Marine Weather Message
Issued by NWS Boston, MA
Issued by NWS Boston, MA
571 WHUS71 KBOX 180918 MWWBOX URGENT - MARINE WEATHER MESSAGE National Weather Service Boston/Norton MA 418 AM EST Tue Nov 18 2025 ANZ230-236-181800- /O.EXT.KBOX.SC.Y.0117.000000T0000Z-251118T1800Z/ Boston Harbor-Narragansett Bay- 418 AM EST Tue Nov 18 2025 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... * WHAT...West winds 15 to 25 kt and waves 1 to 3 feet. * WHERE...In Massachusetts coastal waters, Boston Harbor. In Rhode Island coastal waters, Narragansett Bay. * WHEN...Until 1 PM EST 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. && $$ ANZ231-251-181800- /O.EXT.KBOX.SC.Y.0117.000000T0000Z-251118T1800Z/ Cape Cod Bay-Massachusetts Bay and Ipswich Bay- 418 AM EST Tue Nov 18 2025 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... * WHAT...West winds 15 to 25 kt with gusts up to 25 kt and seas around 3 feet. * WHERE...Cape Cod Bay and Massachusetts Bay and Ipswich Bay. * WHEN...Until 1 PM EST this afternoon. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ ANZ233-234-181800- /O.EXT.KBOX.SC.Y.0117.000000T0000Z-251118T1800Z/ Vineyard Sound-Buzzards Bay- 418 AM EST Tue Nov 18 2025 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... * WHAT...West winds 15 to 25 kt with gusts up to 25 kt and seas around 3 feet. * WHERE...Vineyard Sound and Buzzards Bay. * WHEN...Until 1 PM EST 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. && $$ ANZ235-237-181800- /O.CON.KBOX.SC.Y.0117.000000T0000Z-251118T1800Z/ Rhode Island Sound-Block Island Sound- 418 AM EST Tue Nov 18 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... * WHAT...West winds 15 to 25 kt and seas 3 to 4 feet. * WHERE...Rhode Island Sound and Block Island Sound. * WHEN...Until 1 PM EST this afternoon. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ ANZ232-181800- /O.CON.KBOX.SC.Y.0117.000000T0000Z-251118T1800Z/ Nantucket Sound- 418 AM EST Tue Nov 18 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST THIS AFTERNOON... * WHAT...West winds 15 to 25 kt and seas around 3 feet. * WHERE...Nantucket Sound. * WHEN...Until 1 PM EST 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. && $$ ANZ250-254-182230- /O.CON.KBOX.SC.Y.0117.000000T0000Z-251119T0000Z/ Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 418 AM EST Tue Nov 18 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM EST THIS EVENING... * WHAT...West winds 15 to 25 kt with gusts up to 30 kt and seas 4 to 6 feet. * WHERE...Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary and Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm. * WHEN...Until 7 PM EST this evening. * IMPACTS...Conditions will be hazardous to small craft. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in hazardous conditions. && $$ ANZ255-256-182230- /O.CON.KBOX.SC.Y.0117.000000T0000Z-251119T0000Z/ 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- 418 AM EST Tue Nov 18 2025 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 7 PM EST THIS EVENING... * WHAT...West winds 15 to 25 kt with gusts up to 30 kt and seas 4 to 7 feet. * WHERE...In Massachusetts coastal waters, 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 7 PM EST 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. && $$