.LONG TERM /SUNDAY THROUGH WEDNESDAY/...
A compact system seems set to advance right along the NY/PA
border very early in the long term period. The ECMWF and GFS
have trended together in a very tight cluster with regard to
this solution. This is a cold deviation from previous guidance
and suggests a swath of very strongly forced frontogenetical
precipitation to the north of the surface low track. Thermal
profiles with these solutions suggest rapid cooling during the
day Sunday aloft with precipitation transitioning from rain to
snow. Given the dynamics and possibility of dynamical cooling,
it would seem fairly impressive snowfall could be possible out
of this solution. However, given the strong deviation from
previous runs of the models and the likelihood of the solutions
wobbling in the coming days for this period, the forecast was
only trended colder with some possibility of a rain/snow mix
introduced over western New York.