Alert archive / Massachusetts / Winter Weather Advisories in 2009

Winter Weather Advisory 21, NWS Boston/Norton, MA

December 20, 20094 counties in Massachusetts

NWS Boston/Norton, MA issued this winter weather advisory at Dec 20, 2009, 4:02 AM EST for 4 counties in Massachusetts. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued
Dec 20, 2009, 4:02 AM EST (09:02 UTC)
Expired
Dec 20, 2009, 12:00 PM EST
In force
8 hr
Issued by
NWS Boston/Norton, MA

Counties Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Worcester County, MA

The radar

The Boston radar (KBOX), 93 km from the middle of the area, began a volume at 09:05 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Albany, NY (KALY), launched 00:00Z, 9.0 hours before the alert went out and 144 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Albany, NY at 00:00Z on 2009-12-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 00:00Z on 2009-12-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 59 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2647 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
59 m²/s²
0-3 km storm-relative helicity
64 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS41 KBOX 200902
WSWBOX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE TAUNTON MA
402 AM EST SUN DEC 20 2009

...HEAVY SNOW ACROSS SOUTHEAST NEW ENGLAND WILL TAPER OFF WEST TO
EAST DURING MID TO LATE MORNING...

MAZ004-010-011-026-201715-
/O.CAN.KBOX.WS.W.0009.000000T0000Z-091220T1700Z/
/O.NEW.KBOX.WW.Y.0021.091220T0902Z-091220T1800Z/
NORTHERN WORCESTER MA-EASTERN HAMPSHIRE MA-EASTERN HAMPDEN MA-
NORTHERN MIDDLESEX MA-
INCLUDING THE CITIES OF...BARRE...FITCHBURG...AMHERST...
NORTHAMPTON...SPRINGFIELD...AYER
402 AM EST SUN DEC 20 2009

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON...
...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON. THE WINTER STORM WARNING HAS BEEN CANCELLED.

THIS WINTER WEATHER ADVISORY IS IN EFFECT FOR WEST CENTRAL AND NORTH
CENTRAL MASSACHUSETTS. 

WEST CENTRAL AND NORTH CENTRAL MASSACHUSETTS WILL BE ON THE NORTHWEST
FRINGE OF A POWERFUL WINTER STORM PASSING SOUTHEAST OF NANTUCKET THIS
MORNING. SNOW WILL ACCUMULATE 3 TO 5 INCHES ACROSS THE EAST SIDE OF
THE PIONEER VALLEY IN WEST CENTRAL MASSACHUSETTS AND ACROSS NORTHERN
WORCESTER COUNTY...MAINLY ALONG AND EAST OF INTERSTATE 190. THE SNOW
WILL TAPER OFF TO FLURRIES AROUND MID MORNING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY IS ISSUED WHEN SNOW IS FORECAST TO DEVELOP
IN THE AFFECTED AREAS...BUT ACCUMULATIONS ARE EXPECTED TO BE LIGHT.
ANY SNOW OR ICE WOULD MAKE DRIVING AND WALKING DIFFICULT...BUT NOT
IMPOSSIBLE...ON UNTREATED ROADWAYS AND SIDEWALKS. WHEN TEMPERATURES
ARE BELOW FREEZING...MOTORISTS NEED TO BE ESPECIALLY CAREFUL ON
BRIDGES AND OVERPASSES WHERE SLIPPERY SPOTS CAN EASILY DEVELOP.

&&

$$

MAZ009-201015-
/O.CAN.KBOX.WS.W.0009.000000T0000Z-091220T1700Z/
WESTERN HAMPDEN MA-
INCLUDING THE CITY OF...BLANDFORD
402 AM EST SUN DEC 20 2009

...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS CANCELLED THE WINTER
STORM WARNING FOR WESTERN HAMPDEN COUNTY.

THE POWERFUL WINTER STORM PASSING SOUTHEAST OF NANTUCKET THIS MORNING
WILL BE FAR ENOUGH EAST TO KEEP THE HEAVIER SNOW EAST OF THE
CONNECTICUT RIVER VALLEY. A LIGHT ACCUMULATION OF ONE TO THREE INCHES
WILL LIKELY FALL IN THIS AREA BEFORE ENDING LATER THIS MORNING.

$$

MAZ002-003-008-NHZ011-012-015-201015-
/O.CAN.KBOX.WW.Y.0020.000000T0000Z-091220T1800Z/
WESTERN FRANKLIN MA-EASTERN FRANKLIN MA-WESTERN HAMPSHIRE MA-
CHESHIRE NH-EASTERN HILLSBOROUGH NH-
WESTERN AND CENTRAL HILLSBOROUGH NH-
INCLUDING THE CITIES OF...CHARLEMONT...GREENFIELD...ORANGE...
CHESTERFIELD...JAFFREY...KEENE...MANCHESTER...NASHUA...
PETERBOROUGH...WEARE
402 AM EST SUN DEC 20 2009

...WINTER WEATHER ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS CANCELLED THE WINTER
WEATHER ADVISORY. 

SATELLITE AND RADAR IMAGERY INDICATE THAT THE HEAVIER SNOW WILL
REMAIN SOUTH AND EAST OF SOUTHWEST NEW HAMPSHIRE. EVEN SO...ONE TO
THREE INCHES OF LIGHT FLUFFY SNOW MAY ACCUMULATE ACROSS SOUTHWEST NEW
HAMPSHIRE BEFORE ENDING LATE THIS MORNING.

$$

MAZ017>024-RIZ002-004>008-201715-
/O.CON.KBOX.BZ.W.0001.000000T0000Z-091220T1800Z/
NORTHERN BRISTOL MA-WESTERN PLYMOUTH MA-EASTERN PLYMOUTH MA-
SOUTHERN BRISTOL MA-SOUTHERN PLYMOUTH MA-BARNSTABLE MA-DUKES MA-
NANTUCKET MA-SOUTHEAST PROVIDENCE RI-EASTERN KENT RI-BRISTOL RI-
WASHINGTON RI-NEWPORT RI-BLOCK ISLAND RI-
INCLUDING THE CITIES OF...TAUNTON...BROCKTON...PLYMOUTH...
FALL RIVER...NEW BEDFORD...MATTAPOISETT...CHATHAM...FALMOUTH...
PROVINCETOWN...VINEYARD HAVEN...NANTUCKET...PROVIDENCE...
WARWICK...BRISTOL...NARRAGANSETT...WESTERLY...NEWPORT...
BLOCK ISLAND
402 AM EST SUN DEC 20 2009

...BLIZZARD WARNING REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON...

A BLIZZARD WARNING REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON. 

THIS BLIZZARD WARNING IS FOR CENTRAL AND SOUTHERN RHODE ISLAND...
SOUTHEAST MASSACHUSETTS INCLUDING THE CAPE AND ISLANDS.

SNOW WILL FALL HEAVY AT TIMES WITH RATES OF 1 TO 2 INCHES PER HOUR
DURING THE EARLY MORNING. DAMAGING WIND GUSTS BETWEEN 50 AND 60 MPH
ACROSS THE CAPE AND ISLANDS AS WELL AS ALONG THE PLYMOUTH COUNTY EAST
COAST WILL PRODUCE BLIZZARD CONDITIONS DUE TO THE COMBINATION OF
HEAVY SNOW AND BLOWING SNOW. ACROSS INTERIOR SOUTHEAST MASSACHUSETTS
AND INTERIOR RHODE ISLAND...WIND GUSTS TO AROUND 40 MPH WILL ALSO
PRODUCE NEAR WHITEOUT CONDITIONS AT TIMES. ISOLATED THUNDER SNOW
COULD RESULT IN BRIEF ISOLATED SNOWFALL RATES BETWEEN 2 AND 3 INCHES
PER HOUR UNTIL DAYBREAK. THE WETTER SNOW ACROSS THE CAPE AND ISLANDS
MAY CAUSE ADDITIONAL SCATTERED POWER OUTAGES THROUGH THE EARLY MORNING.

