Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 261121 AFDGYX Area Forecast Discussion National Weather Service Gray ME 721 AM EDT TUE JUL 26 2016 .SYNOPSIS... High pressure will build in from the west today through tonight. A weak cold front will approach from the north on Wednesday and will drop south and stall over the region Wednesday night and Thursday. High pressure will build in from the north Thursday night through Friday as low pressure passes out to sea south of New England. High pressure will hold over New England through the weekend. && 11z update... Quick update to adjust temp/td/sky grids. Expect fog and stratus from Portland to the mid coast to quickly clear over the next hour or two. Fair amount of upstream moisture will keep skies mostly cloudy in the mountains this morning with a mix and sun and clouds developing downwind of the mountains. No other changes planned attm. && Previous discussion... .NEAR TERM /UNTIL 6 PM THIS EVENING/... Slightly cooler and less humid air will filter into the region on northwest winds today as high pressure builds in from the west. Should see a mix of sun and clouds with highs from the mid 70s to lower 80s north and mid to upper 80s south. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM WEDNESDAY/... High pressure will hold over the region tonight producing light winds and mostly clear skies. Lows will range from the mid 50s north to the mid 60s south. Weak cold front will drop south through southern Quebec on Wednesday and may produce a stray showers or thunderstorm in far northern zones by late in the day. Elsewhere looking for mostly sunny skies with highs ranging through the 80s to near 90 in southern New Hampshire. && .LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/... A slow moving cold front approaches from Canada Wednesday night. All models now more in line with the timing of the passage of the fropa from northwest to southeast, exiting slowly into the coastal waters by Thursday evening. The greatest chance for showers and storms will be Thursday afternoon into early Thursday evening. Modeled CAPE values indicate a significant destabilization of the atmosphere over southern areas during that period. The surface front becomes hung up in the Gulf of Maine Friday, before sagging further to the south, to southern New England late in the day. Low pressure then follows this surface feature, tracking along it and off the southern New England coastline Friday night. New Euro is in better agreement with the 00Z GFS, placing the surface front and the development of low pressure mainly too far to our south to allow for precip in the region over the weekend. However, due to uncertainty from run to run, have included a chance for showers over the weekend as additional waves of low pressure may follow along the front. && .AVIATION /11Z TUESDAY THROUGH SATURDAY/... Short Term...VFR today through Wednesday. Long Term...A cold front crosses the area Thursday with MVFR conditions in scattered showers and thunderstorms. Mainly VFR conditions return Friday. An area of low pressure passing south of the area Saturday may lower conditions depending on the northern extent of the system. && .MARINE... Short Term...no flags. Long Term...Conditions to remain below SCA criteria through the outlook period. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...None. NH...None. MARINE...None. && $$

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