FXUS61 KBTV 241051
Area Forecast Discussion
National Weather Service Burlington VT
651 AM EDT Fri Mar 24 2023
Cool and dry weather is expected through midnight as high
pressure briefly crosses the region. Then as a strong low
pressure system passes to our northwest, an elevationally
dependent mixed precipitation and snowfall event will unfold
over the region Saturday into Saturday night. Some light snow
and ice accumulations are possible. After lingering showers on
Sunday, we turn towards drier weather early next week.
.NEAR TERM /THROUGH TONIGHT/...
As of 430 AM EDT Friday...Surface and upper level ridging will
move into our region today, and a gradual clearing trend is
expected. Quiet weather with cooler than normal temperatures is
forecast for today into tonight. The ridge crests directly
overhead tonight, resulting in light winds and at least some
clearing, though high clouds will begin to increase in western
areas toward daybreak Saturday ahead of our next system. High
temperatures today will range from the mid 30s to lower 40s.
Temperatures will dip into the teens and 20s overnight.
.SHORT TERM /SATURDAY THROUGH SUNDAY/...
As of 445 AM EDT Friday...Low pressure system will track from
just south of the Great Lakes early Saturday morning,
northeastward into eastern Ontario by Saturday evening, and
cross north of our region Saturday night. A weaker secondary low
will form somewhere along the New England coastline on Saturday
night into Sunday as well. Precipitation will spread northward
into our region by early Saturday morning. Models still show a
strong band of frontogenesis lifting across our area during
Saturday afternoon, and the heavier precipitation should help to
cool the column enough for some snow. Southeasterly flow aloft
will mean that first batch of precipitation early Saturday
morning will be highest on the east facing upslope regions of
the Greens and Dacks. Will also see some strong downslope winds
out of the southeast on west facing slopes. The flow will become
more southwesterly as the day wears on, and warm air aloft will
move into the region. Most valley locations will mainly see rain
with this storm, while the higher elevations will probably
experience all precipitation types throughout the storm. As the
secondary low forms off the New England coast during the
overnight hours, temperatures will cool aloft and the higher
elevations will see a change over to snow before the
precipitation becomes more showery and comes to an end. Storm
total liquid precipitation will be around a quarter of an inch
up to six tenths of an inch. Snow accumulations will mainly be
from 1500 feet and higher, and around one to four inches. Lower
elevations should only see an inch or less. Ice accumulations
will mainly be limited to southern Vermont and some higher
elevations, and a few hundredths of an inch or less. Further
fine tuning and forecast adjustments are expected with such a
complex scenario with borderline thermal profiles and elevation
dependency. Low pressure will continue to track further away
from our region. Precipitation will become more showery before
ending midday Sunday.
.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
As of 341 AM EDT Friday...Generally seasonal, quiet weather for next
week as upper CONUS flow remains progressive. There remains one
larger-scale system to watch, most notably in the Tuesday
Night/Wednesday time frame as eastward moving Ohio Valley energy
interacts with a slight digging of the polar trough centered across
central Canada. Models continue to have different ideas on timing
and strength of this feature, but the majority consensus keeps the
two upper streams unphased with deeper moisture and energy remaining
largely south of our area leaving just some scattered rain/snow
shower activity. Temperatures should hold within a few degrees of
seasonal norms through next week as daily highs top out in the upper
30s to mid 40s and overnight lows bottom out mainly in the 20s to
locally around 30.
.AVIATION /12Z FRIDAY THROUGH TUESDAY/...
Through 12Z Saturday...Mainly VFR through the forecast period
with SCT/BKN cigs generally from 035-060 AGL. Some lingering
MVFR at KEFK and KSLK through 18Z. Winds west to northwest 5 to
10 kts, abating to light and variable by 00Z Saturday. Other
than a stray morning sprinkle/flurry, no precipitation is
Saturday: Mainly VFR, with local MVFR and IFR possible. Definite
RA, Definite SN.
Saturday Night: Mainly MVFR, with local IFR possible. Windy with
gusts to 30 kt. Definite RA, Definite SN, Definite PL, Chance
Sunday: Mainly MVFR, with areas VFR possible. Chance SHRA, Chance
Sunday Night: Mainly VFR, with areas MVFR possible. Slight chance
Monday: Mainly VFR, with areas MVFR possible. NO SIG WX.
Monday Night: Slight chance SHSN.
Tuesday: Chance SHSN, Chance SHRA.