124  
WHUS41 KBOX 230210  
CFWBOX  
 
COASTAL HAZARD MESSAGE  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
1010 PM EDT FRI AUG 22 2025  
 
MAZ020-RIZ006-007-231515-  
/O.EXP.KBOX.CF.Y.0004.000000T0000Z-250823T0200Z/  
/O.CON.KBOX.SU.Y.0001.000000T0000Z-250824T0000Z/  
SOUTHERN BRISTOL MA-WASHINGTON RI-NEWPORT RI-  
1010 PM EDT FRI AUG 22 2025  
   
..HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY  
   
..COASTAL FLOOD ADVISORY HAS EXPIRED  
 
* WHAT...LARGE BREAKING WAVES OF 4 TO 8 FEET IN THE SURF ZONE.  
 
* WHERE...IN MASSACHUSETTS, SOUTHERN BRISTOL MA COUNTY. IN RHODE  
ISLAND, WASHINGTON RI AND NEWPORT RI COUNTIES.  
 
* WHEN...UNTIL 8 PM EDT SATURDAY.  
 
* IMPACTS...DANGEROUS SWIMMING AND SURFING CONDITIONS AND  
LOCALIZED BEACH EROSION.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
INEXPERIENCED SWIMMERS SHOULD REMAIN OUT OF THE WATER DUE TO  
DANGEROUS SURF CONDITIONS.  
 
 
 
 
 
RIZ008-231515-  
/O.EXP.KBOX.CF.Y.0004.000000T0000Z-250823T0200Z/  
/O.CON.KBOX.SU.Y.0001.000000T0000Z-250824T0000Z/  
BLOCK ISLAND RI-  
1010 PM EDT FRI AUG 22 2025  
   
..HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY  
   
..COASTAL FLOOD ADVISORY HAS EXPIRED  
 
* WHAT...LARGE BREAKING WAVES OF 5 TO 8 FEET IN THE SURF ZONE.  
 
* WHERE...BLOCK ISLAND RI.  
 
* WHEN...UNTIL 8 PM EDT SATURDAY.  
 
* IMPACTS...DANGEROUS SWIMMING AND SURFING CONDITIONS AND  
LOCALIZED BEACH EROSION.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
INEXPERIENCED SWIMMERS SHOULD REMAIN OUT OF THE WATER DUE TO  
DANGEROUS SURF CONDITIONS.  
 
 
 
 
 
RIZ002-004-005-230315-  
/O.EXP.KBOX.CF.Y.0004.000000T0000Z-250823T0200Z/  
SOUTHEAST PROVIDENCE RI-EASTERN KENT RI-BRISTOL RI-  
1010 PM EDT FRI AUG 22 2025  
   
..COASTAL FLOOD ADVISORY HAS EXPIRED  
 
WATER LEVELS HAVE FALLEN BELOW FLOOD STAGE AND ARE EXPECTED  
TO REMAIN BELOW FLOOD LEVELS.  
 
 
 
MAZ023-024-231515-  
/O.CON.KBOX.CF.Y.0004.000000T0000Z-250823T0600Z/  
/O.CON.KBOX.SU.Y.0001.000000T0000Z-250824T0000Z/  
DUKES MA-NANTUCKET MA-  
1010 PM EDT FRI AUG 22 2025  
 
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL 2 AM EDT  
SATURDAY...   
..HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY  
 
* WHAT...FOR THE HIGH SURF ADVISORY, LARGE BREAKING WAVES OF 5  
TO 12 FEET IN THE SURF ZONE. FOR THE COASTAL FLOOD ADVISORY,  
UP TO ONE HALF FOOT OF INUNDATION ABOVE GROUND LEVEL EXPECTED  
IN LOW- LYING AREAS NEAR SHORELINES AND TIDAL WATERWAYS (3.6  
TO 5.3 FEET MEAN LOWER LOW WATER).  
 
* WHERE...DUKES AND NANTUCKET MA COUNTIES.  
 
* WHEN...FOR THE COASTAL FLOOD ADVISORY, UNTIL 2 AM EDT  
SATURDAY. FOR THE HIGH SURF ADVISORY, UNTIL 8 PM EDT SATURDAY.  
 
