-- Discussion containing changed information from previous version are highlighted. --
332
FXUS61 KCAR 221725
AFDCAR

Area Forecast Discussion
National Weather Service Caribou ME
125 PM EDT Wed May 22 2024

.SYNOPSIS...
Weak mid and upper level features cross the area today
as surface high pressure remains along the eastern seaboard. A
strong cold front will crosses the area Thursday, followed by
high pressure Friday into the weekend.

&&

.NEAR TERM /THROUGH TONIGHT/...
-- Changed Discussion --
1pm Update...
Only very isolated light showers at this hour. Still can`t rule
out some increased shower/storm activity as the afternoon wears
on, but have decreased area of coverage and lowered PoPs due to
current inactivity. Best shot at an isolated storm is from the
Central Highlands east to Millinocket and Lincoln. Warm
afternoon with temperatures around 80. Bangor reached 80 for the
first time this season.

previous discussion... Warm and somewhat humid conditions can
be expected today with afternoon highs away from the coast
forecast to climb into the low 80s. With dew points expected to
rise into the lower 60 it will feel a bit on the muggy side. The
main forecast challenge today will be with regard to the
development of any scattered showers or isolated thunderstorms.
Yesterdays weak dew point boundary will continue to linger
across central areas and would likely be the focus for any
activity this afternoon. Any thunderstorms that develop are
expected to be isolated at best, as warming temperatures aloft
should inhibit much in the way of convective development this
afternoon.

Low pressure track well to our northwest across central Canada
tonight with a trailing cold front approaching from the west,
and a weak warm front lifts northeast across the area. There is
some instabilty aloft indicated, so have included mention of
isolated thunderstorms overnight along with scattered showers.
Patchy fog will also be possible. Lows tonight will be near 60
for most areas.
-- End Changed Discussion --

&&

.SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/...
Cold front likely to be bisecting CWA Thursday morning with showers
ongoing over nrn zones after daybreak. Given extensive cloud
cover in the morning tstms likely won`t develop until around
17z. MUCAPES on the order of 1000-2000 JKG-1 along with 30-40kts
of shear and inverted-v soundings may lead to locally damaging
winds with any storm that develops along of and ahead of the
front. Temps on Thursday will climb into the m/u 70s across the
north, around 80 over interior Downeast and remaining cool along
the shore owing to fairly cold ocean temps and onshore flow
ahead of the front. Stable marine layer will keep storms inland
from the coast in the afternoon.

Skies will clear in wake of fropa Thursday night with temps
dropping back into the 50s Friday morning. Winds will remain out
of the west overnight ahead of secondary front dropping out of
Canada.

Upr trof along with secondary front will be located just to the
northwest of the St. Lawrence by 12z Friday. With cold pool and
front expect skies to cloud up throughout the morning. A line
of showers will develop in the afternoon and with low frzg
levels cannot rule out afternoon storms acrs the north capable
of producing hail.

As reinforcing shot of cold air occurs with fropa temps will be able
to drop into the lower 40s over portions of the North Woods under
clearing skies. H8 temps drop twd 0C by 09z Saturday but with winds
remaining elevated expect that mins will remain above the
middle- 30s and prevent much in the way of patchy frost
developing.

&&

.LONG TERM /SATURDAY THROUGH WEDNESDAY/...
Brief upr ridge builds into area on Saturday with mostly sunny
skies expected. Cannot rule out an isolated shower Saturday
night with s/wv zipping through in zonal flow before med range
guidance begins to disagree on upr air pattern.

By 12z Sunday forecast starts to go off the rails with GFS/CMC
bringing upr low into Ontario with warm front approaching from
the west and increasing shower chances during the day. Latest EC
has fairly weak flow over the region late in the weekend.

After this point large-scale synoptic storm will be moving into
the Great Lakes with pw values ahead of it increasing to near
1.50 inches. At this time it appears that rain will begin to
increase on Memorial Day with off and on rain thru the end of
the period.

&&

.AVIATION /18Z WEDNESDAY THROUGH MONDAY/...
-- Changed Discussion --
NEAR TERM:
This Afternoon...VFR areawide. A few isolated showers/storms,
mainly central portions of the area N of BGR and S of PQI. Have
not included any mention in TAFs due to very isolated nature of
activity. Generally light and variable winds this afternoon.

Tonight and Thursday...Starting out VFR early tonight. Likely
remaining VFR through the night for Downeast, including BGR/BHB.
Can`t totally rule out some low clouds from time to time
especially BHB late tonight, but didn`t have enough confidence
to include in TAF. For the north, including areas from HUL N,
reasonably high confidence in a period of IFR ceilings with an
area of showers from roughly 8-13z. Could be an embedded rumble
of thunder, but didn`t put in TAF because not enough confidence.
Generally VFR areawide late morning into the afternoon Thursday.
However, a line of showers/storms is likely in the early to mid
afternoon, progressing from W to E through the area. These
storms could bring briefly gusty winds and MVFR/IFR conditions
before conditions improve to VFR again after approximately 20z.
Winds generally light tonight, become S 5-10 kts Thursday
morning, switching to the SW late afternoon.



SHORT TERM:
Thursday...VFR with tempo IFR in afternoon storms. SW 5-15kts.

Thursday night...VFR. WSW 5-10kts.

Friday...VFR tempo MVFR across northern Aroostook terminals in
possible afternoon storms. SW 5-15kts.

Friday night-Saturday...Mainly VFR. WNW 5-15kts.

Saturday night-Sunday...VFR then lowering to MVFR Sunday morning
in showers. Lgt/vrb Saturday night becoming SSE 5-10kts Sunday.
-- End Changed Discussion --

&&

.MARINE...
NEAR TERM: Winds/seas remain below SCA levels through tonight.
Visibility may be reduced to 1 to 3 NM at times tonight.



SHORT TERM: Winds likely to remain below SCA levels though may
approach 25 kts Thu evening and again Fri evening behind cold
fronts. Seas range from 2-4 feet during the period. Visibilities
will be reduced Thursday and Thursday night.

&&

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

&&

$$


Near Term...TWD/Foisy
Short Term...Buster
Long Term...Buster
Aviation...TWD/Foisy/Buster
Marine...TWD/Foisy/Buster