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Mesoscale Discussion 55
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   MESOSCALE DISCUSSION 0055
   NWS STORM PREDICTION CENTER NORMAN OK
   0748 AM CST MON FEB 02 2015

   AREAS AFFECTED...PORTIONS OF CNTRL/WRN MAINE...NRN NH...NERN VT

   CONCERNING...HEAVY SNOW 

   VALID 021348Z - 021845Z

   SUMMARY...AREAS OF HEAVY SNOW WITH SNOWFALL RATES OF 1 INCH PER HOUR
   WILL CONTINUE SPREADING ENEWD ACROSS INTERIOR NEW ENGLAND THROUGH
   MID-DAY.

   DISCUSSION...MOSAIC RADAR IMAGERY INDICATES A BROAD SHIELD OF
   PRECIPITATION STRETCHING FROM NY AND ERN PA TO SRN NEW
   ENGLAND...WITH SFC OBSERVATIONS INDICATING MODERATE TO HEAVY SNOW
   ONGOING. THE 12Z ALB RAOB SAMPLED MARKEDLY VERTICALLY VEERING WINDS
   WITH HEIGHT IN THE LOWER TROPOSPHERE -- INDICATIVE OF STRONG WAA IN
   PLACE SUPPORTING THE AFOREMENTIONED PRECIPITATION. AS CONVERGENCE AT
   THE TERMINUS OF THE WAA-ENCOURAGED LLJ TRANSLATES ENEWD THIS
   MORNING...IN TANDEM WITH THE PROGRESSION OF A SFC CYCLONE PRESENTLY
   ANALYZED OVER NW PA/SW NY...HEAVY SNOW WILL ALSO SPREAD ENEWD.
   STRENGTHENING FRONTOGENETIC CIRCULATIONS WILL FURTHER ENCOURAGE THE
   MAINTENANCE/INTENSIFICATION OF PRECIPITATION ACROSS THE REGION. THE
   OBSERVED ALB SOUNDING AND RAP FORECAST SOUNDINGS ACROSS MUCH OF THE
   DISCUSSION AREA INDICATE LOWER/MIDDLE-TROPOSPHERIC TEMPERATURES
   GENERALLY COLDER THAN -10C. ASSOCIATED DEEP DENDRITIC GROWTH ZONES
   AND LARGE SNOW-TO-LIQUID RATIOS WILL SUPPORT SNOWFALL RATES OF 1
   INCH PER HOUR ACROSS THE DISCUSSION AREA...WHEREAS MORE ROBUST
   ASCENT AND HIGHER SNOWFALL RATES WILL OCCUR IN CLOSER PROXIMITY TO
   THE COAST -- REF. SWOMCD 0054. THE HEAVY SNOW WILL CONTINUE ACROSS
   THE DISCUSSION AREA INTO THE AFTERNOON.

   ..COHEN.. 02/02/2015


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

   LAT...LON   45197121 45767013 45916885 45416806 45016811 44816946
               44407060 44157122 43867183 44127202 44797193 45197121 

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Page last modified: February 02, 2015
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