Area Forecast Discussion
Issued by NWS Burlington, VT

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FXUS61 KBTV 280547

Area Forecast Discussion
National Weather Service Burlington VT
147 AM EDT Tue Mar 28 2017

Surface low pressure system continues to push eastward across
Quebec. Scattered showers redevelop Tuesday as surface front
moves west to east across our area. Wednesday and Thursday will
be drier with ridge of high pressure building south out of
Canada and over the North country. Another storm system looks to
affect the region on Friday.


As of 1107 PM EDT Monday...The North Country is in between mid-
level troughs this evening. The leading shortwave trough - which
brought this morning`s precipitation (0.30" at BTV since
midnight) - is exiting ewd across nrn Maine and New Brunswick.
There is a weaker shortwave and associated surface trough across
sern Ontario and swrn Quebec, with is maintaining a moist S-SE
flow across the North Country overnight. Not anticipating much
change in wx conditions next 6-12hrs...with temps generally
holding above freezing in the 35-40F range with low overcast in
place. Dewpoint depressions are small, and have seen some
developing fog at MSS/Potsdam this evening. With upr 30s
dewpoints over the existing snowpack, could see some additional
patchy dense fog overnight. Deep-layer forcing is limited. In
fact, NAM/RAP soundings show mid-level drying thru the remainder
of the any lingering precipitation should
primarily be drizzle or perhaps a light orographically induced
rain shower or two. Only change with this update was to include
patchy fog areawide.


As of 330 PM EDT Monday....Surface high pressure will build
southward from James Bay Tuesday. Low pressure system tracks
eastward across Quebec dragging a surface front with it across
our CWA. Will have some scattered light rain showers for Tuesday
into the first part of Tuesday night. Region will be solidly in
the warm sector ahead of aforementioned front early in the day
and max temperatures will reach the upper 40s to around 50.
Strongest shortwave energy stays well south of our CWA Tuesday,
therefore only scattered showers expected with the frontal
passage in the afternoon into Tuesday evening. Showers will
taper off Tuesday overnight, with possible change over to snow
showers with colder air moving into the region on Northwesterly
flow. On Wed upper level trough pushes across our area with
surface high pressure building south and east from central
Ontario. Will continue to be some scattered light rain or snow
showers, mainly across the northern high terrain. Wednesday will
be about ten degrees cooler than Tue and back below seasonal
normals once again. Looks to be a breezy day as well with cold
air advection and northwesterly winds gusting up to 25 mph.
Partly sunny skies will develop during the afternoon hours. On
Wednesday night any remaining precipitation comes to an end with
large ridge of surface high pressure ridging into the north
country. Wednesday night will be near normal, temps dropping
back into the 20s with some teens in the Dacks.


As of 357 PM EDT Monday...A ridge of high pressure will be over
the north country Thursday through Thursday night with fair and
dry weather expected. A low pressure area over the Ohio valley
will spread moisture into the region on Friday. GFS and ECMWF
model showing some timing differences at this time, with the GFS
model holding off precipitation until Friday afternoon, while
the ECMWF is more aggressive and bring precipitation in earlier
in the day on Friday. Have raised superblend pops to high chance
(50 percent) for Friday across the region, and will have likely
pops for Friday night. Will go with a mention of rain and snow
for Friday and Friday night. Precipitation will linger into
Saturday, so will continue with a chance of rain and snow. Have
stuck with superblend pops for Saturday night and Sunday, and
will have a chance of rain or snow showers. A ridge of high
pressure will build into the north country on Monday for fair
and dry weather.


Through 06Z Wednesday...A mix of MVFR to VLIFR will continue
through the overnight hours and into the morning hours before a
slight lift to MVFR/IFR through the remainder of the period.
Some scattered rain showers are likely from mid-morning through
the evening as a cold front shifts into the region with brief
reductions in vsby. Light winds shift to the northwest at
5-10 knots behind the front after 18Z across northern New York
and after 21Z across Vermont.

Outlook 06Z Wednesday through Saturday...

06Z Wednesday through 00Z Thursday...MVFR/IFR in scattered scattered
rain/snow showers, mainly across central/northern Vermont.

00Z Thursday through 12Z Thursday...Mainly VFR. Isolated snow
showers over higher terrain.

12Z Thursday through 12Z Friday...VFR under high pressure.

12Z Friday through 00Z Sunday...Areas of MVFR/IFR in rain and




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