Special Weather Statement, NWS Boston/Norton, MA

Area Forecast Discussion
National Weather Service Boston/Norton MA
256 PM EST Fri Nov 12 2021

.SYNOPSIS...
A strong frontal system will bring a period of heavy rain, gusty
winds and perhaps an isolated thunderstorm today. Much drier
and cooler temperatures return tonight. A potent low brings a
period of scattered showers and strong gusty winds late Sat into
Sat night. Another area of low pressure moves up the coast
Sunday night and Monday, bringing more showers and possibly some
snow in the west. Cooler air arrives, especially for Monday and
Tuesday, followed by warming Wednesday and Thursday. Another
cold front brings a few showers Thursday.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
1245 pm update..

forecast still in pretty good shape. Closely watching the fine
line now moving into our western areas. The tough part is trying
to determine how much wind the convection can bring down to the
surface. There is still a fairly decent low level inversion
across northern areas, but as you go further south, that
inversion is weaker. So it's a conditional risk for strong
winds. Also seen a little bit of weak rotation from time to
time, but so far that has stayed quite elevated. Radar still
showing strong (50kt+) winds at 2000ft and higher, but with the
inversion holding tough, we aren't seeing those at the surface.
Could be a narrow window right ahead of the fine line as
mesoanalysis via SPC suggests a small bit of instability is in
place. Along those lines, I did pull back on the chance for
thunder, and have it primarily across the southern third of the
forecast area. That might still be generous.

1045 am update...

overall, forecast is matching with reality fairly well. Only
made small tweaks based on latest surface and radar
observations.

VWP from KBOX and TBOS are showing 55-60kt currently in the
925mb to 850mb layer (roughly 3000-5000ft). Luckily a very
strong low level inversion down around 950mb (1500ft) is in
place per latest AMDAR aircraft soundings and this is keeping
much of that strong wind from getting to the surface. However,
will have to closely monitor the evolution of that inversion as
some guidance suggests it will weaken over the next few hours,
and those aircraft soundings show a weaker inversion closer to
NYC. Still, have seen some 45-50 mph gusts at mesonet sites
right along the coast. Further inland the wind has been less
(max gust 25 mph so far at our office). Latest hi-res models
suggest that fine line off to our west will be weakening as it
reaches our area. Will have to closely monitor that as well,
since the models might be a little fast in making that happen.
On a related note, the potential for thunder seems to getting
smaller. That said, left in the mention of slight chance,
mainly in southern areas which has the best chance to have some
very small instability that exists well to our south sneak in.

Will have to monitor rainfall as well. Fairly juicy atmosphere
for this time of the year, but so far individual showers are
racing along at 50kt+ so the ability to drop a lot of rain is
minimized.

645 AM Update...

Forecast still looks on track. Have only brought things in line
with the latest observations in the latest update.

Previous discussion...

Highlights...

* 2-4 Hour Period of Heavy Rain, gusty winds & a few embedded
  t-storms today roughly between 10 am and 6 pm.

* Heavy rain may result in typical nuisance poor drainage street
  flooding. Also, a low risk for a severe t-storm or two exists.

Details...

A potent closed low will move eastward across the Western Great
Lakes today. This process was already helping to induce a modest
southerly LLJ across our region early this morning. As a result,
a few showers were beginning to develop across western MA and
northern CT very early this morning. The forcing for ascent will
continue to increase from west to east in response to the low
level jet. We expect to see scattered showers develop and push
eastward through mid morning. However, this activity will be hit
or miss as the strong forcing will still be to our west.

The main event will be roughly a 2-4 hour period of heavy rain,
gusty winds and a few thunderstorms that will overspread the
region from west to east...roughly between 10 am and 6 pm. We
will discuss this in more depth below.

Heavy Rain/Street Flooding...

The core of the 60 to 70 knot low level jet will move across
the region from west to east late this morning and through the
afternoon. This will result in strong forcing for ascent and
combined with Pwats between 1.25 and 1.50 inches. These two
ingredients are both about 2-3 standard deviations above normal,
which is a recipe for heavy rainfall along with a few embedded
t-storms. The main event should work into western MA and CT
after 10 or 11 am; reaching eastern MA/RI after 1 or 2 pm.
Fortunately, this system is progressive so the heavy rainfall
should last approximately 2-4 hours; so expect this activity to
exit the southeast New England coast by 6 pm or so. Rainfall
amounts of 0.75 to 1.50 inches are expected, but localized 2"+
amounts may occur in any convective elements which will discuss
in a bit. These amounts may result in typical nuisance poor
drainage street flooding; but do not expect significant
flooding problems at this time given the relatively short
duration of the event.

