Small Craft Advisory 101, NWS Boston/Norton, MA

484 
WHUS71 KBOX 160604
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
204 AM EDT Thu Oct 16 2025

ANZ231-251-161915-
/O.EXT.KBOX.GL.W.0029.251016T1200Z-251017T0900Z/
Cape Cod Bay-Massachusetts Bay and Ipswich Bay-
204 AM EDT Thu Oct 16 2025

...GALE WARNING NOW IN EFFECT FROM 8 AM THIS MORNING TO 5 AM EDT
FRIDAY...

* WHAT...North winds 20 to 25 kt with gusts up to 35 kt and seas 
  4 to 7 feet expected.

* WHERE...Cape Cod Bay and Massachusetts Bay and Ipswich Bay.

* WHEN...From 8 AM this morning to 5 AM 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.

&&

$$

ANZ232-161915-
/O.EXT.KBOX.GL.W.0029.251016T1200Z-251017T1200Z/
Nantucket Sound-
204 AM EDT Thu Oct 16 2025

...GALE WARNING NOW IN EFFECT FROM 8 AM THIS MORNING TO 8 AM EDT
FRIDAY...

* WHAT...North winds 20 to 30 kt with gusts up to 35 kt and seas 
  4 to 6 feet expected.

* WHERE...Nantucket Sound.

* WHEN...From 8 AM this morning to 8 AM 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.

&&

$$

ANZ254-255-161915-
/O.EXT.KBOX.GL.W.0029.251016T1200Z-251017T1500Z/
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-
204 AM EDT Thu Oct 16 2025

...GALE WARNING NOW IN EFFECT FROM 8 AM THIS MORNING TO 11 AM EDT
FRIDAY...

* WHAT...North winds 20 to 30 kt with gusts up to 35 kt and seas 
  7 to 10 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 this morning to 11 AM 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.

&&

$$

ANZ250-161915-
/O.EXT.KBOX.GL.W.0029.251016T1200Z-251017T1200Z/
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
204 AM EDT Thu Oct 16 2025

...GALE WARNING NOW IN EFFECT FROM 8 AM THIS MORNING TO 8 AM EDT
FRIDAY...

* WHAT...North winds 20 to 30 kt with gusts up to 35 kt and seas 
  6 to 9 feet expected.

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

* WHEN...From 8 AM this morning to 8 AM 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.

&&

$$

ANZ235-237-161915-
/O.EXT.KBOX.SC.Y.0100.000000T0000Z-251017T2100Z/
Rhode Island Sound-Block Island Sound-
204 AM EDT Thu Oct 16 2025

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 5 PM EDT FRIDAY...

* WHAT...North winds 15 to 25 kt with gusts up to 30 kt and seas 
  3 to 5 feet.

* WHERE...Rhode Island Sound and Block Island Sound.

* WHEN...Until 5 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.

&&

$$

ANZ233-234-161915-
/O.EXT.KBOX.SC.Y.0100.251016T1200Z-251017T2100Z/
Vineyard Sound-Buzzards Bay-
204 AM EDT Thu Oct 16 2025

...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 8 AM THIS MORNING TO
5 PM EDT FRIDAY...

* WHAT...North winds 15 to 20 kt with gusts up to 30 kt and seas 
  around 3 feet expected.

* WHERE...Vineyard Sound and Buzzards Bay.

* WHEN...From 8 AM this morning to 5 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.

&&

$$

ANZ236-161915-
/O.EXT.KBOX.SC.Y.0101.251016T1200Z-251017T1800Z/
Narragansett Bay-
204 AM EDT Thu Oct 16 2025

...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 8 AM THIS MORNING TO
2 PM EDT FRIDAY...

* WHAT...North winds 15 to 20 kt with gusts up to 25 kt and 
  waves 2 to 3 feet expected.

* WHERE...Narragansett Bay.

* WHEN...From 8 AM this morning 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.

