South Berwick, Maine 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

756
FXUS61 KGYX 250841
AFDGYX

Area Forecast Discussion
National Weather Service Gray ME
Issued by National Weather Service Caribou ME
441 AM EDT Fri Apr 25 2025

.SYNOPSIS...
Today will be another warm day as south winds ahead of an
approaching storm system move into the region. Showers are
possible this afternoon before more widespread rain moves into
the area Saturday as an area of low pressure moves across New
England. Rain showers and higher elevation mountain snow showers
linger on Sunday with a cool mostly cloudy day. High pressure
and warm weather returns by Monday.

&&

.NEAR TERM /THROUGH TONIGHT/...
Stalled weak boundary over northern New England is bringing clouds
to northern NH into southern Maine with very little in the way
of showers making it to the ground in NH. Boundary will continue
to push south and becoming quasi-stationary over srn half of the CWA
this morning, leaving a mostly to party sunny morning on tap.
Weak wave will ride along the boundary with srly flow drawing
boundary back north as a warm front this afternoon. H8 temps
warm to +10C with maxes climbing up into the upr 70s again over
srn NH and around 70 over interior Maine and up into the
foothills. Onshore flow will keep coastal areas cool today.

Warm advection showers will lift north this evening into the
overnight hours with a quick few hundredths of an inch to 0.10
inches as it lifts into nrn Maine. A brief break in the showers
will leave patchy drizzle across most of the area late tonight
before surface low deepens over upstate NY.

&&

.SHORT TERM /SATURDAY/...
Sfc low deepens to our west during the day Saturday with 40-50kt
LLJ drawing extensive moisture into the region. PW values look
to rise above 1.00 inches, which is in the upper 90th percentile
for this time of year. Region looks to be in the warm sector on
Saturday with enhanced lift along the coastal front. Cannot rule
out rainfall amounts approaching 1 inch Saturday morning along
the coast and into the foothills. Elevated instability looks to
be present over southern NH and will continue with mention of
slgt chc for thunder in this area Saturday afternoon.

&&

.LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
440 am update...Surface low will be moving through southern
Maine Saturday night where showers continue through Sunday as
upper low drifts over the area. Still expecting a cloudy and
cool day on Sunday. H5 ridge will build in on Monday with next
chance of rain moving in Tuesday evening.

Pattern Overview: A 500mb trough and surface low pressure will
swing through the region over the weekend bringing widespread
rain Saturday, with shower activity lingering most of Sunday.
The system departs Sunday night with a ridge building in for the
first part of the week. Shower chances return midweek as a
trough swings through Wednesday along with the passage of a cold
front. Thursday looks dry behind the front.

Details: Sunday and Monday: Low pressure slides offshore
Sunday, but the trend in this progression has been to slow it
down, so shower activity may linger through most of Sunday. At
the least it will be mostly cloudy with some breaks in the
stratus heading toward the evening hours. High temperatures will
be limited to the 50s south of the mountains, and mid to upper
40s to the north. Skies clear overnight Sunday, but likely not
quick enough for radiational cooling to be a factor, so low
temperatures look to end up in the upper 30s and low 40s. Monday
features clear skies and flow turning southwesterly, beginning
to usher in a warmer airmass. High temperatures south of the
mountains look to get into the upper 60s and low 70s, with low
to mid 60s to north. Low temperatures bottom out in the 40s
areawide.

Tuesday-Thursday: Established southwesterly flow makes Tuesday
the warmest day as 850mb temps exceed +10C. This translates to
mid- to upper 70s across much of the interior. The coast may end
up more in the mid 60s as flow turns onshore in the afternoon.
Clouds and shower chances will also be on the increase through
the evening ahead of an approaching front. Global models
currently keep the front and trough in the region Wednesday and
thusly shower chances during the day will stay as well. Shower
chances decrease overnight as the front and trough depart. This
should put us back in the clear for Thursday with a cooler
airmass.

&&

.AVIATION /08Z FRIDAY THROUGH TUESDAY/...
Short Term...VFR through the day Friday with southern NH
terminals possibly diminishing to low MVFR/IFR toward end of
TAF valid time. Warm front lifting through in the afternoon/evening
will bring VFR showers most terminals.

Long Term...Widespread rain will bring about some MVFR
restrictions, with IFR restrictions possible in areas of heavier
rain, Saturday and Sunday. Ceilings trend back to VFR for
Monday and Tuesday. Tuesday night is the next chance for low
ceilings and showers to bring about restrictions. Thunderstorms
are possible at HIE and LEB with the passing of the front
Tuesday night.

&&

.MARINE...
Short Term...Winds and seas remain below small craft levels
today and tonight, before ramping up Saturday morning. SCA
conditions continue into the day Saturday.

Long Term...SCA conditions are likely Saturday night as low
pressure slides over the waters ramping up southerly wind gusts
and waves to 6-8ft. Winds gusts taper off as winds shift around
to northerly for Sunday, but seas will take longer to fall below
SCA criteria. By Monday conditions should fall below SCA
criteria and stay below through Tuesday.

&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...None.
NH...None.
MARINE...Small Craft Advisory from 6 AM Saturday to 8 PM EDT Sunday for
     ANZ150-152-154.
     Small Craft Advisory from 10 AM Saturday to 2 PM EDT Sunday
     for ANZ151-153.

&&

$$

SYNOPSIS...Dumont/Buster
NEAR TERM...Buster
SHORT TERM...Buster
LONG TERM...Dumont/Buster
AVIATION...Dumont/Buster
MARINE...Dumont/Buster