Winter Storm Warning 4, NWS Boston/Norton, MA

445 
WWUS41 KBOX 180300
WSWBOX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Boston/Norton MA
1000 PM EST Sun Feb 17 2019

MAZ017>021-RIZ001>005-181100-
/O.CON.KBOX.WS.W.0004.190218T0400Z-190218T2100Z/
Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-
Southern Bristol MA-Southern Plymouth MA-Northwest Providence RI-
Southeast Providence RI-Western Kent RI-Eastern Kent RI-
Bristol RI-
Including the cities of Taunton, Brockton, Plymouth, Fall River, 
New Bedford, Mattapoisett, Foster, Smithfield, Providence, 
Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, 
and Bristol
1000 PM EST Sun Feb 17 2019

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM EST MONDAY...

* WHAT...Heavy snow expected. Total snow accumulations of 4 to 7 
  inches expected.

* WHERE...Portions of southeastern Massachusetts and northern 
  Rhode Island.

* WHEN...From 11 PM this evening to 4 PM EST Monday.

* ADDITIONAL DETAILS...Heaviest snow occurs after midnight into 
  mid morning. The result will be hazardous travel for the morning
  commute with snow covered roads and poor visibility. Generally 
  lighter snow will linger later in the morning and afternoon, but
  pockets of moderate snow will still be possible especially 
  across the southeast Massachusetts coast.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. 

&&

$$

CTZ002>004-MAZ009-011-012-181100-
/O.CON.KBOX.WW.Y.0011.000000T0000Z-190218T2100Z/
Hartford CT-Tolland CT-Windham CT-Western Hampden MA-
Eastern Hampden MA-Southern Worcester MA-
Including the cities of Hartford, Windsor Locks, Union, Vernon, 
Putnam, Willimantic, Blandford, Springfield, Milford, 
and Worcester
1000 PM EST Sun Feb 17 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST
MONDAY...

* WHAT...Snow expected. Total snow accumulations of 3 to 6 
  inches expected.

* WHERE...Northern Connecticut as well as southwest and south 
  central Massachusetts.

* WHEN...From 10 PM this evening to 4 PM EST Monday.

* ADDITIONAL DETAILS...Heaviest snow occurs after midnight into
  mid morning. The result will be hazardous travel for the 
  morning commute with snow covered roads and poor visibility. 
  Generally lighter snow will linger later in the morning and 
  afternoon, but pockets of moderate snow will still be possible 
  especially across the Worcester Hills.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving. 

&&

$$

MAZ007-013>016-181100-
/O.CON.KBOX.WW.Y.0011.190218T0500Z-190218T2100Z/
Eastern Essex MA-Western Norfolk MA-Southeast Middlesex MA-
Suffolk MA-Eastern Norfolk MA-
Including the cities of Gloucester, Foxborough, Norwood, 
Cambridge, Boston, and Quincy
1000 PM EST Sun Feb 17 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST
MONDAY...

* WHAT...Snow expected. Total snow accumulations of 3 to 6 
  inches expected.

* WHERE...Greater Boston and the North Shore.

* WHEN...From midnight tonight to 4 PM EST Monday.

* ADDITIONAL DETAILS...Periods of snow expected after midnight 
  into Monday afternoon. This will result in hazardous travel with
  snow covered roads and poor visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving. 

&&

$$

MAZ022>024-RIZ006>008-181100-
/O.CON.KBOX.WW.Y.0011.190218T0400Z-190218T2100Z/
Barnstable MA-Dukes MA-Nantucket MA-Washington RI-Newport RI-
Block Island RI-
Including the cities of Chatham, Falmouth, Provincetown, 
Vineyard Haven, Nantucket, Narragansett, Westerly, Newport, 
and New Shoreham
1000 PM EST Sun Feb 17 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST
MONDAY...

* WHAT...Wet snow expected which will change to rain or sleet by 
  early to mid morning Monday. Total snow accumulations of 1 to 
  4 inches expected.

* WHERE...In Massachusetts, Dukes MA and Nantucket MA Counties. 
  In Rhode Island, Block Island RI County.

* WHEN...From 11 PM this evening to 4 PM EST Monday.

* ADDITIONAL DETAILS...The bulk of the snow will during the
  morning hours. The snow will then change to mainly rain and
  sleet by mid morning. Precipitation should then change back to 
  lighter snow during the afternoon, but any additional 
  accumulations should be an inch or less.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving. 

