Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 242207 AAA AFDGYX Area Forecast Discussion...UPDATED National Weather Service Gray ME 607 PM EDT Sun Sep 24 2017 .SYNOPSIS... High pressure will hold over the region tonight through Tuesday night with temperatures remaining well above normal. A cold front will approach from the west on Wednesday and will cross the region Wednesday night. The front will push offshore early Thursday followed by a narrow ridge of high pressure. A secondary cold front will drop south through the region on Friday. High pressure will build in from the west for Saturday and Sunday. && .NEAR TERM /UNTIL 6 AM MONDAY MORNING/...
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607 PM Update... Minor changes to adjust temperature and dew point trends. No clouds across the region but some haze is noted. Fog will be more widespread tonight than last night as dew point depressions are lower. Previous discussion... Hot temperatures for this time of year continue as of this Sunday afternoon, with many temperatures in the 87-90 range. A weak sfc trough moving southeastward across the mountains has cooled things off a little bit up that way. This trough will settle southeastward on the coastal plain tonight and pretty much wash out. It`ll be a relatively warm and humid night with patchy fog expected - perhaps a little more widespread than last night as low level moisture has increased.
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&& .SHORT TERM /6 AM MONDAY MORNING THROUGH MONDAY NIGHT/... General deep layer ridging will continue over New England on Monday. This will mean another day of light winds and very warm temperatures. Highs may be a couple of degrees less than Sunday`s values but still firmly entrenched in the mid to upper 80s except on the immediate coast where a more robust seabreeze is expected on Sunday. There is also a slight chance of an isolated pop-up shower or thunderstorm in the Whites due to differential heating, but again a very low prob. Patchy fog will be likely again Monday night. && .LONG TERM /TUESDAY THROUGH SUNDAY/... Broad upper level ridge will remain in place over the northeast on Tuesday with high temps once again running well above normal. Highs in inland locations will top out in the mid to upper 80s. Once again light gradient across the region will allow a sea breeze to develop in the afternoon capping temps in the upper 70s to lower 80s along the coast. Fair weather will continue Tuesday night with lows in the upper 50s north to the mid 60s in the south. Cold front will approach from the west on Wednesday. Should be enough moisture and and instability to pop of a few showers or thunderstorms in northwest zones by late in the day but not looking for anything too widespread. Cold front will move in from the west Wednesday night and will shift offshore by Thursday morning. Expect scattered showers and a few thunderstorms overnight with the best chance of precip in northern zones. Cooler and drier air will flood into the region on an increasing northwest flow on Thursday. Looking for a mix of sun and clouds in the mountains and mostly sunny skies elsewhere. Highs will range from the upper 60s north to the mid 70s south. Narrow ridge of high pressure will hold over the region Thursday night producing mostly clear skies and lows ranging through the 40s to near 50. Moisture starved shortwave will swing in from the west on Friday with an associated cold front dropping south through the region in the afternoon. Expect increasing clouds with a chance of showers...mainly during the afternoon and evening. Highs will range from the upper 50s north to the upper 60s south. Lingering showers Friday evening will push east and clearing skies will set in after midnight as high pressure builds in from the west. Lows overnight will range through the 40s. High pressure will continue to build in from the west on Saturday and will hold through the weekend. Expect highs both Saturday and Sunday in the 60s with lows at night in the 40s. && .AVIATION /22Z SUNDAY THROUGH FRIDAY/... Short Term...VFR conditions are expected for the most part through Monday night. However, a brief period of IFR will be possible late tonight and again Monday night in fog due to an increase in low level moisture. Long Term... VFR Tuesday through Wednesday. Areas of MVFR ceilings Wednesday night. VFR Thursday and Friday. && .MARINE... Short Term...Small craft conditions are not expected through Monday night. However, some marine will be possible at times. Long Term... No problems noted. && .CLIMATE...
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Several high temperature records were broken or tied today in the region: *A record high temperature of 89 degrees was set at Manchester, tying the previous record of 89 set in 2010. *A record high temperature of 91 degrees was set at Concord NH, breaking the old record of 90 set in 2010. *A record high temperature of 87 degrees was set at Augusta today, breaking the old record of 85 set in 1961.
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&& .GYX WATCHES/WARNINGS/ADVISORIES... ME...None. NH...None. MARINE...None. && $$ NEAR TERM...Hanes SHORT TERM...Ekster LONG TERM...Sinsabaugh

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