Alert archive / Massachusetts / Snow Advisories in 2007

Snow Advisory 5, NWS Boston/Norton, MA

December 20, 2007Hillsborough County, New Hampshire; 4 counties in Massachusetts

NWS Boston/Norton, MA issued this snow advisory at Dec 20, 2007, 7:55 AM EST for Hillsborough County, New Hampshire; 4 counties in Massachusetts. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
Dec 20, 2007, 7:55 AM EST (12:55 UTC)
Expired
Dec 20, 2007, 5:28 PM EST
In force
10 hr
Issued by
NWS Boston/Norton, MA

Counties Middlesex County, MA, Norfolk County, MA, Suffolk County, MA, Worcester County, MA, Hillsborough County, NH

The radar

The Boston radar (KBOX), 61 km from the middle of the area, began a volume at 12:55 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

Chatham, MA (KCHH), launched 12:00Z, 0.9 hours before the alert went out and 150 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, Chatham, MA at 12:00Z on 2007-12-20Temperature 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, Chatham, MA at 12:00Z on 2007-12-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 square meters per square second.19395878Sfc1 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
554 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
22 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 201255
WSWBOX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE TAUNTON MA
755 AM EST THU DEC 20 2007

...OCCASIONALLY HEAVY SNOW WILL MAKE TRAVEL DIFFICULT AT TIMES
ACROSS SOUTHERN NEW HAMPSHIRE INTO THE NORTHEAST QUARTER OF
MASSACHUSETTS TODAY...

.LOW PRESSURE ABOUT 80 MILES EAST OF NANTUCKET AT DAWN WILL
STEADILY INTENSIFY INTO A GALE CENTER AS IT SLOWLY EDGES EAST.
COLD AIR WRAPPING SOUTHWESTWARD FROM MAINE WILL BOOST SNOWFALL RATES
LATER THIS MORNING INTO EARLY THIS AFTERNOON. ACCUMULATING SNOW WILL
ALSO SWEEP SOUTH AND SOUTHWEST OF BOSTON TODAY...POSSIBLY LINGERING
ACROSS SOUTHEAST MASSACHUSETTS PAST MIDNIGHT TONIGHT.

MAZ014-026-NHZ015-201800-
/O.CAN.KBOX.WW.Y.0018.000000T0000Z-071221T0100Z/
/O.NEW.KBOX.SN.Y.0005.071220T1255Z-071221T0100Z/
SOUTHEAST MIDDLESEX MA-NORTHERN MIDDLESEX MA-
WESTERN AND CENTRAL HILLSBOROUGH NH-
INCLUDING THE CITIES OF...CAMBRIDGE...AYER...PETERBOROUGH...WEARE
755 AM EST THU DEC 20 2007

...SNOW ADVISORY IN EFFECT UNTIL 8 PM EST THIS EVENING...
...WINTER WEATHER ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS CONVERTED THE WINTER WEATHER
ADVISORY TO A SNOW ADVISORY FOR PORTIONS OF BOSTONS NORTHWEST SUBURBS
INTO WESTERN HILLSBOROUGH COUNTY. THIS IS IN EFFECT UNTIL 8 PM EST
THIS EVENING. THE WINTER WEATHER ADVISORY HAS BEEN CANCELLED SINCE
THE LIKELIHOOD OF MIXED PRECIPITATION HAS DECREASED.

SNOW WILL COMBINE WITH STEADY OR SLOWLY FALLING TEMPERATURES TO CREATE
VERY HAZARDOUS TRAVEL AT TIMES TODAY. SNOW IS EXPECTED TO BE BRIEFLY
HEAVY AT TIMES BETWEEN NOW AND 1 PM WITH AN HOURLY SNOWFALL RATE OF
AN INCH HOUR POSSIBLE.

ALREADY AS OF 7 AM...TWO TO 4 INCHES OF NEW SNOW HAD FALLEN ACROSS
MUCH OF HILLSBOROUGH COUNTY INTO THE INTERIOR OF MIDDLESEX COUNTY AND
FAR NORTHERN AND WESTERN PARTS OF ESSEX COUNTY.

STORM TOTAL SNOWFALL BY THIS EVENINGS RUSH HOUR WILL BE 4 TO 7 INCHES FROM
WESTERN HILLSBOROUGH COUNTY NEW HAMPSHIRE INTO FAR NORTHWEST MIDDLESEX
COUNTY MASSACHUSETTS AND THE PORTION OF MIDDLESEX COUNTY NEAR AND INSIDE
OF ROUTE 128 NEAR LEXINGTON.

THE SNOW WILL START DIMINISHING LATE THIS AFTERNOON. 

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED
VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

MAZ005>007-NHZ012-201800-
/O.UPG.KBOX.WW.Y.0018.000000T0000Z-071221T0100Z/
/O.NEW.KBOX.HS.W.0003.071220T1255Z-071221T0100Z/
CENTRAL MIDDLESEX MA-WESTERN ESSEX MA-EASTERN ESSEX MA-
EASTERN HILLSBOROUGH NH-
INCLUDING THE CITIES OF...FRAMINGHAM...LOWELL...LAWRENCE...
GLOUCESTER...MANCHESTER...NASHUA
755 AM EST THU DEC 20 2007

...HEAVY SNOW WARNING IN EFFECT UNTIL 8 PM EST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A HEAVY SNOW WARNING...WHICH
IS IN EFFECT UNTIL 8 PM EST THIS EVENING. THIS REPLACES THE WINTER WEATHER
ADVISORY PREVIOUSLY IN EFFECT FOR EASTERN HILLSBOROUGH COUNTY INTO MUCH
OF ESSEX COUNTY IN NORTHEAST MASSACHUSETTS.

SNOW WILL COMBINE WITH STEADY OR SLOWLY FALLING TEMPERATURES TO CREATE
VERY HAZARDOUS TRAVEL AT TIMES TODAY. SNOW IS EXPECTED TO BE HEAVY AT
TIMES BETWEEN NOW AND 1 PM WITH AN HOURLY SNOWFALL RATE OF AN INCH
HOUR POSSIBLE.

AS OF 7 AM...TWO TO 4 INCHES OF NEW SNOW HAD FALLEN ACROSS MUCH OF
HILLSBOROUGH COUNTY INTO INTERIOR MIDDLESEX COUNTY AND FAR NORTHERN
AND WESTERN PARTS OF ESSEX COUNTY.

STORM TOTAL SNOWFALL BY THIS EVENINGS RUSH HOUR IN THE WARNING AREA
ALONG AND EAST OF THE INTERSTATE 93 CORRIDOR FROM JUST NORTH OF
BOSTON TO MANCHESTER NEW HAMPSHIRE SHOULD AVERAGE 5 TO 10 INCHES. 

SNOWFALL WILL BEGIN DIMINISHING LATE THIS AFTERNOON.

A HEAVY SNOW 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.

$$

MAZ004-013-015-201800-
/O.NEW.KBOX.SN.Y.0005.071220T1255Z-071221T0100Z/
NORTHERN WORCESTER MA-WESTERN NORFOLK MA-SUFFOLK MA-
INCLUDING THE CITIES OF...BARRE...FITCHBURG...FOXBORO...NORWOOD...
BOSTON
755 AM EST THU DEC 20 2007

...SNOW ADVISORY IN EFFECT UNTIL 8 PM EST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A SNOW
ADVISORY...WHICH IS IN EFFECT UNTIL 8 PM EST THIS EVENING. 

A SNOW ADVISORY HAS BEEN ISSUED FOR BOSTON AND THE IMMEDIATE
SUBURBS SOUTHWEST OF BOSTON INCLUDING ALL OF NORFOLK COUNTY AND ALL
OF NORTHEAST WORCESTER COUNTY.

THREE TO 6 INCHES OF SNOW OF SNOW IS EXPECTED IN THE WARNING AREA
BEFORE THE SNOW FINALLY TAPERS TO FLURRIES TONIGHT. 

