Small Craft Advisory 77, NWS Boston/Norton, MA

486 
WHUS71 KBOX 261446
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
1046 AM EDT Sat May 26 2018

ANZ230-231-262300-
/O.EXB.KBOX.SC.Y.0077.180526T2100Z-180527T2200Z/
Boston Harbor-Cape Cod Bay-
1046 AM EDT Sat May 26 2018

...SMALL CRAFT ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO
6 PM EDT SUNDAY...

The National Weather Service in Boston/Norton has issued a Small
Craft Advisory, which is in effect from 5 PM this afternoon to
6 PM EDT Sunday.

* WINDS AND SEAS...East winds 5 to 15 kt with gusts up to 30 kt.
  Waves 1 to 2 feet in Boston Harbor and seas 2 to 4 feet in Cape
  Cod Bay.

$$

ANZ250-262300-
/O.EXT.KBOX.SC.Y.0077.180526T2100Z-180527T2200Z/
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1046 AM EDT Sat May 26 2018

...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 5 PM THIS AFTERNOON TO
6 PM EDT SUNDAY...

* WINDS AND SEAS...East 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.

&&

$$

ANZ251-262300-
/O.EXT.KBOX.SC.Y.0077.180526T2100Z-180527T2200Z/
Massachusetts Bay and Ipswich Bay-
1046 AM EDT Sat May 26 2018

...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 5 PM THIS AFTERNOON TO
6 PM EDT SUNDAY...

* WINDS AND SEAS...Northeast winds 10 to 20 kt with gusts up to 
  30 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.

&&

$$

ANZ254-262300-
/O.CON.KBOX.SC.Y.0075.000000T0000Z-180527T2200Z/
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1046 AM EDT Sat May 26 2018

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM EDT SUNDAY...

* WINDS AND SEAS...East 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.

&&

$$

ANZ255-256-262300-
/O.CON.KBOX.SC.Y.0075.000000T0000Z-180527T0300Z/
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-
1046 AM EDT Sat May 26 2018

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 11 PM EDT THIS
EVENING...

* WINDS AND SEAS...Southwest winds 5 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

570 
WHUS71 KBOX 262038
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
438 PM EDT Sat May 26 2018

ANZ254-270445-
/O.CAN.KBOX.SC.Y.0075.000000T0000Z-180527T2200Z/
/O.EXB.KBOX.SC.Y.0077.180526T2300Z-180528T1000Z/
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
438 PM EDT Sat May 26 2018

...SMALL CRAFT ADVISORY IN EFFECT UNTIL 6 AM EDT MONDAY...

The National Weather Service in Boston/Norton has issued a Small
Craft Advisory, which is in effect until 6 AM EDT Monday.

* WINDS AND SEAS...East winds 10 to 20 kt with gusts up to 30 
  kt. Seas 5 to 8 feet.

$$

ANZ255-256-270445-
/O.CAN.KBOX.SC.Y.0075.000000T0000Z-180527T0300Z/
/O.EXB.KBOX.SC.Y.0077.180527T1100Z-180528T1000Z/
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-
438 PM EDT Sat May 26 2018

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 6 AM EDT
MONDAY...

The National Weather Service in Boston/Norton has issued a Small
Craft Advisory, which is in effect from 7 AM Sunday to 6 AM EDT
Monday. 

* WINDS AND SEAS...East 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.

&&

$$

ANZ230-262145-
/O.CAN.KBOX.SC.Y.0077.180526T2100Z-180527T2200Z/
Boston Harbor-
438 PM EDT Sat May 26 2018

...SMALL CRAFT ADVISORY IS CANCELLED...

The National Weather Service in Boston/Norton has cancelled the
Small Craft Advisory.

