Snow Advisory 4, NWS Boston/Norton, MA

000 
WWUS41 KBOX 051502
WSWBOX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE TAUNTON MA
1102 AM EDT WED APR 5 2006

...AN EARLY APRIL SNOW WILL GRADUALLY END FROM THE SOUTHWEST THROUGH MIDDAY...

CTZ002>004-MAZ008>012-RIZ001-052200-
/O.CON.KBOX.SN.Y.0004.000000T0000Z-060405T2200Z/
HARTFORD CT-TOLLAND CT-WINDHAM CT-WESTERN HAMPSHIRE MA-
WESTERN HAMPDEN MA-EASTERN HAMPSHIRE MA-EASTERN HAMPDEN MA-
SOUTHERN WORCESTER MA-NORTHWEST PROVIDENCE RI-
INCLUDING THE CITIES OF...HARTFORD...WINDSOR LOCKS...UNION...
VERNON...PUTNAM...WILLIMANTIC...CHESTERFIELD...BLANDFORD...
AMHERST...NORTHAMPTON...SPRINGFIELD...MILFORD...WORCESTER...
FOSTER...SMITHFIELD
1102 AM EDT WED APR 5 2006

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 6 PM EDT THIS
AFTERNOON...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 6 PM EDT THIS AFTERNOON. 

DEVELOPING LOW PRESSURE ALONG THE SOUTHERN NEW ENGLAND COAST
CONTINUES TO PRODUCE SNOW AT VARYING INTENSITY LATE THIS MORNING.
SNOWFALL OF 2 TO 4 INCHES HAS BEEN REPORTED THUS FAR AND AN
ADDITIONAL INCH OR TWO IS LIKELY ACROSS NORTHEAST
CONNECTICUT...NORTHWEST RHODE ISLAND AND SOUTHERN WORCESTER COUNTY
THROUGH ABOUT NOON.

THE SNOW WAS ENDING ACROSS HARTFORD COUNTY AND THE WESTERN PART OF
HAMPDEN COUNTY WHILE MODERATE TO HEAVY SNOW CONTINUED ACROSS
NORTHEAST CONNECTICUT...NORTHWEST RHODE ISLAND AND SOUTHERN WORCESTER
COUNTY. SNOW WILL END ACROSS NORTHEAST CONNECTICUT BY ABOUT 1130 AM
AND SHOULD EXIT NORTHWEST RHODE ISLAND AND SOUTHERN WORCESTER COUNTY
BETWEEN 1130 AM AND 1230 PM.

ANOTHER STRONG WEATHER DISTURBANCE WAS PRODUCING THUNDERSNOW ACROSS
NORTHEAST PENNSYLVANIA AND NORTHERN NEW JERSEY LATE THIS MORNING.
LATEST INDICATIONS ARE THAT THIS SYSTEM MAY PASS JUST SOUTH OF THE
ADVISORY AREA THIS AFTERNOON. SHOULD THIS TREND CONTINUE...THIS SNOW
ADVISORY MAY BE CANCELED EARLY THIS AFTERNOON.

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

$$

DRV

000 
WWUS41 KBOX 051634
WSWBOX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE TAUNTON MA
1234 PM EDT WED APR 5 2006

...PERIODS OF LOCALLY HEAVY SNOW TO CONTINUE FROM NORTHWEST RHODE
ISLAND THROUGH THE MERRIMACK VALLEY...

CTZ002>004-MAZ008>011-051745-
/O.CAN.KBOX.SN.Y.0004.000000T0000Z-060405T2200Z/
HARTFORD CT-TOLLAND CT-WINDHAM CT-WESTERN HAMPSHIRE MA-
WESTERN HAMPDEN MA-EASTERN HAMPSHIRE MA-EASTERN HAMPDEN MA-
INCLUDING THE CITIES OF...HARTFORD...WINDSOR LOCKS...UNION...
VERNON...PUTNAM...WILLIMANTIC...CHESTERFIELD...BLANDFORD...
AMHERST...NORTHAMPTON...SPRINGFIELD
1234 PM EDT WED APR 5 2006

...SNOW ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS CANCELED THE SNOW
ADVISORY FOR HARTFORD...TOLLAND...WINDHAM...HAMPDEN AND HAMPSHIRE
COUNTIES.

