MESOSCALE DISCUSSION 2182
   NWS STORM PREDICTION CENTER NORMAN OK
   0546 AM CST MON DEC 03 2007
   
   AREAS AFFECTED...VT/NH/ME
   
   CONCERNING...HEAVY SNOW 
   
   VALID 031146Z - 031445Z
   
   MODERATE TO HEAVY SNOWFALL RATES WILL DEVELOP NEWD INTO ME THIS
   MORNING WITH A CONTINUATION OF SIMILAR SNOWFALL RATES ACROSS MUCH OF
   NH/VT.  THE HIGHEST RATES SHOULD BE IN THE 1 TO 1.5 IN/HR RANGE
   THROUGH 15-18Z.
   
   SATELLITE IMAGERY SHOWED A LEAD SHORT WAVE TROUGH TRACKING NEWD
   ACROSS NEW ENGLAND THIS MORNING FOLLOWED BY A DEEPENING TROUGH
   CURRENTLY CENTERED OVER THE GREAT LAKES/ONTARIO.  ASCENT WITH LEAD
   TROUGH HAS AIDED IN MODERATE TO HEAVY SNOWFALL RATES PRIOR TO 12Z
   ACROSS PARTS OF VT/NH INTO SWRN ME...WITH THESE SNOWFALL RATES
   SPREADING NEWD INTO AT LEAST CENTRAL ME THIS MORNING. 
   MEANWHILE...SEVERAL LOBES OF ASCENT ATTENDANT TO DEEPENING GREAT
   LAKES/ONTARIO TROUGH ARE EXPECTED TO SPREAD ACROSS VT/NH THROUGH 15Z
   AND THEN INTO ME DURING THE LATE MORNING.  THIS WILL SUPPORT PERIODS
   OF MODERATE TO HEAVY SNOWFALL RATES DURING THE NEXT 3-6 HOURS.  
   
   MESOSCALE ANALYSES INDICATED RAPID DEEPENING /2 MB/HR/ OF COASTAL
   SURFACE LOW...LOCATED JUST E OF LONG ISLAND AT 11Z...WITH FURTHER
   INTENSIFICATION EXPECTED AS STRONG HEIGHT FALLS /150-240 METERS/
   SPREAD ENEWD ACROSS NEW ENGLAND AHEAD OF DEEPENING UPPER TROUGH. 
   SURFACE LOW IS EXPECTED TO TRACK NEWD ACROSS SERN MA/CAPE COD AREA
   TOWARD THE GULF OF ME WITH LOW LEVEL WINDS N OF LOW TRACK BACKING
   AND STRENGTHENING THIS MORNING.  RESULTANT INCREASE OF LOW LEVEL
   WAA/ISENTROPIC ASCENT ACROSS ME/NH WILL ENHANCE UPWARD VERTICAL
   MOTION FOR GREATER SNOWFALL RATES.  THE STRONG UVVS WITH THIS SYSTEM
   WILL MAINTAIN COLD THERMODYNAMIC PROFILES ACROSS THIS REGION FOR
   PTYPE TO REMAIN SNOW.
   
   ..PETERS.. 12/03/2007
   
   
   ...NOTICE...
   SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A
   SCHEDULED BASIS FROM DECEMBER 1 THROUGH FEBRUARY 28...FOUR
   TIMES A DAY...AROUND 00 UTC...06 UTC...12 UTC...AND 18 UTC
   FOR SIGNIFICANT SHORT RANGE WINTER WEATHER EVENTS.
   
   ATTN...WFO...CAR...GYX...BOX...BTV...ALY...
   
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   43307281 44127291 44617296 44997258 45057149 45497113
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