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Mesoscale Discussion 1956
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MD 1956 graphic

   MESOSCALE DISCUSSION 1956
   NWS STORM PREDICTION CENTER NORMAN OK
   1050 AM CST WED NOV 26 2014

   AREAS AFFECTED...PARTS OF ERN PA...SERN NY...FAR NWRN NJ...NWRN
   CT...WRN AND CENTRAL MA...SRN VT AND SRN NH

   CONCERNING...HEAVY SNOW 

   VALID 261650Z - 262115Z

   SUMMARY...HEAVY SNOWFALL RATES /AT LEAST 1 INCH PER HOUR/ ARE
   EXPECTED TO PERSIST WITHIN A 70-90 MILE WIDE CORRIDOR FROM ERN PA
   THROUGH SERN NY TO WRN/CENTRAL MA AND DEVELOP INTO SRN VT/NH THIS
   AFTERNOON.

   DISCUSSION...TRENDS IN SURFACE OBSERVATIONS INDICATED RAPID COOLING
   HAS ALREADY OCCURRED FROM NERN PA TO WRN MA...LIKELY DUE TO WET-BULB
   EFFECTS AND THE DEVELOPMENT OF HEAVY PRECIPITATION RATES FROM SW-NE.
    SURFACE WET-BULB TEMPERATURES ARE EXPECTED TO FALL TO AT OR BELOW
   32 ACROSS THE REST OF CENTRAL MA AND SRN NH THIS AFTERNOON.

   FORCING FOR ASCENT WILL INCREASE FROM SW-NE ACROSS THE DISCUSSION
   AREA ALONG THE TRACK OF A SHORTWAVE TROUGH EJECTING NEWD FROM THE
   SRN APPALACHIANS.  FORECAST SOUNDINGS SUGGEST STRONG UVVS SHOULD
   OCCUR WITHIN THE DENDRITIC GROWTH ZONE...WHILE FURTHER ENHANCEMENT
   TO SNOWFALL RATES MAY RESULT FROM AGGREGATE PROCESSES WITHIN AN
   ISOTHERMAL LAYER AT LOW LEVELS.

   ..PETERS.. 11/26/2014


   ATTN...WFO...GYX...BOX...BTV...OKX...ALY...PHI...BGM...CTP...
   LWX...

   LAT...LON   40687528 39777645 39707692 39847738 40287740 41197692
               42197586 42547514 43397299 43887097 42927151 42437190
               42087280 41477394 40687528 

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Page last modified: November 26, 2014
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