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Marine Coastal Hazard Message - Issued When Needed
Check the date
Expires:202504290800;Remove:202504290800;635632
WHUS41 KBOX 290236
CFWBOX
Coastal Hazard Message
National Weather Service Boston/Norton MA
1036 PM EDT Mon Apr 28 2025
MAZ007-015-016-019-022>024-290800-
/O.NEW.KBOX.CF.S.0003.250429T0236Z-250429T0800Z/
Eastern Essex MA-Suffolk MA-Eastern Norfolk MA-
Eastern Plymouth MA-Barnstable MA-Dukes MA-Nantucket MA-
1036 PM EDT Mon Apr 28 2025
...COASTAL FLOOD STATEMENT IN EFFECT UNTIL 4 AM EDT TUESDAY...
* WHAT...One to two feet of inundation above ground level in low-
lying areas near shorelines and tidal waterways (3.1 to 13.1
feet Mean Lower Low Water).
* WHERE...Eastern Essex MA, Suffolk MA, Eastern Norfolk MA,
Eastern Plymouth MA, Barnstable MA, Dukes MA and Nantucket MA
Counties.
* WHEN...Until 4 AM EDT Tuesday.
* IMPACTS...Roads remain passable. Shallow pockets of very minor
flooding less than one foot deep affect more vulnerable
coastal roads along the North Shore from Salem and Gloucester to
Newburyport. Rough surf will likely cause some splashover onto
coastal roads around the time of high tide.
* ADDITIONAL DETAILS...Very high astronomical tides very early
this morning will result in pockets of splashover and perhaps
very minor coastal flooding. However...no significant impacts
are expected.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Do not drive through flooded roadways.
&&
&&
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 2.0 ft, Moderate 3.5 ft, Major 5.5 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/01 AM 11.6/12.1 2.1/ 2.6 0.2/ 0.7 2 Minor
29/01 PM 10.4/10.9 0.9/ 1.4 0.4/ 0.9 2 None
30/01 AM 11.1/11.6 1.6/ 2.0 -0.2/ 0.2 3-4 None
30/02 PM 9.5/10.0 0.0/ 0.5 -0.2/ 0.2 2 None
01/02 AM 10.9/11.4 1.4/ 1.9 0.0/ 0.5 1-2 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
-------- --------- --------- --------- ------- --------
29/01 AM 10.4/10.9 0.9/ 1.4 0.2/ 0.7 2 None
29/01 PM 9.1/ 9.6 -0.5/ 0.0 0.4/ 0.9 2 None
30/02 AM 10.0/10.5 0.5/ 1.0 -0.2/ 0.2 3 None
30/02 PM 8.3/ 8.8 -1.3/-0.8 -0.2/ 0.2 2 None
01/03 AM 10.0/10.5 0.5/ 1.0 0.0/ 0.5 1 None
Boston Harbor
MLLW Categories - Minor 12.5 ft, Moderate 14.0 ft, Major 15.0 ft
MHHW Categories - Minor 2.4 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
-------- --------- --------- --------- ------- --------
29/01 AM 12.1/12.6 2.0/ 2.5 0.2/ 0.7 1 None
29/01 PM 10.7/11.2 0.6/ 1.1 0.2/ 0.8 1-2 None
30/01 AM 11.5/12.0 1.4/ 1.9 -0.2/ 0.2 2 None
30/02 PM 9.9/10.4 -0.2/ 0.2 -0.2/ 0.2 2 None
01/02 AM 11.4/11.9 1.3/ 1.8 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
-------- --------- --------- --------- ------- --------
29/01 AM 12.1/12.6 2.2/ 2.7 0.2/ 0.7 1 None
29/01 PM 10.7/11.2 0.8/ 1.3 0.2/ 0.8 2 None
30/01 AM 11.6/12.1 1.7/ 2.2 -0.2/ 0.2 2 None
30/02 PM 9.9/10.4 0.0/ 0.5 -0.2/ 0.2 2 None
01/02 AM 11.4/11.9 1.5/ 2.0 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
-------- --------- --------- --------- ------- --------
29/01 AM 11.6/12.1 1.9/ 2.3 0.2/ 0.7 1 Minor
29/01 PM 10.2/10.7 0.5/ 1.0 0.2/ 0.8 1-2 None
30/01 AM 11.2/11.7 1.5/ 2.0 -0.2/ 0.2 3 None
30/02 PM 9.5/10.0 -0.2/ 0.2 -0.2/ 0.2 2 None
01/02 AM 11.2/11.7 1.5/ 2.0 0.0/ 0.5 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
-------- --------- --------- --------- ------- --------
28/09 PM 3.5/ 4.0 1.5/ 2.0 0.4/ 0.9 1 None
29/10 AM 2.7/ 3.2 0.7/ 1.1 0.2/ 0.7 1-2 None
