


Special Marine Warning
Issued by NWS Boston, MA
Issued by NWS Boston, MA
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078 WHUS51 KBOX 171625 SMWBOX ANZ255-256-272-273-171730- /O.NEW.KBOX.MA.W.0023.250717T1625Z-250717T1730Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Special Marine Warning National Weather Service Boston/Norton MA 1225 PM EDT Thu Jul 17 2025 The National Weather Service in Boston/Norton has issued a * Special Marine Warning for... 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... Ocean Waters from Marthas Vineyard to Nantucket from 25 to 45 NM offshore... Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 40 NM offshore... * Until 130 PM EDT. * At 1224 PM EDT, strong thunderstorm were located along a line from about 15 nm southwest of Marthas Vineyard extending south for another 25 nm. The storms were moving to the east at 40 knots. HAZARD...Wind gusts 34 knots or greater. SOURCE...Radar. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. * Locations impacted include... The Coastal Waters South Of Marthas Vineyard, The Coastal Waters South Of Nantucket, and Surfside On Nantucket. PRECAUTIONARY/PREPAREDNESS ACTIONS... Move to safe harbor until hazardous weather passes. Frequent lightning is occurring with this storm. If caught on the open water stay below deck if possible, keep away from ungrounded metal objects. && LAT...LON 4081 7105 4122 7097 4127 7005 4095 6984 TIME...MOT...LOC 1624Z 254DEG 40KT 4103 7089 HAIL...0.00IN WIND...>34KTS $$ NASH