Winter Weather 23/24

National Weather Service Burlington VT
1013 AM EST Thu Jan 11 2024

SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY NIGHT/...
As of 443 AM EST Thursday...The active weather pattern
continues as we head into the weekend, with another deepening
low tracking to our west over the Great Lakes. This weekend
system will bear similarities to the most recent system that
impacted the region, with the main threats being gusty to strong
winds and accumulating snowfall. As precipitation first reaches
the region, a burst of snowfall can be expected at the start
transitioning to rain/snow mix and rain across most of the
region.
Model temperature profiles support the idea that there
may also be some periods of wintry mix and sleet as
precipitation transitions from snow to rain, especially when
compared to this more recent event where a period of sleet was
observed. Current forecast snowfall accumulations suggest 1-3
inches across the Champlain Valley and portions of eastern
Vermont, with 3-7 inches elsewhere and locally higher across the
higher terrain.
The biggest question with these amounts will be
how quickly the snow transitions to rain, as well as the
presence of any sleet and mixed precipitation. Widespread
precipitation will taper off to light snow showers by Saturday
evening, especially across northern New York with enhancement
from Lake Ontario.
Strong winds are expected with the deepening
low to the west and a strong 850mb jet. Southeast winds between
20 to 30 mph and gusts between 40 and 60 mph are expected, with
locally higher gusts possible along the western slopes of the
Greens.
A High Wind Watch was issued for the western slopes of
the Green Mountains due to increasing confidence of strong to
damaging downsloping winds
, with additional headlines possible
as we get closer to the system. Some gusty southwesterly winds
will be possible across the St. Lawrence Valley Saturday evening
on the backside of the system.

&&

.LONG TERM /SUNDAY THROUGH WEDNESDAY/...
As of 443 AM EST Thursday...Behind the departing low pressure system,
chances for scattered snow showers and flurries round out the
weekend and continue into next week. Some lake effect snow showers
may linger across northern New York in the St. Lawrence Valley.
Another system will likely move into the region towards the
beginning half of next week, however there is low confidence
regarding any impacts.
Both GFS and ECMWF ensemble guidance show no
clear clustering of low tracks, however recent deterministic
guidance shows most impacts staying well to our south
. Given the
uncertainty, primarily stuck to the NBM for most of the forecast,
with some scattered snow showers across the region. Temperatures
next week will be near seasonal normals, with highs in the 20s and
overnight lows dropping into the single digits and teens.
 
NE_Snow.png
 
I hope the power doesn’t go out again and the trees stay put with this next one.
Things should be cold for awhile afterwards.
 
Skied till 1pm today. There is plenty of snow and it flurried in the late morning. Conditions were fast and firm with some death cookies. I think if it was just 5 degrees warmer it would have been really excellent today. Darby woods was open. I’ve never seen it open so we took our chances. Definitely could have used some more snow in there but we came out alive.
 
National Weather Service Burlington VT
718 AM EST Fri Jan 12 2024

NEAR TERM /THROUGH SATURDAY/...
As of 712 AM EST Friday...Made only minor adjustments to clouds
and temperatures this morning based on observational trends.
Overall forecast remains on track.

A very active period of weather is expected during the near-
term period, especially as we head into the overnight hours
tonight into Saturday morning. For starters, a modest mid-level
shortwave departing across NH and northern ME is allowing light
snow shower activity and flurries to diminish across the North
Country early this morning. No additional snow accumulation is
expected. The lingering 4-5kft AGL stratus deck will be
difficult to scour out with light wind regime and only modest
subsidence as weak ridge of high pressure builds across northern
New England during the daylight period. Have indicated just a
few breaks during the day before mid-high level clouds increase
from SW-NE ahead of our next system developing across the mid-MS
river valley. High temperatures today will generally reach the
lower 30s, with mid- upper 20s along the intl border. With dry
conditions, not expecting any travel issues today into early
this evening.