Winds of 20 kt are expected behind the backdoor cold front this
evening and continuing on Sunday...just below Small Craft Advisory
criteria.

$$

ANZ232>235-237-270445-
/O.EXB.KBOX.SC.Y.0077.180527T1100Z-180528T1000Z/
Nantucket Sound-Vineyard Sound-Buzzards Bay-Rhode Island Sound-
Block Island Sound-
438 PM EDT Sat May 26 2018

...SMALL CRAFT ADVISORY IN EFFECT FROM 7 AM SUNDAY TO 6 AM EDT
MONDAY...

The National Weather Service in Boston/Norton has issued a Small
Craft Advisory, which is in effect from 7 AM Sunday to 6 AM EDT
Monday.

* WINDS AND SEAS...Northeast winds 10 to 20 kt with gusts up to 
  30 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.

&&

$$

ANZ231-250-251-270445-
/O.EXT.KBOX.SC.Y.0077.180526T2300Z-180528T1000Z/
Cape Cod Bay-
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-Massachusetts Bay and Ipswich Bay-
438 PM EDT Sat May 26 2018

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 AM EDT MONDAY...

* WINDS AND SEAS...East winds 10 to 20 kt with gusts up to 30 
  kt. Seas 5 to 8 feet.

$$

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

790 
WHUS71 KBOX 270735
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
335 AM EDT Sun May 27 2018

ANZ231-250-251-254-255-271545-
/O.EXT.KBOX.SC.Y.0077.000000T0000Z-180528T2200Z/
Cape Cod Bay-
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-
335 AM EDT Sun May 27 2018

...SMALL CRAFT ADVISORY UNTIL 6 PM EDT MONDAY...

* WINDS AND SEAS...Northeast winds 10 to 20 kt with gusts up to 
  30 kt. Seas 5 to 8 feet.

$$

ANZ232>235-237-271545-
/O.EXT.KBOX.SC.Y.0077.180527T1100Z-180528T0400Z/
Nantucket Sound-Vineyard Sound-Buzzards Bay-Rhode Island Sound-
Block Island Sound-
335 AM EDT Sun May 27 2018

...SMALL CRAFT ADVISORY FROM 7 AM THIS MORNING TO MIDNIGHT EDT 
TONIGHT...

* WINDS AND SEAS...Northeast winds 15 to 20 kt with gusts up to 
  30 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.

&&

$$

ANZ256-271545-
/O.CON.KBOX.SC.Y.0077.180527T1100Z-180528T1000Z/
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
335 AM EDT Sun May 27 2018

...SMALL CRAFT ADVISORY FROM 7 AM THIS MORNING TO 6 AM EDT MONDAY...

* WINDS AND SEAS...Northeast 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.

&&

$$

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

382 
WHUS71 KBOX 271506
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
1106 AM EDT Sun May 27 2018

ANZ231-250-251-254-255-272315-
/O.CON.KBOX.SC.Y.0077.000000T0000Z-180528T2200Z/
Cape Cod Bay-
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-
1106 AM EDT Sun May 27 2018

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM EDT MONDAY...

* WINDS AND SEAS...Northeast winds 10 to 20 kt with gusts up to 
  30 kt. Seas 5 to 8 feet.

$$

ANZ232>235-237-272315-
/O.CON.KBOX.SC.Y.0077.000000T0000Z-180528T0400Z/
Nantucket Sound-Vineyard Sound-Buzzards Bay-Rhode Island Sound-
Block Island Sound-
1106 AM EDT Sun May 27 2018

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...

* WINDS AND SEAS...Northeast winds 15 to 20 kt with gusts up to 
  30 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.

&&

$$

ANZ256-272315-
/O.CON.KBOX.SC.Y.0077.000000T0000Z-180528T1000Z/
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1106 AM EDT Sun May 27 2018

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT MONDAY...

* WINDS AND SEAS...Northeast 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.

&&

$$

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

982 
WHUS71 KBOX 271957
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
357 PM EDT Sun May 27 2018

ANZ250-251-254-255-280400-
/O.EXT.KBOX.SC.Y.0077.000000T0000Z-180528T1400Z/
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-
357 PM EDT Sun May 27 2018

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 10 AM EDT MONDAY...