Gusty to Briefly Strong Winds...

The other concern will be for a period of gusty southerly winds
with the band of heavy rainfall and a few embedded t-storms. The
low level jet is roughly 60-70 knots, so it is anomalous but
not extreme. While there will be an inversion, do expect most of
our area to warm sector with temperatures rising well into the
60s in many locations. This should allow for some of this wind
to mix down, particularly in any convective elements. We are
thinking 35-45 mph wind gusts for much of the region, but some
gusts up to 50 mph are possible towards the southeast New
England coast. It is marginal, but given heavy rain and still
leaves on many trees opted to issue a Wind Advisory for the
south coast and Coastal Essex County, which will be near the
core of a 70 knot southerly 925 mb jet.

Low Risk For Isolated Severe Weather...

The biggest uncertainty with this forecast is evaluating the low
risk for isolated severe weather. This is a classic low
Cape/high shear environment. Strong southerly flow will allow
dewpoints to climb well into the 50s to near 60. This coupled
with temps in the 60s should generate a few hundred J/KG of
Cape. Much of this instability is depicted in the 0-3 KM layer,
which tends to be the most important Cape. There are also
several hundred units of 0-1 KM helicity available. The HREF and
some other high resolution CAM/s do indicate some 2-5 KM updraft
helicity swaths.

Putting it all together, there is a low risk for a few severe
thunderstorms with the greatest risk for this across CT/RI and
SE MA. The main threat would be isolated straight line wind
damage and even a tornado/waterspout considering the amount of
0-1 KM helicity. That being said; we still feel that the overall
severe weather threat is low. While certain parameters are in
place, the mesoscale processes have to come together exactly for
this to be realized. The risk would increase if we are able to
develop a meso-low to harness these ingredients. The 00z NAM
hinted at this possibility, but the rest of the guidance does
not really show it. Certainly something will need to monitor.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH SATURDAY NIGHT/...
Heavy rain and a few embedded thunderstorms should exit the
Cape/Islands early this evening. Otherwise, much drier air works
in from the west allowing for clearing skies and cooler
temperatures. Lows should bottom out in the 30s across the
outlying areas with mainly 40s in some urban centers especially
along the coast. In fact, parts of the outer-Cape/Nantucket may
not drop below 50.

The main concern for tonight will be the potential for patchy
ground fog developing in the typically prone locations, given
the winds becoming light along with the wet ground from today/s
rain. While the fog should not be widespread, it may be dense in
a few typically prone spots.

&&

.LONG TERM /SUNDAY THROUGH FRIDAY/...

Big Picture...

Multiple shortwaves move through the northern jet stream during the
coming week. So expect more activity than in the past week. One
shortwave sweeps across the Northeast Sunday night and Monday.
Another shortwave moves through late Thursday, although timing may
shift a little.

Upper contour heights vary from above normal to below normal through
the week. Expect cooler than normal temperatures Monday in the west
and Tuesday all areas, then trending to above normal Thursday, then
normal Friday.

Details...

Sunday...

Upper ridge moves over the region Sunday, providing enough
subsidence for a pleasant day. The next shortwave trough and surface
low cross the Great Lakes during the day and move east. Expect
increasing sky cover during the afternoon/evening. Mixing reaches to
900-mb, with temps of minus 1 at that level supporting max temps in
the upper 40s and lower 50s, possibly a couple degrees milder on the
Cape and Islands. West winds will gust 25-30 mph early, but
expect diminishing winds as the ridge crests, which will
diminish the pressure gradient.

Sunday night-Monday...

Upper trough moves east, crossing New England late Monday.
Supporting upper jet of 140-kt shifts over the coast, with the right-
entrance region in place around midnight. Models show a coastal
secondary sfc low forming overnight and racing past the Cape/Islands
around 12Z Monday. Good lift should generate a period of
rain/showers overnight and Monday. Cold air advection aloft may turn
the precip over to snow over Western MA, but temperatures near the
ground should be warm enough to limit any accumulations to less than
an inch. Precipitation tapers off aroaund midday as the coastal low
moves off to the northeast. Could be a few lingering rain/snow
showers inland as the upper trough moves overhead. Temperatures cool
into the 30s and low 40s at night, then climb into the 40s and lower
50s Monday.

