Severe Thunderstorm Warning 92, NWS Boston/Norton, MA

189 
WWUS51 KBOX 122152
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
552 PM EDT FRI AUG 12 2016

MAC011-013-015-122202-
/O.EXP.KBOX.SV.W.0092.000000T0000Z-160812T2200Z/
HAMPSHIRE MA-HAMPDEN MA-FRANKLIN MA-
552 PM EDT FRI AUG 12 2016

...THE SEVERE THUNDERSTORM WARNING FOR WESTERN HAMPSHIRE...
NORTHWESTERN HAMPDEN AND WEST CENTRAL FRANKLIN COUNTIES WILL EXPIRE
AT 600 PM EDT...
            
THE STORMS WHICH PROMPTED THE WARNING HAVE WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE...THE WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 4238 7301 4239 7301 4260 7296 4260 7269
      4216 7280 4225 7301 4231 7300 4231 7303
      4233 7306 4238 7307
TIME...MOT...LOC 2149Z 285DEG 28KT 4262 7315 4246 7318 4240 7339 4236
7363

$$

SIPPRELL

Area Forecast Discussion
National Weather Service Taunton MA
448 PM EDT FRI AUG 12 2016

.SYNOPSIS...
High heat and humidity will persist across the area through
Sunday, though some areas may be a few degrees cooler at times.
Scattered thunderstorms are expected through Sunday. A break in the
heat and showers will occur Monday into Tuesday before another
system approaches the region by Wednesday into Thursday.

&&

.NEAR TERM /UNTIL 6 AM SATURDAY MORNING/...
***Excessive Heat Warning is now in effect for northern
 Connecticut and northeastern Massachusetts, including the Boston
 and Hartford metro areas***

445 PM Update...Showers and thunderstorms continue, mainly across
Massachusetts at this time.  SPC Mesoanalysis shows 2500-3000 J/kg
of SBCAPE across a good portion of southern New England, providing
plenty of juice to keep storms going. Two main concerns with these
storms. The first and primary threat is heavy rain and flooding
and/or flash flooding. With PWATs well over 2 inches and forecast to
come up to near 2.5 inches, heavy rain is pretty much a given, as is
urban and poor drainage flooding. Two things will contribute to the
potential for flash flooding. One is training of cells over the same
area, the other is how quickly (or not) the storms move. Model
forecast Corfidi vectors show storms to move about 20 kts but
current upward propagation vectors are about 5 kts. Currently storms
are moving about 20 mph which will limit flash flood potential if
the storms don't continue to move over the same areas.

The secondary threat with these storms is wind. While the
environment is not particularly favorable for strong to damaging
winds, there is a modest amount of shear and winds have already
been gusty at the surface. That said, there is potential for a
some isolated wind damage, but not expecting anything widespread.

Tonight...Showers and thunderstorms should gradually diminish as we
move into the evening.  Patchy fog will develop, especially in the
interior valleys and anywhere that received rain today.  More
widespread fog and low clouds will move in along the south coast.
With the high dewpoints continuing overnight, low temperatures will
be quite warm, nearing or exceeding records (see Climate section
below).  Exception to this could be across NE MA where temperatures
may drop a little lower as a back door front drops south into NE MA.
There is a lot of uncertainty with the speed and progression of the
front.  See Short Term section below for more information.

&&

.SHORT TERM /6 AM SATURDAY MORNING THROUGH 6 PM SATURDAY/...
Saturday...Yet another interesting day is expected with the added
intrigue of a back door cold front moving into a portion of the
region.  Models don't seem to have a good handle on this at all with
different perspectives on the speed and timing of the front.  The
GFS is the most progressive with this front, bringing it into
southern New England during the overnight period prior to Saturday
and taking it all the way through the area to the I-91 corridor. The
ECMWF is much slower, not coming into the region until after 12Z
Saturday and only making it into extreme NE MA.  The NAM falls in
between these two solutions.  Tend to lean towards the ECMWF given
the strength of the heat and humidity, as well as some decent
southwesterly winds.  However, can't rule out the GFS solution
verifying either.

This makes for an extremely complicated forecast as this will
determine temperatures as well as a potential focus for showers and
thunderstorms.  At this point, went with a blend of the GFS/ECMWF,
which brings cooler temperatures into NE MA to a line roughly from
Groton, MA to Worcester, MA to Taunton, MA.  However, if the front
doesn't sag that far south then temperatures will be warmer south of
the front.  Dewpoints will be slightly lower behind the front,
dropping into the upper 60s to around 70.  That may be enough to
take the edge off the humidity but it will still be quite the warm
and humid day no matter where you are.

