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000
FXUS61 KGYX 230247
AFDGYX

Area Forecast Discussion
National Weather Service Gray ME
1047 PM EDT Sun Apr 22 2018

.SYNOPSIS...
High pressure centered over the eastern Great Lakes will build
farther into the area tonight. The high pressure center crests
over the area Monday before shifting offshore by Tuesday. Fair
weather and seasonable temperatures are forecast during this
time. By mid week, unsettled weather returns with the approach
of our next storm system. Beyond that, another fast moving
system may be in the cards for the end of the week.

&&

.NEAR TERM /THROUGH MONDAY/...
11pm update... Have dropped low temperatures in a few of the
favored valley locations such as Sanford, Fryeburg, Whitefield,
and Berlin as the clear skies take hold and have allowed
temperatures to drop rapidly. Dewpoints currently in the 20s
should keep a lower bound on the lows. 7pm update...Still clear
skies across the area. No changes needed. prev disc... Beautiful
day in progress with a few clouds on this Spring day. Sunny
skies and low dew points have allowed temperatures to climb into
the mid to upper 50s for much of the region. The highest
temperature at 2 PM was 59 at both Concord and Nashua.

Building high pressure from the west will allow winds to drop to
calm. Low PW values (0.22" this morning and dropping) will
support near ideal cooling conditions for this time of year.
Expecting temperatures to fall into the lower 20s to low 30s
across the region with coldest readings north.

&&

.SHORT TERM /MONDAY NIGHT/...
After a chilly start on Monday...temperatures will rapidly
increase in a very dry airmass and full Spring sunshine. Monday
looks pleasant with light winds, very few clouds, and
temperatures topping out in the mid 50s north to lower 60s under
the strong late April sunshine. A few readings closer to 65 will
be possible for the Concord, Nashua, Manchester corridor. The
light synoptic flow will transition to a seabreeze with the
mercury dropping off during the afternoon near the coast.

High pressure pushes offshore overnight Monday allowing some
light southerly flow to return to NH and northern Maine. We`ll
see cirrus clouds begin to arrive overnight. These factors will
keep overnight lows a few degrees warmer than the previous
night.

&&

.LONG TERM /TUESDAY THROUGH SUNDAY/...
A strong ridge of high pres over the area Tue moves offshore Tue
night allowing a return south to southeast flow to develop. A
strong upper short wave moves to the mid atlantic coast by Wed
morning spawning a surface low near DELMARVA that will move
northeast late Wed and Wed night. This will spread a soaking rain
across the region Wed into Wed night with between .75-1.25 inches
of rain with some locally higher amounts. The surface/upper trof
lift northeast Thu toward the maritimes allowing instability
showers to stick around due to the cold pool aloft combining with
some surface heating allowing steepening lapse rates enhancing
some showers. Thu night into early Fri a short wave ridge briefly
brings clearing to the area. By Fri afternoon a strong long wave
trof approaches the east coast brining another surge of southerly
moist unstable air spreading more rain into the area by late Fri
afternoon and Fri night. The system exits Saturday but leaves a
colder cyclonic northwest flow in its wake...this will mean
scattered mainly afternoon showers can be expected to develop once
again. Temps will be briefly very mild Tue but cooler with the
unsettled weather the rest of the week.

&&

.AVIATION /03Z MONDAY THROUGH FRIDAY/...
Short Term /through Monday/...VFR.

Long Term...VFR through Tue. IFR/LIFR conditions Wed into Wed
night improving to MVFR conditions in sct -shra Thu. VFR
conditions Thu night into early Fri. Late Fri conditions lower
to IFR in developing rain from S-N.

&&

.MARINE...
Short Term /through Monday/...Quiet on the waters with winds and
seas below SCA under a building surface high. On Monday mid day
and afternoon...a developing seabreeze along the coast will
bring gusts to 20 kt with briefly building seas.

Long Term...No flags through early Wed. SCA conditions develop
late Wed and continue through Thu over the outer waters.

&&

.FIRE WEATHER...
Winds will be light and backing from the west to the southwest
during the day on Monday. Low dew points will yield RH values in
the 20 to 25% range during the afternoon hours over most of
southern and central NH as well as interior Maine. A seabreeze
may produce wind gusts higher than 10 mph along the coast,
briefly increasing fire weather conditions in the afternoon.

&&

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

&&

$$
SYNOPSIS...
NEAR TERM...Curtis
SHORT TERM...Hanes
LONG TERM...Marine
AVIATION...
MARINE...
FIRE WEATHER...