SNOW WILL LIKELY FALL HEAVILY FOR A TIME DURING MIDDAY WITH A
SNOWFALL RATE OF AN INCH AN HOUR EXPECTED.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

DRAG
5 follow-up statements
000 
WWUS41 KBOX 201404 CCA
WSWBOX

URGENT - WINTER WEATHER MESSAGE...CORRECTED
NATIONAL WEATHER SERVICE TAUNTON MA
903 AM EST THU DEC 20 2007

...OCCASIONALLY HEAVY SNOW WILL MAKE TRAVEL DIFFICULT AT TIMES
ACROSS SOUTHERN NEW HAMPSHIRE INTO THE NORTHEAST QUARTER OF
MASSACHUSETTS TODAY...

.LOW PRESSURE ABOUT 80 MILES EAST OF NANTUCKET AT DAWN WILL
STEADILY INTENSIFY INTO A GALE CENTER AS IT SLOWLY EDGES EAST.
COLD AIR WRAPPING SOUTHWESTWARD FROM MAINE WILL BOOST SNOWFALL RATES
LATER THIS MORNING INTO EARLY THIS AFTERNOON. ACCUMULATING SNOW WILL
ALSO SWEEP SOUTH AND SOUTHWEST OF BOSTON TODAY...POSSIBLY LINGERING
ACROSS SOUTHEAST MASSACHUSETTS PAST MIDNIGHT TONIGHT.

MAZ014-026-NHZ015-201930-
/O.CAN.KBOX.WW.Y.0018.000000T0000Z-071221T0100Z/
/O.NEW.KBOX.SN.Y.0005.071220T1403Z-071221T0100Z/
SOUTHEAST MIDDLESEX MA-NORTHERN MIDDLESEX MA-
WESTERN AND CENTRAL HILLSBOROUGH NH-
INCLUDING THE CITIES OF...CAMBRIDGE...AYER...PETERBOROUGH...WEARE
903 AM EST THU DEC 20 2007

...SNOW ADVISORY IN EFFECT UNTIL 8 PM EST THIS EVENING...
...WINTER WEATHER ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS CONVERTED THE WINTER WEATHER
ADVISORY TO A SNOW ADVISORY FOR PORTIONS OF BOSTONS NORTHWEST SUBURBS
INTO WESTERN HILLSBOROUGH COUNTY. THIS IS IN EFFECT UNTIL 8 PM EST
THIS EVENING. THE WINTER WEATHER ADVISORY HAS BEEN CANCELLED SINCE
THE LIKELIHOOD OF MIXED PRECIPITATION HAS DECREASED.

SNOW WILL COMBINE WITH STEADY OR SLOWLY FALLING TEMPERATURES TO CREATE
VERY HAZARDOUS TRAVEL AT TIMES TODAY. SNOW IS EXPECTED TO BE BRIEFLY
HEAVY AT TIMES BETWEEN NOW AND 1 PM WITH AN HOURLY SNOWFALL RATE OF
AN INCH HOUR POSSIBLE.

ALREADY AS OF 7 AM...TWO TO 4 INCHES OF NEW SNOW HAD FALLEN ACROSS
MUCH OF HILLSBOROUGH COUNTY INTO THE INTERIOR OF MIDDLESEX COUNTY AND
FAR NORTHERN AND WESTERN PARTS OF ESSEX COUNTY.

STORM TOTAL SNOWFALL BY THIS EVENINGS RUSH HOUR WILL BE 4 TO 7 INCHES FROM
WESTERN HILLSBOROUGH COUNTY NEW HAMPSHIRE INTO FAR NORTHWEST MIDDLESEX
COUNTY MASSACHUSETTS AND THE PORTION OF MIDDLESEX COUNTY NEAR AND INSIDE
OF ROUTE 128 NEAR LEXINGTON.

THE SNOW WILL START DIMINISHING LATE THIS AFTERNOON. 

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED
VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

MAZ005>007-NHZ012-201930-
/O.UPG.KBOX.WW.Y.0018.000000T0000Z-071221T0100Z/
/O.NEW.KBOX.HS.W.0003.071220T1403Z-071221T0100Z/
CENTRAL MIDDLESEX MA-WESTERN ESSEX MA-EASTERN ESSEX MA-
EASTERN HILLSBOROUGH NH-
INCLUDING THE CITIES OF...FRAMINGHAM...LOWELL...LAWRENCE...
GLOUCESTER...MANCHESTER...NASHUA
903 AM EST THU DEC 20 2007

...HEAVY SNOW WARNING IN EFFECT UNTIL 8 PM EST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A HEAVY SNOW WARNING...WHICH
IS IN EFFECT UNTIL 8 PM EST THIS EVENING. THIS REPLACES THE WINTER WEATHER
ADVISORY PREVIOUSLY IN EFFECT FOR EASTERN HILLSBOROUGH COUNTY INTO MUCH
OF ESSEX COUNTY IN NORTHEAST MASSACHUSETTS.

SNOW WILL COMBINE WITH STEADY OR SLOWLY FALLING TEMPERATURES TO CREATE
VERY HAZARDOUS TRAVEL AT TIMES TODAY. SNOW IS EXPECTED TO BE HEAVY AT
TIMES BETWEEN NOW AND 1 PM WITH AN HOURLY SNOWFALL RATE OF AN INCH
HOUR POSSIBLE.

AS OF 7 AM...TWO TO 4 INCHES OF NEW SNOW HAD FALLEN ACROSS MUCH OF
HILLSBOROUGH COUNTY INTO INTERIOR MIDDLESEX COUNTY AND FAR NORTHERN
AND WESTERN PARTS OF ESSEX COUNTY.

STORM TOTAL SNOWFALL BY THIS EVENINGS RUSH HOUR IN THE WARNING AREA
ALONG AND EAST OF THE INTERSTATE 93 CORRIDOR FROM JUST NORTH OF
BOSTON TO MANCHESTER NEW HAMPSHIRE SHOULD AVERAGE 5 TO 10 INCHES. 

SNOWFALL WILL BEGIN DIMINISHING LATE THIS AFTERNOON.

A HEAVY SNOW 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.

$$

MAZ004-013-015-201930-
/O.COR.KBOX.SN.Y.0005.071220T1403Z-071221T0100Z/
NORTHERN WORCESTER MA-WESTERN NORFOLK MA-SUFFOLK MA-
INCLUDING THE CITIES OF...BARRE...FITCHBURG...FOXBORO...NORWOOD...
BOSTON
903 AM EST THU DEC 20 2007

...SNOW ADVISORY IN EFFECT UNTIL 8 PM EST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A SNOW
ADVISORY...WHICH IS IN EFFECT UNTIL 8 PM EST THIS EVENING. 

A SNOW ADVISORY HAS BEEN ISSUED FOR BOSTON AND THE IMMEDIATE
SUBURBS SOUTHWEST OF BOSTON INCLUDING ALL OF NORFOLK COUNTY AND ALL
OF NORTHEAST WORCESTER COUNTY.

THREE TO 6 INCHES OF SNOW OF SNOW IS EXPECTED IN THE ADVISORY AREA
BEFORE THE SNOW FINALLY TAPERS TO FLURRIES TONIGHT.

SNOW WILL LIKELY FALL HEAVILY FOR A TIME DURING MIDDAY WITH A
SNOWFALL RATE OF AN INCH AN HOUR EXPECTED.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

DRAG
000 
WWUS41 KBOX 201507 AAA
WSWBOX

URGENT - WINTER WEATHER MESSAGE...UPDATED
NATIONAL WEATHER SERVICE TAUNTON MA
1007 AM EST THU DEC 20 2007

...OCCASIONALLY HEAVY SNOW WILL MAKE TRAVEL DIFFICULT AT TIMES
ACROSS SOUTHERN NEW HAMPSHIRE INTO NORTHEAST MASSACHUSETTS FOR THE
REMAINDER OF THE MORNING AND POSSIBLY EARLY THIS AFTERNOON...

