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 121211 AFDGYX Area Forecast Discussion National Weather Service Gray ME 811 AM EDT Thu Oct 12 2017 .SYNOPSIS... High pressure will build over the region today and will shift east on Friday. A cold front will approach from the west Friday night and will drop south into northern New England on Saturday. The front will lift north as a warm front Saturday night. Low pressure will track east through southern Canada on Sunday and will drive a trailing cold front through the region Sunday night. High pressure will build in from the west on Monday and will shift offshore on Tuesday. && .NEAR TERM /UNTIL 6 PM THIS EVENING/...
-- Changed Discussion --
812 AM Update... Have updated the forecast as the frost advisories have expired. Skies are clearing slightly ahead of schedule with most of the cloud cover currently pushing south of the forecast area. Have adjust sky grids based on current sat pics. Should see sunny skies for the remaindder of the day as high pressure continues to build over the area. Aside from a few temp/td tweaks no other changes planned attm. Prev Disc... High pressure building south from Canada gradually eroding low level moisture and lingering showers across southern New Hampshire early this morning. Variable high clouds prevail over the remainder of the forecast area. Expect this trend to continue through daybreak as high pressure continues to build south. High clouds will likely take most of the morning to clear southern zones but by early afternoon most areas should be mostly sunny. Much cooler air filtering south will likely result in patchy frost early this morning. Fryeburg already at 32 degrees so will be keeping frost advisories in place for portions of southern Maine and central New Hampshire. High temperatures today will range from the mid 50s north to near 60 in the south.
-- End Changed Discussion --
&& .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM FRIDAY/... High pressure will continue to build over the region tonight and will shift off to the east on Friday. Should see a clear and frosty night with lows ranging through the 20s in the north and lower to mid 30s in the south. Friday looking sunny with seasonable temps. Highs will range from the upper 50s to mid 60s. && .LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/... The return southwest flow on the back side of high pressure off the coast will bring warming temperatures and increasing humidity to the region Saturday and Sunday as a front approaches from the northwest Friday night, stalls over the region Saturday, and then moves north as a warm front Sunday. This frontal boundary will be the focus for clouds and possible showers, although any showers are expected to be fairly light. With the warm front moving northward Sunday, temps will reach the 70s across southern areas with dew points in the mid 60s. Low pressure moving through southern Canada will drag a cold front across the region Sunday night with the greatest threat for shower activity across mountain areas with a somewhat lesser threat in coastal areas. A large area of high pressure with significantly cooler temperatures will build into the region Monday and continue to dominate the weather with mostly sunny skies and seasonable temperatures for much of the upcoming week. Models are in fairly good agreement although the GFS is faster with the cold frontal passage Sunday night. && .AVIATION /12Z THURSDAY THROUGH MONDAY/... Short Term...VFR today through Friday with IFR/LIFR ceilings/vsby in morning valley fog. Long Term... MVFR conditions possible in widely scattered mountain showers Saturday into Sunday with mainly VFR conditions expected across southern areas. MVFR to IFR conditions associated with a cold front in the mountains late Sunday will move southeast to the coast overnight Sunday night. VFR conditions expected Monday...except in the mountains where MVFR conditions possible. .MARINE... Short Term...no flags. Long Term...SCAs likely Sunday and Sunday night in southwest flow ahead of a cold front. SCAs possible well offshore Monday in the northwest flow behind front. && .GYX WATCHES/WARNINGS/ADVISORIES...
-- Changed Discussion --
ME...None. NH...None. MARINE...None.
-- End Changed Discussion --
&& $$ NEAR/SHORT TERM...Cannon LONG TERM...Marine

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