Gale Watch 13, NWS Boston/Norton, MA

941 
WHUS71 KBOX 281826
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
226 PM EDT Thu May 28 2026

ANZ230-290730-
/O.UPG.KBOX.GL.A.0013.260530T0900Z-260531T0000Z/
/O.NEW.KBOX.GL.W.0017.260530T0600Z-260531T0000Z/
Boston Harbor-
226 PM EDT Thu May 28 2026

...GALE WARNING IN EFFECT FROM 2 AM TO 8 PM EDT SATURDAY...

* WHAT...North winds 25 to 35 kt with gusts up to 45 kt and 
  waves 2 to 3 feet expected.

* WHERE...Boston Harbor.

* WHEN...From 2 AM to 8 PM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels and reduce visibility.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.

&&

$$

ANZ236-290730-
/O.UPG.KBOX.GL.A.0013.260530T1500Z-260531T0000Z/
/O.NEW.KBOX.GL.W.0017.260530T0600Z-260531T0000Z/
Narragansett Bay-
226 PM EDT Thu May 28 2026

...GALE WARNING IN EFFECT FROM 2 AM TO 8 PM EDT SATURDAY...

* WHAT...North winds 20 to 30 kt with gusts up to 40 kt and 
  waves 2 to 3 feet expected.

* WHERE...Narragansett Bay.

* WHEN...From 2 AM to 8 PM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous waves which could 
  capsize or damage vessels and reduce visibility.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.

&&

$$

ANZ232>235-237-290730-
/O.UPG.KBOX.GL.A.0013.260530T1500Z-260531T0000Z/
/O.NEW.KBOX.GL.W.0017.260530T0600Z-260531T0000Z/
Nantucket Sound-Vineyard Sound-Buzzards Bay-Rhode Island Sound-
Block Island Sound-
226 PM EDT Thu May 28 2026

...GALE WARNING IN EFFECT FROM 2 AM TO 8 PM EDT SATURDAY...

* WHAT...North winds 20 to 30 kt with gusts up to 45 kt and seas 
  4 to 6 feet expected.

* WHERE...In Massachusetts coastal waters, Nantucket Sound, 
  Vineyard Sound and Buzzards Bay. In Rhode Island coastal 
  waters, Rhode Island Sound and Block Island Sound.

* WHEN...From 2 AM to 8 PM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.

&&

$$

ANZ231-290730-
/O.UPG.KBOX.GL.A.0013.260530T1500Z-260531T0000Z/
/O.NEW.KBOX.GL.W.0017.260530T0600Z-260531T0000Z/
Cape Cod Bay-
226 PM EDT Thu May 28 2026

...GALE WARNING IN EFFECT FROM 2 AM TO 8 PM EDT SATURDAY...

* WHAT...North winds 20 to 30 kt with gusts up to 45 kt and seas 
  4 to 7 feet expected.

* WHERE...Cape Cod Bay.

* WHEN...From 2 AM to 8 PM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.

&&

$$

ANZ251-290730-
/O.UPG.KBOX.GL.A.0013.260530T0900Z-260531T0000Z/
/O.NEW.KBOX.GL.W.0017.260530T0600Z-260531T0000Z/
Massachusetts Bay and Ipswich Bay-
226 PM EDT Thu May 28 2026

...GALE WARNING IN EFFECT FROM 2 AM TO 8 PM EDT SATURDAY...

* WHAT...Northeast winds 25 to 35 kt with gusts up to 45 kt and 
  seas 6 to 9 feet expected.

* WHERE...Massachusetts Bay and Ipswich Bay.

* WHEN...From 2 AM to 8 PM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.

&&

$$

ANZ250-290730-
/O.UPG.KBOX.GL.A.0013.260530T0900Z-260531T0000Z/
/O.NEW.KBOX.GL.W.0017.260530T0600Z-260531T0000Z/
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
226 PM EDT Thu May 28 2026

...GALE WARNING IN EFFECT FROM 2 AM TO 8 PM EDT SATURDAY...

* WHAT...Northeast winds 25 to 35 kt with gusts up to 45 kt and 
  seas 7 to 12 feet expected.

* WHERE...Coastal waters east of Ipswich Bay and the Stellwagen 
  Bank National Marine Sanctuary.

* WHEN...From 2 AM to 8 PM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.



PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.

&&

$$

ANZ254-290730-
/O.UPG.KBOX.GL.A.0013.260530T1500Z-260531T0000Z/
/O.NEW.KBOX.GL.W.0017.260530T0600Z-260531T0000Z/
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 NM-
226 PM EDT Thu May 28 2026

...GALE WARNING IN EFFECT FROM 2 AM TO 8 PM EDT SATURDAY...

