Alert archive / Massachusetts / Small Craft Advisories in 2018
Small Craft Advisory 62, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this small craft advisory at Apr 19, 2018, 4:01 AM EDT. It took effect at Apr 19, 2018, 9:00 PM EDT. It was in force for 29 hr.
The area
The counties it named.
The facts
- Issued
- Apr 19, 2018, 4:01 AM EDT (08:01 UTC)
- In effect from
- Apr 19, 2018, 9:00 PM EDT
- Expired
- Apr 21, 2018, 2:00 AM EDT
- In force
- 29 hr
- Issued by
- NWS Boston/Norton, MA
The text
As transmitted.
845 WHUS71 KBOX 190801 MWWBOX URGENT - MARINE WEATHER MESSAGE National Weather Service Boston/Norton MA 401 AM EDT Thu Apr 19 2018 ANZ254>256-191615- /O.CAN.KBOX.SC.Y.0059.000000T0000Z-180419T1000Z/ /O.NEW.KBOX.SC.Y.0062.180420T0100Z-180421T0000Z/ Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 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- 401 AM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 8 PM EDT FRIDAY... ...SMALL CRAFT ADVISORY IS CANCELLED... The National Weather Service in Boston/Norton has issued a Small Craft Advisory, which is in effect from 9 PM this evening to 8 PM EDT Friday. The earlier Small Craft Advisory has been cancelled. * WINDS AND SEAS...Northwest winds 10 to 20 kt with gusts up to 30 kt. Seas 3 to 6 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ250-191615- /O.NEW.KBOX.SC.Y.0062.180420T0400Z-180420T1900Z/ Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 401 AM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 3 PM EDT FRIDAY... The National Weather Service in Boston/Norton has issued a Small Craft Advisory, which is in effect from midnight tonight to 3 PM EDT Friday. * WINDS AND SEAS...Northwest winds 5 to 15 kt with gusts up to 25 kt. Seas 2 to 4 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ251-191615- /O.NEW.KBOX.SC.Y.0062.180420T0600Z-180420T1900Z/ Massachusetts Bay and Ipswich Bay- 401 AM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM TO 3 PM EDT FRIDAY... The National Weather Service in Boston/Norton has issued a Small Craft Advisory, which is in effect from 2 AM to 3 PM EDT Friday. * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ231>234-191615- /O.NEW.KBOX.SC.Y.0062.180420T0600Z-180420T1900Z/ Cape Cod Bay-Nantucket Sound-Vineyard Sound-Buzzards Bay- 401 AM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM 2 AM TO 3 PM EDT FRIDAY... The National Weather Service in Boston/Norton has issued a Small Craft Advisory, which is in effect from 2 AM to 3 PM EDT Friday. * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ235-237-191615- /O.NEW.KBOX.SC.Y.0062.180420T0100Z-180420T1900Z/ Rhode Island Sound-Block Island Sound- 401 AM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO 3 PM EDT FRIDAY... The National Weather Service in Boston/Norton has issued a Small Craft Advisory, which is in effect from 9 PM this evening to 3 PM EDT Friday. * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ230-191615- /O.NEW.KBOX.SC.Y.0062.180420T0800Z-180420T2200Z/ Boston Harbor- 401 AM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM TO 6 PM EDT FRIDAY... The National Weather Service in Boston/Norton has issued a Small Craft Advisory, which is in effect from 4 AM to 6 PM EDT Friday. * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ236-191615- /O.NEW.KBOX.SC.Y.0062.180420T0800Z-180420T1900Z/ Narragansett Bay- 401 AM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY IN EFFECT FROM 4 AM TO 3 PM EDT FRIDAY... The National Weather Service in Boston/Norton has issued a Small Craft Advisory, which is in effect from 4 AM to 3 PM EDT Friday. * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston
9 follow-up statements
142 WHUS71 KBOX 191818 MWWBOX URGENT - MARINE WEATHER MESSAGE National Weather Service Boston/Norton MA 218 PM EDT Thu Apr 19 2018 ANZ250-200230- /O.CON.KBOX.SC.Y.0062.180420T0400Z-180420T1900Z/ Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 218 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM MIDNIGHT TONIGHT TO 3 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 5 to 15 kt with gusts up to 25 kt. Seas 2 to 4 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ254>256-200230- /O.CON.KBOX.SC.Y.0062.180420T0100Z-180421T0000Z/ Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 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- 218 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 8 