MESOSCALE DISCUSSION 0004
   NWS STORM PREDICTION CENTER NORMAN OK
   0643 AM CST MON JAN 01 2007
   
   AREAS AFFECTED...ERN NH AND ME
   
   CONCERNING...FREEZING RAIN 
   
   VALID 011243Z - 011845Z
   
   FREEZING RAIN...MIXED AT TIMES WITH SLEET...WILL CONTINUE THIS
   MORNING.  HOURLY RATES OF UP TO .05-.07" WILL BE POSSIBLE WITH
   PRECIPITATION ENDING FROM WEST TO EAST ACROSS REGION.
   
   INTENSE...SHORT WAVE TROUGH WAS LIFTING NEWD THROUGH THE LOWER GREAT
   LAKES THIS MORNING WITH ASSOCIATED...DOWNSTREAM WARM CONVEYOR BELT
   SUPPORTING LARGE PRECIPITATION SHIELD FROM THE DELMARVA NEWD THROUGH
   THE LOWER HUDSON VALLEY AND MUCH OF NEW ENGLAND.  INDEED...REGIONAL
   VWPS INDICATE STRONG LLJ OF 50-60 KTS WHICH IS DRIVING INTENSE WAA
   REGIME THROUGH THE LOWER HUDSON VALLEY INTO CNTRL/NRN NEW ENGLAND.
   
   THIS WAA ATOP SUB-FREEZING SURFACE TEMPERATURES HAS RESULTED IN A
   FAIRLY WIDESPREAD AREA OF FREEZING RAIN EARLY THIS MORNING WITH
   EARLIER OBSERVATIONS FROM INTERIOR MA NWD INTO PORTIONS OF VT/NH
   INDICATING RATES OF .05-.07"/HR.  EXPECT SIMILAR TRENDS TO CONTINUE
   THROUGH THE REMAINDER OF THE MORNING FROM PORTIONS OF E-CNTRL/NRN NH
   INTO ME.  PRECIPITATION MAY CHANGE TO RAIN /NAMELY ACROSS CNTRL AND
   SRN NH/...PRIOR TO DIMINISHING FROM WEST TO EAST ACROSS REGION AS
   SYSTEM DRY SLOT SHIFTS EWD.
   
   BASED ON 12Z GYX SOUNDING...INTENSE VERTICAL MOTION ASSOCIATED WITH
   THE LOW-LEVEL WAA REGIME MAY OFFSET LAYER WARMING AND SUFFICIENTLY
   COOL 850-700MB WARM NOSE TO SUPPORT A MIX OF SLEET AND FREEZING
   RAIN...ESPECIALLY ACROSS PORTIONS OF ME.
   
   ..MEAD.. 01/01/2007
   
   
   ...NOTICE...
   SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A
   SCHEDULED BASIS FROM DECEMBER 1 THROUGH FEBRUARY 28...FOUR
   TIMES A DAY...AROUND 00 UTC...06 UTC...12 UTC...AND 18 UTC
   FOR SIGNIFICANT SHORT RANGE WINTER WEATHER EVENTS.
   
   ATTN...WFO...CAR...GYX...
   
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