The 00Z NWP guidance suite continues in excellent agreement in
regard to rapidly deepening low pressure moving into lower Michigan
by 06Z tonight. System is quite deep with central pressure in the
mid-970s range in most of the deterministic guidance. The ewd
extending occluded front and warm front will be the main focus
for strong low-level isentropic ascent as frontal precipitation
overspreads the North Country between 04-08Z from SW-NE.
Thermal profiles are initially supportive of snow, and strong
isentropic ascent and orographic enhancement will support
1-2"/hr snowfall rates across the Adirondacks and ern slopes of
the srn/central Green Mtns for a time during the pre-dawn hours
Saturday. Anticipating locally 3-6" in western Windsor and
Orange counties, as well as along the spine of the Green Mtns
late tonight thru Saturday morning. Appears higher amounts 6-10"
are possible across the Adirondacks, especially the High Peaks
region.
Elsewhere, generally 1-3" of snow before a brief
sleet/freezing rain mix, going to all rain in the Champlain
Valley by daybreak Saturday. Expected snow accumulations and
strong winds support Winter Storm Warning for srn Franklin NY
and wrn Essex NY. Will go with Winter Weather Advisories
elsewhere in the nrn Adirondacks 03-17Z. In VT, will go Winter
Weather Advisories for ern Rutland, ern Addison, Orange, and wrn
Windsor from 03-17Z.

The other significant concern are the downslope sely wind conditions
along the western slopes of the Green Mtns, peaking during the 6-12Z
period Saturday morning. The synoptic setup has a lot of
similarities to what we recently experienced Tuesday night into
Wednesday AM. The 925-850mb flow is slightly less than the event
Wednesday morning. However, the 850mb flow also has more of an
easterly component Saturday morning as compared to Wednesday
morning. As is typical with more of an easterly flow, we may see
greater wind impacts in the Rutland area northward into Addison
county, and the strongest gusts a bit more confined to the
communities along the western slopes of the Green Mountains.
Would
anticipate lesser wind gusts in the immediate Burlington area, but
there will be a strong gradient in max wind gusts over eastern
sections of Chittenden County. Scattered to numerous power outages
look likely along the western slopes of the Green Mountains with
peak gusts 60-65 mph, and locally across n-central into nern VT over
the higher terrain. Will upgrade to High Wind Warnings along the
western slopes of the Green Mountains
with Wind Advisories
elsewhere across a large portion of VT and nrn Adirondacks.

&&

.SHORT TERM /SATURDAY NIGHT THROUGH SUNDAY/...
As of 333 AM EST Friday...Deep low pressure will be slow to depart
across sern Ontario and srn Quebec Saturday night into Sunday
morning. While the system will be gradually weakening, strong
gradient flow and favorable thermodynamic profiles will bring lake
effect snow streamers from Lake Ontario newd into St. Lawrence and
possible Franklin County NY during Saturday night and Sunday.
This
may result in localized 5-10" snowfall totals across portions of
swrn St. Lawrence County during the short-term period. We`ll hold
off on headlines in this region for now, but if trends continue
additional winter headlines will be possible for snow and blowing
snow. Elsewhere, brisk conditions are expected with 15-25 mph winds
and gusts to 35 mph. Winds may locally gust 40-45 mph with channeled
flow in the St. Lawrence Valley. Lows Saturday night mainly in the
low-mid 20s, with highs on Sunday 25-30F.


&&

LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
As of 351 AM EST Friday...Behind the departing low pressure system,
lake effect snow will continue across St. Lawrence County into
portions of the Adirondacks. Brisk southwesterly winds will
gradually abate throughout the night on Sunday. Temperatures
overnight Sunday will be a bit warmer than seasonal normals due to
increased clouds and winds, with lows dropping into the upper teens
to single digits in the higher terrain. Monday will be fairly quiet
with some lingering mountain showers and lake effect moisture,
however impacts are expected to be minimal. Temperatures will be
seasonable during the day, with highs in the upper teens to mid 20s
for Monday.

As we head into mid week, there continues to be the possibility of
another potential impact
low pressure system. The latest 00Z
deterministic consensus continues to be split on the development of
coastal system, similar to what was seen with the prior 12Z
guidance. Ensemble guidance shows some uncertainty as well, with a
wide range of individual member low locations throughout the time
frame. Given the uncertainty, the forecast for the time frame
largely stuck to the NBM, with a chance of snow across the region,
however this potential will continued to be monitored so stay tuned.
 
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