Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 230224 AFDGYX Area Forecast Discussion National Weather Service Gray ME 1024 PM EDT MON AUG 22 2016 .SYNOPSIS... Cool high pressure builds into the area from the west tonight and Tuesday. It will move off to the east into the Atlantic on Wednesday, with warmer temperatures arriving on southwesterly winds. The warm weather continues Thursday into Friday when a cold front moves through. There will be a chance of showers as the front moves through, but otherwise expect drier and slightly cooler conditions this weekend. && .NEAR TERM /TONIGHT/...
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1030PM UPDATE... As winds have died off temperatures have begun to fall. Made a few tweaks to overnight low temperatures based on latest observations. All tweaks were in the downward direction. Forecast already mentions fog for the Connecticut River Valley which is probably a good thing seeing as temperatures are already nearing dewpoints in that area. 630PM UPDATE... Have made a few adjustments to the forecast based on latest observations. Clouds are beginning to dissipate in northern areas where they kept temperatures down during the day. Whitefield, NH popped up into the 60s as the clouds dissipated the last few hours. This should allow them to cool off well tonight as well. No other changes were needed at this time. ORIGINAL DISCUSSION... Gusty cold advection NW flow continues into the evening. Largest 3 hour pressure changes are occurring right about the strongest gusts should be in the next couple of hours before diminishing. Gradient flow continues into the I am expecting a slow fall of temps until late. A much drier air mass will support cool temps compared to recent nights for anyone that can decouple. I suspect far northern valleys will be able to decouple and fall into the lower 40s in places.
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&& .SHORT TERM /TUESDAY AND TUESDAY NIGHT/... High pressure will be in control Tuesday. Winds will be lighter and temps similar to today. Without the wind it will feel a little warmer though. Weak gradient across the area will support afternoon sea breezes on the coast...which will cool things off slightly for the second half of the day. Better chance for radiational cooling Tuesday night...with patchy valley fog developing in the favored locations. && .LONG TERM /WEDNESDAY THROUGH MONDAY/... Return flow around high pressure south of New England will bring warmer and more humid air back into the region on Wednesday. Expect mostly sunny skies through the day with highs ranging through the 80s to near 90. Skies will remain mostly clear Wednesday night with lows from the mid 50s north to the mid 60s south. Should see a little more in the way of cloudiness on Thursday as a warm front crosses southern Canada. Expect any shower activity associated with this boundary to remain north of the border. Highs will once again range through the 80s. A cold front will approach from the west Thursday night bringing a chance of showers and thunderstorms to the region Mainly after midnight. Should see a mild night with lows ranging through the 60s. Cold front will cross the region friday morning bringing clearing skies and cooler less humid air in on northwest winds. Highs on Friday will range from the upper 70s north to the upper 80s south. High pressure building in from the west Friday night and Saturday will set the stage for a mostly sunny weekend. Expect seasonable temperatures both days with highs from the mid 70s north to the mid 80s south. && .AVIATION /00Z TUESDAY THROUGH SATURDAY/...
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Short Term...With winds dying off fog is a possibility mainly in the western valley locations like Whitefield and Lebanon. Confidence still not high enough to hit too hard with the TAF, but did mention temporary restrictions at Whitefield. Otherwise...southern NH and coastal ME terminals should maintain enough gradient flow to preclude fog development tonight. High pressure dominating Tuesday may allow sea breezes to develop along the coast...but otherwise VFR conditions. Long Term...Generally VFR Wednesday through Thursday. Areas of MVFR ceilings and vsby in Showers and thunderstorms Thursday night. VFR Friday through Saturday.
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&& .MARINE... Short Term...Gusty NW winds will continue into the evening on cold advection. A few gusts may approach 25 kts...but in general winds and seas will remain below SCA thresholds. Winds and seas both diminish Tuesday. Long Term...SCA`s may be needed Thursday in increasing southwest flow. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...None. NH...None. MARINE...None. && $$ SYNOPSIS...Kimble NEAR TERM...Kimble SHORT TERM...Legro LONG TERM...Sinsabaugh is the U.S. government's official web portal to all federal, state and local government web resources and services.