-- Discussion containing changed information from previous version are highlighted. --
364
FXUS61 KCAR 092207
AFDCAR

Area Forecast Discussion
National Weather Service Caribou ME
607 PM EDT Thu May 9 2024

.SYNOPSIS...
High pressure builds across the region through Saturday night.
A warm front approaches Sunday, then lifts to the north Sunday
night and Monday. A storm system approaches from the west Monday
night and Tuesday.

&&

.NEAR TERM /THROUGH FRIDAY/...
-- Changed Discussion --
6:06 PM Update: Satellite pictures and web cameras across the
FA indicate a partly to mostly cloudy sky. There are more breaks
in the clouds to the north, and expect that with the loss of
daytime heating that the clouds will break up a bit tonight from
north to south. Any remaining isolated showers from northern
Somerset County to southeast Aroostook County will dissipate in
the next hour or two. No significant changes are planned to the
ongoing forecast at this time.

Previous discussion:
Surface high pressure to the north ridges south across the
region later tonight through Friday. Aloft, the upper trof
across northern areas weakens tonight through Friday. Isolated
showers are still possible this evening. Otherwise, expect
mostly cloudy skies early tonight with clouds then decreasing
overnight. Generally expect partly sunny skies Friday. However,
diurnal heating and the remnants of the upper trof could also
help support an isolated afternoon shower. Low temperatures
tonight will generally range from the lower to mid 30s north, to
the mid to upper 30s Downeast dependent on how rapidly clouds
decrease overnight. High temperatures will generally range from
the mid to upper 50s across the forecast area Friday.
-- End Changed Discussion --

&&

.SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY/...
A weak shortwave crosses the area Friday night and Saturday.
Some isolated showers are possible with its passage. Lows Friday
night should be a few degrees below normal, mainly from the mid
30s to around 40. Highs on Saturday should be around 5-10
degrees below normal, generally in the lower to mid 50s.

Shortwave ridging then builds in Saturday night, with
associated subsidence keeping things dry. Lows Saturday night
should be a few degrees below normal.

The models are in good agreement that a closed low forms as a
trough pushes down into the eastern seaboard. However, they
differ on exactly where this closed low is located. Depending on
the location of this feature Sunday could be dry, or it could
feature isolated to scattered showers. Given the large spread in
model and ensemble solutions, have limited pops to slight
chance. Highs will be very dependent on where this closed low
tracks, for now going about 5 degrees below normal, but could
see how those temperatures could be 5 degrees cooler or warmer
than what is currently forecast.

&&

.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
Model uncertainty remains the theme for the forecast Sunday
night through Thursday, as differences in handling of the closed
low early in the week, lead to differences in the timing and
strength of ridging behind it and then when the system behind
that ridging arrives.

Given this uncertainty ran with slight chance to low end chance
pops through the extended period.

Temperatures should trend from below to above normal during
this time frame, noting the temperature forecast is of below
normal confidence for this time frame given the high degree of
model spread.

&&

.AVIATION /22Z THURSDAY THROUGH TUESDAY/...
-- Changed Discussion --
NEAR TERM: MVFR conditions this evening at KBGR and BHB,
otherwise VFR expected through Friday. North wind around 5 knots
tonight, and northeast/east wind 5 to 10 knots Friday.

SHORT TERM:
Friday night-Tuesday...MVFR possible with any showers, otherwise
VFR. Very low confidence on specific timing of any MVFR
conditions during this time frame.
-- End Changed Discussion --

&&

.MARINE...
-- Changed Discussion --
NEAR TERM: Winds/seas below small craft advisory levels
through Friday.

SHORT TERM: A light pressure gradient over the waters Friday
night through Monday night should limit sustained winds up to
around 10 kt and seas up to 3 ft. The gradient should tighten
somewhat on Tuesday with winds up to 15 kt and seas up to around
4 ft possible.
-- End Changed Discussion --

&&

.CAR WATCHES/WARNINGS/ADVISORIES...
ME...None.
MARINE...None.

&&

$$


Near Term...CB/Norcross
Short Term...Maloit
Long Term...Maloit
Aviation...CB/Norcross/Maloit
Marine...CB/Norcross/Maloit