* IMPACTS...ROADS REMAIN PASSABLE. LOW LYING AREAS AND ROADS  
NEAR NANTUCKET HARBOR, INCLUDING EASY STREET, MAY EXPERIENCE  
POCKETS OF SHALLOW FLOODING LESS THAN ONE FOOT DEEP. DANGEROUS  
SWIMMING AND SURFING CONDITIONS AND LOCALIZED BEACH EROSION.  
 
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.  
 
INEXPERIENCED SWIMMERS SHOULD REMAIN OUT OF THE WATER DUE TO  
DANGEROUS SURF CONDITIONS.  
 
 
 
 
 
TIME OF HIGH TOTAL TIDES ARE APPROXIMATE TO THE NEAREST HOUR.  
 
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  
-------- --------- --------- --------- ------- --------  
23/12 AM 4.0/ 4.5 1.3/ 1.8 1.3/ 1.8 3 MINOR  
23/01 PM 2.8/ 3.4 0.2/ 0.7 0.8/ 1.3 3 NONE  
24/01 AM 3.1/ 3.6 0.4/ 0.9 0.5/ 1.0 3 NONE  
24/01 PM 2.5/ 3.0 -0.2/ 0.2 0.4/ 0.9 2-3 NONE  
25/01 AM 2.7/ 3.2 0.1/ 0.6 0.5/ 1.0 2 NONE  
25/02 PM 2.6/ 3.1 -0.2/ 0.3 0.4/ 0.9 2 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  
-------- --------- --------- --------- ------- --------  
23/12 AM 3.4/ 3.9 1.4/ 1.9 1.3/ 1.8 2 NONE  
23/12 PM 2.7/ 3.2 0.7/ 1.1 0.9/ 1.4 2 NONE  
23/11 PM 2.5/ 3.0 0.5/ 1.0 0.8/ 1.3 2 NONE  
24/01 PM 2.3/ 2.8 0.4/ 0.9 0.5/ 1.0 2 NONE  
25/01 AM 2.3/ 2.8 0.4/ 0.9 0.5/ 1.0 2 NONE  
25/01 PM 2.3/ 2.8 0.4/ 0.9 0.6/ 1.1 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  
-------- --------- --------- --------- ------- --------  
23/12 AM 5.1/ 5.6 1.5/ 2.0 1.3/ 1.8 5-6 MINOR  
23/01 PM 3.9/ 4.4 0.2/ 0.8 0.8/ 1.3 5 NONE  
24/02 AM 4.2/ 4.7 0.6/ 1.1 0.5/ 1.0 4 NONE  
24/02 PM 3.6/ 4.1 0.0/ 0.5 0.4/ 0.9 3-4 NONE  
25/02 AM 3.9/ 4.4 0.2/ 0.8 0.4/ 0.9 3 NONE  
25/02 PM 3.7/ 4.2 0.1/ 0.6 0.4/ 0.9 3 NONE  
 
 
 
 
 
MAZ022-231515-  
/O.CON.KBOX.SU.Y.0001.000000T0000Z-250824T0000Z/  
/O.CON.KBOX.CF.S.0004.000000T0000Z-250823T0600Z/  
BARNSTABLE MA-  
1010 PM EDT FRI AUG 22 2025  
   
..HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY  
 
...COASTAL FLOOD STATEMENT REMAINS IN EFFECT UNTIL 2 AM EDT  
SATURDAY...  
 
* WHAT...FOR THE HIGH SURF ADVISORY, LARGE BREAKING WAVES OF 6  
TO 13 FEET IN THE SURF ZONE. FOR THE COASTAL FLOOD STATEMENT,  
UP TO ONE HALF FOOT OF INUNDATION ABOVE GROUND LEVEL IN LOW-  
LYING AREAS NEAR SHORELINES AND TIDAL WATERWAYS (4.2 TO 12.2  
FEET MEAN LOWER LOW WATER).  
 
* WHERE...CAPE COD.  
 
* WHEN...FOR THE HIGH SURF ADVISORY, UNTIL 8 PM EDT SATURDAY.  
FOR THE COASTAL FLOOD STATEMENT, UNTIL 2 AM EDT SATURDAY.  
 
