067
FXUS61 KGYX 031735
AFDGYX

Area Forecast Discussion
National Weather Service Gray ME
135 PM EDT Sun Aug 3 2025

.SYNOPSIS...
High pressure will be in control of the weather for most of the
week. A weak frontal boundary will bring isolated showers on
Monday and then cool temperatures off on Tuesday and Wednesday
before increasing once again towards the end of the week.
Overall conditions will remain mostly dry, except for a few
passing showers in the mountains.

&&

.NEAR TERM /THROUGH TONIGHT/...
The remainder of today will be warm and dry with skies remaining
hazy as west to northwest flow aloft brings elevated Canadian
wildfire smoke into the region. As a reminder, Air Quality Alerts
remain in effect through late this evening from the foothills
northward in ME and NH as environmental agencies from both states
are forecasting near surface concentrations to be unhealthy for
sensitive groups.

A weak cold front that will cross into the area on Monday is
currently well to our north and will slow push into southern Quebec
later today. Any precipitation with this front is expect to remain
north of the area as the airmass across NH and western ME is very
dry and also with the front approaching too late in the day.

Diurnal cumulus that develop this afternoon will fade toward sunset
with skies mostly clear through tonight. Light winds will again
promote good radiational cooling with lows mostly in the 50s,
except upper 40s and fog are possible in valley locations.

&&

.SHORT TERM /MONDAY THROUGH MONDAY NIGHT/...
Valley fog should clear out by 8-9AM, and the weak front enters
the area Monday and will gradually sag southward through the day. A
slight increase in moisture should yield more of a cu field and may
also be enough to set off a few showers/storms during the day, but
the dry air and lingering subsidence aloft depicted in forecast
soundings is expected to keep coverage of any showers/storms
isolated. Aloft, the flow will remain nearly zonal and is expected
to continue transporting elevated Canadian wildfire smoke into the
area, keeping the hazy skies.

It will otherwise be a very warm day with highs reaching the mid to
upper 80s south of the mountains and low 90s possible across
parts of southern NH and far southwest ME. Afternoon dewpoints are
expected to remain in the 50s, which will keep afternoon humidity
low with heat indices remaining close to the temperature and below
any headline criteria. In addition, highs may again be hindered by
the hazy conditions.

Dry conditions are expected Monday night, but southern areas may
hold onto more cloud cover in closer proximity to what`s left of the
frontal boundary. Some guidance is also hinting at fog. Farther
north and west, skies should be able to clear out, and valley fog
will be possible once again. Lows will be mostly in the 50s, but
those valleys that clear out could see overnight temps dip into the
upper 40s.

&&

.LONG TERM /TUESDAY THROUGH SUNDAY/...
Key Points:
* Little to no impactful weather forecast
* Other than the chance for diurnal showers Tues-Thurs,
  extended forecast lacks measurable rainfall.
* Temperatures run around normal or a couple degrees below to
  start the period, trending warmer for second half of the
  forecast.


Details:
Weak cold front Tuesday morning will be pushing south followed
by strong high pressure midweek. This high will dictate the
weather for late week into the weekend. Its positioning
displaces the jetstream, keeping New England void of wetting
rain opportunities via synoptic scale systems. Low flow and some
moisture however will allow the chance for diurnal showers
during the afternoon Tuesday through Thursday. More conducive
profiles with instability lie across interior New England, and
this means western NH stands the best chance of these showers
popping up with some SB/MU CAPE. While these showers may be
nearly stationary given less than 10 kts of wind through 500mb,
PWAT and mean RH through the column is not a concern.
Additionally, the dry profile will limit coverage.

The slow moving high will influence the region through next
weekend, pushing east late week. The additional return flow will
advect gradually warming temperatures in the region, with a
return to mid/upper 80s and possibly 90 Sunday/Monday. It is
also this timeframe when the next chance for widespread wetting
rainfall arrives via WAA ahead of a approaching cold front.
However, consensus probabilities are still on the lower side,
and harbor little additional value outside of a signal for rain
chances.

&&

.AVIATION /18Z SUNDAY THROUGH FRIDAY/...
Short Term...Mostly VFR, but HZ/FU may cause MVFR visibilities
at times today and Monday with wildfire smoke from Canada
lingering across the region. Valley fog is also likely at LEB
and HIE tonight and again Monday night. Coastal sites can expect
a wind shift early Monday afternoon with the seabreeze moving
onshore.

Long Term...VFR with light winds Tuesday through Thursday. Iso
SHRA during afternoons, mainly across western NH terminals.

&&

.MARINE...
Short Term...Conditions are expected to stay below SCA levels
through Monday night. South to southwest flow continues through
Monday with high pressure to the southeast of the waters and a
weak frontal boundary approaching from the north. The gradient
tightens later today and could support a period of wind gusts in
the 20-25 kt range into tonight. Winds turn to the northeast
Tuesday night as high pressure builds in north of the area
behind the weakening front.

Long Term...Outside of a weak cold front draped across the
waters Tuesday morning, the weather pattern will mainly consist
of large high pressure moving overhead through midweek. SE
return flow gradually builds Thursday afternoon as this high
departs east. Winds and seas expected to remain below SCA
criteria, but will see wave increasing to 3 to 4 ft by end of
week.

&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...Air Quality Alert until 11 PM EDT this evening for MEZ007>009-
     012>014-018>021-033.
     Beach Hazards Statement until 8 PM EDT this evening for MEZ027-
     028.
NH...Air Quality Alert until 11 PM EDT this evening for NHZ001>006.
MARINE...None.

&&

$$


NEAR TERM...Combs
SHORT TERM...Combs
LONG TERM...Cornwell