The best chance for heat indices over 100 degrees will be the lower
CT river valley and northern CT where we will hoist a heat advisory
once the current heat headlines expire at 7 PM.

Once again, our other concern is the potential for showers and
thunderstorms.  We have a better focus Saturday with the front
moving into the region.  However, this will also depend on the
timing and progress of the front.  If the GFS is correct, then a
good chunk of southern New England will be behind the front in the
more stable air.  If the ECMWF is correct, then much of the area
will be in the much more unstable air ahead of the front. Therefore,
still some uncertainty.  However, the airmass south of the front
will be quite conducive to showers and thunderstorms.  There is
quite a bit of instability in all the models (SBCAPE and MLCAPE
greater than 1500 J/kg) as well as decent shear (0-6km bulk shear
between 30 and 40 kts).  Given that, expect we have a better shot of
severe thunderstorms Saturday than we did today.

Again, with PWATs well above two inches (a good two to three STD
above normal), heavy rain, flooding, and flash flooding will be a
threat.  Especially in areas that received rain today and with any
storms that train.  While storms are expected to keep moving with
slightly stronger winds aloft, there is still potential for a storm
to get "stuck" on the front.  These storms would also potentially
cause some flooding.  Despite this potential for flash flooding,
feel the uncertainty with the progress of the front makes it nearly
impossible to determine which areas have the best chance of this
occurring and it won't be widespread enough to warrant issuing a
flash flood watch for the entire area.  The mid shift can re-
evaluate.

Secondary threats for storms tomorrow include the potential for
gusty, damaging winds as well as possibly a brief tornado.  The
higher shear numbers will allow storms to sustain themselves a bit
better than today.  In addition, with the front over the area, an
increase in low level shear, the high PWATs and low LCL's, we have a
good environment in place for brief, relatively weak tornadoes. The
highest risk for this is along any boundaries that develop as well
as along the front.  This threat is low, but something to keep an
eye on and be aware of.

&&

.LONG TERM /SATURDAY NIGHT THROUGH FRIDAY/...
HIGHLIGHTS...
* Periods of showers and thunderstorms will continue with heavy
  rainfall and a localized urban flood threat Saturday night into
  Monday

* Temperatures should drop below 90 on Monday through most of next
  week

* Another weather system approaches by the middle of next week

OVERVIEW...

12Z model suite in better agreement with the slow approach and
eventual passage of the cold front across the region. Looks like the
front will push slowly into N Mass by midday Sunday, then slowly
crossing the region through Sunday evening. Anomalous tropical
moisture continues to pump in around the periphery of the Bermuda
high off the eastern seaboard, with PWATs remaining 3 to 4 STD above
seasonal normals for the region. Will see continued threat for heavy
rainfall and localized flooding, with the best shot during the
afternoon and early nighttime hours. Some question as to whether
there will be another mid level short wave/possible MCS moving along
the front overnight Sunday night into Monday morning, as the NAM and
GGEM suggest. Have kept mention of showers/thunderstorms through
midday Monday.

With the stationary ridge across the mid Atlantic and off the coast
through at least mid week, along with the mid level zonal flow aloft
across the northern tier, the front will stall near or south of
south coastal areas. Weak high pressure/dry air will cross the
region Monday night and Tuesday. Model spread returns for next
possible system that looks to approach Tuesday night into late
Wednesday night or Thursday. Many questions in place as to whether
yet another mid level short wave approaches or it remains dry late
next week.

DETAILS...

Saturday night...Moderate confidence.

Backdoor front across eastern areas moves back NE as a warm front
Saturday evening as low pressure works E out of NY state into
northern New England. Will continue to see chance for showers/
thunderstorms across the region, with the best shot over N central
and NW Mass. PWATs remain in the 2.2 to 2.4 inch range, so the
threat for heavy rainfall and localized flooding also continues.

With dewpts in the lower-mid 70s, sultry conditions will continue
across the region. Overnight lows will be in the 70s, except may be
close to 80 in the urban centers. Another very uncomfortable night
for sleeping in non-air conditioned buildings.

Sunday and Sunday night...Moderate confidence.

