* WHAT. North winds 10 to 20 kt with gusts up to 30 kt and waves 2 to 3 feet expected. * WHERE. In Massachusetts coastal waters, Boston Harbor. In Rhode Island coastal waters, Narragansett Bay. * WHEN. From 2 AM Friday to 8 AM EDT Saturday. * IMPACTS. Conditions will be hazardous to small craft.

* WHAT. For the High Surf Advisory, large breaking waves expected in the surf zone. For the Coastal Flood Watch, one to two feet of inundation above ground level possible in low-lying areas near shorelines and tidal waterways. * WHERE. Northeast Massachusetts, Eastern Plymouth to the Cape and Nantucket. * WHEN. For the High Surf Advisory, from 7 AM to 7 PM EDT Friday. For the Coastal Flood Watch, from Friday morning through Friday afternoon. * IMPACTS. Some coastal roads become impassable around high tide. Flooding 1 to 2 feet deep affects roads on the North Shore from Salem and Marblehead to Gloucester to Newburyport. Rough surf will cause beach erosion and send and debris onto coastal roads. Many roads near Nantucket Harbor become impassable with 1 to 2 feet of water and affects access to the ferry terminals. This includes Easy Street, South Beach Street, Easton Street, Walsh Street, Willard Street, and Straight Wharf. Roads remain passable. Shallow pockets of flooding less than one foot deep affect low lying areas in Provincetown, mainly near the airport and Race Point Road. In Truro, flooding up to one foot deep affects low lying areas near Pamet Harbor and along the Pamet River. Dangerous swimming and surfing conditions and localized beach erosion. * ADDITIONAL DETAILS. Greatest risk of moderate coastal flooding is along the Plymouth coastline, including the north shore of Cape Cod (Bay side), from Sandwich to Dennis.

* WHAT. For the High Surf Advisory, large breaking waves expected in the surf zone. For the Coastal Flood Watch, one to two feet of inundation above ground level possible in low-lying areas near shorelines and tidal waterways. * WHERE. Northeast Massachusetts, Eastern Plymouth to the Cape and Nantucket. * WHEN. For the High Surf Advisory, from 7 AM to 7 PM EDT Friday. For the Coastal Flood Watch, from Friday morning through Friday afternoon. * IMPACTS. Some coastal roads become impassable around high tide. Flooding 1 to 2 feet deep affects roads on the North Shore from Salem and Marblehead to Gloucester to Newburyport. Rough surf will cause beach erosion and send and debris onto coastal roads. Many roads near Nantucket Harbor become impassable with 1 to 2 feet of water and affects access to the ferry terminals. This includes Easy Street, South Beach Street, Easton Street, Walsh Street, Willard Street, and Straight Wharf. Roads remain passable. Shallow pockets of flooding less than one foot deep affect low lying areas in Provincetown, mainly near the airport and Race Point Road. In Truro, flooding up to one foot deep affects low lying areas near Pamet Harbor and along the Pamet River. Dangerous swimming and surfing conditions and localized beach erosion. * ADDITIONAL DETAILS. Greatest risk of moderate coastal flooding is along the Plymouth coastline, including the north shore of Cape Cod (Bay side), from Sandwich to Dennis.

* WHAT. Dangerous rip currents. * WHERE. Coastal Rhode Island. * WHEN. Through Friday evening. * IMPACTS. Rip currents can sweep even the best swimmers away from shore into deeper water.

* WHAT. One to two feet of inundation above ground level possible in low-lying areas near shorelines and tidal waterways. * WHERE. Boston area. * WHEN. From Friday morning through Friday afternoon. * IMPACTS. Some vulnerable coastal roads become impassable around high tide. Flooding 1 to 2 feet deep affects some coastal roads and low lying areas from Revere and Winthrop through Boston to Hull, Braintree, and Quincy. Splashover and debris may wash onto coastal roads when large waves occur.

* WHAT. Dangerous rip currents. * WHERE. Washington, and Newport RI Counties. * WHEN. Through this evening. * IMPACTS. Rip currents can sweep even the best swimmers away from shore into deeper water.