.WEAKENING LOW PRESSURE NEAR ALBANY NEW YORK WILL COMBINE WITH
STRENGTHENING LOW PRESSURE WELL EAST OF CAPE COD TO LINGERING
ACCUMULATING SNOWS THROUGH THE REMAINDER OF THE MORNING. ACCUMULATING
SNOW WILL ALSO SWEEP SOUTHWARD DOWN THE EASTERN MASSACHUSETTS
COASTLINE THIS MORNING...THEN POSSIBLY MIXING WITH RAIN MID TO LATE
AFTERNOON AS WINDS SHIFT TO THE NORTHEAST.

MAZ005>007-NHZ012-201815-
/O.CON.KBOX.HS.W.0003.000000T0000Z-071221T0100Z/
CENTRAL MIDDLESEX MA-WESTERN ESSEX MA-EASTERN ESSEX MA-
EASTERN HILLSBOROUGH NH-
INCLUDING THE CITIES OF...FRAMINGHAM...LOWELL...LAWRENCE...
GLOUCESTER...MANCHESTER...NASHUA
1007 AM EST THU DEC 20 2007

...HEAVY SNOW WARNING REMAINS IN EFFECT UNTIL 8 PM EST THIS
EVENING...

A HEAVY SNOW WARNING REMAINS IN EFFECT UNTIL 8 PM EST THIS
EVENING FOR THE CITIES OF...FRAMINGHAM...LOWELL...LAWRENCE...
GLOUCESTER...MANCHESTER...NASHUA AND ADJACENT TOWNS.

SNOW WILL COMBINE WITH STEADY OR SLOWLY FALLING TEMPERATURES TO
CREATE VERY HAZARDOUS TRAVEL AT TIMES THIS MORNING. SNOW IS EXPECTED TO BE
HEAVY AT TIMES BETWEEN UNTIL 11 AM WITH AN HOURLY SNOWFALL RATE OF
AN INCH HOUR POSSIBLE. AFTER 11 AM AND ESPECIALLY THIS AFTERNOON SNOW
INTENSITY WILL DIMINISH WITH LITTLE IF ANY ADDITIONAL SNOW
ACCUMULATIONS. 

AS OF 10 AM...3 TO 6 INCHES OF NEW SNOW HAD FALLEN ACROSS MUCH OF
HILLSBOROUGH COUNTY INTO INTERIOR MIDDLESEX COUNTY AND FAR NORTHERN
AND WESTERN PARTS OF ESSEX COUNTY.

STORM TOTAL SNOWFALL BY MIDDAY WILL RANGE BETWEEN 4 TO 8 INCHES.

AT 10 AM THE BACK EDGE OF THE SNOW WAS ACROSS THE WORCESTER
HILLS...AND WILL MOVE EAST AND SHOULD BE FOCUSED ACROSS EASTERN MASSACHUSETTS
THIS AFTERNOON. THEREFORE...ACCUMULATING SNOW IS EXPECTED TO DIMINISH
THIS AFTERNOON. AS A RESULT THE HEAVY SNOW WARNING MAY BE CANCELED
EARLY IF THIS DIMINISHING TREND CONTINUES.

A HEAVY SNOW 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.

$$

MAZ004-013>015-026-NHZ015-201815-
/O.CON.KBOX.SN.Y.0005.000000T0000Z-071221T0100Z/
NORTHERN WORCESTER MA-WESTERN NORFOLK MA-SOUTHEAST MIDDLESEX MA-
SUFFOLK MA-NORTHERN MIDDLESEX MA-
WESTERN AND CENTRAL HILLSBOROUGH NH-
INCLUDING THE CITIES OF...BARRE...FITCHBURG...FOXBORO...NORWOOD...
CAMBRIDGE...BOSTON...AYER...PETERBOROUGH...WEARE
1007 AM EST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 8 PM EST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 8 PM EST THIS EVENING FOR THE 
CITIES OF...BARRE...FITCHBURG...FOXBORO...NORWOOD...CAMBRIDGE...BOSTON...
AYER...PETERBOROUGH...WEARE AND ADJACENT TOWNS.

SNOW WILL COMBINE WITH STEADY OR SLOWLY FALLING TEMPERATURES TO
CREATE VERY HAZARDOUS TRAVEL AT TIMES FOR THE REMAINDER OF THE MORNING.
SNOW IS EXPECTED TO BE BRIEFLY HEAVY AT TIMES UNTIL EARLY AFTERNOON WITH AN
HOURLY SNOWFALL RATE OF AN INCH HOUR POSSIBLE.

ALREADY AS OF 10 AM...TWO TO 4 INCHES OF NEW SNOW HAD FALLEN ACROSS
THE AREA. ALSO AS OF 10 AM THE BACK EDGE OF THE SNOW WAS ACROSS THE
WORCESTER HILLS AND IS EXPECTED TO MOVE EAST THIS AFTERNOON...WITH
SNOW FOCUSED ACROSS EASTERN MASSACHUSETTS. NORTH WINDS THIS MORNING
WILL BECOME NORTHEAST THIS AFTERNOON...WHICH MAY WARM TEMPERATURES
ABOVE FREEZING RESULTING IN RAIN MIXING WITH SNOW. THIS WOULD LIMIT
ACCUMULATIONS AND LESSEN THE IMPACT TO AREA ROADWAYS. 

STORM TOTAL SNOWFALL BY THIS EVENINGS RUSH HOUR WILL BE 2 TO 5 INCHES...
WITH HIGHEST AMOUNTS AWAY FROM THE COAST. 

SNOW WILL START DIMINISHING LATE THIS AFTERNOON AND IF THIS OCCURS
EARLIER THE SNOW ADVISORY WILL BE DISCONTINUED.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

NOCERA
000 
WWUS41 KBOX 201712 AAA
WSWBOX

URGENT - WINTER WEATHER MESSAGE...UPDATED
NATIONAL WEATHER SERVICE TAUNTON MA
1212 PM EST THU DEC 20 2007

...ACCUMULATING SNOW THIS AFTERNOON WILL BE CONFINED TO THE GREATER
BOSTON AREA EXTENDING NORTHEAST INTO ESSEX COUNTY...RESULTING IN
HAZARDOUS TRAVEL INTO THE LATE DAY COMMUTE...


MAZ005-202000-
/O.CAN.KBOX.HS.W.0003.000000T0000Z-071221T0100Z/
/O.EXA.KBOX.SN.Y.0005.000000T0000Z-071221T0100Z/
CENTRAL MIDDLESEX MA-
INCLUDING THE CITIES OF...FRAMINGHAM...LOWELL
1212 PM EST THU DEC 20 2007

...SNOW ADVISORY IN EFFECT UNTIL 8 PM EST THIS EVENING...
...HEAVY SNOW WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS DOWNGRADED THE HEAVY SNOW
WARNING TO A SNOW ADVISORY FOR CENTRAL MIDDLESEX COUNTY WHICH
INCLUDES THE CITIES OF FRAMINGHAM AND LOWELL. THE SNOW ADVISORY IS IN
EFFECT UNTIL 8 PM EST THIS EVENING. 

AT NOON ACCUMULATING SNOW HAS SHIFTED EAST INTO EASTERN MASSACHUSETTS...
MAINLY EAST OF INTERSTATE 495 WITH THE HEAVIEST SNOW INSIDE OF ROUTE
128. THIS EASTWARD TREND WILL CONTINUE THIS AFTERNOON.
THEREFORE...ONLY AN ADDITIONAL INCH OR TWO OF SNOW ACCUMULATION IS
EXPECTED THIS AFTERNOON ACROSS THE AREA. LIGHT SNOW WILL TAPER OFF TO
FLURRIES THIS EVENING.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

NHZ012-201815-
/O.CAN.KBOX.HS.W.0003.000000T0000Z-071221T0100Z/
EASTERN HILLSBOROUGH NH-
INCLUDING THE CITIES OF...MANCHESTER...NASHUA
1212 PM EST THU DEC 20 2007

...HEAVY SNOW WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS CANCELED THE HEAVY
SNOW WARNING FOR EASTERN HILLSBOROUGH OF NEW HAMPSHIRE...THIS
INCLUDES THE CITIES OF MANCHESTER AND NASHUA.

