Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 190029 AFDGYX Area Forecast Discussion National Weather Service Gray ME 729 PM EST Sat Feb 18 2017 .SYNOPSIS... A warm front will push further northwards this evening and will be followed by a secondary cold front on Sunday. High pressure will build in from the west on Monday and will crest over the area on Tuesday before shifting offshore. Warmer weather will continue through the week with no large storm systems on the horizon. && .NEAR TERM /UNTIL 6 AM SUNDAY MORNING/...
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Update... Continue to monitor for the possibility of potential late night fog tonight as surface dew points will be on the increase over our large snow cover. Fog has already formed at KHIE this hour. Have adjusted temperatures and dew points based on current conditions. Expect there are some slick sidewalks tonight due to a refreeze. Have placed this on social media. Band of high cloudiness will soon exit far southern areas during the next couple. Otherwise, little in the way of forecast changes to this package. Prev Disc... Skies have cleared today as warm southwesterly flow moves in behind a warm front. Winds have increased with gusts to around 20mph across the south. Overnight temperatures will be mild as the warm air remains in place. Increasing dewpoints across the southern plains with warm air over the cold snowpack may create some pockets of fog. Further north, drier air remains and so fog is less likely.
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&& .SHORT TERM /6 AM SUNDAY MORNING THROUGH SUNDAY NIGHT/... Sunday will start off mostly sunny with a cold front approaching from southern Quebec. Ahead of the front however the clear skies and warm airmass will allow temperatures to soar to the mid to upper 40s south and mid 30s north. This front will push through the region in the afternoon with temperatures dropping overnight. With the switch to northwesterly flow once again the northern mountains will see some cloudiness and upslope snow showers develop overnight. && .LONG TERM /MONDAY THROUGH SATURDAY/... The beginning of the work week will be sunny and precipitation free. As low pressure pulls east, a narrow ridge of high pressure will build in from the west. Clouds will be on the increase Tuesday evening with a northern stream short wave trough approaching. This will bring widely scattered showers with snow in the mountains and rain more likely south depending on the time of day. QPF amounts will be light so either way not expecting accumulations more than a few hundredths. Additional light upslope showers will be possible Thursday and Friday for northern sections. A southern stream short wave will attempt to phase with a northern low early Saturday as it swings through the Great Lakes and towards New England. This system will be deeper and closer than the mid week system with northern New England in the warm sector during the day Saturday followed by a trough/cool front a few hours later. This will deliver more widespread snow and rain showers before it shifts east Sunday. Temperatures will be above normal each day with widespread 40s beginning Wednesday and lasting through next weekend. Readings will even approach or surpass 50 degrees in favored warm spots across southern NH and SW Maine including Nashua, Manchester, and Portsmouth a few times this week. && .AVIATION /01Z SUNDAY THROUGH THURSDAY/... Short Term...VFR this afternoon into tonight. Patchy fog is possible with the warmer temperatures moving over the cold snowpack overnight especially in the south where dewpoints are higher. VFR Sunday with areas of MVFR ceilings in the mountains. Long Term...Mainly VFR through the period. However, MVFR conditions in light precipitation is possible later Tuesday night and Wednesday at all terminals. && .MARINE...
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Short Term...Southwest flow to continue behind a passing warm front leaving marginal small craft conditions. Expect winds to peak in the next few hours before decreasing again overnight. However, seas stay up over much of the outer waters. Long Term...Marginal SCA conditions are possible Monday into Tuesday over the outer waters.
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&& .GYX WATCHES/WARNINGS/ADVISORIES... ME...None. NH...None. MARINE...Small Craft Advisory until 5 AM EST Sunday for ANZ150-152-154. && $$ NEAR TERM...Cannon SHORT TERM...Cannon LONG TERM...Cannon is the U.S. government's official web portal to all federal, state and local government web resources and services.