Area Forecast Discussion
Issued by NWS Portland, ME
Issued by NWS Portland, ME
534 FXUS61 KGYX 021052 AFDGYX Area Forecast Discussion National Weather Service Gray ME 552 AM EST Sun Nov 2 2025 .SYNOPSIS... High pressure builds in through today with seasonably cool temperatures and much less wind. A series of shortwave troughs move through next week, bringing generally cool and at times unsettled conditions. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... 550am Update...Quick update to cancel the remaining SCA. Winds and seas will continue to subside as high pressure passes through the eastern CONUS. Previous Discussion... Cool today, but less windy. Mostly sunny skies brought by passing high pressure will feel nice after the breezy start to November. Steady airmass will provide temps similar to yesterday, widespread low 50s, with highs around 40 for points in the mountains/valleys. Stratus has been slowly eroding overnight into daybreak, but it will be hard to completely remove across northern NH and the western ME mountains. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM MONDAY/... Fall pattern will keep the area busy with waves passing through into the upcoming week. With short lived ridging weakening, next disturbance with precipitation will arrive Monday. First, Sunday night presents a great opportunity for radiational cooling with nearly calm winds and mostly clear skies. Only downside will be high pressure centered to the south of the CWA, thus not idea conditions. Even still, went a little lower that NBM guidance given these additional factors. Temps may bottom in the upper 20s to around 30 very near the immediate coast, with mid to low 20s elsewhere across the interior and valleys. Good guidance presentation into Monday with the suite of deterministic solutions in line with one another. Temperatures warm nicely ahead of a quick moving longwave trough. This will be moving from the Great Lakes into Monday afternoon. It then attempts to phase with weak low pres exiting the Mid- Atlantic coast. Phase timing is late for our area to benefit w/ greater QPF as the trough remains neutral to positive until reaching the Gulf of Maine. While the passage will bring a period of showers to the region, bigger topic may be the return to breezy conditions Monday. NBM IQR spread is still 10 to 15 mph through the afternoon, likely owing to timing and mixing discrepancies. Won`t stray far from the mean at present time, with afternoon gusts up to 25 mph out of the southeast. Locally stronger gusts to 30 or 35 mph may be possible along the passing cold front in the afternoon. && .LONG TERM /MONDAY NIGHT THROUGH SATURDAY/... Early morning long term update...The 01z NBM has been incorporated into the going forecast and yields no significant change. A short wave trough continues to look like it will pass across the forecast area Monday night with any showers ending early Tuesday morning. Thereafter, fair but quite windy Tuesday. Another short wave trough looks to move through Wed night and Thu but there are varying solutions in terms of amplitude and therefore the track and strength of low pressure. Previously... Key Message: An active and progressive pattern will bring multiple chances of showers through the long term period. Amounts should generally be light. Forecast Details: We start off the long term in southwest flow aloft as a northern stream trough approaches from the west. Monday will be dry during the day with normal to slightly above normal highs for this time of year, mainly in the lower 50s to the lower 60s. That being said, we will see increasing clouds through the day which may keep temperatures in check a little bit. The trough axis approaches Monday evening along with cold front, increasing precipitation chances (50 to 80 percent) through the night. While precipitation will be widespread, the best chances will generally be across the north. However, even here, NBM probabilities only max out in the 20 to 40 percent range for greater than a half inch of liquid precipitation. Some snow will likely mix in over the mountains but any accumulation will be light. Precipitation chances will diminish Tuesday morning as the trough moves out quickly to the east but a few showers may linger through the day, especially across the mountains. Highs will be cooler on Tuesday behind the front, in the mid 30s to the upper 40s in the mountains, and in the 50s over the foothills down to the coast. Westerly winds will also be quite breezy behind the front through the afternoon when we could see some sustained values in the 20 to 25 mph range and gusts to 35 mph. Wednesday continues to look mostly dry during the day as low amplitude ridging moves through the region quickly. Highs will be similar to Tuesday but maybe just a touch warmer. The next trough/front then approaches Wednesday night leading to more precipitation chances. There is currently good agreement in the guidance that a shortwave will move through the region, but the exact track of the low and heavier precipitation remains fairly uncertain. Either way, total amounts also look fairly light with this system with only low to medium probabilities for greater than a half inch of liquid. Most of the precipitation will move out by Thursday morning, but lingering showers will remain possible through the day on Thursday. Finally, another trough approaches later in the day on Friday into Saturday but details regarding scope and timing remain very uncertain this far out. && .AVIATION /12Z SUNDAY THROUGH THURSDAY/... Short Term...VFR today. Not as breezy today with no additional restrictions through Monday morning. SE winds pick up into Mon, with some gusts to 25 kts. Long Term...Areas of MVFR conditions are likely Monday night as showers move across the region. VFR conditions are expected Tuesday and Wednesday. 30 KT SFC wind gusts from the west are possible Tuesday. Another disturbance may approach Wedensday night with similarly lower ceilings and showers. && .MARINE... Short Term...Next impactful weather for the waters will be as a cold front approaches Monday. An SCA will likely be needed for winds initially, with a short period of Gales possible Mon evening into the overnight. Long Term...A disturbance approaches Monday night, leading to increasing wind gusts and building seas through Tuesday night. There may be a break in SCA conditions Wednesday through Wednesday night, but another disturbance crosses, bringing SCA winds and seas back for Thursday. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...None. NH...None. MARINE...None. && $$ NEAR TERM...Cornwell SHORT TERM...Cornwell LONG TERM...Ekster/Hargrove