ACCUMULATING SNOW HAS SHIFTED SOUTHEAST INTO NORTHEAST MASSACHUSETTS...
MAINLY SOUTHEAST OF INTERSTATE 495. ONLY LIGHT SNOW OR FLURRIES
EXPECTED FOR THE REMAINDER OF EASTERN HILLSBOROUGH OF NEW
HAMPSHIRE...INCLUDING THE CITIES OF MANCHESTER AND NASHUA.
THUS...LITTLE IF ANY ACCUMULATION IS EXPECTED.


$$

MAZ004-026-NHZ015-201815-
/O.CAN.KBOX.SN.Y.0005.000000T0000Z-071221T0100Z/
NORTHERN WORCESTER MA-NORTHERN MIDDLESEX MA-
WESTERN AND CENTRAL HILLSBOROUGH NH-
INCLUDING THE CITIES OF...BARRE...FITCHBURG...AYER...
PETERBOROUGH...WEARE
1212 PM EST THU DEC 20 2007

...SNOW ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS CANCELED THE SNOW
ADVISORY FOR NORTHERN PORTIONS OF WORCESTER AND MIDDLESEX COUNTIES OF
MASSACHUSETTS...INCLUDING WESTERN AND CENTRAL HILLSBOROUGH COUNTY OF
NEW HAMPSHIRE. THIS INCLUDES THE CITIES OF...BARRE...FITCHBURG...AYER...
PETERBOROUGH AND WEARE.

ACCUMULATING SNOW HAS SHIFTED SOUTHEAST INTO NORTHEAST MASSACHUSETTS...
MAINLY SOUTHEAST OF INTERSTATE 495. ONLY LIGHT SNOW OR FLURRIES
EXPECTED FOR THE REMAINDER OF THIS AFTERNOON...WITH LITTLE IF ANY
ADDITIONAL SNOW ACCUMULATIONS.

$$

MAZ006-007-202000-
/O.CON.KBOX.HS.W.0003.000000T0000Z-071221T0100Z/
WESTERN ESSEX MA-EASTERN ESSEX MA-
INCLUDING THE CITIES OF...LAWRENCE...GLOUCESTER
1212 PM EST THU DEC 20 2007

...HEAVY SNOW WARNING REMAINS IN EFFECT UNTIL 8 PM EST THIS
EVENING...

A HEAVY SNOW WARNING REMAINS IN EFFECT UNTIL 8 PM EST THIS
EVENING FOR ESSEX COUNTY MASSACHUSETTS. THIS INCLUDES THE CITIES
OF LAWRENCE AND GLOUCESTER.

AT NOON THE HEAVIEST SNOW WAS LOCATED OVER ESSEX COUNTY...MAINLY
ALONG AND EAST OF INTERSTATE 95 SOUTHWARD INTO BOSTON. SNOW...HEAVY
AT TIMES WILL CONTINUE INTO AT LEAST EARLY AFTERNOON ACROSS THIS AREA...
BEFORE DIMINISHING TO FLURRIES LATE IN THE DAY. 

AN ADDITIONAL 2 TO 4 INCHES OF SNOW IS EXPECTED THIS AFTERNOON...
BEFORE SNOW TAPERS OFF TO FLURRIES THIS EVENING. THIS WILL BRING
TOTAL SNOWFALL TO 4 TO 7 INCHES. THEREFORE...EXPECT HAZARDOUS TRAVEL
FOR THE LATE DAY COMMUTE...WITH CONDITIONS IMPROVING DURING THE
EVENING HOURS.

A HEAVY SNOW 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.

$$

MAZ016-202000-
/O.EXA.KBOX.SN.Y.0005.000000T0000Z-071221T0100Z/
EASTERN NORFOLK MA-
INCLUDING THE CITY OF...QUINCY
1212 PM EST THU DEC 20 2007

...SNOW ADVISORY IN EFFECT UNTIL 8 PM EST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A SNOW ADVISORY
FOR EASTERN NORFOLK COUNTY OF MASSACHUSETTS. THIS INCLUDES THE CITY
OF QUINCY AND NEARBY TOWNS. THE SNOW ADVISORY IS IN EFFECT UNTIL 8 PM
EST THIS EVENING.

AT NOON THE HEAVIEST SNOW WAS LOCATED ALONG THE EASTERN MASSACHUSETTS 
COAST...MAINLY EAST OF ROUTE 128. SNOW...HEAVY AT TIMES WILL CONTINUE
INTO AT LEAST EARLY AFTERNOON ACROSS THIS AREA...BEFORE DIMINISHING
TO FLURRIES LATE IN THE DAY.

AN ADDITIONAL 1 TO 2 INCHES OF SNOW IS EXPECTED THIS AFTERNOON...
BEFORE SNOW TAPERS OFF TO FLURRIES THIS EVENING. THIS WILL BRING
TOTAL SNOWFALL TO 2 TO 4 INCHES ACROSS THE AREA. THEREFORE...EXPECT
HAZARDOUS TRAVEL FOR THE LATE DAY COMMUTE...WITH CONDITIONS IMPROVING
DURING THE EVENING HOURS.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

MAZ013>015-202000-
/O.CON.KBOX.SN.Y.0005.000000T0000Z-071221T0100Z/
WESTERN NORFOLK MA-SOUTHEAST MIDDLESEX MA-SUFFOLK MA-
INCLUDING THE CITIES OF...FOXBORO...NORWOOD...CAMBRIDGE...BOSTON
1212 PM EST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 8 PM EST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 8 PM EST THIS EVENING FOR WESTERN
NORFOLK...SOUTHEAST MIDDLESEX AND SUFFOLK COUNTIES OF MASSACHUSETTS.
THIS INCLUDES THE GREATER BOSTON AREA...FOXBORO...NORWOOD...CAMBRIDGE
AND NEARBY TOWNS.

AT NOON THE HEAVIEST SNOW WAS LOCATED ALONG THE EASTERN MASSACHUSETTS 
COAST...MAINLY EAST OF ROUTE 128. SNOW...HEAVY AT TIMES WILL CONTINUE
INTO AT LEAST EARLY AFTERNOON ACROSS THIS AREA...BEFORE DIMINISHING
TO FLURRIES LATE IN THE DAY.

AN ADDITIONAL 1 TO 2 INCHES OF SNOW IS EXPECTED THIS AFTERNOON...
BEFORE SNOW TAPERS OFF TO FLURRIES THIS EVENING. THIS WILL BRING
TOTAL SNOWFALL TO 2 TO 4 INCHES ACROSS THE AREA. THEREFORE...EXPECT
HAZARDOUS TRAVEL FOR THE LATE DAY COMMUTE...WITH CONDITIONS IMPROVING
DURING AS THE EVENING PROGRESSES.

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

NOCERA
000 
WWUS41 KBOX 202027
WSWBOX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE TAUNTON MA
327 PM EST THU DEC 20 2007

...STEADY SNOW ACROSS EASTERN MASSACHUSETTS IS BECOMING MORE
INTERMITTENT AT 3 PM AND WILL TAPER OFF TO LIGHT SNOW OR FLURRIES
THIS EVENING...

MAZ006-007-202230-
/O.CON.KBOX.HS.W.0003.000000T0000Z-071221T0100Z/
WESTERN ESSEX MA-EASTERN ESSEX MA-
INCLUDING THE CITIES OF...LAWRENCE...GLOUCESTER
327 PM EST THU DEC 20 2007

...HEAVY SNOW WARNING REMAINS IN EFFECT UNTIL 8 PM EST THIS
EVENING...