THE SNOW WILL BEGIN TO LESSEN IN INTENSITY FROM WEST TO EAST BY
AROUND MID MORNING. 

STORM TOTAL SNOWFALL AMOUNTS OF 12 TO 16 INCHES ARE FORECAST ACROSS
ALL OF RHODE ISLAND...SOUTHEAST MASSACHUSETTS...AND THE UPPER CAPE.
NEAR 10 INCHES IS FORECAST FOR MARTHAS VINEYARD AND THE OUTER CAPE. ON
NANTUCKET...A WETTER SNOW WILL REDUCE SNOW TOTALS TO BETWEEN 6 AND 10 INCHES.

LIGHT SNOW MAY LINGER ACROSS CAPE COD...MARTHAS VINEYARD AND
NANTUCKET THROUGH EARLY AFTERNOON.

TRAVEL WILL REMAIN DANGEROUS AND IS NOT RECOMMENDED THROUGH THE MORNING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BLIZZARD WARNING IS ISSUED WHEN SUSTAINED WINDS OR FREQUENT
GUSTS OVER 35 MPH ARE EXPECTED ALONG WITH CONSIDERABLE FALLING
AND/OR BLOWING AND DRIFTING SNOW REDUCING VISIBILITIES TO BELOW
ONE QUARTER MILE FOR AT LEAST THREE CONSECUTIVE HOURS. WHITEOUT
CONDITIONS ARE EXPECTED. THOSE VENTURING OUTDOORS MAY BECOME LOST
OR DISORIENTED...SO PERSONS IN THE WARNING AREA ARE ADVISED TO
STAY INDOORS. ALSO...BE SURE TO CHECK ALL EXTERNAL VENTS ON YOUR
HOUSE BECAUSE THEY CAN LEAD TO A CARBON MONOXIDE RISK IF BLOCKED
BY SNOW DRIFTS.

&&

$$

CTZ002>004-MAZ005>007-012>016-RIZ001-003-201700-
/O.CON.KBOX.WS.W.0009.000000T0000Z-091220T1700Z/
HARTFORD CT-TOLLAND CT-WINDHAM CT-CENTRAL MIDDLESEX MA-
WESTERN ESSEX MA-EASTERN ESSEX MA-SOUTHERN WORCESTER MA-
WESTERN NORFOLK MA-SOUTHEAST MIDDLESEX MA-SUFFOLK MA-
EASTERN NORFOLK MA-NORTHWEST PROVIDENCE RI-WESTERN KENT RI-
INCLUDING THE CITIES OF...HARTFORD...WINDSOR LOCKS...UNION...
VERNON...PUTNAM...WILLIMANTIC...FRAMINGHAM...LOWELL...LAWRENCE...
GLOUCESTER...MILFORD...WORCESTER...FOXBORO...NORWOOD...
CAMBRIDGE...BOSTON...QUINCY...FOSTER...SMITHFIELD...
WEST GREENWICH
402 AM EST SUN DEC 20 2009

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON EST TODAY...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON EST TODAY FOR
NORTHERN CONNECTICUT...NORTHERN RHODE ISLAND...SOUTH CENTRAL
MASSACHUSETTS AND EASTERN MASSACHUSETTS. 

SNOW HEAVY AT TIMES AND WIND GUSTS BETWEEN 30 AND 40 MPH WILL CAUSE
NEAR BLIZZARD CONDITIONS AT TIMES THROUGH THE EARLY
MORNING...ESPECIALLY ACROSS RHODE ISLAND AND EAST COASTAL
MASSACHUSETTS. 

STORM TOTAL SNOWFALL AMOUNTS ARE EXPECTED TO BE 8 TO 15 INCHES IN THE
WINTER STORM WARNING AREA...HEAVIEST ACROSS NORTHEAST CONNECTICUT AND
RHODE ISLAND AND ALONG THE INTERSTATE 95 CORRIDOR SOUTHWEST OF BOSTON.

THE HEAVIEST SNOW WILL PULL AWAY BY MID MORNING...ALTHOUGH OCCASIONAL
LIGHT TO MODERATE SNOW MAY LINGER ACROSS EASTERN MASSACHUSETTS TO
MIDDAY. 

TRAVEL WILL BE TREACHEROUS THROUGH MOST OF THIS MORNING...BUT SHOULD
IMPROVE THIS AFTERNOON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING IS ISSUED WHEN AN AVERAGE OF 6 OR MORE
INCHES OF SNOW IS EXPECTED IN A 12 HOUR PERIOD...OR FOR 8 OR MORE
INCHES IN A 24 HOUR PERIOD. TRAVEL WILL BE SLOW AT BEST ON WELL
TREATED SURFACES...AND QUITE DIFFICULT ON ANY UNPLOWED OR
UNTREATED SURFACES.

&&

$$

THOMPSON
2 follow-up statements
000 
WWUS41 KBOX 201308
WSWBOX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE TAUNTON MA
808 AM EST SUN DEC 20 2009

...HEAVY SNOW ACROSS SOUTHEAST NEW ENGLAND WILL TAPER OFF WEST TO
EAST DURING MID TO LATE MORNING...

MAZ017>024-RIZ002-004>008-201800-
/O.CON.KBOX.BZ.W.0001.000000T0000Z-091220T1800Z/
NORTHERN BRISTOL MA-WESTERN PLYMOUTH MA-EASTERN PLYMOUTH MA-
SOUTHERN BRISTOL MA-SOUTHERN PLYMOUTH MA-BARNSTABLE MA-DUKES MA-
NANTUCKET MA-SOUTHEAST PROVIDENCE RI-EASTERN KENT RI-BRISTOL RI-
WASHINGTON RI-NEWPORT RI-BLOCK ISLAND RI-
INCLUDING THE CITIES OF...TAUNTON...BROCKTON...PLYMOUTH...
FALL RIVER...NEW BEDFORD...MATTAPOISETT...CHATHAM...FALMOUTH...
PROVINCETOWN...VINEYARD HAVEN...NANTUCKET...PROVIDENCE...
WARWICK...BRISTOL...NARRAGANSETT...WESTERLY...NEWPORT...
BLOCK ISLAND
808 AM EST SUN DEC 20 2009

...BLIZZARD WARNING REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON...

A BLIZZARD WARNING REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON. 

THIS BLIZZARD WARNING IS FOR CENTRAL AND SOUTHERN RHODE ISLAND...
SOUTHEAST MASSACHUSETTS INCLUDING THE CAPE AND ISLANDS.

SNOW WILL CONTINUE TO FALL HEAVY AT TIMES WITH RATES OF AN INCH PER
HOUR UNTIL MID MORNING. THE SNOW COMBINED WITH WIND GUSTS BETWEEN 40
AND 45 MPH WILL CAUSE MUCH BLOWING AND DRIFTING SNOW WITH VISIBILITIES
OCCASIONALLY BELOW A QUARTER OF A MILE. TRAVEL WILL REMAIN DANGEROUS
THROUGH MID MORNING.

THE SNOW WILL BEGIN TO LESSEN IN INTENSITY FROM WEST TO EAST AFTER 10
AM BUT NOT LIKELY TO QUIT ENTIRELY UNTIL MIDDAY OR EARLY AFTERNOON.

STORM TOTAL SNOWFALL AMOUNTS OF 12 TO 16 INCHES ARE EXPECTED ACROSS
ALL OF RHODE ISLAND...SOUTHEAST MASSACHUSETTS...AND CAPE COD. NEAR
10 INCHES IS FORECAST FOR MARTHAS VINEYARD. ON NANTUCKET...A WETTER
SNOW WILL REDUCE SNOW TOTALS TO BETWEEN 6 AND 10 INCHES.

