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Mesoscale Discussion 17
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   MESOSCALE DISCUSSION 0017
   NWS STORM PREDICTION CENTER NORMAN OK
   0718 PM CST SAT JAN 03 2015

   AREAS AFFECTED...PORTIONS OF NORTHERN VT/NH INTO WESTERN AND CENTRAL
   ME

   CONCERNING...WINTER MIXED PRECIPITATION 

   VALID 040118Z - 040715Z

   SUMMARY...MODERATE TO LOCALLY HEAVY SNOW WILL CONTINUE ACROSS
   PORTIONS OF VT/NH THIS EVENING AND SPREAD EAST/NORTHEAST ACROSS ME.
   SNOWFALL RATES MAY APPROACH 1 INCH PER HOUR AT TIMES BEFORE A
   GRADUAL TRANSITION TO SLEET AND FREEZING RAIN OCCURS OVERNIGHT.

   DISCUSSION...A STRONG 50-70 KT SOUTHWESTERLY 700 MB JET WILL
   CONTINUE TO TRANSPORT MOISTURE NORTHEAST TONIGHT AND RESULT IN
   WARMING MIDLEVEL TEMPERATURES LATE THIS EVENING INTO THE OVERNIGHT
   HOURS. STRONG DEEP LAYER FORCING FOR ASCENT ASSOCIATED WITH
   APPROACHING UPPER TROUGH WILL MAINTAIN MODERATE TO LOCALLY HEAVY
   SNOW RATES AS PRECIPITATION SPREADS EAST/NORTHEAST ACROSS NH/VT INTO
   ME. MIDLEVEL TEMPERATURES WILL BEGIN TO WARM ATOP BELOW FREEZING
   BOUNDARY LAYER AND A TRANSITION TO SLEET AND FREEZING RAIN WILL
   OCCUR FIRST ACROSS NH/VT INTO FAR SOUTHWEST ME BY 06-09Z. HEAVIER
   SNOWFALL WILL CONTINUE ACROSS MUCH OF MAINE THROUGH THE OVERNIGHT
   HOURS...BUT MAY BECOME MIXED WITH SLEET OR TRANSITION TO FREEZING
   RAIN AFTER 09Z. WHERE A TRANSITION TO FREEZING RAIN OCCURS...RATES
   UP TO 0.05 IN/HR ARE POSSIBLE.

   ..LEITMAN.. 01/04/2015


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

   LAT...LON   45247161 45647099 46217001 46286934 45866860 45416827
               44906825 44606841 44306895 44056939 43847004 43507065
               43437119 43537164 43747193 44237201 44587208 44907196
               45247161 

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Page last modified: January 04, 2015
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