Area Forecast Discussion
Issued by NWS Portland, ME

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FXUS61 KGYX 250729

Area Forecast Discussion
National Weather Service Gray ME
329 AM EDT Tue Oct 25 2016

Low pressure will remain over the Canadian maritimes through today
before weakening and shifting east tonight. We can expect another
day with breezy northwest winds and upslope snows in the
mountains, which will end tonight.  A narrow ridge of high
pressure will build in from the west Wednesday. High pressure
will shift east on Thursday as low pressure approaches from the
west. Low pressure will move east through southern New England
Thursday night and northeast through the Gulf of Maine on Friday.
High pressure will build in from the west Friday night and low
pressure will approach from the west on Saturday.


Upper level low and surface continue to spin near the maritimes
today, with several weak waves moving through, so expect the NW
flow to produce another breezy and cool day with upslope SHSNRA in
the mountains. Should see best snow begin to wind down this
afternoon, but should a few more inches in those upslope areas
above 200 feet, with even higher on the highest terrain. Otherwise
look for partly sunny skies on the coastal plain. Temps will warn
to 50, or maybe the lower 50s along the coast and in southern NH,
where the warmer MET has been performing best in this downsloping
over the last couple of days. It will be in the 40s most
everywhere else, although a few mountain spots may not crack 40.


One more wave works its way southward around that low to our NE
and could see another wave of clouds, but any upslope SHSN will be
lighter and less widespread. Wed morning lows will end up a
couple degrees cooler than this morning, and winds will be
diminishing, which will allow for some decoupling in the
sheltered spots. Low will range from the mid-upper 20s in the
mountains, to the low 30 in the south.

Will see the low begin to move out of the maritimes, but will
still be beneath cyclonic flow aloft, and thus, will be be partly
to mostly cloudy. winds will be the lightest we have seen in the
last few days, but still from the NW at 10-15 mph. Despite CAA
waning, the coldest air of this surge will be overhead, so highs will
drop a couple degrees from Tuesday, ranging from around 40 in the
the N to the upper 40s in the S.


A narrow ridge of high pressure will build in from the west
Wednesday night as low pressure finally shifts off to the east.
Lingering clouds will gradually diminish overnight allowing for
good radiational cooling...especially after midnight. Lows will
range from the lower 20s north to the mid to upper 20s south.

Models coming into line on low pressure approaching from the west
on Thursday. After a mostly sunny start to the day...clouds will
be on the increase in the afternoon with rain pushing into
western zones by late afternoon and early evening. Over-running
pattern ahead of low pressure will gradually work north and east
Thursday evening. Cold air damming east of the mountains will
likely result in some wet snow or sleet during the evening hours
in the mountains and foothills and over the higher terrain
in interior sections of Maine and New Hampshire. Intensifying
onshore flow will bring warmer air northward overnight as low
pressure swings into southern New England so not looking for much
in the way of accumulation. Rain will be heavy at times after
midnight. Expect steady or slowly rising temps overnight.

Low pressure will slowly move northeast through the Gulf of Maine
on Friday. Expect steady rain in the morning to gradually push
north and east of the area through early afternoon leaving clouds
and areas of drizzle in its wake. Highs on Friday will range from
the upper 30s to mid 40s north and upper 40s to mid 50s south.

Low pressure will pull away to the east Friday night as a narrow
ridge of high pressure builds in from the west. Looking for clouds
to gradually diminish downwind of the mountains overnight with
variable cloudiness in the north. Lows will range through the 30s.

Models still showing some significant diffs for the weekend as
another shortwave forecast to drop into the northeast. GFS the
most aggressive with this fast moving clipper type system while
the ECMWF showing a much weaker wave and associated surface low.
Will likely stay close to superblend pop numbers for Saturday.


Short Term...Mainly VFR, with the exception of KHIE, which will
see some restrictions to MVFR in times in SHN into this
afternoon. NW winds will gust in the 20-25 kt range today, but
winds should diminish on Wed.

Long Term...VFR Wednesday night. IFR/LIFR ceilings developing
Thursday afternoon and persisting through Friday. Becoming VFR
Friday night. Areas of MVFR/IFR ceilings developing Saturday


Short Term...Will keep the SCA going through today as we are
expecting another surge of winds. HAve held off extending it for
now, as there is some uncertainty if the winds will continue
overnight, but should be able get by without SCAs on Wed at

Long Term...Sca`s likely Thursday night and Friday.


MARINE...Small Craft Advisory until 8 PM EDT this evening for ANZ150-


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