National Weather Service Burlington VT
653 PM EST Fri Mar 4 2022
.SYNOPSIS...
Scattered light snow showers and flurries across the region
this afternoon will gradually diminish overnight followed by
quiet and dry weather for Saturday. Changeable conditions are
expected for the latter half of the weekend where light mixed
precipitation Saturday night will be followed by a
surge of much
warmer air and
scattered rain showers Sunday as temperatures
eventually reach well into the 50s. Cooler conditions return for
Monday along with a period of rain and snow for Monday
afternoon into Tuesday.
&&
.NEAR TERM /THROUGH SATURDAY/...
As of 609 PM EST Friday...The
shortwave energy has begun to exit
the region and as a result, the weak conditional
instability
from this afternoon has waned and we are seeing a steady decline
in
radar returns across northern New York. At the same time, we
are seeing the 500
mb ridge begin to shift northward toward the
North Country. All of this should lead to any lingering snow
showers to dissipate prior to midnight with dry conditions
expected to linger through the daylight hours on Saturday. The
low level
moisture continues to look like it`ll get trapped
beneath a
subsidence inversion tonight so it`ll
likely be
cloudy at more places than not through the overnight hours.
Previous Discussion...As expected, a weak
shortwave trough
dropping southeastward from Canada has produced some
scattered
snow showers and flurries across the region this afternoon. With
a very dry airmass in place though, lots of what we`re seeing
on
radar returns are falling as
virga with the higher elevations
seeing the most activity, albeit very light. Not expecting
anything more than a dusting with this stuff, and it should
gradually diminish overnight as the
shortwave exits the region
and is replaced by surface high pressure. Tough cloud forecast
for tonight as the
shortwave has brought in some low/mid-level
moisture that soundings indicate will become trapped below a
developing
subsidence inversion around ridgetop levels. Thinking
we`ll see considerable cloudiness across northern areas with
the southern Champlain and Connecticut valleys
likely seeing the
least cloud cover. Any clearing early Saturday morning though
will be replaced quickly by increasing mid/
high clouds from the
southwest ahead of our next system, but Saturday should be
pleasant and dry. Lows tonight will be chilly again though
warmer than last night in the single digit to teens above zero,
and highs Saturday will be seasonal in the low/mid 30s except
locally in the upper 20s in the northern St. Lawrence Valley.
&&
.SHORT TERM /SATURDAY NIGHT THROUGH SUNDAY NIGHT/...
As of 323 PM EST Friday...No significant changes made to latter
half of the weekend forecast this afternoon with models locked
in to the overall synoptic pattern which features low pressure
forming in the
lee of the U.S. Rockies Saturday that will track
through the Great Lakes Saturday night, north of Montreal on
Sunday and into the Gulf of St. Lawrence Sunday night.
Saturday Night - Sunday: Overall impacts continue to trend
downward for this period in regard to wintry mix potential as
model trends continue to favor a faster progression of a warm
lifting through the forecast area.
Limited QPF along the frontal
passage will keep a mix of snow, sleet and freezing rain
spotty/showery early Sunday morning with perhaps just a light
glaze across the northern St. Lawrence Valley and eastern
Vermont where cold air will be harder to scour out. By mid
Sunday morning a strong warm nose aloft associated with a 60+
kt
850mb southwesterly
jet will mix out quickly to the surface with
any
frozen precip will transition to rain showers as
temperatures rapidly warm into the 50s by mid- afternoon. Expect
a band of showers to move through the region during the early
half of the day, but as the region becomes well entrenched in
the warm sector in the afternoon, showers will become more hit
or miss with south/southwesterly winds becoming gusty in the
25-35 mph range with locally up to 45 mph possible across the
St. Lawrence Valley and northern Adirondacks.
Sunday Night: A
trailing cold front sweeps into the region
Sunday evening with generally little fanfare as the bulk of deep
moisture with this system will by that time be north of the
border. Scattered rain showers could switch to snow before
ending, but little to no accumulation is expected. Temperatures
remain mild overnight in the upper 20s to mid 30s.
&&
.LONG TERM /MONDAY THROUGH FRIDAY/...
As of 330 PM EST Friday...Cold
front which crosses the area
Sunday night will remain situated south of our area, and next
wave of low pressure will ride along it bringing next
precipitation system to the region on Monday afternoon and into
the overnight. Track of the low will be south of our forecast
area, keeping us on the colder side of the system. Will see
light snow, mixing with rain during the daytime hours fairly
widespread across our area. Precipitation totals from Monday
into Monday night will range from around a quarter of an inch
along the international border up to about a half an inch in
southern Vermont.
Snowfall totals will range from around a
coating across our southern zones up to 3 inches in the Northern
Greens and Northernmost Dacks. Daytime high temps will be quite
mild leading to further snowmelt, therefore with snowmelt and
precipitation we`ll keep an eye on any possible flooding
concerns as we get closer to early next week. A weak northern
stream clipper system will bring another chance for some light
snow showers Wednesday night into Thursday. Another possibly
more impactful system will arrive for the end of the week, with
likely pops beginning on Friday, though still much uncertainty
with track of the low and precipitation type a full week out.