Small Craft Advisory 72, NWS Boston/Norton, MA

477 
WHUS71 KBOX 200131
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
931 PM EDT Sun May 19 2019

ANZ237-200945-
/O.EXB.KBOX.SC.Y.0071.190520T1200Z-190521T1200Z/
Block Island Sound-
931 PM EDT Sun May 19 2019

...SMALL CRAFT ADVISORY IN EFFECT FROM 8 AM MONDAY TO 8 AM EDT
TUESDAY...

The National Weather Service in Boston/Norton has issued a Small
Craft Advisory, which is in effect from 8 AM Monday to 8 AM EDT
Tuesday.

* WINDS AND SEAS...Southwest 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,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ250-200945-
/O.EXT.KBOX.SC.Y.0071.000000T0000Z-190521T1200Z/
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
931 PM EDT Sun May 19 2019

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 8 AM EDT TUESDAY...

* WINDS AND SEAS...Southwest 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,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ230>236-251-200945-
/O.EXT.KBOX.SC.Y.0072.000000T0000Z-190521T1200Z/
Boston Harbor-Cape Cod Bay-Nantucket Sound-Vineyard Sound-
Buzzards Bay-Rhode Island Sound-Narragansett Bay-
Massachusetts Bay and Ipswich Bay-
931 PM EDT Sun May 19 2019

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 8 AM EDT TUESDAY...

* WINDS AND SEAS...Southwest winds 10 to 20 kt with gusts up to 
  30 kt. Seas 2 to 4 feet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Small Craft Advisory means that wind speeds of 25 to 33 knots,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ255-256-200945-
/O.CON.KBOX.SC.Y.0071.190520T0600Z-190521T1200Z/
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-
931 PM EDT Sun May 19 2019

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 2 AM MONDAY TO
8 AM EDT TUESDAY...

* WINDS AND SEAS...Southwest winds 10 to 20 kt with gusts up to 
  30 kt. Seas 4 to 6 feet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Small Craft Advisory means that wind speeds of 25 to 33 knots,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ254-200945-
/O.CON.KBOX.SC.Y.0071.000000T0000Z-190521T1200Z/
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
931 PM EDT Sun May 19 2019

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT
TUESDAY...

* WINDS AND SEAS...Southwest 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,
or seas 5 feet or greater, 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

527 
WHUS71 KBOX 200739
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
339 AM EDT Mon May 20 2019

ANZ250-201545-
/O.CON.KBOX.SC.Y.0071.000000T0000Z-190521T1200Z/
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
339 AM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT
TUESDAY...

* WINDS AND SEAS...Southwest 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,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ255-256-201545-
/O.CON.KBOX.SC.Y.0071.000000T0000Z-190521T1200Z/
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-
339 AM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT
TUESDAY...

* WINDS AND SEAS...Southwest 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,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ230>236-251-201545-
/O.CON.KBOX.SC.Y.0072.000000T0000Z-190521T1200Z/
Boston Harbor-Cape Cod Bay-Nantucket Sound-Vineyard Sound-
Buzzards Bay-Rhode Island Sound-Narragansett Bay-
Massachusetts Bay and Ipswich Bay-
339 AM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT
TUESDAY...

* WINDS AND SEAS...Southwest 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,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ254-201545-
/O.CON.KBOX.SC.Y.0071.000000T0000Z-190521T1200Z/
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
339 AM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT
TUESDAY...

* WINDS AND SEAS...Southwest 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,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ237-201545-
/O.CON.KBOX.SC.Y.0071.190520T1200Z-190521T1200Z/
Block Island Sound-
339 AM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 8 AM THIS MORNING
TO 8 AM EDT TUESDAY...

* WINDS AND SEAS...Southwest 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,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

Frank

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

019 
WHUS71 KBOX 201729
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
129 PM EDT Mon May 20 2019

ANZ250-210130-
/O.CON.KBOX.SC.Y.0071.000000T0000Z-190521T1200Z/
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
129 PM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY UNTIL 8 AM EDT TUESDAY...