A HEAVY SNOW WARNING REMAINS IN EFFECT UNTIL 8 PM EST THIS
EVENING FOR ESSEX COUNTY OF MASSACHUSETTS. THIS INCLUDES THE CITIES
OF LAWRENCE...GLOUCESTER AND NEARBY TOWNS.

AT 3 PM STEADY SNOW HAS GIVEN WAY TO PERIODS OF MAINLY LIGHT SNOW
ACROSS THE AREA. A BAND OF STEADIER AND SOMEWHAT HEAVIER SNOW WAS
COMING ONSHORE FROM THE OCEAN...AND WILL OVERSPREAD THE REGION
BETWEEN 330 PM AND 5 PM. THEREFORE...A COATING TO ANOTHER INCH OR SO
OF ACCUMULATION IS POSSIBLE DURING THE LATE DAY COMMUTE. THIS WILL
RESULT IN SLIPPERY TRAVEL...ESPECIALLY ON UNTREATED SURFACES. 

SNOW WILL TAPER OFF TO FLURRIES THIS EVENING. THIS WILL BRING SNOW
TOTALS TO 4 TO 8 INCHES ACROSS ESSEX COUNTY.

A HEAVY SNOW 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.

$$

MAZ005-013>016-202230-
/O.CON.KBOX.SN.Y.0005.000000T0000Z-071221T0100Z/
CENTRAL MIDDLESEX MA-WESTERN NORFOLK MA-SOUTHEAST MIDDLESEX MA-
SUFFOLK MA-EASTERN NORFOLK MA-
INCLUDING THE CITIES OF...FRAMINGHAM...LOWELL...FOXBORO...
NORWOOD...CAMBRIDGE...BOSTON...QUINCY
327 PM EST THU DEC 20 2007

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 8 PM EST THIS EVENING...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 8 PM EST THIS EVENING FOR 
MUCH OF MIDDLESEX COUNTY...NORFOLK AND SUFFOLK COUNTIES. THIS
INCLUDES THE CITIES OF...FRAMINGHAM...LOWELL...FOXBORO...NORWOOD...
CAMBRIDGE...BOSTON...QUINCY AND NEARBY TOWNS.

AT 3 PM STEADY SNOW HAS GIVEN WAY TO PERIODS OF MAINLY LIGHT SNOW.
HOWEVER...A BAND OF STEADIER AND SOMEWHAT HEAVIER SNOW WAS COMING
ONSHORE FROM THE OCEAN AND WILL OVERSPREAD THE REGION BETWEEN 330 PM
AND 5 PM. THEREFORE...A COATING TO PERHAPS ANOTHER INCH OR TWO OF
ADDITIONAL ACCUMULATION IS LIKELY DURING THE LATE DAY COMMUTE. THIS
WILL RESULT IN SLIPPERY TRAVEL...ESPECIALLY ON UNTREATED SURFACES.  

SNOW WILL TAPER OFF TO FLURRIES THIS EVENING WITH TOTAL SNOWFALL
ACROSS THE GREATER BOSTON AREA OF 2 TO 5 INCHES. 

A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY
TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING.

$$

NOCERA
000 
WWUS41 KBOX 202228
WSWBOX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE TAUNTON MA
528 PM EST THU DEC 20 2007

MAZ006-007-202330-
/O.CAN.KBOX.HS.W.0003.000000T0000Z-071221T0100Z/
WESTERN ESSEX MA-EASTERN ESSEX MA-
INCLUDING THE CITIES OF...LAWRENCE...GLOUCESTER
528 PM EST THU DEC 20 2007

...HEAVY SNOW WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS CANCELLED THE HEAVY
SNOW WARNING. 

OCCASIONAL LIGHT SNOW WILL CONTINUE THIS EVENING BEFORE TAPERING OFF
OVERNIGHT. ANY ADDITIONAL ACCUMULATION WILL BE AN INCH OR LESS.

$$

MAZ005-013>016-202330-
/O.CAN.KBOX.SN.Y.0005.000000T0000Z-071221T0100Z/
CENTRAL MIDDLESEX MA-WESTERN NORFOLK MA-SOUTHEAST MIDDLESEX MA-
SUFFOLK MA-EASTERN NORFOLK MA-
INCLUDING THE CITIES OF...FRAMINGHAM...LOWELL...FOXBORO...
NORWOOD...CAMBRIDGE...BOSTON...QUINCY
528 PM EST THU DEC 20 2007

...SNOW ADVISORY IS CANCELLED...

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

OCCASIONAL LIGHT SNOW WILL CONTINUE THIS EVENING BEFORE TAPERING OFF
OVERNIGHT. ANY ADDITIONAL ACCUMULATION WILL BE AN INCH OR LESS.

$$

KJC

What forecasters said that day

The local office's own words before this snow 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 snow advisory went out at Dec 20, 7:30 AM EST, 25 minutes earlier.

Area forecast discussion, Dec 20, 7:30 AM EST, 25 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAUNTON MA
730 AM EST THU DEC 20 2007

.SYNOPSIS...
INTENSIFYING LOW PRES ABOUT 80 NM E OF NANTUCKET EARLY THIS MORNING
WILL BECOME A GALE CENTER LATER TODAY. COLDER WEATHER WILL FOLLOW
FRI AND SAT AS STRONG HIGH PRES OVER QUEBEC BUILDS INTO NEW ENGLAND.
A STRONG COLD FRONT LATE THIS WEEKEND IS PRECEDED BY A PERIOD OF
MILD WIND DRIVEN...AND POSSIBLY HEAVY SHOWERS. THE COLD FRONT MOVES
OFFSHORE SUN NIGHT WITH A RETURN TO DRY BUT COLDER WEATHER NEXT WEEK.

&&

.NEAR TERM /UNTIL 7 PM THIS EVENING/...
***WINTER WEATHER ADVISORY CONTINUES FOR SNOWFALL AND SOME FREEZING
RAIN ACROSS NE MA AND S CENTRAL NH***

WSW UPDATED AT 723 AM. PRODUCT AMT INCREASES WILL FOLLOW BY 830 AM. I
THINK WE COULD SEE ISOLATED 9 INCH AMOUNTS SOMEWHERE BTWN ASH-LWM-BVY.
4.8 AT ASH NOW. I HAVE TO UPGRADE AND WILL DO SO IN THE NEXT 45 MINUTES.

PNSS POSTING SWIFTLY NOW. 0.2 AT THE OFFICE HERE AT 655AM IN LAST
HALF HOUR SOME BIG FLAKE SNOW SHOWERS.

VERY GOOD DENDRITIC GROWTH CONTS FOR THE 15Z-19Z TIME FRAME TODAY IN
THE BOS NORTH SHORE AREA TO NR MHT. AM STILL ON THE EDGE FOR AN
UPGRADE TO A WINTER STORM WARNING MHT-ASH- ESSEX COUNTY
REGION...HOLDING OFF FOR NOW. WD 539A

A FEW SMALL BUT SOMEWHAT SIGNIFICANT FEATURES HAVE DEVELOPED DURING
THE EARLY MORNING HOURS. FIRST...NOTED THAT BOTH KLWM AND KBVY WERE
REPORTING FREEZING RAIN THROUGH THE OVERNIGHT. FELT THIS WAS A
PROBLEM WITH THE SENSORS...UNTIL A CONF CALL WITH WFO GYX. THEY
NOTED ON A SPECIAL 06Z SOUNDING THEY DID THAT THERE WAS A STRONG
INVERSION /FROM AROUND -9C JUST OFF THE GROUND TO AROUND 0C AT ABOUT
930 HPA/...LIKELY DUE TO THE DEVELOPING COASTAL FRONT AND
OVERRUNNING WORKING OVER THAT. BASED ON THIS...WILL BE ISSUING A
WINTER WEATHER ADVISORY FOR SNOW AND FREEZING RAIN FOR EASTERN ESSEX
COUNTY THROUGH AROUND 10 AM.