LIGHT SNOW MAY LINGER ACROSS CAPE COD...MARTHAS VINEYARD AND
NANTUCKET THROUGH EARLY OR MID AFTERNOON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BLIZZARD WARNING IS ISSUED WHEN SUSTAINED WINDS OR FREQUENT
GUSTS OVER 35 MPH ARE EXPECTED ALONG WITH CONSIDERABLE FALLING
AND/OR BLOWING AND DRIFTING SNOW REDUCING VISIBILITIES TO BELOW
ONE QUARTER MILE FOR AT LEAST THREE CONSECUTIVE HOURS. WHITEOUT
CONDITIONS ARE EXPECTED. THOSE VENTURING OUTDOORS MAY BECOME LOST
OR DISORIENTED...SO PERSONS IN THE WARNING AREA ARE ADVISED TO
STAY INDOORS. ALSO...BE SURE TO CHECK ALL EXTERNAL VENTS ON YOUR
HOUSE BECAUSE THEY CAN LEAD TO A CARBON MONOXIDE RISK IF BLOCKED
BY SNOW DRIFTS.

&&

$$

CTZ002>004-MAZ005>007-012>016-RIZ001-003-201700-
/O.CON.KBOX.WS.W.0009.000000T0000Z-091220T1700Z/
HARTFORD CT-TOLLAND CT-WINDHAM CT-CENTRAL MIDDLESEX MA-
WESTERN ESSEX MA-EASTERN ESSEX MA-SOUTHERN WORCESTER MA-
WESTERN NORFOLK MA-SOUTHEAST MIDDLESEX MA-SUFFOLK MA-
EASTERN NORFOLK MA-NORTHWEST PROVIDENCE RI-WESTERN KENT RI-
INCLUDING THE CITIES OF...HARTFORD...WINDSOR LOCKS...UNION...
VERNON...PUTNAM...WILLIMANTIC...FRAMINGHAM...LOWELL...LAWRENCE...
GLOUCESTER...MILFORD...WORCESTER...FOXBORO...NORWOOD...
CAMBRIDGE...BOSTON...QUINCY...FOSTER...SMITHFIELD...
WEST GREENWICH
808 AM EST SUN DEC 20 2009

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON EST TODAY...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON EST TODAY. 

SNOW WILL CONTINUE TO FALL HEAVY AT TIMES ACROSS NORTHEAST
CONNECTICUT...NORTHERN RHODE ISLAND...AND MASSACHUSETTS EAST OF
WORCESTER UNTIL ABOUT 10 AM...AND THEN DIMINISH IN INTENSITY. THE
SNOW WILL TAPER OFF TO FLURRIES BY 11 AM ACROSS NORTHERN
CONNECTICUT...NORTHERN RHODE ISLAND AND SOUTH CENTRAL WORCESTER
COUNTY. ACROSS EASTERN MASSACHUSETTS...THE SNOW SHOULD TAPER OFF TO
FLURRIES BETWEEN NOON AND 1 PM.

STORM TOTAL SNOWFALL AMOUNTS ARE EXPECTED TO BE 8 TO 15 INCHES IN
THE WINTER STORM WARNING AREA...HEAVIEST ACROSS NORTHEAST
CONNECTICUT...RHODE ISLAND...SOUTHEAST WORCESTER COUNTY AND ALONG THE
INTERSTATE 95 CORRIDOR SOUTHWEST OF BOSTON. GUSTY NORTH WINDS WILL
CREATE BLOWING AND DRIFTING SNOW THROUGH THE MORNING.

TRAVEL WILL BE HAZARDOUS THROUGH MOST OF THIS MORNING...BUT SHOULD
IMPROVE THIS AFTERNOON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING IS ISSUED WHEN AN AVERAGE OF 6 OR MORE
INCHES OF SNOW IS EXPECTED IN A 12 HOUR PERIOD...OR FOR 8 OR MORE
INCHES IN A 24 HOUR PERIOD. TRAVEL WILL BE SLOW AT BEST ON WELL
TREATED SURFACES...AND QUITE DIFFICULT ON ANY UNPLOWED OR
UNTREATED SURFACES.

&&

$$

MAZ004-010-011-026-201800-
/O.CON.KBOX.WW.Y.0021.000000T0000Z-091220T1800Z/
NORTHERN WORCESTER MA-EASTERN HAMPSHIRE MA-EASTERN HAMPDEN MA-
NORTHERN MIDDLESEX MA-
INCLUDING THE CITIES OF...BARRE...FITCHBURG...AMHERST...
NORTHAMPTON...SPRINGFIELD...AYER
808 AM EST SUN DEC 20 2009

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON...

A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON. 

THIS WINTER WEATHER ADVISORY IS IN EFFECT FOR WEST CENTRAL AND
NORTH CENTRAL MASSACHUSETTS.

SNOW WILL ACCUMULATE 3 TO 5 INCHES ACROSS THE EAST SIDE OF THE
PIONEER VALLEY IN WEST CENTRAL MASSACHUSETTS AND ACROSS PORTIONS OF NORTHERN
WORCESTER COUNTY...MAINLY ALONG AND EAST OF INTERSTATE 190. THE SNOW
WILL TAPER OFF TO FLURRIES AROUND OR SHORTLY AFTER 10 AM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY IS ISSUED WHEN SNOW IS FORECAST TO
DEVELOP IN THE AFFECTED AREAS...BUT ACCUMULATIONS ARE EXPECTED TO
BE LIGHT. ANY SNOW OR ICE WOULD MAKE DRIVING AND WALKING
DIFFICULT...BUT NOT IMPOSSIBLE...ON UNTREATED ROADWAYS AND
SIDEWALKS. WHEN TEMPERATURES ARE BELOW FREEZING...MOTORISTS NEED
TO BE ESPECIALLY CAREFUL ON BRIDGES AND OVERPASSES WHERE SLIPPERY
SPOTS CAN EASILY DEVELOP.

&&

$$

THOMPSON
000 
WWUS41 KBOX 201538
WSWBOX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE TAUNTON MA
1038 AM EST SUN DEC 20 2009

...HEAVY SNOW ACROSS SOUTHEAST NEW ENGLAND WILL TAPER OFF WEST TO
EAST DURING MID TO LATE MORNING...

MAZ017>021-RIZ002-004>008-201700-
/O.CAN.KBOX.BZ.W.0001.000000T0000Z-091220T1800Z/
/O.EXA.KBOX.WS.W.0009.000000T0000Z-091220T1700Z/
NORTHERN BRISTOL MA-WESTERN PLYMOUTH MA-EASTERN PLYMOUTH MA-
SOUTHERN BRISTOL MA-SOUTHERN PLYMOUTH MA-SOUTHEAST PROVIDENCE RI-
EASTERN KENT RI-BRISTOL RI-WASHINGTON RI-NEWPORT RI-
BLOCK ISLAND RI-
INCLUDING THE CITIES OF...TAUNTON...BROCKTON...PLYMOUTH...
FALL RIVER...NEW BEDFORD...MATTAPOISETT...PROVIDENCE...WARWICK...
BRISTOL...NARRAGANSETT...WESTERLY...NEWPORT...BLOCK ISLAND
1038 AM EST SUN DEC 20 2009

...WINTER STORM WARNING IN EFFECT UNTIL NOON EST TODAY...
...BLIZZARD WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS CONVERTED THE BLIZZARD
WARNING TO A WINTER STORM WARNING...WHICH IS IN EFFECT UNTIL NOON EST
TODAY. 

THIS WINTER STORM WARNING IS FOR CENTRAL AND SOUTHERN RHODE
ISLAND...AND SOUTHEAST MASSACHUSETTS.

