Severe Thunderstorm Warning 108, NWS Boston/Norton, MA

514 
WWUS51 KBOX 191942
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
342 PM EDT FRI AUG 19 2011

MAC011-191952-
/O.EXP.KBOX.SV.W.0108.000000T0000Z-110819T1945Z/
FRANKLIN MA-
342 PM EDT FRI AUG 19 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN FRANKLIN COUNTY
WILL EXPIRE AT 345 PM EDT...

THE STORM HAS PROGRESSED WEST AND HAS MOVED OUT OF THE WARNED AREA. 
HEAVY RAINS WILL CONTINUE TO IMPACT EXTREME WESTERN PORTIONS OF 
FRANKLIN COUNTY WHICH IS UNDER A FLASH FLOOD WARNING UNTIL 430 PM.

LAT...LON 4274 7302 4273 7266 4272 7266 4255 7295
      4256 7298 4257 7298 4263 7296 4266 7296
      4266 7299 4268 7299 4270 7296 4270 7303
      4274 7303
TIME...MOT...LOC 1942Z 094DEG 3KT 4264 7295

$$

SIPPRELL

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAUNTON MA
249 PM EDT FRI AUG 19 2011

.SYNOPSIS...
HIGH PRESSURE OFFSHORE WILL BRING WARM AND HUMID WEATHER INTO THE
WEEKEND. WHILE MUCH OF THE PERIOD WILL BE DRY A FEW
SHOWERS/THUNDERSTORMS ARE EXPECTED AT TIMES. THE BEST CHANCE FOR
WIDESPREAD SHOWERS AND THUNDERSTORMS WILL BE SUNDAY AFTERNOON AND
NIGHT. DRY AND SEASONABLE WEATHER FOLLOWS EARLY TO THE MIDDLE OF
NEXT WEEK.

&&

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

245 PM MESOSCALE UPDATE...

ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS CONTINUED TO DEVELOP
ACROSS THE REGION THIS AFTERNOON.  THIS A RESULT OF THE UPPER LEVEL
TROUGH AND COOL POOL ALOFT.  SPC MESO-ANALYSIS PAGE SHOWING MLCAPE
VALUES OF 1500 TO 2500 J/KG ACROSS MUCH OF THE REGION.  PEA TO PENNY
SIZE HAIL HAS BEEN REPORTED WITH THE STRONGER STORMS AS A RESULT OF
THE COOL POOL ALOFT.

0 TO 6 KM SHEAR VALUES ARE EXTREMELY WEAK GENERALLY AROUND 10
KNOTS.  THEREFORE...NOT EXPECTING WIDESPREAD SEVERE WEATHER.
HOWEVER...ISOLATED STRONG TO SEVERE THUNDERSTORMS WILL REMAIN
POSSIBLE INTO THE EVENING HOURS GIVEN THE INSTABILITY AND COOL POOL
ALOFT.  THE MAIN THREAT WILL BE HAIL WITH A SECONDARY CONCERN FOR
GUSTY WINDS...ESPECIALLY WITH A COLLAPSING CORE.

THE MAIN CONCERN WITH ANY SHOWERS AND THUNDERSTORMS THIS
AFTERNOON/EVENING WILL REVOLVE AROUND LOCALLY HEAVY RAINFALL.  THE
STORMS WILL BE EXTREMELY SLOW MOVERS AND PERHAPS STATIONARY AS A
RESULT OF THE WEAK WIND FIELDS.  THIS MAY RESULT IN VERY ISOLATED
AND LOCALIZED FLOODING.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SATURDAY/...
TONIGHT... THE UPPER SHORTWAVE WILL STILL BE TRANSITING NEW
ENGLAND OVERNIGHT BUT WITH THE COLDEST TEMPS ALOFT MOVING OFF TO
THE EAST SO BETWEEN DIURNAL TRENDS AND SLIGHT WARMING ALOFT WE
SHOULD SEE THE AIRMASS STABILIZE AFTER SUNSET. THE SCATTERED
SHOWERS/TSTMS SHOULD LINGER IN THE EVENING...BUT WOULD EXPECT
THESE WILL WIND DOWN BY 11 PM. OTHERWISE RAINFREE BUT STILL HUMID
WITH LIGHT FLOW OVERNIGHT...SO FOG AREAS SHOULD AGAIN FORM. WITH
DEWPOINTS IN THE UPPER 50S NORTHWEST AND 60S ELSEWHERE...THIS
RANGE LOOKS FINE FOR MIN TEMPS.

