Pembroke, New Hampshire 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

283
FXUS61 KGYX 311929
AFDGYX

Area Forecast Discussion
National Weather Service Gray ME
329 PM EDT Sat May 31 2025

.SYNOPSIS...
Another Saturday, another bucket full of rain. The worst of the
rainfall has come to an end, but another area of showers and
light rain will sweep through the local area this evening before
coming to an end. While a few showers will be possible in the
mountains on Sunday, it will mostly be cool and breezy. That
will continue into Monday before we start to warm things up and
dry out.

&&

.NEAR TERM /UNTIL 6 AM SUNDAY MORNING/...
Dry slot of the well defined low pressure encompasses much of
the forecast area at this time. Very light precip is still
occurring from the low clouds in the center...more like drizzle
than rain. Farther south where southern NH broke into sunshine
briefly...instability has built enough for some thunderstorms to
develop and slowly move eastward. Aside from some briefly
heavier rainfall rates...no significant impacts are expected
from these storms. As they continue to move north and east they
will lose their punch...as low clouds never cleared enough for
significant amounts of CAPE to develop in those areas.

However the tip of the comma head will rotate back thru the
forecast area. So a general increase in PoP for light rain is in
the forecast thru this evening. Clouds and showers will keep
temps near 50 overnight.

&&

.SHORT TERM /6 AM SUNDAY MORNING THROUGH SUNDAY NIGHT/...
Cool and breezy on Sun. Despite mostly sunny conditions south of
the mtns it will struggle into the lower to mid 60s. In addition
mixing heights look to tap lower level winds around 30 kt...so
widespread surface gusts around 25 kt are likely. Continued to
blend in a little hi-res guidance to keep those gusts in that
range. Upslope rain showers will be likely in the mtns on west
northwest winds.

Sun night will continue to be somewhat mixed...and so even with
colder temps aloft...the min temps for the night should remain
in the 40s.

&&

.LONG TERM /MONDAY THROUGH SATURDAY/...
Overview: Upper level low set to remain influencing the region
through Monday night as sharpening trough finally pushes off to the
east. Mostly dry conditions are then forecast Tuesday through
Wednesday night with daytime temperatures increasing into the 80s by
midweek. Next system to bring the chance of rain will be later this
week as a slow moving frontal boundary approaches and settles over
the forecast area.

Details: Broad upper low from this weekend will continue to pivot
northward. This will really widen the upper trough across
southeastern Canada and northern New England. Embedded wave will
round the base of the trough Monday, continuing the chance for rain
showers during the day. These continue to be more likely in the
mountains vs. locations towards the coast, and QPF is light. The
introduction of anticyclonic flow and drier air aloft will promote
dry conditions overnight into Tuesday, continuing Wednesday.

With rain out of the picture early to midweek, attention turns
towards temperatures. From daytime highs in the 50s and 60s this
weekend, a quick warm up is expected with highs in the 80s forecast
Wednesday. Tuesday, behind the exiting trough and ahead of upper
moisture, is forecast to be the sunnier of the two.

Late week remains warm as slowing cold front passes through the
Great Lakes. Still a lot of continuity and coverage uncertainty for
rain chances late week. Overall expectation is for this boundary to
continue eastward slowly, acting as forcing for showers and periods
of rain Thursday into the weekend. With surface high planted off the
Southeast coast, flow will align to bring moisture towards the
region as well as occasional waves of low pressure. Will continue to
monitor rain chances into next weekend, but the current pattern of a
rainy Saturday is certainly possible again.


&&

.AVIATION /19Z SATURDAY THROUGH THURSDAY/...
Short Term...Areas of IFR/LIFR are slowly improving as dry slot
continues to move over the forecast area. Pockets of VFR will be
possible...but I am generally hedging towards MVFR CIGs and
local MVFR VIS in showers. That will come to an end tonight as
the low center passes east of your longitude. The exception will
be HIE...where upsloping will continue MVFR CIGs and occasional
showers. Surface gusts of 25 kt look possible at all terminals
Sun.

Long Term...VFR ceilings and vis for much of early to mid week.
Winds will largely be diurnally driven. Can`t rule out some
overnight valley fog for terminals near the CT Valley and
western ME mountains through this period.

&&

.MARINE...
Short Term...As low pressure curls northeast and winds become
northwesterly they will increase. A defined front should push
across the waters from southwest to northeast late this evening
as SCA conditions move in behind it. SCAs remain in effect for
all waters...as conditions remain gusty thru Sun.

Long Term...Upper trough will sharpen early this week as high
pressure builds to the south. This will result in mainly
southerly onshore winds through early week. By late week, front
will be slowly approaching the region but may not pass through
the waters until Friday/Saturday.


&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...None.
NH...None.
MARINE...Small Craft Advisory until 8 PM EDT Sunday for ANZ150-152-154.
     Small Craft Advisory from 11 PM this evening to 8 PM EDT
     Sunday for ANZ151-153.

&&

$$

NEAR TERM...Legro
SHORT TERM...Legro
LONG TERM...Cornwell
AVIATION...Cornwell/Legro
MARINE...Cornwell/Legro