National Weather Service Burlington VT
334 PM EST Mon Mar 7 2022
.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...
As of 332 PM EST Monday...Focus for the long-term continues to be on
the digging mid-level
trough from the Northern Plains sewd across
the Great Lakes/Ohio Valley, and subsequent significant
cyclogenesis
across the mid- atlantic states Friday night into Saturday morning.
Surface low is expected to track
newd while
deepening rapidly on
Saturday. The 12Z
GFS indicates a 973mb surface low over
northwestern ME by 18Z Saturday. The 12Z
ECMWF has shifted further
east than previous runs, with a 980mb low near PWM at 18Z Saturday.
The 12Z Canadian is similar to the
ECMWF.
Low-level air mass is
initially warm across across Vermont and Northern NY. Should see
rain developing late Friday night into Saturday morning, and have
already indicated 90% PoPs for Saturday. We`ll see significant
dynamical cooling as the low pressure system matures/intensifies,
along with an eastward moving frontal zone that the low is expected
to track along. Should see a W-E transition over to snow...first
across nrn NY, and gradually into VT Saturday afternoon/evening.
Elevation will play a role as well, with snow levels gradually
lowering to the valley floors. Current indications are that
frontogenetic forcing will be quite strong, thus could see some
rapid wet snow accumulations Saturday afternoon/night as thermal
profiles cool sufficiently to support snow despite marginal
boundary layer conditions. While it is too soon to talk amounts,
heavy snowfall rates could result in difficult travel later
Saturday/Saturday night before snow ends late Saturday night. We
will continue to monitor carefully.
Should see cold/blustery conditions on Sunday, with continued
mountain snow showers/flurries in moderately strong NWLY flow.
Should see highs on Sunday only in the 20s, with low wind chills
given NW winds 15-25 mph and gusts to 35 mph, especially during the
morning hours. Drier conditions expected Sunday night into Monday,
and temperatures should moderate back into the upper 30s to lower
40s for highs on Monday.