Special Weather Statement, NWS Boston/Norton, MA

Area Forecast Discussion
National Weather Service Taunton MA
1005 PM EST Fri Mar 3 2017

.SYNOPSIS...
An arctic cold front will cross the region this evening which will
be accompanied by scattered snow showers along with a few heavier
but localized snow squalls. Behind the arctic front near record cold
and bitterly cold wind chills tonight into Sunday morning.
A significant warming trend follows early next week with
temperatures likely back into the 50s Tuesday and Wednesday,
along with a chance of showers. Colder weather returns late in
the week with a few snow showers possible Thursday night into
early Friday.

&&

.NEAR TERM /UNTIL 6 AM SATURDAY MORNING/...
***Localized brief heavy snow squalls continue this evening***

10pm update...
Noting the gradual development of a modest narrow inverted trof.
This is especially noticeable in local meso-obs/winds suggest
some decent convergence colocated with a narrow min in MSAS
pres. This continues to provide enough of a focus for continued
SHSN which as the trof pulls both E and S will move across
portions of E MA and RI through about 1AM. SN accums should
remain light, generally under an inch but quick accums on area
roadways cannot be ruled out as these move through.

Otherwise, forecast on track. POPs/WX are close to both
operational HRRR and experimental HRRR which are now carrying
this inverted trof well.

Previous discussion...

After analyzing all of the 12z guidance including the 12z
GFS/NAM/NAM nest/NAM nest parallel/19z HRRR & HRRRX/12zARW/NMMB/BTV-
WRF and latest RAP, good model consensus on two bands of snow
showers/squalls impacting southern New England this evening and
overnight. Hi Res models simulating very well two lines of snow
squalls currently over eastern PA and NY state. In fact noting VCTS
with these squalls earlier at ELM NY. This activity enters western
MA/CT including the Greater Hartford/Springfield area between 5 pm
and 7 pm, then eastward into RI and eastern MA including Boston 7 pm
to 9 pm and shortly thereafter across Cape Cod. Some of the guid
weakens this initial band of snow showers/squalls as it traverses
eastward especially into RI and eastern MA.

As the lead arctic short wave approaches from the west it induces a
surface wave on the arctic front over southeast NH 22z-02z with an
inverted trough extending westward into southern VT. As this
boundary and associated low level convergence slips south a new line
of squalls will likely move into northern and eastern MA including
Boston between 10 pm to 1 am. Pretty impressive how well these Hi
Res models are simulating the squalls over eastern PA and NY then
model consensus over southern New England this evening. Thus we have
above average confidence on the timing and areal coverage
(scattered) of snow showers/squalls across the entire region this
evening.

As is the case with warm season convection some towns will be
impacted while neighboring communities will be spared. While a
lot of snow is not expected, some of the more intense squalls
will result in the potential for a quick 0.5 to 1.0 inch in 15-20
mins, covering roads quickly with a light accumulation and vsby
briefly but rapidly lowering to a 1/4 mile or less. Seeing many
social media posts upstream across PA/NY of many accidents as roads
quickly become slick along with poor vsby. In addition gusty WNW
winds will accompany the squalls. Will continue to communicate these
details via our Special Weather Statement.

Then behind this arctic front very strong CAA overspreads the area
with 850 temps lowering to about -22C by 12z Sat. This will result
in temps plummeting into the teens with single digits well inland.
These frigid temps combined with gusty NW winds up to 35 mph will
result in bitterly cold wind chills from minus 5 to 5 above zero.
Across the higher terrain of the Worcester Hills to the east slopes
of the Berkshires -5 to -15 wind chills will be common.

Given the magnitude of the cold air tonight's temps were derived
from the coldest guid sources.

&&

.SHORT TERM /6 AM SATURDAY MORNING THROUGH SATURDAY NIGHT/...
Saturday...

Second surge of arctic air comes tomorrow from trailing arctic short
wave in the afternoon. Good forcing for ascent with this feature
however models are indicating a lack of low and mid level moisture
for short wave to work with. Thus models are not generating much qpf
given the lack of moisture despite steep lapse rates and strong
forcing. Will have to watch how this evolves as sometimes these
potential short waves finds a way to pool enough moisture for
scattered snow showers/squalls to materialize. For now will keep the
forecast dry but later shifts will need to reevaluate.

