003
WHUS71 KBOX 201831
MWWBOX
URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
231 PM EDT WED AUG 20 2025
ANZ254-255-210930-
/O.CAN.KBOX.SC.Y.0084.000000T0000Z-250821T1200Z/
/O.UPG.KBOX.GL.A.0014.250821T1200Z-250823T0500Z/
/O.NEW.KBOX.GL.W.0026.250821T1200Z-250823T0000Z/
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
COASTAL WATERS EXTENDING OUT TO 25 NM SOUTH OF MARTHAS VINEYARD
AND NANTUCKET-
231 PM EDT WED AUG 20 2025
..GALE WARNING IN EFFECT FROM 8 AM THURSDAY TO 8 PM EDT FRIDAY
..SMALL CRAFT ADVISORY IS CANCELLED
* WHAT...NORTHEAST WINDS 25 TO 35 KT WITH GUSTS UP TO 45 KT AND
SEAS 12 TO 17 FEET EXPECTED.
* WHERE...COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO
NANTUCKET MA OUT 20 NM AND COASTAL WATERS EXTENDING OUT TO 25
NM SOUTH OF MARTHAS VINEYARD AND NANTUCKET.
* WHEN...FROM 8 AM THURSDAY TO 8 PM EDT FRIDAY.
* 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.
ANZ256-210930-
/O.CAN.KBOX.SC.Y.0084.000000T0000Z-250821T1200Z/
/O.UPG.KBOX.GL.A.0014.250821T1200Z-250822T1800Z/
/O.NEW.KBOX.GL.W.0026.250821T1200Z-250822T1800Z/
COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD EXTENDING OUT
TO 20 NM SOUTH OF BLOCK ISLAND-
231 PM EDT WED AUG 20 2025
..GALE WARNING IN EFFECT FROM 8 AM THURSDAY TO 2 PM EDT FRIDAY
..SMALL CRAFT ADVISORY IS CANCELLED
* WHAT...NORTHEAST WINDS 25 TO 35 KT WITH GUSTS UP TO 45 KT AND
SEAS 14 TO 19 FEET EXPECTED.
* WHERE...COASTAL WATERS FROM MONTAUK NY TO MARTHAS VINEYARD
EXTENDING OUT TO 20 NM SOUTH OF BLOCK ISLAND.
* WHEN...FROM 8 AM THURSDAY TO 2 PM EDT FRIDAY.
* 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.
ANZ233>235-237-210930-
/O.UPG.KBOX.GL.A.0014.250821T1200Z-250822T1800Z/
/O.NEW.KBOX.GL.W.0026.250821T1200Z-250822T1800Z/
VINEYARD SOUND-BUZZARDS BAY-RHODE ISLAND SOUND-BLOCK ISLAND SOUND-
231 PM EDT WED AUG 20 2025
..GALE WARNING IN EFFECT FROM 8 AM THURSDAY TO 2 PM EDT FRIDAY
* WHAT...NORTHEAST WINDS 20 TO 30 KT WITH GUSTS UP TO 40 KT AND
SEAS 9 TO 14 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 THURSDAY TO 2 PM EDT FRIDAY.
* 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.
ANZ232-210930-
/O.UPG.KBOX.GL.A.0014.250821T1200Z-250823T0500Z/
/O.NEW.KBOX.GL.W.0026.250821T1800Z-250823T0000Z/
NANTUCKET SOUND-
231 PM EDT WED AUG 20 2025
..GALE WARNING IN EFFECT FROM 2 PM THURSDAY TO 8 PM EDT FRIDAY
* WHAT...NORTHEAST WINDS 25 TO 35 KT WITH GUSTS UP TO 40 KT AND
SEAS 7 TO 10 FEET EXPECTED.
* WHERE...NANTUCKET SOUND.
* WHEN...FROM 2 PM THURSDAY TO 8 PM EDT FRIDAY.
* 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.
ANZ231-210930-
/O.UPG.KBOX.GL.A.0014.250821T1200Z-250823T0500Z/
/O.NEW.KBOX.GL.W.0026.250821T1800Z-250823T0000Z/
CAPE COD BAY-
231 PM EDT WED AUG 20 2025
..GALE WARNING IN EFFECT FROM 2 PM THURSDAY TO 8 PM EDT FRIDAY
* WHAT...NORTHEAST WINDS 15 TO 25 KT WITH GUSTS UP TO 35 KT AND
SEAS 4 TO 7 FEET EXPECTED.
* WHERE...CAPE COD BAY.
* WHEN...FROM 2 PM THURSDAY TO 8 PM EDT FRIDAY.
* 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.
ANZ250-210930-
/O.NEW.KBOX.GL.W.0026.250821T1800Z-250823T0000Z/
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK
NATIONAL MARINE SANCTUARY-
231 PM EDT WED AUG 20 2025
..GALE WARNING IN EFFECT FROM 2 PM THURSDAY TO 8 PM EDT FRIDAY
* WHAT...NORTHEAST WINDS 15 TO 25 KT WITH GUSTS UP TO 35 KT AND
SEAS 7 TO 12 FEET EXPECTED.
* WHERE...COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN
BANK NATIONAL MARINE SANCTUARY.
* WHEN...FROM 2 PM THURSDAY TO 8 PM EDT FRIDAY.
* 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.
ANZ251-210930-
/O.NEW.KBOX.SC.Y.0086.250821T1800Z-250823T0000Z/
MASSACHUSETTS BAY AND IPSWICH BAY-
231 PM EDT WED AUG 20 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THURSDAY TO 8 PM EDT
FRIDAY...
* WHAT...NORTHEAST WINDS 15 TO 25 KT WITH GUSTS UP TO 30 KT AND
SEAS 5 TO 8 FEET EXPECTED.
* WHERE...MASSACHUSETTS BAY AND IPSWICH BAY.
* WHEN...FROM 2 PM THURSDAY TO 8 PM EDT FRIDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.
ANZ236-210930-
/O.NEW.KBOX.SC.Y.0086.250821T1800Z-250822T1800Z/
NARRAGANSETT BAY-
231 PM EDT WED AUG 20 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THURSDAY TO 2 PM EDT
FRIDAY...
* WHAT...NORTHEAST WINDS 15 TO 25 KT WITH GUSTS UP TO 30 KT AND
WAVES AROUND 3 FEET EXPECTED.
* WHERE...NARRAGANSETT BAY.
* WHEN...FROM 2 PM THURSDAY TO 2 PM EDT FRIDAY.
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.
ANZ230-210930-
/O.NEW.KBOX.SC.Y.0086.250821T1800Z-250822T1800Z/
BOSTON HARBOR-
231 PM EDT WED AUG 20 2025
...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM THURSDAY TO 2 PM EDT
FRIDAY...
* WHAT...NORTHEAST WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT AND
WAVES 1 TO 3 FEET EXPECTED.
* WHERE...BOSTON HARBOR.
* WHEN...FROM 2 PM THURSDAY TO 2 PM EDT FRIDAY.
* 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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