Area Forecast Discussion
Issued by NWS Caribou, ME

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408 FXUS61 KCAR 272209 AFDCAR Area Forecast Discussion National Weather Service Caribou ME 609 PM EDT Sat May 27 2017 .SYNOPSIS... High pressure will slide south of the region tonight. A cold front will move into the area Sunday and stall. The front will return northward Monday as a warm front. && .NEAR TERM /THROUGH SUNDAY/... 6:09 PM Update...Latest satellite pictures show mid and high level clouds across eastern Maine with more clearing to the west. The clouds will move out of the eastern zones this evening, but clouds moving across central Quebec will begin to advance toward the region later tonight. Will make some tweaks to the sky grids this evening based on the latest satellite pictures. Other changes are minor and mostly based on the latest observations. Previous discussion... Low pressure is currently moving east of the region as high pressure builds in. The high will move southeast into the Atlantic Sunday as a cold front approaches from the west. This will cause clouds to build across the north in the afternoon. && .SHORT TERM /SUNDAY NIGHT THROUGH TUESDAY/... Cdfnt wl hv stalled out at the beginning of the short term pd acrs cntrl sxns. May see lingering showers mainly from the Central Highlands and north as it lifts back to the north as southerly flow increases ahd of lopres center deepening in the Great Lks. At this point thunder chcs look vry meager and wl just keep shower mention along bndry. H5 ridge progged to be acrs the CWA on Memorial Day. Outside of mocldy skies and cool temps may not see much in the way of rain on Monday as guidance conts build H5 ridge drg the aftn. By 00z Tue ridging begins to break down as H5 low digs thru Ontario with lead s/wv and waa along wmfnt resulting in lgt rain. Temps wl not be warm on Monday under cldy skies with H8 temps only ranging fm +3 to +6C, much lower than Sun. This wl result in temps running 5-8 degrees blo normal for most of the area with low 50s along the coast in onshore flow. Expect a showery/drizzly day in the wake of wmfnt lifting thru Mon night. Showers expected right along the front thru 12z Tue with drizzle and fog in its wake drg the day Tue. However hv just indicated showers drg the day which can be refined as we get closer to this timeframe. Maxes wl be svrl degrees warmer compared to Mon but still well blo normal. && .LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/... Upr low closed off ovr Canada wl cont to fling wvs at CWA thru the end of the week. Best chc for showers appears to be drg the day in diurnal htg and hv tried to indicate as much. Med range guidance struggling on when low wl kick out into the Maritimes with latest EC indicating Sat while GEM is showing Sun night and GFS the compromise. Either way a typical start to June for the area. && .AVIATION /22Z SATURDAY THROUGH THURSDAY/... NEAR TERM: Expect VFR conditions next 24 hours. SHORT TERM: VFR on Sunday lowering to MVFR Sun night across northern terminals with possible IFR for BGR and BHB. Expect a very brief period of VFR for southern terminals on Monday before quickly lowering to IFR again Mon night. Will likely see low MVFR/IFR restrictions all terminals into Wed morning before becoming VFR during the day. && .MARINE... NEAR TERM: Have used the NAM to populate wind grids. For Waves: Expect southerly swell to be the primary wave system through the day Sunday (3-4 feet/10 seconds). Winds will be light so no significant wind wave system is expected. Will use the Nearshore prediction system for waves. SHORT TERM: Winds and seas continue to remain below SCA levels through the middle part of the week. Seas expected to run between 2-4 feet. Areas of fog will form over the waters Mon night . && .CAR WATCHES/WARNINGS/ADVISORIES... ME...None. MARINE...None. && $$ Near Term...CB/Mignone Short Term...Farrar Long Term...Farrar Aviation...CB/Mignone/Farrar Marine...CB/Mignone/Farrar is the U.S. government's official web portal to all federal, state and local government web resources and services.