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Small Craft Advisory 0055
Issued by the Boston Forecast Office

Action Issued Starts Expiration
Time Extended 2026-05-16 12:49:24 2026-05-17 13:00:00
Time Extended 2026-05-16 23:50:44 2026-05-17 16:00:00
Cancelled 2026-05-17 13:48:54 2026-05-17 16:00:00


Action: Time Extended
Issued At: 2026-05-16 12:49:24

404 
WHUS71 KBOX 161749
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
149 PM EDT Sat May 16 2026

ANZ250-254>256-170700-
/O.EXT.KBOX.SC.Y.0055.000000T0000Z-260517T1800Z/
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
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-
149 PM EDT Sat May 16 2026

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 2 PM EDT SUNDAY...

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

* WHERE...In Massachusetts coastal waters, Coastal waters east 
  of Ipswich Bay and the Stellwagen Bank National Marine 
  Sanctuary, 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...Until 2 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.

&&

$$

ANZ235-237-251-170600-
/O.CON.KBOX.SC.Y.0055.000000T0000Z-260517T0600Z/
Rhode Island Sound-Block Island Sound-
Massachusetts Bay and Ipswich Bay-
149 PM EDT Sat May 16 2026

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 AM EDT SUNDAY...

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

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

* WHEN...Until 2 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>234-170000-
/O.CON.KBOX.SC.Y.0055.000000T0000Z-260517T0000Z/
Cape Cod Bay-Nantucket Sound-Vineyard Sound-Buzzards Bay-
149 PM EDT Sat May 16 2026

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

* WHAT...Southwest winds 15 to 20 kt with gusts up to 25 kt and
  seas around 3 to 5 feet.

* WHERE...Cape Cod Bay, Nantucket Sound, Vineyard Sound and 
  Buzzards 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.

&&

$$


Action: Time Extended
Issued At: 2026-05-16 23:50:44

910 
WHUS71 KBOX 170450
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
1250 AM EDT Sun May 17 2026

ANZ231>234-170900-
/O.NEW.KBOX.SC.Y.0056.260517T0450Z-260517T0900Z/
Cape Cod Bay-Nantucket Sound-Vineyard Sound-Buzzards Bay-
1250 AM EDT Sun May 17 2026

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 5 AM EDT EARLY THIS
MORNING...

* WHAT...Southwest winds 15 to 20 kt with gusts up to 25 kt and 
  seas 3 to 4 feet.

* WHERE...Cape Cod Bay, Nantucket Sound, Vineyard Sound and 
  Buzzards Bay.

* WHEN...Until 5 AM EDT early this morning.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

ANZ250-171200-
/O.EXT.KBOX.SC.Y.0055.000000T0000Z-260517T1200Z/
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1250 AM EDT Sun May 17 2026

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 8 AM EDT THIS
MORNING...

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

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

* WHEN...Until 8 AM EDT this morning.

* 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>256-172000-
/O.EXT.KBOX.SC.Y.0055.000000T0000Z-260517T2100Z/
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-
1250 AM EDT Sun May 17 2026

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 5 PM EDT THIS
AFTERNOON...

* WHAT...Southwest winds 15 to 20 kt with gusts up to 25 kt and 
  seas 4 to 6 feet.

* 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...Until 5 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.

&&

$$

ANZ235-237-171200-
/O.EXT.KBOX.SC.Y.0055.000000T0000Z-260517T1200Z/
Rhode Island Sound-Block Island Sound-
1250 AM EDT Sun May 17 2026

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 8 AM EDT THIS
MORNING...

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

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

* WHEN...Until 8 AM EDT this morning.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$

ANZ251-170900-
/O.EXT.KBOX.SC.Y.0055.000000T0000Z-260517T0900Z/
Massachusetts Bay and Ipswich Bay-
1250 AM EDT Sun May 17 2026

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 5 AM EDT EARLY THIS
MORNING...

* WHAT...Southwest winds 15 to 20 kt with gusts up to 25 kt and 
  seas 2 to 4 feet.

* WHERE...Massachusetts Bay and Ipswich Bay.

* WHEN...Until 5 AM EDT early this morning.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

$$


Action: Cancelled
Issued At: 2026-05-17 13:48:54

301 
WHUS71 KBOX 171848
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
248 PM EDT Sun May 17 2026

ANZ254>256-172000-
/O.CAN.KBOX.SC.Y.0055.000000T0000Z-260517T2100Z/
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-
248 PM EDT Sun May 17 2026

...SMALL CRAFT ADVISORY IS CANCELLED...

Winds and seas have fallen below SCY criteria, therefore the SCY
is cancelled.

$$



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