Monday, August 20, 2018, 8:44 AM EDT
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Area Forecast Discussion
||Wed, Dec 31, 7:00pm EST
FXUS61 KGYX 201027
Area Forecast Discussion
National Weather Service Gray ME
627 AM EDT Mon Aug 20 2018
High pressure slowly moves to the northeast today and into the
Canadian Maritimes on Tuesday. An upper level trough will move
east into the region around midweek, bringing a chance of
showers and thunderstorms Tuesday night and Wednesday before a
cold front moves through. This cold front will usher cooler and
drier air into the region through the weekend.
.NEAR TERM /TODAY/...
Made only minor adjustments to hourly temperature and dewpoint
trends based on latest observations.
Weak mid level low has kept mostly cloudy skies across the area
overnight, and this will slowly move to the northeast today.
This should eventually bring a bit more sunshine by days end.
The temperature should warm into the 70s for most of the area,
with northern areas making a run at 80 degrees.
.SHORT TERM /TONIGHT AND TUESDAY/...
Surface ridge of high pressure remains over the coastal plain
tonight bringing calm conditions. This should allow for decent
radiational cooling conditions and some fog developing
especially in valley locations. Temperatures mainly drop into
the 50s, but some 40s are possible in the more sheltered spots.
A more southerly flow begins on Tuesday as high pressure pulls
off to the northeast. This will again keep temperatures cool and
may bring in a bit more cloud cover and higher dewpoints.
.LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/...
An upper trof will approach from the Great Lakes Tue night
spreading clouds and showers into the region. Models in good
agreement on timing. Widespread showers and scattered
thunderstorms expected Wed as the trof moves across the area.
Enough dynamics in place Wed to introduce the possibility of
some strong storms as well. RFC guidance brings QPF amounts of
.25-.50 inches with this system. The models are in good
agreement allowing the trof to remain progressive and exit by
Wed night allowing a trailing cold front to move across the
region followed by clearing late Wed night and Thu. Temps will
be cooler and drier Thu and near seasonal temps expected Fri
and into the weekend.
.AVIATION /12Z MONDAY THROUGH FRIDAY/...
Short Term...Valley fog likely tonight at Whitefield and
Lebanon. It is also possible at Concord and in the coastal plain
as well. This should dissipate not long after the sun comes up.
Long Term...Conditions lowering to IFR Tue night and through Wed
in showers and scattered tstorms. Conditions improve to VFR
behind a cold frontal passage Wed night and Thu.
Short Term...High pressure slowly moves across the Gulf of Maine
through Tuesday, keeping wind speeds low and wave heights well
below advisory levels.
Long Term...Winds and seas will remain below SCA conditions.