-0.6 -0.2/ 0.2 2 None
25/02 AM 1.5/ 2.0 -0.6/-0.1 -0.5/ 0.0 2 None
25/03 PM 1.4/ 1.9 -0.7/-0.2 0.2/ 0.7 3-4 None
26/03 AM 1.7/ 2.2 -0.3/ 0.2 -0.2/ 0.2 3-4 None
26/04 PM 1.1/ 1.6 -1.0/-0.5 -0.2/ 0.3 3 None
Chatham MA - East Coast
MLLW Categories - Minor 9.0 ft, Moderate 11.5 ft, Major 13.0 ft
MHHW Categories - Minor 3.8 ft, Moderate 6.3 ft, Major 7.8 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
24/04 AM 6.1/ 6.6 0.9/ 1.4 0.6/ 1.1 9-11 None
24/05 PM 3.9/ 4.4 -1.4/-0.9 -0.5/ 0.0 4-5 None
25/06 AM 5.4/ 5.9 0.2/ 0.7 0.0/ 0.5 2-3 None
25/06 PM 4.0/ 4.5 -1.1/-0.7 0.0/ 0.5 3 None
26/07 AM 5.2/ 5.7 0.0/ 0.5 -0.2/ 0.2 3 None
Chatham - South side
MLLW Categories - Minor 9.0 ft, Moderate 10.5 ft, Major 11.5 ft
MHHW Categories - Minor 4.5 ft, Moderate 6.0 ft, Major 7.0 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
24/05 AM 5.2/ 5.7 0.7/ 1.1 0.6/ 1.1 8-9 None
24/06 PM 3.0/ 3.5 -1.6/-1.1 -0.5/ 0.0 3-4 None
25/06 AM 4.7/ 5.2 0.2/ 0.7 0.1/ 0.6 2 None
25/07 PM 3.2/ 3.7 -1.3/-0.8 0.0/ 0.5 3 None
26/07 AM 4.4/ 4.9 -0.2/ 0.3 -0.2/ 0.2 2-3 None
Hyannis Harbor
MLLW Categories - Minor 5.0 ft, Moderate 6.5 ft, Major 8.5 ft
MHHW Categories - Minor 1.2 ft, Moderate 2.7 ft, Major 4.7 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
24/04 AM 4.6/ 5.1 0.8/ 1.3 1.0/ 1.5 4-5 None
24/06 PM 2.5/ 3.0 -1.4/-0.9 -0.2/ 0.2 2 None
25/06 AM 4.2/ 4.7 0.4/ 0.9 0.2/ 0.8 1-2 None
25/07 PM 2.7/ 3.2 -1.1/-0.6 0.2/ 0.7 2 None
26/07 AM 3.7/ 4.2 0.0/ 0.5 -0.2/ 0.3 2 None
Provincetown Harbor
MLLW Categories - Minor 13.0 ft, Moderate 14.0 ft, Major 15.0 ft
MHHW Categories - Minor 2.9 ft, Moderate 3.9 ft, Major 4.9 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
24/04 AM 10.8/11.3 0.7/ 1.1 0.6/ 1.1 10-12 None
24/05 PM 8.2/ 8.7 -2.0/-1.5 -0.5/ 0.0 4-5 None
25/05 AM 10.2/10.7 0.1/ 0.6 0.2/ 0.7 2-3 None
25/06 PM 8.4/ 8.9 -1.8/-1.3 0.1/ 0.6 2-3 None
26/06 AM 9.7/10.2 -0.5/ 0.0 -0.2/ 0.3 2 None
26/07 PM 8.3/ 8.8 -1.9/-1.4 0.0/ 0.5 2 None
Dennis - Sesuit Harbor
MLLW Categories - Minor 13.0 ft, Moderate 14.5 ft, Major 16.0 ft
MHHW Categories - Minor 2.5 ft, Moderate 4.0 ft, Major 5.5 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
24/04 AM 11.6/12.1 1.1/ 1.6 0.8/ 1.3 6-8 None
24/05 PM 8.8/ 9.3 -1.8/-1.3 -0.3/ 0.2 3 None
25/05 AM 10.8/11.3 0.2/ 0.8 0.2/ 0.7 2 None
25/06 PM 9.0/ 9.5 -1.6/-1.1 0.1/ 0.6 2 None