SATURDAY...
THE FOG BURNS OFF AGAIN DURING THE MORNING...THEN SUNSHINE SHOULD
MIX US AGAIN TO AT LEAST 850 MB AND WITH SOME POTENTIAL TO EXTEND
HIGHER. 850 MB TEMPS ARE AGAIN FORECAST AT 14-15C WITH 800 MB
TEMPS AT 10-11C...EQUIV TO 15-16C AT 850 MB. SO FULL MIXING WOULD
SUPPORT MAX TEMPS AGAIN IN THE MID 80S...COOLER AT THE COAST.

THE NAM AND GFS BOTH HINT AT SURFACE HIGH PRESSURE GRAZING PAST
US...BUT WITH THE UPPER SHORTWAVE NEARBY TO THE EAST. THERE ARE
MINOR CHANGES TO THE AIRMASS WITH DEWPOINTS A LITTLE DRIER IN THE
NORTHWEST...BUT STILL 60S ACROSS MUCH OF OUR AREA. 500 MB TEMPS
ARE FORECAST TO WARM A LITTLE AS WELL...WITH MID LEVEL LAPSE RATES
DOWN A LITTLE TO 6C/KM. CAPES ARE STILL NEAR 1000 J/KG...HIGHER IN
THE SOUTH. OVERALL...THIS IS NOT AS GOOD A SETUP AS TODAY BUT IT
SEEMS ENOUGH TO JUSTIFY SCATTERED AFTERNOON/EVENING CONVECTION.

&&

.LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
HIGHLIGHTS...

* HEAVY SHOWERS/STRONG TSTMS WITH MINOR FLOOD THREAT POSSIBLE
SUN/SUN NGT
* NOT AS WARM AND LESS HUMID EARLY NEXT WEEK
* WARM AND MORE HUMID WEATHER POSSIBLY RETURNS MID TO LATE NEXT WEEK

MODEL PREFERENCES...
ACTIVE WEATHER PATTERN THIS PERIOD WITH NORTHERN STREAM JET SHOWING
SIGNS OF AUTUMN GIVEN AMPLITUDE/DEPTH OF TROFS AND ASSOCIATED
VORTICES.  FOCUS THIS PERIOD WILL BE SUN/SUN NIGHT AS ANOMALOUS TROF
AND ATTENDING COLD FRONT APPROACHES NEW ENGLAND. LARGE TIMING
DIFFERENCES HERE WITH THE ECMWF/GEFS AND NAM NOTICEABLY FASTER THAN
THE 00Z GFS.  THE 21Z/18 SREF IS ALSO FASTER THAN THE 00Z GFS. THUS
APPEARS THE GFS IS A SLOW OUTLIER. AS A RESULT THIS FORECAST WILL BE
BASED ON A NON-GFS SOLUTION.

SATURDAY NIGHT...
SHOULD BE QUIET/DRY AS SHORT WAVE RIDGING DEVELOPS OVER NEW ENGLAND
AS ONE TROF EXITS OFFSHORE AND ANOTHER ENTERS THE GREAT LAKES.

SUNDAY/SUNDAY NIGHT...
IMPRESSIVE HEIGHT FALLS OVER NEW ENGLAND AHEAD OF APPROACHING
FALL-LIKE TROF. STRONG JET DYNAMICS WITH THE GEFS SUGGESTING
INCREASING LOW LEVEL SOUTHERLY JET SOUTH OF NEW ENGLAND ON THE ORDER
OF +2 STD COMBINED WITH PWATS OF +1 TO +2 STD (APPROACHING 2
INCHES!) AND A STRONG CYCLONICALLY CURVED UPPER LEVEL JET DIVING
INTO THE NORTHEAST FROM THE GREAT LAKES.  AT THE SURFACE A STRONG
RESPONSE WITH ONE OR MORE FRONTAL WAVES FORMING ON THE APPROACHING
COLD FRONT AS IT MOVES ACROSS NEW ENGLAND SUN NIGHT. ALL OF THIS
POINTS TO LARGE QG FORCING WITH COPIOUS MOISTURE AND MARGINAL TO
PERHAPS MODEST INSTABILITY TO RELEASE HEAVY SHOWERS/STRONG TSTMS
WITH LOCALLY HEAVY RAINFALL THREAT. DEPENDING ON HOW MUCH SURFACE
HEATING OCCURS BEFORE CLOUD SHIELD ARRIVES SUNDAY POTENTIAL FOR
STRONG TO DAMAGING STORMS POSSIBLE GIVEN STRONG WIND FIELDS ALOFT.
APPEARS AS A HIGH SHEAR/LOW CAPE ENVIRONMENT SO KEY FOR
STRONG/SEVERE TSTMS WILL BE DEGREE OF SURFACE HEATING.

