342  
WHUS41 KBOX 291929  
CFWBOX  
 
COASTAL HAZARD MESSAGE  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
329 PM EDT THU APR 29 2021  
 
MAZ007-015-016-019-022-300800-  
/O.NEW.KBOX.CF.S.0005.210430T0300Z-210430T0800Z/  
EASTERN ESSEX MA-SUFFOLK MA-EASTERN NORFOLK MA-  
EASTERN PLYMOUTH MA-BARNSTABLE MA-  
329 PM EDT THU APR 29 2021  
 
* WHAT...UP TO ONE FOOT OF INUNDATION ABOVE GROUND LEVEL  
EXPECTED IN LOW-LYING AREAS NEAR SHORELINES AND TIDAL  
WATERWAYS (3.9 TO 13.2 FEET MEAN LOWER LOW WATER).  
 
* WHERE...EASTERN MASSACHUSETTS COAST INCLUDING CAPE COD.  
 
* WHEN...WITHIN A FEW HOURS OF THE APPROXIMATE 1 TO 3 AM FRIDAY  
MORNING HIGH TIDE.  
 
* IMPACTS...VERY MINOR COASTAL FLOODING OCCURS ALONG MORRISSEY BOULEVARD  
IN BOSTON. OTHER VULNERABLE SHORE ROADS MAY ALSO EXPERIENCE  
MINOR NUISANCE FLOODING.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
DO NOT DRIVE THROUGH FLOODED ROADWAYS.  
 

 
 

 
 
TIME OF HIGH TOTAL TIDES ARE APPROXIMATE TO THE NEAREST HOUR.  
 
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  
-------- --------- --------- --------- ------- --------  
29/02 PM 8.7/ 9.2 -0.9/-0.4 -0.2/ 0.2 2 NONE  
30/02 AM 10.9/11.4 1.4/ 1.9 0.7/ 1.1 3 MINOR  
30/03 PM 9.1/ 9.6 -0.5/ 0.0 0.5/ 1.0 3 NONE  
01/03 AM 10.2/10.7 0.7/ 1.1 0.2/ 0.8 3 NONE  
01/04 PM 8.4/ 8.9 -1.1/-0.7 0.1/ 0.6 2 NONE  
02/04 AM 9.8/10.3 0.2/ 0.8 0.2/ 0.8 2-3 NONE  
 
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  
-------- --------- --------- --------- ------- --------  
29/02 PM 10.5/11.0 1.0/ 1.5 0.2/ 0.8 2 NONE  
30/02 AM 12.0/12.5 2.5/ 3.0 0.7/ 1.1 3 MINOR  
30/03 PM 10.4/10.9 0.9/ 1.4 0.5/ 1.0 3-4 NONE  
01/03 AM 11.2/11.7 1.7/ 2.2 0.2/ 0.8 3 MINOR  
01/04 PM 9.5/10.0 0.0/ 0.5 0.1/ 0.6 2 NONE  
02/04 AM 10.6/11.1 1.1/ 1.6 0.2/ 0.7 3-4 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  
-------- --------- --------- --------- ------- --------  
29/02 PM 10.9/11.4 1.0/ 1.5 0.2/ 0.8 1 NONE  
30/02 AM 12.5/13.0 2.6/ 3.1 0.8/ 1.3 1 MINOR  
30/03 PM 10.7/11.2 0.8/ 1.3 0.5/ 1.0 2 NONE  
01/03 AM 11.6/12.1 1.7/ 2.2 0.2/ 0.8 2 NONE  
01/04 PM 9.9/10.4 0.0/ 0.5 0.2/ 0.7 1 NONE  
02/04 AM 11.0/11.5 1.1/ 1.6 0.2/ 0.8 1 NONE  
 
BOSTON HARBOR  
MLLW CATEGORIES - MINOR 12.5 FT, MODERATE 14.5 FT, MAJOR 16.0 FT  
MHHW CATEGORIES - MINOR 2.4 FT, MODERATE 4.4 FT, MAJOR 5.9 FT  
 
