Marine Weather Message
Issued by NWS Boston, MA
Issued by NWS Boston, MA
587 WHUS71 KBOX 210614 MWWBOX URGENT - MARINE WEATHER MESSAGE National Weather Service Boston/Norton MA 214 AM EDT Thu Aug 21 2025 ANZ256-211930- /O.CON.KBOX.GL.W.0026.250821T1200Z-250822T1800Z/ Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 214 AM EDT Thu Aug 21 2025 ...GALE WARNING REMAINS IN EFFECT FROM 8 AM THIS MORNING TO 2 PM EDT FRIDAY... * WHAT...Northeast winds 25 to 35 kt with gusts up to 40 kt and seas 13 to 18 feet expected. * WHERE...Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island. * WHEN...From 8 AM this morning to 2 PM 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. && $$ ANZ233>235-237-211930- /O.CON.KBOX.GL.W.0026.250821T1200Z-250822T1800Z/ Vineyard Sound-Buzzards Bay-Rhode Island Sound-Block Island Sound- 214 AM EDT Thu Aug 21 2025 ...GALE WARNING REMAINS IN EFFECT FROM 8 AM THIS MORNING TO 2 PM EDT FRIDAY... * WHAT...Northeast winds 20 to 30 kt with gusts up to 35 kt and seas 9 to 14 feet expected. * WHERE...In Massachusetts coastal waters, Vineyard Sound and Buzzards Bay. In Rhode Island coastal waters, Rhode Island Sound and Block Island Sound. * WHEN...From 8 AM this morning to 2 PM EDT Friday. * IMPACTS...Strong winds will cause hazardous seas which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions. && $$ ANZ254-255-211930- /O.CON.KBOX.GL.W.0026.250821T1200Z-250823T0000Z/ 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- 214 AM EDT Thu Aug 21 2025 ...GALE WARNING REMAINS IN EFFECT FROM 8 AM THIS MORNING TO 8 PM EDT FRIDAY... * WHAT...Northeast winds 25 to 35 kt with gusts up to 40 kt and seas 12 to 17 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 8 PM 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. && $$ ANZ232-211930- /O.CON.KBOX.GL.W.0026.250821T1800Z-250823T0000Z/ Nantucket Sound- 214 AM EDT Thu Aug 21 2025 ...GALE WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM EDT FRIDAY... * WHAT...Northeast winds 25 to 35 kt with gusts up to 40 kt and seas 6 to 9 feet expected. * WHERE...Nantucket Sound. * WHEN...From 2 PM this afternoon to 8 PM EDT Friday. * IMPACTS...Strong winds will cause hazardous seas which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions. && $$ ANZ231-211930- /O.CON.KBOX.GL.W.0026.250821T1800Z-250823T0000Z/ Cape Cod Bay- 214 AM EDT Thu Aug 21 2025 ...GALE WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM EDT FRIDAY... * WHAT...Northeast winds 20 to 30 kt with gusts up to 35 kt and seas 4 to 6 feet expected. * WHERE...Cape Cod Bay. * WHEN...From 2 PM this afternoon to 8 PM 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. && $$ ANZ250-211930- /O.CON.KBOX.GL.W.0026.250821T1800Z-250823T0000Z/ Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 214 AM EDT Thu Aug 21 2025 ...GALE WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM EDT FRIDAY... * WHAT...Northeast winds 15 to 25 kt with gusts up to 35 kt and seas 7 to 12 feet expected. * WHERE...Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary. * WHEN...From 2 PM this afternoon to 8 PM EDT Friday. * IMPACTS...Strong winds will cause hazardous seas which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions. && $$ ANZ251-211930- /O.CON.KBOX.SC.Y.0086.250821T1800Z-250823T0000Z/ Massachusetts Bay and Ipswich Bay- 214 AM EDT Thu Aug 21 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM EDT FRIDAY... * WHAT...Northeast winds 15 to 25 kt with gusts up to 30 kt and seas 4 to 7 feet expected. * WHERE...Massachusetts Bay and Ipswich Bay. * WHEN...From 2 PM this afternoon to 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. && $$ ANZ236-211930- /O.CON.KBOX.SC.Y.0086.250821T1800Z-250822T1800Z/ Narragansett Bay- 214 AM EDT Thu Aug 21 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 2 PM EDT FRIDAY... * WHAT...Northeast winds 15 to 25 kt with gusts up to 30 kt and waves around 3 feet expected. * WHERE...Narragansett Bay. * WHEN...From 2 PM this afternoon to 2 PM EDT Friday. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ ANZ230-211930- /O.CON.KBOX.SC.Y.0086.250821T1800Z-250822T1800Z/ Boston Harbor- 214 AM EDT Thu Aug 21 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 2 PM EDT FRIDAY... * WHAT...Northeast winds 15 to 20 kt with gusts up to 25 kt and waves 1 to 3 feet expected. * WHERE...Boston Harbor. * WHEN...From 2 PM this afternoon 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. && $$