Scientific Forecaster Discussion
Area forecast discussion
National Weather Service Caribou ME
414 PM EST Tuesday Dec 10 2013
a strong cold front will approach late tonight...then cross the
region Wednesday. Arctic high pressure will cross the region
Thursday. Weak low pressure will cross the region Friday.
Near term /through Wednesday/...
weak low pressure south of the coast will quickly move away to the
east this evening. Otherwise, tonight will be partly cloudy and
turning colder with temperatures falling into the single digits north and
teens downeast. Some streamers of moisture from the Saint Lawrence
will give some flurries and snow showers to far northern areas
this evening. A small disturbance along an Arctic front will then
approach late tonight and cross the north Wednesday morning. Some
snow showers will be possible with this disturbance Wednesday
across the north and northwestern areas. Bitter cold Arctic air
will then begin to push into the region behind the front late
Short term /Wednesday night through Friday/...
the cold front will exit the region Wednesday evening. Could have
lingering snow showers across the forecast area Wednesday
evening. Otherwise...expect partly/mostly cloudy skies across
northern areas Wednesday night with partly cloudy skies downeast.
Much colder air will move across the region in the wake of the
cold front Wednesday night. Wind chill advisories could be
needed across northern and northwestern portions of the forecast
area Wednesday night. Generally partly sunny skies are expected
across northern areas Thursday...with partly/mostly sunny skies
downeast. A clipper system will approach from the west Thursday
night and cross the region Friday...though the exact timing of the
system is still uncertain. Generally expect increasing clouds
across the region Thursday night with a chance of snow showers
late. Low temperatures Thursday night will be dependent on how
rapidly cloud cover increases. However...generally expect
temperatures ranging through the single digits below zero to
around 10 below zero north...to the single digits above zero
downeast. The clipper system will then cross the region Friday
with a chance of light snow or snow showers...drawing another cold
front across the region. Conditions should then begin to improve
later Friday in the wake of the clipper. High temperatures Friday
will be dependent on the timing of the clipper system and cold
front. However...temperatures should remain at below normal levels.
Long term /Friday night through Tuesday/...
high pressure will cross the region Friday night through Saturday.
Intensifying low pressure will then track east of the Gulf of Maine
Sunday...though the exact track of the low is still uncertain. The
low could bring significant accumulating snow to the forecast area
Sunday into Sunday night...though snow totals and the location of
the heaviest snow will be dependent on the eventual track of the
low. The low will exit across the Maritimes Monday...with snow
showers possibly lingering early. Cloud cover will then decrease
later Monday. High pressure should then build east toward the
region Tuesday. Temperatures will remain at below normal levels
Saturday through Tuesday.
Aviation /21z Tuesday through Sunday/...
near term: mainly VFR conditions are expected tonight and
Wednesday. The exception will be some occasional MVFR conditions
in snow showers over the far north this evening and again early
Short term: occasional MVFR conditions could occur across the
entire forecast area early Wednesday night...with lingering MVFR
conditions possible overnight across northern areas. Occasional
MVFR conditions could persist across northern areas Thursday...with
VFR conditions downeast. MVFR conditions will develop across much
of the region later Thursday night. MVFR conditions are then
possible across the entire region into early Friday
afternoon...with improving conditions later Friday afternoon. VFR
conditions are expected across the region Friday night through much
of Saturday. Conditions will lower to MVFR/IFR levels Saturday
night. Conditions will range from MVFR to LIFR across the forecast
near term: an Small Craft Advisory will be up tonight and Wednesday for winds
gusting over 25 knots. Seas will generally range from 3 feet in the
bays to 6 feet offshore.
Short term: Small Craft Advisory conditions are expected across
the waters much of the time from Wednesday night through Saturday
night. Gale conditions are then possible Sunday. Visibilities
could be reduced in snow showers Friday. Visibilities will be
reduced in rain/snow Sunday.
Marine...Small Craft Advisory from 9 PM this evening to 7 am EST
Thursday for anz052.
Small Craft Advisory until 7 am EST Thursday for anz050-051.