* IMPACTS...SOME WATER ON LOW LYING ROADS AND PROPERTY.  
DANGEROUS SWIMMING AND SURFING CONDITIONS AND LOCALIZED BEACH  
EROSION.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
DO NOT DRIVE THROUGH FLOODED ROADWAYS.  
 
INEXPERIENCED SWIMMERS SHOULD REMAIN OUT OF THE WATER DUE TO  
DANGEROUS SURF CONDITIONS.  
 
 
 
 
 
TIME OF HIGH TOTAL TIDES ARE APPROXIMATE TO THE NEAREST HOUR.  
 
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  
-------- --------- --------- --------- ------- --------  
23/08 AM 3.0/ 3.5 1.0/ 1.5 1.0/ 1.5 2 NONE  
23/09 PM 2.8/ 3.4 0.9/ 1.4 0.5/ 1.0 2 NONE  
24/09 AM 2.6/ 3.1 0.6/ 1.1 0.4/ 0.9 2 NONE  
24/10 PM 2.7/ 3.2 0.7/ 1.1 0.4/ 0.9 2 NONE  
25/10 AM 2.7/ 3.2 0.7/ 1.1 0.4/ 0.9 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  
-------- --------- --------- --------- ------- --------  
22/11 PM 6.2/ 6.8 1.1/ 1.6 1.3/ 1.8 6-7 NONE  
23/01 PM 5.7/ 6.2 0.5/ 1.0 0.7/ 1.1 5-6 NONE  
24/12 AM 5.5/ 6.0 0.2/ 0.8 0.5/ 1.0 4 NONE  
24/01 PM 5.5/ 6.0 0.2/ 0.8 0.5/ 1.0 4 NONE  
25/01 AM 5.5/ 6.0 0.2/ 0.8 0.5/ 1.0 3 NONE  
25/02 PM 5.4/ 5.9 0.2/ 0.7 0.4/ 0.9 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  
-------- --------- --------- --------- ------- --------  
23/01 AM 6.0/ 6.5 1.5/ 2.0 1.3/ 1.8 5 NONE  
23/01 PM 4.7/ 5.2 0.2/ 0.7 0.9/ 1.4 4-5 NONE  
24/01 AM 4.7/ 5.2 0.2/ 0.8 0.2/ 0.8 3-4 NONE  
24/02 PM 4.7/ 5.2 0.2/ 0.7 0.8/ 1.3 3 NONE  
25/02 AM 5.1/ 5.6 0.6/ 1.1 0.8/ 1.3 3 NONE  
25/02 PM 4.2/ 4.7 -0.2/ 0.2 0.4/ 0.9 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  
-------- --------- --------- --------- ------- --------  
23/12 AM 11.7/12.2 1.6/ 2.0 1.3/ 1.8 5 NONE  
23/12 PM 10.2/10.7 0.1/ 0.6 0.8/ 1.3 4 NONE  
24/12 AM 10.9/11.4 0.8/ 1.3 0.6/ 1.1 4 NONE  
24/01 PM 10.3/10.8 0.2/ 0.7 0.7/ 1.1 3 NONE  
25/01 AM 10.9/11.4 0.8/ 1.3 0.7/ 1.1 2-3 NONE  
25/01 PM 10.1/10.6 0.0/ 0.5 0.7/ 1.1 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  
-------- --------- --------- --------- ------- --------  
23/12 AM 12.2/12.7 1.7/ 2.2 1.3/ 1.8 3 NONE  
23/12 PM 10.8/11.3 0.2/ 0.8 0.9/ 1.4 3 NONE  
24/12 AM 11.4/11.9 0.9/ 1.4 0.7/ 1.1 2 NONE  
24/01 PM 11.3/11.8 0.8/ 1.3 1.2/ 1.7 2-3 NONE  
25/01 AM 11.8/12.3 1.3/ 1.8 1.2/ 1.7 2 NONE  
25/01 PM 10.7/11.2 0.2/ 0.7 0.8/ 1.3 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  
-------- --------- --------- --------- ------- --------  
22/11 PM 10.6/11.1 0.2/ 0.8 1.4/ 1.9 2 NONE  
23/12 PM 9.1/ 9.6 -1.3/-0.8 0.8/ 1.3 1-3 NONE  
24/12 AM 9.7/10.2 -0.7/-0.2 0.6/ 1.1 2 NONE  
24/01 PM 9.7/10.2 -0.7/-0.2 1.2/ 1.7 2-3 NONE  
25/01 AM 10.2/10.7 -0.2/ 0.3 1.2/ 1.7 2 NONE  
25/01 PM 9.2/ 9.7 -1.1/-0.7 0.8/ 1.3 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  
-------- --------- --------- --------- ------- --------  
22/09 PM 6.0/ 6.5 1.6/ 2.0 1.6/ 2.0 1 MINOR  
23/09 AM 5.2/ 5.7 0.9/ 1.4 1.1/ 1.6 1-2 NONE  
23/09 PM 5.1/ 5.6 0.7/ 1.1 0.7/ 1.1 2 NONE  
24/10 AM 4.7/ 5.2 0.2/ 0.8 0.4/ 0.9 2-3 NONE  
24/10 PM 4.7/ 5.2 0.2/ 0.8 0.4/ 0.9 2 NONE  
25/10 AM 4.7/ 5.2 0.2/ 0.8 0.5/ 1.0 2 NONE  
 
