MESOSCALE DISCUSSION 0027
   NWS STORM PREDICTION CENTER NORMAN OK
   1039 AM CST WED JAN 07 2009
   
   AREAS AFFECTED...MUCH OF ME...NH...VT...MA...AND FAR EASTERN NY
   
   CONCERNING...WINTER MIXED PRECIPITATION 
   
   VALID 071639Z - 072245Z
   
   FREEZING RAIN IS EXPECTED ACROSS MUCH OF MAINE...NEW
   HAMPSHIRE...VERMONT...MASSACHUSETTS AND FAR EASTERN NEW YORK THIS
   AFTERNOON. HOURLY RATES OF 0.05-0.10 ARE EXPECTED...WITH LOCALLY
   HIGHER RATES OF 0.20 IN/HR.
   
   A 186 KT JET STREAK AT 250 MB SAMPLED BY THE 12Z BNA RAOB WILL
   CONTINUE APPROACHING NEW ENGLAND THROUGH THE AFTERNOON...AMPLIFYING
   DOWNSTREAM RIDGE. THIS WILL RESULT IN STRENGTHENING UPR LVL
   DIVERGENCE ACROSS THE REGION...FAVORING WIDESPREAD PRECIPITATION. IN
   ADDITION...SHORT TERM MODEL GUIDANCE INDICATES STRONG LOW LVL WAA
   BECOMING FOCUSED ACROSS VT/NH INTO ME...WHICH WILL FURTHER ENHANCE
   PRECIPITATION RATES. AT THE SURFACE...SECONDARY CYCLOGENESIS WILL
   CONTINUE OFF THE NEW ENGLAND COAST...MAINTAINING SURFACE WIND
   TRAJECTORIES PARALLEL TO SHORELINE AND ALLOWING SUBFREEZING AIRMASS
   TO PERSIST. 
   
   ATOP THE COLD SFC AIRMASS...ELEVATED WARM NOSE WILL ADVANCE NORTH
   THROUGH THE REGION DURING THE AFTERNOON...FIRST ACROSS MA AND
   SOUTHERN VT/NH...AND THEN SOUTHERN/EASTERN ME BETWEEN 21-00Z. WHILE
   A SNOW/SLEET MIX MAY INITIALLY BE OBSERVED OVER CENTRAL NH AND
   ME...THE MORE SIGNIFICANT WINTER WEATHER THREAT WILL BE FREEZING
   RAIN...WITH THE GREATEST HOURLY RATES /0.10 IN PER HR/ OVER SOUTHERN
   VT/NH INTO SOUTHERN/EASTERN ME. CLOSER TO THE COAST...LOCALLY HIGHER
   RATES OF 0.20 IN/HR MAY BE OBSERVED.
   
   ..GARNER.. 01/07/2009
   
   
   ...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...BOX...BTV...ALY...
   
   LAT...LON   44536714 44166828 43626952 43007069 42377172 42147250
               42187343 42557436 43917462 44787385 45007322 45127156
               45237139 45766976 46106878 45966781 45106696 44536714