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 10 to 20 kt with gusts up to 30 kt. Seas 3 to 6 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ251-200230- /O.CON.KBOX.SC.Y.0062.180420T0600Z-180420T1900Z/ Massachusetts Bay and Ipswich Bay- 218 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 AM TO 3 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ231>234-200230- /O.CON.KBOX.SC.Y.0062.180420T0600Z-180420T1900Z/ Cape Cod Bay-Nantucket Sound-Vineyard Sound-Buzzards Bay- 218 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 AM TO 3 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ235-237-200230- /O.CON.KBOX.SC.Y.0062.180420T0100Z-180420T1900Z/ Rhode Island Sound-Block Island Sound- 218 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 3 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ230-200230- /O.CON.KBOX.SC.Y.0062.180420T0800Z-180420T2200Z/ Boston Harbor- 218 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 4 AM TO 6 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ236-200230- /O.CON.KBOX.SC.Y.0062.180420T0800Z-180420T1900Z/ Narragansett Bay- 218 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 4 AM TO 3 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston
048 WHUS71 KBOX 191954 MWWBOX URGENT - MARINE WEATHER MESSAGE National Weather Service Boston/Norton MA 354 PM EDT Thu Apr 19 2018 ANZ250-200400- /O.EXT.KBOX.SC.Y.0062.180420T0400Z-180420T2200Z/ Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 354 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY NOW IN EFFECT FROM MIDNIGHT TONIGHT TO 6 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 10 to 20 kt with gusts up to 25 kt. Seas 3 to 6 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ235-237-200400- /O.EXT.KBOX.SC.Y.0062.180420T0100Z-180420T2100Z/ Rhode Island Sound-Block Island Sound- 354 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 9 PM THIS EVENING TO 5 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 6 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ236-200400- /O.EXT.KBOX.SC.Y.0062.180420T0800Z-180420T1500Z/ Narragansett Bay- 354 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 4 AM TO 11 AM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ254>256-200400- /O.CON.KBOX.SC.Y.0062.180420T0100Z-180421T0000Z/ Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 354 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 9 PM THIS EVENING TO 8 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 10 to 20 kt with gusts up to 30 kt. Seas 5 to 8 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ251-200400- /O.CON.KBOX.SC.Y.0062.180420T0600Z-180420T1900Z/ Massachusetts Bay and Ipswich Bay- 354 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 AM TO 3 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 10 to 20 kt with gusts up to 25 kt. Seas 2 to 4 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ231>234-200400- /O.CON.KBOX.SC.Y.0062.180420T0600Z-180420T1900Z/ Cape Cod Bay-Nantucket Sound-Vineyard Sound-Buzzards Bay- 354 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 AM TO 3 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 10 to 20 kt with gusts up to 25 kt. Seas 2 to 4 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ230-200400- /O.CON.KBOX.SC.Y.0062.180420T0800Z-180420T2200Z/ Boston Harbor- 354 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 4 AM TO 6 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds around 15 kt with gusts up to 25 kt. Waves around 2 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston
466 WHUS71 KBOX 200213 MWWBOX URGENT - MARINE WEATHER MESSAGE National Weather Service Boston/Norton MA 1013 PM EDT Thu Apr 19 2018 ANZ250-201015- /O.CON.KBOX.SC.Y.0062.180420T0400Z-180420T2200Z/ Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1013 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 10 to 20 kt with gusts up to 25 kt. Seas 3 to 6 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ254>256-201015- /O.CON.KBOX.SC.Y.0062.000000T0000Z-180421T0000Z/ Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 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- 1013 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 10 to 20 kt with gusts up to 30 kt. Seas 5 to 8 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ251-201015- /O.CON.KBOX.SC.Y.0062.180420T0600Z-180420T1900Z/ Massachusetts Bay and Ipswich Bay- 1013 