While model suite continues to signal low pressure and its
associated H5 short wave passing across northern New England Sunday,
timing issues persist with the passage of the associated cold front.
This is mainly due to the positioning of the mid level ridge off the
mid Atlantic and SE U.S. coast and whether it remains further N as
some models suggest, slowing the progress of the front.

Looks like best shot for showers/thunderstorms will occur across N
Mass by late Sunday morning, then will push slowly across the
remainder of the region through the day. Will still see the threat
of heavy rainfall and localized flooding with PWATs remaining in the
2.2 to 2.4 inch range pretty much anywhere across the region Sunday
afternoon into Sunday night. Big question is whether a possible MCS
moves along the front late Sunday night through the pre dawn hours
Monday as the NAM and Canadian GGEM suggest. Did keep chance POPs
going due to wide model solution spread.

Looks like another day of 90+ high temps on Sunday with dewpts in
the lower-mid 70s.  Best shot for high heat index values, possibly
around 100 degrees, across east coastal Mass to the south coast.

Monday and Tuesday...Moderate confidence.

As the front slowly sags south of the region, will see temps drop
about 5-10 degrees from the searing heat over the weekend. However,
it will remain muggy though dewpts will drop back to the 60s so
there will be some relief compared to this weekend.

Ridging in the mid levels will build across the region Monday night
and Tuesday. Should be mainly dry, but can not rule out isold
showers Tuesday afternoon and evening as the high moves offshore.

Wednesday through Friday...Low confidence.

Continued mid level zonal flow will remain across the northeast with
the Bermuda high extending from the mid Atlantic coast to the
western Atlantic. May see another system approach Wednesday night or
Thursday that will tap into the continue tropical moisture feed
around the high offshore. This will be dependent upon timing which
remains wide amongst the model suite.  Kept a dry forecast going for
now on Friday as another ridge may build across the northeast.

&&

.AVIATION /21Z FRIDAY THROUGH WEDNESDAY/...
Forecaster Confidence Levels.

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

Short Term /through Saturday/...

Through 00Z...Moderate confidence. SCT +SHRA/TSRA expected across
much of the area, lowering conditions to MVFR/IFR briefly. Gusty
winds are also expected with any storms that move through.
Otherwise, VFR conditions prevail.

Tonight...Moderate confidence. Mainly VFR conditions away from the
S coast, with patchy fog and localized IFR conditions over some of
the interior valleys. Along the south coast, MVFR/IFR conditions
are expected in low clouds and fog.

Saturday...Moderate confidence. Some uncertainty but may encounter
more widespread MVFR cigs, especially across northeastern MA.
Occasional IFR cigs/vsbys possible in vicinity of afternoon and
evening thunderstorms.

KBOS TAF...High confidence. Generally VFR conditions expected today
into tonight, although occasional MVFR ceilings possible in vicinity
of afternoon/evening showers and thunderstorms. MVFR cigs may
persist during much of Saturday as a consequence of a NE flow as
well as more showers and embedded thunderstorms.

KBDL TAF...High confidence. VFR conditions expected through the
period except patchy fog may develop late tonight. Also, conditions
may lower briefly to MVFR or even IFR in vicinity of any
thunderstorms.

Outlook /Saturday Night through Wednesday/...

Saturday night through Monday...Moderate confidence in exact timing,
but high confidence that there will be CIG and VSBY restrictions
into Sunday night.

Will see rounds of showers and scattered thunderstorms through this
timeframe, with the best shot Saturday night into Sunday night. Low
clouds and fog patches expected at times during the overnight at
early morning hours, with periods of MVFR-IFR conditions.

VSBY and CIG restrictions should decrease by midday Monday.

Monday night-Tuesday...Should see mainly VFR conditions as high
pressure moves across. Can not rule out patchy fog and local MVFR-
IFR conditions late Monday night into Tuesday morning.

Wednesday...Low confidence. May see areas of MVFR conditions with
scattered showers/thunderstorms as warm front approaches. Timing
very certain.

&&

.MARINE...
Forecaster Confidence Levels.

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

Short Term /through Saturday/...

High confidence.  Small craft advisories continue through tonight
for the southern waters and the outer waters for wind gusts greater
than 25 kts and for the outer waters, seas greater than 5 feet.
Believe most of these will be allowed to expire by Saturday morning
but depending on the progress of a back door cold front, they may
need to be extended.  In addition, visibilities will be limited at
times in showers and thunderstorms this evening and again tomorrow
afternoon and evening and in fog during the overnight.