&&

$$

MAZ002>006-008-010-026-181100-
/O.CON.KBOX.WW.Y.0011.190218T0500Z-190218T2100Z/
Western Franklin MA-Eastern Franklin MA-Northern Worcester MA-
Central Middlesex MA-Western Essex MA-Western Hampshire MA-
Eastern Hampshire MA-Northern Middlesex MA-
Including the cities of Charlemont, Greenfield, Orange, Barre, 
Fitchburg, Framingham, Lowell, Lawrence, Chesterfield, Amherst, 
Northampton, and Ayer
1000 PM EST Sun Feb 17 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST
MONDAY...

* WHAT...Snow expected. Total snow accumulations of 2 to 5 
  inches expected.

* WHERE...Most of Massachusetts that is located north of the 
  Massachusetts turnpike.

* WHEN...From midnight tonight to 4 PM EST Monday.

* ADDITIONAL DETAILS...Periods of snow expected early morning 
  into Monday afternoon. This will result in hazardous travel with
  snow covered roads and poor visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving. 

&&

$$

232 
WWUS41 KBOX 180913
WSWBOX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Boston/Norton MA
413 AM EST Mon Feb 18 2019

MAZ017>021-RIZ001>005-181715-
/O.CON.KBOX.WS.W.0004.000000T0000Z-190218T2100Z/
Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-
Southern Bristol MA-Southern Plymouth MA-Northwest Providence RI-
Southeast Providence RI-Western Kent RI-Eastern Kent RI-
Bristol RI-
Including the cities of Taunton, Brockton, Plymouth, Fall River, 
New Bedford, Mattapoisett, Foster, Smithfield, Providence, 
Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, 
and Bristol
413 AM EST Mon Feb 18 2019

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM EST THIS
AFTERNOON...

* WHAT...Periods of moderate snow expected. Additional snowfall
  amounts of 2-4 inches are possible.

* WHERE...Portions of southeastern Massachusetts and northern 
  Rhode Island.

* WHEN...Through 4PM.

* ADDITIONAL DETAILS...Heaviest snow will continue through mid
  morning. A risk for hazardous travel for the morning commute
  with snow covered roads and poor visibility. Lighter snow, mixed
  with occasional freezing drizzle is then expected into the
  evening hours before ending.  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency. 

&&

$$

CTZ002>004-MAZ009-011-012-181715-
/O.CON.KBOX.WW.Y.0011.000000T0000Z-190218T2100Z/
Hartford CT-Tolland CT-Windham CT-Western Hampden MA-
Eastern Hampden MA-Southern Worcester MA-
Including the cities of Hartford, Windsor Locks, Union, Vernon, 
Putnam, Willimantic, Blandford, Springfield, Milford, 
and Worcester
413 AM EST Mon Feb 18 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST THIS
AFTERNOON...

* WHAT...Snow expected. Total snow accumulations of 3 to 6 
  inches expected.

* WHERE...Northern Connecticut as well as southwest and south 
  central Massachusetts.

* WHEN...Through late afternoon.

* ADDITIONAL DETAILS...Snow becomes lighter later in the morning 
  and afternoon, but pockets of moderate snow will still be 
  possible especially across the Worcester Hills.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving. 

&&

$$

MAZ007-013>016-181715-
/O.CON.KBOX.WW.Y.0011.000000T0000Z-190218T2100Z/
Eastern Essex MA-Western Norfolk MA-Southeast Middlesex MA-
Suffolk MA-Eastern Norfolk MA-
Including the cities of Gloucester, Foxborough, Norwood, 
Cambridge, Boston, and Quincy
413 AM EST Mon Feb 18 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST THIS
AFTERNOON...

* WHAT...Snow expected. Total snow accumulations of 3 to 6 
  inches expected.

* WHERE...Greater Boston and the North Shore.

* WHEN...Through late afternoon.

* ADDITIONAL DETAILS...Light snow continues today, potentially
  mixing with freezing drizzle. This will result in hazardous 
  travel with snow covered roads and poor visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving. 

