Marine Weather Message
Issued by NWS Boston, MA

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585
WHUS71 KBOX 221803
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
203 PM EDT Fri Aug 22 2025

ANZ254-255-230900-
/O.CAN.KBOX.GL.W.0026.000000T0000Z-250823T0000Z/
/O.EXB.KBOX.SC.Y.0086.000000T0000Z-250825T0000Z/
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-
203 PM EDT Fri Aug 22 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT SUNDAY...
...GALE WARNING IS CANCELLED...

* WHAT...South winds 10 to 20 kt with gusts up to 30 kt and seas
  8 to 13 feet.

* 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...Until 8 PM EDT 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.

&&

$$

ANZ232-230900-
/O.CAN.KBOX.GL.W.0026.000000T0000Z-250823T0000Z/
/O.EXB.KBOX.SC.Y.0086.000000T0000Z-250823T2300Z/
Nantucket Sound-
203 PM EDT Fri Aug 22 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 PM EDT SATURDAY...
...GALE WARNING IS CANCELLED...

* WHAT...Southwest winds 10 to 20 kt with gusts up to 25 kt and
  seas 4 to 6 feet.

* WHERE...Nantucket Sound.

* WHEN...Until 7 PM EDT Saturday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ231-230500-
/O.CAN.KBOX.GL.W.0026.000000T0000Z-250823T0000Z/
/O.EXB.KBOX.SC.Y.0086.000000T0000Z-250823T0500Z/
Cape Cod Bay-
203 PM EDT Fri Aug 22 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 1 AM EDT SATURDAY...
...GALE WARNING IS CANCELLED...

* WHAT...East winds 5 to 15 kt with gusts up to 25 kt and seas 3
  to 5 feet.

* WHERE...Cape Cod Bay.

* WHEN...Until 1 AM EDT Saturday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ250-230900-
/O.CAN.KBOX.GL.W.0026.000000T0000Z-250823T0000Z/
/O.EXB.KBOX.SC.Y.0086.000000T0000Z-250825T0000Z/
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
203 PM EDT Fri Aug 22 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT SUNDAY...
...GALE WARNING IS CANCELLED...

* WHAT...South winds 10 to 20 kt with gusts up to 30 kt and seas
  6 to 11 feet.

* WHERE...Coastal waters east of Ipswich Bay and the Stellwagen
  Bank National Marine Sanctuary.

* WHEN...Until 8 PM EDT 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.

&&

$$

ANZ233-235-237-230900-
/O.EXP.KBOX.GL.W.0026.000000T0000Z-250822T1800Z/
/O.EXB.KBOX.SC.Y.0086.000000T0000Z-250823T1100Z/
Vineyard Sound-Rhode Island Sound-Block Island Sound-
203 PM EDT Fri Aug 22 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 7 AM EDT SATURDAY...
...GALE WARNING HAS EXPIRED...

* WHAT...South winds 5 to 15 kt and seas 4 to 7 feet.

* WHERE...In Massachusetts coastal waters, Vineyard Sound. In
  Rhode Island coastal waters, Rhode Island Sound and Block
  Island Sound.

* WHEN...Until 7 AM EDT Saturday.

* IMPACTS...Conditions will be hazardous to small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.

&&

$$

ANZ256-230900-
/O.EXP.KBOX.GL.W.0026.000000T0000Z-250822T1800Z/
/O.EXB.KBOX.SC.Y.0086.000000T0000Z-250825T0000Z/
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
203 PM EDT Fri Aug 22 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 PM EDT SUNDAY...
...GALE WARNING HAS EXPIRED...

* WHAT...South winds 5 to 15 kt and seas 7 to 10 feet.

* WHERE...Coastal Waters from Montauk NY to Marthas Vineyard
  extending out to 20 nm South of Block Island.

* WHEN...Until 8 PM EDT 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.

&&

$$

ANZ234-221915-
/O.EXP.KBOX.GL.W.0026.000000T0000Z-250822T1800Z/
Buzzards Bay-
203 PM EDT Fri Aug 22 2025

...GALE WARNING HAS EXPIRED...

Winds have diminished less than 25 kt with seas less than 5 feet.

$$

ANZ230-236-221915-
/O.EXP.KBOX.SC.Y.0086.000000T0000Z-250822T1800Z/
Boston Harbor-Narragansett Bay-
203 PM EDT Fri Aug 22 2025

...SMALL CRAFT ADVISORY HAS EXPIRED...

Winds have diminished less than 25 kt with seas less than 5 feet.

$$

ANZ251-230900-
/O.EXT.KBOX.SC.Y.0086.000000T0000Z-250824T1100Z/
Massachusetts Bay and Ipswich Bay-
203 PM EDT Fri Aug 22 2025

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 7 AM EDT SUNDAY...

* WHAT...South winds 10 to 20 kt with gusts up to 25 kt and seas
  4 to 6 feet.

* WHERE...Massachusetts Bay and Ipswich Bay.

* WHEN...Until 7 AM EDT 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.

&&

$$