Tuesday-Wednesday...

Another ridge builds over the region Tuesday, then shifts east
Wednesday. Expect clearing skies early morning Tuesday, then fair
weather Tuesday and Wednesday. Temps aloft are at their coldest
Tuesday, with a minus 2C to minus 3C at 925-mb, but then warm up
again Wednesday to 6-8C. Expect highs in the 40s Tuesday and mainly
in the 50s Wednesday.

Thursday-Friday...

Low pressure stays in Canada and passes well to our north. Rotation
around the low will swing a cold front through our area Tuesday
afternoon and night. Could be some showers with this one, but most
of the jet dynamics moves across Nrn New England and Canada, so
support will be meager. Also, this is in Day 6/Day 7, so timing of
the front may change over the next few days.  Milder Thursday, then
fair weather Friday.  Cold air advection behind the front will drop
Friday temperatures about 10F from Thursday highs.

&&

.AVIATION /20Z FRIDAY THROUGH WEDNESDAY/...
Low - less than 30 percent.
Medium - 30 to 60 percent.
High - greater than 60 percent.

18z Update...

Overall moderate confidence.

Primarily MVFR to IFR across the region at this time. Watching a
line of heavy showers working into the CT River Valley at this
time. Extrapolation puts it into eastern sections about in the
20-22z timeframe. Tried my best to time it in the TAFs, but
there is still a +/- 1hr error bar. Based on upstream obs, with
the passage of the line, winds do turn from SSE to SW/WSW.
Expect a brief gust of 35-40kt with the line. Still pretty
strong winds at 2000ft and above, on the order of 50 to 60kts.
As a result, have included LLWS in many of the TAFs. That wind
shear will rapidly diminish as the line passes to the east.

As the front moves east of a location, rain will end within 3 to
4 hours, with remaining IFR/MVFR conditions transitioning to VFR
a couple of hours later. Thus expecting primarily VFR conditions
area wide after 04z this evening and lasting into the day
Saturday. Winds will be light west/southwest overnight, but will
transition to SE on Saturday. Should become a bit gusty after
18z (25kt+) especially across eastern areas. Although it's
beyond the bulk of the TAF period, could be another strong
frontal passage Saturday evening with a period of strong winds
Saturday evening. Later forecasts will pin those details down.

KBOS Terminal...Moderate confidence. Have removed any mention of
thunder, though a brief period of +SHRA and low visibilities
will accompany the frontal passage between 20-22z

KBDL Terminal...Moderate confidence. Very small chance for
thunder thru 20z. Following frontal passage, improving
conditions will develop after 21z.

Outlook /Sunday through Wednesday/...

Sunday: VFR. Windy with areas of gusts up to 30 kt.

Sunday Night through Monday: MVFR/IFR conditions possible.
Breezy. Chance SHRA.

Monday Night through Tuesday Night: VFR. Breezy.

Wednesday: VFR.

&&

.MARINE...
Forecaster Confidence Levels.

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

* Southerly Gales & High Seas Into this evening

Today and tonight...High Confidence. Anomalous closed low over
the Great Lakes will induce a southerly 60+ knot LLJ later today
into this evening. Although there will be an inversion, given
the region will warm sector and that heavy rain/convective
elements may tap the stronger winds aloft  have continued Gale
Warnings all waters. We expect southerly gale force wind gusts
of 30-40 knots later this morning and into early this evening;
before diminishing as the LLJ shifts east of the region. Seas
across the outer-waters should build to between 7 and 13 feet;
before gradually lowering later this evening and into the
overnight hours. Lastly, a few strong t-storms are possible this
afternoon and early this evening with even the low risk of a
waterspout.

Outlook /Sunday through Wednesday/...

Sunday: Low risk for Small Craft Advisory winds with gusts up
to 30 kt. Local rough seas.

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

Monday: Low risk for Small Craft Advisory winds with gusts up
to 25 kt. Local rough seas. Chance of rain showers.

Monday Night: Moderate risk for Small Craft Advisory winds with
gusts up to 30 kt. Areas of rough seas.

Tuesday: Moderate risk for Small Craft Advisory winds with
gusts up to 25 kt. Local rough seas.

