074
WHUS41 KBOX 181813
CFWBOX
COASTAL HAZARD MESSAGE
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
213 PM EDT SAT APR 18 2026
MAZ007-015-016-019-022-024-190715-
/O.NEW.KBOX.CF.S.0003.260419T0300Z-260419T0800Z/
EASTERN ESSEX MA-SUFFOLK MA-EASTERN NORFOLK MA-
EASTERN PLYMOUTH MA-BARNSTABLE MA-NANTUCKET MA-
213 PM EDT SAT APR 18 2026
...COASTAL FLOOD STATEMENT IN EFFECT FROM 11 PM EDT THIS EVENING
THROUGH LATE TONIGHT...
* WHAT...UP TO ONE HALF FOOT OF INUNDATION ABOVE GROUND LEVEL
EXPECTED IN LOW-LYING AREAS NEAR SHORELINES AND TIDAL
WATERWAYS (2.6 TO 12.8 FEET MEAN LOWER LOW WATER).
* WHERE...EASTERN ESSEX MA, SUFFOLK MA, EASTERN NORFOLK MA,
EASTERN PLYMOUTH MA, BARNSTABLE MA AND NANTUCKET MA COUNTIES.
* WHEN...FROM 11 PM EDT THIS EVENING THROUGH LATE TONIGHT.
* IMPACTS...SOME WATER ON LOW LYING ROADS AND PROPERTY.
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 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
-------- --------- --------- --------- ------- --------
18/12 PM 9.8/10.3 0.2/ 0.7 0.5/ 1.0 2-3 NONE
19/01 AM 11.1/11.6 1.5/ 2.0 0.2/ 0.8 3 NONE
19/01 PM 10.0/10.5 0.4/ 0.9 0.6/ 1.1 3-4 NONE
20/02 AM 11.1/11.6 1.5/ 2.0 0.2/ 0.7 3 NONE
20/02 PM 9.4/ 9.9 -0.2/ 0.2 0.1/ 0.6 2 NONE
21/02 AM 10.7/11.2 1.1/ 1.6 0.0/ 0.5 2-3 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
-------- --------- --------- --------- ------- --------
18/01 PM 8.9/ 9.4 -0.7/-0.2 0.2/ 0.8 2 NONE
19/01 AM 10.1/10.6 0.6/ 1.1 0.2/ 0.8 2-3 NONE
19/02 PM 9.0/ 9.5 -0.6/-0.1 0.5/ 1.0 3 NONE
20/02 AM 10.1/10.6 0.6/ 1.1 0.2/ 0.7 2 NONE
20/02 PM 8.3/ 8.8 -1.3/-0.8 0.1/ 0.6 2 NONE
21/03 AM 9.8/10.3 0.2/ 0.8 0.0/ 0.5 2 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
-------- --------- --------- --------- ------- --------
18/12 PM 10.5/11.0 0.2/ 0.7 0.2/ 0.8 1-2 NONE
19/01 AM 12.0/12.5 1.7/ 2.2 0.4/ 0.9 1 NONE
19/01 PM 10.8/11.3 0.5/ 1.0 0.6/ 1.1 1-2 NONE
20/01 AM 11.7/12.2 1.4/ 1.9 0.2/ 0.8 1-2 NONE
20/02 PM 10.2/10.7 -0.2/ 0.3 0.2/ 0.7 1 NONE
21/02 AM 11.5/12.0 1.2/ 1.7 0.2/ 0.7 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
-------- --------- --------- --------- ------- --------
18/12 PM 10.4/10.9 0.5/ 1.0 0.2/ 0.8 1-2 NONE
19/01 AM 11.7/12.2 1.8/ 2.2 0.2/ 0.8 1 NONE
19/01 PM 10.6/11.1 0.7/ 1.1 0.5/ 1.0 1-2 NONE
20/01 AM 11.4/11.9 1.5/ 2.0 0.2/ 0.7 1-2 NONE
20/02 PM 9.8/10.3 -0.2/ 0.3 0.0/ 0.5 1 NONE
21/02 AM 11.1/11.6 1.2/ 1.7 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
-------- --------- --------- --------- ------- --------
18/01 PM 10.0/10.5 0.1/ 0.6 0.2/ 0.7 1-2 NONE
19/01 AM 11.4/11.9 1.5/ 2.0 0.2/ 0.8 2 MINOR
19/01 PM 10.2/10.7 0.2/ 0.8 0.6/ 1.1 2 NONE
20/02 AM 11.4/11.9 1.5/ 2.0 0.2/ 0.7 2 MINOR
20/02 PM 9.8/10.3 -0.2/ 0.3 0.2/ 0.7 2 NONE
21/03 AM 11.2/11.7 1.3/ 1.8 0.1/ 0.6 2 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
-------- --------- --------- --------- ------- --------
18/01 PM 9.9/10.4 0.2/ 0.7 0.2/ 0.8 2 NONE
19/01 AM 11.4/11.9 1.7/ 2.2 0.5/ 1.0 2-3 MINOR
19/01 PM 10.2/10.7 0.5/ 1.0 0.7/ 1.1 3 NONE
20/02 AM 11.3/11.8 1.6/ 2.0 0.2/ 0.8 3 MINOR
20/02 PM 9.6/10.1 -0.2/ 0.3 0.2/ 0.7 2 NONE
21/02 AM 11.0/11.5 1.3/ 1.8 0.2/ 0.7 2 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
-------- --------- --------- --------- ------- --------
