Loudon, New Hampshire Weather Forecast Discussion

323
FXUS61 KGYX 161756
AFDGYX
Area Forecast Discussion
National Weather Service Gray ME
156 PM EDT Tue Sep 16 2025
.SYNOPSIS...
High pressure remains in place across New England through
Thursday. Temperatures moderate through the week and with
continued dry weather, drought conditions will deepen. A cold
front moves through Thursday night. High pressure follows for
the weekend, bringing a fresh cool and dry airmass to New
England. Mainly dry conditions continue for at least the next
week.
&&
.NEAR TERM /THROUGH TONIGHT/...
High pressure remains in place across New England tonight,
while low pressure remains stalled along the Mid Atlantic coast.
High clouds continue to dissipate as they move northward from
the low through the overnight. The airmass continues to modify
with high pressure in place, so temps look to be warmer than the
last few nights with lows mainly in the 40s. Fog is expected
across the northern and Connecticut River Valleys again tonight.
Some patchy radiation fog is also possible toward the coast as
moisture has increased through the day today, and temps drop
this evening.
&&
.SHORT TERM /WEDNESDAY THROUGH WEDNESDAY NIGHT/...
More clouds help to keep temps down by a few degrees along the
coast and into southern locations as the storm south of New
England moves a little closer. This yields a fairly uniform day
of highs in the mid 70s across Maine and New Hampshire.
Wednesday night brings the chance for some scattered shower
activity to southern and coastal locations as the low makes it`s
closest pass to the south. These would be brief and bring
little rainfall, and will also dissipate by the time they reach
central Maine and New Hampshire. The best chance to see any rain
from these will be late tomorrow night toward daybreak. Further
north, dry conditions continue as lows drop into the 40s.
&&
.LONG TERM /THURSDAY THROUGH TUESDAY/...
Southerly flow brings in warm temperatures for Thursday ahead
of a cold front will cross Thursday evening into Thursday
night. Temperatures are expected to top out in the mid 70s to
low 80s, except a few degrees cooler toward the Midcoast.
Slightly higher moisture associated with a coastal low off the
Mid- Atlantic may allow for a couple of showers near the coast,
but otherwise it looks too dry for precip with this front.
However, the mountains may see a few showers behind the front
with upslope flow Thursday night.
Friday will be a dry and breezy day, especially when a
secondary front moves through in the afternoon. Before the front
crosses, temperatures look to reach the 70s in south of the
mountains and then 60s in the mountains. Behind this front,
Canadian high pressure builds in bringing the first dose of
Arctic air of the season with good radiational cooling,
especially across the north. The need for frost/freeze headlines
may be needed as lows in the 30s are looking more likely away
from the coast Friday night and Saturday night with 20s
possible across the north. Highs on Saturday will be limited to
the 60s, but by Sunday temperatures should be closer to 70 as
high pressure starts to shift east.
Temperatures will continue to moderate early next with
southerly flow and high pressure east of the region. However,
there continues to be little signal for meaningful rainfall as
the upper air pattern favors ridging across the area, likely
keeping any disturbances either to our north or to the south.
&&
.AVIATION /17Z TUESDAY THROUGH SATURDAY/...
Short Term...LIFR conditions in valley fog are expected again
tonight at LEB and HIE, and possible again Wednesday night.
Elsewhere, MVFR to IFR conditions are possible at times late
tonight in patchy radiation fog. VFR prevails tomorrow, and then
some scattered showers and MVFR conditions are possible along
the coast Wednesday night.
Long Term...Primarily VFR from Thursday through Saturday, but a
period of MVFR ceilings and maybe a rain shower will be
possible Thurs night at LEB and HIE. There may also be valley
fog at these locations Friday night and Saturday night.
&&
.MARINE...
Short Term...Conditions remain below SCA levels through
tomorrow night as high pressure remains in place across the Gulf
of Maine, and low pressure remains stalled south of New
England.
Long Term...Southerly flow will be in place Thursday as a cold
front approaches and then crosses Thursday night. Winds shift to
north to northwesterly behind this front, and then a secondary
front crosses during the day on Friday, with north to northwest
winds potentially reaching SCA levels as strong high pressure
builds in from the northwest. The high builds overhead over the
weekend with winds and seas subsiding. The high shifts east by
Sunday night into early next week with southerly flow possibly
reaching SCA levels at times.
&&
.GYX WATCHES/WARNINGS/ADVISORIES...
ME...None.
NH...None.
MARINE...None.
&&
$$
NEAR TERM...Clair
SHORT TERM...Clair
LONG TERM...Combs

NWS GYX Office Area Forecast Discussion