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

Wednesday: Winds less than 25 kt. Seas less than 5 ft.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...Wind Advisory until 7 PM EST this evening for MAZ007-018>024.
RI...Wind Advisory until 7 PM EST this evening for RIZ004>008.
MARINE...Gale Warning until 7 PM EST this evening for ANZ231>235-237-
     251-256.
     Gale Warning until 5 PM EST this afternoon for ANZ230-236.
     Gale Warning until 10 PM EST this evening for ANZ250-254-255.

&&

SYNOPSIS...WTB/Frank
NEAR TERM...BL/Nash
SHORT TERM...Frank
LONG TERM...WTB
AVIATION...WTB/Nash
MARINE...WTB/Frank

Hazardous Weather Outlook
National Weather Service Boston/Norton MA
445 AM EST Fri Nov 12 2021

CTZ002>004-MAZ002>006-008>017-026-RIZ001>003-130945-
Hartford CT-Tolland CT-Windham CT-Western Franklin MA-
Eastern Franklin MA-Northern Worcester MA-Central Middlesex MA-
Western 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-Northern Middlesex MA-
Northwest Providence RI-Southeast Providence RI-Western Kent RI-
445 AM EST Fri Nov 12 2021

This Hazardous Weather Outlook is for northern Connecticut, central
Massachusetts, eastern Massachusetts, northeastern Massachusetts,
southeastern Massachusetts, western Massachusetts and northern
Rhode Island.

.DAY ONE...Today and tonight.

Heavy rain with embedded thunderstorms move into western
Massachusetts and Connecticut after 10 to 11 AM. This reaches eastern
Massachusetts and Rhode Island after 1 to 2 PM. There is a low risk
of an isolated severe storm. The main threats are damaging winds and
a tornado cannot be ruled out.

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

Scattered showers with perhaps a few rumbles of thunder late on
Saturday into Saturday night. Strong wind gusts are possible late on
Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

MAZ007-018>024-RIZ004>008-130945-
Eastern Essex MA-Western Plymouth MA-Eastern Plymouth MA-
Southern Bristol MA-Southern Plymouth MA-Barnstable MA-Dukes MA-
Nantucket MA-Eastern Kent RI-Bristol RI-Washington RI-Newport RI-
Block Island RI-
445 AM EST Fri Nov 12 2021

...WIND ADVISORY IN EFFECT FROM 8 AM THIS MORNING TO 7 PM EST THIS
EVENING...

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

.DAY ONE...Today and tonight.

Heavy rain with embedded thunderstorms move into eastern
Massachusetts and Rhode Island after 1 to 2 PM. There is a low risk
of an isolated severe storm. The main threats are damaging winds and
a tornado cannot be ruled out.

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

   Wind Advisory.

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

Scattered showers with perhaps a few rumbles of thunder late on
Saturday into Saturday night. Strong wind gusts are possible late on
Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

ANZ232>235-237-256-130945-
Nantucket Sound-Vineyard Sound-Buzzards Bay-Rhode Island Sound-
Block Island Sound-
Coastal Waters from Montauk NY to Marthas Vineyard extending out to
20 nm South of Block Island-
445 AM EST Fri Nov 12 2021

...GALE WARNING IN EFFECT UNTIL 7 PM EST THIS EVENING...

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

.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.

   Gale Warning.

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

Gale force gusts are possible late on Saturday into Saturday night
as low pressure moves across interior New England. TA few rumbles of
thunder cannot be ruled out as well.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ255-130945-
Coastal Waters extending out to 25 nm South of Marthas Vineyard and
Nantucket-
445 AM EST Fri Nov 12 2021

...GALE WARNING IN EFFECT UNTIL 10 PM EST THIS EVENING...

This Hazardous Weather Outlook is for Massachusetts coastal waters.

.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.

   Gale Warning.

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

Gale force gusts are possible late on Saturday into Saturday night
as low pressure moves across interior New England. TA few rumbles of
thunder cannot be ruled out as well.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ250-254-130945-
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-
445 AM EST Fri Nov 12 2021

...GALE WARNING IN EFFECT UNTIL 10 PM EST THIS EVENING...

This Hazardous Weather Outlook is for Massachusetts coastal waters.

.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.

   Gale Warning.

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

Gale force gusts are possible late on Saturday into Saturday night
as low pressure moves across interior New England. TA few rumbles of
thunder cannot be ruled out as well.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ231-251-130945-
Cape Cod Bay-Massachusetts Bay and Ipswich Bay-
445 AM EST Fri Nov 12 2021

...GALE WARNING IN EFFECT UNTIL 7 PM EST THIS EVENING...