* WINDS AND SEAS...Northeast winds 10 to 20 kt with gusts up to 
  30 kt. Seas 4 to 7 feet.

$$

ANZ231-280400-
/O.EXT.KBOX.SC.Y.0077.000000T0000Z-180528T0400Z/
Cape Cod Bay-
357 PM EDT Sun May 27 2018

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...

* WINDS AND SEAS...East winds 15 to 20 kt with gusts up to 30 
  kt. Seas 2 to 4 feet.

$$

ANZ232>235-237-280400-
/O.CON.KBOX.SC.Y.0077.000000T0000Z-180528T0400Z/
Nantucket Sound-Vineyard Sound-Buzzards Bay-Rhode Island Sound-
Block Island Sound-
357 PM EDT Sun May 27 2018

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL MIDNIGHT EDT
TONIGHT...

* WINDS AND SEAS...Northeast winds 15 to 20 kt with gusts up to 
  30 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.

&&

$$

ANZ256-280400-
/O.CON.KBOX.SC.Y.0077.000000T0000Z-180528T1000Z/
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
357 PM EDT Sun May 27 2018

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT MONDAY...

* WINDS AND SEAS...Northeast 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.

&&

$$

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

733 
WHUS71 KBOX 280717
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
317 AM EDT Mon May 28 2018

ANZ250-251-254-255-281530-
/O.EXT.KBOX.SC.Y.0077.000000T0000Z-180528T1800Z/
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-
317 AM EDT Mon May 28 2018

...SMALL CRAFT ADVISORY UNTIL 2 PM EDT THIS AFTERNOON...

* WINDS AND SEAS...Northeast winds 10 to 15 kt with gusts up to 
  25 kt. Seas 3 to 6 feet.

$$

ANZ256-281200-
/O.EXT.KBOX.SC.Y.0077.000000T0000Z-180528T1200Z/
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
317 AM EDT Mon May 28 2018

...SMALL CRAFT ADVISORY UNTIL 8 AM EDT THIS MORNING...

* WINDS AND SEAS...Northeast winds 10 to 15 kt with gusts up to 
  20 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

787 
WHUS71 KBOX 281137
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
737 AM EDT Mon May 28 2018

ANZ256-281800-
/O.EXT.KBOX.SC.Y.0077.000000T0000Z-180528T1800Z/
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
737 AM EDT Mon May 28 2018

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 2 PM EDT THIS
AFTERNOON...

* WINDS AND SEAS...North winds 5 to 10 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.

&&

$$

ANZ250-251-254-255-281800-
/O.CON.KBOX.SC.Y.0077.000000T0000Z-180528T1800Z/
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-
737 AM EDT Mon May 28 2018

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT THIS
AFTERNOON...

* WINDS AND SEAS...Northeast winds 5 to 10 kt. Seas 3 to 5 feet.

$$

For the latest updates...please visit our webpage at
www.weather.gov/boston

You can follow us on Facebook at
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You can follow us on Twitter at
@NWSBoston

690 
WHUS71 KBOX 281406
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
1006 AM EDT Mon May 28 2018

ANZ256-281515-
/O.CAN.KBOX.SC.Y.0077.000000T0000Z-180528T1800Z/
Coastal Waters from Montauk NY to Marthas Vineyard extending out
to 20 nm South of Block Island-
1006 AM EDT Mon May 28 2018

...SMALL CRAFT ADVISORY IS CANCELLED...

The National Weather Service in Boston/Norton has cancelled the
Small Craft Advisory.

Seas have diminished less than 5 feet.

$$

ANZ250-251-254-255-281800-
/O.CON.KBOX.SC.Y.0077.000000T0000Z-180528T1800Z/
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-
1006 AM EDT Mon May 28 2018

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 2 PM EDT THIS
AFTERNOON...

