SMWBOX The National Weather Service in Boston/Norton has issued a * Special Marine Warning for. Narragansett Bay. * Until 1015 PM EDT. * At 914 PM EDT, strong thunderstorms were located along a line extending from 19 nm west of Cranston to 9 nm northwest of Westerly, moving east at 30 knots. HAZARD. Wind gusts to 40 knots. SOURCE. Radar. IMPACT. Small craft could be damaged in briefly higher winds and suddenly higher waves. Strong winds will occur several miles out ahead of the approaching thunderstorms. * Locations impacted include. Dutch Harbor Light, Quonset Point, Melville, Greenwich Bay, Popasquash Point, Warwick Light, Bristol Harbor, Mount Hope Bay, Plum Beach Light, and Conimicut Light.

* WHAT. Southwest winds 10 to 20 kt with gusts up to 30 kt and waves 3 to 5 feet. * WHERE. Narragansett Bay. * WHEN. Until 9 AM EDT Monday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. South winds 15 to 20 kt with gusts up to 25 kt and waves around 2 feet. * WHERE. Boston Harbor. * WHEN. Until 11 PM EDT this evening. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. Large breaking waves of 4 to 10 feet in the surf zone. * WHERE. Washington, Southern Bristol MA, Southern Plymouth MA, Barnstable MA, Dukes MA, Nantucket MA, and Newport RI Counties. * WHEN. Until 7 PM EDT Monday. * IMPACTS. Dangerous swimming and surfing conditions and localized beach erosion.