QUITE MUGGY SUNDAY WITH STRONG SOUTHERLY FLOW OFF THE OCEAN PUSHING
DEW PTS INTO THE 65-70 DEG RANGE.

MONDAY...
FRONT SHOULD BE EXITING EASTERN MA EARLY IN THE DAY FOLLOWED BY
IMPRESSIVE COOL AIR ADVECTION FOR LATE AUG WITH +7C 850 MB TEMPS
OVER NORTHERN PORTIONS OF NY AND NEW ENGLAND ADVECTING SOUTHEAST.
PROBABLY A DRY AFTERNOON AS MODELS INDICATE STRONG SUBSIDENCE ACROSS
THE REGION VIA MID LEVEL Q-VECTOR DIVERGENCE. HOWEVER LAPSE RATES
MAY BE FAIRLY STEEP GIVEN COLD POOL ALOFT SO MAY BE ABLE TO POP AN
ISOLATED AFTN SHOWER/TSTM BENEATH THE MID LEVEL SUBSIDENCE
INVERSION.  HIGHEST PROB OF AN AFTERNOON SHOWER/TSTM WOULD BE OVER
NORTHERN MA INTO SOUTHERN NH. MUCH LESS HUMID THAN SUNDAY WITH DEW
PTS FALLING INTO THE 50S.

TUESDAY...
MEAN MID LEVEL TROF OVER THE NORTHEAST AND SOUTHEAST CANADA BUT MEAN
TROF AXIS IS EAST OF THE REGION...SO MAINLY DRY WEATHER SHOULD
PREVAIL. ALTHOUGH WITH CYCLONIC FLOW ALOFT AND COLD POOL CAN/T RULE
OUT AN ISOLATED AFTN/EVENING SHOWER/TSTM.  SEASONABLE TEMPERATURES
EXPECTED WITH MILD DAYS AND COOL NIGHTS.

WEDNESDAY/THURSDAY...
ECENS AND GEFS BOTH INDICATE LONG WAVE TROF KICKS OUT INTO THE
MARITIMES YIELDING HEIGHT RISES ACROSS NEW ENGLAND. THIS SUPPORTS
WARMER AND MORE HUMID WEATHER INTO THE AREA.

&&

.AVIATION /18Z FRIDAY THROUGH WEDNESDAY/...
FORECASTER CONFIDENCE LEVELS...
  LOW...LESS THAN 30 PERCENT
  MODERATE...30 PERCENT TO 60 PERCENT
  HIGH...GREATER THAN 60 PERCENT

THIS AFTERNOON...HIGH CONFIDENCE IN TAFS WITH MAINLY VFR CONDITIONS
CONTINUING.  HOWEVER...ISOLATED TO SCATTERED SHOWERS AND
THUNDERSTORMS WILL CONTINUE TO DEVELOP THIS AFTERNOON AND EVENING.
SINCE THE ACTIVITY WILL BE HIT AND MISS DID NOT INCLUDE IN MOST OF
THE TAFS...BUT WILL AMEND WHEN CONFIDENCE INCREASES FOR A SPECIFIC
TERMINAL.  WHERE SHOWERS/THUNDERSTORMS OCCUR CONDITIONS WILL
TEMPORARILY LOWER TO MVFR-IFR.

TONIGHT...MEDIUM CONFIDENCE IN TAFS.  MOST OF THE ISOLATED TO
SCATTERED SHOWERS/THUNDERSTORMS WILL DIMINISH THIS EVENING.
OTHERWISE VFR CONDITIONS WILL DOMINATE...BUT PATCHES OF MVFR-IFR
CONDITIONS MAY DEVELOP LATE IN LOW CLOUDS/FOG PATCHES.

