Area Forecast Discussion
Issued by NWS Portland, ME

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FXUS61 KGYX 121911
AFDGYX

Area Forecast Discussion
National Weather Service Gray ME
311 PM EDT Wed Aug 12 2020

.SYNOPSIS...
Slightly cooler and drier air follows in the wake of a cold
front for the remainder of the work week. High pressure in the
Canadian Maritimes will allow for relatively dry and seasonable
temperatures over the weekend. A slow moving frontal system
could bring widespread precipitation early next week.

&&

.NEAR TERM /THROUGH TONIGHT/...
Strongest convergence locally is occurring along the sea breeze
front...which is tight to the coast in NWly flow. Still carrying
some isolated showers in the forecast along this convergence
zone...but otherwise dry this evening and overnight.

Drier air is starting to mix down...with lots of low 60s and
some upper 50s dewpoints starting to show up. Coolest temps are
expected across the Nrn valleys tonight...with the coastal zones
the last to see temps get more comfortable overnight.

&&

.SHORT TERM /THURSDAY THROUGH THURSDAY NIGHT/...
Really quiet wx Thu and Thu night. One more day of very warm
temps...with readings approaching 90 degrees in the usual hot
spots. Weak pressure gradient will lead to stronger sea
breezes...and some relief for coastal locations. Overnight will
feature good conditions for radiational cooling...and some
valley fog may result on night two of the drier air being in
place.

&&

.LONG TERM /FRIDAY THROUGH TUESDAY NIGHT/...
Overview: The long term continues to look rather quiet, at least as
far as impactful weather is concerned. Above normal temperatures on
Friday will give way to near normal temperatures for the weekend and
early next week. The only significant precipitation in the forecast
is for Monday and Tuesday as a slow moving frontal system is
expected to push through New England.

Impacts: No impactful weather expected.

Forecast Details: Friday begins with an upper level trough
stretching south into New England and with our region on the
southern edge of high pressure centered over Quebec. These two
features will keep things mostly quiet here through Saturday
with the exception of some isolated showers in southern NH on
Friday and in the northern mountains of NH and western ME on
Saturday.

An upper level ridge moves in late Saturday into Sunday but is
quickly pushed east as an upper level trough pushes south from
Canada. Could see some isolated showers Sunday afternoon over
western areas of the region, but the most significant
precipitation chances look to come early next week as a slow
moving frontal system associated with the upper trough pushes
east through New England and scattered showers and thunderstorms
will be possible Monday and Tuesday as it does so.

As far as temperatures, Friday looks like the only day with
above normal temperatures as the combination of the nearby high
pressure and then the upper trough work to keep temperatures
near normal through the rest of the period.

&&

.AVIATION /19Z WEDNESDAY THROUGH MONDAY/...
Short Term...Widespread VFR conditions expected thru Thu night.
Some valley fog possible in the CT River Valley Thu night. Local
LIFR conditions possible at LEB and HIE.

Long Term...Generally VFR conditions expected in the long term. Brief
restrictions to MVFR/IFR possible in SHRA/TSRA at LEB/CON/MHT on
Friday, but the best chances for widespread restrictions will be at
all terminals on Monday and Tuesday as a slow moving frontal system
affects the region. Winds will generally remain below 10 kt.

&&

.MARINE...
Short Term...Winds and seas are expected to be below SCA
thresholds with high pressure building over the waters. Onshore
winds are expected in sea breezes during the afternoon.

Long Term...Winds may become gusty to 20 kt at times from the northeast
over the outer waters Saturday and Sunday. May also briefly see seas
rise to 5 ft over the outer waters Saturday morning before diminishing
and building above 5 ft over the outer waters and parts of Casco Bay
Sunday through Tuesday.

&&

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

&&

$$

NEAR TERM...Legro
SHORT TERM...Legro
LONG TERM...Watson
AVIATION...Legro/Watson
MARINE...Legro/Watson


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