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 AM TO 3 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 10 to 20 kt with gusts up to 25 kt. Seas 2 to 4 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ231>234-201015- /O.CON.KBOX.SC.Y.0062.180420T0600Z-180420T1900Z/ Cape Cod Bay-Nantucket Sound-Vineyard Sound-Buzzards Bay- 1013 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 AM TO 3 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ235-237-201015- /O.CON.KBOX.SC.Y.0062.000000T0000Z-180420T2100Z/ Rhode Island Sound-Block Island Sound- 1013 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 5 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 15 to 20 kt with gusts up to 30 kt. Seas 3 to 6 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ230-201015- /O.CON.KBOX.SC.Y.0062.180420T0800Z-180420T2200Z/ Boston Harbor- 1013 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 4 AM TO 6 PM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 15 to 20 kt with gusts up to 25 kt. Waves around 2 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ236-201015- /O.CON.KBOX.SC.Y.0062.180420T0800Z-180420T1500Z/ Narragansett Bay- 1013 PM EDT Thu Apr 19 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 4 AM TO 11 AM EDT FRIDAY... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston
754 WHUS71 KBOX 200753 MWWBOX URGENT - MARINE WEATHER MESSAGE National Weather Service Boston/Norton MA 353 AM EDT Fri Apr 20 2018 ANZ250-201600- /O.EXT.KBOX.SC.Y.0062.000000T0000Z-180421T0600Z/ Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 353 AM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 2 AM EDT SATURDAY... * WINDS AND SEAS...Northwest winds 10 to 20 kt with gusts up to 25 kt. Seas 3 to 5 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ254>256-201600- /O.EXT.KBOX.SC.Y.0062.000000T0000Z-180421T0600Z/ Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 353 AM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 2 AM EDT SATURDAY... * WINDS AND SEAS...Northwest winds 10 to 20 kt with gusts up to 30 kt. Seas 4 to 7 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ251-201600- /O.EXT.KBOX.SC.Y.0062.000000T0000Z-180421T0600Z/ Massachusetts Bay and Ipswich Bay- 353 AM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 2 AM EDT SATURDAY... * WINDS AND SEAS...Northwest winds 10 to 20 kt with gusts up to 30 kt. Seas 1 to 3 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ231>234-201600- /O.EXT.KBOX.SC.Y.0062.000000T0000Z-180421T0600Z/ Cape Cod Bay-Nantucket Sound-Vineyard Sound-Buzzards Bay- 353 AM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 2 AM EDT SATURDAY... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ235-237-201600- /O.EXT.KBOX.SC.Y.0062.000000T0000Z-180421T0400Z/ Rhode Island Sound-Block Island Sound- 353 AM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... * WINDS AND SEAS...Northwest winds 10 to 20 kt with gusts up to 25 kt. Seas 3 to 5 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ230-201600- /O.EXT.KBOX.SC.Y.0062.180420T0800Z-180421T0400Z/ Boston Harbor- 353 AM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ236-201600- /O.EXT.KBOX.SC.Y.0062.180420T0800Z-180421T0200Z/ Narragansett Bay- 353 AM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 10 PM EDT THIS EVENING... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Waves 1 to 3 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston
913 WHUS71 KBOX 201731 MWWBOX URGENT - MARINE WEATHER MESSAGE National Weather Service Boston/Norton MA 131 PM EDT Fri Apr 20 2018 ANZ250-210145- /O.CON.KBOX.SC.Y.0062.000000T0000Z-180421T0600Z/ Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 131 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 AM EDT SATURDAY... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ254>256-210145- /O.CON.KBOX.SC.Y.0062.000000T0000Z-180421T0600Z/ Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 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- 131 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 AM EDT SATURDAY... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 6 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ251-210145- /O.CON.KBOX.SC.Y.0062.000000T0000Z-180421T0600Z/ Massachusetts Bay and Ipswich Bay- 131 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 AM EDT SATURDAY... