Hudson, New Hampshire 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

740
FXUS61 KGYX 190546
AFDGYX

Area Forecast Discussion
National Weather Service Gray ME
1246 AM EST Fri Dec 19 2025

.SYNOPSIS...
A strong cold front pushes toward the region early today, with
rain chances increasing. Southerly wind gusts in the 50 to 60
mph range will be possible by this afternoon, especially near
the coast. This will also send temperatures climbing into the
40s and 50s in places ahead of the front. After maybe a brief
start as snow in the highest elevations, all rain is expected
across the area. Snow melt is unlikely to cause flooding, but
some areas may lose all the current snowpack. As the front
crosses the area, temperatures will begin a steady decline into
the 20s by Saturday morning. A weak system will cross north of
the area Saturday night, but only light snow or snow showers are
expected. Another clipper is then possible by Tuesday.

&&

.NEAR TERM /THROUGH TODAY/...
Key Messages:

*Impacts from the incoming wind and rain gradually increase this
 morning and peak in the late morning west and mid afternoon
 east.

*Damaging south-southeast winds are likely along the coast from
 Cape Elizabeth to points northward on and near the coast.

*Bouts of moderate to heavy rain are expected. Flood risk is
 low due to ongoing drought conditions with further details in
 the Hydrology section below.

*Temperatures drop quickly tonight and any standing water will
 likely freeze by midnight.

Overall little change to the going forecast for today as the latest
guidance has generally settled into a reasonable steady
solution. The main story continue to be the winds today. S-SE
winds will increase this morning and peak this afternoon.
Forecast soundings continue to confirm the presence of a
90-100KT LLJ between 3 and 6 KFT. This along with a tight
pressure gradient will supply plenty of strong S-SE wind gusts
between 40 and 55 knots depending on location (strongest coast).
This would cause tree damage and thus power outages.

Rain will be heavy at times as well, as there should be
embedded convection with heavy downpours. Didn`t mention thunder
in the forecast at this time, but a few rumbles here and there
can`t be ruled out.

&&

.SHORT TERM /TONIGHT THROUGH SATURDAY/...
Key Messages:

*Temperatures drop quickly tonight and any standing water will
likely freeze by midnight.

Colder air quickly overspreads the area early tonight bringing
the threat for icing. However, if the winds pick up quickly, the
threat for widespread black ice drops significantly. There will
also be period of gusty west winds behind the front with gusts
to 55 mph within mountain zones and around 40 mph south of the
mountains.

A secondary cold front should be located somewhere near the
Maine coast Saturday morning, which will move well out to sea
through the day. A few upslope snow showers will be possible
over the mountains and vicinity, but Saturday should see mainly
dry conditions across the forecast area as high pressure moves
in. Pressure rises and cold air advection should lead to some
good mixing on Saturday afternoon, but soundings suggest we will
only see winds up to 20 knots or so at the top of the mixed
layer. Thus, it will be cooler on Saturday than it was on Friday
but winds should be much less (but still a bit breezy). Highs
Saturday afternoon should generally be around average for this
time of year, mainly in the mid to upper 20s across the north,
to the mid to upper 30s south and along the coast. A few lower
40s will be possible along the coast.

&&

.LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...

Evening Update...

No major updates to the long term as a cooler pattern returns
with multiple chances for light precip. A weak Alberta clipper
brings some light snow showers to northern areas Saturday night
into Sunday, while highs warm into the 40s along the coast
Sunday. A cold front moves through with the clipper, bringing a
cold shot of air for Monday with highs in the teens and 20s.

A clipper with some more moisture arrives late Tuesday into
Wednesday, bringing the best chance for a white Christmas
snowfall. At this point snowfall amounts would most likely be
light, but a few inches are possible. Seasonable conditions
most likely follow into Christmas Day, with another system then
possible late next week.

Full Discussion...

An upper ridge axis moves east Saturday evening as we
transition back into southwest flow aloft. The next shortwave
then starts to nudge in late Saturday evening, quickly moving
through the region on Sunday. For now, the best light snow
chances (30 to 60 percent) are favored over the central and
north along/behind the next cold front, with the highest chances
near the International border. Most of the snow should mainly
move out on Sunday morning, but we will likely see some upslope
snow showers in the mountains through at least the afternoon,
potentially lingering into Sunday night and maybe even into
Monday. Highs on Sunday should be above normal (but it will be
breezy) with highs in the upper 20s and lower 30s north, to the
low to mid 40s south. It will be colder Monday behind the front
with the NBM suggesting highs only ranging from the low to mid
teens north, to the mid to upper teens south. Northwest winds
will once again be fairly breezy so Monday will be blustery.