* WINDS AND SEAS...Northeast winds 5 to 10 kt. Seas 3 to 5 feet.

$$

For the latest updates...please visit our webpage at
www.weather.gov/boston

You can follow us on Facebook at
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You can follow us on Twitter at
@NWSBoston

388 
WHUS71 KBOX 281738
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
138 PM EDT Mon May 28 2018

ANZ251-255-281845-
/O.CAN.KBOX.SC.Y.0077.000000T0000Z-180528T1800Z/
Massachusetts Bay and Ipswich Bay-
Coastal Waters extending out to 25 nm South of Marthas Vineyard
and Nantucket-
138 PM EDT Mon May 28 2018

...SMALL CRAFT ADVISORY IS CANCELLED...

The National Weather Service in Boston/Norton has cancelled the
Small Craft Advisory.

Seas diminished less than 5 feet.

$$

ANZ250-254-282000-
/O.EXT.KBOX.SC.Y.0077.000000T0000Z-180528T2000Z/
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
138 PM EDT Mon May 28 2018

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 4 PM EDT THIS
AFTERNOON...

* WINDS AND SEAS...Northeast winds 5 to 10 kt. Seas 3 to 6 feet.

$$

For the latest updates...please visit our webpage at
www.weather.gov/boston

You can follow us on Facebook at
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You can follow us on Twitter at
@NWSBoston

575 
WHUS71 KBOX 281955
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
355 PM EDT Mon May 28 2018

ANZ250-254-282100-
/O.EXP.KBOX.SC.Y.0077.000000T0000Z-180528T2000Z/
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
355 PM EDT Mon May 28 2018

...SMALL CRAFT ADVISORY WILL EXPIRE AT 4 PM EDT THIS AFTERNOON...

Seas will continue to diminish less than 5 feet this evening.

$$

For the latest updates...please visit our webpage at
www.weather.gov/boston

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Area Forecast Discussion
National Weather Service Boston/Norton MA
359 AM EDT Sat May 26 2018

.SYNOPSIS...
High pressure centered south and east of New England will allow
for mild temperatures overnight, and another day of warmth for
much of Saturday. A cold front drops south across the region
Saturday afternoon and evening, bringing scattered showers and a
few thunderstorms. This is followed by much cooler and
unsettled weather Sunday with some improvement by Monday. High
pressure brings mainly dry and warmer weather Tuesday through
Thursday. An approaching weather system brings showers Friday.

&&

.NEAR TERM /UNTIL 6 AM THIS MORNING/...
155 AM Update...

Mid level clouds starting to move across central and N Mass as
seen on latest observations as well as GOES-East Nighttime
Microphysics Composite satellite imagery. Bands of showers
remains across N NY into N VT/NH into western ME well ahead of
approaching cold front near the N ME/Canadian border. Did note a
few showers moving across S VT around 0430Z, but dissipated as
they moved into the drier air across S NH into N central Mass
with T/Td spreads from 8 degrees at KEEN to 12 degrees at KAFN
at 05Z.

Expect mid level clouds to continue to slowly shift S through
the remainder of the night. Will see dry conditions continue as
the leading edge of the precip will remain well N.

Temps running a few degs warmer than forecast especially across
N central and NE Mass where SCT-BKN clouds have moved across.
Otherwise, readings are pretty much on track at 05Z.

&&

.SHORT TERM /6 AM THIS MORNING THROUGH 6 PM SUNDAY/...
Expecting a nearly zonal mid level flow over the USA/Canadian
border into early next week, with a few small amplitude waves
migrating through the longwave pattern. Of greater significance
would be a strong mid level ridge off the SE USA coast near the
Bahamas. This ridge should maintain an above normal stream of
moisture with tropical origins across the eastern USA. The
question for southern New England is whether any northern stream
disturbances during the coming week can alter the flow pattern
enough to pull this moisture farther north into our area.