APPEARS THAT MOST OF FIRST BATCH OF PRECIP MOVING ACROSS EASTERN
MASS INTO SE AND S CENTRAL NH THIS MORNING. HOWEVER...NOTING ANOTHER
BATCH OF PRECIP WORKING ACROSS NEW YORK STATE ASSOCIATED WITH UPPER
LEVEL SYSTEM AND WEAKENING FIRST SURFACE LOW. ONCE THE INVERTED
TROUGH BECOMES ESTABLISHED LATER THIS MORNING...THIS MOISTURE WILL
MERGE WITH ONSHORE FLOW TO DEVELOP HEAVIER PRECIP ACROSS EASTERN AND
NORTHERN AREAS. GOOD MOISTURE CONVERGENCE COMING INTO PLACE...SO
FEEL THAT THE HEAVIEST PRECIP WILL STILL OCCUR OVER SOUTH CENTRAL
NEW HAMPSHIRE INTO NORTHEASTERN MASS THROUGH TODAY. WILL KEEP WINTER
WEATHER ADVISORY IN PLACE THROUGH THE DAY FOR INTERIOR ESSEX...
NORTHERN MIDDLESEX AND HILLSBOROUGH COUNTIES.  WILL NEED TO MONITOR
THIS CLOSELY THOUGH.

THANKS TO OUR SPOTTERS FOR THEIR EARLY MORNING WEB ENTRIES ON OUR
WEBSITE AS WELL AS EASTERN US WEATHER FORUM PARTICIPANTS FOR POSTING
SNOWFALL AMOUNTS AND CHANGING TYPES OF PRECIP /NOTED SOME SLEET THAT
FELL ACROSS SOME OF THE ADVISORY AREA EARLIER THIS MORNING/. HAVE
RECEIVED REPORTS OF 1.5 TO 2.3 INCHES SO FAR.  AT 430 AM...REPORT OF
3.8 AT MERRIMACK NH.

88D RADAR STARTING TO SHOW SOME POSSIBLE BRIGHT BANDING S OF
BOSTON...WHICH COULD BE INDICATOR OF CHANGE LINE. NOTED THAT KBOS
REPORTED -RASN ON 08Z OBSERVATION. SINCE 4 AM...HAVE ALSO NOTED THAT
WHAT APPEARS TO BE INCREASING REFLECTIVITIES FROM NEAR BOSTON ALONG
I-93 TO MANCHESTER. THE REPORT FROM MERRIMACK NOTED THAT THE
OBSERVER RECEIVED 1.5 IN 2 HOURS WITH MODERATE TO HEAVY SNOW.

SHORT RANGE MODELS IN GOOD AGREEMENT AGAIN THIS MORNING...BUT FEEL
THAT THE GFS HAS A GOOD HANDLE ON DEVELOPING INVERTED TROUGH AND ITS
POTENTIAL OF DEVELOPING GOOD AMOUNTS OF QPF. ALSO NOTED GOOD
DENDRITIC GROWTH LATER THIS MORNING INTO THE AFTERNOON AS THE TROUGH
DEVELOPS. ALSO NOTE THAT THE COLDER AIR WILL SWEEP SOUTHWARD...WHICH
WILL HELP IN DEVELOPING A POSSIBLE BURST OF SNOW OVER NORTHERN AND
EASTERN AREAS AS DENDRITIC GROWTH GETS GOING.

HAVE KEPT HIGHEST POPS OVER EASTERN MASSACHUSETTS INTO SOUTHERN NEW
HAMPSHIRE. EXPECT PRECIP AREA TO INCREASE IN COVERAGE AND SLIP DOWN
THE COAST. THIS...ALONG WITH COLDER AIR WORKING INTO THE REGION ON N
WINDS...SO SHOULD SEE PRECIP CHANGING OVER TO SNOW DURING THE
AFTERNOON ACROSS MOST AREAS EXCEPT ALONG THE SOUTH COAST...CAPE AND
ISLANDS.

QUESTION AT THIS POINT WILL BE IF HIGHER QPF DEVELOPS WITH THIS
TROUGH AND HOW FAR DOWN THE COAST THIS WILL WORK. AT THIS POINT...
WILL CARRY 1-3 SNOW AS FAR S AS BOSTON AND THE ROUTE 128
BELT...WITH AMOUNTS OF 3-6 OVER THE ADVISORY AREA. THIS WILL
CONTINUE INTO THIS EVENING.

&&

.SHORT TERM /7 PM THIS EVENING THROUGH 6 AM FRIDAY/...
CONTINUE TO SEE GOOD DYNAMICS IN PLACE ACROSS EASTERN AREAS EARLY
TONIGHT...SO WILL SEE SNOW CONTINUING. MODELS BEGIN TO BREAK DOWN
THE INVERTED TROUGH LATER TONIGHT...SO COULD SEE PRECIP BECOMING
MORE SPORADIC. ONLY CARRIED CHANCE POPS FOR NOW...BUT WOULD NOT BE
SURPRISED TO INCREASE POPS ESPECIALLY THROUGH MIDNIGHT DEPENDING
UPON WHETHER THE MOISTURE CONVERGENCE REMAINS IN PLACE OR SHIFTS
EAST.

HIGH PRESSURE BEGINS TO BUILD S OUT OF QUEBEC AFTER MIDNIGHT...
WHICH SHOULD HELP BEGIN TO BREAK DOWN THE TROUGH. ALSO EXPECT
CLOUDS TO BEGIN BREAKING UP FROM THE NORTH AS THE HIGH BUILDS IN.

&&

.LONG TERM /FRIDAY THROUGH WEDNESDAY/...
KEEPING THIS SHORT SO WE CAN STAY FOCUSED ON CURRENT EVENTS.

FRIDAY AND SATURDAY...MINOR COASTAL FLOODING TIME OF HIGH TIDE E MASS
COAST FRI MORNING. WELL REREVIEW EXTENT DURING THE DAY SHIFT. LEFTOVER
10 FT SEAS IN LONG ELY FETCH AND A NEAR 1 FT SURGE. OUR BHB NOS TIDE
GAGE IS OTS ATTM.  WELL CALL NOS LATER THIS MORNING.

SUSPECT SURPRISINGLY COLD...TUCK OF TYPICAL COASTAL PLAIN COLD AIR
FLOWING SWWD FROM MAINE REACHING NE MASS FIRST THEN EVENTUALLY
SEEPING WWD ACROSS THE HILLS INTO THE CT RVR VALLEY SATURDAY MORNING.
IF ITS CLOUDY...BAD NEWS... MOS GUIDANCE WILL WAY OVERSHOOT. HAVE
UNDERCUT DAYTIME GUIDANCE SUBSTANTIALLY FRIDAY AND SATURDAY. SHORTEST
DAYS OF THE YEAR. ALSO...THERE COULD BE SPITS OF FLURRIES HERE AND
THERE IN THE MOIST CHILLY AIR. LATEST SREF/EC OFFER WEAK SUPPORT.
SOMETIMES FOLKS WILL REFER TO THIS AS A DIRTY HIGH BECAUSE ITS
LITTERED WITH CLOUDS.

SUNDAY...IF OUR READ ON THE COLDER THAN MOS GUIDANCE IS CORRECT...NAM
GAVE US CONSIDERABLE SUPPORT ON THIS...THEN WE HAVE A PROBABLE ICING
SITN DEVELOPING EARLY SUNDAY IN AT LEAST A PTN OF THE INTERIOR.

THEN...HOW WARM DOES IT GET IN THE AFTN/EVE? COASTAL PLAIN OPENS UP
WHERE 70 KT 925 JET SHOULD DRAG MILDER MARITIME AIR NORTH AND I
WARMED ABOVE GUIDANCE FOR AN HR OUR 3 LATE IN THE DAY...USING AS MY
GUIDE FOR MAX TEMPS...THE 1000-500K RULE...WHATEVER ITS VALUE ON WAA
SLY FLOW...PROVIDED BL WIND EXCEEDS 22 KTS. JET IS STRONG BUT AM NOT
SURE HOW MUCH THE RICHARDSON NUMBER-EDDY TRANSFER WILL ALLOW FOR
GUSTS TO PUNCH DOWN TO THE SFC. WILL REREVIEW NEXT FEW DAYS.