Outlook /Saturday Night through Wednesday/...

Moderate confidence in trends. Low confidence on exact timing.

Mainly S-SW winds expected through Sunday night. Gusts may reach 20
kt at times  with seas building to around 5 ft across the southern
waters late Saturday night through Sunday night so small crafts may
be needed there. Visibility restrictions in areas of fog along
with showers and scattered thunderstorms at times.

Light N-NW winds Monday will shift to E-NE Monday night into Tuesday
as high pressure builds across. Winds shift back to S-SW Wednesday
with gusts up to 20-25 kt on the southern waters with seas up to 5-6
ft. Visibility restrictions in overnight/early morning patchy fog
each day. Chance of showers/thunderstorms Wed/Wed night with another
system possible.

&&

.CLIMATE...
Record high minimum temperatures for August 12 as follows:

BOS  77 set in 1988
BDL  74 set in 1905
PVD  76 set in 1944
ORH  74 set in 1896

Record high minimum temperatures for August 13 as follows:

BOS  75 set in 1944
BDL  74 set in 2005
PVD  77 set in 2005
ORH  75 set in 1896

Record high minimum temperatures for August 14 as follows:

BOS  76 set in 2002
BDL  77 set in 1988
PVD  77 set in 1988
ORH  75 set in 1988

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...Excessive Heat Warning until 7 PM EDT this evening for
     CTZ002>004.
     Air Quality Alert until 11 PM EDT this evening for CTZ002-003.
MA...Heat Advisory until 7 PM EDT this evening for MAZ003-004-
     010>012-017>019-026.
     Excessive Heat Warning until 7 PM EDT this evening for
     MAZ005>007-013>016.
RI...Heat Advisory until 7 PM EDT this evening for RIZ001>004.
MARINE...Small Craft Advisory until 2 AM EDT Saturday for ANZ231>234.
     Small Craft Advisory until 4 AM EDT Saturday for ANZ235-237.
     Small Craft Advisory until 11 PM EDT this evening for ANZ250.
     Small Craft Advisory until 8 AM EDT Saturday for ANZ254>256.

&&

SYNOPSIS...RLG/EVT
NEAR TERM...RLG
SHORT TERM...RLG
LONG TERM...EVT
AVIATION...RLG/EVT
MARINE...RLG/EVT
CLIMATE...Staff

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAUNTON MA
226 PM EDT FRI AUG 12 2016

MAZ002-008-009-020>024-RIZ005>008-131830-
WESTERN FRANKLIN MA-WESTERN HAMPSHIRE MA-WESTERN HAMPDEN MA-
SOUTHERN BRISTOL MA-SOUTHERN PLYMOUTH MA-BARNSTABLE MA-DUKES MA-
NANTUCKET MA-BRISTOL RI-WASHINGTON RI-NEWPORT RI-BLOCK ISLAND RI-
226 PM EDT FRI AUG 12 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE EAST SLOPES OF THE
BERKSHIRES AND THE SOUTH COAST OF MASSACHUSETTS AND RHODE ISLAND
INCLUDING CAPE COD AND THE ISLANDS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE IS AN ISOLATED RISK FOR STRONG TO SEVERE THUNDERSTORMS
TODAY. MAIN RISK IS FOR HEAVY RAIN WHICH COULD LEAD TO URBAN AND
POOR DRAINAGE FLOODING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

SATURDAY INTO SUNDAY...HOT AND VERY HUMID WEATHER WITH HEAT INDEX
VALUES UP TO 100 LIKELY DURING EACH AFTERNOON. HEAT HEADLINES WILL
LIKELY BE NEEDED.

SATURDAY THROUGH SUNDAY NIGHT...ROUNDS OF SHOWERS AND THUNDERSTORMS
ARE EXPECTED WITH AT LEAST LOCALLY HEAVY RAINFALL AT TIMES.
DESPITE OUR CURRENT DROUGHT...THERE WILL BE THE RISK FOR LOCALIZED
FLOODING. IN ADDITION...THERE WILL ALSO BE SOME RISK FOR STRONG TO
SEVERE THUNDERSTORMS OVER THIS PERIOD BUT CONFIDENCE ON TIMING IS
LOW.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

CTZ004-MAZ005>007-013>016-131830-
WINDHAM CT-CENTRAL MIDDLESEX MA-WESTERN ESSEX MA-EASTERN ESSEX MA-
WESTERN NORFOLK MA-SOUTHEAST MIDDLESEX MA-SUFFOLK MA-
EASTERN NORFOLK MA-
226 PM EDT FRI AUG 12 2016

...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 7 PM EDT THIS EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN CONNECTICUT AND
NORTHEASTERN MASSACHUSETTS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   EXCESSIVE HEAT WARNING.