&&

$$

MAZ022>024-RIZ006>008-181715-
/O.CON.KBOX.WW.Y.0011.000000T0000Z-190218T2100Z/
Barnstable MA-Dukes MA-Nantucket MA-Washington RI-Newport RI-
Block Island RI-
Including the cities of Chatham, Falmouth, Provincetown, 
Vineyard Haven, Nantucket, Narragansett, Westerly, Newport, 
and New Shoreham
413 AM EST Mon Feb 18 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST THIS
AFTERNOON...

* WHAT...Wet snow expected which will change to rain or sleet by
  this morning. Total snow accumulations of 1 to 4 inches 
  expected.

* WHERE...In Massachusetts, Dukes MA and Nantucket MA Counties. 
  In Rhode Island, Block Island RI County.

* WHEN...Through late afternoon.

* ADDITIONAL DETAILS...The snow will change to mainly rain and 
  sleet by mid morning. Precipitation should then change back to 
  lighter snow during the afternoon, but any additional 
  accumulations should be an inch or less.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving. 

&&

$$

MAZ002>006-008-010-026-181715-
/O.CON.KBOX.WW.Y.0011.000000T0000Z-190218T2100Z/
Western Franklin MA-Eastern Franklin MA-Northern Worcester MA-
Central Middlesex MA-Western Essex MA-Western Hampshire MA-
Eastern Hampshire MA-Northern Middlesex MA-
Including the cities of Charlemont, Greenfield, Orange, Barre, 
Fitchburg, Framingham, Lowell, Lawrence, Chesterfield, Amherst, 
Northampton, and Ayer
413 AM EST Mon Feb 18 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST THIS
AFTERNOON...

* WHAT...Snow continues. Total snow accumulations of 2 to 5 
  inches expected.

* WHERE...Most of Massachusetts that is located north of the 
  Massachusetts turnpike.

* WHEN...Through late afternoon.

* ADDITIONAL DETAILS...Periods of snow expected through 
  afternoon. This will result in hazardous travel with snow 
  covered roads and poor visibility at times.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving. 

&&

$$

541 
WWUS41 KBOX 181512
WSWBOX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Boston/Norton MA
1012 AM EST Mon Feb 18 2019

MAZ017-020-021-RIZ001>005-182100-
/O.CAN.KBOX.WS.W.0004.000000T0000Z-190218T2100Z/
/O.EXA.KBOX.WW.Y.0011.000000T0000Z-190218T2100Z/
Northern Bristol MA-Southern Bristol MA-Southern Plymouth MA-
Northwest Providence RI-Southeast Providence RI-Western Kent RI-
Eastern Kent RI-Bristol RI-
Including the cities of Taunton, Fall River, New Bedford, 
Mattapoisett, Foster, Smithfield, Providence, Coventry, 
West Greenwich, East Greenwich, Warwick, West Warwick, 
and Bristol
1012 AM EST Mon Feb 18 2019

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 4 PM EST THIS
AFTERNOON...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...Light snow, which may mix with freezing drizzle at 
  times. Additional snow accumulations of up to one inch.

* WHERE...Portions of southeastern Massachusetts and Rhode 
  Island.

* WHEN...Until 4 PM EST this afternoon.

* ADDITIONAL DETAILS...Plan on hazardous travel conditions,
  especially on untreated roads. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving. 

&&

$$

MAZ023-024-RIZ008-181615-
/O.CAN.KBOX.WW.Y.0011.000000T0000Z-190218T2100Z/
Dukes MA-Nantucket MA-Block Island RI-
Including the cities of Vineyard Haven, Nantucket, 
and New Shoreham
1012 AM EST Mon Feb 18 2019

...WINTER WEATHER ADVISORY IS CANCELLED...

$$

MAZ018-019-182100-
/O.CON.KBOX.WS.W.0004.000000T0000Z-190218T2100Z/
Western Plymouth MA-Eastern Plymouth MA-
Including the cities of Brockton and Plymouth
1012 AM EST Mon Feb 18 2019

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM EST THIS
AFTERNOON...

* WHAT...Periods of moderate snow expected. Additional snowfall
  amounts of 1 to 3 inches are possible.

* WHERE...Portions of southeastern Massachusetts and northern 
  Rhode Island.

* WHEN...Through 4 PM EST this afternoon.

* ADDITIONAL DETAILS...Plan on hazardous travel conditions,
  especially on untreated roads. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning for snow means severe winter weather
conditions will make travel very hazardous or impossible. If you
must travel, keep an extra flashlight, food and water in your
vehicle in case of an emergency.