MONDAY-WEDNESDAY...STAYED CLOSE TO OUR FCST FROM LATE YDY THO
INCREASED THE WINDS MONDAY AND COOLED IT TAF BOTH THE EARLY MORNING
AND DAYTIME MAXS.

YES...NEXT WED THERE MIGHT BE ANOTHER COASTAL BUT HAVENT HAD TIME TO
CK ENSEMBLES NOR IS IT ANYTHING MORE RIGHT NOW THAN A SMALL CHC AND
CONSIDER IT A CLOSE PASS...BUT WORTHY OF MONITORING DAY-DAY TRENDS ON
THE TRACK. SOONER OR LATER THESE COASTALS WILL MISS SNE.

&&

.AVIATION /13Z THURSDAY THROUGH MONDAY/...
TODAY...EXPECT MVFR-IFR CONDITIONS ACROSS THE REGION AT LEAST
THROUGH MIDDAY. CONDITIONS MAY IMPROVE TO VFR OVER THE CONNECTICUT
VALLEY OF MA AND CT WITH DRIER AIR WORKING IN...BUT WILL REMAIN
MVFR-IFR ESPECIALLY OVER EASTERN AND CENTRAL MASS INTO SOUTHERN NH.

TONIGHT...EXPECT CEILINGS TO IMPROVE TO VFR OVER WESTERN AREAS EARLY
TONIGHT. WILL LIKELY SEE AT LEAST MVFR CONDITIONS...WITH SPOTTY IFR
CEILINGS AND VSBYS ALONG THE EAST COAST OF MA INTO S NH.

OUTLOOK...
FRIDAY THROUGH MONDAY...
FRI-SAT...LEFTOVER TRAPPED CHILLY MOIST AIR. MVFR-IFR CIGS MOST TAF
SITES.

SUN...ICE POSSIBLE BAF/BDL/ORH/MHT EARLY OTRW IFR CONDS. LLWS POSSIBLE.
MON...VFR WIND.

&&

.MARINE...
N-NE WINDS WILL BEGIN TO INCREASE THIS MORNING...AND EXPECT SMALL
CRAFT CRITERIA WINDS BY MIDDAY OFF THE COAST. WITH ONSHORE
FLOW...SEAS WILL BUILD QUICKLY AS SUGGESTED BY THE GFS SWAN MODEL.
SEAS MAY BUILD TO 10-12 FEET OFF THE EAST COAST TONIGHT. EXTENDED
SMALL CRAFT THROUGH TONIGHT AS COLDER AIR WILL WORK IN KEEPING WINDS
GOING OVER THE RELATIVELY WARMER WATERS.

FRIDAY THROUGH MONDAY...
LEFTOVER SCA FRI.

SAT...RELATIVELY QUIET.

SUN...A SLY GALE PROBABLE LATER IN THE DAY.

MON...A WLY GALE PROBABLE FOR A PTN OF THE DAY.

&&

.CLIMATE...
LAST SEASONS 2006-07 SNOWFALL AND THIS YEAR SO FAR...

    06-07 07-08
 BOS 17.1 19.6
 BDL 24.0 15.9
 ORH 49.7 20.3
 PVD 15.1 14.0

DEC THRU THE 18TH TEMP DEPARTURES
 BOS -6.9
 BDL -5.1
 ORH -6.8
 PVD -5.5

PAST TWO WEEKS OF EVENTS HAVE BEEN HELPFUL AND NICE EARLY SEASON
SNOWPACK WELL ABV NORMAL /SOME SPOTS 8+ INCHES ABV NORMAL/ WITH
ROUGHLY 1-4INCHES OF SWE.

PCPN PERCENT DEPARTURE FROM NORMAL ABOUT 110 PCT OF NORMAL SW 60 PCT
OF THE FCST AREA...STILL ABT 75 PCT OF NORMAL NE 40 PCT OF THE FCST
AREA.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...NONE.
MA...WINTER WEATHER ADVISORY UNTIL 8 PM EST THIS EVENING FOR
     MAZ005>007-014-026.
NH...WINTER WEATHER ADVISORY UNTIL 8 PM EST THIS EVENING FOR NHZ012-
     015.
RI...NONE.
MARINE...SMALL CRAFT ADVISORY FROM 8 PM THIS EVENING TO 5 AM EST FRIDAY
     FOR ANZ230>235-237.
     SMALL CRAFT ADVISORY FROM 8 PM THIS EVENING TO 5 PM EST FRIDAY
     FOR ANZ250-254-255.

&&

SYNOPSIS...DRAG/EVT
NEAR TERM...DRAG 730AM
SHORT TERM...EVT
LONG TERM...DRAG
AVIATION...DRAG/EVT
MARINE...DRAG/EVT
CLIMATE...DRAG 730AM
Hazardous weather outlook, Dec 20, 4:48 AM EST, 3 hours 7 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAUNTON MA
448 AM EST THU DEC 20 2007

CTZ002>004-MAZ002>004-008>013-016>018-020-021-023-NHZ011-RIZ001>008-
211000-
HARTFORD CT-TOLLAND CT-WINDHAM CT-WESTERN FRANKLIN MA-
EASTERN FRANKLIN MA-NORTHERN WORCESTER MA-WESTERN HAMPSHIRE MA-
WESTERN HAMPDEN MA-EASTERN HAMPSHIRE MA-EASTERN HAMPDEN MA-
SOUTHERN WORCESTER MA-WESTERN NORFOLK MA-EASTERN NORFOLK MA-
NORTHERN BRISTOL MA-WESTERN PLYMOUTH MA-SOUTHERN BRISTOL MA-
SOUTHERN PLYMOUTH MA-DUKES MA-CHESHIRE NH-NORTHWEST PROVIDENCE RI-
SOUTHEAST PROVIDENCE RI-WESTERN KENT RI-EASTERN KENT RI-BRISTOL RI-
WASHINGTON RI-NEWPORT RI-BLOCK ISLAND RI-
448 AM EST THU DEC 20 2007

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

.DAY ONE...TODAY AND TONIGHT

FLURRIES IN CONNECTICUT AND RHODE ISLAND WILL BECOME SMALL ACCUMULATIONS
OF STEADIER SNOW SHOWERS IN WESTERN MASSACHUSETTS UP. ONE TO 3 INCHES F
NEW SNOW WILL FALL IN CHESHIRE COUNTY NEW HAMPSHIRE AS WELL AS PORTIONS
OF SOUTHEAST MASSACHUSETTS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

EARLY SUNDAY...THERE IS A MODERATE RISK OF FREEZING RAIN OR FREEZING DRIZZLE
OVER INTERIOR SOUTHERN NEW ENGLAND.

LATE SUNDAY THERE IS A LOW RISK OF MINOR POOR DRAINAGE AND URBAN FLOODING...
AS HEAVY SHOWERS COMBINE WITH A BRIEF PERIOD OF SIGNIFICANT SNOW MELT.
IN ADDITION...A WIND ADVISORY MAY BE NEEDED LATE SUNDAY ALONG THE COAST
FOR STRONG SOUTH WINDS FOLLOWED BY STRONG WEST WINDS AT NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT LIKELY BE NEEDED.

MAZ005-006-026-NHZ012-015-211000-
CENTRAL MIDDLESEX MA-WESTERN ESSEX MA-NORTHERN MIDDLESEX MA-
EASTERN HILLSBOROUGH NH-WESTERN AND CENTRAL HILLSBOROUGH NH-
448 AM EST THU DEC 20 2007

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 PM EST THIS EVENING...

