I love this paragraph in the overnight update from GYX:
Snow arrives late Saturday and Saturday night as a large area
of low pressure exits the Ohio Valley with a secondary area of
low pressure forming along the southern New England coastline by
Sunday morning. Heavy snow and mixed precipitation will be
associated with this intensifying cyclone through Sunday. Would
expect the model solutions to potentially trend colder from run
to run. Thereafter, there is good model consensus that Arctic
air will once again pour into the region on strong westerly
winds to start out next week.