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ231>234-210145- /O.CON.KBOX.SC.Y.0062.000000T0000Z-180421T0600Z/ Cape Cod Bay-Nantucket Sound-Vineyard Sound-Buzzards Bay- 131 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 AM EDT SATURDAY... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ235-237-210145- /O.CON.KBOX.SC.Y.0062.000000T0000Z-180421T0400Z/ Rhode Island Sound-Block Island Sound- 131 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ230-210145- /O.CON.KBOX.SC.Y.0062.000000T0000Z-180421T0400Z/ Boston Harbor- 131 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT TONIGHT... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ236-210145- /O.CON.KBOX.SC.Y.0062.000000T0000Z-180421T0200Z/ Narragansett Bay- 131 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 10 PM EDT THIS EVENING... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Waves 2 to 3 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston
950 WHUS71 KBOX 201912 MWWBOX URGENT - MARINE WEATHER MESSAGE National Weather Service Boston/Norton MA 312 PM EDT Fri Apr 20 2018 ANZ231>234-251-202015- /O.CAN.KBOX.SC.Y.0062.000000T0000Z-180421T0600Z/ Cape Cod Bay-Nantucket Sound-Vineyard Sound-Buzzards Bay- Massachusetts Bay and Ipswich Bay- 312 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY IS CANCELLED... The National Weather Service in Boston/Norton has cancelled the Small Craft Advisory. Northwest winds will continue to diminish less than 25 kt overnight. $$ ANZ236-202015- /O.CAN.KBOX.SC.Y.0062.000000T0000Z-180421T0200Z/ Narragansett Bay- 312 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY IS CANCELLED... The National Weather Service in Boston/Norton has cancelled the Small Craft Advisory. Northwest winds will continue to diminish less than 25 kt overnight. $$ ANZ235-237-202015- /O.CAN.KBOX.SC.Y.0062.000000T0000Z-180421T0400Z/ Rhode Island Sound-Block Island Sound- 312 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY IS CANCELLED... The National Weather Service in Boston/Norton has cancelled the Small Craft Advisory. Northwest winds will continue to diminish less than 25 kt overnight. $$ ANZ230-202300- /O.EXT.KBOX.SC.Y.0062.000000T0000Z-180420T2300Z/ Boston Harbor- 312 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 7 PM EDT THIS EVENING... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Waves around 2 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ250-210315- /O.CON.KBOX.SC.Y.0062.000000T0000Z-180421T0600Z/ Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 312 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 AM EDT SATURDAY... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ254>256-210315- /O.CON.KBOX.SC.Y.0062.000000T0000Z-180421T0600Z/ Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 312 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 AM EDT SATURDAY... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston
054 WHUS71 KBOX 202331 MWWBOX URGENT - MARINE WEATHER MESSAGE National Weather Service Boston/Norton MA 731 PM EDT Fri Apr 20 2018 ANZ250-210600- /O.CON.KBOX.SC.Y.0062.000000T0000Z-180421T0600Z/ Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 731 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY UNTIL 2 AM EDT SATURDAY... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ254>256-210600- /O.CON.KBOX.SC.Y.0062.000000T0000Z-180421T0600Z/ Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 731 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY UNTIL 2 AM EDT SATURDAY... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston
871 WHUS71 KBOX 210211 MWWBOX URGENT - MARINE WEATHER MESSAGE National Weather Service Boston/Norton MA 1011 PM EDT Fri Apr 20 2018 ANZ250-210600- /O.CON.KBOX.SC.Y.0062.000000T0000Z-180421T0600Z/ Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 1011 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 AM EDT SATURDAY... * WINDS AND SEAS...Northwest winds around 15 kt with gusts up to 25 kt. Seas 3 to 5 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ ANZ254>256-210600- /O.CON.KBOX.SC.Y.0062.000000T0000Z-180421T0600Z/ Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 1011 PM EDT Fri Apr 20 2018 ...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 AM EDT SATURDAY... * WINDS AND SEAS...Northwest winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 feet. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Small Craft Advisory means that wind speeds of 25 to 33 knots are expected to produce hazardous wave conditions to small craft. Inexperienced mariners, especially those operating smaller vessels, should avoid navigating in these conditions. && $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston