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

.DAY ONE...TODAY AND TONIGHT

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

   WINTER WEATHER ADVISORY.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

SUNDAY EARLY...THERE IS A LOW PROBABILITY OF SPOTTY FREEZING DRIZZLE TO
START THE DAY.

LATE SUNDAY...THERE IS A LOW RISK OF MINOR POOR DRAINAGE AND URBAN TYPE
FLOODING...AS HEAVY SHOWERS COMBINE WITH A BRIEF PERIOD OF SIGNIFICANT
SNOW MELT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED TODAY.

ANZ231>237-250-254-255-270-211000-
CAPE COD BAY-NANTUCKET SOUND-VINEYARD SOUND-BUZZARDS BAY-
RHODE ISLAND SOUND-NARRAGANSETT BAY-BLOCK ISLAND SOUND-
COASTAL WATERS FROM MERRIMACK RIVER MA OUT 25 NM TO PLYMOUTH MA OUT
40 NM...INCLUDING THE STELLWAGEN BANK NATIONAL MARINE SANCTUARY-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-
COASTAL WATERS FROM MONTAUK NY TO BLOCK ISLAND RI TO MARTHAS
VINEYARD MA TO NANTUCKET MA SOUTHEAST TO 20 NM-
WATERS FROM MERRIMACK RIVER MA TO WATCH HILL RI FROM 25 TO 40 NM-
448 AM EST THU DEC 20 2007

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

.DAY ONE...TODAY AND TONIGHT

THERE IS A LOW PROBABILITY OF NORTHEAST GALES LATE TODAY ACROSS
THE OUTER EASTERN MASSACHUSETTS WATERS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THERE IS A MODERATE RISK OF SOUTHERLY GALES LATE SUNDAY AND THEN
WESTERLY GALES MONDAY.

THERE IS A LOW PROBABILITY OF A NORTHEAST GALE IN THE OUTER WATERS
DURING THE MIDDLE OF NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED.

ANZ230-MAZ015-019-022-024-211000-
BOSTON HARBOR-SUFFOLK MA-EASTERN PLYMOUTH MA-BARNSTABLE MA-
NANTUCKET MA-
448 AM EST THU DEC 20 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN
MASSACHUSETTS...SOUTHEASTERN MASSACHUSETTS AND MASSACHUSETTS
COASTAL WATERS.

.DAY ONE...TODAY AND TONIGHT

SNOW WILL MAKE TRAVEL DIFFICULT TODAY IN THE BOSTON METRO AREA. AN
ADVISORY MAY NEED TO BE ISSUED LATER THIS MORNING.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THERE IS A GOOD CHANCE OF MINOR COASTAL FLOODING EARLY FRIDAY AS A 1
FOOT STORM SURGE COMBINES WITH 10 FOOT OCEAN SWELLS TO POSSIBLY CLOSE
A FEW VULNERABLE COASTAL ROADS NEAR THE TIME OF THE FRIDAY MORNING
HIGH TIDE.

SUNDAY AND SUNDAY NIGHT THERE IS A LOW RISK OF MINOR POOR DRAINAGE
AND URBAN TYPE FLOODING...AS HEAVY SHOWERS COMBINE WITH A BRIEF BUT
SIGNIFICANT SNOW MELT. IN ADDITION...A WIND ADVISORY MAY BE NEED FOR
THE SAME TIME PERIOD ALONG THE COAST FOR STRONG SOUTH WINDS FOLLOWED
BY STRONG WEST WINDS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED.

MAZ007-211000-
EASTERN ESSEX MA-
448 AM EST THU DEC 20 2007

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 10 AM EST THIS MORNING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEASTERN MASSACHUSETTS.

.DAY ONE...TODAY AND TONIGHT

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

   WINTER WEATHER ADVISORY.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

THERE IS A GOOD CHANCE OF MINOR COASTAL FLOODING EARLY FRIDAY AS A 1 FOOT
STORM SURGE COMBINES WITH 10 FOOT OCEAN SWELLS TO POSSIBLY CLOSE A FEW
VULNERABLE COASTAL ROADS FOR AN HOUR OR SO NEAR THE TIME OF THE 8 AM HIGH
TIDE.

SUNDAY AND SUNDAY NIGHT THERE IS A LOW RISK OF MINOR POOR DRAINAGE AND
URBAN TYPE FLOODING...AS HEAVY SHOWERS COMBINE WITH A SIGNIFICANT BUT
BRIEF SNOW MELT.

IN ADDITION...A WIND ADVISORY MAY BE NEEDED...FIRST FOR SOUTHERLY
WINDS LATER IN THE DAY FOLLOWED BY STRONG WESTERLIES LATER AT NIGHT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED.

MAZ014-211000-
SOUTHEAST MIDDLESEX MA-
448 AM EST THU DEC 20 2007

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 PM EST THIS EVENING...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN MASSACHUSETTS.

.DAY ONE...TODAY AND TONIGHT

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

   WINTER WEATHER ADVISORY.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

SUNDAY AND SUNDAY NIGHT THERE IS A LOW RISK OF MINOR POOR DRAINAGE AND
URBAN FLOODING...AS HEAVY SHOWERS COMBINE WITH A BRIEF SIGNIFICANT
SNOW MELT.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL LIKELY BE NEEDED.

DRAG

In the hours before

Special weather statement, Dec 20, 5:21 AM EST, 2 hours 34 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
521 AM EST THU DEC 20 2007

MAZ004-012-013-015>018-NHZ011-201800-
NORTHERN WORCESTER MA-SOUTHERN WORCESTER MA-WESTERN NORFOLK MA-
SUFFOLK MA-EASTERN NORFOLK MA-NORTHERN BRISTOL MA-
WESTERN PLYMOUTH MA-CHESHIRE NH-
INCLUDING THE CITIES OF...BARRE...FITCHBURG...MILFORD...
WORCESTER...FOXBORO...NORWOOD...BOSTON...QUINCY...TAUNTON...
BROCKTON...JAFFREY...KEENE
521 AM EST THU DEC 20 2007

LIGHT ACCUMULATIONS OF SNOW WILL FALL ACROSS SOUTHWEST NEW HAMPSHIRE
THROUGH CENTRAL AND EASTERN MASSACHUSETTS TODAY.

LIGHT SNOW WAS FALLING EARLY THIS MORNING FROM NEAR JAFFREY NEW
HAMPSHIRE AND FITCHBURG THROUGH WORCESTER TO BOSTON AND NORWOOD.
SOME POCKETS OF FREEZING RAIN ALSO DEVELOPED.

AS LOW PRESSURE DEVELOPS EAST OF NANTUCKET TODAY...COLDER AIR WILL
WORK ACROSS THE REGION OUT OF NORTHERN NEW ENGLAND. THIS WILL COMBINE
WITH THE MOISTURE ACROSS THE REGION TO CHANGE ANY MIXED PRECIPITATION
OR RAINFALL TO SNOW BY AROUND MIDDAY. LIGHT ACCUMULATIONS ARE
EXPECTED...WHICH WILL CAUSE SLIPPERY ROADWAYS THROUGH THE DAY.

THERE IS THE POSSIBILITY OF SOMEWHAT HEAVIER SNOW TO FALL FROM AROUND
MIDDAY INTO THE EVENING HOURS WITH THE DROPPING TEMPERATURES. IF
THIS DOES OCCUR...IT MAY BECOME NECESSARY TO ISSUE A WINTER WEATHER
ADVISORY.

STAY TUNED TO NOAA WEATHER RADIO ALL HAZARDS OR YOUR FAVORITE RADIO
OR TELEVISION STATION FOR THE LATEST ON THIS WEATHER SITUATION.

EVT

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 20, 7:55 AM ESTHeavy Snow WarningBOXHillsborough10 hr

Nearby

Snow Advisories in Massachusetts, 2007Snow Advisories in New Hampshire, 2007Every snow advisory in 2007

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.