THE HEAVIEST SNOW HAS ENDED...BUT LIGHT TO OCCASIONAL MODERATE SNOW
WILL PERSIST INTO EARLY OR MID AFTERNOON BEFORE ENDING. ADDITIONAL
SNOW ACCUMULATION OF 1 TO 3 INCHES IS EXPECTED.

THE FALLING SNOW COMBINED WITH WIND GUSTS TO 30 MPH WILL CONTINUE TO
PRODUCE BLOWING AND DRIFTING SNOW WILL REDUCE VISIBILITY AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING IS ISSUED WHEN AN AVERAGE OF 6 OR MORE INCHES
OF SNOW IS EXPECTED IN A 12 HOUR PERIOD...OR FOR 8 OR MORE INCHES IN
A 24 HOUR PERIOD. TRAVEL WILL BE SLOW AT BEST ON WELL TREATED
SURFACES...AND QUITE DIFFICULT ON ANY UNPLOWED OR UNTREATED SURFACES.

&&

$$

CTZ002-003-201645-
/O.CAN.KBOX.WS.W.0009.000000T0000Z-091220T1700Z/
HARTFORD CT-TOLLAND CT-
INCLUDING THE CITIES OF...HARTFORD...WINDSOR LOCKS...UNION...
VERNON
1038 AM EST SUN DEC 20 2009

...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS CANCELLED THE WINTER
STORM WARNING. 

OCCASIONAL LIGHT SNOW OR FLURRIES WILL END AROUND MIDDAY.

$$

MAZ010-011-201645-
/O.CAN.KBOX.WW.Y.0021.000000T0000Z-091220T1800Z/
EASTERN HAMPSHIRE MA-EASTERN HAMPDEN MA-
INCLUDING THE CITIES OF...AMHERST...NORTHAMPTON...SPRINGFIELD
1038 AM EST SUN DEC 20 2009

...WINTER WEATHER ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS CANCELLED THE WINTER
WEATHER ADVISORY. 

$$

MAZ022>024-201800-
/O.CON.KBOX.BZ.W.0001.000000T0000Z-091220T1800Z/
BARNSTABLE MA-DUKES MA-NANTUCKET MA-
INCLUDING THE CITIES OF...CHATHAM...FALMOUTH...PROVINCETOWN...
VINEYARD HAVEN...NANTUCKET
1038 AM EST SUN DEC 20 2009

...BLIZZARD WARNING REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON...

A BLIZZARD WARNING REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON. 

THIS BLIZZARD WARNING IS FOR THE CAPE AND ISLANDS.

SNOW WILL BE HEAVY AT TIMES UNTIL EARLY AFTERNOON...THEN GRADUALLY
DIMINISH IN INTENSITY. HOWEVER...LIGHT TO OCCASIONAL MODERATE SNOW
WILL LIKELY CONTINUE FOR MOST OF THE AFTERNOON...ESPECIALLY OVER THE
OUTER CAPE.

THE SNOW COMBINED WITH WIND GUSTS TO 40 MPH WILL CAUSE MUCH BLOWING
AND DRIFTING SNOW WITH VISIBILITIES OCCASIONALLY BELOW A QUARTER OF
A MILE. THE WINDS WILL GRADUALLY DIMINISH DURING THE AFTERNOON.
TRAVEL WILL REMAIN DANGEROUS.

ADDITIONAL SNOW ACCUMULATION OF 2 TO 4 INCHES IS EXPECTED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BLIZZARD WARNING IS ISSUED WHEN SUSTAINED WINDS OR FREQUENT
GUSTS OVER 35 MPH ARE EXPECTED ALONG WITH CONSIDERABLE FALLING
AND/OR BLOWING AND DRIFTING SNOW REDUCING VISIBILITIES TO BELOW
ONE QUARTER MILE FOR AT LEAST THREE CONSECUTIVE HOURS. WHITEOUT
CONDITIONS ARE EXPECTED. THOSE VENTURING OUTDOORS MAY BECOME LOST
OR DISORIENTED...SO PERSONS IN THE WARNING AREA ARE ADVISED TO
STAY INDOORS. ALSO...BE SURE TO CHECK ALL EXTERNAL VENTS ON YOUR
HOUSE BECAUSE THEY CAN LEAD TO A CARBON MONOXIDE RISK IF BLOCKED
BY SNOW DRIFTS.

&&

$$

CTZ004-MAZ005>007-012>016-RIZ001-003-201700-
/O.CON.KBOX.WS.W.0009.000000T0000Z-091220T1700Z/
WINDHAM CT-CENTRAL MIDDLESEX MA-WESTERN ESSEX MA-EASTERN ESSEX MA-
SOUTHERN WORCESTER MA-WESTERN NORFOLK MA-SOUTHEAST MIDDLESEX MA-
SUFFOLK MA-EASTERN NORFOLK MA-NORTHWEST PROVIDENCE RI-
WESTERN KENT RI-
INCLUDING THE CITIES OF...PUTNAM...WILLIMANTIC...FRAMINGHAM...
LOWELL...LAWRENCE...GLOUCESTER...MILFORD...WORCESTER...FOXBORO...
NORWOOD...CAMBRIDGE...BOSTON...QUINCY...FOSTER...SMITHFIELD...
WEST GREENWICH
1038 AM EST SUN DEC 20 2009

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON EST TODAY...

A WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON EST TODAY. 

THE HEAVIEST SNOW HAS ENDED...BUT LIGHT TO OCCASIONAL MODERATE SNOW
WILL PERSIST INTO EARLY OR MID AFTERNOON BEFORE ENDING. ADDITIONAL
SNOW ACCUMULATION OF 1 TO 3 INCHES IS EXPECTED.

THE FALLING SNOW COMBINED WITH WIND GUSTS TO 30 MPH WILL CONTINUE TO
PRODUCE BLOWING AND DRIFTING SNOW WILL REDUCE VISIBILITY AT TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING IS ISSUED WHEN AN AVERAGE OF 6 OR MORE
INCHES OF SNOW IS EXPECTED IN A 12 HOUR PERIOD...OR FOR 8 OR MORE
INCHES IN A 24 HOUR PERIOD. TRAVEL WILL BE SLOW AT BEST ON WELL
TREATED SURFACES...AND QUITE DIFFICULT ON ANY UNPLOWED OR
UNTREATED SURFACES.

&&

$$

MAZ004-026-201700-
/O.EXT.KBOX.WW.Y.0021.000000T0000Z-091220T1700Z/
NORTHERN WORCESTER MA-NORTHERN MIDDLESEX MA-
INCLUDING THE CITIES OF...BARRE...FITCHBURG...AYER
1038 AM EST SUN DEC 20 2009

...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL NOON EST TODAY...

THE WINTER WEATHER ADVISORY IS NOW IN EFFECT UNTIL NOON EST
TODAY. 

THIS WINTER WEATHER ADVISORY IS IN EFFECT FOR WEST CENTRAL AND
NORTH CENTRAL MASSACHUSETTS.

LIGHT TO OCCASIONAL MODERATE SNOW WILL GRADUALLY TAPER OFF TO
FLURRIES BEFORE ENDING AROUND MID AFTERNOON. ADDITIONAL SNOW
ACCUMULATION OF 1 TO 2 INCHES IS POSSIBLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY IS ISSUED WHEN SNOW IS FORECAST TO
DEVELOP IN THE AFFECTED AREAS...BUT ACCUMULATIONS ARE EXPECTED TO
BE LIGHT. ANY SNOW OR ICE WOULD MAKE DRIVING AND WALKING
DIFFICULT...BUT NOT IMPOSSIBLE...ON UNTREATED ROADWAYS AND
SIDEWALKS. WHEN TEMPERATURES ARE BELOW FREEZING...MOTORISTS NEED
TO BE ESPECIALLY CAREFUL ON BRIDGES AND OVERPASSES WHERE SLIPPERY
SPOTS CAN EASILY DEVELOP.

