Area Forecast Discussion
Issued by NWS Portland, ME

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FXUS61 KGYX 270744
AFDGYX

Area Forecast Discussion
National Weather Service Gray ME
344 AM EDT Sun May 27 2018

.SYNOPSIS...
Cool high pressure will build in from the northeast today and
will hold over the region into Monday with plenty of clouds
expected. High pressure will shift east late Monday and Monday
night as a weak warm front approaches from the west. A cold
front will drop south through the region by Tuesday morning.
High pressure will build over the region Tuesday and will push
offshore south of New England Wednesday. Low pressure may bring
appreciable rainfall to the region Friday into the weekend.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
Looks like sfc cold front has made thru all but Cheshire county
as of 07Z, but should move thru there very shortly. The rain
showers across srn NH, should start to diminish as they
continue to slowly shift S and E thru the early morning. While
the threat for showers across the srn tier of NH counties will
be around thru today, it will be minimal thru most of the day,
increasing only late in the day. Most of the CWA should stay
cloudy thru the day as the onshore flow takes hold, but should
stay dry, as airmass above the marine inversion remains very
dry. The exception will be the NE zones, which will see partly
sunny conds, especially into early to mid afternoon. Temps in
the NE will be the warmest with highs in the low to mid 60s,
although thanks to downsloping on the easterly flow, spots int
the CT vly could be this warm as well, with some breaks of sun
possible here, too. Otherwise highs will be in the mid to upper
50s, which is pretty much where temps are now.

May see some showers move into SW coastal ME late today as a
weak sfc low passes to our south.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM MONDAY/...
As the sfc low to our south shifts east, the flow will diminish
and the well-mixed inversion will drop and become more stable.
So, could see some DZ overnight on the coastal plain and into
the foothills. Will likely see some patchy fog as well, as Tds
start to rise, and temps fall off into the 40s.

Monday will see some slight improvement, especially in the
afternoon, once the fog and drizzle diminish during the
morning. The weak gradient flow becomes more SW, which could
allow some warmer air in away from the coast, as well as some
breaks of sun. On the coast, any SW flow will be too weak to
shift the flow offshore, and clouds and cool temps will linger
thru the day. Highs will be warmer, ranging from around 60 on
the coast to 70-75 inland.

&&

.LONG TERM /MONDAY NIGHT THROUGH SATURDAY/...
A cold front will cross the region Monday night with the chance
of showers mainly across northern and central zones. Canadian
high pres then builds southeast into the region Tuesday through
Thursday with warming temperatures expected. Thereafter, models
indicating the remnants of Alberto move into the Ohio valley
and then possibly into the northeast toward the weekend. Some
much needed rainfall is possible Friday and into the weekend.

&&

.AVIATION /07Z SUNDAY THROUGH THURSDAY/...
Short Term...DEspite onshore flow will see VFR cigs for the most
part today. This will change as all but KHIE, and maybe KLEB,
degrade to IFR or lower tonight in low cigs, fog, and some DZ
near the coast. IFR likely to linger into part of Monday
morning, with improvement to VFR inland terminals during the
afternoon.

Long Term...Scattered MVFR conditions in the mountains and
foothills Mon night with a FROPA otherwise VFR through Thu.

&&

.MARINE...
Short Term...Have extended the SCA thru today. At some during
the afternoon the winds will fall below SCA criteria, but seas
will remain up thru tonight, so SCA will transitions to haz seas
for the overnight.

Long Term...No flags.

&&

.FIRE WEATHER...
Moist onshore flow will continue into Monday. The rest of the
week looks warm, with light winds, and moderate humidity.

&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...None.
NH...None.
MARINE...Small Craft Advisory until 6 PM EDT this evening for ANZ150-
     152-154.

&&

$$



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