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Mesoscale Discussion 2185
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   Mesoscale Discussion 2185
   NWS Storm Prediction Center Norman OK
   0605 PM CST Sun Dec 01 2019

   Areas affected...Portions of southern New England

   Concerning...Winter mixed precipitation 

   Valid 020005Z - 020500Z

   SUMMARY...A few hours of 1 inch per hour snowfall rates are possible
   in northern Massachusetts into southern Vermont and New Hampshire
   this evening and into the early overnight. The heaviest snowfall is
   expected between 11 PM and 1 AM EST. Portions of Connecticut, Rhode
   Island and adjacent Massachusetts will likely continue to see mixed
   precipitation.

   DISCUSSION...A surface low is in the process of
   redeveloping/deepening off of the eastern New Jersey coast. Surface
   observations indicated 2-3 mb of deepening in the Long Island
   vicinity over the past 2 hours. As this process continues into the
   evening, increasing low- and mid-level warm advection/frontogenesis
   will foster snow rates perhaps around an inch an hour, primarily in
   northern Massachusetts and southern Vermont/New Hampshire. Farther
   south, KBOX/KOKX dual-polarization radar imagery shows a clear
   transition from snow to sleet and freezing rain along the
   Massachusetts/Connecticut border. Areas of Connecticut, Rhode
   Island, and eastern Massachusetts will see lesser snowfall rates and
   mixed precipitation on account of a warm nose within the 850-700 mb
   layer. The highest snowfall rates are forecast to occur between 11
   PM to 1 AM EST before deep-layer ascent moves eastward and mid-level
   dry air moves in.

   ..Wendt.. 12/02/2019

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...GYX...BOX...BTV...OKX...ALY...

   LAT...LON   42657361 42857348 43047325 43327283 43407240 43457107
               43277045 43257037 43157041 43107040 42787051 42277075
               41837092 41407154 41287252 41367335 41517378 42287376
               42657361 

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Page last modified: December 02, 2019
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