Model solutions are similar enough to favor a consensus
approach through this holiday weekend to smooth over the less
predictable details. More significant detail differences for the
rest of next week, mainly due to timing issues. Have higher
confidence in the forecast through Wednesday, than the latter
half of next week.

Details...

High pressure building over the Maritimes brings increasing east
winds and a cool moist marine flow to Southern New England. Gusty
winds along the east coast, too. At least a chance of showers
Sunday, with a more early spring-like raw feel. Greatest risk for
showers toward the eastern half of southern New England.

High pressure moves east of the Maritimes on Monday. Surface
dewpoints start to slowly rise, and clouds should gradually
diminish. Looking mainly dry through Wednesday, as another high
pressure moves SE across our region from central Canada. This high
pressure should be offshore by Thursday, leading to an increasing
risk for showers late Thursday into Friday.

Near to above normal temperatures expected Monday through
Friday.Saturday...

There is some uncertainty in exact timing of the back door cold
front, which will cross thru the area sometime Sat afternoon and
evening, aided by a short wave pushing thru the area. 12Z NAM has
slowed down the timing of fropa, holding off until towards 00Z for
NE MA. However the 12Z GFS shows the front pushing thru a large
portion of southern New England between 18Z and 00Z, and hi-res
guidance leans towards the GFS solution. As a result have leaned
towards the faster solutions for this forecast package. Temps will
tumble behind the front.

Anticipate mostly sunny skies in the morning, humid with dew
points in the upper 50s to low 60s. Should have enough time
prior to fropa for temps to climb into the mid and upper 80s for
much of the region, even some highs around 90 possible in the
lower CT River Valley. Exception will be across south coastal
MA/RI including the Cape/Islands, where SW flow will bring
marine influenced air. Then increasing clouds as the back door
cold front approaches. Scattered afternoon/evening showers are
expected, with a few thunderstorms possible. Low level lapse
rates are steep south of the front, but model soundings suggest
warm air in the mid levels that hinder the extent of
instability.

Precipitable water peaks out around 1.25 inches, could see brief
locally heavy rainfall. Winds aloft are weak but dry air intrusion
in the mid levels could allow for some gusty winds with any
thunderstorm. SPC has our area highlighted for general thunder.

Saturday night...

The cold front progresses thru the remainder of southern New England
Sat night, bringing a continued chance for showers and isolated
thunderstorms. Wind shift to the N/NE allows cooler marine-
influenced airmass to continue pressing for much of the area thru
the area, having a noticeably cooler feel. Models show potential for
gusts around 20 kts along a portion of the east coastal shoreline.

Expect overnight lows for much of the area to dip into the low to
mid 50s except possibly parts of SW MA and northern CT where lows in
the upper 50s to around 60 are probable, farther away form the ocean
influence.

&&

.LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/...

Big Picture...

Today's dramatis coelus...weather of the drama?...features a zonal
upper flow along the northern tier of the USA, a closed low over the
Western USA, another closed low along the Alaska coast, closed low
over the Gulf of Mexico held in place by ridges centered over Mexico
and the West Indies.

One shortwave in the zonal flow moves east of New England Monday,
allowing some drying over our area. A sharper shortwave in the zonal
flow moves across Eastern Canada Tuesday, with model consensus
showing a windshift over our area as the shortwave moves past. The
closed Western low gets kicked out of position as the Alaska low
moves down the coast and ashore. The Western low then ejects into
the zonal flow, draws the Gulf of Mexico low north and merges, then
moves through New England at the end of the week.

Model solutions show above normal contour heights through the
forecast period, and thermal fields also indicate above normal
temperatures.

Model solutions remain similar through Thursday morning, then show a
similar broad pattern with differences in detail. This gives us high
confidence in the forecast through midweek and moderate confidence
late week.

Concerns...

Sunday night-Monday...

