MESOSCALE DISCUSSION 0165
   NWS STORM PREDICTION CENTER NORMAN OK
   0718 AM CST SUN FEB 17 2013
   
   AREAS AFFECTED...FAR SERN NH/ERN MA
   
   CONCERNING...HEAVY SNOW 
   
   VALID 171318Z - 171715Z
   
   SUMMARY...SNOWFALL RATES OF ONE INCH PER HOUR ARE EXPECTED ACROSS A
   SMALL PORTION OF SERN NEW ENGLAND OVER THE NEXT FEW HOURS.
   
   DISCUSSION...LATEST RADAR IMAGERY SHOWS A BAND OF MODERATE TO
   LOCALLY HEAVY SNOWFALL ALIGNED ROUGHLY N-S FROM SERN NH SWD ACROSS
   ERN MA...WITHIN A ZONE OF CONCENTRATED ASCENT ON THE WRN FRINGE OF
   AN UPPER LOW AND ASSOCIATED STORM SYSTEM OFF THE NEW ENGLAND COAST
   MOVING NNEWD WITH TIME.  DRY AIR AT THE SURFACE THAT CONTINUES
   FILTERING IN FROM THE NW WILL LIMIT THE WRN FRINGE OF THE SNOW BAND.
    HOWEVER...AREAS OVER ERN MA AND ADJACENT SERN NH AND POSSIBLY SRN
   ME -- WHERE STRONG LOW-LEVEL WARM ADVECTION IS ONGOING ON THE NRN
   FRINGE OF THE CENTER OF LOW-LEVEL CIRCULATION -- WILL LIKELY
   EXPERIENCE PERSISTENT SNOWFALL WITH RATES LOCALLY ONE INCH PER HOUR
   OVER A FEW HOUR PERIOD.  LATEST SREF FORECASTS SUPPORT THIS
   SCENARIO...WITH A SMALL AREA OF INCH-PER-HOUR SNOWFALL RATES
   CONCENTRATED OVER ERN MA BETWEEN NOW AND ROUGHLY 17Z.  WHILE THE
   AREA OF HEAVIEST SNOW AT THIS TIME DOES NOT INCLUDE CAPE
   COD...PIVOTING OF THE BAND IS EXPECTED IN TIME AS THE STORM SYSTEM
   MOVES NNEWD.  THIS SHOULD RESULT IN HEAVY SNOW OVERSPREADING THE
   CAPE AND OFFSHORE ISLANDS FROM THE W...BEFORE THE HEAVIEST
   PRECIPITATION EVENTUALLY SHIFTS E.
   
   ..GOSS.. 02/17/2013
   
   
   ATTN...WFO...GYX...BOX...
   
   LAT...LON   41297120 42197119 43197081 43017037 42487031 41986997
               41366978 41167016 41097111 41297120