&&

$$

CTZ002>004-MAZ009-011-012-182100-
/O.CON.KBOX.WW.Y.0011.000000T0000Z-190218T2100Z/
Hartford CT-Tolland CT-Windham CT-Western Hampden MA-
Eastern Hampden MA-Southern Worcester MA-
Including the cities of Hartford, Windsor Locks, Union, Vernon, 
Putnam, Willimantic, Blandford, Springfield, Milford, 
and Worcester
1012 AM EST Mon Feb 18 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST THIS
AFTERNOON...

* WHAT...Occasional light snow, possibly mixed with freezing 
  drizzle at times. Additional snow accumulations up to an inch.
 
* WHERE...Northern Connecticut as well as southwest and south 
  central Massachusetts.

* WHEN...Through late afternoon.

* ADDITIONAL DETAILS...Plan on hazardous travel conditions,
  especially on untreated roads. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving.

&&

$$

MAZ007-013>016-182100-
/O.CON.KBOX.WW.Y.0011.000000T0000Z-190218T2100Z/
Eastern Essex MA-Western Norfolk MA-Southeast Middlesex MA-
Suffolk MA-Eastern Norfolk MA-
Including the cities of Gloucester, Foxborough, Norwood, 
Cambridge, Boston, and Quincy
1012 AM EST Mon Feb 18 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST THIS
AFTERNOON...

* WHAT...Snow expected. Additional accumulation of an inch or 2.
 
* WHERE...Greater Boston and southwest suburbs and the North 
  Shore.

* WHEN...Through late afternoon.

* ADDITIONAL DETAILS...Plan on hazardous travel conditions,
  especially on untreated roads.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving.

&&

$$

MAZ022-182100-
/O.CON.KBOX.WW.Y.0011.000000T0000Z-190218T2100Z/
Barnstable MA-
Including the cities of Chatham, Falmouth, and Provincetown
1012 AM EST Mon Feb 18 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST THIS
AFTERNOON...

* WHAT...Light snow, which may mix with rain at times. Little
  additional accumulation, except around an inch across portions 
  of the outer Cape. 

* WHERE...Cape Cod.

* WHEN...Through late afternoon.

* ADDITIONAL DETAILS...Plan on hazardous travel conditions,
  especially on untreated roads.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.

&&

$$

MAZ002>006-008-010-026-182100-
/O.CON.KBOX.WW.Y.0011.000000T0000Z-190218T2100Z/
Western Franklin MA-Eastern Franklin MA-Northern Worcester MA-
Central Middlesex MA-Western Essex MA-Western Hampshire MA-
Eastern Hampshire MA-Northern Middlesex MA-
Including the cities of Charlemont, Greenfield, Orange, Barre, 
Fitchburg, Framingham, Lowell, Lawrence, Chesterfield, Amherst, 
Northampton, and Ayer
1012 AM EST Mon Feb 18 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST THIS
AFTERNOON...

* WHAT...Occasional light snow. Additional accumulations around 
  an inch expected.

* WHERE...Most of Massachusetts that is located north of the 
  Massachusetts turnpike.

* WHEN...Through late afternoon.

* ADDITIONAL DETAILS...Plan on hazardous travel conditions,
  especially on untreated roads.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause primarily travel difficulties. Expect snow covered roads
and limited visibilities, and use caution while driving.

&&

$$

RIZ006-007-182100-
/O.CON.KBOX.WW.Y.0011.000000T0000Z-190218T2100Z/
Washington RI-Newport RI-
Including the cities of Narragansett, Westerly, and Newport
1012 AM EST Mon Feb 18 2019

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM EST THIS
AFTERNOON...

* WHAT...Occasional light snow, mixed with rain or freezing
  drizzle at times. Little additional snow accumulation expected.

* WHERE...Southern Rhode Island.

* WHEN...Through late afternoon.

* ADDITIONAL DETAILS...Plan on hazardous travel conditions,
  especially on untreated roads.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of snow, sleet or
freezing rain will cause travel difficulties. Expect slippery
roads and limited visibilities, and use caution while driving.