895 WHUS71 KBOX 210549 MWWBOX URGENT - MARINE WEATHER MESSAGE National Weather Service Boston/Norton MA 149 AM EDT Sat Apr 21 2018 ANZ250-210700- /O.EXP.KBOX.SC.Y.0062.000000T0000Z-180421T0600Z/ Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary- 149 AM EDT Sat Apr 21 2018 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 2 AM EDT EARLY THIS MORNING... Winds and seas have diminished and will continue to diminish early this morning. $$ ANZ254>256-210700- /O.EXP.KBOX.SC.Y.0062.000000T0000Z-180421T0600Z/ Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- Coastal Waters extending out to 25 nm South of Marthas Vineyard and Nantucket- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 149 AM EDT Sat Apr 21 2018 ...SMALL CRAFT ADVISORY WILL EXPIRE AT 2 AM EDT EARLY THIS MORNING... Winds and seas have diminished and will continue to diminish early this morning. $$ For the latest updates...please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston
What forecasters said that day
The local office's own words before this small craft advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Boston/Norton, MA wrote its last area forecast discussion before this small craft advisory went out at Apr 19, 3:59 AM EDT, 2 minutes earlier.
Area forecast discussion, Apr 19, 3:59 AM EDT, 2 minutes before
Area Forecast Discussion
National Weather Service Boston/Norton MA
359 AM EDT Thu Apr 19 2018
.SYNOPSIS...
Low pressure over Virginia will pass south of Nantucket this
afternoon and pass south of Nova Scotia tonight. This will bring
a period of chilly rain today. The rain may mix with wet snow,
especially in the higher elevations. Drier air moves in on
Friday, but with isolated showers possible. Building high
pressure will bring gradually warming temperatures and dry
weather into early next week. Storm system expected for mid to
late week.
&&
.NEAR TERM /UNTIL 6 PM THIS EVENING/...
Low pressure along the Mid Atlantic coast will feed upon
favorable dynamics and a sharp baroclinic zone covering the Mid
Atlantic and Southern New England. This favors strong lift, with
models showing 40-50 mb/hr rates during the day. Cross sections
show moisture reaching to 500 mb. While not deep, this is
probably deep enough. Favorable lift and moisture move over our
area starting between 09Z and 12Z and reach maximum values
during the morning, then diminish during the afternoon.
Also of concern is precip type. Temperatures start the day
mainly in the 30s while dew points will be in the upper 20s and
lower 30s. As precip rates increase this morning, this may
induce wet bulb cooling which may bring temps down a few
degrees. Forecast profiles of temperature show borderline
rain/snow profiles, and any additional cooling would only
increase the potential for snow. Profiles most favor snow over
the highlands as well as across Western and Central Mass, and
maybe the Merrimack Valley. An inch or two accumulation is
possible in the highlands, with an inch or less elsewhere in the
favorable area. Mainly rain expected in CT/RI/Southeast Mass
except in the highlands along the CT/RI border.
The low passes Nantucket around 18Z/2PM, at which time the
favorable lift starts moving off to the northeast. Surface winds
will start shifting from the northwest, bringing in drier air.
Low level temps aloft support max sfc temps in the low to mid
40s. The wet bulb cooling may keep some areas in the highlands
in the 30s.
&&
.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM FRIDAY/...
Tonight...
Even as the surface low moves off to the east tonight, the
upper trough will be swinging overhead. The axis is sharp, and
carries a -24C to -26C cold core. This may be sufficient to
maintain clouds and a chance of showers through the evening. The
trough moves off after midnight, after which we may see some
clearing especially in southern sections.
Friday...
Cyclonic flow around the upper low continues on Friday. The
moisture aloft diminishes through the day, which should allow at
least partly sunny skies. The diminishing moisture will reduce
the development of showers, but we expect at least widely
scattered showers during the afternoon.
