North Sullivan, Maine Weather Forecast Discussion

492
FXUS61 KCAR 061837
AFDCAR
Area Forecast Discussion
National Weather Service Caribou ME
237 PM EDT Sat Sep 6 2025
.SYNOPSIS...
A cold front finishes moving offshore tonight, stalling out over
the Gulf of Maine, with waves of low pressure riding along it
through Sunday. High pressure then builds over the area through
Monday night, then slowly exits to the east-northeast through
Wednesday. A couple of weak cold fronts then cross the area
Wednesday night and Thursday.
&&
.NEAR TERM /THROUGH SUNDAY NIGHT/...
Cold front and/or dewpoint front has dropped to between Presque
Isle and Houlton. This is noticeable on visible satellite
imagery and regional 88Ds. Showers are occurring north of the
front with storms marking the frontal boundary itself. Low
stratus has moved onto the Downeast coast with clearing over
interior Downeast. With marine layer over this area for most of the
morning, not sure how much this region can destabilize before
the sun sets.
SPC Mesoanalysis page showing a narrow ribbon of 500-1000 J/kg
of CAPE in the Bangor area and along the Rte 9 corridor into
interior Downeast. Latest guidance is showing main bulk of
strong-severe storms won/t move in until after 22z this evening.
It appears to be keying in on the storm complex moving into the
Berkshires at this time. Whether this complex can maintain
itself or become more elevated with time is the main question.
Thinking is that storms will become elevated as they head east
late this afternoon and evening, with the damaging wind threat
diminishing. Cannot rule out locally heavy rainfall with any
storms that can move through the area but event that remains a
mystery, given the ongoing drought.
Cold front stalls offshore late this evening as another wave
rides up along it twd daybreak. This wave should bring another
area of rainfall to Downeast tomorrow morning into the
afternoon with a beneficial rainfall. All told amounts between
0.50-0.0 inches are expected over interior Downeast.
Low pressure will drive boundary to our south with clear skies
rapidly moving in Sunday evening into Monday morning. H8 temps
drop into the single digits and will bring Sunday night low into
the low-mid 40s acrs the north and around 50 along the coast.
&&
.SHORT TERM /MONDAY THROUGH TUESDAY/...
A northern stream trough crosses the area on Monday. The low
levels should be rather dry, so do not expect any precipitation.
There could be some mid and high clouds as it passes. Highs on
Monday should be around 5 degrees below normal.
The region is under SW flow aloft Monday night and Tuesday. With
no shortwaves of note passing over the area in the flow, it
should be dry with minimal cloud cover. With mainly clear sky
conditions Monday night and winds light to calm, should see
strong radiational cooling conditions. Undercut NBM guidance by
blending in NBM25th and NBM10th percentile. Have areas of frost
and patchy fog (where there is no frost) Monday night,
especially in deeper valleys. If the forecast does not change,
likely will be issuing the first frost advisory of
meteorological fall across at least portions of the North. Lows
Monday night should be around 10 degrees below normal and highs
on Tuesday a few degrees below normal.
&&
.LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/...
The region remains under SW flow aloft Tuesday night and
Wednesday and absent any embedded shortwaves it should be dry.
A series of northern stream shortwaves pass Wednesday night and
Thursday. With minimal moisture to work with, could see some
isolated showers across portions of the North, otherwise it
should be dry.
Northern stream troughing builds in Thursday night-Friday, then
exits to the east Friday night. Dry low to mid levels should
preclude any precipitation.
Northern stream shortwave ridging should transit the area
Saturday, with associated subsidence keeping things dry.
Temperatures should be below normal Tuesday night, near normal
Wednesday and Wednesday night, then below normal Thursday-
Saturday.
&&
.AVIATION /18Z SATURDAY THROUGH THURSDAY/...
NEAR TERM: BHB will vary between IFR and low MVFR through the
nighttime hours. Cannot rule out tstms in the vicinity of
terminal in the evening hours. Cold front moves through around
midnight with light north winds expected through Sunday morning.
BGR will have the best chance for seeing tstms late afternoon
into the evening hours with MVFR restrictions. Cold front passes
late in the evening with terminals improving briefly to VFR
before dropping with next batch of showers expected Sunday
morning.
HUL will see MVFR showers, and possibly a tstm, over the next
3-6 hours. Conditions improve to VFR after cold frontal passage.
Northern Aroostook terminals will be VFR initially before
dropping to MVFR cigs and vsbys in showers. Showers come to an
end with cold front passage late tonight.
Cannot rule out MVFR/IFR conditions over Downeast terminals
during the day Sunday before improving to VFR late Sunday night.
SHORT TERM:
Monday-Monday evening...VFR. W-NW winds G15-20KT possible
Monday afternoon.
Late Monday night-Tuesday morning...MVFR or lower possible in
patchy fog near river valleys, otherwise VFR.
Tuesday afternoon-Thursday...VFR. NW-N winds G15-20KT possible
Thursday.
&&
.MARINE...
NEAR TERM: Seas will range from 3-5 feet until later this
evening when they begin to diminish. Winds will gust toward
25kts before dropping after sunset. Winds and seas will remain
below small craft through Sunday night.
SHORT TERM: A relaxed pressure gradient over the waters Monday-
Thursday should limit sustained winds to 10 kt or less and seas
to 3 ft or less.
&&
.CAR WATCHES/WARNINGS/ADVISORIES...
ME...None.
MARINE...Small Craft Advisory until 11 PM EDT this evening for ANZ050-
     051.
&&
$$
Near Term...Buster
Short Term...Maloit
Long Term...Maloit
Aviation...Buster/Maloit
Marine...Buster/Maloit

NWS CAR Office Area Forecast Discussion