&&

$$

What forecasters said that day

The local office's own words before this winter weather advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Boston/Norton, MA wrote its last area forecast discussion before this winter weather advisory went out at Dec 20, 2:41 AM EST, 1 hour 21 minutes earlier.

Area forecast discussion, Dec 20, 2:41 AM EST, 1 hour 21 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAUNTON MA
241 AM EST SUN DEC 20 2009

.SYNOPSIS...
A POWERFUL COASTAL STORM WILL BRING HEAVY SNOW WITH NEAR BLIZZARD
CONDITIONS TO PORTIONS OF THE COAST TONIGHT AND SUNDAY MORNING.
UNSEASONABLY COLD WEATHER WILL CONTINUE FOR THE FIRST HALF OF THE
WORK WEEK. LOW PRESSURE AND A COLD FRONT WILL APPROACH FROM THE
SOUTH AND WEST CHRISTMAS DAY.

&&

.NEAR TERM /UNTIL 6 AM THIS MORNING/...
WILL HAVE A MORE IN DEPTH DISCUSSION OUT IN ABOUT AN HOUR AND HALF.
WE WILL BE LOWERING SNOWFALL TOTALS CONSIDERABLY ACROSS FAR WESTERN
MA AND PARTS OF SOUTHWEST NH.  WE ARE STARTING TO SEE BETTER RETURNS
SO STILL THINK IT WILL EVENTUALLY SNOW...BUT THERE IS JUST SUCH A
SHARP CUT OFF.  THE DRY AIR HAS REALLY EATEN INTO SNOW ACCUMULATIONS
ACROSS THE REGION.  WILL BE CANCELING THE WINTER WEATHER ADVISORY
FOR CHESHIRE AS WELL AS PARTS OF FAR WESTERN AND NORTHWEST MA.  THIS
AREA MAY STILL SEE 1 TO 3 INCHES OF SNOW...BUT WERE NOT EVEN SURE OF
THAT.

THE REST OF THE FORECAST IS ON TRACK AND NO OTHER CHANGES WILL BE
MADE. MUCH MORE LATER.  WE HOPE TO HAVE THE UPDATE WINTER WEATHER
STATEMENTS SHORTLY.

&&

.SHORT TERM /6 AM THIS MORNING THROUGH 6 PM MONDAY/...
TONIGHT...
MODELS ACTUALLY IN GOOD AGREEMENT REGARDING STORM TRACK JUST SOUTH
OF THE BENCHMARK EARLY SUN BUT THERE ARE INTENSITY DIFFERENCES WHICH
AFFECT THE WIND FORECAST...AND ALSO THERE IS STILL UNCERTAINTY WITH
HOW FAR NW THE HEAVY SNOW WILL EXTEND.

GFS NOT AS INTENSE AS NAM/ECMWF/RGEM BUT WE OPTED FOR MORE INTENSE
SOLUTION GIVEN THE IMPRESSIVE HEIGHT FALLS...GREATER THAN 200 M
00-12Z...THAT MOVE OVER THE OCEAN AMD IMPRESSIVE TROPOPAUSE FOLD
NOTED IN 1.5 PVU SURFACE.  CONSENSUS ALSO FAVORS MORE INTENSE
SOLUTION WITH LOW 970S STORM PASSING JUST SOUTH OF BENCHMARK AROUND
12Z SUN.

BLIZZARD WARNINGS IN EFFECT FROM PVD-TAN SOUTHWARD TO CAPE/ISLANDS
WITH WINTER STORM WARNINGS TO THE NORTH...AND EXISTING WATCHES
CONVERTED TO ADVISORY FOR NW MA AND SW NH.

SNOW RAMPS UP THIS EVENING...WITH THE WORST OF THIS STORM LIKELY
OCCURRING IN A 6-8 HOUR WINDOW OVERNIGHT AND EARLY SUN AS STORM
BOMBS OUT SOUTH OF ACK.  HOWEVER...WE MAY HAVE SOME BL ISSUES FROM
ACK-CQX WHERE THERE MAY BE SOME RAIN/SNOW MIX FOR A TIME THIS
EVENING.  WET BULB TEMPS AND SOUNDINGS SHOW POTENTIAL FOR RA/SNOW
MIX THROUGH 06Z BUT ONCE STRONG OMEGA MOVES IN EXPECT ANY MIXED
PRECIP TO BECOME ALL SNOW AFTER MIDNIGHT.  THIS MAY CUT DOWN ON SNOW
ACCUM IN THIS REGION.

HEAVIEST SNOW WILL ALSO COINCIDE WITH STRONGEST WINDS.  NAM BUFKIT
INDICATING POTENTIAL FOR G50-60 KT OVER OUTER CAPE/ACK WITH G40 KT
PVD-TAN.  GFS IS WEAKER BUT STILL 50 KT POTENTIAL FOR ACK.  ZERO
VISIBILITY A GOOD BET FOR A TIME AFTER MIDNIGHT.  CONTEMPLATED
BLIZZARD FOR BOS BUT JUST NOT SURE ABOUT MEETING WIND CRITERIA FOR 3
CONSECUTIVE HOURS.  IT/S CLOSE BUT WILL LET LATER SHIFTS MAKE FINAL
CALL.

CLASSIC SET UP FOR HEAVY SNOW IN THE COASTAL PLAIN WITH FAVORABLE
STORM TRACK...STRONG OMEGA IN THE SNOWGROWTH REGION AND GOOD BANDING
SIGNAL ON NORTHERN AND WESTERN PERIPHERY OF 700 MB LOW.  FGEN/-EPV
SIGNAL IS VERY IMPRESSIVE WITH BEST MID LEVEL FGEN FROM THE I95
CORRIDOR SOUTH AND EAST TO CAPE COD.  THIS IS LIKELY THE REGION
WHERE MAX SNOW ACCUM WILL OCCUR AND THIS HAS STRONG SUPPORT FROM ALL
GEFS MEMBERS WHICH TARGET RI AND SE MA.  HOWEVER...STILL HAVE TO
WATCH FOR POSSIBLE SECONDARY BAND FURTHER WEST ACROSS CT AS NAM
SUGGESTS...BUT NOT SEEING THIS ON OTHER MODELS. MAX SNOWFALL RATES
2-3 POSSIBLE OVERNIGHT IN HEAVIEST BANDS.

THERE IS ALSO CHC FOR THUNDER ACROSS RI/SE MA AS IMPRESSIVE MID
LEVEL LAPSE RATES GREATER THAN 7 C/KM DEVELOP LATE TONIGHT AND CROSS
SECTIONS INDICATE MORE CI VS CSI.  ALREADY SEEING LIGHTNING ACROSS
SOUTHERN NJ.

GREATER UNCERTAINTY FURTHER NORTH...ESPECIALLY NW MA AND SW NH DUE
TO PRESENCE OF LOW LEVEL DRY AIR WHICH WILL PROBABLY RESULT IN SHARP
NORTHERN GRADIENT TO THE SNOW SHIELD.  NAM/GFS HAVE UP TO 0.5 QPF
ACROSS NW ZONES BUT EC/GGEM MUCH LESS AND GIVEN LOW LEVEL DRYING
NOTED IN THE CROSS SECTIONS OPTED FOR MORE CONSERVATIVE SOLUTION AND
WILL CONVERT WATCHES TO AN ADVSY.  AND IT/S POSSIBLE IT MAY FALL
SHORT OF ADVSY ACROSS NORTHERN CHESHIRE AND HILLSBOROUGH.