Ridging crosses the forecast area again Monday night in advance
of the next shortwave trough that will impact the region mainly
on Tuesday. Widespread low to medium light snow chances will be
possible through the day on Tuesday with what looks to be
minimal impact at this time. Wednesday may see some lingering
upslope snow showers in the mountains but Thursday should mainly
be dry as the next ridge moves in. Highs Tuesday through
Thursday will mainly range from the low to mid 20s north, to the
low to mid 30s south.

&&

.AVIATION /02Z FRIDAY THROUGH TUESDAY/...
Short Term...IFR/LIFR develop by dawn. A strong southerly low
level jet ahead of a cold front will bring LLWS from 04Z through
18Z today. Surface winds will gust up to 50 kts near the coast
and 40 kts across the interior. Periods of moderate to heavy
rain and low cigs continue IFR/LIFR through 18Z to 00Z with
drier air improving conditions Friday night. A period gusty west
winds to 35 kts is likely Friday night behind a cold front.
Saturday should mainly see VFR conditions, except at HIE
and LEB where MVFR ceilings are more likely in upslope flow.


Long Term...A period of MVFR conditions are possible late
Sunday across northern terminals as a period of light snow is
possible. VFR conditions return on Monday, with another system
possibly bringing more restrictions late Tuesday.

&&

.MARINE...
Short Term...Southerly winds increase early today ahead of a
cold front with Storm Warnings now in effect for all waters
today and this evening. Gales likely needed tonight into
Saturday morning in the wake of the cold front.

Long Term... SCA conditions in southwesterly flow are possible
Sunday as an Alberta clipper tracks north of the waters.
Northwesterly gales are then possible behind the front on
Monday.

&&

.Hydrology...

Key Points
-The overall flood risk remains low due to the ongoing drought
 despite an efficient snowmelt event and heavy rainfall today.
-River ice is expected to break up and could cause some localized
jams with a non-zero risk of backwater flooding, however initial low
stream levels suggest it would take a strong jams with high flows to
result in any flooding.
-Efficient and rapid snowmelt expected


South/Southeast facing slopes will be the bullseye for heaviest
rainfall due to orographic lift, looking at 1.5-2" possible in these
areas. The rest of the region can expect under an inch. The snowpack
has been warming the last few days. Areas with depths <4" will
rapidly ripen and be primed to melt out during the event.
Dewpoints will be over 40F for much of the day, and even above
freezing for over 24 hrs. Even higher terrain will see hours of
dewpoints in the 40s. This in combination with strong winds will
ablate the snow rapidly, and areas of highest Td and wind
(Kennebec Valley and eastward) will see a SWE loss around 1", or
approximately 4-6" depth. Basins west will see slightly less
effective melt, but anyone with 4" depth can expect most if not
all of it to melt out apart from snowbanks. The mountains will
undergo compression with higher losses under 2k ft. Flooding
concerns will be localized as rapid runoff over frozen ground
can cause minor washouts on dirt roads during periods of rapid
thaw, but this will be focused more in the mountains. Mainstem
rivers have substantial storage due to the drought, so flooding
is not likely. River ice is prevalent across the region, and
there will be enough stream rise for mechanical break-up. The
ice is expected to floe but not flush for most, meaning it is
likely to shift the ice downstream which will then freeze in
place later this weekend. Ice thicknesses could be >4" in
northern streams, so any jams will need to be monitored for any
backwater concerns.

&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...Wind Advisory from 8 AM Friday to 8 AM EST Saturday for
     MEZ007>009.
     Wind Advisory from 8 AM to 7 PM EST Friday for MEZ012>014-
     018>023-033.
     High Wind Warning from 8 AM to 7 PM EST Friday for MEZ024>028.
NH...Wind Advisory from 8 AM Friday to 8 AM EST Saturday for
     NHZ001>005.
     Wind Advisory from 8 AM to 7 PM EST Friday for NHZ006>015.
MARINE...Storm Warning from 8 AM to 7 PM EST Friday for ANZ150>154.

&&

$$


NEAR TERM...Ekster/Schroeter
SHORT TERM...Ekster/Schroeter
LONG TERM...Clair/Hargrove