* WHAT...Northeast winds 20 to 30 kt with gusts up to 40 kt and 
  seas 6 to 11 feet expected.

* WHERE...Coastal waters from Provincetown MA to Chatham MA to 
  Nantucket MA out 20 NM.

* WHEN...From 2 AM to 8 PM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.

&&

$$

ANZ255-256-290730-
/O.UPG.KBOX.GL.A.0013.260530T1500Z-260531T0000Z/
/O.NEW.KBOX.GL.W.0017.260530T0600Z-260531T0000Z/
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-
226 PM EDT Thu May 28 2026

...GALE WARNING IN EFFECT FROM 2 AM TO 8 PM EDT SATURDAY...

* WHAT...Northwest winds 25 to 35 kt with gusts up to 45 kt and 
  seas 5 to 8 feet expected.

* WHERE...In Massachusetts coastal waters, Coastal Waters 
  extending out to 25 NM South of Marthas Vineyard and 
  Nantucket. In Rhode Island coastal waters, Coastal Waters from 
  Montauk NY to Marthas Vineyard extending out to 20 NM South of 
  Block Island.

* WHEN...From 2 AM to 8 PM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.

&&

$$

ANZ280-290730-
/O.UPG.KBOX.GL.A.0013.260530T0900Z-260531T0000Z/
/O.NEW.KBOX.GL.W.0017.260530T0600Z-260531T0000Z/
Ocean Waters from the Merrimack River to Plymouth from 40 to
60 NM-
226 PM EDT Thu May 28 2026

...GALE WARNING IN EFFECT FROM 2 AM TO 8 PM EDT SATURDAY...

* WHAT...Northeast winds 20 to 30 kt with gusts up to 40 kt and 
  seas 6 to 11 feet expected.

* WHERE...Ocean Waters from the Merrimack River to Plymouth from 
  40 to 60 NM.

* WHEN...From 2 AM to 8 PM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.

&&

$$

ANZ281>283-290730-
/O.UPG.KBOX.GL.A.0013.260530T1500Z-260531T0000Z/
/O.NEW.KBOX.GL.W.0017.260530T0600Z-260531T0000Z/
Ocean Waters from Provincetown to Nantucket from 20 to 60 NM-
Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM-
Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM-
226 PM EDT Thu May 28 2026

...GALE WARNING IN EFFECT FROM 2 AM TO 8 PM EDT SATURDAY...

* WHAT...North winds 25 to 35 kt with gusts up to 45 kt and seas 
  7 to 12 feet expected.

* WHERE...Ocean Waters from Provincetown to Nantucket from 20 to 
  60 NM, Ocean Waters from Marthas Vineyard to Nantucket from 25 
  to 60 NM and Ocean Waters from Montauk NY to Marthas Vineyard 
  from 25 to 60 NM.

* WHEN...From 2 AM to 8 PM EDT Saturday.

* IMPACTS...Strong winds will cause hazardous seas which could 
  capsize or damage vessels and reduce visibility.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.

&&

$$

Area Forecast Discussion
National Weather Service Boston/Norton MA
145 AM EDT Thu May 28 2026

.WHAT HAS CHANGED...
No significant changes to the forecast.

&&

.KEY MESSAGES...

- A few showers and possibly a thunderstorm through early
  evening, mainly south of the MA Pike to the south coast.

- Cooler Thursday with scattered showers developing in the
  afternoon, especially across eastern MA.

- Broad cyclonic flow over northeastern North America will
  support unsettled weather in southern New England Friday
  through the middle of next week

&&

.DISCUSSION...
KEY MESSAGE 1...A few showers and possibly a thunderstorm
through early evening, mainly south of the MA Pike to the south
coast.

Cold front will be moving south across SNE this afternoon
reaching the south coast this evening. Weak instability develops
ahead of the front with MLCAPES 250-500 J/Kg. Instability is
weak but low level convergence with the front may be enough for
isolated low topped convection to develop later this afternoon
and evening, mainly south of the MA Pike. The 3km NAM and NSSL-
WRF are most aggressive with scattered storms developing while
HRRR, WRF-ARW and RRFS show little to no convection. One of the
main limiting factors is dry air in the mid levels which will
serve to suppress stronger updrafts from developing, especially
given just weak instability. So while we can't rule out a few
showers or a t-storm developing, coverage should be limited. Any
convection will end this evening as the front pushes south of
the coast. This will also clear out any stratus and fog that
develops over the Islands through this evening.

KEY MESSAGE 2...Cooler Thursday with scattered showers
developing in the afternoon, especially across eastern MA.