ACCUMULATING SNOW HAS ENDED ACROSS NORTHERN CONNECTICUT AND SOUTHWEST
MASSACHUSETTS. WHILE SOME SNOW SHOWERS ARE POSSIBLE THIS
AFTERNOON...ACCUMULATING SNOW HAS ENDED. THIS FAST MOVING SYSTEM
PRODUCED 2 TO 4 INCHES OF SNOW ACROSS THE REGION.

$$

MAZ005-006-052200-
/O.EXA.KBOX.SN.Y.0004.000000T0000Z-060405T2200Z/
CENTRAL MIDDLESEX MA-WESTERN ESSEX MA-
INCLUDING THE CITIES OF...FRAMINGHAM...LOWELL...LAWRENCE
1234 PM EDT WED APR 5 2006

...SNOW ADVISORY IN EFFECT UNTIL 6 PM EDT THIS AFTERNOON...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A SNOW
ADVISORY...WHICH IS IN EFFECT UNTIL 6 PM EDT THIS AFTERNOON. 

DEVELOPING LOW PRESSURE ALONG THE SOUTHERN NEW ENGLAND COAST WILL
CONTINUE TO PRODUCE A BAND OF MODERATE TO HEAVY SNOW ACROSS PARTS OF
WESTERN ESSEX AND MIDDLESEX COUNTIES THROUGH THE LATE AFTERNOON.
WHILE INTENSITY OF THE SNOW WILL VARY ACROSS THESE COUNTIES...
LOCALIZED HEAVIER SNOW WILL LEAVE AN ACCUMULATION RANGING FROM 2 TO
AS MUCH AS 5 INCHES. HEAVIEST SNOWFALL IS LIKELY ON GRASSY SURFACES
AND OVER THE HILLY TERRAIN. A RUMBLE OF THUNDER IS POSSIBLE AS WELL.
ROAD CONDITIONS WILL VARY WITH THE INTENSIFY OF THE SNOW. UNTREATED
SURFACES WILL BE SNOW AND SLUSH COVERED.

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

$$

MAZ012-RIZ001-052200-
/O.CON.KBOX.SN.Y.0004.000000T0000Z-060405T2200Z/
SOUTHERN WORCESTER MA-NORTHWEST PROVIDENCE RI-
INCLUDING THE CITIES OF...MILFORD...WORCESTER...FOSTER...
SMITHFIELD
1234 PM EDT WED APR 5 2006

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 6 PM EDT THIS
AFTERNOON...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 6 PM EDT THIS AFTERNOON. 

DEVELOPING LOW PRESSURE ALONG THE SOUTHERN NEW ENGLAND COAST WILL
CONTINUE TO PRODUCE PERIODS OF WET SNOW ACROSS NORTHWEST PROVIDENCE
COUNTY AND SOUTHERN WORCESTER COUNTY THROUGH MID AFTERNOON. THE
SOUTHWEST EDGE OF A BAND OF HEAVY SNOW WAS AFFECTING EXTREME NORTHERN
RHODE ISLAND AND SOUTHERN WORCESTER COUNTY...FROM NORTHERN
BURRILLVILLE NORTH THROUGH...DOUGLAS...UXBRIDGE AND GRAFTON. 

THUS FAR ACCUMULATIONS OF 2 TO 3.5 INCHES HAVE BEEN REPORTED AND AN
ADDITIONAL 1 TO 3 INCHES IS POSSIBLE BEFORE THE SNOW TAPERS TO SNOW
AND RAIN SHOWERS DURING THE MID AFTERNOON. HEAVIEST ACCUMULATIONS
WILL FALL OVER THE HILLY TERRAIN.

UNTREATED ROADWAYS WILL REMAIN SLUSH AND SNOW COVERED. MOTORISTS
SHOULD ALLOW SOME EXTRA TIME FOR TRAVEL.

$$

DRV

000 
WWUS41 KBOX 051920
WSWBOX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE TAUNTON MA
320 PM EDT WED APR 5 2006

...PERIODS OF LOCALLY HEAVY SNOW TO CONTINUE FROM NORTHWEST RHODE
ISLAND THROUGH THE MERRIMACK VALLEY...

MAZ012-RIZ001-052030-
/O.CAN.KBOX.SN.Y.0004.000000T0000Z-060405T2200Z/
SOUTHERN WORCESTER MA-NORTHWEST PROVIDENCE RI-
INCLUDING THE CITIES OF...MILFORD...WORCESTER...FOSTER...
SMITHFIELD
320 PM EDT WED APR 5 2006

...SNOW ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS CANCELLED THE SNOW
ADVISORY FOR NORTHWEST PROVIDENCE AND SOUTHERN WORCESTER COUNTIES.