THERE IS AN ISOLATED RISK FOR STRONG TO SEVERE THUNDERSTORMS
TODAY. MAIN RISK IS HEAVY RAIN WHICH COULD LEAD TO URBAN AND POOR
DRAINAGE FLOODING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

SATURDAY INTO SUNDAY...HOT AND VERY HUMID WEATHER WITH HEAT INDEX
VALUES UP TO 100 LIKELY DURING EACH AFTERNOON. HEAT HEADLINES WILL
LIKELY BE NEEDED.

SATURDAY THROUGH SUNDAY NIGHT...ROUNDS OF SHOWERS AND
THUNDERSTORMS ARE EXPECTED WITH AT LEAST LOCALLY HEAVY RAINFALL AT
TIMES. DESPITE OUR CURRENT DROUGHT...THERE WILL BE THE RISK FOR
LOCALIZED FLOODING. IN ADDITION...THERE WILL ALSO BE SOME RISK FOR
STRONG TO SEVERE THUNDERSTORMS OVER THIS PERIOD BUT CONFIDENCE ON
TIMING IS LOW.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

MAZ003-004-010>012-017>019-026-RIZ001>004-131830-
EASTERN FRANKLIN MA-NORTHERN WORCESTER MA-EASTERN HAMPSHIRE MA-
EASTERN HAMPDEN MA-SOUTHERN WORCESTER MA-NORTHERN BRISTOL MA-
WESTERN PLYMOUTH MA-EASTERN PLYMOUTH MA-NORTHERN MIDDLESEX MA-
NORTHWEST PROVIDENCE RI-SOUTHEAST PROVIDENCE RI-WESTERN KENT RI-
EASTERN KENT RI-
226 PM EDT FRI AUG 12 2016

...HEAT ADVISORY IN EFFECT UNTIL 7 PM EDT THIS EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL
MASSACHUSETTS...EASTERN MASSACHUSETTS...SOUTHEASTERN
MASSACHUSETTS...WESTERN MASSACHUSETTS AND NORTHERN RHODE ISLAND.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   HEAT ADVISORY.

THERE IS AN ISOLATED RISK FOR STRONG TO SEVERE THUNDERSTORMS
TODAY. MAIN RISK IS HEAVY RAIN WHICH COULD LEAD TO URBAN AND POOR
DRAINAGE FLOODING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

SATURDAY INTO SUNDAY...HOT AND VERY HUMID WEATHER WITH HEAT INDEX
VALUES UP TO 100 LIKELY DURING EACH AFTERNOON. HEAT HEADLINES WILL
LIKELY BE NEEDED.

SATURDAY THROUGH SUNDAY NIGHT...ROUNDS OF SHOWERS AND
THUNDERSTORMS ARE EXPECTED WITH AT LEAST LOCALLY HEAVY RAINFALL AT
TIMES. DESPITE OUR CURRENT DROUGHT...THERE WILL BE THE RISK FOR
LOCALIZED FLOODING. IN ADDITION...THERE WILL ALSO BE SOME RISK FOR
STRONG TO SEVERE THUNDERSTORMS OVER THIS PERIOD BUT CONFIDENCE ON
TIMING IS LOW.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
 CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

CTZ002-003-131830-
HARTFORD CT-TOLLAND CT-
226 PM EDT FRI AUG 12 2016

...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 7 PM EDT THIS EVENING...
...AIR QUALITY ALERT IN EFFECT UNTIL 11 PM EDT THIS EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN CONNECTICUT.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE
INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS.

   EXCESSIVE HEAT WARNING.
   AIR QUALITY ALERT.

THERE IS AN ISOLATED RISK FOR STRONG TO SEVERE THUNDERSTORMS
TODAY. MAIN RISK IS HEAVY RAIN WHICH COULD LEAD TO URBAN AND POOR
DRAINAGE FLOODING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

SATURDAY INTO SUNDAY...HOT AND VERY HUMID WEATHER WITH HEAT INDEX
VALUES UP TO 100 LIKELY DURING EACH AFTERNOON. HEAT HEADLINES WILL
LIKELY BE NEEDED.