* WINDS AND SEAS...Southwest 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,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ255-256-210130-
/O.CON.KBOX.SC.Y.0071.000000T0000Z-190521T1200Z/
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-
129 PM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY UNTIL 8 AM EDT TUESDAY...

* WINDS AND SEAS...Southwest 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,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ230>236-251-210130-
/O.CON.KBOX.SC.Y.0072.000000T0000Z-190521T1200Z/
Boston Harbor-Cape Cod Bay-Nantucket Sound-Vineyard Sound-
Buzzards Bay-Rhode Island Sound-Narragansett Bay-
Massachusetts Bay and Ipswich Bay-
129 PM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY UNTIL 8 AM EDT TUESDAY...

* WINDS AND SEAS...Southwest 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,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ254-210130-
/O.CON.KBOX.SC.Y.0071.000000T0000Z-190521T1200Z/
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
129 PM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY UNTIL 8 AM EDT TUESDAY...

* WINDS AND SEAS...Southwest winds 15 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,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ237-210130-
/O.CON.KBOX.SC.Y.0071.000000T0000Z-190521T1200Z/
Block Island Sound-
129 PM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY UNTIL 8 AM EDT TUESDAY...

* WINDS AND SEAS...West 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,
or seas 5 feet or greater, 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 201924
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
324 PM EDT Mon May 20 2019

ANZ230-251-202030-
/O.CAN.KBOX.SC.Y.0072.000000T0000Z-190521T1200Z/
Boston Harbor-Massachusetts Bay and Ipswich Bay-
324 PM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY IS CANCELLED...

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

Winds and seas are forecast to remain just below small craft 
advisory thresholds. Can't rule out a brief gust to 25 knots as 
the cold front sweeps through this evening. 

$$

ANZ250-210330-
/O.EXT.KBOX.SC.Y.0071.000000T0000Z-190521T0600Z/
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
324 PM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY UNTIL 2 AM EDT TUESDAY...

* WINDS AND SEAS...Southwest 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,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ254>256-210330-
/O.EXT.KBOX.SC.Y.0071.000000T0000Z-190522T1200Z/
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-
324 PM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY UNTIL 8 AM EDT WEDNESDAY...

* WINDS AND SEAS...Westerly winds 10 to 20 kt with gusts up to 25 kt.
  Seas 4 to 7 feet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Small Craft Advisory means that wind speeds of 25 to 33 knots,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ231>236-210330-
/O.EXT.KBOX.SC.Y.0072.000000T0000Z-190521T0600Z/
Cape Cod Bay-Nantucket Sound-Vineyard Sound-Buzzards Bay-
Rhode Island Sound-Narragansett Bay-
324 PM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY UNTIL 2 AM EDT TUESDAY...

* WINDS AND SEAS...Southwest 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,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ237-210330-
/O.EXT.KBOX.SC.Y.0071.000000T0000Z-190521T0600Z/
Block Island Sound-
324 PM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY UNTIL 2 AM EDT TUESDAY...

* WINDS AND SEAS...Southwest 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,
or seas 5 feet or greater, 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

137 
WHUS71 KBOX 210202
MWWBOX

URGENT - MARINE WEATHER MESSAGE
National Weather Service Boston/Norton MA
1002 PM EDT Mon May 20 2019

ANZ250-211015-
/O.CAN.KBOX.SC.Y.0071.000000T0000Z-190521T0600Z/
/O.NEW.KBOX.SC.Y.0073.190521T1800Z-190522T1200Z/
Coastal waters east of Ipswich Bay and the Stellwagen Bank
National Marine Sanctuary-
1002 PM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM TUESDAY TO 8 AM EDT
WEDNESDAY...

The National Weather Service in Boston/Norton has issued a Small
Craft Advisory, which is in effect from 2 PM Tuesday to 8 AM EDT
Wednesday. 