Behind this short wave a second surge of arctic air advects across
the region with 850 temps lowering to -22C along the south coast to -
24C along the NH/MA border. Will be interesting to see how cold the
850 temp is on the 00z observed CHH sounding Sat evening, as the
coldest 850 temp observed in the month of March is -23C (per SPC
sounding climo)! Puts into context how cold of an airmass we are
dealing with.

Sat night...

Coldest temps will be observed tomorrow night as the core of the
cold air settles over the region. Mins will range from near zero
northwest MA to the teens along the south coast with single digits
across most of the area. Mins were derived from the coldest data
sets. Given robust CAA continues especially during the evening gusty
NNW winds will yield wind chills from zero to about minus 10 with
minus 15 to minus 20 across the high terrain. Will highlight these
bitterly cold wind chills via our Special Weather Statement but may
eventually need a wind chill advisory.

Dry weather prevails but could see some ocean effect snow showers
esp in the evening across the outer Cape as winds back to about 330
degs.

&&

.LONG TERM /SUNDAY THROUGH FRIDAY/...
Highlights...

* Significantly milder Tue/Wed with some showers.
* Turning colder Thu night with a few snow showers possible

Details...

Sunday...

Wind chills may still be near Advisory criteria of -15 degrees in
far northwest MA early Sunday morning with 0 to -10 degrees
across all of the rest of MA, except the southeast. However, the
core of the cold air mass will be shifting offshore, which will
allow some relief from the bitter cold. High pressure overhead
coupled with the increasing March sun angle should allow highs
to recover into the 30 to 35 degree range. Those temps are still
nearly 10 degrees below normal for early March. Northwest winds
will be gusty in the east, but will be diminishing during the
day.

Sunday night and Monday...

High pressure crests over the region Sunday night...so despite
rising height fields expect a good night of radiational
cooling. Low temps should bottom out well down into the teens
across many locations. with even a few single digits expected in
northwest MA and some of the normally colder areas in southeast
MA.

A return southerly flow of air should occur Monday as high pressure
moves off the coast. This should allow high temps to recover to
the mid and upper 40s Monday afternoon in many locations. The
exception might be along the immediate coast, where sea breezes
may result in high temps struggling to break 40. Skies will
start out sunny but there will be an increase in high cloudiness
from west to east during the afternoon.

Monday night through Tuesday night...

Strong low pressure in western Ontario will be slowly heading toward
Hudson Bay as high pressure shifts farther east off the coast.
The result will be a southerly flow of much milder air into
southern New England. Best forcing will be located well to our
northwest, but warm advection should create a chance of light
showers Monday night, which could possibly start as some snow or
freezing rain near the VT/NH border.

Skies will be mostly cloudy and there is a chance of showers Tuesday,
but temperatures will climb to the lower and middle 50s. Expecting
a weak cold front to move across the region Tuesday night,
enhancing the chances of showers.

Wednesday...

There is a slight chance of an early morning shower. Then, with
increasing sunshine and westerly downsloping winds, temperatures
are forecast to climb to 55 to 60.

Thursday...

A secondary cold front is forecast to move through on Thursday.
Timing is slightly different amongst models. Highs mainly in
the 40s. By Thursday night, a brisk and somewhat unstable flow
of air will usher much colder air into the region. There is a
chance of a few snow showers. Preferred the cooler guidance, in
deference to the much colder ECMWF solution. Lows Thursday night
mainly in the 20s, except teens northwest MA and near 30 outer
Cape Cod and Islands.

Friday...

Weak high pressure will lead to a partly sunny day with highs
in the lower to mid 40s. Attention will then turn to an
approaching warm front. There is a big discrepancy in the models
for next weekend's weather, which is highly dependent on the
timing and location of this warm front. But that is currently
beyond our forecast period.

&&

.AVIATION /03Z SATURDAY THROUGH WEDNESDAY/...
Forecaster Confidence Levels...

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

Short Term /through Saturday Night/...

VFR but MVFR/IFR at times in scattered snow squalls. These
could include quick light SN accumulations on runways and brief
increases in wind gusts 30-35 kt out of the NW. Squalls exiting
RI and eastern MA by 02-03Z. Could see some lingering scattered
snow showers in northern MA till 05Z.

Sat...moderate confidence.

Mainly VFR conditions but low probability of additional snow
showers/squalls in MVFR-IFR during the morning hours. Winds
increase early Sat, 25-35 kt again.