&&

$$

749 
WWUS41 KBOX 181930
WSWBOX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Boston/Norton MA
230 PM EST Mon Feb 18 2019

MAZ018-019-182030-
/O.CAN.KBOX.WS.W.0004.000000T0000Z-190218T2100Z/
Western Plymouth MA-Eastern Plymouth MA-
Including the cities of Brockton and Plymouth
230 PM EST Mon Feb 18 2019

...WINTER STORM WARNING IS CANCELLED...

Light snow will taper off and end by late afternoon or early  
evening. Any additional accumulation will be less than an inch.

$$

CTZ002>004-MAZ002>017-020>022-026-RIZ001>007-182030-
/O.CAN.KBOX.WW.Y.0011.000000T0000Z-190218T2100Z/
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-
Southern Bristol MA-Southern Plymouth MA-Barnstable MA-
Northern Middlesex MA-Northwest Providence RI-
Southeast Providence RI-Western Kent RI-Eastern Kent RI-
Bristol RI-Washington RI-Newport RI-
Including the cities of Hartford, Windsor Locks, Union, Vernon, 
Putnam, Willimantic, Charlemont, Greenfield, Orange, Barre, 
Fitchburg, Framingham, Lowell, Lawrence, Gloucester, 
Chesterfield, Blandford, Amherst, Northampton, Springfield, 
Milford, Worcester, Foxborough, Norwood, Cambridge, Boston, 
Quincy, Taunton, Fall River, New Bedford, Mattapoisett, Chatham, 
Falmouth, Provincetown, Ayer, Foster, Smithfield, Providence, 
Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, 
Bristol, Narragansett, Westerly, and Newport
230 PM EST Mon Feb 18 2019

...WINTER WEATHER ADVISORY IS CANCELLED...

Light snow will end by late afternoon, but linger over Cape Cod
into the early evening. Any additional accumulation will be less 
than an inch.

$$

Area Forecast Discussion
National Weather Service Boston/Norton MA
907 AM EST Sun Feb 17 2019

.SYNOPSIS...
High pressure will maintain dry weather through today. Accumulating
snow overspreads the region late this evening and overnight from
west to east and continues into Monday, in association with a low
pressure tracking south of New England. Drier and colder conditions
follow Monday night into Wednesday. Another low approaches the
region which will bring snow Wednesday night, likely changing to a
wintry mix inland, and over to rain along the coast before ending
Thursday. Dry conditions should return Friday into Saturday.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...

905 am update...

Previous forecast is on track. A ridge of high pressure will
result in plenty of sunshine into the afternoon along with
light winds. High temperatures will recover into the middle to
upper 30s by mid afternoon.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM MONDAY/...
* Models have trended upward with precip/snowfall tonight into
  Monday.
* Issuing Winter Storm Watches for RI and SE MA and Winter
  Weather Advisories for N CT and Mass Pike corridor into Boston
  and coastal NE MA.

We are becoming more confident that accumulating snow will
affect SNE later tonight into Monday, especially along and south
of Mass Pike where we expect to see highest totals. However,
there are still some conflicting signals in model guidance as to
how much snow will fall.

Overall pattern is not one that favors widespread 6"+ snowfall
totals. Closed mid level low is expected to weaken as it runs
into confluent flow aloft across Northeast, but trend has
continued to bring everything a little farther north. Snow
growth is not ideal as best lift is centered in colder air
around -20C but combination of good overruning and some ocean
enhancement on N/NE flow near coast should compensate and help
generate widespread 2-4" snowfall across SNE, especially along
and south of Mass Pike.

That said, we do have some concern for higher snowfall in RI and
SE MA, especially along Route 44 corridor from Providence to
Taunton and Plymouth, where we could see as 6 or 7" in some
locations. Models have trended upward in QPF including ECMWF,
UKMET, NAM (ARW/NMM), and even HREF (out to 36 hours). EC
ensemble has decent probability of 0.50" QPF in SE MA as well.

As a result we are issuing a Winter Storm Watch for RI and SE
MA (including Cape Cod) which is where we have 50% confidence in
exceeding 6" of snow in a few locations. Typically we would go
right to Winter Weather Advisories but with potential for higher
snowfall totals and lingering uncertainty we would like to
allow next shift to get a look at 12Z runs to see if trends
persist, especially since snow does not begin until late
tonight. Keep in mind it's certainly possible that the Watch
gets converted to Advisories later today.

