The main arctic cold front is crossing Western and Central NY early
this afternoon, supporting a band of snow showers and snow squalls
along it that are partially fueled from lake effect bands that the
front captured and is spreading inland. Most of the heavier, frontal
snow squalls will move southeast of the area by mid afternoon.
A very sharp, deep, mid level trough will dive across northern NY
and New England tonight, delivering some of the coldest air so far
this early winter season. This will continue to support lake effect
snow, with migrating bands as winds steadily veer to the northwest
in the wake of the cold front. Lake induced equilibrium levels are
near their peak now at over 15K feet, then will steadily drop
tonight as the deepest cold air aloft moves away and inversion
heights lower.