Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 091117 AFDGYX Area Forecast Discussion National Weather Service Gray ME 617 AM EST Fri Dec 9 2016 .SYNOPSIS... Some of the coldest air of the season will begin to move in today in the wake of a cold front. Mountain snow showers will continue through the day...with several inches of snow possible north of the notches. High pressure will build in for the weekend continuing cold temperatures. A low will approach the region on Monday with snow spreading across the region, possibly with mixed precipitation in southern zones. Cold high pressure looks to move in for Tuesday. && .NEAR TERM /UNTIL 6 PM THIS EVENING/...
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615 AM Update...Little change to the going forecast. Snow showers and flurries downwind of the mountains have come to an end for the most part. Upslope snow showers should however continue all day in the Whites. Winds increase and gust to around 30 MPH today with near-steady temperatures. Previously... A cold frontal boundary traversing the region will move offshore early this morning. Widely scattered snow squalls in the mountains and possibly foothills may occur prior to 12z. One or two may reach the coastal plain. Otherwise, upslope snows in the Whites will get going today and add up to several inches on western/northwestern slopes. A few of the most favored locations may pick up 4 to 6 inches. Otherwise, cold and windy conditions will be the rule today, with temperatures not budging much at all. In fact they may actually drop some this afternoon. Good mixing will also promote wind gusts around 30 mph. By late afternoon and early evening, wind chill values are expected to be in the teens area-wide (lower in the mountains).
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&& .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SATURDAY/... Cold northwest winds continue tonight with temperatures dropping into the teens and single digits. Mixing should continue overnight and should not allow the winds to completely die off. Therefore, wind chill values may approach zero degrees even on parts of the coastal plain. Upslope snow showers are likely to continue this evening then gradually wane overnight. A cold day is in store for Saturday with highs in the teens and 20s. However, winds are not expected to be as strong as today`s. Otherwise, partly sunny skies are expected. && .LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
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High pressure will continue to build in from the west Saturday night. Expect variable cloudinesss overnight with lows ranging through the single numbers north and lower to mid teens south. High pressure will shift offshore on Sunday as a warm front approaches from the southwest. Should see at least partly sunny skies for most of the day before high clouds move in from the west late in the day. Highs will range from the mid teens to mid 20s north and mid 20s to near 30 south. Low pressure moving through the southern Great lakes Sunday night will lift a broad area of over-running into the region ahead of a warm front. Expect light snow to gradually over- spread the region from southwest to northeast overnight. GFS QPF pretty much in line with the ECMWF producing snow accumulations by daybreak Monday in the 1 to 3 inch range with highest amounts in southwest New Hampshire. Lows overnight will range through the teens north and upper teens to lower 20s south. Warm front will lift into central New England on Monday as low pressure pushes in from the west. Expect snow to continue in inland locations on Monday as best over-running ahead of the warm front sets up over the region. Moderate to occasionally heavy snow will be likely in favorable upslope locations in Maine and New Hampshire with the coastal areas going over to a mix and then to rain as warmer air pushes in on Strong onshore flow. North of the change-over interior sections will see the potential for another 3 to 6 inches during the day with lesser amounts in the far north and along the coast. Highs Monday will through the 20s to near 30 inland and in the lower to mid 30s along the coast. Expect snow and rain or mixed precip to taper off Monday afternoon in southern and central zones as best over-running lifts into northern Maine and a cold front swings in from the west. Far northern zones could see several additional inches of snow Monday evening north of the front and in snow showers as as upslope kicks in behind departing low pressure. Looking for partial clearing downwind of the mountains. Lows overnight will range from the mid teens north to the mid 20s south. Narrow ridge of high pressure will build in from the west on Tuesday producing a mix of sun and clouds high temps close to normal. Will generally see 20s north and lower to mid 30s south. A cold front will approach from the west Tuesday night and this boundary will stall over the region by Wednesday morning. Expect increasing clouds overnight with a chance of snow showers by morning in far northwest zones. Lows overnight will range through the teens inland to the lower 20s along the coast. Stalled front boundary will be the focus for Light over-running snow on Wednesday with some minor accumulations possible in the afternoon as a broad shallow shortwave swings in from the west and spins up weak surface low pressure over the region. Highs will range from the mid 20s to mid 30s. Expect snow to gradually wind down Wednesday night as low pressure intensifies offshore and downslope flow kicks in behind departing low.
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&& .AVIATION /11Z FRIDAY THROUGH TUESDAY/... Short Term...NW flow strengthens today in the wake of a cold front, allowing for gusts of 25 to 30 kt. VFR conditions are expected today except perhaps at HIE where rounds of SHSN drop VSBYs to IFR or lower at times. VFR conditions are expected tonight and Saturday with diminishing winds. Long Term... VFR Saturday night and Sunday. IFR/LIFR ceilings/vsby developing Sunday night and persisting through Monday. Becoming VFR downwind of the mountains Monday night with areas of MVFR/IFR ceilings in the north. VFR Tuesday. && .MARINE... Short Term...Marginal gales continue on the ocean waters today while SCA continues for the bays. Winds gradually diminish tonight and Saturday. Long Term... SCA`s likely Monday and early Tuesday. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...None. NH...None. MARINE...Small Craft Advisory until 11 PM EST this evening for ANZ151- 153. Gale Warning from 10 AM this morning to 11 PM EST this evening for ANZ150-152-154. && $$ NEAR TERM...Ekster SHORT TERM...Ekster LONG TERM...ES is the U.S. government's official web portal to all federal, state and local government web resources and services.