18/10 PM 2.7/ 3.2 0.7/ 1.1 0.0/ 0.5 1-2 NONE
19/10 AM 2.0/ 2.5 0.0/ 0.5 0.2/ 0.8 1-3 NONE
19/10 PM 2.2/ 2.7 0.2/ 0.8 -0.2/ 0.2 2 NONE
20/10 AM 1.5/ 2.0 -0.6/-0.1 0.2/ 0.7 2 NONE
20/11 PM 1.9/ 2.3 -0.2/ 0.3 -0.6/-0.1 1-2 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
-------- --------- --------- --------- ------- --------
18/01 PM 5.6/ 6.1 0.4/ 0.9 0.4/ 0.9 2-3 NONE
19/01 AM 6.6/ 7.1 1.4/ 1.9 0.2/ 0.8 3 NONE
19/02 PM 5.7/ 6.2 0.5/ 1.0 0.5/ 1.0 3-4 NONE
20/02 AM 6.7/ 7.2 1.5/ 2.0 0.2/ 0.8 3 NONE
20/03 PM 5.1/ 5.6 -0.2/ 0.3 0.1/ 0.6 2 NONE
21/03 AM 6.4/ 6.9 1.2/ 1.7 0.1/ 0.6 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
-------- --------- --------- --------- ------- --------
18/02 PM 4.0/ 4.5 -0.6/-0.1 0.2/ 0.7 2 NONE
19/02 AM 5.2/ 5.7 0.8/ 1.3 0.5/ 1.0 2 NONE
19/02 PM 4.4/ 4.9 -0.2/ 0.3 0.7/ 1.1 3 NONE
20/02 AM 5.2/ 5.7 0.8/ 1.3 0.4/ 0.9 2-3 NONE
20/04 PM 3.9/ 4.4 -0.7/-0.2 0.2/ 0.7 2 NONE
21/03 AM 5.0/ 5.5 0.5/ 1.0 0.1/ 0.6 2 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
-------- --------- --------- --------- ------- --------
18/02 PM 3.4/ 3.9 -0.5/ 0.0 0.2/ 0.7 1 NONE
19/02 AM 4.2/ 4.7 0.5/ 1.0 0.1/ 0.6 1 NONE
19/02 PM 3.7/ 4.2 -0.2/ 0.3 0.6/ 1.1 2-3 NONE
20/03 AM 4.4/ 4.9 0.6/ 1.1 0.1/ 0.6 2 NONE
20/04 PM 3.1/ 3.6 -0.8/-0.2 0.0/ 0.5 1 NONE
21/03 AM 4.0/ 4.5 0.2/ 0.8 -0.2/ 0.3 1-2 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
-------- --------- --------- --------- ------- --------
18/01 PM 10.5/11.0 0.4/ 0.9 0.2/ 0.7 2 NONE
19/01 AM 11.9/12.4 1.8/ 2.2 0.4/ 0.9 2-3 NONE
19/01 PM 10.7/11.2 0.6/ 1.1 0.7/ 1.1 3 NONE
20/02 AM 11.7/12.2 1.6/ 2.0 0.2/ 0.8 3 NONE
20/02 PM 10.0/10.5 -0.2/ 0.3 0.2/ 0.7 2 NONE
21/02 AM 11.2/11.7 1.1/ 1.6 0.2/ 0.8 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
-------- --------- --------- --------- ------- --------
18/01 PM 11.1/11.6 0.6/ 1.1 0.4/ 0.9 1-2 NONE
19/01 AM 12.6/13.1 2.1/ 2.6 0.6/ 1.1 2 NONE
19/01 PM 11.3/11.8 0.8/ 1.3 0.8/ 1.3 2-3 NONE
20/02 AM 12.6/13.1 2.1/ 2.6 0.5/ 1.0 2 NONE
20/02 PM 10.9/11.4 0.4/ 0.9 0.4/ 0.9 1 NONE
21/03 AM 12.3/12.8 1.8/ 2.2 0.4/ 0.9 1-2 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
-------- --------- --------- --------- ------- --------
18/01 PM 8.9/ 9.4 -1.5/-1.0 0.0/ 0.5 1-2 NONE
19/01 AM 10.7/11.2 0.4/ 0.9 0.6/ 1.1 1 NONE
19/01 PM 9.6/10.1 -0.8/-0.2 0.8/ 1.3 2 NONE
20/02 AM 10.5/11.0 0.2/ 0.7 0.4/ 0.9 1-2 NONE
20/02 PM 9.1/ 9.6 -1.3/-0.8 0.4/ 0.9 1 NONE
21/02 AM 10.3/10.8 0.0/ 0.5 0.4/ 0.9 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
-------- --------- --------- --------- ------- --------
18/10 PM 4.6/ 5.1 0.2/ 0.7 -0.6/-0.1 1 NONE
19/10 AM 3.9/ 4.4 -0.6/-0.1 -0.2/ 0.3 1-2 NONE
19/11 PM 4.0/ 4.5 -0.3/ 0.2 -0.9/-0.4 1-2 NONE
20/10 AM 3.5/ 4.0 -1.0/-0.5 0.1/ 0.6 1 NONE
20/11 PM 3.6/ 4.1 -0.9/-0.4 -1.0/-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
-------- --------- --------- --------- ------- --------
18/01 PM 3.2/ 3.7 -0.3/ 0.2 0.4/ 0.9 3 NONE
19/02 AM 4.2/ 4.7 0.7/ 1.1 0.2/ 0.8 2 NONE
19/02 PM 3.4/ 3.9 -0.2/ 0.2 0.5/ 1.0 3-4 NONE
20/03 AM 4.2/ 4.7 0.7/ 1.1 0.2/ 0.8 3 NONE
20/04 PM 2.8/ 3.4 -0.8/-0.2 0.1/ 0.6 2 NONE
21/04 AM 4.0/ 4.5 0.5/ 1.0 0.1/ 0.6 2-3 NONE
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