SATURDAY...MEDIUM TO HIGH CONFIDENCE IN TAFS.  ANY PATCHY MVFR-IFR
CONDITIONS WILL IMPROVE TO MAINLY VFR BY LATE MORNING/EARLY
AFTERNOON.  A FEW SPOT SHOWERS/THUNDERSTORMS ARE POSSIBLE SATURDAY
AFTERNOON/EVENING BUT AREAL COVERAGE SHOULD BE LESS THAN TODAY.

KBOS TERMINAL...HIGH CONFIDENCE IN MAINLY VFR CONDITIONS.  A
SHOWER/THUNDERSTORM OR TWO MAY MOVE ACROSS THE TERMINAL THIS
AFTERNOON AND/OR EVENING BUT THEY WILL BE HIT AND MISS.
OTHERWISE...VFR CONDITIONS WILL CONTINUE INTO SATURDAY.  SOUTHWEST
WINDS SHOULD CONTINUE TODAY AND TONIGHT...BUT EAST TO SOUTHEAST SEA
BREEZES ARE EXPECTED TO DEVELOP BY LATE SATURDAY MORNING/EARLY
AFTERNOON.

OUTLOOK...SUNDAY THROUGH TUESDAY...

SUN/SUN NIGHT...MODERATE TO HIGH CONFIDENCE FOR VFR TO LOWER TO
MVFR/IFR AS SHOWERS AND TSTMS BECOME WIDESPREAD DURING THE AFTERNOON
AND NIGHT. HEAVY RAIN LIKELY ALONG WITH POTENTIAL STRONG WINDS.

MONDAY...COLD FRONT EXITS EARLY WITH A WIND SHIFT FROM SW TO WNW AND
IMPROVING WEATHER AND VSBY. VFR LIKELY DURING THE AFTN.

TUESDAY...MODERATE TO HIGH CONFIDENCE FOR VFR CONDITIONS.

&&

.MARINE...
WINDS AND SEAS ARE EXPECTED TO REMAIN BELOW SCA THRESHOLDS THROUGH
SATURDAY. WIDELY SCATTERED THUNDERSTORMS ARE POSSIBLE MAINLY NEAR
SHORE THIS AFTERNOON/EVENING AND THEN AGAIN SATURDAY AFTERNOON AND
EVENING. THE ONLY OTHER CONCERN WILL BE FOR AREAS OF LATE
NIGHT/MORNING FOG ACROSS THE WATERS.

OUTLOOK...SATURDAY NIGHT THROUGH TUESDAY...

SAT NIGHT...TRANQUIL BOATING WEATHER WITH WEAK HIGH PRES OVER THE
AREA. ANY LINGERING SHOWERS/TSTMS FROM SAT AFTN SHOULD DISSIPATE
FAIRLY QUICK WITH SUNSET.

SUN/SUN NIGHT...A PERIOD OF ROUGH WEATHER WITH WIDESPREAD HEAVY
SHOWERS AND TSTMS LIKELY. SSW WINDS 20-30 KT LIKELY.

MON...IMPROVING WEATHER AS A COLD FRONT MOVES ACROSS THE WATERS
EARLY WITH A WIND SHIFT FROM SSW TO WNW. SEAS WILL REMAIN ROUGH
EARLY ON THE OCEAN WATERS.

TUE...QUIET WEATHER WITH WEAK HIGH PRES OVER THE AREA. LEFTOVER S
SWELLS ON THE SOUTHERN WATERS SHOULD ERODE SLOWLY.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...NONE.
MA...NONE.
NH...NONE.
RI...NONE.
MARINE...NONE.

&&

SYNOPSIS...WTB/NOCERA
NEAR TERM...FRANK
SHORT TERM...WTB
LONG TERM...NOCERA
AVIATION...FRANK/WTB/NOCERA
MARINE...WTB/NOCERA

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAUNTON MA
903 AM EDT FRI AUG 19 2011

CTZ002>004-MAZ002>024-026-NHZ011-012-015-RIZ001>008-201315-
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-CHESHIRE NH-EASTERN HILLSBOROUGH NH-
WESTERN AND CENTRAL HILLSBOROUGH NH-NORTHWEST PROVIDENCE RI-
SOUTHEAST PROVIDENCE RI-WESTERN KENT RI-EASTERN KENT RI-BRISTOL RI-
WASHINGTON RI-NEWPORT RI-BLOCK ISLAND RI-
903 AM EDT FRI AUG 19 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHERN
CONNECTICUT...CENTRAL MASSACHUSETTS...EASTERN
MASSACHUSETTS...NORTHEASTERN MASSACHUSETTS...SOUTHEASTERN
MASSACHUSETTS...WESTERN MASSACHUSETTS...SOUTHERN NEW
HAMPSHIRE...NORTHERN RHODE ISLAND AND SOUTHERN RHODE ISLAND.

