MESOSCALE DISCUSSION 0142
   NWS STORM PREDICTION CENTER NORMAN OK
   1136 AM CST FRI FEB 25 2011
   
   AREAS AFFECTED...E-CNTRL VT / CNTRL NH / LARGE PART OF THE SERN HALF
   OF MAINE
   
   CONCERNING...HEAVY SNOW 
   
   VALID 251736Z - 252130Z
   
   HEAVY SNOWFALL RATES EXCEEDING 1 INCH PER HOUR THIS AFTERNOON WILL
   LIKELY OCCUR FROM PORTIONS OF E-CNTRL VT NEWD INTO ERN MAINE.  A
   CHANGEOVER FROM SNOW TO MIXED P-TYPE IS POSSIBLE ALONG COASTAL
   MAINE.
   
   MIDDAY WATER VAPOR IMAGERY SHOWS AN UPPER LEVEL WAVE PROGRESSING
   ACROSS PA TOWARDS NY WITH AN ATTENDANT MID-LEVEL DRY SLOT IMPINGING
   NEWD TOWARDS NEW ENGLAND.  AT THE SURFACE...A DEEPENING CYCLONE
   INVOF NYC-LOWER HUDSON VALLEY WILL DEVELOP NEWD OFF THE COAST
   BETWEEN CAPE COD AND NOVA SCOTIA BY 21Z.  A REDUCTION IN LOW LEVEL
   STATIC STABILITY DUE IN PART TO THE APPROACHING PV-ANOMALY FROM THE
   SW COMBINED WITH FRONTOGENESIS IN THE H85-H7 LAYER SUPPORT WILL
   SUPPORT ENHANCED PRECIP RATES THROUGH MID AFTERNOON.  AFOREMENTIONED
   MID-LEVEL DRY SLOT IS FORECAST TO MOVE NEWD INTO THE REGION THROUGH
   00Z AND FIRST AFFECT THE SWRN HALF OF THE AREA BY 21Z.  THIS WILL
   COINCIDE WITH A WEAKENING IN THE HEAVIEST SNOWFALL RATES /I.E. 1
   INCH PER HOUR/.  FARTHER E OVER THE IMMEDIATE COASTAL AREAS...SOME
   FORECAST SOUNDINGS SHOW LOW LEVEL THERMAL PROFILES GRADUALLY
   SUPPORTING THE POSSIBILITY OF A CHANGEOVER FROM PRIMARILY SNOW TO
   MIXED P-TYPE.
   
   ..SMITH.. 02/25/2011
   
   
   ATTN...WFO...CAR...GYX...BTV...
   
   LAT...LON   44866699 44286919 43197153 43457264 43997250 45446971
               45906786 44866699