583
WHUS71 KBOX 201830
MWWBOX
URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
230 PM EDT SUN SEP 20 2026
ANZ231-210730-
/O.EXA.KBOX.SC.Y.0087.260921T1200Z-260922T0000Z/
CAPE COD BAY-
230 PM EDT SUN SEP 20 2026
..SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM TO 8 PM EDT MONDAY
* WHAT...NORTHEAST WINDS 10 TO 20 KT WITH GUSTS UP TO 30 KT AND
SEAS 2 TO 3 FEET EXPECTED.
* WHERE...CAPE COD BAY.
* WHEN...FROM 8 AM TO 8 PM EDT MONDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.
ANZ255-256-210730-
/O.CON.KBOX.SC.Y.0087.260921T1200Z-260922T0700Z/
/O.CON.KBOX.GL.A.0017.260922T1800Z-260924T1700Z/
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
230 PM EDT SUN SEP 20 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 AM MONDAY TO
3 AM EDT TUESDAY...
...GALE WATCH REMAINS IN EFFECT FROM TUESDAY AFTERNOON THROUGH
THURSDAY AFTERNOON...
* WHAT...FOR THE SMALL CRAFT ADVISORY, NORTHEAST WINDS 10 TO 20
KT WITH GUSTS UP TO 30 KT AND SEAS 4 TO 6 FEET EXPECTED. FOR
THE GALE WATCH, NORTHEAST WINDS 25 TO 35 KT WITH GUSTS UP TO
40 KT AND SEAS 8 TO 13 FEET POSSIBLE.
* WHERE...IN MASSACHUSETTS COASTAL WATERS, COASTAL WATERS
EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD AND
NANTUCKET. IN RHODE ISLAND COASTAL WATERS, COASTAL WATERS FROM
MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT TO 20 NM SOUTH OF
BLOCK ISLAND.
* WHEN...FOR THE SMALL CRAFT ADVISORY, FROM 8 AM MONDAY TO 3 AM
EDT TUESDAY. FOR THE GALE WATCH, FROM TUESDAY AFTERNOON
THROUGH THURSDAY AFTERNOON.
* 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.
ANZ254-210730-
/O.CON.KBOX.SC.Y.0087.260921T1200Z-260922T0700Z/
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
230 PM EDT SUN SEP 20 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 AM MONDAY TO
3 AM EDT TUESDAY...
* WHAT...NORTHEAST WINDS 10 TO 20 KT WITH GUSTS UP TO 25 KT AND
SEAS 3 TO 5 FEET EXPECTED.
* WHERE...COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO
NANTUCKET MA OUT 20 NM.
* WHEN...FROM 8 AM MONDAY TO 3 AM EDT TUESDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.
ANZ233>235-237-210730-
/O.CON.KBOX.SC.Y.0087.260921T1200Z-260922T0000Z/
VINEYARD SOUND-BUZZARDS BAY-RHODE ISLAND SOUND-BLOCK ISLAND SOUND-
230 PM EDT SUN SEP 20 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 AM TO 8 PM EDT
MONDAY...
* WHAT...NORTHEAST WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT AND
SEAS 2 TO 4 FEET EXPECTED.
* WHERE...IN MASSACHUSETTS COASTAL WATERS, VINEYARD SOUND AND
BUZZARDS BAY. IN RHODE ISLAND COASTAL WATERS, RHODE ISLAND
SOUND AND BLOCK ISLAND SOUND.
* WHEN...FROM 8 AM TO 8 PM EDT MONDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.
ANZ232-210730-
/O.CON.KBOX.SC.Y.0087.260921T1200Z-260922T0000Z/
NANTUCKET SOUND-
230 PM EDT SUN SEP 20 2026
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 AM TO 8 PM EDT
MONDAY...
* WHAT...NORTHEAST WINDS 15 TO 20 KT WITH GUSTS UP TO 25 KT AND
SEAS 2 TO 4 FEET EXPECTED.
* WHERE...NANTUCKET SOUND.
* WHEN...FROM 8 AM TO 8 PM EDT MONDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.
ANZ282-283-210730-
/O.CON.KBOX.GL.A.0017.260922T1800Z-260924T1700Z/
OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM 25 TO 60 NM-
OCEAN WATERS FROM MONTAUK NY TO MARTHAS VINEYARD FROM 25 TO 60 NM-
230 PM EDT SUN SEP 20 2026
...GALE WATCH REMAINS IN EFFECT FROM TUESDAY AFTERNOON THROUGH
THURSDAY AFTERNOON...
* WHAT...NORTHEAST WINDS 25 TO 35 KT WITH GUSTS UP TO 40 KT AND
SEAS 11 TO 16 FEET POSSIBLE.
* WHERE...OCEAN WATERS FROM MARTHAS VINEYARD TO NANTUCKET FROM
25 TO 60 NM AND OCEAN WATERS FROM MONTAUK NY TO MARTHAS
VINEYARD FROM 25 TO 60 NM.
* WHEN...FROM TUESDAY AFTERNOON THROUGH THURSDAY AFTERNOON.
* 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.
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