Area Forecast Discussion
Issued by NWS Portland, ME

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226 FXUS61 KGYX 170155 AFDGYX Area Forecast Discussion National Weather Service Gray ME 955 PM EDT Mon Oct 16 2017 .SYNOPSIS... High pressure will build in from the west overnight and will hold south of New England through Wednesday. A cold front will approach from the west on Thursday and will cross the region Thursday night. High pressure will build in from the west on Friday and will hold over the region through the weekend. && .NEAR TERM /UNTIL 6 AM TUESDAY MORNING/...
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955 pm Update: Input latest mesonet data. Only minor tweaks to sky/temp grids needed. 630 pm Update: Temps continue to fall as winds slowly abate. Input latest obs data and made minor temp based teaks. No other changes. Previous Discussion: Chilly and breezy conditions will continue into this evening as cold air advection continues. In addition, cirrus streaming in from the south will make for variable cloudiness into the evening hours before moving offshore. Across the mountains, moist NWLY upslope flow will allow for mostly cloudy conditions into early evening before gradually dissipating as well. Temperatures will be chilly tonight, with lows mainly in the 30s (with 20s in the northern interior). However, will forgo frost advisories on the coastal plain where the growing season is still technically active. With a second wave of CAA expected this evening in association with the passage of a short wave trough, winds should stay up just enough to preclude widespread frost overnight. Will forecast patchy frost at this time, but do not think frost coverage will be there to warrant an advisory.
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&& .SHORT TERM /6 AM TUESDAY MORNING THROUGH TUESDAY NIGHT/... High pressure crests over the region Wednesday morning before moving offshore during the afternoon hours. WAA will take over as a result with winds turning more southwesterly during the afternoon. Some WAA clouds may sneak into northern zones during the late afternoon and overnight hours. However, it is expected to remain dry. && .LONG TERM /WEDNESDAY THROUGH MONDAY/... Models in fairly good agreement through the week and into the the weekend with the emphasis on quiet weather and above normal temps. High pressure south of New England on Wednesday will bring warmer air back into the northeast. The day should feature mostly sunny skies with highs from the upper 50s to mid 60s north and mid to upper 60s south. Quiet weather will continue Wednesday night with lows ranging through the 40s. Another nice day on tap for Thursday as a moisture starved front approaches from the west. Temperatures will top out well above normal under mostly sunny skies. High will range from the mid 60s north to the lower 70s in the south. Cold front will cross the area Thursday night with just a few passing clouds and a wind shift. Lows by Friday morning will again range through the 40s. High pressure will build in from the west on Friday and will park over the northeast through the weekend. Not a lot of cold air penetrating southward behind the front so looking for highs on Friday once again above normal with readings ranging through the 60s. High pressure will gradually shift offshore over the weekend. Aside from variable high clouds expect mostly sunny skies both days with highs in the 60s north and upper 60s to lower 70s south. Fair weather will extend into early next week before a cold front brings rain and more seasonable temps back into the picture Monday night and Tuesday. && .AVIATION /02Z TUESDAY THROUGH SATURDAY/... Short Term...VFR conditions are expected tonight through Tuesday night. Portions of the CT River Valley will see some higher-end MVFR CIGS early this evening before lifting to VFR. Long Term...VFR Wednesday through Saturday. && .MARINE... Short Term...SCA through tonight for the ocean waters for NWLY winds gusting around 25 kt. Marginal SCA winds may develop Tuesday night in southwesterly flow around departing high pressure. Long Term... SCA`s may be needed on Thursday. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...None. NH...None. MARINE...Small Craft Advisory until 5 AM EDT Tuesday for ANZ150-152-154. && $$ NEAR TERM...Marine

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