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Mesoscale Discussion 174
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   Mesoscale Discussion 0174
   NWS Storm Prediction Center Norman OK
   1155 PM CST Sun Feb 12 2017

   Areas affected...portions of southern and eastern Maine

   Concerning...Heavy snow 

   Valid 130555Z - 131200Z

   SUMMARY...Heavy snowfall rates (1-2 inches per hour) are expected to
   become more widespread during the overnight period across southern
   and eastern portions of Maine.

   DISCUSSION...Bombogenesis of a Nor'easter east of the New England
   coast is underway as very rapid surface pressure falls occur during
   the 06-12 UTC period as a low deepens from 992 mb to 980 mb.  Very
   strong but intensifying deep-layer upward vertical motion will
   promote increasing snowfall rates across southern and eastern Maine.
   The heaviest snowfall rates are forecast to coincide when mid-level
   forcing maximizes after the end of the discussion period (12-18
   UTC).  Yet, snow to liquid equivalent ratios of at least 12:1 will
   couple with the strengthening ascent and precipitable water and
   yield snowfall rates ranging from near 1 inch per hour around 06 UTC
   to 1-2 inches per hour primarily after 09 UTC.

   ..Smith.. 02/13/2017


   LAT...LON   44967043 45976784 44716680 43517031 44967043 

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