&&

$$

ANZ230-161915-
/O.EXT.KBOX.SC.Y.0101.251016T1200Z-251017T1800Z/
Boston Harbor-
204 AM EDT Thu Oct 16 2025

...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 8 AM THIS MORNING TO
2 PM EDT FRIDAY...

* WHAT...North winds 10 to 20 kt with gusts up to 30 kt and 
  waves around 2 feet expected.

* WHERE...Boston Harbor.

* WHEN...From 8 AM this morning 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.

&&

$$

ANZ256-161915-
/O.CON.KBOX.SC.Y.0100.000000T0000Z-251018T0000Z/
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
204 AM EDT Thu Oct 16 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT FRIDAY...

* WHAT...North winds 15 to 25 kt with gusts up to 30 kt and seas 
  5 to 8 feet.

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

* WHEN...Until 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.

&&

$$

903 
WHUS71 KBOX 161904
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
304 PM EDT Thu Oct 16 2025

ANZ231-251-170900-
/O.CON.KBOX.GL.W.0029.000000T0000Z-251017T0900Z/
Cape Cod Bay-Massachusetts Bay and Ipswich Bay-
304 PM EDT Thu Oct 16 2025

...GALE WARNING REMAINS IN EFFECT UNTIL 5 AM EDT FRIDAY...

* WHAT...North 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 5 AM 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.

&&

$$

ANZ232-171000-
/O.CON.KBOX.GL.W.0029.000000T0000Z-251017T1200Z/
Nantucket Sound-
304 PM EDT Thu Oct 16 2025

...GALE WARNING REMAINS IN EFFECT UNTIL 8 AM EDT FRIDAY...

* WHAT...North winds 25 to 35 kt and seas 3 to 5 feet.

* WHERE...Nantucket Sound.

* WHEN...Until 8 AM 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.

&&

$$

ANZ254-255-171000-
/O.CON.KBOX.GL.W.0029.000000T0000Z-251017T1500Z/
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-
304 PM EDT Thu Oct 16 2025

...GALE WARNING REMAINS IN EFFECT UNTIL 11 AM EDT FRIDAY...

* WHAT...North winds 20 to 30 kt with gusts up to 35 kt and seas 
  7 to 10 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 11 AM 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.

&&

$$

ANZ250-171000-
/O.CON.KBOX.GL.W.0029.000000T0000Z-251017T1200Z/
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
304 PM EDT Thu Oct 16 2025

...GALE WARNING REMAINS IN EFFECT UNTIL 8 AM EDT FRIDAY...

* WHAT...North winds 20 to 30 kt with gusts up to 40 kt and seas 
  6 to 9 feet.

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

* WHEN...Until 8 AM 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.

&&

$$

ANZ235-237-171000-
/O.CON.KBOX.SC.Y.0100.000000T0000Z-251017T2100Z/
Rhode Island Sound-Block Island Sound-
304 PM EDT Thu Oct 16 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 5 PM EDT FRIDAY...

* WHAT...North winds 15 to 25 kt and seas 3 to 5 feet.

* WHERE...Rhode Island Sound and Block Island Sound.

* WHEN...Until 5 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.

&&

$$

ANZ233-234-171000-
/O.CON.KBOX.SC.Y.0100.000000T0000Z-251017T2100Z/
Vineyard Sound-Buzzards Bay-
304 PM EDT Thu Oct 16 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 5 PM EDT FRIDAY...

* WHAT...North winds 15 to 25 kt with gusts up to 30 kt and seas 
  around 3 feet.

* WHERE...Vineyard Sound and Buzzards Bay.

* WHEN...Until 5 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.

&&

$$

ANZ236-171000-
/O.CON.KBOX.SC.Y.0101.000000T0000Z-251017T1800Z/
Narragansett Bay-
304 PM EDT Thu Oct 16 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT FRIDAY...

* WHAT...North winds 15 to 20 kt with gusts up to 25 kt and 
  waves 2 to 3 feet.

* WHERE...Narragansett Bay.