.DAY ONE...TODAY AND TONIGHT.

AN ISOLATED STRONG TO SEVERE THUNDERSTORM OR TWO WITH HAIL IS
POSSIBLE THIS AFTERNOON AND/OR EARLY THIS EVENING. IN
ADDITION...ANY STORM THAT DEVELOPS WILL MOVE SLOW AND MAY RESULT
IN VERY ISOLATED AND LOCALIZED FLOODING.

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

A FEW STRONG TO SEVERE THUNDERSTORMS ARE POSSIBLE SUNDAY
AFTERNOON AND EVENING OR MONDAY AFTERNOON. THERE IS CONSIDERABLE
UNCERTAINTY IN THE TIMING OF ANY STRONG THUNDERSTORMS LATE IN THE
WEEKEND OR EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.

ANZ230>237-250-251-254>256-201315-
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-
903 AM EDT FRI AUG 19 2011

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

.DAY ONE...TODAY AND TONIGHT.

AN ISOLATED STRONG TO SEVERE THUNDERSTORM OR TWO WITH LARGE HAIL
IS POSSIBLE NEAR SHORE THIS AFTERNOON AND/OR EARLY EVENING.

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

A FEW STRONG THUNDERSTORMS ARE POSSIBLE SOMETIME SUNDAY AFTERNOON
INTO MONDAY...BUT CONFIDENCE AND TIMING REMAINS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
210 PM EDT FRI AUG 19 2011

MAZ012-RIZ001-191900-
NORTHWEST PROVIDENCE RI-SOUTHERN WORCESTER MA-
210 PM EDT FRI AUG 19 2011

AT 209 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZED HAIL AND GUSTY
WINDS UP TO 40 MPH 2 MILES WEST OF MILLVILLE...OR ABOUT 7 MILES WEST
OF WOONSOCKET...MOVING NORTHEAST AT 5 MPH.

* SOME LOCATIONS AFFECTED INCLUDE...MILLVILLE...UXBRIDGE...MENDON AND
  HOPEDALE.

FOR YOUR SAFETY...GET INSIDE WHEN THESE STORMS APPROACH. THESE STORMS
MAY STRENGTHEN AND COULD PRODUCE DAMAGING WINDS OR LARGE HAIL. STAY
TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA FOR POSSIBLE
WARNINGS.

HEAVY RAIN MAY CAUSE MINOR STREET FLOODING AND PONDING OF WATER IN
LOW LYING AREAS SUCH AS UNDERPASSES. DO NOT DRIVE THROUGH FLOODED
ROADS.

&&

LAT...LON 4201 7167 4215 7164 4212 7149 4210 7150
      4210 7149 4207 7150 4204 7156 4201 7161

SIPPRELL

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
233 PM EDT FRI AUG 19 2011

MAZ004-191915-
NORTHERN WORCESTER MA-
233 PM EDT FRI AUG 19 2011

AT 230 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZED HAIL 2 MILES
SOUTHWEST OF HOLDEN...OR ABOUT 5 MILES NORTHWEST OF WORCESTER...
MOVING NORTHEAST AT 5 MPH.

* SOME LOCATIONS AFFECTED INCLUDE...HOLDEN...WEST BOYLSTON AND
  PRINCETON.

FOR YOUR SAFETY...GET INSIDE WHEN THESE STORMS APPROACH. THESE STORMS
MAY STRENGTHEN AND COULD PRODUCE DAMAGING WINDS OR LARGE HAIL. STAY
TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA FOR POSSIBLE
WARNINGS.

HEAVY RAIN MAY CAUSE MINOR STREET FLOODING AND PONDING OF WATER IN
LOW LYING AREAS SUCH AS UNDERPASSES. DO NOT DRIVE THROUGH FLOODED
ROADS.