Farther north, we are issuing Winter Weather Advisories for
northern CT and along the Mass Pike corridor (including Boston)
to coastal NE MA, where we have most confidence in 2-4" of snow.
It's still uncertain farther north since there may be a tight
gradient between snow/no-snow so we will let next shift consider
expansion of advisories later today.

As for timing, snow arrives in CT valley 9-11 PM and reaches
eastern MA 11 PM-1 AM. Most of snow will accumulate overnight
which is when we have best overrunning and deep moisture through
column, and even period of decent snow growth in RI and SE MA.
Low passes SE of Nantucket Mon morning and takes most of lift
with it, and with drying at mid levels we should see lighter
snows most of day, especially in eastern MA where N/NE flow will
continue to bring some enhancement. Everything winds down during
afternoon from W to E.

&&

.LONG TERM /MONDAY NIGHT THROUGH SATURDAY/...
* Dry but turning colder Monday night into Wednesday
* Another chance of snow Wednesday ngt but likely changing to a
  wintry mix inland and rain along the coast Thursday
* Dry weather follows Friday and likely lingers into Saturday

Overview...

Large scale flow across the CONUS this period features a high
amplitude western trough and a downstream southeast/subtropical
ridge along with confluent flow across New England as northern
stream remains somewhat amplified. Forecast dilemma this period
revolves around amplitude of northern stream which will dictate
position of confluent flow across New England/Maritimes and
accompanying dry/cold airmass. This will ultimately determine the
storm track and ptype for Wed night/Thu event.

Details...

Mon night/Tue/Wed ...

Drying trend develops Mon night as coastal low ejects out to sea in
response to northern stream short wave moving across New England.
Good cold air advection (CAA) behind this departing short wave with
925 mb temps dropping to -10C to -12C across southern New England
Mon ngt into Wed. This will support temps colder than normal with
highs only in the upper 20s to lower 30s both Tue and Wed and teens
at night. Blustery NW winds Mon ngt and Tue will provide cold wind
chills as well. Winds diminish Wed as 1030+ mb high pres builds over
the region.

Wed night/Thursday ...

Next surge of moisture approaches from the southwest Wed ngt. Column
is initially cold enough to support all snow. However with southeast
east ridge building up the eastern seaboard storm track shifts
farther north closer to New England. Also with mid level trough
tracking well northwest of New England mid level warm air
overspreads the area Thu. However with northern stream short wave
slow to exit Newfoundland, cold high pres will linger over the
maritimes and provide cold air damming across interior southern New
England for at least at time into early Thu. This will increase the
odds of shallow cold air lingering across the interior and
supporting a wintry mix. Closer to the coast snow likely changes to
rain given a storm track along or near the south coast. Although
given event is still 96+ hrs out in time we don't want to lock into
only one weather scenario.

Friday/Saturday ...

Coastal low and associated mid level trough from Thu moves east of
New England and is replaced by dry NW flow aloft and seasonable
temps Fri into Sat. Next system approaches Sat night/Sunday with
the threat for another round of wintry precip.

&&

.AVIATION /14Z SUNDAY THROUGH THURSDAY/...
Forecaster Confidence Levels...

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

Short Term /through Monday/...High confidence.

VFR through early tonight other than the potential for brief
periods of marginal MVFR cigs flirting with outer-Cape/ACK.
N/NW winds become light E/SE this afternoon. Light snow begins
near BAF/BDL around 04Z, reaches BOS/PVD around 06Z, and HYA/ACK
by 08Z. Conditions quickly lower to MVFR at onset and to
IFR/LIFR within two hours after that. Snow, or a mix of snow and
sleet near South Coast, continues through daybreak with
IFR/LIFR conditions before improvement 12Z-18Z from west to
east, possibly a little later on Cape Cod.

Accumulations of 2-4 inches are expected across most of southern
New England, most of which will fall prior to 12Z Monday.

KBOS Terminal...High confidence in TAF.

KBDL Terminal...High confidence in TAF.

Outlook /Monday Night through Thursday/...

Monday Night: Mainly VFR, with local IFR possible. Breezy.
Slight chance SN.

Tuesday through Tuesday Night: VFR. Breezy.

Wednesday: Mainly VFR, with local IFR possible. Chance SN.

Wednesday Night: Mainly IFR, with areas MVFR possible. Breezy.
SN likely, PL likely, FZRA likely.