SATURDAY THROUGH SUNDAY NIGHT...ROUNDS OF SHOWERS AND
THUNDERSTORMS ARE EXPECTED WITH AT LEAST LOCALLY HEAVY RAINFALL AT
TIMES. DESPITE OUR CURRENT DROUGHT...THERE WILL BE THE RISK FOR
LOCALIZED FLOODING. IN ADDITION...THERE WILL ALSO BE SOME RISK FOR
STRONG TO SEVERE THUNDERSTORMS OVER THIS PERIOD BUT CONFIDENCE ON
TIMING IS LOW.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
 CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

ANZ230>237-250-251-254>256-131830-
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-
226 PM EDT FRI AUG 12 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MASSACHUSETTS AND RHODE
ISLAND COASTAL WATERS.

.DAY ONE...THIS AFTERNOON AND 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...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
 CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

RLG

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
356 PM EDT FRI AUG 12 2016

MAZ005-006-014-122045-
SOUTHEAST MIDDLESEX MA-CENTRAL MIDDLESEX COUNTY MA-WESTERN ESSEX MA-
356 PM EDT FRI AUG 12 2016

...STRONG THUNDERSTORMS SWEEPING ACROSS SOUTHWESTERN ESSEX...
NORTHEASTERN SUFFOLK AND EAST CENTRAL MIDDLESEX COUNTIES...

AT 356 PM EDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM OVER
CONCORD...OR 7 MILES SOUTH OF CHELMSFORD...MOVING EAST AT 30 MPH.

WINDS IN EXCESS OF 30 MPH WILL ACCOMPANY THIS STORM. THESE STORMS
MAY INTENSITY AND BECOME CAPABLE OF PRODUCING DAMAGE. STAY TUNED FOR
UPDATED STATEMENTS AND POSSIBLE WARNINGS.

LOCATIONS IMPACTED INCLUDE...
CAMBRIDGE...SOMERVILLE...WALTHAM...MALDEN...MEDFORD...ARLINGTON...
EVERETT...BILLERICA...WOBURN...CHELSEA...ANDOVER...LEXINGTON...
TEWKSBURY...NORTH ANDOVER...MELROSE...SAUGUS...WAKEFIELD...READING...
BELMONT AND BURLINGTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT LIGHTNING WAS OCCURRING. LIGHTNING CAN STRIKE FAR AWAY FROM
THE STORM. GO INSIDE A BUILDING OR VEHICLE. WAIT AT LEAST 30 MINUTES
UNTIL AFTER THE STORM HAS PASSED TO RESUME OUTDOOR ACTIVITIES.

&&

LAT...LON 4265 7103 4257 7103 4257 7105 4255 7107
      4253 7107 4252 7104 4247 7105 4245 7103
      4241 7103 4239 7106 4239 7107 4238 7108
      4239 7143 4252 7146
TIME...MOT...LOC 1956Z 264DEG 28KT 4249 7137

SIPPRELL

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
414 PM EDT FRI AUG 12 2016

CTZ004-MAZ012-RIZ001-122100-
WINDHAM CT-SOUTHERN WORCESTER MA-NORTHWEST PROVIDENCE RI-
414 PM EDT FRI AUG 12 2016

...STRONG THUNDERSTORMS SWEEPING ACROSS NORTHEASTERN WINDHAM...
NORTHWESTERN BRISTOL...SOUTH CENTRAL WORCESTER AND NORTHERN
PROVIDENCE COUNTIES...

AT 414 PM EDT...DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG
A LINE EXTENDING FROM MILLVILLE TO DUDLEY TO NEAR SOUTHBRIDGE.
MOVEMENT WAS SOUTHEAST AT 20 MPH.

WINDS IN EXCESS OF 30 MPH WILL ACCOMPANY WITH THESE STORMS. THESE
STORMS MAY INTENSITY AND BECOME CAPABLE OF PRODUCING DAMAGE. STAY
TUNED FOR UPDATED STATEMENTS AND POSSIBLE WARNINGS.

