Area Forecast Discussion
Issued by NWS Caribou, ME

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000 FXUS61 KCAR 180748 AFDCAR Area Forecast Discussion National Weather Service Caribou ME 348 AM EDT Sun Mar 18 2018 .SYNOPSIS... An unseasonably cold air mass will remain in place across the region through early this week as high pressure slowly builds to the south of the area. Low pressure will pass well south of the Maine Wednesday, but may move closer to the area late in the week. && .NEAR TERM /THROUGH TONIGHT/... An air mass more typical of mid winter will remain entrenched across the region today. A broad and deep upper low covers eastern Canada with low centers off the Newfoundland coast and across northern Quebec early this morning. The low in Quebec will slide southeast and across the area tonight. A northwest flow will continue between high pressure in central Canada and low pressure east of the Maritimes. The flow aloft becomes diffluent later today ahead of the incoming upper low. The combinaton of increasing instability below 850H due to strong March solar heating and cold air aloft will likely generate some instability snow showers this afternoon, mainly across the northern zones. Temperatures will continue to be more January like with highs in the teens north to the mid 20s at Bangor and along the coast. A gusty northwest wind will add to the chill with wind chills 5 to 15 below early this morning in the north. Any snow showers should diminish with the loss of daytime heating. Can`t entirely rule out some flurries or an isolated snow shower as the upper low crosses the region tonight, but it looks moisture starved so not expecting much, if anything. Otherwise, partly cloudy and continued cold with lows mostly in the single digits to teens along the coast. && .SHORT TERM /MONDAY THROUGH TUESDAY/... Low pressure at the surface and aloft will remain in the vicinity of Labrador on Monday with continued Northwest flow across northern Maine. Across northern and central areas, expect partly sunny skies along with the continued chance for a stray snow shower or flurry. Across down east, expect mainly sunny conditions. Highs will continue to be well below normal for this time of year. Expect mainly clear to partly cloudy skies across the region Monday night, with lows continued below normal. On Tuesday, high pressure will continue to build across central Canada as an area of low pressure begins to move east of the mid atlantic region. Expect partly to mainly sunny skies across the region on Tuesday. Highs on Tuesday will be a few degrees warmer but still below normal for this time of year. && .LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/... Low pressure will begin to move east from the mid atlantic region Tuesday night and then northeast on Wednesday, as high pressure builds across Quebec. Expect mainly to partly cloudy skies Tuesday night and partly to mostly sunny skies on Wednesday. Low pressure will then track northeast Wednesday night and then toward central Nova Scotia on Thursday. Expect increasing cloudiness Wednesday night. Mainly cloudy skies can be expected on Thursday with a chance( 30 to 40%) of snow across eastern areas as the low tracks northeast toward Nova Scotia. It should be noted that the Canadian Hemispheric tracks the low further west than both the EC/GFS, and take it through the gulf of Maine on Thursday. The low will then continue to track northeast toward New Foundland/Labrador Thursday night through Friday, with partly to mainly cloudy skies expected. Looking ahead toward next weekend, mainly dry weather is expected. && .AVIATION /07Z SUNDAY THROUGH THURSDAY/... NEAR TERM: VFR expected at the Downeast terminals through tonight. At the northern terminals, MVFR ceilings will likely develop this afternoon with brief IFR in isolated to scattered snow showers. Conditions should improve to VFR tonight. A gusty wind may produce some local blowing snow this afternoon. SHORT TERM: VFR weather conditions expected Monday through Wednesday. Thursday could see MVFR conditions or lower in developing snow. && .MARINE... NEAR TERM: A small craft advisory remains in effect through tonight. The strongest wind will likely be this afternoon into this evening with wind gusts to 30 knots. SHORT TERM: Small craft advisory conditions are expected Monday and Monday night and then again Wednesday and Thursday. && .CAR WATCHES/WARNINGS/ADVISORIES... ME...None. MARINE...Small Craft Advisory until 8 AM EDT Monday for ANZ050>052. && $$ Near Term...CB Short Term...Duda Long Term...Duda Aviation...CB/Duda Marine...CB/Duda is the U.S. government's official web portal to all federal, state and local government web resources and services.