Area Forecast Discussion
Issued by NWS Portland, ME

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FXUS61 KGYX 121509 AAA
AFDGYX

Area Forecast Discussion...UPDATED
National Weather Service Gray ME
1109 AM EDT Wed Aug 12 2020

.SYNOPSIS...
A cold front will gradually slide offshore today. Slightly
cooler and drier air follows the 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.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
Update...No major changes to the forecast for this afternoon.
Some hi-res model guidance does hint at convection trying to
form near the coast this afternoon...so I have introduced some
isolated showers for that area. Overall expecting a dry day for
most people.

ORIGINAL DISCUSSION...
A cold front is currently moving across the forecast area
roughly from west to east. A broken line of showers continues
with this, though the activity has decreased in coverage
significantly in the last few hours. Unfortunately for those
looking for some rain, the front will likely clear the coast
this morning... too soon for a new round of showers and storms
to form. As a result, expect a dry day today with temperatures
near where they were yesterday if not a few degrees cooler.
Humidity levels will be falling behind the front as well, so
although temperatures will approach 90 today the heat index will
only be a degree or two higher and thus not quite to Heat
Advisory levels.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM THURSDAY/...
High pressure to our north makes its influence felt across New
England in the wake of the cold front. Expect quiet conditions
with light winds and relatively dry air as well. This should
allow temperatures to fall off into the 60s and 50s overnight.
Another warm day expected Thursday with highs in the mid to
upper 80s, but humidity levels will remain low.

&&

.LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/...
The ensemble and deterministic model solutions are in good agreement
on the long wave pattern through the upcoming weekend and the
first half of next week. We begin the period with an upper trough
across New England for Friday and Saturday along with the
possibility of widely scattered convection. The trough shifts
offshore by Sunday with rising heights...ridging...and dry weather
to close out the weekend. The flattening ridge is quickly
replaced by an upper trough stretching from the Great Lakes
through the northeast for the start of the new work week. A
series of passing impulses and a slow-moving frontal system will bring
increasingly more humid and unsettled weather to the region.

&&

.AVIATION /15Z WEDNESDAY THROUGH SUNDAY/...
Short Term...VFR conditions expected with light west to
northwest winds today. Could be some fog developing at LEB and
HIE by early Thursday morning, but otherwise VFR conditions
continue.

Long Term...

Fri - Sat...Isolated MVFR possible in -SHRA/-TSRA.

&&

.MARINE...
Short Term...Southwest winds ahead of the front today will gust
into the 20 KT range, but expect winds to decrease after the
front moves through today.

Long Term...

Sat PM - Sun...NE flow may produce SCA`s outside the bays.

&&

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

&&

$$

NEAR TERM...Legro



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