Sat night...high confidence.

VFR but MVFR-IFR possible across the outer Cape as ocean effect
clouds and snow showers may move into that region. Gusty NNW
winds 20-30 kt.

KBOS TAF...Moderate to High confidence in TAF. Brief MVFR-IFR in snow
shower/snow squalls likely between 00z and 02z then a second
round 03z-06z.

KBDL TAF...Moderate to High confidence in TAF. Brief MVFR-IFR in snow
showers/snow squalls between 22z and 00z.

Outlook /Sunday through Wednesday/...

Sunday...High confidence. VFR other than the risk for brief
MVFR conditions across Outer Cape Cod for an hour or two Sunday
morning. Northwest wind gusts of 20 to 25 knots will diminish
during the day.

Sunday night and Monday...High confidence. VFR.

Monday night into early Wednesday...Moderate confidence.
VFR but areas of MVFR-IFR conditions in lower clouds and
scattered showers from time to time. Greatest risk for IFR and
heavier showers is Tuesday night.

Mid-morning through Wednesday afternoon... High confidence.
Becoming VFR through the region. Gusty west winds to 15-25 kts.

&&

.MARINE...
Forecaster Confidence Levels...

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

*** NNW Gales, Moderate Freezing Spray & possible Arctic Sea
    Smoke ***

4 pm update...

Short Term /through Saturday Night/...

Tonight...High confidence.

First surge of gales overspread the waters roughly 8 pm to 2 am from
northwest to southeast behind first arctic front. The front will
likely be accompanied by brief but intense snow squalls lowering
vsby to 1/4 mile or less at times. Improvement 2nd half of the
night. However arctic air will result in areas of moderate freezing
spray across the eastern MA waters.

Saturday...high confidence.

Second arctic front crosses the region during the afternoon with
another surge of NNW gales. Moderate freezing spray eastern MA
waters along with possible snow squalls esp offshore.

Sat night...high confidence.

NNW gales continue with core of arctic air over the MA/RI waters.
Widespread moderate freezing including the RI waters. Thus freezing
spray advisories have been expanded. Low risk for a few hours of
heavy freezing spray eastern MA waters. Given how cold and dry this
airmass will be could see shallow arctic sea smoke develop.

Outlook /Sunday through Wednesday/...

Sunday...High confidence.  Freezing spray concerns should come to an
end by Sunday afternoon as the air mass modifies. Wind gusts
will also gradually diminish as high pressure slowly builds in
from the west...but still expecting small craft advisory
criteria wind gusts until mid-afternoon.

Monday and Monday night...High confidence. Winds and seas
should below small craft thresholds.

Tuesday...Marginal southerly small craft wind gusts...to near
25 kts...may develop by Tue afternoon as high pressure
continues to move east allowing for southerly gradient to
increase. 5 to 6 foot seas may develop across our southern
waters. Scattered showers.

Tuesday night and Wednesday...5 to 7 ft seas over the southern
and far eastern outer waters. West to west-southwest winds will
gust to 20-25 kt at times. Scattered showers Tuesday night and
early Wednesday morning could reduce visibilities to 3 miles or
less.

&&

.CLIMATE...
Record Low Max Temperatures for Sat March 4...

BOS...21/1896
PVD...23/1943
BDL...23/1943
ORH...19/1943

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...Freezing Spray Advisory from 4 PM Saturday to 7 AM EST Sunday
     for ANZ232>234-255.
     Gale Warning from 7 AM Saturday to 1 AM EST Sunday for
     ANZ232>234.
     Small Craft Advisory until 7 PM EST Saturday for ANZ230-236.
     Freezing Spray Advisory from 4 AM Saturday to 7 AM EST Sunday
     for ANZ231-250-251-254.
     Gale Warning from 4 AM Saturday to 1 AM EST Sunday for ANZ231-
     251.
     Freezing Spray Advisory from 9 PM Saturday to 7 AM EST Sunday
     for ANZ235-237-256.
     Gale Warning from 7 AM to 4 PM EST Saturday for ANZ235-237.
     Gale Warning from 1 AM Saturday to 7 AM EST Sunday for ANZ250-
     254.
     Gale Warning from 4 AM to 4 PM EST Saturday for ANZ255-256.

&&

SYNOPSIS...Nocera/GAF
NEAR TERM...Nocera/Doody
SHORT TERM...Nocera
LONG TERM...GAF
AVIATION...Nocera/GAF
MARINE...Nocera/GAF
CLIMATE...