SUNDAY...
HEAVIEST SNOWFALL SHOULD BEGIN TO MOVE OUT AFTER MID
MORNING...EARLIER WEST.  BUT WE EXPECT STEADY LIGHT TO OCNLY MOD
SNOW TO PERSIST INTO EARLY AFTERNOON ACROSS EASTERN NEW ENG AS MOIST
COLD CONVEYOR BELT WRAPS AROUND WESTERN PERIPHERY OF MID LEVEL LOW.
NAM/GFS SHOW WEAK OMEGA IN SNOW GROWTH REGION PERSISTING THROUGH 18Z
WITH MODEST QG LIFT AND DEEP MOISTURE THROUGH 700 MB.  THIS SUGGESTS
THE SNOW WILL CONTINUE WITH ADDITIONAL LIGHT ACCUM.

STRONG WINDS CONTINUE INTO THE MORNING THEN GRADUALLY DIMINISH
DURING AFTERNOON.

HIGH PROBABILITY OF AT LEAST A FOOT ACROSS PORTIONS OF RI AND SE MA
WHERE JACKPOT SHOULD BE.  ALL GEFS MEMBERS HAVE 1+ TOTAL QPF IN
THIS REGION AS DO GFS/NAM/SREF.  RGEM IS DISPLACED A LITTLE FURTHER
SOUTH WITH QPF AXIS.  USED A NAM/GFS/SREF/HPC BLEND ON QPF WITH 12:1
RATIO TO DERIVE SNOW AMOUNTS.  THIS GIVES MAX OF 12-16 NE CT/RI/SE
MA...UP TO A FOOT HFD COUNTY TO MASS PIKE REGION...WITH AMOUNTS
DROPPING OFF TO THE NORTH.

&&

.LONG TERM /MONDAY NIGHT THROUGH SATURDAY/...
SUNDAY NIGHT...LEFTOVER WRAP AROUND SNOW SHOWERS POSSIBLE FROM THE
DEPARTING COASTAL LOW OVER THE CAPE AND ISLANDS DURING THE EARLY
EVENING HOURS. OTHERWISE BRISK AND COLD WITH CLEARING SKIES AS WEAK
H5 RIDGING AND NW FLOW PROVIDE INCREASING SUBSIDENCE.

MONDAY...WEAK H5 RIDGING PREVAILS WITH NEUTRAL THERMAL ADVECTION.
USED A BLEND OF GMOS/MET GUIDANCE WHICH YIELDS HIGHS NEAR 30 INLAND
AND LOWER TO MID 30S ELSEWHERE.

TUESDAY...POLAR VORTEX CROSSES THE AREA DURING THE AFTERNOON HOURS
WITH LITTLE MOISTURE BUT LOW LEVEL LAPSE RATES WILL STEEPEN IN THE
AFTERNOON.  WILL SEE SOME INCREASING CLOUDS LATER IN THE DAY WITH
PERHAPS A FEW SNOW SHOWERS OR FLURRIES ESPECIALLY ACROSS THE HIGH
TERRAIN.

WEDNESDAY...POLAR VORTEX MERGES WITH THE OLD OFFSHORE LOW ALLOWING
WRAP AROUND MOISTURE FROM THE COLD CONVEYOR BELT TO EXTEND INTO
EASTERN NEW ENGLAND. HAVE CHANCE POPS ADVERTISED ACROSS THE EAST
WEDNESDAY AFTERNOON AND WEDNESDAY NIGHT. BOUNDARY LAYER TEMPERATURES
MAY BE JUST WARM ENOUGH TO SUPPORT RAIN MIXING IN ALONG THE SOUTHEAST
COAST. OTHERWISE SCATTERED SNOW SHOWERS POSSIBLE.

THURSDAY...SCATTERED EARLY MORNING SNOW SHOWERS POSSIBLE CAPE AND
ISLANDS. OTHERWISE SURFACE HIGH PRESSURE AND H5 RIDGING WILL ALLOW
FOR DRY CONDITIONS. HOWEVER MOIST NORTHEAST FLOW COULD CAUSE LOW
CLOUDS TO REMAIN STUBBORN ACROSS THE CAPE AND ISLANDS. TEMPERATURES
REMAIN SLIGHTLY COLDER THAN SEASONAL NORMS.

FRIDAY THROUGH SATURDAY...FAIRLY POTENT SOUTHERN STREAM ENERGY
APPROACHES THE OHIO VALLEY BY EARLY FRIDAY. LONG RANGE MODELS AND
THE ENSEMBLE MEMBERS ARE IN DISAGREEMENT REGARDING HOW DEEP THE MEAN
TROUGH AXIS WILL DEVELOP ACROSS THE CENTRAL UNITED STATES AND WHEN
THE PHASING OCCURS. MOST OF THE OPERATIONAL MODELS INDICATE DOMINANT
PRIMARY LOW PRESSURE TRACKING ACROSS THE GREAT LAKES WHICH WOULD
PUSH A COLD FRONT ACROSS THE AREA DURING SATURDAY. THIS WOULD RESULT
IN THE FORECAST AREA EVENTUALLY RESIDING WITHIN THE WARM SECTOR.
HOWEVER TELECONNECTIONS INDICATE THE NAO REMAINING NEGATIVE AND THIS
WOULD FAVOR STRONGER SECONDARY LOW DEVELOPMENT ALONG THE MID
ATLANTIC COAST BY SATURDAY. THIS WOULD KEEP COLDER AIR LOCKED IN A
BIT LONGER ACROSS THE REGION. IN ANY CASE THERE IS GOOD AGREEMENT
THAT THE NEXT SIGNIFICANT PRECIPITATION EVENT WILL LIKELY OCCUR
SOMETIME DURING THIS TIMEFRAME....PROBABLY LATER FRIDAY INTO
SATURDAY. SHOULD SEE MIXED PRECIPITATION...CHANGING TO RAIN ALONG
THE COAST...PERHAPS AN EXTENDED PERIOD OF SLEET AND FREEZING RAIN
ACROSS THE FAR INTERIOR. GIVEN THE TIMING UNCERTAINTY HAVE
ADVERTISED NOTHING HIGHER THAN HIGH CHANCE POPS AT THIS TIME.

&&

.AVIATION /08Z SUNDAY THROUGH THURSDAY/...
ALONG AND NW OF A MHT-FIT-BAF LINE...MVFR CONDITIONS DUE TO CIGS AND VSBYS
IN LIGHT SNOW THRU 15Z AND THEN BECOMING VFR.
ELSWHERE...WIDESPREAD LIFR CONDITIONS IN HEAVY SNOW AND BLOWING SNOW
TO 12Z WITH NNE WIND GUSTS 40 TO 45 KT NEAR RI COAST AND E MA BOS-
PYM-HYA...AND TO 50 KT HYA-ACK. REMAINING MOSTLY IFR IN SNOW AND
BLOWING SNOW TO ABOUT 15Z. AFT 15Z...IMPROVING TO VFR WEST TO EAST. N
TO NW WIND GUSTS 35 TO 40 KT UNTIL 21Z ACROSS EASTERN MA...THEN
GRADUALLY DIMINISHING. BLOWING AND DRIFTING SNOW MAY IMPACT CENTRAL
AND EASTERN MA...RI AND NE CT RUNWAYS UNTIL 21Z.
TONIGHT...VFR EXCEPT POSSIBLY LINGERING MVFR CIGS ACROSS CAPE COD AND
NANTUCKET UNTIL 03Z. NW WINDS GUSTING TO 25 KT DURING EVENING AND
THEN GRADUALLY DIMINISHING LATE.

OUTLOOK...MONDAY THROUGH WEDNESDAY...

MONDAY AND TUESDAY...VFR.

TUESDAY NIGHT THROUGH THURSDAY...MAINLY VFR WITH GUSTY NW WINDS
THROUGH THE PERIOD. CHANCE OF MVFR CONDITIONS WED/THU FOR
BOS/HYA/ACK/FMH AS LOW PRESSURE LINGERING OFF THE COAST MAY SWING A
PERIOD OF SNOW SHOWERS THROUGH THE AREA.

