Area Forecast Discussion
Issued by NWS Portland, ME

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary On
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. --
000 FXUS61 KGYX 211001 AFDGYX Area Forecast Discussion National Weather Service Gray ME 601 AM EDT Tue Mar 21 2017 .SYNOPSIS... A cold front will approach from the northwest early on today and will drop south through the region during the day. A secondary arctic front will push south through the region Tonight. High pressure will gradually build in from the west Wednesday through Thursday with colder than normal temperatures. High pressure will shift offshore Thursday night. A cold front will approach from the northwest on Friday and will push south through the region Friday night. High pressure will build in from the north Saturday but a warm front looks to approach Sunday. && .NEAR TERM /UNTIL 6 PM THIS EVENING/...
-- Changed Discussion --
600 AM...Minor ESTF update to reflect current satellite trends and mesonet in near term grids. Prev Disc... A shield of mid level clouds will continue to push overhead early this morning in advance of a short wave trough and sfc front. The front will be pretty moisture-starved, but a little light precipitation will be possible across the interior today. Overall, temperatures will be warmer than normal, with some areas in the south expected to reach the 50 degree mark once again.
-- End Changed Discussion --
&& .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM WEDNESDAY/... A stronger cold front will cross the region tonight. This front will be the leading edge of an arctic air mass which may be accompanied by a band of snow squalls. At the very least, we expect snow showers in the mountains. Temperatures will be fairly mild this evening, but then drop quickly overnight as the arctic air rushes in from the west. Wind gusts will likely pick up behind the front as well, with gusts up to 30 mph not out of the question late. Cold northwest flow will be the theme on Wednesday with temperatures well below normal with winds gusting around 35 mph in the CAA regime. Low probability for low-end wind advisory for portions of the CWA. Upslope snow showers in the mountains will be prevalent. && .LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/... The models are in decent agreement on the longwave pattern through early next week. We begin the period with the upper trough axis over northern New England along with the coldest air of the work week. Fortunately...the trough will lift out during the day on Thursday with rising heights and moderating 850 millibar temperatures as ridging takes hold across the region. The center of the surface high will build by to our south late Thursday before slipping offshore. By Friday...a broad upper ridge will be centered across the southeast CONUS with warm frontal clouds spreading northward into the region along with an increasing chance for precipitation. A compromise of the various medium range solutions continues to suggest the frontal boundary will get hung up across the region for much of the weekend...resulting in a prolonged period of unsettled weather. There is some hope that high pressure building by to our north over Quebec province will nose into the area for Sunday...with clearing skies over much of the area with the exception of far southern New Hampshire and southwest Maine. In the dailies...High pressure will build east and crest across the region on Thursday before retreating offshore to our south by early Friday. A warm front will move north into the region late Friday and Saturday then likely stall...resulting in unsettled weather for much of the upcoming weekend. && .AVIATION /10Z TUESDAY THROUGH SATURDAY/... Short Term...A period of MVFR cigs will be likely this afternoon as a cold front moves across the region. VFR conditions will be prevalent at most terminals this morning. VFR conditions will return tonight, but a period of snow showers is expected in the mountains, with the potential for a few snow squalls. VFR conditions are expected outside of the White Mountains on Wednesday, but windy conditions, with peak gusts around 35 kt are likely during the day. Long Term... Fri PM -Sat..Areas of MVFR psb in -shra/-shsn. && .MARINE... Short Term...Seas will gradually subside today as long period swells diminish. A strong cold front is expected to cross the waters tonight which should allow for northwesterly gales Wednesday and Wednesday night. Gale warnings are in effect for all waters except for Casco Bay where a Gale watch remains in effect. Long Term... Thu AM...Small Crafts are likely, with winds approaching Gale outside the bays. Fri...Small Crafts are likely, with winds approaching Gale outside the bays. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...None. NH...None. MARINE...Gale Watch from Wednesday morning through Wednesday evening for ANZ153. Gale Warning from 8 AM Wednesday to 8 AM EDT Thursday for ANZ150>152-154. && $$ SYNOPSIS... NEAR TERM...Ekster SHORT TERM...Ekster LONG TERM...Schwibs AVIATION... MARINE...

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.