* WINDS AND SEAS...Northwest winds 15 to 25 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,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ254-211015-
/O.CAN.KBOX.SC.Y.0071.000000T0000Z-190522T1200Z/
/O.NEW.KBOX.SC.Y.0073.190521T1800Z-190522T1200Z/
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
1002 PM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM TUESDAY TO 8 AM EDT
WEDNESDAY...

The National Weather Service in Boston/Norton has issued a Small
Craft Advisory, which is in effect from 2 PM Tuesday to 8 AM EDT
Wednesday.

* WINDS AND SEAS...West winds 15 to 25 kt. Seas 5 to 8 feet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Small Craft Advisory means that wind speeds of 25 to 33 knots,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ236-211015-
/O.CAN.KBOX.SC.Y.0072.000000T0000Z-190521T0600Z/
/O.EXB.KBOX.SC.Y.0071.190521T1800Z-190522T0000Z/
Narragansett Bay-
1002 PM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM TO 8 PM EDT TUESDAY...

The National Weather Service in Boston/Norton has issued a Small
Craft Advisory, which is in effect from 2 PM to 8 PM EDT Tuesday.

* WINDS AND SEAS...West winds 10 to 20 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,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ231>235-210315-
/O.CAN.KBOX.SC.Y.0072.000000T0000Z-190521T0600Z/
Cape Cod Bay-Nantucket Sound-Vineyard Sound-Buzzards Bay-
Rhode Island Sound-
1002 PM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY IS CANCELLED...

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

$$

ANZ237-210315-
/O.CAN.KBOX.SC.Y.0071.000000T0000Z-190521T0600Z/
Block Island Sound-
1002 PM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY IS CANCELLED...

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

$$

ANZ251-211015-
/O.EXB.KBOX.SC.Y.0071.190521T1800Z-190522T1200Z/
Massachusetts Bay and Ipswich Bay-
1002 PM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM TUESDAY TO 8 AM EDT
WEDNESDAY...

The National Weather Service in Boston/Norton has issued a Small
Craft Advisory, which is in effect from 2 PM Tuesday to 8 AM EDT
Wednesday.

* WINDS AND SEAS...Northwest winds 15 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,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ230-211015-
/O.EXB.KBOX.SC.Y.0071.190521T1800Z-190522T0600Z/
Boston Harbor-
1002 PM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY IN EFFECT FROM 2 PM TUESDAY TO 2 AM EDT
WEDNESDAY...

The National Weather Service in Boston/Norton has issued a Small
Craft Advisory, which is in effect from 2 PM Tuesday to 2 AM EDT
Wednesday.

* 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,
or seas 5 feet or greater, are expected to produce hazardous wave
conditions to small craft. Inexperienced mariners, especially
those operating smaller vessels, should avoid navigating in these
conditions.

&&

$$

ANZ255-256-211015-
/O.CON.KBOX.SC.Y.0071.000000T0000Z-190522T1200Z/
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-
1002 PM EDT Mon May 20 2019

...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 8 AM EDT
WEDNESDAY...

* WINDS AND SEAS...West 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,
or seas 5 feet or greater, 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

Area Forecast Discussion
National Weather Service Boston/Norton MA
753 PM EDT Sun May 19 2019

.SYNOPSIS...
Additional showers are possible again tonight. Summer-like heat
and humidity is forecast for Monday. A cold front will trigger
scattered strong thunderstorms Monday afternoon and early
evening. This will be followed by dry, windy and cooler weather
Tuesday. Dry weather continues Wednesday into Thursday afternoon
with less wind and temperatures moderating back to seasonably
mild levels. A period or two of unsettled weather may return
late Thursday into Saturday, but a washout is not expected.

&&

.NEAR TERM /UNTIL 6 AM MONDAY MORNING/...
7 pm update...

Satellite shows marine clouds expanding over Southern New
England, reaching almost to the route 2 corridor in Nrn Mass.
Just far northern MA as well as the Outer Cape and Nantucket
that were free of the clouds as of 7 PM. With higher dewpoints
moving up overnight, we expect these clouds to expand over the
region during the night.