This Hazardous Weather Outlook is for Massachusetts coastal waters.

.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.

   Gale Warning.

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

Gale force gusts are possible late on Saturday into Saturday night
as low pressure moves across interior New England. TA few rumbles of
thunder cannot be ruled out as well.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ230-236-130945-
Boston Harbor-Narragansett Bay-
445 AM EST Fri Nov 12 2021

...GALE WARNING IN EFFECT UNTIL 5 PM EST THIS AFTERNOON...

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

.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.

   Gale Warning.

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

Gale force gusts are possible late on Saturday into Saturday night
as low pressure moves across interior New England. TA few rumbles of
thunder cannot be ruled out as well.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

For more information on upcoming hazardous weather, please see the
Area Forecast Discussion on our webpage for the latest forecast
thinking. There is also our Enhanced Hazardous Weather Outlook at
www.weather.gov/box/ehwo

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 Boston/Norton MA
1248 PM EST Fri Nov 12 2021

CTZ002-003-MAZ003-004-010>012-026-121830-
Hartford CT-Tolland CT-Northwest Middlesex County MA-
Southern Worcester MA-Eastern Hampden MA-Northern Worcester MA-
Eastern Franklin MA-Eastern Hampshire MA-
1248 PM EST Fri Nov 12 2021

...An area of heavy rainfall with strong winds will impact portions
of northwestern Tolland, northern Hartford, western Worcester,
southeastern Hampshire, northwestern Middlesex, eastern Franklin and
southeastern Hampden Counties through 130 PM EST...

At 1248 PM EST, Doppler radar was tracking an area of heavy rainfall
with strong winds along a line extending from near Warwick to near
Ludlow to near Simsbury. Movement was east at 40 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Strong winds could cause minor damage such as downed
         branches.

Locations impacted include...
Worcester, Springfield, Chicopee, Enfield, Leominster, Fitchburg,
Amherst, Windsor, Agawam, West Springfield, Orange, Simsbury, Ludlow,
Bloomfield, Gardner, Holden, Longmeadow, Suffield, East Longmeadow
and Ellington.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when you hear thunder. Do not resume outdoor activities
until at least 30 minutes after the storm has passed.

These storms may intensify and become severe. Stay tuned to your
local media for updates and possible warnings.

&&

LAT...LON 4182 7293 4219 7253 4272 7239 4270 7165
      4242 7172 4193 7224
TIME...MOT...LOC 1747Z 248DEG 36KT 4270 7231 4222 7243 4184 7283

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

Gaucher

Special Weather Statement
National Weather Service Boston/Norton MA
133 PM EST Fri Nov 12 2021

CTZ003-004-MAZ004-005-012>017-RIZ001>004-006-121915-
Windham CT-Tolland CT-Southern Worcester MA-Suffolk MA-
Central Middlesex County MA-Eastern Norfolk MA-
Southeast Middlesex MA-Western Norfolk MA-Northern Bristol MA-
Northern Worcester MA-Eastern Kent RI-Northwest Providence RI-
Washington RI-Western Kent RI-Southeast Providence RI-
133 PM EST Fri Nov 12 2021

...A strong thunderstorm will impact portions of Windham,
southeastern Tolland, southwestern Suffolk, Norfolk, southeastern
Worcester, southeastern Middlesex, northwestern Bristol, northeastern
Washington, Kent and Providence Counties through 215 PM EST...

At 133 PM EST, Doppler radar was tracking a strong thunderstorm over
Plainfield, moving northeast at 75 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Strong winds could cause minor damage such as downed
         branches.

Locations impacted include...
Boston, Worcester, Providence, Quincy, Newton, Warwick, Cranston,
Pawtucket, Framingham, Brookline, East Providence, Woonsocket,
Marlborough, Shrewsbury, Coventry, Cumberland, Natick, Randolph,
North Providence and Franklin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when you hear thunder. Do not resume outdoor activities
until at least 30 minutes after the storm has passed.

