SPC MD 2185


MD 2185 Image

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

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...


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

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