LOCATIONS IMPACTED INCLUDE...
WOONSOCKET...CUMBERLAND...NORTH PROVIDENCE...SMITHFIELD...LINCOLN...
CENTRAL FALLS...KILLINGLY...WEBSTER...SOUTHBRIDGE...BURRILLVILLE...
OXFORD...UXBRIDGE...CHARLTON...NORTH SMITHFIELD...DUDLEY...
GLOCESTER...PUTNAM...THOMPSON...BLACKSTONE AND DOUGLAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT LIGHTNING WAS OCCURRING. LIGHTNING CAN STRIKE FAR AWAY FROM
THE STORM. GO INSIDE A BUILDING OR VEHICLE. WAIT AT LEAST 30 MINUTES
UNTIL AFTER THE STORM HAS PASSED TO RESUME OUTDOOR ACTIVITIES.

&&

LAT...LON 4209 7206 4207 7161 4192 7138 4189 7138
      4187 7148 4182 7210
TIME...MOT...LOC 2014Z 298DEG 19KT 4202 7157 4203 7192 4201 7207

SIPPRELL

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAUNTON MA
448 PM EDT FRI AUG 12 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0305 PM     TSTM WND DMG     SOUTHAMPTON             42.23N  72.73W
08/12/2016                   HAMPSHIRE          MA   BROADCAST MEDIA

            TREE DOWN ON WIRES AT 21 OLD COUNTY ROAD

&&

AED

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
458 PM EDT FRI AUG 12 2016

CTZ004-MAZ017-RIZ001>003-122145-
WINDHAM CT-NORTHERN BRISTOL MA-SOUTHEAST PROVIDENCE RI-
WESTERN KENT RI-NORTHWEST PROVIDENCE RI-
458 PM EDT FRI AUG 12 2016

...STRONG THUNDERSTORMS CONTINUING THROUGH SOUTHEASTERN WINDHAM...
WEST CENTRAL BRISTOL...WEST CENTRAL KENT AND SOUTHERN PROVIDENCE
COUNTIES...

AT 456 PM EDT...DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG
A LINE EXTENDING FROM WOONSOCKET TO GLOCESTER TO NEAR EASTFORD.
MOVEMENT WAS SOUTHEAST AT 25 MPH.

WINDS IN EXCESS OF 40 MPH WILL ACCOMPANY WITH THESE STORMS. THESE
STORMS MAY INTENSITY AND BECOME CAPABLE OF PRODUCING DAMAGE. STAY
TUNED FOR UPDATED STATEMENTS AND POSSIBLE WARNINGS.

LOCATIONS AND SURROUNDING AREAS IMPACTED INCLUDE...
PROVIDENCE...CRANSTON...PAWTUCKET...TAUNTON...CUMBERLAND...
ATTLEBORO...AND SEEKONK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT LIGHTNING WAS OCCURRING. LIGHTNING CAN STRIKE FAR AWAY FROM
THE STORM. GO INSIDE A BUILDING OR VEHICLE. WAIT AT LEAST 30 MINUTES
UNTIL AFTER THE STORM HAS PASSED TO RESUME OUTDOOR ACTIVITIES.

&&

LAT...LON 4167 7213 4177 7214 4185 7172 4194 7142
      4187 7110 4177 7136 4179 7138 4177 7139
      4165 7204
TIME...MOT...LOC 2056Z 286DEG 21KT 4200 7149 4188 7172 4191 7205

SIPPRELL

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
507 PM EDT FRI AUG 12 2016

CTZ004-MAZ017-RIZ001>003-122200-
WINDHAM CT-NORTHERN BRISTOL MA-SOUTHEAST PROVIDENCE RI-
WESTERN KENT RI-NORTHWEST PROVIDENCE RI-
507 PM EDT FRI AUG 12 2016

...STRONG THUNDERSTORMS SWEEPING THROUGH WINDHAM...WEST CENTRAL
BRISTOL...NORTHWESTERN BRISTOL...WEST CENTRAL KENT AND PROVIDENCE
COUNTIES...

AT 506 PM EDT...DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG
A LINE EXTENDING FROM NEAR NORTH SMITHFIELD TO NEAR GLOCESTER TO NEAR
PUTNAM TO NEAR KILLINGLY TO NEAR EASTFORD. MOVEMENT WAS SOUTHEAST AT
20 MPH.

