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  Saturday May 26, 2018

 

NWS Area Forecast Discussion


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FXUS61 KBTV 221903
AFDBTV

Area Forecast Discussion
National Weather Service Burlington VT
303 PM EDT Tue May 22 2018

.SYNOPSIS...
Showers associated with weak low pressure moving across the region
will end this evening with high pressure building in after midnight.
A cold front will cross the area Wednesday with a few additional
showers or perhaps an isolated thunderstorm across northern
counties. Behind this front, fair and seasonably warm weather is
expected through the remainder of the work week.

&&

.NEAR TERM /THROUGH WEDNESDAY NIGHT/...
As of 253 PM EDT Tuesday...Weak surface low pressure located
over the eastern Great Lakes this afternoon will continue to
provide the North Country with periods of showers this afternoon
and evening before shifting east. Main batch of precipitation
is pushing through central and eastern area currently, and
expect there to be a brief break later this afternoon into the
early evening before additional showers develop around sunset
across northern New York and track eastward through Vermont
through midnight. After midnight, high pressure noses into the
area with gradual clearing expected by sunrise. With mild
overnight temps in the 50s, mainly light winds and today`s
rainfall, areas of fog are a good bet, especially in the climo
favored river valleys.

For Wednesday, mainly dry conditions are expected with mostly
clear skies in the morning giving way to increasing cumulus
clouds across central and northern areas as a well defined cold
front drops southward through the region. As mentioned by
previous forecasts, we`ll be on the back side of this front and
parent upper trough with the best moisture and forcing generally
off to our northeast. Guidance continues to hint at some
isolated to widely scattered shower activity developing during
peak heating mainly across northern Vermont, with some weak
instability around supporting the idea of perhaps an isolated
thunderstorm as well. Continued this idea from previous
forecasts with any activity dissipating rapidly with the loss of
insolational heating after sunset. In addition, steep low level
lapse rates will promote good mixing from aloft with winds
becoming brisk out of the northwest at 15-25 mph in the
afternoon. After a normal to slightly cool Tuesday, Wednesdays
highs will be back above normal in the mid/upper 70s.

A clear, quiet and cool night is on tap for Wednesday night
with high pressure centering over the region. Low confidence on
fog overnight despite the clearing skies as boundary level winds
look strong enough to inhibit development. Lows will run mainly
in the 40s, with a few spot upper 30s possible in the colder
hollows of the Adirondacks and northeast Vermont.

&&

.SHORT TERM /THURSDAY THROUGH THURSDAY NIGHT/...
As of 245 PM EDT Tuesday...Large ridge of surface high pressure
will be over the region for Thursday and Thursday night. Dry
weather with warmer than normal temperatures can be expected.

&&

.LONG TERM /FRIDAY THROUGH TUESDAY/...
As of 300 PM EDT Tuesday...More active weather will return for
the upcoming weekend after one more dry day on Friday. Surface
high pressure will slide eastward Friday, and warm southerly
return flow will bump temps up into the upper 70s and lower 80s.
Model guidance is still indicating that Saturday will be the
wetter of the two weekend days, but can`t say that Sunday will
be completely dry just yet. A cold front will drop south across
our area on Saturday, widespread rain showers are expected,
during the morning across our Northern zones and afternoon
across our Southern zones. Then the front will stall out to our
South just off the coast of New York and remain there into early
next week. With this boundary to our South, it`s tough to rule
out precipitation in the Sunday through Tuesday timeframe as
this front may drift North or South during this time period.
With clouds and precipitation, temperatures will trend cooler
than seasonal normals.

&&

.AVIATION /19Z TUESDAY THROUGH SUNDAY/...
Through 18Z Wednesday...Current VFR will gradually trend to
MVFR ceilings from southwest to northeast this afternoon with
periods of showers continuing but no restrictions to
visibility. MVFR ceilings continue through the overnight with
ares of IFR likely, especially across northern New York at KMSS
and KSLK. After 12Z, conditions improve quickly to VFR with some
diurnal cumulus developing with a chance for isolated showers
possible across northeast areas.

Outlook...

Wednesday Night: VFR. NO SIG WX.
Thursday: VFR. NO SIG WX.
Thursday Night: VFR. NO SIG WX.
Friday: VFR. Slight chance SHRA.
Friday Night: VFR. Chance SHRA.
Saturday: MVFR/IFR conditions possible. Chance SHRA.
Saturday Night: VFR. Chance SHRA.
Sunday: Mainly VFR, with local MVFR possible. Chance SHRA.

&&

.BTV WATCHES/WARNINGS/ADVISORIES...
VT...None.
NY...None.

&&

$$
SYNOPSIS...Lahiff
NEAR TERM...Lahiff
SHORT TERM...Neiles
LONG TERM...Neiles
AVIATION...Lahiff



 
 
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