080
WHUS71 KBOX 172006
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
406 PM EDT Sun Aug 17 2025

ANZ230-180915-
/O.EXA.KBOX.SC.Y.0084.250818T0200Z-250819T0000Z/
Boston Harbor-
406 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 8 PM
EDT MONDAY...

* WHAT...Northeast winds 10 to 20 kt with gusts up to 25 kt and
  waves 1 to 3 feet expected.

* WHERE...Boston Harbor.

* WHEN...From 10 PM this evening 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.

&&

$$

ANZ254>256-180915-
/O.EXT.KBOX.SC.Y.0084.250818T0400Z-250820T0000Z/
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-
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
406 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY NOW IN EFFECT FROM MIDNIGHT TONIGHT TO
8 PM EDT TUESDAY...

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

* WHERE...In Massachusetts coastal waters, 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. In Rhode Island coastal waters,
  Coastal Waters from Montauk NY to Marthas Vineyard extending
  out to 20 nm South of Block Island.

* WHEN...From midnight tonight to 8 PM 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.

&&

$$

ANZ231>235-237-180915-
/O.CON.KBOX.SC.Y.0084.000000T0000Z-250818T2000Z/
Cape Cod Bay-Nantucket Sound-Vineyard Sound-Buzzards Bay-
Rhode Island Sound-Block Island Sound-
406 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 4 PM EDT MONDAY...

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

* WHERE...Portions of Massachusetts coastal waters and Rhode
  Island coastal waters.

* WHEN...Until 4 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.

&&

$$

ANZ250-251-180915-
/O.CON.KBOX.SC.Y.0084.250818T0200Z-250819T0000Z/
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-Massachusetts Bay and Ipswich Bay-
406 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 PM THIS EVENING
TO 8 PM EDT MONDAY...

* WHAT...Northeast winds 15 to 25 kt with gusts up to 30 kt and
  seas 4 to 7 feet expected.

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

* WHEN...From 10 PM this evening 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.

&&

$$

ANZ236-172300-
/O.CON.KBOX.SC.Y.0084.000000T0000Z-250817T2300Z/
Narragansett Bay-
406 PM EDT Sun Aug 17 2025

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM EDT THIS
EVENING...

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

* WHERE...Narragansett Bay.

* WHEN...Until 7 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.

&&

$$