TOTAL TOTAL DEPARTURE  
DAY/TIME TIDE TIDE FROM NORM WAVES FLOOD  
FT MLLW FT MHHW FT FT IMPACT  
-------- --------- --------- --------- ------- --------  
29/02 PM 11.0/11.5 0.9/ 1.4 0.2/ 0.8 1 NONE  
30/02 AM 12.5/13.0 2.3/ 2.8 0.7/ 1.1 1-2 MINOR  
30/03 PM 10.8/11.3 0.7/ 1.1 0.5/ 1.0 2 NONE  
01/03 AM 11.7/12.2 1.6/ 2.0 0.2/ 0.8 2 NONE  
01/04 PM 10.0/10.5 -0.2/ 0.3 0.2/ 0.7 2 NONE  
02/04 AM 11.0/11.5 0.9/ 1.4 0.2/ 0.7 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  
-------- --------- --------- --------- ------- --------  
29/02 PM 10.4/10.9 0.7/ 1.1 0.2/ 0.8 2 NONE  
30/02 AM 12.2/12.7 2.5/ 3.0 0.8/ 1.3 2-3 MINOR  
30/03 PM 10.4/10.9 0.7/ 1.1 0.6/ 1.1 3-4 NONE  
01/03 AM 11.5/12.0 1.8/ 2.2 0.4/ 0.9 3-4 MINOR  
01/04 PM 9.7/10.2 0.0/ 0.5 0.2/ 0.8 2 NONE  
02/04 AM 11.0/11.5 1.3/ 1.8 0.4/ 0.9 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  
-------- --------- --------- --------- ------- --------  
29/03 PM 4.5/ 5.0 0.0/ 0.5 0.6/ 1.1 1 NONE  
30/03 AM 6.2/ 6.7 1.7/ 2.2 1.2/ 1.7 2-3 NONE  
30/04 PM 4.6/ 5.1 0.1/ 0.6 0.8/ 1.3 3 NONE  
01/04 AM 5.2/ 5.7 0.8/ 1.3 0.4/ 0.9 3 NONE  
01/05 PM 4.0/ 4.5 -0.6/-0.1 0.2/ 0.8 2 NONE  
02/05 AM 5.2/ 5.7 0.7/ 1.1 0.5/ 1.0 2-3 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  
-------- --------- --------- --------- ------- --------  
29/11 PM 6.1/ 6.6 1.7/ 2.2 0.9/ 1.4 1-2 MINOR  
30/12 PM 4.7/ 5.2 0.4/ 0.9 0.7/ 1.1 2-3 NONE  
01/12 AM 5.2/ 5.7 0.8/ 1.3 0.2/ 0.8 3 NONE  
01/12 PM 4.0/ 4.5 -0.3/ 0.2 0.1/ 0.6 1 NONE  
02/01 AM 5.0/ 5.5 0.6/ 1.1 0.5/ 1.0 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  
-------- --------- --------- --------- ------- --------  
29/02 PM 10.9/11.4 0.8/ 1.3 0.2/ 0.8 1 NONE  
30/02 AM 12.7/13.2 2.6/ 3.1 0.9/ 1.4 1-2 MINOR  
30/03 PM 10.9/11.4 0.8/ 1.3 0.7/ 1.1 2-3 NONE  
01/03 AM 11.9/12.4 1.8/ 2.2 0.5/ 1.0 3 NONE  
01/04 PM 10.0/10.5 -0.2/ 0.3 0.2/ 0.7 1 NONE  
02/04 AM 11.3/11.8 1.2/ 1.7 0.4/ 0.9 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  
-------- --------- --------- --------- ------- --------  
29/11 PM 3.9/ 4.4 1.9/ 2.3 0.8/ 1.3 1-2 NONE  
30/12 PM 2.7/ 3.2 0.7/ 1.1 0.2/ 0.8 2-3 NONE  
01/12 AM 2.8/ 3.4 0.9/ 1.4 0.0/ 0.5 3 NONE  
01/01 PM 2.3/ 2.8 0.4/ 0.9 0.1/ 0.6 1 NONE  
02/01 AM 2.7/ 3.2 0.8/ 1.3 0.2/ 0.7 1 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  
-------- --------- --------- --------- ------- --------  
29/02 PM 11.6/12.1 1.1/ 1.6 0.5/ 1.0 1 NONE  
30/02 AM 13.3/13.8 2.7/ 3.2 0.9/ 1.4 1-2 MINOR  
30/03 PM 11.7/12.2 1.2/ 1.7 0.9/ 1.4 2-3 NONE  
01/03 AM 12.7/13.2 2.2/ 2.7 0.6/ 1.1 3 MINOR  
01/04 PM 10.7/11.2 0.2/ 0.7 0.2/ 0.8 1-2 NONE  
02/04 AM 12.0/12.5 1.5/ 2.0 0.5/ 1.0 1-2 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  
-------- --------- --------- --------- ------- --------  
29/03 PM 5.0/ 5.5 -2.7/-2.2 0.1/ 0.6 2 NONE  
30/03 AM 6.7/ 7.2 -1.1/-0.6 0.8/ 1.3 3-4 NONE  
30/04 PM 5.5/ 6.0 -2.2/-1.8 0.8/ 1.3 3 NONE  
01/04 AM 6.2/ 6.8 -1.5/-1.0 0.6/ 1.1 3 NONE  
01/05 PM 4.7/ 5.2 -3.0/-2.5 0.2/ 0.8 2-3 NONE  
02/05 AM 6.0/ 6.5 -1.8/-1.3 0.5/ 1.0 3-4 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  
-------- --------- --------- --------- ------- --------  
29/02 PM 9.8/10.3 -0.6/-0.1 0.4/ 0.9 1-2 NONE  
30/02 AM 11.5/12.0 1.2/ 1.7 0.9/ 1.4 1-2 NONE  
30/03 PM 9.8/10.3 -0.6/-0.1 0.7/ 1.1 2-3 NONE  
01/03 AM 10.8/11.3 0.5/ 1.0 0.5/ 1.0 3 NONE  
01/04 PM 9.0/ 9.5 -1.4/-0.9 0.2/ 0.8 1-2 NONE  
02/04 AM 10.2/10.7 -0.2/ 0.3 0.4/ 0.9 1-2 NONE  
 

 
 

 
 
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