Special Marine Warning: Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM

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Special Marine Warning — Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM Severity: Severe. Certainty: Likely. SMWBOX The National Weather Service in Boston/Norton has issued a * Special Marine Warning for... Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM... * Until 530 AM EDT. * At 427 AM EDT, a severe thunderstorm capable of producing waterspouts was located 44 nm south of The Coastal Waters South Of Nantucket, moving northeast at 30 knots. HAZARD...Waterspouts and wind gusts 34 knots or greater. SOURCE...Radar. IMPACT...Waterspouts can easily overturn boats and create locally hazardous seas. Small craft could be damaged in briefly higher winds and suddenly higher waves. * The severe thunderstorm will remain over mainly open waters.