524
FXUS61 KCAR 181815
AFDCAR

Area Forecast Discussion
National Weather Service Caribou ME
215 PM EDT Fri Sep 18 2026

.WHAT HAS CHANGED...
- Confidence has decreased in frost potential for tonight and
  Saturday night.

&&

.KEY MESSAGES...
1) Potential for patchy frost Saturday night across the north.


&&

.DISCUSSION...

KEY MESSAGE 1...Potential for patchy frost Saturday night across
the north.

KEY MESSAGE 1 DESCRIPTION...
High pressure will be building in Saturday evening from Canada.
Movement of the high will determine how low temps can drop
Saturday night into Sunday morning. Confidence in frost
potential has decreased due to ensemble models pointing to a
thicker cloud deck much earlier in the evening. Upper air model
soundings indicate the weak winds at the surface, however,
surface dewpoints should be much lower. Thus, lower RH values
which should keep frost potential low. Due to the uncertainty,
kept frost in the forecast for consistency.


&&

.AVIATION /18Z FRIDAY THROUGH WEDNESDAY/...
Rest of Today-Saturday night...VFR for all terminals. Gusty NW
winds will decrease this evening and tonight, but remain breezy
at 5-15 kts. By Saturday afternoon, NW winds will decrease to
around 5 kts, then light and variable Saturday night.

Sunday...VFR/MVFR in rain showers at Downeast terminals. S
winds between 5 to 10kts, gusting to near 20kts Downeast.

Sunday Night...VFR. Winds will be light and variable. Patchy
fog possible at all terminals.

Monday-Tuesday Night...VFR. N/NW winds 5-10 kts, gusts to 20
kts.

Wednesday...VFR. NE/E winds at 5-10 kts.

&&

.MARINE...
Seas will remain below 5ft across all waters through Wednesday.
NW winds between 10 and 15kts with gusts up to 20kt, reaching
30kts in outer waters, are expected in coastal waters Friday
night. NW winds will diminish through Saturday turning SSW on
Saturday afternoon.

Winds and seas remain below small craft levels through Monday. NE
wind gusts increase to 25kts for waters from 25-60NM late Monday
night into Wednesday morning as pressure gradient tightens between
high pressure north and track of low pressure south of the waters.
Visibilities may be reduced in fog Sunday night.

&&

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

&&

$$

DISCUSSION...ARL/MC
AVIATION...ARL/MC