Chelsea, Maine Weather Forecast Discussion

924
FXUS61 KGYX 081742
AFDGYX
Area Forecast Discussion
National Weather Service Gray ME
142 PM EDT Mon Sep 8 2025
.SYNOPSIS...
A series of high pressure centers remain in control of our
weather through the week and into the weekend. The daytime
temperatures will be seasonable with fair weather and the
overnights will be cool. There may even be some low to mid 30s
and frost for the northern valleys tonight. Another extended
stretch of dry weather continues, with mainly dry conditions
expected through this weekend.
&&
.NEAR TERM /THROUGH TONIGHT/...
Impacts and Key Messages:
* A cold night is expected to bring at least patchy frost to
  northern zones tonight. A Frost Advisory is in effect.
High pressure continues to build and becomes centered overhead
tonight. This will bring about an excellent radiational cooling
setup with zonal flow aloft cooling 850mb temperatures to +3-6C.
This will result in temperatures nearing the freezing mark in
northern zones, bottoming out around 34-37F. This will be
sufficient enough for at least patchy frost, with locations that
get closer to 34F seeing a bit more. A Frost Advisory is in
effect for those zones that have the highest confidence in frost
development. The rest of the area will fall into the upper 30s
to mid 40s, with some locations on the immediate coast holding
in the upper 40s.
&&
.SHORT TERM /TUESDAY THROUGH TUESDAY NIGHT/...
Impacts and Key Messages:
* No significant weather impacts are expected.
Models continue to advertise a 1030mb high centered overhead
Tuesday resulting in clear skies and light winds. After a cold
night, high temperatures look to recover into the low 70s across
much of the area, but won`t go much higher than that with zonal
flow keeping 850mb temps +6-8C. Deep mixing will bring
dewpoints down into the low to mid-40s for much of the area, so
it will feel like a pleasant Fall day.
Skies look mostly clear Tuesday night, with the exception being
high clouds streaming into the coastal plain later in the night
from a low pressure system slowly advancing up the East Coast.
Timing should be sufficient enough for much of the area to
decouple and radiate leading to another cold night. Temperatures
fall into the mid- to upper 30s north of the mountains, and
into the low to mid-40s to the south. Flow shifts southwesterly
as broad troughing moves into the area and will act to warm
850mb temperatures, so it won`t get quite as cold as tonight
meaning frost development seems less likely. Valley fog remains
likely, although as low levels continue to dry it will be less
dense and less widespread.
&&
.LONG TERM /WEDNESDAY THROUGH MONDAY/...
Overview...
A large scale ridge across western North America keeps
seasonably cool and dry conditions in place through the week,
while a broad trough prevails across the Eastern US.
Details...
A series of weak troughs and ridges transit through the
Northeast this week with a broad trough across eastern North
America, while temperatures remain near to below normal through
the weekend. The warmest day looks to be on Thursday, as temps
climb into the mid to upper 70s ahead of an approaching cold
front on southerly flow. Otherwise, a series of high pressure
centers continue to bring fresh cool and dry airmasses through
the weekend.
Rain chances remain low through the week and into the weekend.
A wave of low pressure passes offshore on Wednesday, with the
chance for some scattered sprinkles along the coastline. A cold
front crosses through during the day on Thursday, but only
brings the chance for some isolated showers across the higher
terrain. Another dry front is likely to pass through late on
Sunday.
The main weather concern this week will be fire weather
conditions. Cool nights continue to help with fuel recovery, but
breezier and drier conditions behind the cold front late
Thursday and into Friday look to be the main timeframe of focus
for some greater fire weather conditions.
&&
.AVIATION /18Z MONDAY THROUGH SATURDAY/...
Short Term...VFR generally prevails through Tuesday night, with
LEB and HIE likely to see impacts from valley fog tonight and
Tuesday night.
Long Term...VFR prevails through the weekend during the daytime
at all terminals. Nighttime valley fog is likely each night at
LEB and HIE, and possible at all other terminals each night as
well.
&&
.MARINE...
Short Term...Winds gusts and seas are expected to stay below
SCA criteria through Tuesday night as high pressure remains
dominant over the waters. Winds shift to out of the northeast
overnight with a seabreeze developing Tuesday afternoon with
gusts less than 15kts. Seas remain generally 2-3ft.
Long Term...Conditions look to remain below SCA levels into the
weekend as a series of high pressure centers transit through
the Gulf of Maine. A weak cold front likely crosses the waters
late Thursday, and then another one is likely late in the
weekend.
&&
.GYX WATCHES/WARNINGS/ADVISORIES...
ME...Frost Advisory from 2 AM to 8 AM EDT Tuesday for MEZ007.
NH...Frost Advisory from 2 AM to 8 AM EDT Tuesday for NHZ001-002.
MARINE...None.
&&
$$
NEAR/SHORT TERM...Baron/Hargrove
LONG TERM...Clair

NWS GYX Office Area Forecast Discussion