Thursday night into Friday, a southern stream system will become a
bit better organized with the sfc low tracking northeast across
Kentucky and Tennessee. Meanwhile...a secondary coastal low will
begin to form off the Carolinas which over time becomes the main sfc
low that steams up the coast during the day Friday. Thermal profiles
suggest that this will primarily be an all snow event. Some guidance
does show warm layer between H925-H85 getting precariously close to
the NY/PA boarder on Friday. Could see wintry mix if enough warm
air sneaks in aloft. This far out seems too low a potential to
include in the grids, so kept only snow for ptype. As alluded to
previously, some concern in the track of the H85 low which isn`t
ideal as it tracks across western NY while stronger warm air
advection is more to the east closer to the developing coastal low.
Combination of these two factors may lead to multiple periods of
light precipitation with little snow accumulation or even a lull in
steadier precipitation. No change to the thinking that we`ll see some
accumulating snow, but the negatives mentioned may prohibit this
from being a bigger snow event. Stay tuned.