Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 210300 AFDGYX Area Forecast Discussion National Weather Service Gray ME 1100 PM EDT Sat Apr 20 2024 .SYNOPSIS... Scattered showers and maybe a rumble of thunder possible late this afternoon and evening with blustery winds. Milder, and dry weather returns through Tuesday...becoming quite dry and gusty on Monday. Low pressure approaches the region toward mid- week, likely bringing the next chance for widespread rain on Wednesday. && .NEAR TERM /UNTIL 6 AM SUNDAY MORNING/...
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1055 PM...Only notable forecast change is to pretty much winds down the POPS by midnight,except for upslope sprinkles or flurries in the mtns until about 06Z. Otherwise should be clearing skies outside the mtns. 750 PM...I`ve adjusted the POPS based on current conds, and removes thunder from the forecast given the loss of heating. The downslope S and E of he mtns is helping squash the showers some, but a few are making it through, and these should go on for the next couple of hours, and maybe until midnight or so in the mtns. Could see a brief bit of gusty winds behind the front , but this shouldn`t last too long, and overnight winds will be generally be light. Previously...A few pop up showers and isolated thunderstorms are expected for late this afternoon and evening, especially across northwestern areas. A shortwave pivots through Quebec over the next few hours, with some gusty showers already showing up across Upstate New York and Vermont. Some pea sized hail is also possible with these with cold air aloft. These showers dissipate as they move eastward through the late evening hours, with mostly dry conditions expected by and after midnight. Cooler and drier air steadily filters in overnight behind today`s passing cold front, with lows cooling into the 20s and 30s across northern New England. Decreasing clouds are expected through the overnight hours.
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&& .SHORT TERM /6 AM SUNDAY MORNING THROUGH MONDAY/... A seasonably cool and mainly dry day is expected tomorrow, with highs in the 50s downwind of the mountains, and 40s through the mountains. The day starts off mostly sunny, but clouds increase through the afternoon hours as another cold front swings through late in the afternoon. This will be a mostly dry front, with just a few showers across the northern mountains. Elsewhere, the passage of the front will mainly only be marked by an increase in clouds and a wind shift. Cooler and drier air spills in behind this front tomorrow night, with lows dipping into the mid 20s across the north, to the mid 30s along the coastline. High pressure steadily builds in behind the front overnight tomorrow night. A northwesterly breeze persists tomorrow night as dry air moves in. Conditions become gustier towards sunrise on Monday. && .LONG TERM /MONDAY NIGHT THROUGH FRIDAY/... Quiet and gusty weather are expected Monday and Tuesday, with gusty WNW flow expected Monday and gusty southwesterly return flow on Tuesday. Both days will feature below normal temperatures but Tuesday will be warmer. Blended MOS with NBM for lows Monday night - it should be quite cold. Tuesday won`t get to it`s full potential temperature-wise, especially on the coastal plain as winds will be onshore during the afternoon. A good portion of the deterministic and ensemble suite show a wetting rain event centered around Wednesday. However, there remains considerable disagreement on amplification of the system, so QPF amounts and rainfall duration are quite uncertain at this time. There could even be some mountain snows with this one. Thereafter, fair but cool weather returns late week. && .AVIATION /03Z SUNDAY THROUGH THURSDAY/... Short Term...Any lingering restrictions with showers and MVFR ceilings lift by late this evening with a return to VFR at most terminals. Some near MVFR ceilings linger at HIE into tomorrow. MVFR ceilings likely return to HIE tomorrow afternoon and night, with VFR prevailing elsewhere. Long Term...Mainly VFR conditions are expected at most terminals Monday through Tuesday. Restrictions are likely on Wednesday as showers and lower ceilings return, with MVFR to IFR conditions likely. Improvement is likely on Thursday, but a return to VFR may take until Thursday night. && .MARINE... Short Term...A cold front crosses the waters through this evening, with a few westerly gusts to near 25 kts overnight. Another front crosses the waters late tomorrow afternoon, with southwesterly winds gusting to near 25kts again, and then shifting to westerly overnight tomorrow night. High pressure begins to build in tomorrow night. Long Term...High pressure builds in Monday with it moving offshore on Tuesday. SCA conditions are possible in northwesterly flow Monday morning. The high moves east of the waters by Tuesday as a cold front approaches from the west, with SCA conditions likely in southwesterly then south flow Tuesday and Wednesday. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...None. NH...None. MARINE...None. && $$ SYNOPSIS... NEAR TERM...Cempa/Clair SHORT TERM...Clair LONG TERM...Ekster AVIATION... MARINE...

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