Wave along the stalled cold front moves out to sea while ridgeline
from the Maritimes holds over Southern New England. Cross sections
show plenty of moisture below 700 mb but shallow and diminishing
lift. The positioning of the ridge line should maintain east-
northeast winds through Monday maintaining a moist low-level flow.
Will continue to indicate chance pops Sunday night, then mostly
cloudy skies Monday.

Tuesday through Thursday...

Second, sharper shortwave passes to our north on Tuesday. This
brings a windshift from westerly to northerly, but lots of dry air
in place at the time. High pressure surface and aloft brings
subsidence, and dry air lingers through Thursday. Expect mostly
clear skies and light wind. Light flow should support sea breezes
on Wednesday.

Thursday night-Friday...

Moisture fields increase at the cirrus level Thursday, then closer
to the surface Thursday evening and night. Timing of onset of
showers is dependant on the ejecting shortwave and its interactions
with the Gulf of Mexico low. Current info suggests showers starting
sometime Thursday night and continuing into Friday.

&&

.AVIATION /08Z SATURDAY THROUGH WEDNESDAY/...
Forecaster Confidence Levels...

Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.

Short Term /through Sunday/...High confidence.

Through 12Z...
VFR. SW winds diminish across the CT valley to S around 5 kt or
light/variable, and SW 5-10 kt elsewhere, except up to 15 kt on
the outer Cape and Nantucket where gusts to around 20 kt
possible through 10Z.

Today...
Mainly VFR conditions through most of the day. Clouds lower
across N Mass to near the Mass Pike during the afternoon. ISOLD
SHRA/TSRA after 19Z-20Z mainly from the Mass Pike northward,
best chance across NE Mass. W-SW winds 5-10 kt except up to 15
kt along S coast. Wind shift to E-NE after 21Z across NE Mass.

Tonight...
Mainly VFR through 05Z-06Z, then CIGS lower to areas of IFR from
NE-SW. Patchy LIFR CIGS across higher terrain and along S coast
toward daybreak. VSBYS lower to MVFR-IFR across E Mass/RI in
areas of fog. Winds shift to E-NE from N-S overnight with gusts
to around 20 kt along E coastal areas after 08Z. Scattered SHRA,
chance TSRA.

Sunday...
MVFR-IFR CIGS linger through most of the day. Scattered SHRA
through the day. Isolated TSRA mainly S of the Mass Pike by
midday, then offshore late in the day. VSBYS improve to VFR N of
Mass Pike around midday, but MVFR-IFR in patchy fog along S
coast through the day.

KBOS Terminal...High confidence in TAF, except moderate
confidence in timing of wind shift today. SW wind around 10 kt.
Back door cold front moves across around 19Z-21Z with a wind
shift from W to E-NE. Wind gusts to around 20 kt after 03Z
tonight.

KBDL Terminal...High confidence in TAF.
Light S-SW winds become W 5-10 kt by midday. Back door cold
front should hold off until around 00Z-02Z when wind shifts
to NE.

Outlook /Sunday Night through Wednesday/...Moderate to High confidence.

Sunday Night: Mainly IFR, with local MVFR possible. Breezy.
Areas BR, slight chance SHRA, isolated TSRA.

Memorial Day: Mainly VFR, with local IFR possible in the
morning.

Monday Night: Mainly VFR, with local IFR possible. Patchy BR.

Tuesday: VFR. Breezy.

Tuesday Night through Wednesday: VFR.

&&

.MARINE...
Forecaster Confidence Levels...

Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.

Short Term /through Sunday/...High confidence.

Overnight...
Have re-issued Small Craft Advisories for Nantucket Sound,
Buzzards Bay and Vineyard Sound through the remainder of the
night. SW winds continue to gust up to 25-30 kt with seas up to
3-5 ft from the late evening ferries as they crossed. Have
extended it through the night, and may need to extend into
Saturday ahead of the front. Will revisit for the early morning
update. Remainder of forecast in good shape.