Region radar shows one area of showers/storms moving into
central VT, another in Eastern PA moving toward CT. A couple of
widely scattered showers in between. Expect this to move into
our western areas of MA and CT around 9 pm. At that point it
runs into the marine layer, as depicted by the expanding cloud
layer now over Southern New England, and this will draw down the
support for thunder. At most, an elevated layer may persist for
a couple of hours early tonight. The trend should be toward
showers moving across our area during the night.

Previous discussion...

To our west regional radar shows showers and strong to severe
thunderstorms have popped up in western New York where skies have
been clear much of the day and instability is maximized (CAPE values
~2500). This instability decreases rapidly over the next 6 hours and
storms are expected to weaken as the remnants approach New
England late this evening. A Severe Thunderstorm Watch has been
issued for areas to our west including Berkshire county but our
CWA has not been included given weak instability parameters.
Another round of showers and scattered thunderstorms makes its
way through overnight, but instability is weak (CAPE of a few
hundred J/kg) and elevated, so any thunderstorms aren't expected
to be severe. Some locally heavy downpours are possible
overnight, with PWATs reaching >1.5". Low temperatures will be
noticeably warmer tonight, in the 50s and 60s, ~10F above
average. Areas of dense fog are likely to develop, mainly along
the south coast.

&&

.SHORT TERM /6 AM MONDAY MORNING THROUGH MONDAY NIGHT/...
The main focus of the short term period will of course be the
potential for our first severe weather event of the Spring. Monday
southern New England will feel positively summer-like in the warm
sector of a surface low moving across the Great Lakes region. Return
flow tapping into subtropical moisture will bring temperatures in
the 70s-80s and dewpoints in the low 60s. Winds are breezy out
of the southwest. Model soundings indicate potential to mix down
gusts of 25-30kts, peaking in the afternoon.

Things continue to come together for a severe weather potential
by the afternoon. First we'll start with the good, then mention
a few inhibitors that are keeping some uncertainty in the
forecast as to how intense and widespread any storms will be.
Lift is there, if marginal. First and foremost, a cold front
sweeps through from the west as our primary source of lift, but
at 300 mb we're also placed beneath the RRQ of an upper level
jet which will assist in some synoptic lift, though moreso to
our north. Looking at 850-500mb omega Monday afternoon, values
are decent, but again stronger over VT/NH. We'll have ample
instability to work with by afternoon/evening. MUCAPE values on
the order of 1000-2000 J/kg and low level lapse rates near 8
C/km are centered over western/central MA/CT, where the best
chance of severe storms lies. For strong to severe storms we
want sustained updrafts, and the necessary shear values are
there. 0-6km bulk shear approaches 50kts with 0-1 km shear
>20kts. That being said, HREF guidance indicates that the best
updraft helicity will be centered over central NH, with lesser
values extending over northern and northwest MA. This, together
with the westward placement of greatest instability means those
in western MA/CT would stand the best chance of seeing
significant storms tomorrow. Low level lapse rates indicate a
threat of strong damaging winds along with large hail. Though a
low probability, the chance of a tornado exists, given said low
level shear and 0-1 SRH values near 150. Finally, moisture is
the biggest question for tomorrow. A necessary ingredient for
widespread storms, it may be limited at the mid levels by the
time the best instability moves in. The NAM has now joined the
GFS and EC in showing drying aloft coincident with the best
surface based instability. This could have the effect of keeping
storms low topped and limiting intensity and areal coverage.
That being said, even if coverage is sparse, with these
convective parameters, any storms that to strengthen have the
potential to be very damaging. Another thing we'll have to watch
overnight into the morning hours will be how quickly the
morning rain/clouds clear out. If we get another situation like
today where showers linger longer than expected, it could limit
our destabilization. Southeast of the BOS-PVD corridor,
southwest winds off the 50 degree ocean will keep things more
stable and storms weaker. The cold front passes Monday night
bringing gusty winds out of the northwest and cooler lows in the
40s and 50s.