Thursday: Mainly VFR, with areas MVFR possible. Breezy. Chance
RA, chance FZRA, chance PL.

&&

.MARINE...
Forecaster Confidence Levels...

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

Short Term /through Monday/...High confidence.

High pressure builds over region today with diminishing winds
and seas.

Low pressure will track SE of Nantucket Mon morning but is not
expected to strengthen very much, so NE winds should remain
below 25 kt. Seas will build on outer southern waters so we
issued SCA for tonight into Monday. Snow tonight will change to
sleet and rain on waters south of Islands, but should remain as
snow into Monday on remainder of waters with low visibility at
times.

Outlook /Monday Night through Thursday/...

Monday Night: Winds less than 25 kt. Seas up to 5 ft. Chance of
snow. Areas of visibility 1 to 3 nm.

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

Wednesday: Winds less than 25 kt. Seas locally approaching
5 ft. Slight chance of snow. Areas of visibility 1 to 3 nm.

Wednesday Night: Winds less than 25 kt. Seas locally
approaching 5 ft. Rain likely, chance of snow, sleet likely,
freezing rain likely. Visibility 1 to 3 nm.

Thursday: Winds less than 25 kt. Areas of seas approaching
5 ft. Chance of rain, freezing rain likely.

&&

.TIDES/COASTAL FLOODING...
High astronomical tides next week with several 12 ft tides in Boston
Wed and Thu! Thus won't take much onshore flow to produce minor
coastal flooding along the eastern MA coastline. Greatest risk comes
late Wed into Thu as surface wave tracks along or near south coast
combining with Maritime high pressure to provide increasing onshore
flow.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...Winter Weather Advisory from 10 PM this evening to 1 PM EST
     Monday for CTZ002>004.
MA...Winter Storm Watch from late tonight through Monday afternoon
     for MAZ017>022.
     Winter Weather Advisory from midnight tonight to 1 PM EST
     Monday for MAZ007-013>016.
     Winter Weather Advisory from 10 PM this evening to 1 PM EST
     Monday for MAZ009-011-012.
RI...Winter Storm Watch from late tonight through Monday afternoon
     for RIZ001>007.
MARINE...Small Craft Advisory from 3 AM to 6 PM EST Monday for
     ANZ254>256.

&&

SYNOPSIS...Nocera/JWD
NEAR TERM...Frank
SHORT TERM...JWD
LONG TERM...Nocera
AVIATION...Frank/Nocera/JWD
MARINE...Nocera/JWD
TIDES/COASTAL FLOODING...Staff

Hazardous Weather Outlook
National Weather Service Boston/Norton MA
403 AM EST Sun Feb 17 2019

MAZ002>006-008-010-026-180915-
Western Franklin MA-Eastern Franklin MA-Northern Worcester MA-
Central Middlesex MA-Western Essex MA-Western Hampshire MA-
Eastern Hampshire MA-Northern Middlesex MA-
403 AM EST Sun Feb 17 2019

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

.DAY ONE...Today and tonight.

Hazardous weather is not expected at this time.

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

Late tonight into Monday...

Accumulating snow is expected late tonight into Monday. Current
expectations are for 2 to 4 inches of snow. However, if the low
pressure system tracks further south accumulations would be limited
to an inch or two. On the other end of the spectrum, a track further
north would result in a swath of 3 to 7 inches of snow.

The greatest risk for impacts for those commuting Monday morning
willbe south of the Massachusetts turnpike. The focus for
accumulating snow will shift towards central and eastern
Massachusetts Monday afternoon before ending by early evening.

Late Wednesday Into Thursday...

The potential exists for a wintry mix of snow, sleet and freezing
rain sometime late Wednesday into Thursday morning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

CTZ002>004-MAZ009-011-012-180915-
Hartford CT-Tolland CT-Windham CT-Western Hampden MA-
Eastern Hampden MA-Southern Worcester MA-
403 AM EST Sun Feb 17 2019

...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 1 PM
EST MONDAY...

This Hazardous Weather Outlook is for northern Connecticut, central
Massachusetts and western Massachusetts.

.DAY ONE...Today and tonight.

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

   Winter Weather Advisory.

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

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

   Winter Weather Advisory.

Late Wednesday Into Thursday...

