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-- Discussion containing changed information from previous version are highlighted. --
000
FXUS61 KGYX 261410
AFDGYX

Area Forecast Discussion
National Weather Service Gray ME
1010 AM EDT Tue Sep 26 2023

.SYNOPSIS...
High pressure remains largely in control over northern New
England through the end of week. This will bring fair and dry
conditions, with light winds. Cool nights are expected with some
scattered frost possible in the far north tonight. Temperatures
moderate through the week limiting the chances for frost after
tonight.

&&

.NEAR TERM /THROUGH TONIGHT/...
-- Changed Discussion --
10 AM Update...No changes to the going forecast at this time.
Sunny skies are expected most areas today with temperatures
warming into the 60s. Across southern NH, clouds will gradually
decrease in coverage.

655 AM Update...Minor tweaks to T/Tds to capture the latest
observed trends.

Previously...

High pressure continues to build from the north today and will
become centered over northern New England by tonight. Steady NE
winds will prevail along the coastal plain with some gusts up to
20 mph along the NH Seacoast and coastal SW Maine. Otherwise,
expect fair skies with highs in 60s.
-- End Changed Discussion --

&&

.SHORT TERM /WEDNESDAY/...
High pressure will be centered close to overhead tonight setting
up efficient radiational cooling. This will bring lows into the
upper 30s to low 40s across the area with favorable radiational
cooling spots approaching the mid to low 30s. The question mark
for tonight revolves around fog versus frost as dewpoints look
to remain just above freezing in the coldest spots. Have continued
with the mention of frost in far northern zones, mainly Coos County,
but have held off on a Frost Advisory as there remains the possibility
that fog formation will keep surfaces from reaching the frost point.

Moderating temperatures and fair skies are forecast for
Wednesday. Highs will be in the upper 60s with light winds.

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/...
A slow moving ridge of high pressure crosses the forecast area
Wednesday night to start out the long term portion of the forecast.
Mainly clear skies will remain in place and with light winds and a
dry atmosphere, some radiational cooling will take place with
overnight lows in the 40s. Some patchy fog will redevelop, mostly
over interior valley locations.

High pressure will remain in place across the Northeast for Thursday
before a trough of low pressure approaches from the west Thursday
night. This weak system will allow for some increase in cloud cover
which will last through Friday and Friday night.

00Z operational models and ensemble solutions suggest most if any
precipitation should be shunted off to the south Friday night and
into the upcoming weekend. However, some light shower activity may
reach far southern portions of the forecast area.

&&

.AVIATION /14Z TUESDAY THROUGH SATURDAY/...
Short Term...MVFR cigs may impinge upon southern TAF sites
at times through mid morning and fog remains possible at KLEB
and KHIE during the pre-dawn hours. VFR prevails today with
lighter NE winds. Valley fog will likely form tonight with the
greatest chances for IFR/LIFR to occur at KLEB and KHIE for a
few hours before sunrise. VFR will again prevail Wednesday.

Long Term...Aviation weather impacts will be limited for this period
with high pressure in control. The only issue will be early
morning valley fog formation that could bring a few hours of
LIFR conditions to some TAF locations, mainly HIE and LEB.

&&

.MARINE...
Short Term...NE winds and seas around 5 feet will continue SCA
conditions through this morning. Winds subside late this morning
followed by subsiding seas north to south this afternoon.
Conditions remain below SCA thresholds tonight through
Wednesday.

Long Term...The next chance of marginal SCA conditions may arrive
late this weekend as some swells make their way into the Gulf of
Maine.

&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...None.
NH...None.
MARINE...Small Craft Advisory until 11 AM EDT this morning for ANZ150.
     Small Craft Advisory until 4 PM EDT this afternoon for ANZ152-
     154.

&&

$$
SYNOPSIS...
NEAR TERM...Ekster
SHORT TERM...Schroeter
LONG TERM...Cannon
AVIATION...
MARINE...