&&

.LONG TERM /TUESDAY THROUGH SUNDAY/...
Big Picture...

The upper pattern through next weekend becomes mostly high-
amplitude with a ridge over the Eastern USA and a trough/closed
low over the Western USA, and another building ridge over the
East Pacific. Shortwaves in such a flow will take the scenic
route across North America...south along the Pacific Coast, then
turning northeast across Northwest Mexico and the Plains/Great
Lakes, then turning southeast across New England.

Model consensus shows one shortwave moving across New England
Tuesday, then off to the east. A second shortwave moves over the
top of the ridge and then across New England Thursday night. A
third shortwave moves over the top of the ridge and across
Eastern Canada Saturday. Timing on these last two shortwaves is
approximate.

Upper heights/temperatures trend a little cooler Tuesday, but
return to higher/milder levels through the weekend. This would
suggest seasonably mild temperatures.

There have been differences run-to-run on shortwave timing,
which is not surprising. But the general pattern looks
consistant through the week with differences among models
developing next weekend. Confidence is high Tuesday-Wednesday,
then moderate due to shortwave timing Thursday to Sunday.

Concerns...

Tuesday-Wednesday...

Upper low and cold pool...-23C at 500 mb...move across Northern
New England Tuesday with a supporting 150-kt jet moving across
Southern New England. Cold pool moisture is concentrated in the
north, but some extends south into at least areas north of the
Mass Pike. Low level lapse rates over Srn New England become
inpressive, but mid level rates show little of interest. Perhaps
no surprise that model rainfall is limited to ME/NH/VT with
nothing for our area. We continue to expect diurnal clouds
Tuesday, heaviest over the hills and near the NH border. Temps
aloft support max sfc temps in the upper 50s and 60s. Min temps
should be in the 40s and low 50s.

Winds will be a concern for Tuesday. Cold advection aloft and
daytime heating will promote the strong low-level lapse rates
and promote mixing to 800 mb...which should bring northwest wind
gusts around 35-kt to the surface.

High pressure builds over the region Wednesday, so expect a
fair-weather day with north winds gusting 15-20 kt. Temps aloft
4-6C should support max sfc temps in the 60s to around 70,
cooler Cape adn Islands. Min temps should repeat in the 40s and
low 50s.

Thursday to Sunday...

As noted above, two shortwaves move through the New England
area, and each is sufficient to support a period of showers.
Current model timing would suggest one period is Thursday
afternoon and night, the second period is Friday night and
Saturday. Given this is in the late part of the forecast, the
timing will likely shift a little and so should not be
interpreted literally. Temperatures should be milder during this
time with highs in the upper 60s and 70s and lows mostly in the
50s.

&&

.AVIATION /00Z MONDAY THROUGH FRIDAY/...
Forecaster Confidence Levels...

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

Short Term /through Monday Night/...

Tonight...Moderate confidence.

Marine clouds have spread over the region with ceilings
1500-2500 feet. Expect these clouds to linger through the night
and possibly lower as higher humidity air works in from the
south.

Thunderstorms over NY and PA are moving northeast and will enter
the region around 00-01Z. The marine airmass will be too stable
to support these storms as they move into Southern New England.
Expect the storms to diminish to showers, with showers moving
across the region overnight bringing vsbys down to 3-4 miles.

Areas of fog may develop as the higher humidity air establishes.
This would bring lower vsbys especially along the south coast.

Monday...Moderate confidence.

Any leftover showers should move offshore early in the day. Most
of the morning will feature low clouds breaking/lifting to VFR,
with the possible exception of the Islands and immediate South
Coast where low clouds/IFR may linger. Gusty south-southwest
winds will be in place during the day with gusts to 25 kt.

Thunderstorms are expected to redevelop Monday afternoon in
Western New England. There is some hint of negative factors that
would interfere with storm development, but enough positive
factors to expect storms to form. Expect brief MVFR near any
storms and IFR under them. Most likely timing would be from
17Z/1 PM to 01Z/9 PM.