* WHEN...Until 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.

&&

$$

ANZ230-171000-
/O.CON.KBOX.SC.Y.0101.000000T0000Z-251017T1800Z/
Boston Harbor-
304 PM EDT Thu Oct 16 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT FRIDAY...

* WHAT...North winds 15 to 25 kt and waves around 2 feet.

* WHERE...Boston Harbor.

* WHEN...Until 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.

&&

$$

ANZ256-171000-
/O.CON.KBOX.SC.Y.0100.000000T0000Z-251018T0000Z/
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
304 PM EDT Thu Oct 16 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT FRIDAY...

* WHAT...North winds 20 to 30 kt with gusts up to 35 kt and seas 
  4 to 7 feet.

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

* WHEN...Until 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.

&&

$$

095 
WHUS71 KBOX 170856
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
456 AM EDT Fri Oct 17 2025

ANZ250-172200-
/O.CAN.KBOX.GL.W.0029.000000T0000Z-251017T1200Z/
/O.EXB.KBOX.SC.Y.0100.000000T0000Z-251019T0000Z/
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
456 AM EDT Fri Oct 17 2025

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

* WHAT...North winds 15 to 25 kt with gusts up to 30 kt and seas 
  6 to 9 feet.

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

* WHEN...Until 8 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.

&&

$$

ANZ251-172200-
/O.CAN.KBOX.GL.W.0029.000000T0000Z-251017T0900Z/
/O.EXB.KBOX.SC.Y.0100.000000T0000Z-251019T0000Z/
Massachusetts Bay and Ipswich Bay-
456 AM EDT Fri Oct 17 2025

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

* WHAT...North 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 8 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.

&&

$$

ANZ231-172200-
/O.CAN.KBOX.GL.W.0029.000000T0000Z-251017T0900Z/
/O.EXA.KBOX.SC.Y.0100.000000T0000Z-251018T0000Z/
Cape Cod Bay-
456 AM EDT Fri Oct 17 2025

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

* WHAT...North winds 15 to 25 kt with gusts up to 30 kt and seas 
  4 to 6 feet.

* WHERE...Cape Cod Bay.

* WHEN...Until 8 PM EDT this evening.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

ANZ232-172200-
/O.CAN.KBOX.GL.W.0029.000000T0000Z-251017T1200Z/
/O.EXA.KBOX.SC.Y.0100.000000T0000Z-251018T0000Z/
Nantucket Sound-
456 AM EDT Fri Oct 17 2025

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

* WHAT...North winds 15 to 25 kt with gusts up to 30 kt and seas 
  3 to 5 feet.

* WHERE...Nantucket Sound.

* WHEN...Until 8 PM EDT this evening.

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


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

ANZ254-255-171500-
/O.CON.KBOX.GL.W.0029.000000T0000Z-251017T1500Z/
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-
456 AM EDT Fri Oct 17 2025

...GALE WARNING REMAINS IN EFFECT UNTIL 11 AM EDT THIS MORNING...

* WHAT...North winds 20 to 25 kt with gusts up to 30 kt and seas 
  7 to 10 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 11 AM EDT 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.

&&

$$

ANZ235-237-171800-
/O.EXT.KBOX.SC.Y.0100.000000T0000Z-251017T1800Z/
Rhode Island Sound-Block Island Sound-
456 AM EDT Fri Oct 17 2025

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 2 PM EDT THIS
AFTERNOON...

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

* WHERE...Rhode Island Sound and Block Island Sound.

* WHEN...Until 2 PM EDT this afternoon.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

ANZ233-234-171800-
/O.EXT.KBOX.SC.Y.0100.000000T0000Z-251017T1800Z/
Vineyard Sound-Buzzards Bay-
456 AM EDT Fri Oct 17 2025

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 2 PM EDT THIS
AFTERNOON...

* WHAT...North winds 15 to 20 kt with gusts up to 25 kt and seas 
  around 3 feet.

