Area Forecast Discussion
Issued by NWS Caribou, ME

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156 FXUS61 KCAR 190232 AFDCAR Area Forecast Discussion National Weather Service Caribou ME 932 PM EST Thu Jan 18 2018 .SYNOPSIS... High pressure will build across the region through Friday night. Low pressure moving across southern Canada during the day on Saturday will bring some precipitation to the northern parts of the forecast area. High pressure then returns until Tuesday when a much stronger storm system moves into the area. && .NEAR TERM /THROUGH FRIDAY/...
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930 pm update... Low clds continue to plague cntrl and nrn portions of CWA with Downeast areas clear tonight. This is playing havoc with current temps as areas along the coast are down near 10F with nrn zones around 20F. Sky cover wl lkly make all the difference with mins tonight with coldest areas acrs Downeast unless nrn zones can clear out briefly. At this time it wl be a race btwn low clds eroding and thicker mid-clds mvg into the north late tonight. Sfc bndry conts to result in flurries in the St. John Vly and expect these wl diminish in the next svrl hrs. Minor adjustments to hrly temps rmndr of the night. Prev discussion blo... Should be a rather quiet evening. Clouds in place over the northern third of the CWA, with mostly clear skies along the coast. A weak impulse riding through zonal flow aloft could generate some weak snow showers over the western portions of the forecast area, with little or no accumulation expected. This is being picked up nicely by both the operational Euro and to a lesser extent the NAM.
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&& .SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY/... Weak ridging moves in for tomorrow. Weak subsidence will be enough to suppress showers, but not quite strong enough to rid the area of clouds. Expect increasing clouds as the day progresses and low pressure approaches the region from the west. && .LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/... Low pressure passing to the north of the area early Saturday will bring some showers to the northern sections of the CWA. This system appears to be a fast mover and should be gone by Saturday afternoon. It may be strong enough though to produce an inch or so of snow over extreme northern portions of Maine. In it`s wake will be two days of quiet weather on Sunday and Monday before the next system arrives. Low pressure moving through the Great Lakes region on Tuesday will bring precipitation to the region Tuesday and Wednesday. This system looks like it will be the most robust of the forecast period. It is still many days out though, but we will be watching it to try and determine an exact track and timing. && .AVIATION /03Z FRIDAY THROUGH TUESDAY/... NEAR TERM: VFR for all terminals though a brief MVFR cig will be possible for northern sites tonight. Impact wl be minimal and wl not include in forecast at this time. May see MVFR set in to the north of HUL Fri afternoon. SHORT TERM: Expect VFR conditions tomorrow, then deteriorating to MVFR during the afternoon hours, and then possibly IFR conditions tomorrow night and Saturday as low pressure passes north of the region. && .MARINE... NEAR TERM: No flags expected. SHORT TERM: A small craft advisory will likely be need on Saturday as low pressure moves though. && .CAR WATCHES/WARNINGS/ADVISORIES... ME...None. MARINE...None. && $$ Near Term...Pohl - GYX/Farrar is the U.S. government's official web portal to all federal, state and local government web resources and services.