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Mesoscale Discussion 166
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   Mesoscale Discussion 0166
   NWS Storm Prediction Center Norman OK
   0355 AM CST Thu Feb 09 2017

   Areas affected...Eastern Pennsylvania into southern New England

   Concerning...Heavy snow 

   Valid 090955Z - 091600Z

   SUMMARY...Snow will increase in intensity as it develops eastward
   across the region with the heaviest rates over 2"/hr from late
   morning into the afternoon. Areas currently experiencing rain from
   New Jersey towards Long Island will turn to heavy snow before noon.
   Snow rates are likely to become even heavier after noon across
   southern New England.

   DISCUSSION...A large area of precipitation persists this morning
   with heavy snow extending across eastern PA and southeast NY. The
   rain/snow line as of 4 AM local time extended from just northwest of
   the Philadelphia area across northern New Jersey to just north of
   Long Island. 

   Moisture and lift will continue to increase across the region as a
   surface low deepens to the south and shifts northeastward. Extreme
   lift and plenty of moisture in the favorable dendritic growth zone
   will maximize heavy snow potential. Any rain should change to all
   snow by early afternoon with 1-2"/hr rates common. Beyond 10 AM and
   east of the MCD area, rates may increase to 3-4"/hr across southern
   New England including the Boston vicinity, peaking between noon and
   4 PM.

   ..Jewell.. 02/09/2017


   LAT...LON   43667137 42777058 42607050 42377063 42187084 41777124
               41147210 40767274 40517339 40337377 40047408 39827454
               39847546 40047595 40277647 40537671 40977675 41777648
               42927511 43737411 44067296 44137218 43987180 43667137 

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