Area Forecast Discussion
Issued by NWS Caribou, ME

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314 FXUS61 KCAR 241004 AFDCAR Area Forecast Discussion National Weather Service Caribou ME 604 AM EDT Sat Mar 24 2018 .SYNOPSIS... An upper level trough of low pressure will push south across the area today. High pressure will build down from the north tonight and Sunday and crest over the area Monday into Tuesday. && .NEAR TERM /THROUGH TONIGHT/...
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6 AM Update...Temperatures early this morning are showing colder readings in the valleys than higher elevations so modified early morning temps to match this. Otherwise, forecast remains on track with snow showers expected to develop later today. An upper level shortwave trough digging to our west today will combine with an inverted surface trough sliding from east to west across the area to produce snow showers, mainly this afternoon. Divergent flow out of the upper trough to our west will combined with surface convergence from the inverted trough to support lift. Sounding forecasts are showing steep lapse rates projected for this afternoon with an unstable layer expected to be up to 9K ft. Snow showers may briefly be heavy at times this afternoon with snow pellets and reduced visibilities. Any of the snow showers could produce a quick small accumulation of snow. The snow showers will taper off this evening. Skies may begin to clear from the north very late tonight as high pressure begins to build down from Quebec.
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&& .SHORT TERM /SUNDAY THROUGH MONDAY/... Sfc hipres wl be building south into CWA on Sun mrng with upr lvl heading south as upr lvl ridge axis amplifies into Quebec. May see a few lingering snow showers along the Downeast coast in the mrng but expect these wl quickly come to an end by noon. Skies wl clr fm north to south drg the day with maxes slightly blo normal values under caa. Sfc high wl dominate the area`s wx thru the end of the short term. Clr skies, calm winds and snow cvr wl allow temps to drop into the single digits acrs the north Mon mrng, about 5-8 degrees blo normal acrs entire CWA. Expect that highs on Monday wl climb to nr normal under sunny skies. && .LONG TERM /MONDAY NIGHT THROUGH FRIDAY/... High pressure builds into the maritimes at the start of the long term pd with return flow commencing on Tuesday. Upr lvl low that drifted offshore Sun mrng wl slowly retrograde twd the area by mid- week. However med range guidance shows it rmng far enuf offshore to hv minimal impact on coastal areas. Upr lvl trof and assoc frontal bndry wl bring pcpn into the region Wed ngt with warm advection expected drg the day Wed. Highs wl top out in the 40s at all locales on Wed aftn. With temps aloft warming thru Thur highs the next day wl lkly be warmer with some parts of Downeast appchg 50F for maxes. Aft this time upr trof wl be digging thru the cntrl portion of the conus and wl lkly lead to an active pattern thru the end of the weekend. && .AVIATION /10Z SATURDAY THROUGH WEDNESDAY/... NEAR TERM: MVFR to occasionally IFR conditions are expected over the north in snow showers today with VFR conditions dropping to MVFR at times Downeast. Conditions should be MVFR this evening, improving to VFR across the area late this evening. SHORT TERM: VFR Sun morning through the middle part of the week under high pressure. Potential exists for MVFR cigs beginning Wed aftn. && .MARINE... NEAR TERM: A SCA will be up from this afternoon through tonight for northeast winds gusting up to 30 kt. A few gusts late tonight may approach gale over the offshore waters. SHORT TERM: Cannot rule out gale force winds for the outer waters through early Sun afternoon. Expect SCA level winds through Mon morning before dropping to below 25kts briefly before increasing again Tue morning. && .CAR WATCHES/WARNINGS/ADVISORIES... ME...None. MARINE...Small Craft Advisory from 4 PM this afternoon to 8 AM EDT Monday for ANZ050>052. && $$ Near Term...Bloomer Short Term...Farrar Long Term...Farrar Aviation...Bloomer/Farrar Marine...Bloomer/Farrar is the U.S. government's official web portal to all federal, state and local government web resources and services.