&&

.MARINE...
EXPANDED THE STORM WARNING TO INCLUDE VINEYARD SOUND SO WE NOW HAVE
STORMS FOR CAPE COD BAY AND ACK/VINEYARD SOUND AS WELL AS OUTER
WATERS TO THE SOUTH AND EAST OF CAPE/ISLANDS.  STRONG GALES
ELSEWHERE.  POTENTIAL FOR G55 KT LATE TONIGHT AND EARLY SUN OVER
OUTER WATERS SOUTH AND EAST OF ACK AS STORM BOMBS OUT TO THE SOUTH.
G45 KT ELSEWHERE OVER OPEN WATERS.  SEAS MAY APPROACH 25 FEET ACROSS
THE EASTERN OUTER-WATERS.  MARINERS ARE URGED TO RETURN TO PORT AS
THIS WILL BE A VERY DANGEROUS STORM.

WINDS WILL BEGIN TO DIMINISH BY MIDDAY SUNDAY BUT GALES WILL PERSIST
OVER OUTER EASTERN WATERS.

OUTLOOK /SUNDAY NIGHT THROUGH WEDNESDAY/...
GALES LINGERING EASTERN WATERS SUNDAY EVENING...OTHERWISE NORTH/NORTHWEST
WINDS OF SMALL CRAFT LEVELS ARE EXPECTED THROUGH MUCH OF THE PERIOD
WITH SEAS REMAINING UP.

&&

.TIDES/COASTAL FLOODING...
ASTRONOMICAL HIGH TIDES OCCUR GENERALLY BETWEEN MIDNIGHT AND 4 AM
ACROSS THE COAST.  FORTUNATELY...THE ASTRONOMICAL TIDE IS QUITE LOW
AND HIGH TIDE NOT COINCIDING WITH WORST OF THE SEAS.
NONETHELESS...STRONG NORTH TO NORTHEAST WINDS MAY RESULT IN AREAS OF
BEACH EROSION ESPECIALLY ON NORTH AND NORTHEAST FACING BEACHES.
STORM SURGE GUIDANCE IS PROBABLY UNDERDONE AND COULD SEE 2+ FOOT
STORM SURGE ON NORTH AND NORTHEAST FACING BEACHES.  HOWEVER...REALLY
DO NOT SEE MUCH MORE THAN PERHAPS MINOR SPLASH OVER AT THE WORST.
THE BIGGER CONCERN WILL BE BEACH EROSION.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...WINTER STORM WARNING UNTIL NOON EST TODAY FOR CTZ002>004.
MA...BLIZZARD WARNING UNTIL 1 PM EST THIS AFTERNOON FOR MAZ017>024.
     WINTER STORM WARNING UNTIL NOON EST TODAY FOR MAZ004>007-
     012>016-026.
     WINTER WEATHER ADVISORY UNTIL 1 PM EST THIS AFTERNOON FOR
     MAZ010-011.
NH...WINTER WEATHER ADVISORY UNTIL 1 PM EST THIS AFTERNOON FOR
     NHZ012-015.
RI...BLIZZARD WARNING UNTIL 1 PM EST THIS AFTERNOON FOR RIZ002-
     004>008.
     WINTER STORM WARNING UNTIL NOON EST TODAY FOR RIZ001-003.
MARINE...STORM WARNING UNTIL 11 AM EST THIS MORNING FOR ANZ231>233-
     254>256.
     GALE WARNING UNTIL 1 PM EST THIS AFTERNOON FOR ANZ230-234>237.
     GALE WARNING UNTIL 7 PM EST THIS EVENING FOR ANZ250-251.

&&

SYNOPSIS...KJC/STRAUSS
NEAR TERM...FRANK
SHORT TERM...KJC
LONG TERM...STRAUSS
AVIATION...STRAUSS/THOMPSON
MARINE...KJC/STRAUSS
TIDES/COASTAL FLOODING...
Hazardous weather outlook, Dec 19, 4:52 PM EST, 11 hours 10 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAUNTON MA
452 PM EST SAT DEC 19 2009

MAZ017>024-RIZ002-004>008-202200-
NORTHERN BRISTOL MA-WESTERN PLYMOUTH MA-EASTERN PLYMOUTH MA-
SOUTHERN BRISTOL MA-SOUTHERN PLYMOUTH MA-BARNSTABLE MA-DUKES MA-
NANTUCKET MA-SOUTHEAST PROVIDENCE RI-EASTERN KENT RI-BRISTOL RI-
WASHINGTON RI-NEWPORT RI-BLOCK ISLAND RI-
452 PM EST SAT DEC 19 2009

...BLIZZARD WARNING IN EFFECT UNTIL 1 PM EST SUNDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEASTERN
MASSACHUSETTS...NORTHERN RHODE ISLAND AND SOUTHERN RHODE ISLAND.

.DAY ONE...TONIGHT.

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

   BLIZZARD WARNING.

EAST AND NORTHEAST FACING BEACHES MAY SEE BEACH EROSION TONIGHT AND
SUNDAY AS LARGE BREAKERS ARE EXPECTED DUE TO THE STORM. ASTRONOMICAL
TIDES ARE LOW...THEREFORE...SUBSTANTIAL COASTAL FLOODING IS NOT
EXPECTED AS OF NOW.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

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

   BLIZZARD WARNING.

A SIGNIFICANT WINTRY WEATHER EVENT IS POSSIBLE FRIDAY INTO SATURDAY
PARTICULARLY ACROSS THE INTERIOR.

.SPOTTER INFORMATION STATEMENT...

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

CTZ002>004-MAZ004>007-009>016-026-RIZ001-003-202200-
HARTFORD CT-TOLLAND CT-WINDHAM CT-NORTHERN WORCESTER MA-
CENTRAL MIDDLESEX MA-WESTERN ESSEX MA-EASTERN ESSEX 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 MIDDLESEX MA-
NORTHWEST PROVIDENCE RI-WESTERN KENT RI-
452 PM EST SAT DEC 19 2009

...WINTER STORM WARNING IN EFFECT UNTIL NOON EST SUNDAY...

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

.DAY ONE...TONIGHT.

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

   WINTER STORM WARNING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

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

   WINTER STORM WARNING.

A SIGNIFICANT WINTRY WEATHER EVENT IS POSSIBLE FRIDAY INTO SATURDAY
PARTICULARLY ACROSS THE INTERIOR.

.SPOTTER INFORMATION STATEMENT...

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

MAZ002-003-008-NHZ011-012-015-202200-
WESTERN FRANKLIN MA-EASTERN FRANKLIN MA-WESTERN HAMPSHIRE MA-
CHESHIRE NH-EASTERN HILLSBOROUGH NH-
WESTERN AND CENTRAL HILLSBOROUGH NH-
452 PM EST SAT DEC 19 2009

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

THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MASSACHUSETTS AND
SOUTHERN NEW HAMPSHIRE.

.DAY ONE...TONIGHT.

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

   WINTER WEATHER ADVISORY.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

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

   WINTER WEATHER ADVISORY.

A SIGNIFICANT WINTRY WEATHER EVENT IS POSSIBLE FRIDAY INTO SATURDAY.

.SPOTTER INFORMATION STATEMENT...

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

ANZ231>233-254>256-202200-
CAPE COD BAY-NANTUCKET SOUND-VINEYARD SOUND-
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-
452 PM EST SAT DEC 19 2009

...STORM WARNING IN EFFECT FROM 9 PM THIS EVENING TO 11 AM EST
SUNDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MASSACHUSETTS COASTAL WATERS
AND 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.

   STORM WARNING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

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

   STORM WARNING.

.SPOTTER INFORMATION STATEMENT...

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

ANZ234>237-202200-
BUZZARDS BAY-RHODE ISLAND SOUND-NARRAGANSETT BAY-BLOCK ISLAND SOUND-
452 PM EST SAT DEC 19 2009

...GALE WARNING IN EFFECT UNTIL 1 PM EST SUNDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR MASSACHUSETTS COASTAL WATERS
AND 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...SUNDAY THROUGH FRIDAY.