Hazardous Weather Outlook
National Weather Service Taunton MA
441 PM EST Fri Mar 3 2017

CTZ002>004-MAZ002>024-026-RIZ001>008-042145-
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-
441 PM EST Fri Mar 3 2017

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

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

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

There is a high risk that Wind Chill Advisories Will be needed
Saturday night into early Sunday morning for the Worcester Hills and
east slopes of the Berkshires. This would be for wind chills around
15 below zero.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ256-042145-
Coastal Waters from Montauk NY to Marthas Vineyard extending out to
20 nm South of Block Island-
441 PM EST Fri Mar 3 2017

...GALE WARNING IN EFFECT FROM 4 AM TO 4 PM EST SATURDAY...
...FREEZING SPRAY ADVISORY IN EFFECT FROM 9 PM SATURDAY TO 7 AM EST
SUNDAY...

This Hazardous Weather Outlook is for Rhode Island coastal waters.

.DAY ONE...Tonight.

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

   Gale Warning.

.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.

   Gale Warning.
   Freezing Spray Advisory.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ255-042145-
Coastal Waters extending out to 25 nm South of Marthas Vineyard and
Nantucket-
441 PM EST Fri Mar 3 2017

...GALE WARNING IN EFFECT FROM 4 AM TO 4 PM EST SATURDAY...
...FREEZING SPRAY ADVISORY IN EFFECT FROM 4 PM SATURDAY TO 7 AM EST
SUNDAY...

This Hazardous Weather Outlook is for Massachusetts coastal waters.

.DAY ONE...Tonight.

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

   Gale Warning.

.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.

   Gale Warning.
   Freezing Spray Advisory.

There is a low to moderate risk that a few hours of heavy freezing
spray may occur very early Saturday morning and then again Saturday
night. Therefore...it is possible the Freezing Spray Advisory may
need to be upgraded to a Heavy Freezing Spray Warning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ250-254-042145-
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-
441 PM EST Fri Mar 3 2017

...GALE WARNING IN EFFECT FROM 1 AM SATURDAY TO 7 AM EST SUNDAY...
...FREEZING SPRAY ADVISORY IN EFFECT FROM 4 AM SATURDAY TO 7 AM EST
SUNDAY...

This Hazardous Weather Outlook is for Massachusetts coastal waters.

.DAY ONE...Tonight.

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

   Gale Warning.
   Freezing Spray Advisory.

.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.

   Gale Warning.
   Freezing Spray Advisory.

There is a low to moderate risk that a few hours of heavy freezing
spray may occur very early Saturday morning and then again Saturday
night. Therefore...it is possible the Freezing Spray Advisory may
need to be upgraded to a Heavy Freezing Spray Warning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ231-251-042145-
Cape Cod Bay-Massachusetts Bay and Ipswich Bay-
441 PM EST Fri Mar 3 2017

...GALE WARNING IN EFFECT FROM 4 AM SATURDAY TO 1 AM EST SUNDAY...
...FREEZING SPRAY ADVISORY IN EFFECT FROM 4 AM SATURDAY TO 7 AM EST
SUNDAY...

This Hazardous Weather Outlook is for Massachusetts coastal waters.

.DAY ONE...Tonight.

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

   Freezing Spray Advisory.
   Gale Warning.

.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.

   Freezing Spray Advisory.
   Gale Warning.

There is a low to moderate risk that a few hours of heavy freezing
spray may occur very early Saturday morning and then again Saturday
night. Therefore...it is possible the Freezing Spray Advisory may
need to be upgraded to a Heavy Freezing Spray Warning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ235-237-042145-
Rhode Island Sound-Block Island Sound-
441 PM EST Fri Mar 3 2017

...GALE WARNING IN EFFECT FROM 7 AM TO 4 PM EST SATURDAY...
...FREEZING SPRAY ADVISORY IN EFFECT FROM 9 PM SATURDAY TO 7 AM EST
SUNDAY...

This Hazardous Weather Outlook is for Rhode Island coastal waters.

.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.

   Gale Warning.
   Freezing Spray Advisory.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ230-236-042145-
Boston Harbor-Narragansett Bay-
441 PM EST Fri Mar 3 2017

This Hazardous Weather Outlook is for Massachusetts coastal waters
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.