 
 
 
 
MAZ007-019-231515-  
/O.CON.KBOX.SU.Y.0001.000000T0000Z-250824T0000Z/  
/O.CON.KBOX.CF.S.0004.000000T0000Z-250823T0600Z/  
EASTERN ESSEX MA-EASTERN PLYMOUTH MA-  
1010 PM EDT FRI AUG 22 2025  
   
..HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY  
 
...COASTAL FLOOD STATEMENT REMAINS IN EFFECT UNTIL 2 AM EDT  
SATURDAY...  
 
* WHAT...FOR THE HIGH SURF ADVISORY, LARGE BREAKING WAVES OF 5  
TO 10 FEET IN THE SURF ZONE. FOR THE COASTAL FLOOD STATEMENT,  
UP TO ONE HALF FOOT OF INUNDATION ABOVE GROUND LEVEL IN LOW-  
LYING AREAS NEAR SHORELINES AND TIDAL WATERWAYS (10.5 TO 11.6  
FEET MEAN LOWER LOW WATER).  
 
* WHERE...EASTERN ESSEX AND EASTERN PLYMOUTH MA COUNTIES.  
 
* WHEN...FOR THE HIGH SURF ADVISORY, UNTIL 8 PM EDT SATURDAY.  
FOR THE COASTAL FLOOD STATEMENT, UNTIL 2 AM EDT SATURDAY.  
 
* IMPACTS...ROADS REMAIN PASSABLE. SHALLOW POCKETS OF 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. DANGEROUS SWIMMING  
AND SURFING CONDITIONS AND LOCALIZED BEACH EROSION.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
DO NOT DRIVE THROUGH FLOODED ROADWAYS.  
 
INEXPERIENCED SWIMMERS SHOULD REMAIN OUT OF THE WATER DUE TO  
DANGEROUS SURF CONDITIONS.  
 
 
 
 
 
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  
-------- --------- --------- --------- ------- --------  
23/12 AM 11.4/11.9 1.8/ 2.2 1.3/ 1.8 6-7 MINOR  
23/12 PM 9.9/10.4 0.2/ 0.8 0.9/ 1.4 6 NONE  
24/12 AM 10.4/10.9 0.8/ 1.3 0.5/ 1.0 5-6 NONE  
24/01 PM 9.7/10.2 0.1/ 0.6 0.6/ 1.1 4 NONE  
25/01 AM 10.3/10.8 0.7/ 1.1 0.6/ 1.1 3-4 NONE  
25/01 PM 9.5/10.0 -0.2/ 0.3 0.5/ 1.0 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  
-------- --------- --------- --------- ------- --------  
23/12 AM 10.3/10.8 0.8/ 1.3 1.3/ 1.8 5 NONE  
23/12 PM 8.9/ 9.4 -0.7/-0.2 0.9/ 1.4 4 NONE  
24/12 AM 9.2/ 9.7 -0.3/ 0.2 0.5/ 1.0 4 NONE  
24/01 PM 8.8/ 9.3 -0.8/-0.2 0.6/ 1.1 3 NONE  
25/01 AM 9.3/ 9.8 -0.2/ 0.2 0.6/ 1.1 2-3 NONE  
25/02 PM 8.6/ 9.1 -1.0/-0.5 0.4/ 0.9 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  
-------- --------- --------- --------- ------- --------  
23/12 AM 11.4/11.9 1.7/ 2.2 1.3/ 1.8 5 MINOR  
23/12 PM 9.9/10.4 0.2/ 0.7 0.8/ 1.3 5 NONE  
24/12 AM 10.5/11.0 0.8/ 1.3 0.6/ 1.1 4 NONE  
24/01 PM 10.1/10.6 0.4/ 0.9 0.9/ 1.4 3-4 NONE  
25/01 AM 10.6/11.1 0.9/ 1.4 0.9/ 1.4 3 NONE  
25/01 PM 9.6/10.1 -0.2/ 0.3 0.6/ 1.1 2 NONE  
 