ACCUMULATING SNOW HAS ENDED.

$$

MAZ005-006-052200-
/O.CON.KBOX.SN.Y.0004.000000T0000Z-060405T2200Z/
CENTRAL MIDDLESEX MA-WESTERN ESSEX MA-
INCLUDING THE CITIES OF...FRAMINGHAM...LOWELL...LAWRENCE
320 PM EDT WED APR 5 2006

...SNOW ADVISORY REMAINS IN EFFECT UNTIL 6 PM EDT THIS
AFTERNOON...

A SNOW ADVISORY REMAINS IN EFFECT UNTIL 6 PM EDT FOR CENTRAL
MIDDLESEX AND WESTERN ESSEX COUNTIES.

SNOW WILL SLOWLY DIMINISH THROUGH EARLY THIS EVENING...AND WILL BE
MOST PERSISTENT NEAR THE INTERSTATE 495 CORRIDOR WHERE ANOTHER INCH
OF SNOW IS EXPECTED THROUGH 6 PM.

EVENING COMMUTERS SHOULD BE PREPARED FOR LOCALLY POOR VISIBILITY.
ALTHOUGH MAIN ROADWAYS WILL BE WET...SOME SECONDARY ROADS MAY BE
SLUSH COVERED AND SLIPPERY IN SPOTS. ALLOW SOME EXTRA TRAVEL TIME.

$$

JWD

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TAUNTON MA
450 AM EDT WED APR 5 2006

.SHORT TERM /TODAY THROUGH THURSDAY/...
LOW PRESSURE WHICH BROUGHT RAINFALL EARLIER TUESDAY WAS CENTERED
OVER EASTERN MAINE EARLY THIS MORNING. MEANWHILE A SECONDARY SHORT
WAVE DISTURBANCE WAS CROSSING PENNSYLVANIA. THIS SHORT WAVE IS
EXPECTED TO CROSS SOUTHERN NEW ENGLAND THIS AFTERNOON. THE RADAR
MOSAIC WAS INDICATING A CONCENTRATED AREA OF RAIN AND SNOW SHOWERS
ENTERING SOUTHERN NEW ENGLAND FROM SOUTHEASTERN NEW YORK AND NEW
JERSEY. MUCH OF THE FORCING MECHANISMS ARE DYNAMICALLY DRIVEN AT
THIS TIME FROM THE 700 MILLIBAR THROUGH 500 MILLIBAR LEVELS...
STRONG POSITIVE VORTICITY ADVECTION AND AN INCREASING MID LEVEL
JET AT 700 MILLIBARS. HOWEVER THERE IS A WEAK LOW LEVEL SOUTHERLY
JET AROUND 25 KT WHICH WILL WORK TO ENHANCE PRECIPITATION COVERAGE
ALONG THE SOUTH COAST THIS MORNING. THE UPPER LEVEL DISTURBANCE
IS EXPECTED TO DEEPEN AND THE TROUGH TURNS NEGATIVELY TILTED THIS
AFTERNOON. SURFACE LOW PRESSURE WILL DEEPEN AND INTENSIFY SOUTHEAST
OF CAPE COD THIS EVENING. LAPSE RATES BECOME QUITE STEEP THIS
AFTERNOON WITH 500 MILLIBAR TEMPERATURES DROPPING TO MINUS 35
CELCIUS AND 700 MILLIBAR TEMPERATURES DROPPING TO MINUS 15 CELCIUS.
SURFACE HEATING WILL CREATE STEEP LOW LEVEL LAPSE RATES APPROACHING
THE DRY ADIABAT. TOTAL TOTALS RISE INTO THE MID 50S. ADDITIONAL LOW
TOPPED CONVECTION WILL DEVELOP BY MIDDAY ACROSS MOST OF THE AREA.
AN ISOLATED REPORT OF THUNDER WITH SMALL HAIL OR GRAUPEL CANNOT BE
RULED OUT BUT ISOLATED ENOUGH NOT INCLUDE A MENTION AT THIS TIME.
1000-700 MB THICKNESSES COLD ENOUGH TO SUPPORT SNOW ACROSS ALL
SECTIONS THROUGH EARLY THIS EVENING. HOWEVER WARM BOUNDARY LAYER
TEMPS ALONG THE COASTAL PLAIN WILL CAUSE MUCH OF THE SNOW TO CHANGE
TO RAIN OR MELT WHEN REACHING THE SURFACE...AS THE FREEZING LEVEL
SHOULD RISE BETWEEN 1000 TO 2000 FT THIS AFTERNOON. LITTLE IF ANY
ACCUMULATION IS EXPECTED TODAY EXCEPT LOCALLY AN INCH OR TWO ACROSS
INTERIOR HIGH TERRAIN LOCATIONS. LOW PRESSURE AND ITS ASSOCIATED
UPPER LEVEL TROUGH WILL DEPART THE REGION TONIGHT. THE UPPER LEVEL
FLOW BECOMES MORE NEUTRAL (BETWEEN CYCLONIC AND ANTICYCLONIC)
TONIGHT AND THURSDAY. OVERALL USED THE COLDER FWC (NGM) TEMPERATURE
GUIDANCE TO ACCOUNT FOR STEEP LAPSE RATES TODAY. USED A BLEND OF
COLDER FWC/MET(NAM) AND WARMER MAV GUIDANCE TONIGHT AND THURSDAY.
CONTINUED LIKELY POPS BUT SHIFTED FOCUS FURTHER SOUTH AND EAST TO
INCLUDE CONNECTICUT RHODE ISLAND AND EASTERN MASSACHUSETTS TODAY.

