Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 222307 AFDGYX Area Forecast Discussion National Weather Service Gray ME 707 PM EDT Wed Mar 22 2017 .SYNOPSIS... The passage of an arctic front will allow for cold temperatures to continue through Thursday. A warm front will move in from the west on Friday with some light snow and rain ahead of it. Another cold front will drop down from the north on Saturday with more cold air expected for Sunday and Monday. Low pressure tracking south of New England on Monday could bring some light snow or a wintry mix of precipitation Monday into Monday night. Another low pressure system will track through New England on Wednesday with another chance of wintry precipitation. && .NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
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705 PM Update...Winds continue to be the story early this evening as well as the cold air. Peak gusts as of 23z show values still around 40 kt at times, so will continue the wind advisory. Wind gusts should come down some over the next hour or two due to the loss of daytime heating and mixing. Therefore, we may be able to cancel the advisory early. Previously... High pressure building in from the west tonight will maintain a tight northwesterly gradient across the region. Wind gusts of 40 to 50 mph can be expected into the evening hours before winds diminish somewhat later this evening. Will be continuing wind advisories through midnight. Lingering diurnal clouds in the mountains should dry up this evening. Have gone several degrees below guidance for overnight lows due to the unusually cold airmass for this time of year. Looking for lows of 5 below to 5 above north with readings bottoming out in the single numbers south.
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&& .SHORT TERM /6 AM THURSDAY MORNING THROUGH THURSDAY NIGHT/... Sunny but unseasonably cold weather continues on Thursday as high pressure crests over the region. Expect gusty winds in the morning to gradually drop off in the afternoon. Highs will top out at 15 to 25 north and in the mid 20s to near 30 south. High pressure will shift offshore Thursday night and a broad area of weak over-running will shift in from the west. Looking for increasing clouds overnight with a chance of snow showers pushing into western zones by daybreak. Expect any precip to be light and spotty. Lows overnight will range from 5 to 15 north and will range through the teens to near 20 south. && .LONG TERM /FRIDAY THROUGH WEDNESDAY/... Active winter pattern will continue into next week. Models continue to diverge somewhat as to the strength and frequency of approaching systems. Models are in relatively good agreement with a strong warm air advection pattern on Friday as a southwesterly flow develops. Radiational cooling will have already occurred during the morning hours, so boundary layer temperatures will remain cool throughout much of the day. As the precipitation crosses the region, central areas have a potential for a light mix of sleet and freezing rain to be combined with the snow despite it being so late in the season. Some snow will accumulate in the north, with a possible changeover to rain over southern locations during the afternoon. Another very cold airmass builds southeastward from Canada on Saturday. This will not be as cold as our most recent airmass as the core of the coldest air remains locked up in Canada. Nevertheless, the persistent presence of the surface high over the weekend will divert the next approaching system to our south early next week. By Monday, low pressure may be crossing through the Gulf of Maine, leaving a mixture of snow to rain from north to south. The Euro model is slower with the passage of this system. Yet another system will cross the region late Tuesday into Wednesday. This will be followed by another blast of cold air and plenty of snow showers late in the week. && .AVIATION /23Z WEDNESDAY THROUGH MONDAY/... Short Term...VFR tonight through Thursday night. Long Term...Areas of MVFR and IFR conditions developing Friday ahead of a warm front and again on Monday with low pressure passing south of the region. Mixed precipitation will be possible with these two events. Yes another mixed precipitation event is possible Tuesday night into Wednesday, lowering the visibilities and ceilings. && .MARINE... Short Term...Continuing Gales through midnight. Long Term...Gusty winds expected over the waters Friday from the southwest. Winds may possibly approach gale force for a few hours. SCAs are possible on Monday with a northeast wind developing ahead of low pressure. Gales are possible on Wednesday. && .GYX WATCHES/WARNINGS/ADVISORIES...
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ME...Wind Advisory until midnight EDT tonight for MEZ012>014- 018>028. NH...Wind Advisory until midnight EDT tonight for NHZ004-006- 008>010-012>015. MARINE...Freezing Spray Advisory until 10 AM EDT Thursday for ANZ150>154. Gale Warning until midnight EDT tonight for ANZ153. Gale Warning until 8 AM EDT Thursday for ANZ150>152-154.
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&& $$ NEAR TERM UPDATE...MLE

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