Area Forecast Discussion
Issued by NWS Portland, ME
Issued by NWS Portland, ME
211 FXUS61 KGYX 231735 AFDGYX Area Forecast Discussion National Weather Service Gray ME 1235 PM EST Sun Nov 23 2025 .SYNOPSIS... A upper level disturbance will bring periods of snow showers this evening into tonight. High pressure builds in Monday for mostly dry weather into Tuesday Morning. A warm front will bring chances for rain late Tuesday into Tuesday night with a wintry mix possible across the mountains and north. Temperatures rise well above normal Wednesday followed by a cold front crossing Thursday morning with cooler and breezy conditions to end the week. && .NEAR TERM /THROUGH TONIGHT/... Water vapor imagery shows a weak short wave dropping southeast across Upstate NY. This short wave will slide across southern New England tonight spreading some snow showers across New Hampshire into far western Maine this evening. Latest radar does show some weak returns over the NH as of this writing, but with dew point depressions greater than 10F this activity is not yet reaching the ground. Across central and southern NH precipitation may start as rain before wet bulbing allows for a switch to snow. Any snow accumulation is expected to be less than an inch while a coating of snow will be enough slicken up surfaces this evening. Chances for snow showers will diminish overnight as the short wave moves offshore. Lows tonight will mainly be in the 20s. && .SHORT TERM /MONDAY THROUGH MONDAY NIGHT/... High pressure will build in from the southwest Monday and will crest over southern New England Monday night. Skies will turn mostly sunny south of the mountains with breezy northwest winds gusting up to 25 mph before the high moves closer overhead. Highs on Monday will range from the 30s north to 40s south. Return flow around the high will bring increasing high clouds late Monday night while the forecast area will remain dry. Lows Monday night will again be mainly in the 20s. && .LONG TERM /TUESDAY THROUGH SUNDAY/... Overview... High pressure moves off the East Coast on Tuesday, then a weak low pressure center and a cold front move through Wednesday and Wednesday night. Colder air returns behind the front for late in the week and into the weekend as a trough digs into the Great Lakes. Details... Temps moderate a bit on Tuesday as high pressure moves off the Eastern Seaboard. Highs warm into the 40s across most of the area, with some low 50s along the coastline. At the same time, clouds steadily increase and thicken through the day as an area of low pressure approaches from the west. This system takes its sweet time moving through New England. The parent low deepens across the Great Lakes Tuesday night, with showery precip arriving into New England Tuesday night along the warm front ahead of the system. With some cooler air in place, a period of light snow and mixed precip is likely across the higher terrain and northern spots. Mainly rain is expected elsewhere. Wednesday is spent in the warm sector of the system, with some showers possible and warmer temperatures. Highs likely push into mid to upper 50s across southern New Hampshire and the coastline with some breaks of sunshine. Inland and further north, it will likely take most of the day to break out of the low overcast and lingering CAD in place, with highs not reaching the 40s until late in the day. A weak triple point low develops along the front across New England Wednesday night, bringing another round of more organized shower activity. The front clears the area by Thursday morning, with an increasing westerly breeze and drying conditions for Thanksgiving day. Temps mostly hold in the 40s for the daytime, with 30s across the north, before quickly dropping during the late afternoon and evening hours. The parent low in the Great Lakes passes well north of New England Thursday night. In it`s wake, windy and colder conditions move in for Friday and Saturday. Highs in the 20s are expected across the north, with 30s downwind of the mountains. Scattered upslope snow showers are likely behind the front for Friday and Saturday. && .AVIATION /18Z SUNDAY THROUGH FRIDAY/... Short Term...Scattered snow showers overspread NH between 21Z and 00Z that will likely bring conditions to around MVFR thresholds at times. Maine TAF sites likely remain VFR tonight. VFR likely prevails Monday through Monday night. Long Term...VFR prevail on Tuesday. Ceilings lower and showers arrive Tuesday night, with IFR conditions likely. Ceilings likely improve to MVFR across at least southern terminals on Wednesday with scattered showers. MVFR to IFR is likely Wednesday night into Thursday. VFR likely returns to most terminals on Thursday and prevails into the weekend, except at HIE and LEB where MVFR ceilings in upslope flow is more likely. && .MARINE... Short Term...SW flow shifts out of the NW tonight as a weak disturbance crosses the waters. Winds and seas will remain below SCA thresholds through Monday night, although some gusts to 20 kts are possible during the day Monday. Long Term...A warm front crosses the waters Tuesday night, with a brief period of SCA conditions possible in southwest flow on Tuesday. Fog is possible on Wednesday, then a cold front crosses the waters Wednesday night. Westerly gales are possible starting Thursday and lingering into Saturday. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...None. NH...None. MARINE...None. && $$ NEAR TERM...Schroeter SHORT TERM...Schroeter LONG TERM...Clair