ANZ232>234-042145-
Nantucket Sound-Vineyard Sound-Buzzards Bay-
441 PM EST Fri Mar 3 2017

...GALE WARNING IN EFFECT FROM 7 AM SATURDAY TO 1 AM EST SUNDAY...
...FREEZING SPRAY ADVISORY IN EFFECT FROM 4 PM SATURDAY TO 7 AM EST
SUNDAY...

This Hazardous Weather Outlook is for Massachusetts coastal waters.

.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.

   Gale Warning.
   Freezing Spray Advisory.

There is a low to moderate risk that a few hours of heavy freezing
spray may occur very early Saturday morning and then again Saturday
night. Therefore...it is possible the Freezing Spray Advisory may
need to be upgraded to a Heavy Freezing Spray Warning.

.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

Special Weather Statement
National Weather Service Taunton MA
423 PM EST Fri Mar 3 2017

CTZ002>004-MAZ002>024-026-RIZ001>008-040330-
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-
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, Brockton, Plymouth, Fall River, New Bedford,
Mattapoisett, Chatham, Falmouth, Provincetown, Vineyard Haven,
Nantucket, Ayer, Foster, Smithfield, Providence, Coventry,
West Greenwich, East Greenwich, Warwick, West Warwick, Bristol,
Narragansett, Westerly, Newport, and New Shoreham
423 PM EST Fri Mar 3 2017

...Scattered Snow Squalls With Brief Heavy Snow, Poor Visibility,
Slippery Roads and Gusty Northwest Winds This Evening...

An arctic cold front will cross the region this evening and will
be accompanied be scattered snow squalls, with quick
accumulations on area roads and rapid visibility reductions at
times. These snow squalls will first overspread western
Massachusetts and Connecticut between 5 pm and 7 pm, this includes
the Greater Hartford and Springfield area, then into Rhode Island
and eastern Massachusetts including the Greater Boston area
between 7 pm and 9 pm.

Note that, like summertime thunderstorms, these squalls will be
hit-or-miss with some locations seeing little to no impact. Latest
forecast guidance suggest that there could be a second round of
snow squalls, exiting southern New Hampshire and into northern
Massachusetts between 9 pm and midnight. These narrow but brief
intense snow bands are extremely difficult to pinpoint exact
timing and location. Nonetheless evening commuters need to be
prepared for rapid but brief changes in visibility and potentially
snow covered roads for a time.

In addition, behind this arctic front frigid temperatures will
overspread the area late tonight and continue into Sunday morning
with bitterly cold late night/early morning wind chills below
zero!

Nocera

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
550 PM EST FRI MAR 3 2017

CTZ002-MAZ002>004-008>011-032345-
Hartford-Western Franklin-Western Hampshire-Western Hampden-Eastern
Hampden-Northern Worcester-Eastern Franklin-Eastern Hampshire-
550 PM EST FRI MAR 3 2017

...HEAVY SNOW SQUALLS WILL AFFECT SOUTHERN FRANKLIN...
HAMPSHIRE...HAMPDEN...HARTFORD AND WESTERN WORCESTER COUNTIES...

At 544 PM EST...dangerous snow squalls were along a line extending
from near Plainfield to Great Barrington...moving east at 35 mph.

Visibilities may rapidly drop to one-half to one-quarter mile and
winds may gust up to 40 mph as these squalls move through. They will
only last for 15 to 20 minutes in a given location, but a half-inch
of snow accumulation is also expected.  This will make for very
dangerous driving conditions.

Locations impacted include...
Springfield, Chicopee, Westfield, Holyoke, Amherst, Northampton,
Agawam, West Springfield, Orange, Deerfield, Simsbury, Ludlow,
Gardner, Avon, South Hadley, Easthampton, Longmeadow, Suffield,
Belchertown and Wilbraham.

Drivers need to remain alert. These conditions often lead to
accidents, especially on highways, since road conditions can change
rapidly. Avoid braking suddenly. Consider delaying travel until the
squalls pass.

