9/4/2026 4:57:00 AM until 9/4/2026 6:00:00 AM

SMWBOX 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... Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM... * Until 600 AM EDT. * At 457 AM EDT, a strong thunderstorm was located 22 nm southwest of The Coastal Waters South Of Nantucket, moving southeast at 25 knots. HAZARD...Wind gusts 34 knots or greater. SOURCE...Radar. IMPACT...Small craft could be damaged in briefly higher winds and suddenly higher waves. * The strong thunderstorm will remain over mainly open waters.