251
WHUS71 KBOX 201046
MWWBOX
URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
546 AM EST SAT DEC 20 2025
ANZ256-210000-
/O.CAN.KBOX.GL.W.0045.000000T0000Z-251220T1400Z/
/O.NEW.KBOX.SC.Y.0131.251220T1046Z-251221T0600Z/
/O.NEW.KBOX.GL.A.0028.251221T0600Z-251221T1400Z/
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
546 AM EST SAT DEC 20 2025
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM EST SUNDAY
...GALE WATCH IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY
MORNING...
* WHAT...FOR THE SMALL CRAFT ADVISORY, WEST WINDS 15 TO 25 KT
WITH GUSTS UP TO 30 KT AND SEAS 9 TO 14 FEET. FOR THE GALE
WATCH, SOUTHWEST WINDS 20 TO 30 KT WITH GUSTS UP TO 35 KT AND
SEAS 7 TO 10 FEET POSSIBLE.
* WHERE...COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD
EXTENDING OUT TO 20 NM SOUTH OF BLOCK ISLAND.
* WHEN...FOR THE SMALL CRAFT ADVISORY, UNTIL 1 AM EST SUNDAY.
FOR THE GALE WATCH, FROM LATE TONIGHT THROUGH SUNDAY MORNING.
* IMPACTS...STRONG WINDS CAN CAUSE HAZARDOUS SEAS WHICH COULD
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MARINERS SHOULD CONSIDER ALTERING PLANS TO AVOID POSSIBLE
HAZARDOUS CONDITIONS. REMAIN IN PORT, SEEK SAFE HARBOR, ALTER
COURSE, AND/OR SECURE THE VESSEL FOR SEVERE WIND AND SEAS.
ANZ235-237-210000-
/O.CAN.KBOX.GL.W.0045.000000T0000Z-251220T1400Z/
/O.NEW.KBOX.SC.Y.0131.251220T1046Z-251221T0600Z/
/O.NEW.KBOX.GL.A.0028.251221T0600Z-251221T1400Z/
RHODE ISLAND SOUND-BLOCK ISLAND SOUND-
546 AM EST SAT DEC 20 2025
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM EST SUNDAY
...GALE WATCH IN EFFECT FROM LATE TONIGHT THROUGH SUNDAY
MORNING...
* WHAT...FOR THE SMALL CRAFT ADVISORY, WEST WINDS 15 TO 25 KT
WITH GUSTS UP TO 30 KT AND SEAS 7 TO 10 FEET. FOR THE GALE
WATCH, SOUTHWEST WINDS 20 TO 25 KT WITH GUSTS UP TO 35 KT AND
SEAS 5 TO 8 FEET POSSIBLE.
* WHERE...RHODE ISLAND SOUND AND BLOCK ISLAND SOUND.
* WHEN...FOR THE SMALL CRAFT ADVISORY, UNTIL 1 AM EST SUNDAY.
FOR THE GALE WATCH, FROM LATE TONIGHT THROUGH SUNDAY MORNING.
* IMPACTS...STRONG WINDS CAN CAUSE HAZARDOUS SEAS WHICH COULD
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MARINERS SHOULD CONSIDER ALTERING PLANS TO AVOID POSSIBLE
HAZARDOUS CONDITIONS. REMAIN IN PORT, SEEK SAFE HARBOR, ALTER
COURSE, AND/OR SECURE THE VESSEL FOR SEVERE WIND AND SEAS.
ANZ232>234-210000-
/O.CAN.KBOX.GL.W.0045.000000T0000Z-251220T1400Z/
/O.NEW.KBOX.SC.Y.0131.251220T1046Z-251221T1200Z/
NANTUCKET SOUND-VINEYARD SOUND-BUZZARDS BAY-
546 AM EST SAT DEC 20 2025
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 AM EST SUNDAY
* WHAT...SOUTHWEST WINDS 15 TO 25 KT WITH GUSTS UP TO 30 KT AND
SEAS 5 TO 8 FEET.
* WHERE...NANTUCKET SOUND, VINEYARD SOUND AND BUZZARDS BAY.
* WHEN...UNTIL 7 AM EST SUNDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.
ANZ231-251-210000-
/O.CAN.KBOX.GL.W.0045.000000T0000Z-251220T1400Z/
/O.NEW.KBOX.SC.Y.0131.251220T1046Z-251221T1200Z/
CAPE COD BAY-MASSACHUSETTS BAY AND IPSWICH BAY-
546 AM EST SAT DEC 20 2025
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 AM EST SUNDAY
* WHAT...SOUTHWEST WINDS 20 TO 30 KT WITH GUSTS UP TO 35 KT AND
SEAS 4 TO 6 FEET.
* WHERE...CAPE COD BAY AND MASSACHUSETTS BAY AND IPSWICH BAY.
* WHEN...UNTIL 7 AM EST SUNDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.
ANZ255-210000-
/O.CAN.KBOX.GL.W.0045.000000T0000Z-251220T1400Z/
/O.NEW.KBOX.SC.Y.0131.251220T1046Z-251221T0600Z/
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
546 AM EST SAT DEC 20 2025
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM EST SUNDAY
* WHAT...WEST WINDS 20 TO 30 KT AND SEAS 10 TO 15 FEET.
* WHERE...COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS
VINEYARD AND NANTUCKET.
* WHEN...UNTIL 1 AM EST SUNDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.
ANZ230-201500-
/O.CAN.KBOX.GL.W.0045.000000T0000Z-251220T1200Z/
/O.NEW.KBOX.SC.Y.0131.251220T1046Z-251220T1500Z/
BOSTON HARBOR-
546 AM EST SAT DEC 20 2025
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM EST THIS MORNING
* WHAT...WEST WINDS 15 TO 25 KT WITH GUSTS UP TO 30 KT AND WAVES
AROUND 2 FEET.
* WHERE...BOSTON HARBOR.
* WHEN...UNTIL 10 AM EST THIS MORNING.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.
ANZ250-254-201400-
/O.CON.KBOX.GL.W.0045.000000T0000Z-251220T1400Z/
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
546 AM EST SAT DEC 20 2025
..GALE WARNING REMAINS IN EFFECT UNTIL 9 AM EST THIS MORNING
* WHAT...WEST WINDS 20 TO 30 KT WITH GUSTS UP TO 35 KT AND SEAS
7 TO 12 FEET.
* WHERE...COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN
BANK NATIONAL MARINE SANCTUARY AND COASTAL WATERS FROM
PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA OUT 20 NM.
* WHEN...UNTIL 9 AM EST THIS MORNING.
* IMPACTS...STRONG WINDS WILL CAUSE HAZARDOUS SEAS WHICH COULD
CAPSIZE OR DAMAGE VESSELS AND REDUCE VISIBILITY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
MARINERS SHOULD ALTER PLANS TO AVOID THESE HAZARDOUS CONDITIONS.
REMAIN IN PORT, SEEK SAFE HARBOR, ALTER COURSE, AND/OR SECURE THE
VESSEL FOR HAZARDOUS CONDITIONS.
ANZ236-201500-
/O.NEW.KBOX.SC.Y.0131.251220T1046Z-251220T1500Z/
NARRAGANSETT BAY-
546 AM EST SAT DEC 20 2025
..SMALL CRAFT ADVISORY IN EFFECT UNTIL 10 AM EST THIS MORNING
* WHAT...WEST WINDS 10 TO 20 KT WITH GUSTS UP TO 25 KT AND WAVES
1 TO 3 FEET.
* WHERE...NARRAGANSETT BAY.
* WHEN...UNTIL 10 AM EST THIS MORNING.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.
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