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Mesoscale Discussion 1906
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   MESOSCALE DISCUSSION 1906
   NWS STORM PREDICTION CENTER NORMAN OK
   1102 PM CST SUN NOV 09 2014

   AREAS AFFECTED...NRN SD THROUGH SRN ND INTO EXTREME WCNTRL MN

   CONCERNING...HEAVY SNOW 

   VALID 100502Z - 101000Z

   SUMMARY...BANDS OF MODERATE TO HEAVY SNOW ARE EXPECTED TO PERSIST
   AND BECOME BETTER ORGANIZED FROM SRN ND THROUGH NRN SD AND EXPAND
   EWD THROUGH THE EARLY MORNING. SNOWFALL RATES FROM 0.5 TO 1 INCH PER
   HOUR ARE LIKELY.

   DISCUSSION...A SLY LLJ WILL INCREASE THROUGH THE EARLY MORNING FROM
   ERN NEB TO ERN SD WITHIN ZONE OF HEIGHT FALLS AHEAD OF PROGRESSIVE
   SHORTWAVE TROUGH CURRENTLY MOVING SEWD THROUGH THE NRN ROCKIES.
   INCREASING LLJ AND STRENGTHENING THERMAL GRADIENT BETWEEN A LARGE
   AREA OF CP HIGH PRESSURE OVER SWRN CANADA AND A SFC LOW OVER THE
   CNTRL HIGH PLAINS WILL CONTRIBUTE TO A GRADUAL INCREASE IN LOW TO
   MID-LEVEL ASCENT FROM NRN SD TO SRN ND. MEANWHILE DEEPER FORCING
   ACCOMPANYING THE PROGRESSIVE SHORTWAVE TROUGH WILL EVENTUALLY BEGIN
   TO OVERTAKE THE LOW-LEVEL FRONTOGENETIC ZONE...RESULTING IN A
   CORRIDOR OF DEEP ASCENT WHICH SHOULD CONTRIBUTE TO INCREASING
   SNOWFALL RATES THROUGH THE MORNING HOURS. FORECAST SOUNDINGS ALSO
   INDICATE DEVELOPMENT OF NEUTRAL TO WEAKLY-UNSTABLE LAYERS LATER
   TONIGHT BETWEEN 600-400 MB SUGGESTING SNOWFALL RATES COULD AT TIMES
   BE CONVECTIVELY ENHANCED.

   ..DIAL.. 11/10/2014


   ATTN...WFO...MPX...FGF...ABR...BIS...UNR...

   LAT...LON   46250236 46470095 46229668 45349595 44699674 44889814
               45230048 45610261 46250236 

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Page last modified: November 10, 2014
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