The cold advection and cold temperatures aloft should allow
mixing to at least 850 mb. Winds in this layer should reach 25
knots, so we expect gusts of 25-30 mph. Temperatures in the
layer support mid to upper 40s, and if mixing goes above 850 mb
then highs in the low 50s are possible.
&&
.LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/...
*/ Highlights...
- Near-seasonable, dry conditions over the weekend
- Warmer conditions, dry, Monday into Tuesday
- Mid to late week storm system
Overview and model preferences...
A couple of slow meandering cutoffs to monitor through the long
term. The first, is the one that will most effectively define
sensible wx details through the weekend, formed in N New England
and shifting into the Maritimes. The slow movement maintains
below normal H5 height anomalies through early next week,
yielding temps near or below normal in spite of the continued
modification. As this first cutoff shifts E, riding will build
in its wake thanks to warm advection from the W. This ridge will
dominate the forecast through the weekend and into early next
week. The second cutoff meandering through the S stream all
weekend lead to a merger point for Pacific energy mid-week
yielding another risk for wet and more unsettled wx. Given
synoptics are in fair agreement between both operational and
ensemble data, will continue to use a blend for this forecast
update.
Discussion...
Weekend...
Upper lvl cutoff and attendant trof remain close enough to S
New England that upper lvl flow is cyclonically curved through
the period. This may assist in diurnal cloud development.
Combine this with H85/H92 temps a full std deviation below
normal (H85 roughly -4C to -6C while H92 temps run near -2C),
and expect both highs and lows to remain below seasonal normals.
Mon and Tue...
Moderating temperatures as ridging gains control. H85 temps
shift above 0C by Mon afternoon, with H92 temps approaching +4
to +6C. This will allow highs to reach near or even above
seasonal normals, limited in part by the strengthening
subsidence inversion as high pres crests across the region.
Also, coastal areas limited by sea breezes thanks to low lvl
flow SSTs still in the 40s. Overnight lows cool thanks to
radiational cooling setup.
Mid-late next week...
A potential merger of Pacific, S stream and even N stream
energy will redevelop longwave trof across the E CONUS, agreed
upon by most ensembles as mean height anomalies once again drop
below normal. This will yield another round of wetter and more
unsettled wx. Timing could be as early as Wed for a new round of
wet wx, but exact timing/details will be better defined as we
approach.
&&
.AVIATION /08Z THURSDAY THROUGH MONDAY/...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Short Term /through Friday/...
Today and tonight...Moderate confidence.
VFR conditions extend to eastern PA while areas of rain have
reached to New York City and the lower Hudson Valley. Expect
cigs and vsbys to lower through the morning, with a period of
MVFR/IFR from 13Z through 18Z, then again in showers 21Z to 03Z.
Mainly rain in the coastal plain, rain/snow mixed in the
interior, and possibly all snow in Western Mass and the
Worcester Hills.
Partial clearing tonight as drier air moves in. Conditions
improve to VFR during this time. Northeast winds during the
morning turn from the northwest late in the day and at night.
Friday...High confidence.
VFR. Northwest winds will gust to 25 knots during the day.
Widely scattered showers during the day, and some of this could
briefly cause MVFR cigs/vsbys.
KBOS Terminal...High confidence in TAF.
VFR conditions change to MVFR around 15Z/11 AM. Brief IFR
possible if winds pick up out of the east. Precipitation mainly
rain, but some snow possible if the precipitation rate
increases. Any accumulation should remain on grassy surfaces.
KBDL Terminal...High confidence in TAF.
Light precipitation develops around 09Z/5 AM, increasing to max
intensity 13Z to 18Z. Lowest cigs/vsbys expected at that time,
with some improvement during the mid afternoon, then briefly
lower again during the evening. Any snow accumulation is
expected to be confined to grassy surfaces.
Outlook /Friday Night through Monday/...Moderate confidence.
Friday Night through Saturday: VFR. Breezy.
Saturday Night through Monday: VFR.
&&
.MARINE...
Forecaster Confidence Levels...
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
Short Term /through Friday/...High confidence.