&&

.LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/...
SFC RIDGE MOVES ACROSS REGION THU EVNG THEN CLOUDS INCREASE LATER
THU NIGHT AS WAA PATTERN GETS UNDERWAY.  MODELS IN AGREEMENT ON
DECENT SHOT OF ISENTROPIC LIFT MOVING INTO SNE DURING FRI AHEAD OF
WFNT SO WE INCREASED POPS TO LIKELY FOR FRI.  TEMP AND WIND FCST
WILL BE TRICKY ON FRI DUE TO UNCERTAINTY WITH HOW FAR N WFNT WILL
GET.  NAM KEEPS FNT S OF THE COAST WITH ELY FLOW AND COOLER TEMPS
WHILE GFS EVENTUALLY MOVES FNT NWD INTO SNE LATE FRI WITH MILDER
TEMPS AND SW FLOW.  GFS HAS SUPPORT OF CMC GLOBAL/ECMWF AND CLEAR
MAJORITY OF ENSEMBLE MEMBERS SO WE LEANED TOWARD GFS WHICH SUGGESTS
MID 50S IN THE COASTAL PLAIN WITH SW WINDS.  HOWEVER CONFIDENCE IS
BELOW AVERAGE AS FLOW ALOFT IS FLAT AND WE COULD JUST AS EASILY SEE
FNT REMAINING S OF THE COAST.

INITIAL SFC LOW ALONG FRONTAL BOUNDARY MOVES INTO MARITIMES FRI
NIGHT WHICH PUSHES FNT S OF THE COAST.  GFS/CMC GLOBAL AND ECMWF ALL
SHOW SECOND LOW ASSOCD WITH SOUTHERN STREAM SHORTWAVE RIDING NE
ALONG THIS FNT BRINGING ANOTHER SHOT OF RAIN TO MAINLY THE S COAST
DURING SAT.  WE MAINTAINED CHC RA FOR SAT FOR ALL OF SNE ALTHOUGH IT
LOOKS LIKE BEST CHC WILL BE S OF MASS PIKE WITH DRY CONDITIONS TO
THE N.  WITH NLY FLOW IT WILL BE A COOL DAY ON SAT WITH TEMPS MAINLY
IN THE 40S.

FRONTAL BOUNDARY PUSHES SWD SAT NIGHT AS DRYING MOVES N TO S INTO
REGION SETTING US UP FOR A NICE SUNDAY AS HIGH PRESSURE BUILDS INTO
REGION.  BUT TEMPS REMAINING BELOW NORMAL WITH MAXES GENERALLY 45 TO
50.

HIGH PRES REMAINS IN CONTROL MON/TUE WITH MODERATING TREND AND TEMPS
PROBABLY GETTING INTO 60S AWAY FROM THE S COAST BY TUE AS HIGH
SHIFTS TO THE S WITH SW FLOW DEVELOPING.

&&

.AVIATION...
EXPECT SCATTERED MVFR CEILINGS AND VSBYS THROUGH 02Z. VSBYS 2-3SM IN
SHRASN AND CEILINGS 2-3K FT IN HEAVIER BURSTS OF PRECIPITATION.

&&

.MARINE...
SHORT TERM...A SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS CONTINUES
THIS MORNING ACROSS THE OUTER WATERS DUE TO LEFTOVER SOUTHEASTERLY
SWELL. SEAS ARE EXPECTED TO SUBSIDE THIS AFTERNOON. A PERIOD OF
SMALL CRAFT ADVISORY WINDS WITH GUSTS AROUND 25 KT AND WAVES
BUILDING TO 3 TO 6 FT SHOULD OCCUR TONIGHT AS THE LOW INTENSIFIES.