COASTAL FLOOD ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 6 PM EDT THIS EVENING. . COASTAL FLOOD ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 5 AM EDT SATURDAY. . COASTAL FLOOD ADVISORY IN EFFECT FROM 11 AM TO 5 PM EDT SATURDAY. * WHAT. For the High Surf Advisory, large breaking expected in the surf zone. For the Friday afternoon Coastal Flood Advisory, one to two feet of inundation above ground level expected in low- lying areas near shorelines and tidal waterways (4.2 to 13.9 feet Mean Lower Low Water). For the Friday night Coastal Flood Advisory, up to one foot of inundation above ground level expected in low- lying areas near shorelines and tidal waterways (3.9 to 13.3 feet Mean Lower Low Water). For the Saturday afternoon Coastal Flood Advisory, one to two feet of inundation above ground level expected in low-lying areas near shorelines and tidal waterways (4.3 to 13.9 feet Mean Lower Low Water). * WHERE. Eastern Essex MA, Eastern Plymouth MA, Barnstable MA and Nantucket MA Counties. * WHEN. For the High Surf Advisory, from 7 AM this morning to 7 PM EDT this evening. For the first Coastal Flood Advisory, from 11 AM this morning to 6 PM EDT this evening. For the second Coastal Flood Advisory, from 11 PM this evening to 5 AM EDT Saturday. For the third Coastal Flood Advisory, from 11 AM to 5 PM EDT Saturday. * IMPACTS. Most roads remain passable. Flooding up to one foot deep affects coastal roads on the North Shore from Salem to Gloucester and Newburyport. Rough surf will cause flooding on some coastal roads around the time of high tide due to splashover. Roads remain passable. Low lying areas and roads near Nantucket Harbor, including Easy Street, may experience pockets of shallow flooding less than one foot deep. Roads remain passable. Shallow pockets of flooding less than one foot deep affect low lying areas in Provincetown, mainly near the airport and Race Point Road. In Truro, flooding up to one foot deep affects low lying areas near Pamet Harbor and along the Pamet River. Dangerous swimming and surfing conditions and localized beach erosion.

COASTAL FLOOD ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 6 PM EDT THIS EVENING. . COASTAL FLOOD ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 5 AM EDT SATURDAY. . COASTAL FLOOD ADVISORY IN EFFECT FROM 11 AM TO 5 PM EDT SATURDAY. * WHAT. For the High Surf Advisory, large breaking expected in the surf zone. For the Friday afternoon Coastal Flood Advisory, one to two feet of inundation above ground level expected in low- lying areas near shorelines and tidal waterways (4.2 to 13.9 feet Mean Lower Low Water). For the Friday night Coastal Flood Advisory, up to one foot of inundation above ground level expected in low- lying areas near shorelines and tidal waterways (3.9 to 13.3 feet Mean Lower Low Water). For the Saturday afternoon Coastal Flood Advisory, one to two feet of inundation above ground level expected in low-lying areas near shorelines and tidal waterways (4.3 to 13.9 feet Mean Lower Low Water). * WHERE. Eastern Essex MA, Eastern Plymouth MA, Barnstable MA and Nantucket MA Counties. * WHEN. For the High Surf Advisory, from 7 AM this morning to 7 PM EDT this evening. For the first Coastal Flood Advisory, from 11 AM this morning to 6 PM EDT this evening. For the second Coastal Flood Advisory, from 11 PM this evening to 5 AM EDT Saturday. For the third Coastal Flood Advisory, from 11 AM to 5 PM EDT Saturday. * IMPACTS. Most roads remain passable. Flooding up to one foot deep affects coastal roads on the North Shore from Salem to Gloucester and Newburyport. Rough surf will cause flooding on some coastal roads around the time of high tide due to splashover. Roads remain passable. Low lying areas and roads near Nantucket Harbor, including Easy Street, may experience pockets of shallow flooding less than one foot deep. Roads remain passable. Shallow pockets of flooding less than one foot deep affect low lying areas in Provincetown, mainly near the airport and Race Point Road. In Truro, flooding up to one foot deep affects low lying areas near Pamet Harbor and along the Pamet River. Dangerous swimming and surfing conditions and localized beach erosion.

* WHAT. For the Friday afternoon Coastal Flood Advisory, up to one foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways (13.0 to 13.1 feet Mean Lower Low Water). For the Friday night Coastal Flood Advisory, up to one half foot of inundation above ground level expected in low- lying areas near shorelines and tidal waterways (12.5 to 12.6 feet Mean Lower Low Water). For the Saturday afternoon Coastal Flood Advisory, up to one foot of inundation above ground level expected in low- lying areas near shorelines and tidal waterways (12.9 to 13.1 feet Mean Lower Low Water). * WHERE. Suffolk MA and Eastern Norfolk MA Counties. * WHEN. For the first Coastal Flood Advisory, from 11 AM this morning to 6 PM EDT this evening. For the second Coastal Flood Advisory, from 11 PM this evening to 5 AM EDT Saturday. For the third Coastal Flood Advisory, from 11 AM to 5 PM EDT Saturday. * IMPACTS. Shallow pockets of flooding less than one foot deep affects the lowest lying areas along the coast, including Morrissey Boulevard in Boston.

* WHAT. North winds 15 to 20 kt with gusts up to 30 kt and waves 2 to 3 feet. * WHERE. In Massachusetts coastal waters, Boston Harbor. In Rhode Island coastal waters, Narragansett Bay. * WHEN. Until 8 AM EDT Saturday. * IMPACTS. Conditions will be hazardous to small craft.