958 FXUS61 KGYX 011931 AFDGYX Area Forecast Discussion National Weather Service Gray ME 331 PM EDT Sun Jun 1 2025 .SYNOPSIS... Winds ease this evening and tonight with scattered showers lingering in the mountains. A few showers last into Monday, but afterward we start to dry out with a significant warm up heading toward the middle of the week. A frontal boundary then approaches from the west bringing increasing rain chances from Thursday into the first part of the upcoming weekend. && .NEAR TERM /UNTIL 6 AM MONDAY MORNING/... Cumulus clouds continue to grow but flatten as dry air prevents much vertical growth this afternoon. Showers to the west have been easily dispersed by the Green Mtns, with just enough downslope to knock down any deeper cu. Have kept light shower chances in through mid afternoon as daytime heating continues. Much of the cloud cover we see during the day should dissipate through the evening with the loss of daytime insolation. Cirrus is lacking from this system, and think points south and east of the mountains/foothills could see a mostly clear evening through midnight. Clouds may begin to spill further SE than the foothills before daybreak Monday. Just a light breeze keeps areas from seeing overnight fog or frost development with lows in the mid 40s. What falls as rain showers for the mountains and foothills overnight and early Mon morning likely falls as snow for the higher summits of the Whites. Light accumulations will be possible. && .SHORT TERM /6 AM MONDAY MORNING THROUGH MONDAY NIGHT/... Light showers will be ongoing across the north Monday morning. It is likely these pull north and east without rain chances reaching the interior and coast, but can`t rule out a few sprinkles through the afternoon. This is amid brief periods of deeper moisture in sharpening upper trough. Expect clouds to linger through the afternoon, but could thin as NW flow aloft brings drier air. Westerly winds at the surface will aid in advecting warmer temps into the forecast area, but a push into the upper 60s to around 70 will depend on additional afternoon sun. Overnight, decoupling appears likely as clouds dissipate and sfc winds become light. Radiational cooling should bring a cooler night with more widespread low to mid 40s. In the northern valleys, mid to upper 30s may be attainable, with sheltered low spots seeing patchy frost. && .LONG TERM /TUESDAY THROUGH SUNDAY/... A 500-mb ridge builds into New England Tuesday and Wednesday with plenty of subsidence and dry air to provide a couple of sunny days. It will also get continuously warmer...with good mixing and temperatures aloft to support temps well in the 70s to low 80s on Tuesday and then mostly in the 80s on Wednesday (away from the coast)...with 90 degrees not out of the question in a few areas as temperatures can over-perform when the airmass is very dry. Thursday`s temperatures may be similar to those of Wednesday, but there will be more cloud cover as the ridge breaks down and moisture increases ahead of a cold front. With the loss of subsidence from the ridge and gained lift from the approaching front, we`ll see increasing chances for showers in the afternoon and evening with a few storms also possible. There could be some pretty hefty rain rates with PWATS increasing with the GFS in particular advertising above 1.50", which is above the 90th percentile for early June. Models are hinting at a break in the precip Thursday night into Friday morning, but there may be fog or low stratus with the increasing low-level moisture. Precipitation chances then ramp back up Friday into Saturday as Thursday`s front looks to get hung up somewhere across the region or even lift back northward with multiple waves of low pressure riding along it. Even though this is a ways out and there are other factors at play (like where the front sets up, etc), will have to watch for heavy rainfall potential Friday and Saturday with ensembles from the GFS and ECMWF showing 30-50% probabilities of PWATS over 1.50", which would again be above the 90th percentile for this time of year. There`s a signal within the ensemble guidance for a drying trend going into Sunday with an upper trough swinging through and pushing the frontal boundary off to the south and east. && .AVIATION /19Z SUNDAY THROUGH FRIDAY/... Short Term...Daytime W gusts subside this evening, but winds remain 5 to 8 kts overnight. Conditions remain VFR with the loss of daytime cumulus field. Exception may be points towards the mountains where MVFR ceilings persist with overnight SHRA. This is likely to continue into Monday as well. Additional cumulus field develops Monday for much of southern ME and NH, but not as breezy. Long Term...VFR prevails Tuesday through Wednesday night. Showers likely return Thursday and Friday, and it looks like there could be a few storms as well. Aside from restrictions from showers/storms, IFR restrictions from fog and/or low stratus are possible Thursday night into Friday morning. && .MARINE... Short Term...SW winds become southerly Monday as upper low moves north and high pressure drifts to the south. This will allow wave heights to decrease late tonight and Monday morning, with sub-SCA levels through Monday night. Long Term...Conditions expected to remain mostly below SCA levels through this week. High pressure centered east of the waters will promote southerly flow through Wednesday. A cold front then approaches Thursday and looks to stall out in the vicinity of the waters into the weekend. It`s possible winds may increase to SCA levels at times late week into the weekend as waves of low pressure pass long the frontal boundary. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...High Surf Advisory until 8 PM EDT this evening for MEZ023>028. NH...None. MARINE...Small Craft Advisory until 11 AM EDT Monday for ANZ150-152. Small Craft Advisory until 11 PM EDT this evening for ANZ151- 153-154. && $$ NEAR TERM...Cornwell SHORT TERM...Cornwell LONG TERM...Combs