323  
WHUS71 KBOX 211831  
MWWBOX  
 
URGENT - MARINE WEATHER MESSAGE  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
231 PM EDT TUE JUL 21 2026  
 
ANZ250-254>256-220745-  
/O.CON.KBOX.SC.Y.0075.260722T0000Z-260723T0000Z/  
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-  
231 PM EDT TUE JUL 21 2026  
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING  
TO 8 PM EDT WEDNESDAY...  
 
* WHAT...SOUTH WINDS 15 TO 25 KT WITH GUSTS UP TO 30 KT AND SEAS  
6 TO 9 FEET EXPECTED.  
 
* 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...FROM 8 PM THIS EVENING TO 8 PM EDT WEDNESDAY.  
 
* 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>235-237-220745-  
/O.CON.KBOX.SC.Y.0075.260722T0000Z-260723T0000Z/  
NANTUCKET SOUND-VINEYARD SOUND-BUZZARDS BAY-RHODE ISLAND SOUND-  
BLOCK ISLAND SOUND-  
231 PM EDT TUE JUL 21 2026  
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING  
TO 8 PM EDT WEDNESDAY...  
 
* WHAT...SOUTHWEST WINDS 15 TO 25 KT WITH GUSTS UP TO 30 KT AND  
SEAS 4 TO 7 FEET EXPECTED.  
 
* WHERE...IN MASSACHUSETTS COASTAL WATERS, NANTUCKET SOUND,  
VINEYARD SOUND AND BUZZARDS BAY. IN RHODE ISLAND COASTAL  
WATERS, RHODE ISLAND SOUND AND BLOCK ISLAND SOUND.  
 
* WHEN...FROM 8 PM THIS EVENING TO 8 PM EDT WEDNESDAY.  
 
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER  
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.  
 

 
 

 
 
ANZ231-220745-  
/O.CON.KBOX.SC.Y.0075.260722T0000Z-260723T0000Z/  
CAPE COD BAY-  
231 PM EDT TUE JUL 21 2026  
 
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING  
TO 8 PM EDT WEDNESDAY...  
 
* WHAT...SOUTH WINDS 15 TO 20 KT WITH GUSTS UP TO 30 KT AND SEAS  
AROUND 3 FEET EXPECTED.  
 
* WHERE...CAPE COD BAY.  
 
* WHEN...FROM 8 PM THIS EVENING TO 8 PM EDT WEDNESDAY.  
 
* IMPACTS...CONDITIONS WILL BE HAZARDOUS TO SMALL CRAFT.  
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...  
 
INEXPERIENCED MARINERS, ESPECIALLY THOSE OPERATING SMALLER  
VESSELS, SHOULD AVOID NAVIGATING IN HAZARDOUS CONDITIONS.  
 

 
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab MA Page
The Nexlab RI Page
The Nexlab NH Page
The Nexlab CT Page Main Text Page