Marine Weather Message
Issued by NWS Boston, MA
Issued by NWS Boston, MA
804 WHUS71 KBOX 200620 MWWBOX URGENT - MARINE WEATHER MESSAGE National Weather Service Boston/Norton MA 220 AM EDT Wed Aug 20 2025 ANZ254-255-202000- /O.CON.KBOX.SC.Y.0084.000000T0000Z-250821T1200Z/ /O.CON.KBOX.GL.A.0014.250821T1200Z-250823T0500Z/ 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- 220 AM EDT Wed Aug 20 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THURSDAY... ...GALE WATCH REMAINS IN EFFECT FROM THURSDAY MORNING THROUGH LATE FRIDAY NIGHT... * WHAT...For the Small Craft Advisory, east winds 15 to 25 kt with gusts up to 30 kt and seas 6 to 9 feet. For the Gale Watch, northeast winds 25 to 35 kt with gusts up to 45 kt and seas 11 to 16 feet possible. * WHERE...Coastal waters from Provincetown to Chatham to Nantucket MA out 20 nm and Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket. * WHEN...For the Small Craft Advisory, until 8 AM EDT Thursday. For the Gale Watch, from Thursday morning through late Friday night. * IMPACTS...Strong winds can cause hazardous seas which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and seas. && $$ ANZ256-202000- /O.CON.KBOX.SC.Y.0084.000000T0000Z-250821T1200Z/ /O.CON.KBOX.GL.A.0014.250821T1200Z-250822T1800Z/ Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 220 AM EDT Wed Aug 20 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT THURSDAY... ...GALE WATCH REMAINS IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY AFTERNOON... * WHAT...For the Small Craft Advisory, east winds 15 to 25 kt with gusts up to 30 kt and seas 7 to 10 feet. For the Gale Watch, northeast winds 25 to 35 kt with gusts up to 45 kt and seas 12 to 17 feet possible. * WHERE...Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island. * WHEN...For the Small Craft Advisory, until 8 AM EDT Thursday. For the Gale Watch, from Thursday morning through Friday afternoon. * IMPACTS...Strong winds can cause hazardous seas which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and seas. && $$ ANZ233>235-237-202000- /O.CON.KBOX.GL.A.0014.250821T1200Z-250822T1800Z/ Vineyard Sound-Buzzards Bay-Rhode Island Sound-Block Island Sound- 220 AM EDT Wed Aug 20 2025 ...GALE WATCH REMAINS IN EFFECT FROM THURSDAY MORNING THROUGH FRIDAY AFTERNOON... * WHAT...Northeast winds 20 to 30 kt with gusts up to 40 kt and seas 8 to 13 feet possible. * WHERE...In Massachusetts coastal waters, Vineyard Sound and Buzzards Bay. In Rhode Island coastal waters, Rhode Island Sound and Block Island Sound. * WHEN...From Thursday morning through Friday afternoon. * IMPACTS...Strong winds can cause hazardous seas which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and seas. && $$ ANZ232-202000- /O.CON.KBOX.GL.A.0014.250821T1200Z-250823T0500Z/ Nantucket Sound- 220 AM EDT Wed Aug 20 2025 ...GALE WATCH REMAINS IN EFFECT FROM THURSDAY MORNING THROUGH LATE FRIDAY NIGHT... * WHAT...Northeast winds 25 to 35 kt with gusts up to 40 kt and seas 6 to 9 feet possible. * WHERE...Nantucket Sound. * WHEN...From Thursday morning through late Friday night. * IMPACTS...Strong winds can cause hazardous seas which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and seas. && $$ ANZ231-202000- /O.CON.KBOX.GL.A.0014.250821T1200Z-250823T0500Z/ Cape Cod Bay- 220 AM EDT Wed Aug 20 2025 ...GALE WATCH REMAINS IN EFFECT FROM THURSDAY MORNING THROUGH LATE FRIDAY NIGHT... * WHAT...Northeast winds 20 to 30 kt with gusts up to 40 kt and seas 4 to 6 feet possible. * WHERE...Cape Cod Bay. * WHEN...From Thursday morning through late Friday night. * IMPACTS...Strong winds can cause hazardous seas which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid possible hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for severe wind and seas. && $$