Area Forecast Discussion
Issued by NWS Caribou, ME
FXUS61 KCAR 271944
Area Forecast Discussion
National Weather Service Caribou ME
344 PM EDT Mon Mar 27 2017
A series of weak low pressure systems from Southern Quebec will
move east crossing just south of the region tonight through
Tuesday night. Canadian high pressure will then build toward
the region Wednesday through Thursday.
.NEAR TERM /THROUGH TUESDAY/...
Steady precipitation associated with short wave crossing the
region this afternoon should diminish from west to east through
early this evening. Surface temperatures across the region have
remained generally in the mid to upper 20s across the north and
low 30s downeast with precip type mainly snow across the north
and a wintry mix central and downeast. Will continue the Winter
Weather Advisories into this evening. Once the steady
precipitation associated with the exiting short wave exits the
region this evening, expect cloudy skies overnight with
lingering light snow or patchy freezing drizzle, as abundant
low level moisture remains in place. Lows tonight are not
expected to fall much from current afternoon readings with mid
to upper 20s across the north and lower 30s downeast.
Another batch of steady precipitation is expected to overspread
the area Tuesday morning in advance of the next approaching
disturbance. Temperatures are expected to moderate on Tuesday
with precipitation across the north starting as a mix or snow
before transitioning to rain, with mainly rain expected
Highs on Tuesday should rise into the mid to upper 30s north and
lower 40s downeast.
.SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY/...
The back edge of the last ovrrng precip shield will be movg E of
the region with lgt rn chgng to lgt sn spcly across the N hlf of
the region before tapering off to sct sn shwrs ovrngt with any
accumulation arnd an inch or less. Otherwise, xpct mcldy skies
late Tue ngt thru Wed with morn sn and aftn rn/sn shwrs spcly
across the N. Shwrs should msly dissipate Wed eve with slow
decreasing cldnss from S to N late Wed ngt and Thu. Temps thru
the short range will be at or a little below avg for this tm of
.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...
Artic air will be msly in retreat thru the long range with the
Srn edge ovr Nrn Can by the weekend, so temps in the long range
should avg close to normal for this tm of season, with milder
ovrngt lows offsetting cooler day tm highs.
Otherwise...skies will will be fair Thu ngt into Fri as sfc hi
pres crosses the region from QB prov...with increasing cldnss
late Fri and Fri ngt as low pres systems from the Great Lks and
Mid Atlc states consolidate ovr the Srn Gulf of ME. The 12z
suite of all model guidance was less certain about the track and
how much QPF from this system will affect our region from late
Fri ngt thru Sat ngt or even into Sun morn, so model blended
PoPs were actually capped to a max of hi chc for Sat/Sat eve
until later model runs come into a better scenario agreement.
Typical as we get later into spring, with the absence or
uncertainty of strong dynamics...precip types begin to become
more dictated by diurnal/nocturnal temp trends, meaning more in
the way of sn in the ovrngt and erly morn hrs and more in the
way of rn from late morn into the erly eve hrs.
Following any impacts from this system, there should be a break
between systems Sun aftn thru Mon.
.AVIATION /19Z MONDAY THROUGH SATURDAY/...
NEAR TERM: IFR expected overnight in precipitation, patchy fog,
low ceilings. Expect these conditions to persist into much of
SHORT TO LONG TERM: IFR clgs/vsbys in lgt rn/sn Tue eve will
transition to MVFR conditions in shwrs late Tue ngt. MVFR clgs
and ocnl vsbys in sn/rn shwrs will cont thru the day ovr Nrn
TAf sites Wed while Downeast sites improve to VFR. All sites
will be VFR Wed ngt into Fri ngt...lowering to MVFR/IFR in rn/sn
late Fri ngt into Sat.
NEAR TERM: Small craft advisory remains in effect overnight with
wind/seas dropping below small craft advisory criteria on
SHORT TO LONG TERM: Marginal SCA or no hdlns are xpctd thru
these ptns of the fcst. Kept close to WW3 wv guidance thru these
ptns of the fcst.
ME...Winter Weather Advisory until 10 PM EDT this evening for
Winter Weather Advisory until 8 PM EDT this evening for MEZ029-
MARINE...Small Craft Advisory until 3 AM EDT Tuesday for ANZ050>052.