29/10 PM 3.2/ 3.7 1.3/ 1.8 0.2/ 0.7 3-4 None
30/11 AM 2.0/ 2.5 0.0/ 0.5 -0.5/ 0.0 2-3 None
30/11 PM 2.8/ 3.4 0.9/ 1.4 0.0/ 0.5 1-2 None
01/12 PM 2.7/ 3.2 0.7/ 1.1 0.4/ 0.9 1 None
Chatham MA - East Coast
MLLW Categories - Minor 9.0 ft, Moderate 11.5 ft, Major 13.0 ft
MHHW Categories - Minor 1.3 ft, Moderate 3.8 ft, Major 5.3 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/01 AM 6.4/ 6.9 -1.4/-0.9 0.2/ 0.7 2 None
29/02 PM 5.2/ 5.7 -2.6/-2.1 0.2/ 0.7 2-3 None
30/02 AM 5.7/ 6.2 -2.0/-1.5 -0.5/ 0.0 5 None
30/03 PM 4.7/ 5.2 -3.1/-2.6 -0.2/ 0.2 2-3 None
01/03 AM 6.0/ 6.5 -1.8/-1.3 0.0/ 0.5 2 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
-------- --------- --------- --------- ------- --------
29/01 AM 5.2/ 5.7 0.7/ 1.1 0.2/ 0.7 2 None
29/02 PM 4.2/ 4.7 -0.3/ 0.2 0.4/ 0.9 2-3 None
30/02 AM 4.7/ 5.2 0.2/ 0.8 -0.2/ 0.2 4 None
30/03 PM 3.5/ 4.0 -1.1/-0.6 -0.2/ 0.2 2 None
01/03 AM 4.9/ 5.4 0.4/ 0.9 0.0/ 0.5 1 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
-------- --------- --------- --------- ------- --------
29/01 AM 12.2/12.7 2.1/ 2.6 0.2/ 0.7 1-2 None
29/01 PM 10.7/11.2 0.6/ 1.1 0.2/ 0.7 2-3 None
30/01 AM 11.6/12.1 1.5/ 2.0 -0.2/ 0.2 4 None
30/02 PM 9.9/10.4 -0.2/ 0.2 -0.2/ 0.2 2 None
01/02 AM 11.5/12.0 1.4/ 1.9 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
-------- --------- --------- --------- ------- --------
29/01 AM 12.7/13.2 2.2/ 2.7 0.2/ 0.7 1 None
29/01 PM 11.2/11.7 0.7/ 1.1 0.2/ 0.7 1-2 None
30/01 AM 12.2/12.7 1.7/ 2.2 -0.2/ 0.2 3-4 None
30/02 PM 10.5/11.0 0.0/ 0.5 -0.2/ 0.2 1-2 None
01/02 AM 12.1/12.6 1.6/ 2.0 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
-------- --------- --------- --------- ------- --------
29/01 AM 10.9/11.4 0.6/ 1.1 0.2/ 0.7 1 None
29/01 PM 9.5/10.0 -0.9/-0.4 0.2/ 0.7 1-2 None
30/01 AM 10.2/10.7 -0.2/ 0.3 -0.5/ 0.0 3-4 None
30/02 PM 8.8/ 9.3 -1.6/-1.1 -0.2/ 0.2 2-3 None
01/02 AM 10.4/10.9 0.1/ 0.6 0.0/ 0.5 1-2 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
-------- --------- --------- --------- ------- --------
28/09 PM 5.9/ 6.4 1.5/ 2.0 0.4/ 0.9 1 None
29/10 AM 4.7/ 5.2 0.2/ 0.8 0.2/ 0.8 1-2 None
29/10 PM 5.9/ 6.4 1.5/ 2.0 0.6/ 1.1 2-3 None
30/10 AM 3.6/ 4.1 -0.9/-0.4 -0.5/ 0.0 3 None
30/11 PM 4.9/ 5.4 0.5/ 1.0 0.0/ 0.5 1 None
01/12 PM 4.4/ 4.9 0.0/ 0.5 0.4/ 0.9 1 None
Edgartown
MLLW Categories - Minor 4.0 ft, Moderate 5.0 ft, Major 7.0 ft
MHHW Categories - Minor 3.2 ft, Moderate 4.2 ft, Major 6.2 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
29/12 AM 3.0/ 3.5 2.2/ 2.7 0.2/ 0.8 1 None
29/02 PM 2.1/ 2.6 1.3/ 1.8 0.2/ 0.7 2-3 None
30/02 AM 2.6/ 3.1 1.8/ 2.2 -0.2/ 0.2 4 None
30/03 PM 1.7/ 2.2 0.9/ 1.4 -0.2/ 0.2 2 None
01/03 AM 2.7/ 3.2 2.0/ 2.5 0.0/ 0.5 1 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
-------- --------- --------- --------- ------- --------
29/01 AM 2.3/ 2.8 0.4/ 0.9 0.2/ 0.7 1 None
29/01 PM 2.1/ 2.6 0.1/ 0.6 0.4/ 0.9 1-2 None
30/02 AM 1.9/ 2.3 -0.2/ 0.3 -0.2/ 0.2 4 None
30/02 PM 1.5/ 2.0 -0.6/-0.1 -0.2/ 0.2 2 None
01/03 AM 2.0/ 2.5 0.0/ 0.5 0.0/ 0.5 1 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
-------- --------- --------- --------- ------- --------
29/01 AM 4.0/ 4.5 0.5/ 1.0 0.2/ 0.7 2 None
29/02 PM 3.2/ 3.7 -0.3/ 0.2 0.2/ 0.8 2-3 None
30/02 AM 3.7/ 4.2 0.2/ 0.7 -0.2/ 0.2 5 None
30/03 PM 2.7/ 3.2 -0.9/-0.4 -0.2/ 0.3 2-3 None
01/03 AM 3.9/ 4.4 0.2/ 0.8 0.0/ 0.5 2 None
&&
$$
Frank
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