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. --
000 FXUS61 KGYX 221213 AFDGYX Area Forecast Discussion National Weather Service Gray ME 713 AM EST Tue Jan 22 2019 .SYNOPSIS... High pressure will build in from the west today and will crest over the region by this evening before shifting offshore overnight. Low pressure moving northeast through the Great Lakes will lift a warm front through the region on Wednesday. Low pressure will continue northeast through southern Quebec Wednesday night and will drive a trailing cold front into western New England by Thursday morning. The front will push east through the region on Thursday. A secondary cold front will approach from the northwest Thursday night and will drop south through the region on Friday. Weak low pressure will approach from the west Friday night and will cross the region on Saturday. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... 700 AM Update... quick update to adjust temps/tds across the region. High pressure building in from the west has cleared skies across the region early this morning. Northwest winds remain gusty in locations that didn`t decouple overnight and should remain gusty through the morning hours before dropping off this afternoon. Wind chill advisories remain in effect through 900 AM. No major changes to current forecast planned attm. Prev Disc... High pressure will build in from the west today and will crest over the area by this evening. Gusty northwest winds during the 1st half of the day will gradually subside this afternoon. Wind chill warnings and advisories continue until 900 AM. Looking for mostly sunny skies through mid afternoon before high clouds spill into the region from the west. Return flow will bring somewhat warmer air back into the region with highs ranging through the teens north and lower to mid 20s south. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM WEDNESDAY/... Broad area of weak over-running will edge in from the west overnight as low pressure moves into the southern Great lakes by Wednesday morning. Looking for increasing clouds overnight with a slight chance of snow showers in western zones toward daybreak. Lows overnight will generally range through the single numbers. Low pressure will continue northeast through the Great Lakes on Wednesday lifting a warm front through the region. This will produce a variety of precipitation during the day with rain in southern New hampshire and the coastal plain of Maine. A mix of sleet and snow showers expected farther north in the mountains and foothills. QPF for the day will be on the light side with amounts generally a tenth of an inch or less. An inch or two of snow may accumulate in the far north by late in the day. High temperatures will push above normal in southern zones with highs reaching the mid 30s to lower 40s. Farther north readings will top out in the mid 20s to lower 30s. && .LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/... A surface low moves north from the Great Lakes into southern Canada Wednesday night. A mixed bag a precipitation is likely especially in the foothills and mountains. The main question is how quickly will the cold air get scoured out as the warm front lifts north. Temperatures will fall Wednesday evening with mountain and foothill locations dropping into the mid and upper 20s. Farther south it looks like temperatures should not drop as much. Expect temperatures to initially drop early in the evening but begin to rise by midnight. Most southern location should be above freezing before 12Z Thursday morning. The surface low will trail a cold front that will slow as it approaches the coast. Low pressure will develop on this front and spread heavier rain over the region Thursday. Ingredients are there for 1 to 2 inches of rain along the coastal plain. Both the European model and the GFS are in agreement on this. The front swings off the coast Thursday evening with colder air moving in with the coldest holding off until Saturday. Expect snow showers around through the weekend. Temperatures moderate to near normal levels Sunday and Monday. && .AVIATION /12Z TUESDAY THROUGH SATURDAY/... Short Term...VFR today through tonight. MVFR/IFR ceilings develop on Wednesday mainly during the afternoon and evening. Long Term...Expect IFR conditions Wednesday Night and Thursday. Mostly VFR Friday through Monday. There is a chance of MVFR in possible snow showers through the weekend. && .MARINE... Short Term...Gales and freezing spray advisories continue through noon today. Expect winds to gradually subside this afternoon as high pressure builds in from the west. Long Term...A southerly Gale is possible Wednesday night and Thursday. SCA winds possible behind the cold front Thursday night and Friday. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...Wind Chill Warning until 9 AM EST this morning for MEZ007>009- 012>014. Wind Chill Advisory until 9 AM EST this morning for MEZ018>028. NH...Wind Chill Warning until 9 AM EST this morning for NHZ001>007- 009. Wind Chill Advisory until 9 AM EST this morning for NHZ008- 010>015. MARINE...Small Craft Advisory until noon EST today for ANZ153. Freezing Spray Advisory until noon EST today for ANZ150>154. Gale Warning until noon EST today for ANZ150>152-154. && $$

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