Monday night...Cold front moves through Southern New England,
with showers/thunder diminishing after it moves through. Winds
will shift out of the northwest with gusts 20-25 kt. Expect
conditions to improve to VFR all areas.

KBOS Terminal...Moderate to high confidence in TAF.

KBDL Terminal...Moderate to high confidence in TAF.

Outlook /Tuesday through Friday/...

Tuesday: VFR. Windy with gusts up to 30 kt.

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

Wednesday: VFR. Breezy.

Wednesday Night: VFR.

Thursday: Mainly VFR, with local MVFR possible. Slight chance
SHRA.

Thursday Night: Mainly MVFR, with local IFR possible. Chance
SHRA, patchy BR.

Friday: Mainly MVFR, with areas VFR possible. Slight chance
SHRA.

&&

.MARINE...
Forecaster Confidence Levels...

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

Short Term /through Monday Night/...

Tonight...High confidence. South to southwest winds will gust
to 20 kt. Scattered showers and isolated thunderstorms. Small
Craft Advisories end along the nearshore, but are in effect for
all outer waters as seas build to 5 ft. Areas of dense fog may
reduce visibility to below 1 nm, especially south coast.

Monday...High confidence. Small Craft Advisories continue for
the outer waters with southwest winds gusting to 25 kts and seas
building up to 6 ft in the southern outer waters. Scattered
thunderstorms possible toward evening. Visibility reduced to 1
to 3 nm in fog, locally below 1 nm in the morning.

Monday night...High confidence. Winds becoming NW gusting to
20kts. Seas 3-6

Outlook /Tuesday through Friday/...

Tuesday: Low risk for Small Craft Advisory winds with gusts up
to 30 kt. Areas of seas approaching 5 ft.

Tuesday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Areas of seas approaching 5 ft.

Wednesday: Low risk for Small Craft Advisory winds with gusts
up to 25 kt. Seas locally approaching 5 ft.

Wednesday Night through Thursday: Winds less than 25 kt.

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

Friday: Winds less than 25 kt. Local rough seas. Slight chance
of rain showers.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Small Craft Advisory until 8 PM EDT this evening for
     ANZ230>236-251.
     Small Craft Advisory until 11 PM EDT Monday for ANZ250.
     Small Craft Advisory until 8 AM EDT Tuesday for ANZ254.
     Small Craft Advisory from 2 AM Monday to 8 AM EDT Tuesday for
     ANZ255-256.

&&

SYNOPSIS...WTB/BW
NEAR TERM...WTB/BW
SHORT TERM...BW
LONG TERM...WTB
AVIATION...WTB/BW
MARINE...WTB/BW

Hazardous Weather Outlook
National Weather Service Boston/Norton MA
313 PM EDT Sun May 19 2019

CTZ002>004-MAZ002>024-026-RIZ001>008-201915-
Hartford CT-Tolland CT-Windham CT-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-Northwest Providence RI-
Southeast Providence RI-Western Kent RI-Eastern Kent RI-Bristol RI-
Washington RI-Newport RI-Block Island RI-
313 PM EDT Sun May 19 2019

This Hazardous Weather Outlook is for northern Connecticut, all of
Massachusetts east of Berkshire County, and Rhode Island.

.DAY ONE...Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Monday...

A few strong to severe thunderstorms are possible between
2 and 9 pm Monday to the northwest of the Boston to Providence
corridor. The highest risk will be across interior Massachusetts and
northern Connecticut.

The main threats with any severe thunderstorms would be localized
damaging wind gusts and large hail. There also is a low probability
for a tornado. Lastly, brief torrential rainfall may result in
localized street flooding.

Tuesday...

There is the low risk that a wind advisory might be needed for
portions of the region, due to strong northwest wind gusts.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ230>237-250-251-254>256-201915-
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-
313 PM EDT Sun May 19 2019

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

.DAY ONE...Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Northwest wind gusts to near gale force are possible near shore
Tuesday into Tuesday evening.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

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