Princeton, Maine Weather Forecast Discussion

616
FXUS61 KCAR 201846
AFDCAR
Area Forecast Discussion
National Weather Service Caribou ME
246 PM EDT Sat Sep 20 2025
.SYNOPSIS...
High pressure builds in through Saturday night and exits to the
east Sunday night and Monday. A cold front crosses the area
Tuesday. High pressure builds in Wednesday and Thursday.
&&
.NEAR TERM /THROUGH SUNDAY NIGHT/...
Breezy NW flow continues today across the region as a pressure
gradient remains ahead of the approaching high to our west.
Strong subsidence associated with the high pressure is leading
to clear skies across the area. Tonight, the high becomes
centered over us and the relaxed pressure gradient should lead
to calm winds. In combination with clear skies, this should lead
to strong radiational cooling overnight with many areas in
northern and central Maine expected to be at or below freezing.
Areas farther south are likely to get down to the low to mid
30s. Thus have issued a Freeze Warning for areas in and north of
the Central Highlands, Upper Penobscot Valley, and northern
Washington county. Also issued a frost advisory for the Bangor
and Downeast regions. Have the greatest confidence in sub-
freezing temperatures in the North Woods and Aroostook county
while areas in northern Washington county will likely hover
around 32. Additionally, those areas in valleys will likely see
some of the coldest temperatures. Some patchy fog is also
expected in the river valleys, but this may be less in areal
extent than is typical due to the extensive dry air.
On Sunday, high pressure remains in place with sunny skies early
and a few clouds working in during the afternoon. Temperatures
will also recover to the mid to upper 60s. On Sunday night, some
clouds will prevent strong radiational cooling which should keep
temperatures in the upper 30s to lower 40s. Patchy valley fog is
also possible especially in those areas with the least cloud
cover.
&&
.SHORT TERM /MONDAY THROUGH TUESDAY/...
SW aloft will build the upr ridge over the area on Monday before
beginning to flatten during the afternoon. Temps will warm into the
70s over inland areas, which is still above normal over nrn zones.
Showers should just begin to enter CWA after 21z with.
Surface warm front lifts north of the area Monday evening with
lopres riding along boundary. Most of guidance keeps showers
confined to nrn areas Monday night before front begins to creep
south into the region Tuesday afternoon. Latest probabilities are
showing 30-45% across the north for 0.25" of 24-hr precip through
the end of the period, with 

NWS CAR Office Area Forecast Discussion