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

   GALE WARNING.

.SPOTTER INFORMATION STATEMENT...

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

ANZ230-202200-
BOSTON HARBOR-
452 PM EST SAT DEC 19 2009

...GALE WARNING IN EFFECT UNTIL 1 PM 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...SUNDAY THROUGH FRIDAY.

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

   GALE WARNING.

.SPOTTER INFORMATION STATEMENT...

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

ANZ250-251-202200-
COASTAL WATERS EAST OF IPSWICH BAY AND THE STELLWAGEN BANK NATIONAL
MARINE SANCTUARY-MASSACHUSETTS BAY AND IPSWICH BAY-
452 PM EST SAT DEC 19 2009

...GALE WARNING IN EFFECT UNTIL 7 PM 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...SUNDAY THROUGH FRIDAY.

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

   GALE WARNING.

.SPOTTER INFORMATION STATEMENT...

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

In the hours before

Special weather statement, Dec 19, 11:35 PM EST, 4 hours 27 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
1135 PM EST SAT DEC 19 2009

MAZ002>004-026-NHZ011-012-015-200845-
WESTERN FRANKLIN MA-EASTERN FRANKLIN MA-NORTHERN WORCESTER MA-
NORTHERN MIDDLESEX MA-CHESHIRE NH-EASTERN HILLSBOROUGH NH-
WESTERN AND CENTRAL HILLSBOROUGH NH-
INCLUDING THE CITIES OF...CHARLEMONT...GREENFIELD...ORANGE...
BARRE...FITCHBURG...AYER...JAFFREY...KEENE...MANCHESTER...
NASHUA...PETERBOROUGH...WEARE
1135 PM EST SAT DEC 19 2009

SNOW WILL MOVE INTO THE ROUTE 2 CORRIDOR SHORTLY AFTER MIDNIGHT AND
THEN SPREAD INTO SOUTHWEST NEW HAMPSHIRE AFTER 1 AM. THE SNOW WILL
FALL MODERATE TO HEAVY AT TIMES SOUTH OF ROUTE 2 TO NEAR INTERSTATE
495 BETWEEN 1 AND 7 AM. THE SNOW WILL FALL LIGHT TO MODERATE ACROSS
SOUTHWEST NEW HAMPSHIRE OVERNIGHT.

MAZ005>007-014-015-200845-
CENTRAL MIDDLESEX MA-WESTERN ESSEX MA-EASTERN ESSEX MA-
SOUTHEAST MIDDLESEX MA-SUFFOLK MA-
INCLUDING THE CITIES OF...FRAMINGHAM...LOWELL...LAWRENCE...
GLOUCESTER...CAMBRIDGE...BOSTON
1135 PM EST SAT DEC 19 2009

SNOW WILL BEGIN IN THE BOSTON AREA AROUND MIDNIGHT AND BECOME HEAVY
QUICKLY. SNOW WILL SPREAD ACROSS THE REST OF NORTHEAST MASSACHUSETTS
BETWEEN MIDNIGHT AND 1 AM. SNOW WILL FALL HEAVY AT TIMES BETWEEN 1 AM
AND 8 AM WITH NEAR BLIZZARD CONDITIONS AT TIMES NEAR THE COAST.

CTZ004-MAZ012-013-016>019-RIZ001>005-200845-
WINDHAM CT-SOUTHERN WORCESTER MA-WESTERN NORFOLK MA-
EASTERN NORFOLK MA-NORTHERN BRISTOL MA-WESTERN PLYMOUTH MA-
EASTERN PLYMOUTH MA-NORTHWEST PROVIDENCE RI-
SOUTHEAST PROVIDENCE RI-WESTERN KENT RI-EASTERN KENT RI-
BRISTOL RI-
INCLUDING THE CITIES OF...PUTNAM...WILLIMANTIC...MILFORD...
WORCESTER...FOXBORO...NORWOOD...QUINCY...TAUNTON...BROCKTON...
PLYMOUTH...FOSTER...SMITHFIELD...PROVIDENCE...WEST GREENWICH...
WARWICK...BRISTOL
1135 PM EST SAT DEC 19 2009

HEAVY SNOW AND BLOWING SNOW WILL RESULT IN BLIZZARD CONDITIONS BETWEEN
1 AM AND 8 AM ACROSS SOUTHEAST MASSACHUSETTS AND RHODE ISLAND. NEAR
BLIZZARD CONDITIONS MAY BE EXPERIENCED AT TIMES OVERNIGHT ACROSS
NORTHEAST CONNECTICUT AND SOUTH CENTRAL MASSACHUSETTS. SNOW WILL
FALL AT A RATE OF 2 TO 3 INCHES PER HOUR AT TIMES...AND TRAVEL WILL
BE VERY DANGEROUS.

MAZ022>024-200845-
BARNSTABLE MA-DUKES MA-NANTUCKET MA-
INCLUDING THE CITIES OF...CHATHAM...FALMOUTH...PROVINCETOWN...
VINEYARD HAVEN...NANTUCKET
1135 PM EST SAT DEC 19 2009

HEAVY SNOW AND BLOWING SNOW FROM WIND GUSTS TO 60 MPH WILL CAUSE
WHITEOUT CONDITIONS OVERNIGHT. IN ADDITION...THE WIND DRIVEN SNOW
WILL BE WET ENOUGH TO CAUSE SCATTERED POWER OUTAGES. TRAVEL WILL BE VERY
DANGEROUS THROUGH 8 AM.

MAZ020-021-RIZ006-007-200845-
SOUTHERN BRISTOL MA-SOUTHERN PLYMOUTH MA-WASHINGTON RI-NEWPORT RI-
INCLUDING THE CITIES OF...FALL RIVER...NEW BEDFORD...
MATTAPOISETT...NARRAGANSETT...WESTERLY...NEWPORT
1135 PM EST SAT DEC 19 2009

HEAVY SNOW AND BLOWING SNOW FROM WIND GUSTS BETWEEN 50 AND 60 MPH
WILL CAUSE WHITEOUT CONDITIONS OVERNIGHT. SNOW WILL ACCUMULATE AT THE
RATE OF 2 TO 3 INCHES PER HOUR AT TIMES. NEAR THE SOUTH COAST...THE
WIND DRIVEN SNOW MAY BE WET ENOUGH TO CAUSE A FEW POWER OUTAGES.
TRAVEL WILL BE VERY DANGEROUS THROUGH 8 AM.

CTZ002-003-MAZ008>011-200845-
HARTFORD CT-TOLLAND CT-WESTERN HAMPSHIRE MA-WESTERN HAMPDEN MA-
EASTERN HAMPSHIRE MA-EASTERN HAMPDEN MA-
INCLUDING THE CITIES OF...HARTFORD...WINDSOR LOCKS...UNION...
VERNON...CHESTERFIELD...BLANDFORD...AMHERST...NORTHAMPTON...
SPRINGFIELD
1135 PM EST SAT DEC 19 2009

SNOW WILL BE HEAVY AT TIMES OVERNIGHT ACROSS NORTHERN CONNECTICUT AND
WEST CENTRAL MASSACHUSETTS. THE SNOW COMBINED WITH GUSTY WINDS WILL
CAUSE POOR VISIBILITY. THE SNOW MAY ACCUMULATE BETWEEN 1 AND 2 INCHES
PER HOUR FOR A TIME IN THE HARTFORD AREA OVERNIGHT.

THOMPSON

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 20, 10:10 AM ESTCoastal Flood AdvisoryBOXBarnstable, Nantucket6 hr
Dec 20, 10:49 AM ESTSmall Craft AdvisoryBOX6 days

Nearby

Winter Weather Advisories in Massachusetts, 2009Every winter weather advisory in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.