&&

LAT...LON 4158 7179 4164 7179 4163 7196 4166 7216
      4171 7224 4167 7227 4167 7228 4236 7176
      4230 7104 4230 7103 4176 7136 4179 7137
      4178 7139 4174 7138 4168 7140 4169 7145
      4166 7144 4166 7141 4157 7147
TIME...MOT...LOC 1833Z 211DEG 65KT 4168 7192

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

RM

Special Weather Statement
National Weather Service Boston/Norton MA
135 PM EST Fri Nov 12 2021

MAZ004-005-010>012-026-121915-
Northwest Middlesex County MA-Southern Worcester MA-
Central Middlesex County MA-Eastern Hampden MA-Northern Worcester MA-
Eastern Hampshire MA-
135 PM EST Fri Nov 12 2021

...An area of heavy rain and strong winds will impact portions of
central Worcester, eastern Hampshire, northwestern Middlesex and
northeastern Hampden Counties through 215 PM EST...

At 135 PM EST, Doppler radar was tracking An area of heavy rain and
strong winds along a line extending from near Townsend to New
Braintree. Movement was east at 30 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Strong winds could cause minor damage such as downed
         branches.

Locations impacted include...
Worcester, Lowell, Leominster, Fitchburg, Marlborough, Shrewsbury,
Chelmsford, Dracut, Westford, Gardner, Hudson, Holden, Northborough,
Clinton, Palmer, Spencer, Pepperell, Tyngsborough, Leicester and
Groton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when you hear thunder. Do not resume outdoor activities
until at least 30 minutes after the storm has passed.

These storms may intensify and become severe. Stay tuned to your
local media for updates and possible warnings.

&&

LAT...LON 4269 7130 4230 7165 4223 7227 4271 7183
TIME...MOT...LOC 1834Z 270DEG 26KT 4269 7176 4230 7212

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

Gaucher

Special Weather Statement
National Weather Service Boston/Norton MA
203 PM EST Fri Nov 12 2021

MAZ017-RIZ001>005-122000-
Northern Bristol MA-Northwest Providence RI-Bristol RI-
Western Kent RI-Eastern Kent RI-Southeast Providence RI-
203 PM EST Fri Nov 12 2021

...Heavy rainfall may cause ponding in the typical low lying and
poor drainage areas in and around the Providence metro area until
300 PM EST...

At 203 PM EST, Doppler radar was tracking heavy rain across the
areas.

HAZARD...Heavy rainfall.

SOURCE...Radar indicated.

IMPACT...Rainfall may cause ponding in the typical low lying and
         poor drainage areas.

Locations impacted include...
Providence, Warwick, Cranston, Pawtucket, East Providence, Coventry,
Cumberland, North Providence, West Warwick, Johnston, Attleboro,
Smithfield, Lincoln, Central Falls, Barrington, Seekonk, East
Greenwich, Scituate and West Greenwich.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Avoid flooded areas. Do not attempt to cross flooded roadways. Turn
around, don't drown !

&&

LAT...LON 4160 7158 4186 7158 4192 7134 4172 7133
      4175 7136 4179 7137 4176 7139 4173 7138
      4172 7136 4167 7137 4169 7145 4166 7144
      4167 7143 4166 7141
TIME...MOT...LOC 1859Z 249DEG 3KT 4182 7139

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...<30 MPH

Gaucher

Special Weather Statement
National Weather Service Boston/Norton MA
320 PM EST Fri Nov 12 2021

MAZ005>007-122100-
Eastern Essex MA-Central Middlesex County MA-Western Essex MA-
320 PM EST Fri Nov 12 2021

...A strong thunderstorm will impact portions of Essex and
northeastern Middlesex Counties through 400 PM EST...

At 319 PM EST, Doppler radar was tracking a strong thunderstorm over
Lowell, moving northeast at 60 mph.

HAZARD...Winds in excess of 40 mph.

SOURCE...Radar indicated.

IMPACT...Strong winds could cause minor damage such as downed
         branches.

Locations impacted include...
Lowell, Lawrence, Haverhill, Methuen, Billerica, Chelmsford, Andover,
Dracut, Tewksbury, North Andover, Burlington, Wilmington, Westford,
Acton, Concord, Newburyport, Amesbury, North Reading, Bedford and
Ipswich.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when you hear thunder. Do not resume outdoor activities
until at least 30 minutes after the storm has passed.

&&

LAT...LON 4286 7085 4282 7081 4281 7087 4280 7083
      4281 7082 4281 7081 4271 7078 4277 7082
      4276 7083 4270 7083 4271 7080 4267 7073
      4248 7140 4270 7138 4270 7129 4274 7124
      4274 7119 4277 7118 4288 7089
TIME...MOT...LOC 2019Z 244DEG 51KT 4263 7131

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

RM