LONG TERM...SWLY LLJ 40-50 KTS MOVES INTO SOUTH COASTAL WATERS
DURING FRI/FRI EVNG BUT LOW LEVEL INVERSION WILL PREVENT STRONGER
GUSTS FROM MIXING DOWN SO WE CAPPED WINDS AT 30 KTS.  WINDS SHIFT TO
THE N LATE FRI NGT/SAT WITH OVERALL DECREASE IN WIND SPEED EXPECTED
WITH WIND GUSTS BELOW 25 KTS.  SEAS WILL PEAK LATE FRI AND FRI NIGHT
ACROSS SOUTHERN WATERS THEN DECREASING SEAS SAT INTO SUN.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...NONE.
MA...NONE.
NH...NONE.
RI...NONE.
MARINE...SMALL CRAFT ADVISORY FOR HAZARDOUS SEAS FOR ANZ250-254-255
     UNTIL 8 AM WEDNESDAY.
&&

SHORT TERM...STRAUSS
LONG TERM...KJC
AVIATION...STRAUSS
MARINE...KJC/STRAUSS

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TAUNTON MA
500 AM EDT WED APR 5 2006

ANZ230>237-250-254-255-CTZ002>004-MAZ002>024-026-NHZ011-012-015-
RIZ001>008-061100-
BARNSTABLE-BLOCK ISLAND-BLOCK ISLAND SOUND-BOSTON HARBOR-BRISTOL-
BUZZARDS BAY-CAPE COD BAY-CENTRAL MIDDLESEX COUNTY-CHESHIRE-
COASTAL WATERS FROM MERRIMACK RIVER MA OUT 25 NM TO PLYMOUTH MA OUT
40 NM-
COASTAL WATERS FROM NANTUCKET MA TO MARTHAS VINEYARD MA TO BLOCK
ISLAND RI TO MONTAUK NY SOUTHEAST TO 20NM-
COASTAL WATERS FROM PROVINCETOWN MA TO CHATHAM MA TO NANTUCKET MA
OUT 20 NM-DUKES-EASTERN ESSEX-EASTERN FRANKLIN-EASTERN HAMPDEN-
EASTERN HAMPSHIRE-EASTERN HILLSBOROUGH-EASTERN KENT-EASTERN NORFOLK-
EASTERN PLYMOUTH-HARTFORD-NANTUCKET-NANTUCKET SOUND-NARRAGANSETT BAY-
NEWPORT-NORTHERN BRISTOL-NORTHERN WORCESTER-
NORTHWEST MIDDLESEX COUNTY-NORTHWEST PROVIDENCE-RHODE ISLAND SOUND-
SOUTHEAST MIDDLESEX-SOUTHEAST PROVIDENCE-SOUTHERN BRISTOL-
SOUTHERN PLYMOUTH-SOUTHERN WORCESTER-SUFFOLK-TOLLAND-VINEYARD SOUND-
WASHINGTON-WESTERN AND CENTRAL HILLSBOROUGH-WESTERN ESSEX-
WESTERN FRANKLIN-WESTERN HAMPDEN-WESTERN HAMPSHIRE-WESTERN KENT-
WESTERN NORFOLK-WESTERN PLYMOUTH-WINDHAM-
500 AM EDT WED APR 5 2006

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHERN NEW
HAMPSHIRE...MASSACHUSETTS...NORTHERN CONNECTICUT...RHODE ISLAND AND
THE ATLANTIC COASTAL WATERS ADJACENT TO SOUTHERN NEW ENGLAND.

.DAY ONE...TODAY AND TONIGHT
SNOW SHOWERS ARE LIKELY TODAY WHICH MAY ACCUMULATE AROUND AN INCH
OVER THE HIGHER ELEVATIONS OF NORTHERN CONNECTICUT...NORTHWEST RHODE
ISLAND AND CENTRAL MASSACHUSETTS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY
A FRONTAL SYSTEM WILL BRING SOME RAIN ON FRIDAY WITH THE POSSIBILITY
OF MORE RAIN SATURDAY...MAINLY NEAR THE SOUTH COAST AS LOW PRESSURE
TRACKS SOUTH OF THE REGION.  OTHERWISE...NO HAZARDOUS WEATHER IS
EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH THURSDAY.
HOWEVER...ANY REPORTS OF SNOW ACCUMULATION OF ONE INCH OR GREATER
WOULD BE APPRECIATED.

KJC