Hampton, New Hampshire 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

959
FXUS61 KGYX 150605
AFDGYX

Area Forecast Discussion
National Weather Service Gray ME
205 AM EDT Fri Aug 15 2025

.SYNOPSIS...
A cooler and drier airmass will be in place today as high
pressure builds in from Canada. High pressure slides across
northern New England Saturday for fair weather and rising
temperatures into Sunday. A cold front will cross Sunday
afternoon bringing the chance for scattered showers and
thunderstorms. High pressure builds in behind the front for
mostly fair weather through the first half of next week.

&&

.NEAR TERM /TODAY THROUGH TONIGHT/...
Cold front has crossed the area and a drier air mass will move
in today. With deep mixing expected I blended some of the mixed
down dewpoints with the NBM guidance so that minimum RH values
fall to near 30 percent. Combined with some breezy northerly
winds we will have to keep an eye on fire weather conditions.
Then tonight high pressure in control and recent dry weather
will support good radiational cooling. NBM looked pretty
good...but I did adjust the major radiational cooling sites down
a few degrees.

&&

.SHORT TERM /SATURDAY/...
High pressure will be centered overhead Saturday morning and
will drift east through the day. This will bring mostly sunny
skies with increasing onshore flow Saturday afternoon. Highs
will climb into the mid to upper 80s across much of the area
while onshore winds will keep coastal regions closer to 80
degrees.

&&

.LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
01Z NBM Update...No significant changes noted in the latest
National Blend of Models. Very warm and humid conditions are
likely early in the period Sunday before a cold front crosses
Sunday evening. The latest 00Z NAM and 18Z RRFS suggest
sufficient instability will build ahead of the front for
convection. South of the mountains, the juxtaposition of shear
and CAPE may become favorable for organized updrafts and a few
strong storms. The potential for strong storms is also noted
within the latest available ML guidance.

Previously...

Return flow around the offshore high will advect warmer air and
moisture into the region Saturday night into Sunday. A cold
front will cross Sunday afternoon through Sunday night bringing
chances for scattered showers and thunderstorms. Models are in
decent agreement that the frontal passage will occur near peak
heating with sufficient instability and shear for a few strong
storms. Prior to the frontal passage, highs will climb into the
upper 80s to low 90s south of the mountains.

Canadian high pressure will build in behind the front bringing
a cooler and drier airmass into the region. High pressure will
be slow to move offshore allowing this pleasant air mass to stay
in place. Highs Monday through Wednesday will mainly be in the
70s with overnight lows in the 40s to 50s. There is a little to
no signal for widespread precipitation going into the second
half of next week, which will likely lead to an increase in our
precipitation deficits during the period.

&&

.AVIATION /02Z FRIDAY THROUGH TUESDAY/...
Short Term...Some patchy valley fog this morning is possible
this morning at LEB...and also HIE but that is lower confidence.
Otherwise breezy northerly winds will give way to a seabreeze
near the coast...and winds likely turn onshore at PSM/PWM/RKD by
early afternoon. VFR conditions expected to prevail.

Long Term...Moist southerly flow Saturday night will bring the
potential for some marine stratus/fog to impact KRKD and KAUG
and there will be potential for valley fog at KLEB and KHIE.
Mainly VFR is likely Sunday morning into the afternoon before a
cold front brings scattered TSRA that may bring localized
restrictions from the afternoon into the evening. High pressure
builds in Monday and Tuesday for mainly VFR except for
nighttime valley fog.

&&

.MARINE...
Short Term...Lingering marine fog will be swept out to sea as
the cold front continues to slip thru the area. Breezy offshore
winds today but otherwise winds and seas expected to remain
below SCA thresholds.

Long Term...High pressure moves over the waters Saturday through
Sunday with a cold front crossing Sunday evening. Winds and seas
will generally stay below SCA thresholds, although as the front
approaches Sunday southerly winds could gust in excess of 20
kts. The front will bring chances for showers and thunderstorms
into the waters Sunday evening. Offshore winds behind the front
will potentially gust around 25 kts Sunday night before relaxing
Monday as high pressure builds in. High pressure will remain
over the waters into the middle of next week. Long period swell
from TS Erin may reach the waters towards the end of next week.


&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...None.
NH...None.
MARINE...None.

&&

$$


NEAR TERM...Legro
SHORT TERM...Legro
LONG TERM...Palmer/Schroeter