* WHERE...Vineyard Sound and Buzzards Bay.

* WHEN...Until 2 PM EDT this afternoon.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

ANZ236-171800-
/O.CON.KBOX.SC.Y.0101.000000T0000Z-251017T1800Z/
Narragansett Bay-
456 AM EDT Fri Oct 17 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT THIS
AFTERNOON...

* WHAT...North winds 10 to 15 kt with gusts up to 25 kt and 
  waves around 2 feet.

* WHERE...Narragansett Bay.

* WHEN...Until 2 PM EDT this afternoon.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

ANZ230-171800-
/O.CON.KBOX.SC.Y.0101.000000T0000Z-251017T1800Z/
Boston Harbor-
456 AM EDT Fri Oct 17 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT THIS
AFTERNOON...

* WHAT...North winds 10 to 15 kt with gusts up to 25 kt and 
  waves around 2 feet.

* WHERE...Boston Harbor.

* WHEN...Until 2 PM EDT this afternoon.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

ANZ256-172200-
/O.CON.KBOX.SC.Y.0100.000000T0000Z-251018T0000Z/
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
456 AM EDT Fri Oct 17 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

* WHAT...North winds 15 to 25 kt and seas 4 to 7 feet.

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

* WHEN...Until 8 PM EDT this evening.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

971 
WHUS71 KBOX 171736
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
136 PM EDT Fri Oct 17 2025

ANZ235-237-171845-
/O.EXP.KBOX.SC.Y.0100.000000T0000Z-251017T1800Z/
Rhode Island Sound-Block Island Sound-
136 PM EDT Fri Oct 17 2025

...SMALL CRAFT ADVISORY WILL EXPIRE AT 2 PM EDT THIS AFTERNOON...

.

$$

ANZ233-234-171845-
/O.EXP.KBOX.SC.Y.0100.000000T0000Z-251017T1800Z/
Vineyard Sound-Buzzards Bay-
136 PM EDT Fri Oct 17 2025

...SMALL CRAFT ADVISORY WILL EXPIRE AT 2 PM EDT THIS AFTERNOON...

.

$$

ANZ236-171845-
/O.EXP.KBOX.SC.Y.0101.000000T0000Z-251017T1800Z/
Narragansett Bay-
136 PM EDT Fri Oct 17 2025

...SMALL CRAFT ADVISORY WILL EXPIRE AT 2 PM EDT THIS AFTERNOON...

.

$$

ANZ230-171845-
/O.EXP.KBOX.SC.Y.0101.000000T0000Z-251017T1800Z/
Boston Harbor-
136 PM EDT Fri Oct 17 2025

...SMALL CRAFT ADVISORY WILL EXPIRE AT 2 PM EDT THIS AFTERNOON...

.

$$

ANZ254-255-180645-
/O.EXB.KBOX.SC.Y.0100.000000T0000Z-251019T1200Z/
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-
136 PM EDT Fri Oct 17 2025

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 8 AM EDT SUNDAY...

* WHAT...North winds 15 to 25 kt with gusts up to 30 kt and seas 
  6 to 9 feet.

* WHERE...Coastal waters from Provincetown to Chatham to Nantucket out
  20 nm and Coastal Waters extending out to 25 nm South of 
  Marthas Vineyard and Nantucket.

* WHEN...Until 8 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.

&&

$$

ANZ250-251-180645-
/O.EXT.KBOX.SC.Y.0100.000000T0000Z-251019T1200Z/
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-Massachusetts Bay and Ipswich Bay-
136 PM EDT Fri Oct 17 2025

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 8 AM EDT SUNDAY...

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

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

* WHEN...Until 8 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.

&&

$$

ANZ231-232-180000-
/O.CON.KBOX.SC.Y.0100.000000T0000Z-251018T0000Z/
Cape Cod Bay-Nantucket Sound-
136 PM EDT Fri Oct 17 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

* WHAT...North winds 15 to 25 kt with gusts up to 30 kt and seas 
  3 to 5 feet.