&&

LAT...LON 4244 7194 4248 7192 4240 7169 4234 7178
      4231 7186 4233 7194

SIPPRELL

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
241 PM EDT FRI AUG 19 2011

MAZ013>016-191915-
EASTERN NORFOLK MA-SOUTHEAST MIDDLESEX MA-SUFFOLK MA-WESTERN NORFOLK
MA-
241 PM EDT FRI AUG 19 2011

...STRONG THUNDERSTORM FORMING NEAR WALPOLE...

AT 240 PM EDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM
CAPABLE OF PRODUCING WIND GUSTS TO 40 MPH AND PENNY SIZED HAIL
NEAR WALPOLE...MOVING NORTHEAST AT 30 MPH. THIS STORM WILL CROSS THE
SOUTHERN SUBURBS OF BOSTON THROUGH 315 PM.

* SOME LOCATIONS AFFECTED INCLUDE...NORWOOD...WESTWOOD...DEDHAM...
  MILTON...WEST ROXBURY...HYDE PARK...MATTAPAN...ROSLINDALE...
  DORCHESTER...FOREST HILLS AND JAMAICA PLAIN.

HEAVY RAIN MAY CAUSE MINOR STREET FLOODING AND PONDING OF WATER IN
LOW LYING AREAS SUCH AS UNDERPASSES. DO NOT DRIVE THROUGH FLOODED
ROADS.

&&

LAT...LON 4234 7119 4229 7104 4209 7123 4211 7131

JWD

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
257 PM EDT FRI AUG 19 2011

MAZ002-191945-
WESTERN FRANKLIN MA-
257 PM EDT FRI AUG 19 2011

AT 252 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZED HAIL AND GUSTY
WINDS UP TO 40 MPH OVER CHARLEMONT...OR ABOUT 13 MILES WEST OF
GREENFIELD...MOVING NORTHWEST AT 5 MPH.

* SOME LOCATIONS AFFECTED INCLUDE...CHARLEMONT...HEATH...ROWE AND
  MONROE.

FOR YOUR SAFETY...GET INSIDE WHEN THIS STORM APPROACHES. WINDS MAY BE
STRONG ENOUGH TO BRING DOWN SMALL BRANCHES. IN ADDITION...A FLASH
FLOOD WARNING IS IN EFFECT FOR THIS AREA. FLASH FLOODING OF SMALL
STREAMS AND URBAN AREAS IS OCCURRING OR IMMINENT.

&&

LAT...LON 4274 7302 4275 7294 4274 7263 4273 7262
      4259 7268 4258 7287 4264 7296 4266 7296
      4267 7299 4270 7296 4270 7302 4274 7303

SIPPRELL

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE TAUNTON MA
302 PM EDT FRI AUG 19 2011

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

0240 PM     TSTM WND DMG     HOPEDALE                42.13N  71.54W
08/19/2011                   WORCESTER          MA   AMATEUR RADIO

            LARGE BRANCHES DOWN ON DUTCHER STREET

0240 PM     HAIL             HOLDEN                  42.35N  71.85W
08/19/2011  E0.75 INCH       WORCESTER          MA   AMATEUR RADIO

&&

123

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
307 PM EDT FRI AUG 19 2011

MAZ004-012-192000-
NORTHERN WORCESTER MA-SOUTHERN WORCESTER MA-
307 PM EDT FRI AUG 19 2011

AT 305 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZED HAIL...WITH
GUSTY WINDS OF UP TO 40 MPH...3 MILES WEST OF WORCESTER...MOVING
NORTHEAST AT 10 MPH.

* SOME LOCATIONS AFFECTED INCLUDE...WORCESTER...HOLDEN...
  SHREWSBURY...WEST BOYLSTON...STERLING...PRINCETON...CLINTON...
  BOYLSTON AND BERLIN.

FOR YOUR SAFETY...GET INSIDE WHEN THESE STORMS APPROACH. THESE STORMS
MAY STRENGTHEN AND COULD PRODUCE DAMAGING WINDS OR LARGE HAIL. STAY
TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA FOR POSSIBLE
WARNINGS.

HEAVY RAIN MAY CAUSE MINOR STREET FLOODING AND PONDING OF WATER IN
LOW LYING AREAS SUCH AS UNDERPASSES. DO NOT DRIVE THROUGH FLOODED
ROADS.

&&

LAT...LON 4240 7193 4251 7186 4242 7159 4227 7171
      4225 7186 4227 7191

SIPPRELL