WINDS IN EXCESS OF 30 MPH WILL ACCOMPANY WITH THESE STORMS. THESE
STORMS MAY INTENSITY AND BECOME CAPABLE OF PRODUCING DAMAGE. STAY
TUNED FOR UPDATED STATEMENTS AND POSSIBLE WARNINGS.

LOCATIONS IMPACTED INCLUDE...
PROVIDENCE...WARWICK...CRANSTON...PAWTUCKET...TAUNTON...
EAST PROVIDENCE...COVENTRY...CUMBERLAND...NORTH PROVIDENCE...
JOHNSTON...NORTH ATTLEBOROUGH...WINDHAM...PLAINFIELD...ATTLEBORO...
SMITHFIELD...LINCOLN...CENTRAL FALLS...KILLINGLY...
BURRILLVILLE AND SEEKONK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT LIGHTNING WAS OCCURRING. LIGHTNING CAN STRIKE FAR AWAY FROM
THE STORM. GO INSIDE A BUILDING OR VEHICLE. WAIT AT LEAST 30 MINUTES
UNTIL AFTER THE STORM HAS PASSED TO RESUME OUTDOOR ACTIVITIES.

&&

LAT...LON 4167 7213 4191 7216 4197 7155 4187 7109
      4176 7136 4178 7137 4179 7137 4176 7139
      4165 7204
TIME...MOT...LOC 2106Z 296DEG 16KT 4196 7151 4188 7162 4190 7177 4186
7188 4187 7206

SIPPRELL

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE TAUNTON MA
516 PM EDT FRI AUG 12 2016

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0258 PM     TSTM WND DMG     SOUTHAMPTON             42.23N  72.73W
08/12/2016                   HAMPSHIRE          MA   BROADCAST MEDIA

            TREE DOWN ON COTTAGE STREET

0259 PM     TSTM WND DMG     MONTGOMERY              42.20N  72.80W
08/12/2016                   HAMPDEN            MA   AMATEUR RADIO

            TREE AND WIRES DOWN ON MAIN ROAD...NORTH ROAD...AND
            PITCHER STREET. WIRE ON FIRE AT MAIN ROAD AND PITCHER
            STREET.

0305 PM     TSTM WND DMG     SOUTHAMPTON             42.23N  72.73W
08/12/2016                   HAMPSHIRE          MA   BROADCAST MEDIA

            TREE DOWN ON WIRES AT 21 OLD COUNTY ROAD

0315 PM     TSTM WND DMG     WESTFIELD               42.14N  72.76W
08/12/2016                   HAMPDEN            MA   AMATEUR RADIO

            LARGE LIMB AND WIRES DOWN ON CYCLE STREET.

0315 PM     TSTM WND DMG     WESTFIELD               42.14N  72.76W
08/12/2016                   HAMPDEN            MA   AMATEUR RADIO

            TREE DOWN ON SHAKER ROAD

0315 PM     TSTM WND DMG     OXFORD                  42.12N  71.87W
08/12/2016                   WORCESTER          MA   AMATEUR RADIO

            TREE AND WIRES DOWN ON WORCESTER ROAD /ROUTE
            12/...WIRES DOWN ON OLD SOUTHBRIDGE ROAD

0315 PM     LIGHTNING        WEST BROOKFIELD         42.24N  72.15W
08/12/2016                   WORCESTER          MA   AMATEUR RADIO

            TREE DOWN ON POWER LINES NEAR WICKABOG LAKE CAUSING
            POWER OUTAGE

0335 PM     LIGHTNING        OXFORD                  42.12N  71.87W
08/12/2016                   WORCESTER          MA   AMATEUR RADIO

            LIGHTNING STRIKE ON HIGH TENSION WIRES...DEBRIS CLEARED
            FROM ROADWAY

0425 PM     LIGHTNING        BEDFORD                 42.48N  71.27W
08/12/2016                   MIDDLESEX          MA   AMATEUR RADIO

            WIRES DOWN ON PAGE ROAD...TREE DOWN ON OLD BILLERICA
            ROAD

0430 PM     LIGHTNING        WAKEFIELD               42.50N  71.07W
08/12/2016                   MIDDLESEX          MA   AMATEUR RADIO

            TREE DOWN ON STEADMAN STREET

0448 PM     FLOOD            DUDLEY                  42.05N  71.93W
08/12/2016                   WORCESTER          MA   AMATEUR RADIO

            ONE FOOT OF STREET FLOODING ON OXFORD AVENUE AT PINE
            STREET

&&

EVT