26/06 AM 10.5/11.0 0.0/ 0.5 0.0/ 0.5 2 None
26/07 PM 8.9/ 9.4 -1.7/-1.2 0.0/ 0.5 1 None
Sandwich Harbor
MLLW Categories - Minor 12.0 ft, Moderate 14.0 ft, Major 15.0 ft
MHHW Categories - Minor 1.7 ft, Moderate 3.7 ft, Major 4.7 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
24/04 AM 10.3/10.8 0.0/ 0.5 1.2/ 1.7 6-7 None
24/05 PM 7.7/ 8.2 -2.7/-2.2 0.2/ 0.7 3 None
25/05 AM 9.5/10.0 -0.9/-0.4 0.5/ 1.0 1-2 None
25/06 PM 7.8/ 8.3 -2.6/-2.1 0.5/ 1.0 2 None
26/06 AM 9.2/ 9.7 -1.1/-0.7 0.2/ 0.8 1-2 None
26/07 PM 7.8/ 8.3 -2.6/-2.1 0.4/ 0.9 1 None
Wings Neck
MLLW Categories - Minor 6.5 ft, Moderate 9.0 ft, Major 11.5 ft
MHHW Categories - Minor 2.1 ft, Moderate 4.6 ft, Major 7.1 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
24/02 AM 5.2/ 5.7 0.9/ 1.4 1.4/ 1.9 3 None
24/02 PM 2.7/ 3.2 -1.7/-1.2 -0.5/ 0.0 2 None
25/03 AM 3.2/ 3.7 -1.1/-0.7 -0.5/ 0.0 1 None
25/03 PM 3.0/ 3.5 -1.5/-1.0 -0.2/ 0.3 2-3 None
26/04 AM 3.5/ 4.0 -1.0/-0.5 -0.2/ 0.2 1-2 None
26/04 PM 2.6/ 3.1 -1.9/-1.4 -0.7/-0.2 1 None
Edgartown
MLLW Categories - Minor 4.0 ft, Moderate 5.0 ft, Major 7.0 ft
MHHW Categories - Minor 1.3 ft, Moderate 2.3 ft, Major 4.3 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
24/02 AM 3.7/ 4.2 1.1/ 1.6 1.3/ 1.8 4-5 Minor
24/06 PM 1.4/ 1.9 -1.4/-0.9 -0.5/ 0.0 3 None
25/06 AM 2.8/ 3.4 0.2/ 0.7 0.1/ 0.6 2 None
25/06 PM 1.8/ 2.2 -1.0/-0.5 0.1/ 0.6 4 None
26/07 AM 2.7/ 3.2 0.0/ 0.5 -0.2/ 0.2 4 None
Vineyard Haven
MLLW Categories - Minor 4.5 ft, Moderate 6.0 ft, Major 7.0 ft
MHHW Categories - Minor 2.5 ft, Moderate 4.0 ft, Major 5.0 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
24/04 AM 2.8/ 3.4 0.9/ 1.4 1.2/ 1.7 3 None
24/05 PM 0.9/ 1.4 -1.1/-0.7 -0.3/ 0.2 2 None
25/06 AM 1.9/ 2.3 -0.2/ 0.3 0.2/ 0.7 2 None
25/06 PM 1.4/ 1.9 -0.7/-0.2 0.2/ 0.7 3-4 None
26/07 AM 1.6/ 2.0 -0.5/ 0.0 -0.2/ 0.2 3 None
26/07 PM 1.3/ 1.8 -0.8/-0.2 0.0/ 0.5 2 None
Nantucket Harbor
MLLW Categories - Minor 5.0 ft, Moderate 6.5 ft, Major 8.0 ft
MHHW Categories - Minor 1.4 ft, Moderate 2.9 ft, Major 4.4 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
24/04 AM 4.4/ 4.9 0.8/ 1.3 1.0/ 1.5 7-8 None
24/05 PM 2.0/ 2.5 -1.7/-1.2 -0.5/ 0.0 4-5 None
25/06 AM 3.7/ 4.2 0.1/ 0.6 0.0/ 0.5 3 None
25/07 PM 2.3/ 2.8 -1.3/-0.8 -0.2/ 0.3 4-5 None
26/07 AM 3.2/ 3.7 -0.3/ 0.2 -0.5/ 0.0 4 None
&&
$$
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