Danbury, New Hampshire Weather Forecast Discussion

069
FXUS61 KGYX 280510
AFDGYX
Area Forecast Discussion
National Weather Service Gray ME
110 AM EDT Sun Sep 28 2025
.SYNOPSIS...
High pressure remains over New England through early in the week
with dry weather and warm temperatures. A cold front moves
through Tuesday, allowing for much cooler and continued dry
weather for midweek with potential frost. Warmer conditions
return late in the week and next weekend as high pressure
remains in place.
&&
.NEAR TERM /THROUGH TODAY/...
As a warm front lifts north of the area this morning, warmer
air moves in on a southwesterly flow for today. Sunshine
increases as clouds clear through the morning, allowing temps to
warm into the low to mid 80s in most locations. Some relatively
cooler temps are expected across the north where highs in the
mid to upper 70s are likely, and along the MidCoast where an
onshore flow keeps temps in the 70s today.
A weak cold front slides through late this afternoon and
evening, but will bring little more than a few clouds and a wind
shift with it`s crossing.
&&
.SHORT TERM /TONIGHT THROUGH MONDAY/...
Drier air moves in tonight behind the front, with dew points
falling back into the 40s overnight. High pressure quickly
follows behind the front, bringing favorable radiational cooling
conditions late tonight across the northern valleys. Temps here
likely cool into the low 40s, while low 50s are likely along
the coast.
High pressure remains in place tomorrow, with mainly sunny
skies and warm conditions expected again. Highs warm into the
upper 70s to low 80s in most spots. A sea breeze likely develops
in the afternoon, knocking temps back to the mid 70s along the
immediate shoreline and the MidCoast. Mid 70s are also likely
across northern areas as well.
&&
.LONG TERM /MONDAY NIGHT THROUGH SATURDAY/...
Early morning long term update...Very little change to the going
forecast as latest NBM, various other ensembles and
deterministics continue the dry weather stretch. A cold front
moves southward Monday night and Tuesday as large high pressure
pushes in from the north. Another warm day Tuesday will be
followed by a much cooler air mass Tuesday night and Wednesday.
There will be potential for frost in several areas especially
Wed and Thu nights. It is hard to say when our next chance for
meaningful rainfall will come as a good portion of the guidance
suite is dry (or mostly dry) through the first week of October.
Previously...
The dry pattern we`ve fallen back into will continue Monday through
the end of the long-term forecast period (next Saturday), possibly
longer with nearly unanimous support from the GFS/ECMWF individual
ensemble members.
New England will sit between an upper low over the Canadian
Maritimes and a 500mb ridge over the center CONUS for the first half
of the week. Monday will be warm and dry with highs in the 70s to
lower 80s, and then a couple of dry backdoor cold fronts will
gradually cool temperatures toward midweek. Behind these fronts,
strong Canadian high pressure builds in from the north and settles
on top of New England through late week. Not only will this continue
the dry weather, the high will bring some cooler temps with highs in
the 60s for Weds-Thurs and favorable conditions for radiational
cooling and cold nights with possible frost Tues night through
Thursday night. The frost potential looks mainly over the north
Tuesday night and then more widespread the next couple of
nights. The high begins to sink south Fri-Sat with temperatures
starting to moderate with light southerly return flow. Valley
fog is also possible most nights, especially along the CT River.
&&
.AVIATION /02Z SUNDAY THROUGH THURSDAY/...
Short Term...VFR prevails during the daytime at all terminals
today and Monday. LIFR conditions in valley fog are likely at
LEB and HIE through daybreak this morning, and possible again
late tonight. A period of IFR to LIFR conditions is likely at
AUG and RKD through early this morning.
Long Term...Mostly VFR will continue from Monday night onward
with restrictions mainly limited to nighttime and morning valley
fog at HIE and LEB.
&&
.MARINE...
Short Term...Conditions remain below SCA levels through Monday
as high pressure remains in place across the waters. A weak cold
front crosses through this evening.
Long Term...High pressure keeps winds/seas under SCA levels
through Monday night. A couple of backdoor type front cross
Tues-Weds, and then SCA conditions are possible Tuesday through
Thursday as north to northeast winds increase with strong high
pressure building in from the north. In addition to these winds,
the waters will likely start seeing long-period swells from
distant tropical cyclone Humberto on Tuesday, which may build
seas to SCA levels prior to the increasing winds. Winds and
seas will diminish Thursday night into Friday as the high
builds more overhead.
&&
.CLIMATE...
Daily record high temperatures that could be tied or broken
today, Sunday the 28th.
Portland...82 in 1948
Augusta...83 in 2014
&&
.GYX WATCHES/WARNINGS/ADVISORIES...
ME...None.
NH...None.
MARINE...None.
&&
$$
NEAR TERM...Clair
SHORT TERM...Clair
LONG TERM...Combs/Ekster

NWS GYX Office Area Forecast Discussion