Weirs Beach, New Hampshire Weather Forecast Discussion

473
FXUS61 KGYX 120524
AFDGYX
Area Forecast Discussion
National Weather Service Gray ME
124 AM EDT Fri Sep 12 2025
.SYNOPSIS...
High pressure will maintain dry conditions into the weekend
with warm sunny days and cool nights with patchy frost across
the north. A weak system slides southeast out of Canada Saturday
night and Sunday bringing slight chances for showers. Wetting
rainfall is unlikely. High pressure returns Monday and will
remain in control through the middle of next week.
&&
.NEAR TERM /THROUGH TODAY/...
High pressure builds in today in the wake of a cold front.
Mostly sunny skies are expected high temperatures in the lower
to mid 70s. An afternoon seabreeze is expected.
&&
.SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY/...
Fair weather continues tonight. A weak short wave trough passes
through but will only be accompanied but an increase in mid and
high level clouds. Low temperatures will be high enough to
preclude frost advisory headlines. On Friday, fair weather with
slightly above normal conditions are expected.
&&
.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
Evening Long Term Update...No large change in guidance for this
update. Sunday disturbance remains weak with little synoptic
supporters for more than a tenth of an inch of precip. A couple
locations in southern NH could pick up this amount w/ daytime
instability, but deeper moisture is well outside of the region. With
expected surface high pressure in the region Mon- Tues, did
trend Mon night temperatures lower.
Previously...
The upper jet will largely remain north across Canada through
the long term period resulting in slow moving and poorly
organized mid level features over the CONUS. A splitting trough
will cross Quebec this weekend that will bring slight chances
for showers into Sunday. Surface high pressure then builds in
Monday and likely keeps the forecast area dry through the middle
of next week.
Chances for showers will increase into Sunday. Forcing will be
weak with the splitting trough so appreciable rain is not
expected with PoPs topping out at 20 percent. Highs on Sunday
will generally be in the 70s.
High pressure builds in from the northwest Monday and will
generally hold over the Northeast through Wednesday. This will
allow for warm sunny days and cool nights. An upper low over the
Southeast will drift northward the second half of the week and
may spread moisture into the region while there is little to no
signal for a widespread wetting rain on the horizon.
&&
.AVIATION /04Z FRIDAY THROUGH TUESDAY/...
Short Term...VFR conditions are expected through Saturday other
than late night and early morning valley fog.
Long Term...Mainly VFR through the period. The exception will
be the potential for nighttime valley fog most nights that could
bring restrictions to KLEB and KHIE.
&&
.MARINE...
Short Term...Winds and seas will remain below SCA thresholds.
Long Term...Winds and seas will remain below SCA thresholds. A
weak system crossing southeast Canada will bring an increase in
south to southwest flow into Sunday while gusts will only top
out around 20 kts.
&&
.GYX WATCHES/WARNINGS/ADVISORIES...
ME...Frost Advisory until 8 AM EDT Friday for MEZ007>009.
NH...Frost Advisory until 8 AM EDT Friday for NHZ001-002.
MARINE...None.
&&
$$
NEAR TERM...Ekster
SHORT TERM...Ekster
LONG TERM...Schroeter/Cornwell

NWS GYX Office Area Forecast Discussion