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Mesoscale Discussion 47
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   MESOSCALE DISCUSSION 0047
   NWS STORM PREDICTION CENTER NORMAN OK
   0858 PM CST FRI JAN 30 2015

   AREAS AFFECTED...DOWN EAST MAINE VICINITY

   CONCERNING...HEAVY SNOW 

   VALID 310258Z - 310900Z

   SUMMARY...SNOWFALL RATES INCREASING TO 1" PER HOUR EXPECTED ACROSS
   THE DOWN EAST ME VICINITY AND ADJACENT PORTIONS OF
   CANADA...PERSISTING THROUGH THE EARLY MORNING HOURS.

   DISCUSSION...LATEST SURFACE ANALYSIS REVEALS A LOW DEEPENING OFF THE
   ME COAST ATTM...WITH AN INVERTED TROUGH EXTENDING NWD ACROSS ERN ME.
    THIS IS OCCURRING IN RESPONSE TO THE CONTINUED EWD PROGRESSION OF
   THE SHARP/COMPLEX UPPER TROUGH CROSSING THE NERN STATES ATTM. 
   MODELS CONTINUE TO FOCUS INCREASING QG ASCENT ACROSS THE DOWN EAST
   ME VICINITY AND INTO ADJACENT AREAS OF THE CANADIAN MARITIMES...AS
   THE OFFSHORE SURFACE LOW -- AND ZONE OF WARM ADVECTION ON ITS NRN
   PERIPHERY -- STRENGTHENS AND REMAINS QUASI-STATIONARY OVER THE NEXT
   SEVERAL HOURS.  AS ASCENT INCREASES...A ZONE OF MODERATE TO HEAVY
   SNOWFALL -- NOW BEGINNING TO DEVELOP OVER THE AREA PER LATEST RADAR
   IMAGERY -- IS EXPECTED TO EXPAND/PERSIST ACROSS THE DISCUSSION AREA
   INTO THE OVERNIGHT HOURS.  HIGH-RES MODELS CONFIRM THIS SCENARIO --
   MOST OF WHICH ARE REMARKABLY CONSISTENT IN DEPICTING THIS ZONE OF
   SUSTAINED HEAVY SNOWFALL ACROSS THE DISCUSSION AREA -- BECOMING
   MAXIMIZED AFTER MIDNIGHT.

   ..GOSS.. 01/31/2015


   ATTN...WFO...CAR...GYX...

   LAT...LON   43706945 44426939 45366866 45816838 45836776 45596724
               44696683 43706945 

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Page last modified: January 31, 2015
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