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Home Return to list Ice Accretion Watch 0001 Issued by the Boston Forecast Office
Action: Time Extended Issued At: 2026-02-05 11:09:47 816 WHUS71 KBOX 051709 MWWBOX URGENT - MARINE WEATHER MESSAGE National Weather Service Boston/Norton MA 1209 PM EST Thu Feb 5 2026 ANZ231>235-237-250-251-254>256-061000- /O.CON.KBOX.GL.A.0007.260207T1800Z-260208T1800Z/ /O.EXT.KBOX.UP.A.0001.260207T2100Z-260209T1200Z/ Cape Cod Bay-Nantucket Sound-Vineyard Sound-Buzzards Bay- Rhode Island Sound-Block Island Sound- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary-Massachusetts Bay and Ipswich Bay- 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- 1209 PM EST Thu Feb 5 2026 ...GALE WATCH REMAINS IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY AFTERNOON... ...HEAVY FREEZING SPRAY WATCH NOW IN EFFECT FROM SATURDAY AFTERNOON THROUGH MONDAY MORNING... * WHAT...For the Gale Watch, north winds 25 to 35 kt with gusts up to 40 kt and seas 7 to 10 feet possible. For the Heavy Freezing Spray Watch, heavy freezing spray at a rate of 2 cm per hour or greater possible, and may rapidly accumulate on vessels. * WHERE...Portions of Massachusetts coastal waters and Rhode Island coastal waters. * WHEN...For the Gale Watch, from Saturday afternoon through Sunday afternoon. For the Heavy Freezing Spray Watch, from Saturday afternoon through Monday morning. * IMPACTS...Operating a vessel in heavy freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Rapid ice accretion on decks and superstructures may result in a catastrophic loss of stability. 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 or mitigate hazardous accumulation of ice on their vessel. During freezing spray conditions, the U.S. Coast Guard advises mariners to check and ensure all life-saving devices remain free of ice. 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. && $$ ANZ236-061000- /O.EXT.KBOX.UP.A.0001.260207T2100Z-260209T1200Z/ Narragansett Bay- 1209 PM EST Thu Feb 5 2026 ...HEAVY FREEZING SPRAY WATCH NOW IN EFFECT FROM SATURDAY AFTERNOON THROUGH MONDAY MORNING... * WHAT...Heavy freezing spray at a rate of 2 cm per hour or greater possible, and may rapidly accumulate on vessels. * WHERE...Narragansett Bay. * WHEN...From Saturday afternoon through Monday morning. * IMPACTS...Operating a vessel in heavy freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Rapid ice accretion on decks and superstructures may result in a catastrophic loss of stability. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid or mitigate hazardous accumulation of ice on their vessel. During freezing spray conditions, the U.S. Coast Guard advises mariners to check and ensure all life-saving devices remain free of ice. && $$ Action: Time Extended Issued At: 2026-02-05 11:09:47 816 WHUS71 KBOX 051709 MWWBOX URGENT - MARINE WEATHER MESSAGE National Weather Service Boston/Norton MA 1209 PM EST Thu Feb 5 2026 ANZ231>235-237-250-251-254>256-061000- /O.CON.KBOX.GL.A.0007.260207T1800Z-260208T1800Z/ /O.EXT.KBOX.UP.A.0001.260207T2100Z-260209T1200Z/ Cape Cod Bay-Nantucket Sound-Vineyard Sound-Buzzards Bay- Rhode Island Sound-Block Island Sound- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary-Massachusetts Bay and Ipswich Bay- 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- 1209 PM EST Thu Feb 5 2026 ...GALE WATCH REMAINS IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY AFTERNOON... ...HEAVY FREEZING SPRAY WATCH NOW IN EFFECT FROM SATURDAY AFTERNOON THROUGH MONDAY MORNING... * WHAT...For the Gale Watch, north winds 25 to 35 kt with gusts up to 40 kt and seas 7 to 10 feet possible. For the Heavy Freezing Spray Watch, heavy freezing spray at a rate of 2 cm per hour or greater possible, and may rapidly accumulate on vessels. * WHERE...Portions of Massachusetts coastal waters and Rhode Island coastal waters. * WHEN...For the Gale Watch, from Saturday afternoon through Sunday afternoon. For the Heavy Freezing Spray Watch, from Saturday afternoon through Monday morning. * IMPACTS...Operating a vessel in heavy freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Rapid ice accretion on decks and superstructures may result in a catastrophic loss of stability. 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 or mitigate hazardous accumulation of ice on their vessel. During freezing spray conditions, the U.S. Coast Guard advises mariners to check and ensure all life-saving devices remain free of ice. 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. && $$ ANZ236-061000- /O.EXT.KBOX.UP.A.0001.260207T2100Z-260209T1200Z/ Narragansett Bay- 1209 PM EST Thu Feb 5 2026 ...HEAVY FREEZING SPRAY WATCH NOW IN EFFECT FROM SATURDAY AFTERNOON THROUGH MONDAY MORNING... * WHAT...Heavy freezing spray at a rate of 2 cm per hour or greater possible, and may rapidly accumulate on vessels. * WHERE...Narragansett Bay. * WHEN...From Saturday afternoon through Monday morning. * IMPACTS...Operating a vessel in heavy freezing spray is hazardous. Freezing spray may render mechanical and electronic components inoperative. Rapid ice accretion on decks and superstructures may result in a catastrophic loss of stability. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should consider altering plans to avoid or mitigate hazardous accumulation of ice on their vessel. During freezing spray conditions, the U.S. Coast Guard advises mariners to check and ensure all life-saving devices remain free of ice. && $$ | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||