Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
356 AM EDT Sun May 12 2019

Valid 12Z Sun May 12 2019 - 12Z Wed May 15 2019

...Northeast...

A closed upper low with anomalously low heights is expected to
support some late season high elevation snows across portions of
the Northeast. 

Rain changing to snow can be expected across some of the higher
elevations of the Catskills, Adirondacks and northern New England
ranges Monday night into Tuesday as a closed low producing 500mb
heights 1 to 1.5 standard deviations below normal moves east from
the Great Lakes into the Northeast.  Greatest potential for
significant accumulations centers along the northern White
Mountains, including the Presidential Range, where WPC guidance is
showing a Slight Risk for accumulations of 4-inches or more on Day
2 (ending 12Z Tuesday).

As a coastal low develops over the Gulf of Maine, precipitation is
expected to continue across northern New England, with additional
snows likely for portions of the northern White Mountains,
especially during the overnight period Wednesday night into early
Thursday.   

The probability of significant icing is less than 10 percent.

Pereira