&&

LAT...LON 4212 7306 4215 7307 4215 7303 4231 7300
      4233 7306 4238 7307 4238 7301 4248 7299
      4257 7287 4257 7193 4181 7287 4183 7294
      4188 7295 4190 7291 4197 7289 4197 7303
      4204 7301 4204 7306 4211 7307
TIME...MOT...LOC 2244Z 270DEG 29KT 4252 7288 4203 7350

FIELD

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
703 PM EST FRI MAR 3 2017

CTZ004-MAZ004-005-011>014-026-RIZ001-040100-
Windham-Northwest Middlesex County-Southern Worcester-Western
Norfolk-Central Middlesex County-Eastern Hampden-Northern
Worcester-Southeast Middlesex-Northwest Providence-
703 PM EST FRI MAR 3 2017

...A LINE OF SNOW SQUALLS WAS MOVING INTO EASTERN MASSACHUSETTS...

At 658 PM EST...a line of snow squalls extending from Shirley
southwestward through Worcester County to near Brimfield. The line
was moving to the east-southeast at 30 mph. It will be affecting the
Boston metro area between 715 pm and 8 pm.

Visibilities will be reduced to one-half to one mile for about a 5
to 10 minute period. Winds will gust to 30 to 40 mph with these
squalls and there will likely be a coating to one-half inch of
accumulation.

Locations impacted include...
Worcester, Newton, Framingham, Waltham, Medford, Arlington,
Leominster, Marlborough, Woburn, Shrewsbury, Natick, Watertown,
Franklin, Lexington, Needham, Milford, Wellesley, Belmont, Burlington
and Westford.

Drivers need to remain alert. These conditions often lead to
accidents, especially on highways, since road conditions can change
rapidly. Avoid braking suddenly. Consider delaying travel until the
squalls pass.

&&

LAT...LON 4244 7113 4185 7170 4210 7223 4263 7163
TIME...MOT...LOC 2358Z 306DEG 24KT 4257 7168 4215 7216

FIELD

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
801 PM EST FRI MAR 3 2017

MAZ007-013-015>022-RIZ001>008-040200-
Eastern Essex-Suffolk-Southern Plymouth-Eastern Norfolk-Western
Plymouth-Barnstable-Eastern Plymouth-Northern Bristol-Southern
Bristol-Western Norfolk-Block Island-Eastern Kent-Newport-Northwest
Providence-Bristol-Washington-Western Kent-Southeast Providence-
801 PM EST FRI MAR 3 2017

...A snow squall WILL AFFECT southern Rhode Island and Southeast
Massachusetts
...

At 801 PM EST...A snow squall was along a line extending from near
Salisbury to near Dedham to near Foster to near East Haddam, and was
moving southeast at 30 mph.

Drivers need to remain alert. These conditions often lead to
accidents, especially on highways, since road conditions can change
rapidly. Avoid braking suddenly. Consider delaying travel until the
squalls pass.

&&

LAT...LON 4167 7179 4243 7098 4225 7088 4226 7088
      4282 7082 4199 7070 4208 7020 4205 7021
      4145 7136 4173 7122 4158 7133 4159 7133
      4163 7135 4166 7135 4163 7133 4172 7134
      4179 7137 4115 7161
TIME...MOT...LOC 0101Z 293DEG 28KT 4285 7088 4223 7115 4177 7169 4149
7238

md

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
1019 PM EST FRI MAR 3 2017

MAZ005-007-012>022-040515-
Southern Worcester-Eastern Essex-Suffolk-Southern Plymouth-Central
Middlesex County-Eastern Norfolk-Western
Plymouth-Barnstable-Southeast Middlesex-Eastern Plymouth-Northern
Bristol-Southern Bristol-Western Norfolk-
1019 PM EST FRI MAR 3 2017

...A snow squall WILL AFFECT eastern Massachusetts. ...

At 1018 PM EST...A snow squall was along a line extending from near
Lancaster to near Hudson to Saugus to 8 miles north of Provincetown,
and was moving southeast at 25 mph.

This second round of snow squalls could lead to quick accumulations
of up to an inch of snow.

Drivers need to remain alert. These conditions often lead to
accidents, especially on highways, since road conditions can change
rapidly. Avoid braking suddenly. Consider delaying travel until the
squalls pass.

&&

LAT...LON 4198 7014 4192 7055 4189 7001 4186 7053
      4179 7052 4170 7099 4206 7151 4240 7160
      4253 7110 4242 7091 4230 7105 4225 7088
      4234 7088 4220 7072 4220 7071 4195 7065
      4193 7052 4208 7017 4186 6995
TIME...MOT...LOC 0318Z 312DEG 23KT 4249 7173 4239 7150 4248 7103 4217
7024

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