Area Forecast Discussion
Issued by NWS Caribou, ME

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000 FXUS61 KCAR 170444 AFDCAR Area Forecast Discussion National Weather Service Caribou ME 1244 AM EDT Sat Mar 17 2018 .SYNOPSIS... Low pressure will remain northeast of the region through the weekend. High pressure will build across the region Monday into Tuesday. && .NEAR TERM /THROUGH TODAY/...
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12:44 am: Only minor tweaks to the forecast. Expanded the area of isolated snow showers a bit further south and east into central Hancock and Washington Counties for a few hours. Otherwise, only minor changes based on the latest observations. Orgnl Disc: Deep low pressure to our northeast combined with high pressure building in from central Canada will be pushing some bitter cold Arctic air into the region this weekend. The Arctic front is expected to cross the area late this evening, possibly with a gusty snow shower across parts of the north. Frigid Arctic air will then push in from the northwest upon gusty northwesterly winds tonight into Saturday. Upper level low pressure nearby to the east on Saturday will combine with surface low pressure northeast of the area to carry moisture across the north. The bitter cold air will mean this moisture will be quick to glaciate. Stratocumulus clouds, fine snow showers, patchy blowing snow and bitter wind chills can be expected over the north through the day Saturday. Downeast will be partly to mostly sunny with a gusty cold wind.
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&& .SHORT TERM /TONIGHT THROUGH MONDAY/... Surface/upper level low pressure will remain near Labrador Saturday night through Monday, with high pressure to the west. At the same time, several disturbances rotating around the upper low will cross the region. Generally expect partly cloudy skies across the north/mountains Saturday night through Monday, along with a slight chance of mostly diurnally driven snow showers. Partly cloudy/mostly clear skies are expected Downeast Saturday night through Monday. Temperatures will be at below normal levels Sunday/Monday. && .LONG TERM /MONDAY NIGHT THROUGH FRIDAY/... High pressure builds across the region Monday night through Tuesday, with low pressure also intensifying across the Mid-Atlantic region Tuesday. The low should lift toward the Maritimes Wednesday into Thursday, while high pressure remains ridged northwest of the region. Uncertainty still exists regarding the timing, track and intensity of the low. Precipitation with the low should be in the form of snow, though amounts are also still uncertain. At this time, The better chances of snow appear to be across central and Downeast areas. High pressure ridged to the northwest could limit snow potential across northern areas. The low should exit across the maritimes Friday, leaving a chance of snow showers across the forecast area. Near normal, to slightly below normal, level temperatures are expected Tuesday/Wednesday. Near normal level temperatures are expected Thursday/Friday. && .AVIATION /06Z SATURDAY THROUGH WEDNESDAY/... NEAR TERM: VFR to occasionally MVFR conditions can be expected across the north tonight into Saturday. VFR conditions are expected Downeast tonight into Saturday. SHORT TERM: Occasional MVFR conditions are expected across the north and mountains Saturday night through Sunday night, with generally VFR conditions Downeast. Generally expect VFR conditions across the region Monday/Tuesday. Dependent on the timing of the approaching low, MVFR/IFR conditions could develop Wednesday. && .MARINE... NEAR TERM: A SCA will continue through Saturday for northwest winds gusting up to 30 kt. Some light freezing spray is likely through Saturday morning, especially early in the morning. SHORT TERM: Small craft advisory conditions are expected Saturday night through Monday. Light freezing spray is expected Saturday night into Sunday. && .CAR WATCHES/WARNINGS/ADVISORIES... ME...None. MARINE...Small Craft Advisory until 8 AM EDT Sunday for ANZ050>052. && $$ Near Term...CB/VJN Short Term...Norcross Long Term...Norcross Aviation...CB/VJN/Norcross Marine...CB/VJN/Norcross is the U.S. government's official web portal to all federal, state and local government web resources and services.