Area Forecast Discussion
Issued by NWS Portland, ME-- Highlight Changed Discussion --
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FXUS61 KGYX 161501 AAA
Area Forecast Discussion...UPDATED
National Weather Service Gray ME
1001 AM EST Thu Feb 16 2017
Low pressure will pull away today leaving behind upslope snow
showers in the mountains after snow ends this morning elsewhere.
High pressure will build into the region on Friday as the storm
departs to the maritimes. A few upslope snow showers will
linger in the mountains through Saturday but elsewhere skies
will be mainly sunny. Temperatures will warm through the weekend
reaching the mid 40s by Sunday.
.NEAR TERM /UNTIL 6 PM THIS EVENING/...
-- Changed Discussion --Update...I have allowed the warnings/advisories to expire for
all but Nrn NH. Low level moisture will linger in cyclonic flow
behind the departing low pressure...allowing bands of snow to
rotate thru the area today. Eventually we will transition to
terrain forced snow showers...where an additional several inches
is possible today.
Inverted (NORLUN) trof axis extends across western Maine and
into eastern NH. A well defined area of steady snow continues
across the this axis early this morning and will slowly
dissipate by later this morning. Have continued the winter storm
warnings in areas along this axis while further north and east
have dropped the warnings where little support remains for any
significant accumulations. Some upslope snow showers will
continue today across northern NH so have continued winter storm
warnings those areas as well. Over southwest NH some light snow
continues with some light accumulations possible over the next
few hours so have continue the winter weather advisories over
By afternoon expect the snows to come to an end over all areas
with only leftover upslope snow showers in the mountains as a
broad northwest flow aloft and at the surface develops.
Downsloping areas in the afternoon should see some clearing.
Use a blend of models for max temps which should not warm that
much during the day due to cold air advection.
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.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM FRIDAY/...
A drier and colder northwest flow expected tonight through
Friday. Gusty northwest winds can be expected. Mostly sunny
conditions on Friday can be expected except in the mountains
where some upsloping clouds and a few isolated snow showers will
.LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/...
Much quieter weather is expected in the extended period of the
forecast along with warmer temperatures. The temperatures should
peak on Sunday with high perhaps around 50 in a few locations.
There is little to no signal in the deterministic and ensemble
guidance at this point to suggest any major precipitation
systems are in the offing.
.AVIATION /15Z THURSDAY THROUGH MONDAY/...
Short Term...MVFR to IFR conditions in areas of snow this
morning will gradually improve to VFR by afternoon. In the
mountains MVFR conditions will continue in scattered snow
VFR conditions are expected tonight and Friday except locally
MVFR in any scattered mountain snow showers.
Long Term... VFR will prevail from Friday night right through
the weekend except in the mountains where HIE will see periods
of MVFR in SHSN.
Short Term...Gusty northwest winds in the wake of the exiting
coastal low will continue through the day. Northwest winds will
remain gusty tonight into Friday and probably will remain in
SCA range. In the bays SCA conditions are expected today so
SCA`s are in effect. Tonight and Friday SCA conditions are
possible and SCA` may need to be extended.
Long Term... Very quiet period on the waters with high pressure
built overhead. Expect conditions to remain below SCA right
through the start of next week.
-- Changed Discussion --ME...None.
NH...Winter Storm Warning until 7 PM EST this evening for
MARINE...Small Craft Advisory until 7 PM EST this evening for ANZ151-
Gale Warning until 7 PM EST this evening for ANZ150-152-154.
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