Cooler temps Thu in the post-frontal airmass as 925 mb temps
drop to 12-13C. Expect highs in the low-mid 70s, but likely
holding in the upper 60s along the eastern MA coast due to a NE
wind. A mid level shortwave rotates southward across the region
with an accompanying increase in moisture. Guidance is bullish
on scattered showers developing in the afternoon, especially
across eastern MA into RI as a coastal front sets up across
eastern MA along with a weak wave on the front which will
enhance convergence. The showwers will wind down Thu evening as
the shortwave moves to the east followed by subsidence.

KEY MESSAGE 3...Broad cyclonic flow over northeastern North
America will support unsettled weather in southern New England
Friday through the middle of next week

A broad upper-level trough roughly centered over eastern North
America/western North Atlantic Ocean will dominate the weather
pattern in southern New England between Friday and the middle of
next week. Several pulses of short-wave energy embedded in this
broad clyclonic flow will bring a pro-longed period of largely
unsettled weather.

AThe first pulse of short-wave energy digs through The Northeast
late Friday into Saturday bringing rounds of scattered precipitation
mailny to eastern MA and NH/ME. As this system exits southeast by
Saturday evening, we'll be left with somewhat seasonable conditions
for Sunday with a mix of sun and clouds.

Beyond Sunday we begin to see more spread in the global model
guidance. The consensus is for broad cyclonic flow to persist over
The Northeast with additional precpitation chances on Monday and
Tuesday. How long the cylonic upper-level flow meanders over The
Northeast is uncertain with some ensemble solutions supporting more
significant height rises by Wedensday and others supporting a later
departure by late next week. Temperature will be slightly below
normal during this stretch with daily highs/lows in the upper
60s/low 70s and 40s/50s between Saturday and Wednesday.

&&

.AVIATION /06Z THURSDAY THROUGH MONDAY/...
Forecaster Confidence Levels...

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

06Z TAF Update:

Through 12Z...High Confidence.

IFR stratus and fog over the Islands clearing out and becoming
VFR for a period toward 06z. Patchy BR possible closer to 12Z
for Cape/Islands. VFR elsewhere. N winds 6-12 kts.

Today...High Confidence. Moderate (Ceilings ACK).

VFR for most. Potential for periods of MVFR/IFR ceilings at ACK;
however, lower confidence. Scattered showers developing in the
afternoon, especially eastern MA/RI with mainly VFR cigs. NW
winds 10-15 kts with gusts 20 kts for the interior terminals
and N-NE 8-12 kts near the eastern MA coast with an ocassional
gust to 20 kts possible.

Thursday night...High confidence.

VFR. Light N-NW wind.

KBOS...High confidence in TAF.

KBDL...High confidence in TAF. Low risk for a brief shower after
20z.

Outlook /Friday through Monday/...

Friday: VFR. Breezy. Chance SHRA.

Friday Night: Mainly VFR, with local MVFR possible. Windy with
local gusts up to 35 kt. Chance SHRA, patchy BR.

Saturday: Mainly VFR, with local MVFR possible. Windy with
gusts up to 35 kt. Chance SHRA.

Saturday Night: VFR. Windy with local gusts up to 30 kt.

Sunday: VFR.

Sunday Night: VFR. Slight chance SHRA.

Monday: Mainly VFR, with local MVFR possible. Chance SHRA,
slight chance TSRA.

&&

.MARINE...
Forecaster Confidence Levels...

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

Through Thursday night...

Winds and seas below SCA thresholds. SW-W winds up to 20 kt will
shift to NW then N tonight. N-NE wind 5-15 kt Thu becoming N-NW Thu
night. A few showers or a t-storm may develop over the south coastal
waters through early evening. Scattered showers developing Thu
afternoon.

Outlook /Friday through Monday/...

Friday: Winds less than 25 kt. Chance of rain showers.

Friday Night: Low risk for Small Craft Advisory winds with
gusts up to 30 kt. Areas of seas approaching 5 ft. Rain
showers, slight chance of thunderstorms, patchy fog.

Saturday: Strong winds with gusts up to 40 kt. Areas of rough
seas. Chance of rain showers.

Saturday Night: Low risk for Small Craft Advisory winds with
areas of gusts up to 30 kt. Rough seas up to 11 ft.

Sunday: Winds less than 25 kt. Local rough seas.

Sunday Night: Winds less than 25 kt. Areas of seas approaching
5 ft. Chance of rain showers.

Monday: Winds less than 25 kt. Seas locally approaching 5 ft.
Chance of rain showers, slight chance of thunderstorms.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.

&&

DISCUSSION...KJC/RM
AVIATION...Mensch
MARINE...KJC/RM