* WHERE...Cape Cod Bay and Nantucket Sound.

* WHEN...Until 8 PM EDT this evening.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

ANZ256-180000-
/O.CON.KBOX.SC.Y.0100.000000T0000Z-251018T0000Z/
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
136 PM EDT Fri Oct 17 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

* WHAT...North winds 10 to 20 kt with gusts up to 25 kt and seas 
  3 to 5 feet.

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

* WHEN...Until 8 PM EDT this evening.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

Area Forecast Discussion
National Weather Service Boston/Norton MA
211 PM EDT Wed Oct 15 2025

.SYNOPSIS...
Cloudy, cool, and blustery conditions today. An unseasonably
cool airmass brings below normal temps and blustery conditions
Thursday with ocean effect cloud cover, periods of rain showers
and stronger northerly breezes across the eastern Massachusetts
coast. Warming trend for Friday into the weekend before turning
more unsettled as we move into early next week.

&&

.NEAR TERM /THROUGH TONIGHT/...
Key Messages

* Cold and blustery overnight with near-freezing temperatures for
  much of southern New England

Tonight

Deep north/northwest flow continues to usher cool/dry air over
southern New England tonight. 925 hPa temps dip to near freezing.
This will support surface temperatures in the low to mid 30s across
southern New England. Temperatures will be more mild near the coast
in the upper 30s to low 40s...mid 40s Cape Cod. Tight pressure
gradient will support steady northwest winds from 10-15 mph
overnight which will yield wind chill temperatures near or below
freezing for most of the region.

&&

.SHORT TERM /THURSDAY THROUGH THURSDAY NIGHT/...

Key Messages

* Cooler temperatures tomorrow with continued gusty north/northwest
  winds

* Ocean effect rain showers likely over parts of The South Shore,
  Cape Cod, and The Islands.

Tomorrow

Little change in the overall synoptic setup tomorrow, though
temperatures will be much cooler as an upper-level low over northern
Maine digs south/southeast past southern New England during the day
tomorrow. This will place a rather robust upper-level cold pool over
our area with 500 hPa temps as low as -25C over southern New England
and 925 hPa temps below 0C to start Thursday. Steep lapse rates will
support efficient diurnal mixing which will result in high
temperatures in the low-mid 50s and also periods of 25-30 mph
northwest wind gusts across southern New England. The cooler air
over the relatively warmer ocean will likely result in some ocean-
effect showers over Cape Cod, The Islands, and perhaps sections of
The South Shore beginning tomorrow afternoon. Overall a cool/windy
day.

Tomorrow Night

The atmosphere will likely decouple across the interior overnight,
bringing an end to gusty northwest winds for most locations.
However, milder temperatures near the coast may continue to support
steep low-level lapse rates and enough mixing to support continued
gusty northwest winds overnight, particularly over Cape Cod.
Expected continued ocean effect showers over The Cape/Islands
tomorrow night as well. There won't be a whole lot of moisture to
work with so we're not anticipating any significant accumulations,
but perhaps 0.1 to 0.2 inches of new rainfall by Friday morning.

&&

.LONG TERM /FRIDAY THROUGH TUESDAY/...
Key Messages...

* Dry Fri/Sat/Sun with moderating temps..highs may approach 70 on Sun
* Some showers possible early next week...but timing is uncertain

Details...

Friday/Saturday/Sunday...

A mid level ridge axis approaches from the west as the upper trough
shifts east of the region. This will result in continued dry weather
with moderating temperatures. High temps Fri should be in the upper
50s to lower 60s with still some NW wind gusts around 20 mph. 850T
warm significantly by Saturday and while we will not be able to mix
that deep or fully realize at the surface...still expect highs to
reach the lower to middle 60s with light winds. As the high shifts
east of the region...high temps will probably reach between 65 and
70 on Sunday.

Early Next Week...

