Area Forecast Discussion
Issued by NWS Caribou, ME

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000 FXUS61 KCAR 230418 AFDCAR Area Forecast Discussion National Weather Service Caribou ME 1218 AM EDT Fri Mar 23 2018 .SYNOPSIS... Low pressure over Nova Scotia will track toward Newfoundland tonight through Friday. An upper level disturbance will cross the region Saturday into Sunday. High pressure will build across the region later Sunday into Monday. && .NEAR TERM /THROUGH TODAY/...
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1210 AM Update: Few chgs to the prev fcst outside of incorporating latest temp/dwpts to hrly fcsts of each thru the remainder of the ngt. No chgs to fcst lows posted at 7 am Fri attm. Orgnl Disc: A complex closed upper low east of the state features a decaying center east of Cape Cod and a new center in Nova Scotia. Moisture wrapping around the backside from the Nova Scotia low in the trowal produced snow across the Down East and Bangor regions today, but will continue to decay as the vertically stacked low continues to pull northeastward towards Newfoundland tonight. Most of the snow will be over by early this evening with some coastal locations approaching 6 inches accumulation. Although there`s been a very sharp cutoff just north of Bangor towards Danforth today, the remnants of the band will make a little northward progress along the eastern border this evening with a few flurries getting as far north as a line from Millinocket towards Presque Isle. That will quickly exit and the forecast area will be left with a combination of H925-H850 moisture and some higher clouds. Thus, will maintain mostly cloudy skies for most of the region tonight into Friday, but no precipitation. These clouds and steady north winds overnight will not yield much in the way of radiational cooling as lows will only fall into the mid to upper 20s. Winds will start off gusty with initial mixing on Friday morning, but remain far under the levels experienced at Bangor and the southern half of the forecast area today. Gusts will reach 25 mph, but winds will diminish later in the day as the pressure gradient slackens between the low in the Canadian Maritimes and a powerful 1045mb high building eastward from Manitoba. Highs on Friday will reach the mid to upper 30s north and around 40F for Bangor and southern zones.
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&& .SHORT TERM /TONIGHT THROUGH SUNDAY/... A disturbance rotating around the upper low across the Maritimes will move south toward the region Friday night then begin to cross the forecast area Saturday. Skies will remain mostly cloudy across the forecast area Friday night through Saturday. Snow showers will also develop Saturday, most numerous across the north/mountains. The disturbance will move south across the region Saturday night through early Sunday. Skies will remain mostly cloudy along with snow showers Saturday night, though the snow showers will begin to diminish late. The disturbance will exit to the east Sunday, with high pressure building south toward the region late. Expect mostly cloudy skies along with a slight chance of snow showers early Sunday, with decreasing clouds during the afternoon. Temperatures will be at below normal levels Saturday/Sunday. && .LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/... High pressure will build across the region Sunday night into Tuesday. Cloud cover will decrease Sunday night. Generally expect mostly clear skies Monday into Tuesday, though cloud cover could begin to increase later Tuesday in advance of low pressure approaching from the west. However, uncertainty still exists regarding the timing of the approaching low. The low should cross the region Wednesday into Thursday with a chance of snow/rain showers. Temperatures will be at near normal, to slightly below normal, levels Monday. Near normal, to slightly above normal, level temperatures are expected Tuesday through Thursday. && .AVIATION /04Z FRIDAY THROUGH TUESDAY/... NEAR TERM: Mostly MVFR to VFR at the terminals tonight into Friday. There might briefly be lower IFR conditions through 03Z at the northern terminals in -sn. SHORT TERM: Occasional MVFR conditions are expected across mostly the north and mountains Friday night into early Saturday. Occasional MVFR conditions are expected across the entire region later Saturday through early Sunday, with brief localized IFR conditions possible with any heavier snow showers. VFR conditions are expected later Sunday into Tuesday. && .MARINE... NEAR TERM: The gale warning was dropped and a small craft advisory and was issued until 12Z/8am EDT Fri for the coastal and intra-coastal waters. The wind has diminished a bit over the past few hours and will slowly diminish overnight. Conditions are expected to be sub advisory from mid morning Friday through the remainder of the day. SHORT TERM: Conditions should generally remain below small craft advisory levels Friday night through early Saturday. Small craft advisory conditions will then develop later Saturday and persist through Sunday. However. wind gusts could approach gale levels Sunday. Visibilities could be reduced in snow showers later Saturday into Sunday. && .CAR WATCHES/WARNINGS/ADVISORIES...
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ME...None. MARINE...Small Craft Advisory until 8 AM EDT this morning for ANZ050>052.
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