MESOSCALE DISCUSSION 2517
   NWS STORM PREDICTION CENTER NORMAN OK
   1149 AM CST TUE DEC 07 2004
   
   AREAS AFFECTED...ERN NY / NH / VT / NRN MA / SRN ME
   
   CONCERNING...FREEZING RAIN AND SLEET 
   
   VALID 071749Z - 072345Z
   
   PRECIPITATION RATES WILL INCREASE OVER THE NEXT SEVERAL HOURS. 
   SIGNIFICANT ICING WILL BE POSSIBLE OVER SRN VT/NH...WITH HEAVY SLEET
    FARTHER N.  HRLY RATES OF ICING EXPECTED TO BE BETWEEN 0.05" -
   0.10" FOR 3-5 HRS.
   
   WARM MOIST AIR WILL CONTINUE TO FEED NWD AHEAD OF DEVELOPING LOW
   PRESSURE CENTER FARTHER W.  AS THIS SYSTEM DEVELOPS NEWD...BROAD W-E
   BAND OF FRONTOGENETIC FORCING WILL INCREASE ALONG WITH PRECIPITATION
   RATES. SUB FREEZING SURFACE AIR MASS IS ALREADY IN PLACE OVER MUCH
   OF NEW ENGLAND...WITH NEAR FREEZING TEMPERATURES OVER ERN NY AND
   SWRN MA.  STRONG WARM ADVECTION JUST ABOVE THE SURFACE WILL
   THEREFORE ALLOW FOR FREEZING RAIN PROFILES TO DEVELOP...WITH SLEET
   FARTHER NE WHERE COLD AIR IS DEEPER.
   
   WHILE OCCASIONAL FREEZING PRECIPITATION WILL OCCUR OVER ERN NY AND
   MA...MOST OF THESE AREAS WILL CHANGE TO RAIN.  THE HEAVIEST ICING IS
   EXPECTED TO BE IN THE LOWEST ELEVATIONS OF SRN VT AND SRN NH...WHERE
   SURFACE TEMPERATURES WILL REMAIN BELOW FREEZING THE LONGEST.
   
   ..JEWELL.. 12/07/2004
   
   
   ...NOTICE...
   SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A 
   SCHEDULED BASIS...FOUR TIMES A DAY...BETWEEN 05-06 UTC...
   11-12 UTC...17-18 UTC...AND 23-00 UTC AS SIGNIFICANT SHORT
   RANGE WINTER WEATHER EVENTS UNFOLD.  THIS SCHEDULE WILL BE
   USED FROM DECEMBER 1 THROUGH FEBRUARY 28 TO ALLOW PARTNERS
   AND USERS TO BETTER ANTICIPATE THE TIMING OF SPC WINTER WEATHER
   MESOSCALE DISCUSSIONS.
   
   ATTN...WFO...GYX...BOX...BTV...ALY...
   
   42907092 42717112 42367171 42317232 42507318 42567354
   42717407 43187475 43517478 43997447 44347411 44697358
   44957331 45057281 45027192 44807142 43876999 43287078