Area Forecast Discussion
Issued by NWS Portland, ME

Current Version | Previous Version | Text Only | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
-- Highlight Changed Discussion --
-- Discussion containing changed information from previous version are highlighted. --
438 FXUS61 KGYX 140006 AFDGYX Area Forecast Discussion National Weather Service Gray ME 706 PM EST Fri Jan 13 2017 .SYNOPSIS... High pressure will build in from the west tonight and Saturday. A weak cold front will cross the area the area early Sunday, although will not produce more than some clouds and a few flurries in the moutnains. High pressure will build in behind the front Sunday afternoon through Monday. The high pressure shifts east on Tuesday and will allow a southwest flow of warmer air into the region. Weak low pressure crosses the region mid-week with a threat of precipitation. && .NEAR TERM /UNTIL 6 AM SATURDAY MORNING/... 7 pm Update: Winds have been diminishing in the last hour and this trend will continue. Input the latest obs data and made only minor tweaks to temps and winds for the next few hours. Previous forecast looks good. Previous Discussion: Cold air advection well underway on a strong northwest wind. The strongest of the winds are occurring now and will begin to drop off this evening. Will continue with the wind chill advisory although wind chills are marginal with the coldest wind chill affecting terrain above 2000 feet. Expect a generally clear night with some clouds lingering in the mountains. Low temperatures will drop to below zero in the mountains and the single numbers near the coast. && .SHORT TERM /6 AM SATURDAY MORNING THROUGH SATURDAY NIGHT/... High pressure crests overhead Saturday with light winds expected. High temperatures will be below normal with highs in the teens north and 20s south. Sunny skies as models indicate low pressure will remain south of the forecast area Saturday. Clear skies Saturday night and cold but not as cold as tonight. Expect some clouds and snow showers to develop in the mountains as a cold front approaches. && .LONG TERM /SUNDAY THROUGH FRIDAY/... High pressure will build over northern New England by Sunday afternoon, after a secondary cold front crosses the region Sunday morning. Cold air advection and gusty winds will follow the front. A favorable northwesterly direction may allow for a few upslope snow showers over the higher terrain, however moisture will be lacking during this period. The large surface ridge will gradually build south and east off the Mid Atlantic Region Monday. This will allow for a moderation trend in temperatures as a southwest flow develops over the region. By Tuesday, a backdoor front cross through the forecast area as high pressure rebuilds over the Canadian Maritimes. This will put in place a strong frontal boundary over southern New Hampshire as low pressure passes well to our west. Snow and mixed snow and rain will break out Tuesday night. By Wednesday, a strong southwest flow above the surface will gradually warm the column, bringing rain and possibly drizzle to the regionl. A vigorous short wave trough will lead to the development of low pressure along the northern New England coastline Thursday, before exiting into the Canadian Maritimes. There will be little in the way of cold air behind this departing system. && .AVIATION /00Z SATURDAY THROUGH WEDNESDAY/... Short Term...VFR through Saturday night. Long Term...VFR through early Tuesday afternoon. Ceilings then will be lowering with rain and snow entering the region Tuesday night. IFR conditions continuing through Wednesday, with slowly improving conditions on Thursday. && .MARINE... Short Term...Small craft advisory for the coastal waters. Winds will drop off by later tonight. Long Term...NW winds may approach SCA levels briefly Sunday afternoon, but otherwise will remain below criteria through Wednesday. Low pressure will bring gusty winds to the coastal waters on Thursday. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...Wind Chill Advisory until 10 AM EST Saturday for MEZ007>009. NH...Wind Chill Advisory until 10 AM EST Saturday for NHZ001. MARINE...Small Craft Advisory until 6 AM EST Saturday for ANZ150>154. && $$ is the U.S. government's official web portal to all federal, state and local government web resources and services.