The potential exists for a wintry mix of snow, sleet and freezing
rain sometime late Wednesday into Thursday morning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

MAZ017-018-021-RIZ001>005-180915-
Northern Bristol MA-Western Plymouth MA-Southern Plymouth MA-
Northwest Providence RI-Southeast Providence RI-Western Kent RI-
Eastern Kent RI-Bristol RI-
403 AM EST Sun Feb 17 2019

...WINTER STORM WATCH IN EFFECT FROM LATE TONIGHT THROUGH MONDAY
AFTERNOON...

This Hazardous Weather Outlook is for southeastern Massachusetts
and northern Rhode Island.

.DAY ONE...Today and tonight.

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

   Winter Storm Watch.

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

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

   Winter Storm Watch.

Late Wednesday Into Thursday...

The potential exists for a wintry mix of snow, sleet and freezing
rain sometime late Wednesday into Thursday morning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

MAZ013-014-180915-
Western Norfolk MA-Southeast Middlesex MA-
403 AM EST Sun Feb 17 2019

...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM
EST MONDAY...

This Hazardous Weather Outlook is for eastern Massachusetts.

.DAY ONE...Today and tonight.

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

   Winter Weather Advisory.

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

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

   Winter Weather Advisory.

Late Wednesday Into Thursday...

The potential exists for a wintry mix of snow, sleet and freezing
rain sometime late Wednesday into Thursday morning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

MAZ007-015-016-180915-
Eastern Essex MA-Suffolk MA-Eastern Norfolk MA-
403 AM EST Sun Feb 17 2019

...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 1 PM
EST MONDAY...

This Hazardous Weather Outlook is for eastern Massachusetts and
northeastern Massachusetts.

.DAY ONE...Today and tonight.

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

   Winter Weather Advisory.

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

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

   Winter Weather Advisory.

Late Wednesday Into Thursday...

The potential exists for a wintry mix of snow, sleet and freezing
rain sometime late Wednesday into Thursday morning.

High Astronomical Tides...

Astronomical tides will be running high next week and may result in
minor coastal flooding. The greatest concern is around Thursday when
a weak area of low pressure may increase the threat given onshore
winds.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

MAZ019-020-022-RIZ006-007-180915-
Eastern Plymouth MA-Southern Bristol MA-Barnstable MA-Washington RI-
Newport RI-
403 AM EST Sun Feb 17 2019

...WINTER STORM WATCH IN EFFECT FROM LATE TONIGHT THROUGH MONDAY
AFTERNOON...

This Hazardous Weather Outlook is for southeastern Massachusetts
and southern Rhode Island.

.DAY ONE...Today and tonight.

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

   Winter Storm Watch.

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

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

   Winter Storm Watch.

Late Wednesday Into Thursday...

The potential exists for a wintry mix of snow, sleet and freezing
rain sometime late Wednesday into Thursday morning.

High Astronomical Tides...

Astronomical tides will be running high next week and may result in
minor coastal flooding. The greatest concern is around Thursday when
a weak area of low pressure may increase the threat given onshore
winds.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed.

MAZ023-024-RIZ008-180915-
Dukes MA-Nantucket MA-Block Island RI-
403 AM EST Sun Feb 17 2019

This Hazardous Weather Outlook is for southeastern Massachusetts
and southern Rhode Island.

.DAY ONE...Today and tonight.

Hazardous weather is not expected at this time.

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

Late tonight into Monday...

Accumulating snow is expected late Sunday night into Monday. Current
expectations are for 2 to 4 inches of snow. However, if the low
pressure system tracks further south accumulations would be limited
to an inch or two. On the other end of the spectrum, a track further
north would result in a swath of 3 to 7 inches of snow.

The greatest risk for impacts for those commuting Monday morning
will be south of the Massachusetts turnpike. The focus for
accumulating snow will shift towards central and eastern
Massachusetts Monday afternoon before ending by early evening.

Late Wednesday Into Thursday...

The potential exists for a wintry mix of snow, sleet and freezing
rain sometime late Wednesday into Thursday morning.

High Astronomical Tides...

Astronomical tides will be running high next week and may result in
minor coastal flooding. The greatest concern is around Thursday when
a weak area of low pressure may increase the threat given onshore
winds.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

ANZ230>237-250-251-254>256-180915-
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-
403 AM EST Sun Feb 17 2019

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

.DAY ONE...Today and tonight.

Hazardous weather is not expected at this time.

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

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