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000
FXUS61 KGYX 230727
AFDGYX

Area Forecast Discussion
National Weather Service Gray ME
327 AM EDT Fri Jun 23 2017

.SYNOPSIS...
Tropical moisture from the remnants of Tropical Storm Cindy...and
an approaching frontal system will result in showers and
thunderstorms today and tonight. A series of surface troughs or
weak cold fronts will cross the area this weekend into early
next week bringing us the chance of showers from time to
time...especially in central and northern areas.

&&

.NEAR TERM /TODAY/...
Clouds are increasing ahead of an approaching low pressure
system with southerly flow increasing at the surface. Currently
winds are calm but these will increase during the heat of the
day with dew points reaching the 60s and temperatures reaching
the 70s and 80s. Portions of southern NH and southwest Maine
will see upper 80s ahead of a surface front which will arrive
late in the day. Precipitation will increase over the higher
terrain initially as forcing for ascent arrives and this will
spread south and east with time. Thunderstorms are expected with
locally heavy rainfall which will tap into moisture from Cindy.
Storms will generally be garden variety with substantial
forcing arriving so late. Any areas that do get ample insolation
may see stronger storms.

&&

.SHORT TERM /TONIGHT AND SATURDAY/...
Showers continue through the evening and overnight hours with
the threat for torrential downpours diminishing after midnight.
Drier air does not entrain into the region until Saturday so
overnight lows will be on the warm side and in the 60s and even
lower 70s. Highs warm into the 70s and 80s Saturday.

&&

.LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
Cold front will push offshore by Saturday night, but the broader
upper trough will remain over the area for the next several
days. This will bring a relatively persistent weather pattern
featuring temperatures near normal (highs in the 70s, lows in
the 50s to near 60), a light offshore westerly wind, and
diurnally-induced showers and occasional thunderstorms each
afternoon, diminishing in the evenings. There may be a few
stronger waves which rotate through the trough providing a
better focus for precipitation, but for the most part
precipitation chances are based on afternoon heating beneath the
cool trough aloft generating instability and daily scattered
showers. Given the light flow pattern, expect a sea breeze most
days which will keep the coast a little cooler and limit the
precipitation chances there.

The axis of the upper trough moves through the region Tuesday
into Tuesday night, with a subsident northwest flow behind the
trough on Wednesday. This may enhance the shower activity on
Tuesday and then cut it off for Wednesday. Surface high pressure
over the Southeastern USA shifts east toward the East Coast
later in the week, allowing some warmer air to begin spilling
into New England late in the week.

&&

.AVIATION /07Z FRIDAY THROUGH TUESDAY/...
Short Term...VFR conditions should dominate all locations
through the morning...but by afternoon...expect increasing
shower and thunderstorm coverage to result in some occasional
MVFR/IFR restrictions...esp at HIE/LEB/AUG. Also...marine layer
will likely work into RKD with IFR CIGS/MVFR VSBYS.
Shower/thunderstorm coverage will decrease Friday night...but
with moist airmass still in place...expect a good amount of haze
and fog...with locally dense fog possible depending on how much
rain we realize. Southerly winds will gust to 20 kts today.

Long Term...A dry west to northwest flow out of Canada will keep
conditions VFR this weekend and much of next week. There will be
a chance of afternoon showers and possibly a few thunderstorms
each day, with the best chance being in the interior.

&&

.MARINE...
Short Term...SCA continues for increasing SW winds Friday
afternoon into early Saturday morning. Winds will likely peak
Saturday evening.

Long Term...Cold front moves into the Gulf of Maine Saturday
night with a light offshore flow behind it. Winds will be fairly
light through the coming week in the absence of any strong
pressure systems, with the daily flow being dominated by the sea
breeze.

&&

.TIDES/COASTAL FLOODING...
Astronomical high tides will continue through the weekend with
the possibility of nuisance flooding Saturday night at high tide
which will occur at 12:05 am Sunday Morning at Portland and
12:16 am at Portsmouth/Fort Point.

&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...None.
NH...None.
MARINE...Small Craft Advisory from 2 PM this afternoon to 8 AM EDT
     Saturday for ANZ150-152-154.

&&

$$

NEAR TERM...Hanes
SHORT TERM...Hanes
LONG TERM...Kimble