Saturday...
Small Craft Advisory continues into the morning for RI/BI
Sounds and into the afternoon for the southern/eastern outer
coastal waters. Increasing chances of late day showers and
thunderstorms ahead of a NE wind shift associated with a back
door cold front. Gusty winds immediately behind the front may
approach 25 kts, which may produce SCA conditions over the
northeastern coastal waters.

Saturday Night...
NE winds (for southern coastal waters SW winds becoming NE
during the evening), increasing with gusts to 25 kt possible
with seas 2 to 4 feet. SCA headlines may be needed. Chance for
showers and isolated thunderstorms.

Outlook /Sunday Night through Wednesday/...Moderate confidence.

Sunday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Areas of rough seas. Chance of rain showers,
areas fog, slight chance of thunderstorms. Visibility 1 to
3 nm.

Memorial Day: Winds less than 25 kt. Seas up to 5 ft.

Monday Night: Winds less than 25 kt. Areas of seas approaching
5 ft.

Tuesday: Winds less than 25 kt. Seas locally approaching 5 ft.

Tuesday Night: Winds less than 25 kt. Local visibility 1 to
3 nm.

Wednesday: Winds less than 25 kt.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...Air Quality Alert from 11 AM this morning to 11 PM EDT this
     evening for CTZ002>004.
MA...None.
RI...Air Quality Alert from 11 AM this morning to 11 PM EDT this
     evening for RIZ001>008.
MARINE...Small Craft Advisory until 8 AM EDT this morning for
     ANZ232>234.
     Small Craft Advisory until 10 AM EDT this morning for ANZ235-
     237.
     Small Craft Advisory from midnight tonight to 6 PM EDT Sunday
     for ANZ250.
     Small Craft Advisory from 1 AM to 6 PM EDT Sunday for ANZ251.
     Small Craft Advisory until 6 PM EDT Sunday for ANZ254.
     Small Craft Advisory until 11 PM EDT this evening for ANZ255-
     256.

&&

SYNOPSIS...WTB/NMB
NEAR TERM...EVT
SHORT TERM...NMB
LONG TERM...WTB
AVIATION...WTB/EVT
MARINE...WTB/EVT/NMB

Hazardous Weather Outlook
National Weather Service Boston/Norton MA
415 PM EDT Fri May 25 2018

MAZ002>024-026-262015-
Western Franklin MA-Eastern Franklin MA-Northern Worcester MA-
Central Middlesex MA-Western Essex MA-Eastern Essex MA-
Western Hampshire MA-Western Hampden 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-Northern Middlesex MA-
415 PM EDT Fri May 25 2018

This Hazardous Weather Outlook is for central Massachusetts,
eastern Massachusetts, northeastern Massachusetts, southeastern
Massachusetts and western Massachusetts.

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

CTZ002>004-262015-
Hartford CT-Tolland CT-Windham CT-
415 PM EDT Fri May 25 2018

...AIR QUALITY ALERT IN EFFECT FROM 11 AM TO 11 PM EDT SATURDAY...

This Hazardous Weather Outlook is for northern Connecticut.

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Air Quality Alert.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

RIZ001>008-262015-
Northwest Providence RI-Southeast Providence RI-Western Kent RI-
Eastern Kent RI-Bristol RI-Washington RI-Newport RI-Block Island RI-
415 PM EDT Fri May 25 2018

...AIR QUALITY ALERT IN EFFECT UNTIL 11 PM EDT THIS EVENING...
...AIR QUALITY ALERT IN EFFECT FROM 11 AM TO 11 PM EDT SATURDAY...

This Hazardous Weather Outlook is for and Rhode Island.

.DAY ONE...Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Air Quality Alert.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Air Quality Alert.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ230>237-250-251-254>256-262015-
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-
415 PM EDT Fri May 25 2018

This Hazardous Weather Outlook is for Massachusetts and Rhode
Island coastal waters.

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

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

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