Today... A coastal weather system moves northeast from the
Delmarva coast and passes near the benchmark mid afternoon, then
moves south of Nova Scotia tonight. Rain will lower vsbys to
around 2-3 miles today. Winds remain below 25 knots and seas
below 5 feet.
Tonight... Increasing northwest winds tonight as the offshore
weather system moves off past Nova Scotia. Winds will reach 30
knots at times. Seas will build on the southern waters late at
night, with five to seven foot heights overnight. Small craft
advisory has been issued for all waters.
Friday... Northwest winds gusting to 25 knots, with seas near 5
feet on the outer waters. Small Craft Advisory in effect.
Outlook /Friday Night through Monday/...Moderate
Friday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Areas of seas approaching 5 ft.
Saturday through Monday: Winds less than 25 kt.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory from 2 AM to 3 PM EDT Friday for
ANZ231>234-251.
Small Craft Advisory from 4 AM to 6 PM EDT Friday for ANZ230.
Small Craft Advisory from 4 AM to 3 PM EDT Friday for ANZ236.
Small Craft Advisory from 9 PM this evening to 3 PM EDT Friday
for ANZ235-237.
Small Craft Advisory from midnight tonight to 3 PM EDT Friday
for ANZ250.
Small Craft Advisory from 9 PM this evening to 8 PM EDT Friday
for ANZ254>256.
&&
SYNOPSIS...WTB/Doody
NEAR TERM...WTB
SHORT TERM...
LONG TERM...Doody
AVIATION...WTB/Doody
MARINE...WTB/DoodyHazardous weather outlook, Apr 19, 3:42 AM EDT, 19 minutes before
Hazardous Weather Outlook National Weather Service Boston/Norton MA 342 AM EDT Thu Apr 19 2018 MAZ002>004-008-009-026-200745- Western Franklin MA-Eastern Franklin MA-Northern Worcester MA- Western Hampshire MA-Western Hampden MA-Northern Middlesex MA- 342 AM EDT Thu Apr 19 2018 This Hazardous Weather Outlook is for central Massachusetts, eastern Massachusetts and western Massachusetts. .DAY ONE...Today and Tonight. There is a low risk for reaching advisory level snowfall, 1 to 3 inches, throughout the day as snow mixes with rain. Highest confidence of any accumulating snow is across the high terrain of the Berkshires. Most if not all accumulating snow will be on grassy surfaces. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. CTZ002>004-MAZ005>007-010>024-RIZ001>008-200745- Hartford CT-Tolland CT-Windham CT-Central Middlesex MA- Western Essex MA-Eastern Essex MA-Eastern Hampshire MA- Eastern Hampden MA-Southern Worcester MA-Western Norfolk MA- Southeast Middlesex MA-Suffolk MA-Eastern Norfolk MA- Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA- Southern Bristol MA-Southern Plymouth MA-Barnstable MA-Dukes MA- Nantucket MA-Northwest Providence RI-Southeast Providence RI- Western Kent RI-Eastern Kent RI-Bristol RI-Washington RI-Newport RI- Block Island RI- 342 AM EDT Thu Apr 19 2018 This Hazardous Weather Outlook is for northern Connecticut, central Massachusetts, eastern Massachusetts, northeastern Massachusetts, southeastern Massachusetts, western Massachusetts, and Rhode Island. .DAY ONE...Today and Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. ANZ230>237-250-251-254>256-200745- Boston Harbor-Cape Cod Bay-Nantucket Sound-Vineyard Sound- Buzzards Bay-Rhode Island Sound-Narragansett Bay-Block Island Sound- Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary-Massachusetts Bay and Ipswich Bay- Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 nm- 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- 342 AM EDT Thu Apr 19 2018 This Hazardous Weather Outlook is for Massachusetts and Rhode Island coastal waters. .DAY ONE...Today and Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. For the latest updates, please visit our webpage at www.weather.gov/boston You can follow us on Facebook at www.facebook.com/NWSBoston You can follow us on Twitter at @NWSBoston
Nearby
Small Craft Advisories in Massachusetts, 2018Every small craft advisory in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.