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000
FXUS61 KGYX 261333
AFDGYX

Area Forecast Discussion
National Weather Service Gray ME
933 AM EDT Fri Apr 26 2024

.SYNOPSIS...
High pressure will continue to build over the region today. As
winds turn to the southwest on Saturday a warming trend can be
expected over the weekend into early next week. A weak front
will bring a few showers Saturday night into Sunday. Monday will
be warm away from the coast, with cooler temperatures along the
coast where an onshore flow of cooler air will develop. Expect
a better chance of showers on Tuesday along with cooler
temperatures.

&&

.NEAR TERM /UNTIL 7 PM THIS EVENING/...
930am Update...Just some updates to hourly temps today. HRRR has
backed off on how strong seabreeze may be this afternoon, but
NAMnest is still robust. Due to weaker inland winds today,
siding with the NAM on this one anticipating this starting to
come ashore early this afternoon.

Update...
Have updated the near term portion of the forecast this morning.
Widespread 20s will be the start for early this morning. A dry
atmosphere and full sunshine will allow temperatures to quickly
climb this morning. A sea breeze will keep temperatures a little
cooler along the coast during the afternoon.

Prev Disc...
After a frosty start, temperatures will rebound
through the 50s today, reaching the lower 60s over southern New
Hampshire. There will be a sea breeze in the afternoon along and
near the coast as the gradient will be very weak. The day will
be mainly cloud free as a large area of high pressure builds
over the Northeast from Canada. Have continued to trend towards
lower surface dew points with readings in the 15 to 20 range
with good mixing through the day.

&&

.SHORT TERM /7 PM THIS EVENING THROUGH 6 PM SATURDAY/...
Forecasting another rather large diurnal range tonight. Clear
skies, light winds and continued low surface dew points will
allow for radiational cooling once again. Temperatures will dip
into the 20s in most areas with some lower 30s along the
immediate coastline and portions of southern New Hampshire.

The large area of high pressure will begin to ease off the
Northeastern Seaboard on Saturday. This will allow for warmer
temperatures climbing well into the 60s over interior areas as
winds begin to shift out of the south. Along the coast, it will
continue to be cooler, in the 50s due to onshore winds.

Warm temperatures over the interior along with nearly full
sunshine may necessitate the need for an Inland Cold Water SPS.

&&

.LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
Overview: While there are currently no major weather systems on the
horizon, a few weak disturbances will bring the potential for
scattered showers at times. Temperatures will generally remain near
average most days, although Monday stands the best chance for being
above average.

Impacts: Little to no major weather related impacts expected.

Forecast Details: An h5 ridge axis and surface high pressure
will remain over the region through Saturday with increasing WAA
aloft ahead of a weak warm front that will cross on Saturday
night into Sunday morning. This front will bring the potential
for scattered rain showers, especially across west-central NH
and extending into northwestern ME. The added cloud cover and
moisture will allow for a relatively mild night with many spots
only falling to within a few degrees either side of 40.
Increasing WAA aloft combined with onshore flow will keep
relative humidity values higher than previous days on Sunday and
there will be quite a bit of at least high-level clouds as we
remain near the top of the h5 ridge axis. A few weak pieces of
energy will traverse over the region through the day, which may
result in scattered rain showers... mainly over the north.
Highs will be primarily into the 60s, although a few spots in
southern NH could reach the 70 degree mark. Once again the ME
coast will remain cooler due to the onshore flow.

Scattered showers will end Sunday night with some clearing skies
south of the mountains. Lows will range from the 40s to lower 50s.
The ridge axis will remain over New England on Monday as we sit in
the warm sector, resulting in partly sunny skies and warm highs into
the upper 60s to perhaps middle 70s south of the mountains. The
warmest readings will be across interior southern NH and extending
perhaps into the western ME foothills. The coast will likely top out
into the 50s to near 60 before onshore flow develops later in the
day. Other than a stray shower, Monday night looks to remain
mainly dry with lows into the 40s and 50s. The ridge axis will
then begin to break down and move east of the region on Tuesday
as low pressure near Hudson Bay sends a series of fronts
eastward towards New England.

Latest guidance is trending cooler for Tuesday as winds become
more easterly behind a potential backdoor cold front. Thus, now
expecting most locations to top out into the 50s, although a few
locations in southwestern NH could still reach the low 60s.
Scattered showers are also likely, especially during the
afternoon and night as a cold front and potential weak sfc low
moves through. Shortwave h5 ridge axis and sfc high pressure
then builds for Wednesday with mild temperatures and mostly dry
conditions before shower chances increase towards late week as
the next frontal system approaches from the west.

&&

.AVIATION /14Z FRIDAY THROUGH TUESDAY/...
Short Term...VFR conditions expected today through Saturday.
Afternoon sea breezes expected along and near the coastline
during the afternoon hours.

Long Term...VFR conditions prevail through the period outside of
any widely scattered -SHRA. The greatest potential for MVFR
restrictions will be Saturday night into early Sunday and then
again on Tuesday. Winds will be primarily out of the south but
should remain largely below 20 kts.

&&

.MARINE...
Short Term...Variable winds expected in the near and short term
portion of the forecast. Winds will be locally onshore during
the afternoon hours today and Saturday.

Long Term...Winds and seas remain below thresholds hazardous to
small crafts through the period.

&&

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

&&

$$

SYNOPSIS...
NEAR TERM...Cannon/Cornwell
SHORT TERM...Cannon
LONG TERM...Tubbs
AVIATION...
MARINE...