NEW: SPC Mesoscale Discussion

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   MESOSCALE DISCUSSION 0001   NWS STORM PREDICTION CENTER NORMAN OK   0743 PM CST THU JAN 02 2014   AREAS AFFECTED...NRN NJ/SERN NY INCLUDING LONG ISLAND/CT/RI/SERN   MA/DOWN EAST ME   CONCERNING...HEAVY SNOW    VALID 030143Z - 030645Z   SUMMARY...A PROLONGED PERIOD OF MODERATE TO HEAVY SNOWFALL IS   FORECAST THROUGH THIS EVENING AND OVERNIGHT FROM PARTS OF NRN NJ   ENEWD ACROSS SRN/ERN NEW ENGLAND.  ADDITIONALLY...BLIZZARD   CONDITIONS MAY DEVELOP OVERNIGHT AS WINDS INCREASE WITH TIME.   DISCUSSION...SNOWFALL RATES OF UP TO -- AND IN LOCAL AREAS EXCEEDING   -- AN INCH PER HOUR ARE FORECAST OVER THE NEXT SEVERAL HOURS ACROSS   THE SRN NEW ENGLAND VICINITY...AS A LARGE UPPER TROUGH CROSSES THE   ERN THIRD OF THE U.S. OVERNIGHT.  AS THE TROUGH ADVANCES EWD...A   SURFACE LOW -- NOW OFF THE COAST OF SERN VA/NERN NC -- IS PROGGED TO   UNDERGO RELATIVELY RAPID CYCLOGENESIS AS IT SHIFTS SLOWLY ENEWD OVER   THE NEXT 6-12 HOURS.     ATTM...THE BAND OF HEAVIEST PRECIPITATION EXTENDS FROM ERN VA --   WHERE A MIX OF RAIN AND SNOW IS OBSERVED -- NEWD ACROSS NJ AND LONG   ISLAND AND INTO SRN CT/RI/SERN MA...WITH MODERATE TO LOCALLY HEAVY   SNOWFALL INDICATED ACROSS THESE AREAS.   LATEST SREF GUIDANCE SUGGESTS THAT THE HEAVIEST BAND OF SNOWFALL   WILL DEVELOP AFTER MIDNIGHT -- FROM THE HUDSON VALLEY EWD ACROSS NRN   CT/MA/SRN VT/SRN NH/SRN ME...INLAND/WELL N OF THE ONGOING HEAVIER   PRECIPITATION.  HOWEVER...HIGH-RES MODELS -- INCLUDING THE   NMM4...THE HRRR...AND A LOCAL NSSL 4KM WRF -- DEPICT THE HEAVIEST   ONSHORE PRECIPITATION TO REMAIN CONFINED TO THE SERN NEW ENGLAND   VICINITY.  THIS IS MUCH MORE IN LINE WITH CURRENT RADAR TRENDS...AND   GIVEN THE SURFACE LOW PROGGED TO TRACK ENEWD AWAY FROM THE COAST   WITH TIME...THE SERN NEW ENGLAND VICINITY REMAINS THE AREA OF   HIGHEST CONFIDENCE FOR SUSTAINED/HEAVY ONSHORE SNOWFALL OVER THE   NEXT SEVERAL HOURS.  IN ADDITION...AS WINDS INCREASE ACROSS THIS   AREA IN CONJUNCTION WITH THE DEEPENING OFFSHORE LOW...BLIZZARD   CONDITIONS ARE EXPECTED IN SOME AREAS ALONG WITH ASSOCIATED REDUCED   VISIBILITY/BLOWING SNOW.   ..GOSS.. 01/03/2014   ATTN...WFO...GYX...BOX...OKX...ALY...PHI...BGM...