AREA FORECAST DISCUSSION
National Weather Service Albany NY
736 PM EST Wed Jan 12 2022
.SYNOPSIS...
Southwest flow will bring above normal temperatures through
Thursday. This period will also see a chance of snow showers
over the southern Adirondacks. An arctic front will cross the
area later Thursday night into Friday morning with a chance for
some additional snow showers. Mainly fair and bitter cold
weather is expected over the weekend. A powerful storm moving
from the Gulf Coast up the East Coast has the potential to bring
a significant snowfall on Monday.
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.LONG TERM /SATURDAY THROUGH WEDNESDAY/...
A potent southern stream shortwave will be lifting northeast from
the Deep South and mid Atlantic for Sunday night into Monday. This
will be a closed upper level low. Some northern stream energy will
also be approaching, although its still unclear if this will phase
with the strong southern stream storm. This storm will have
abundant Gulf moisture as it lifts northeast. While earlier model
runs have had the storm taking more of an offshore track, most
operational models are now showing a track along or even inland
through the eastern seaboard into the interior Northeast. Some
ensemble members from the 12z GEFS still show a more offshore or
coastal track, but a storm track that passes through our area is
very possible with this storm.
As a result, this makes p-types more of a concern, especially for
southern and eastern areas, despite the very cold surface temps that
we have recently been experiencing. While all areas will start off
as snow, a changeover to a wintry mix or rain is possible during the
day on Monday as the low moves across the area, mainly for areas
south/east of the Capital Region. All areas could change back to
snow before precip winds down on Monday evening, as the surface low
moves to the north and wraparound/deformation precip occurs.
Exact p-types, amounts, and duration of each will ultimately depend
on the storm track, which is still very uncertain. For now, will
include some mixing with rain and freezing rain for eastern and
southern areas. Any mixing will cut down on snowfall totals, but
widespread precip is expected, with total liquid equivalent over
0.50" being currently shown by most 12z GEFS members.
Northern/western areas currently have the best chance of seeing
significant snowfall with this storm.
In addition, this will be a very strong low pressure area (possibly
around a 980 hpa surface pressure as it passes close to the area).
With a strong pressure gradient in place, there will be the
potential for very strong winds. This will be especially true for
parts of the Taconics/western New England on Sunday night, where the
east-southeast flow channels through the terrain. Some gusts over
40 mph are possible for these areas, with windy conditions possible
for the whole area. The combination of heavy snowfall and gusty
winds could make for very difficult travel from Sunday night into
Monday.