Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 241638 AFDGYX Area Forecast Discussion National Weather Service Gray ME 1238 PM EDT Sat Mar 24 2018 .SYNOPSIS... A trough of low pressure will drop southwest through the region today and will push into southern New England overnight. High pressure will build over the region Sunday through Monday and will hold over the area on Tuesday. A cold front front will slowly approach from the west Wednesday and will stall over the area on Thursday. Low pressure will slowly track northeast along the front Thursday night and Friday. && .NEAR TERM /UNTIL 6 PM THIS EVENING/...
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1235 pm Update: Scattered light showers have been developing over NH and southwest ME so have updated forecast to reflect these scattered showers that will continue to develop through the afternoon. Raised max temps by just a few degreees. 930 am Update: Minor tweaks to mid morning temps based on latest obs data otherwise no changes needed to forecast at this time. 700 AM Update... Quick update to adjust morning temps/td`s. Temperatures showed little change overnight as cloud cover/winds held readings above freezing in many southern locations. Any sunny breaks this morning will give way to thickening clouds toward afternoon. No major changes planned to current forecast. Prev Disc... Shortwave digging into the northeast will bring thickening clouds today as an inverted trough drops southwest through the region. After a few sunny breaks this morning expect lowering and thickening clouds with snow showers breaking out in northern and eastern zones during the late morning and early afternoon. This activity will spread southwest through early evening. With highs in the 30s to lower 40s not looking for much impact on area roads but some areas could pick up an inch or so of wet snow in more persistent snow showers. Southern and coastal areas may see a mix of rain and snow showers.
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&& .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SUNDAY/... Snow showers or mixed precipitation will gradually end from north to south Saturday night as the trough axis settles into southern New England. High pressure building south from Canada will bring partial clearing in northern zones after midnight. Lows will range from the mid teens to mid 20s north and mid 20s to near 30 south. High pressure will continue to build in from the north on Sunday although moist easterly flow off the maritimes will keep some degree of clouds in the forecast for a majority of the day with clearing late. Highs on Sunday will range through the 30s to near 40. && .LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/... High pressure will build into the forecast area from the north Sunday night through Tuesday with fair weather expected. Temperatures are also expected to modify as we head toward midweek. A short wave trough is expected to approach on Wednesday but weaken with time. There may be a rain showers Wednesday afternoon and evening, but should be light. Temperatures will continue warming as well. The next potential precipitation maker is generally agreed upon by the 00z deterministic models and several ensemble members to affect the region centered around Friday. At this time, it looks warm - so mainly rain is expected at this point. && .AVIATION /18Z SATURDAY THROUGH THURSDAY/... Short Term...VFR this morning with areas of MVFR/IFR ceilings and vsby developing this afternoon and evening. MVFR/IFR ceilings and vsby in areas of snow showers this evening....then VFR with areas of MVFR ceilings into Sunday. Long Term...Mainly VFR conditions are expected Sunday night through Tuesday, with some MVFR conditions possible Wednesday in rain showers. && .MARINE... Short Term...Northeasterly gradient will tighten up this evening as a surface trough passes. Have issued SCA`s for the overnight through Sunday. Long Term...SCA conditions likely persist through Sunday night before winds diminish. However, seas may remain at or above 5 feet through midweek as a large ocean storm well offshore pushes swells our way. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...None. NH...None. MARINE...Small Craft Advisory from 10 PM this evening to 8 PM EDT Sunday for ANZ150>154. && $$ is the U.S. government's official web portal to all federal, state and local government web resources and services.