 
 
 
 
MAZ021-231515-  
/O.CON.KBOX.SU.Y.0001.000000T0000Z-250824T0000Z/  
SOUTHERN PLYMOUTH MA-  
1010 PM EDT FRI AUG 22 2025  
   
..HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT SATURDAY  
 
* WHAT...LARGE BREAKING WAVES OF UP TO 3 FEET IN THE SURF ZONE.  
 
* WHERE...SOUTHERN PLYMOUTH MA COUNTY.  
 
* WHEN...UNTIL 8 PM EDT SATURDAY.  
 
* IMPACTS...DANGEROUS SWIMMING AND SURFING CONDITIONS AND  
LOCALIZED BEACH EROSION.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
INEXPERIENCED SWIMMERS SHOULD REMAIN OUT OF THE WATER DUE TO  
DANGEROUS SURF CONDITIONS.  
 
 
 
 
 
MAZ015-016-230600-  
/O.CON.KBOX.CF.S.0004.000000T0000Z-250823T0600Z/  
SUFFOLK MA-EASTERN NORFOLK MA-  
1010 PM EDT FRI AUG 22 2025  
 
...COASTAL FLOOD STATEMENT REMAINS IN EFFECT UNTIL 2 AM EDT  
SATURDAY...  
 
* WHAT... UP TO ONE HALF FOOT OF INUNDATION ABOVE GROUND LEVEL  
IN LOW-LYING AREAS NEAR SHORELINES AND TIDAL WATERWAYS (11.8  
TO 12.1 FEET MEAN LOWER LOW WATER).  
 
* WHERE...SUFFOLK MA AND EASTERN NORFOLK MA COUNTIES.  
 
* WHEN...UNTIL 2 AM EDT SATURDAY.  
 
* 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.  
 
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  
-------- --------- --------- --------- ------- --------  
22/11 PM 11.9/12.4 1.6/ 2.0 1.4/ 1.9 1 NONE  
23/12 PM 10.6/11.1 0.2/ 0.8 0.9/ 1.4 1-2 NONE  
24/12 AM 11.1/11.6 0.8/ 1.3 0.6/ 1.1 2 NONE  
24/01 PM 10.5/11.0 0.2/ 0.7 0.7/ 1.1 2 NONE  
25/01 AM 11.0/11.5 0.7/ 1.1 0.7/ 1.1 1-2 NONE  
25/01 PM 10.3/10.8 0.0/ 0.5 0.6/ 1.1 1-2 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  
-------- --------- --------- --------- ------- --------  
22/11 PM 11.6/12.1 1.7/ 2.2 1.4/ 1.9 1 NONE  
23/12 PM 10.3/10.8 0.4/ 0.9 0.8/ 1.3 1-2 NONE  
24/12 AM 10.6/11.1 0.7/ 1.1 0.4/ 0.9 2 NONE  
24/01 PM 10.3/10.8 0.4/ 0.9 0.7/ 1.1 2 NONE  
25/01 AM 10.7/11.2 0.8/ 1.3 0.7/ 1.1 1 NONE  
25/01 PM 9.9/10.4 0.0/ 0.5 0.5/ 1.0 1-2 NONE  
 
 
 
 
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