MESOSCALE DISCUSSION 2361
   NWS STORM PREDICTION CENTER NORMAN OK
   0648 AM CST WED NOV 23 2011
   
   AREAS AFFECTED...NRN VT...NRN NH...MAINE
   
   CONCERNING...HEAVY SNOW 
   
   VALID 231248Z - 231745Z
   
   SNOWFALL RATES WILL CONTINUE TO INCREASE ACROSS PARTS OF NEW ENGLAND
   AS A STORM SYSTEM MOVES ENEWD ACROSS THE REGION. SNOWFALL RATES
   COULD EXCEED 1 INCH PER HOUR AND LOCALLY REACH 2 INCHES PER HOUR
   FROM NRN NH ENEWD ACROSS SRN AND CNTRL MAINE THIS MORNING.
   
   A LEAD SHORTWAVE TROUGH IS CURRENTLY MOVING INTO NEW ENGLAND EVIDENT
   ON WATER VAPOR IMAGERY WITH A WELL-DEFINED VORTICITY MAX LOCATED
   ACROSS VERMONT ACCORDING TO RUC ANALYSIS. THIS FEATURE IS
   CONTRIBUTING TO STRONG LARGE-SCALE ASCENT ACROSS NEW ENGLAND WHERE
   ISENTROPIC LIFT IS ALSO INCREASING. THIS COMBINED WITH ONSHORE FLOW
   AND SUB-FREEZING TEMPERATURES IS CREATING CONDITIONS FAVORABLE FOR
   HEAVY SNOWFALL. MODEL FORECASTS MOVE A 50 TO 60 KT LOW-LEVEL JET
   OFFSHORE FROM MA TO AREAS OFFSHORE FROM SERN MAINE. THIS WILL RESULT
   IN AN INCREASE IN WARM ADVECTION AND ISENTROPIC LIFT ACROSS SRN AND
   CNTRL MAINE THIS MORNING. DUE TO THIS AND THE APPROACH OF THE
   SHORTWAVE TROUGH UPSTREAM...SNOWFALL IS EXPECTED TO INTENSIFY WITH
   RATES OF 1 TO 2 INCHES PER HOUR DEVELOPING ENEWD WITH TIME. THE
   HEAVIEST SNOWFALL SHOULD END ACROSS WRN PARTS OF NEW ENGLAND
   BEGINNING AFTER 15Z.
   
   ..BROYLES.. 11/23/2011
   
   
   ATTN...WFO...CAR...GYX...BTV...
   
   LAT...LON   43597056 43557114 43807231 44137259 44497238 45287067
               45636917 45486769 45156721 44766724 44416839 43786990
               43597056