A vigorous shortwave trough will lift northeast across the Great
Lakes early next week with an associated surface low. A cold front
extending southward from the low pressure system will likely bring a
period of showers to the region sometime early next week...roughly
in the late Sunday night to Monday timeframe. However...there are a
few ensemble members that hint at a stronger secondary low pressure
system developing near or south of southern New England. If this
were to occur...another period of rain would be possible sometime
Tuesday into Wednesday...especially if this were to develop to our
south. Whether or not this happens...appears that we will see at
least one round of showers early next week in the late Sunday night
into Monday timeframe. As for temperatures...they likely run a bit
above normal especially in regards to overnight lows. High temps
will probably top out mainly in the lower to middle 60s.

&&

.AVIATION /18Z WEDNESDAY THROUGH MONDAY/...
Forecaster Confidence Levels...

Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.

12z TAF Update:

Today: Moderate Confidence

Guidance has improved this morning with the exception of the
lingering fog and low stratus across the South Coast & Cape.
IFR/MVFR cigs improving to MVFR/VFR with the sunrise. Less
certain on afternoon MVFR coverage inland to the I-95 corridor
as guidance generally remains mixed. Further west, CIGS should
be VFR this afternoon, but won't rule out brief periods of MVFR
with diurnal cumulus. Winds today stay NNW with gusts up to 20
knots in the afternoon.

Tonight: Moderate Confidence

VFR. with MVFR over the Cape and Islands. Steady northwest
winds around 15 knots with 20-25 knot gusts.

Tomorrow: Moderate Confidence

VFR with MVFR over the Cape and Islands and periods of light
showers for the East Coast. Very windy with northerly gusts of
25-30 knots inland, and 30-40 knots near the waters.

KBOS Terminal...Low Confidence

VFR with periods of MVFR possible through much of the day as
strato cumulus form over the waters. Winds remain NNW gusting up
to 20 knots today, and up to 30 knots Thursday.

KBDL Terminal...Moderate Confidence

MVFR this morning becoming VFR by afternoon. Gusty NNW winds up
to 20 knots this afternoon and 25 knots Thursday.

Outlook /Friday through Sunday/...

Thursday Night: VFR. Windy with gusts up to 35 kt. Chance SHRA.

Friday: VFR. Windy with gusts up to 35 kt.

Friday Night through Saturday: VFR. Breezy.

Saturday Night: VFR.

Sunday: VFR. Breezy.

&&

.MARINE...
Forecaster Confidence Levels...

Low - less than 30 percent.
Medium - 30 to 60 percent.
High - greater than 60 percent.

Marine

Through Thursday Night

Gusty northwest winds will dominate the coastal waters through
Friday. 20-30 knot winds overnight will gradually increase to 25-35
knots tomorrow afternoon. Seas build to 4 to 7 feet overnight and
increase to 5 to 10 feet tomorrow evening. Seas will be lower off
the south coast in the 3 to 5 foot range.

Outlook /Friday through Sunday/...

Thursday Night: Strong winds with gusts up to 35 kt. Rough seas
up to 11 ft. Chance of rain showers.

Friday: Low risk for gale force winds with gusts up to 35 kt.
Rough seas up to 11 ft.

Friday Night: Moderate risk for Small Craft Advisory winds with
local gusts up to 30 kt. Areas of rough seas.

Saturday: Winds less than 25 kt. Areas of rough seas.

Saturday Night through Sunday: Winds less than 25 kt. Areas of
seas approaching 5 ft.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Gale Warning from 8 AM Thursday to 8 PM EDT Friday for ANZ231-
     232-250-251-254-255.
     Small Craft Advisory from 8 AM Thursday to 8 PM EDT Friday for
     ANZ233-234.
     Small Craft Advisory until 8 PM EDT Friday for ANZ235-237-256.

&&

SYNOPSIS...Frank/RM
NEAR TERM...RM
SHORT TERM...RM
LONG TERM...Frank
AVIATION...Frank/RM
MARINE...Frank/RM