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Marine Weather and Tides Greenville, ME Version 3.4

NOTICE 3/30/2021 -- ANZ330 has been split into ANZ331 and ANZ332. Click EDIT in Marine Forecast and select your new zone. 1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17. 1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

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Sunrise 6:14AM

Sunset 6:45PM

Thursday September 16, 2021 3:17 PM EDT (19:17 UTC)

Moonrise 5:08PM

Moonset 12:48AM

Illumination 77%

NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.

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7 Day Forecast for Marine Location Near Greenville, ME

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Area Discussion for - Caribou, ME

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FXUS61 KCAR 161903 AFDCAR

Area Forecast Discussion National Weather Service Caribou ME 303 PM EDT Thu Sep 16 2021

SYNOPSIS. High pressure will continue tonight, moving east of the area on Friday. Another cold front will approach late on Sat and cross Sat night followed by Canadian high pressure for Sunday and Monday.

NEAR TERM /THROUGH FRIDAY/. High pressure continues to keep skies mostly clear and winds light across the forecast area this evening. Quiet weather will continue into the overnight, however the current pattern is perfect for radiational cooling and fog development, especially along the coast and in river valleys where moisture is even more abundant. Low temperatures tonight will fall into the upper 40s across the north, and into the lower 50s Downeast.

Another quiet weather day is in store on Friday. Fog will dissipate just past sunrise as diurnal mixing picks back up. Winds will be slightly breezier Friday afternoon due to the increased mixing heights and a stronger pressure gradient as the high pressure begins to slide off to the east. High temperatures will be above average, reaching into the low to mid-70s across the forecast area.

SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY/. Friday Night . Onshore flow ahead of an approaching cold will lead to widespread low clouds as well as some fog, especially Downeast. Expect fog and low clouds to advect north through the night. Milder with lows mainly in the low 60s. Could be some drizzle with the low cloud deck, especially Downeast. Went warmer than most guidance for low temps and higher than most guidance for sky cover, which are typically model errors when there is high confidence in a marine layer at night.

Saturday/Saturday Night . Cold front moves SE into Northern Maine with showers ahead of the front, along with possible storms. Not expecting the storms to be strong or severe, as shear and instability aren't that impressive. Best chance of showers and storms in is the north midday to mid afternoon, with the best chances then moving SE to the rest of the area late afternoon and evening as the front progresses SE. Some of the activity may weaken a bit in the evening along the front, though, as we lose the daytime heating. Warm and muggy Saturday with low to mid 70s, but not as warm as it could be due to limited clearing of the marine layer ahead of the front. Front moves offshore Saturday night with drying from north to south from late afternoon through the overnight hours, and a wind shift to the north. Models overall are in pretty good agreement on the timing of the front and amount of shower/storm activity just ahead of the front.

Sunday . Very nice day Sunday with drier air behind the cold front and sunny skies. Airmass behind the front isn't exactly cool, with highs ranging from the mid/upper 60s north to low 70s Downeast. A bit of a north breeze, but overall a really nice day to get outside.

LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/. High confidence in strong ridging aloft developing Monday and persisting into Wednesday. Ensemble clusters all show similar magnitude of ridging aloft, leading to the high confidence. Due to this, and the strong subsidence leading to little cloud cover and no convection, kept with previous forecast's tendency to go a bit warmer than most model guidance for high temps. Think that especially on Tuesday, some places will hit 80. Toward Wednesday night and Thursday, the ridge appears to finally break down with some shower chances returning, though there is a good amount of uncertainty on just when it breaks down.

AVIATION /18Z THURSDAY THROUGH TUESDAY/. NEAR TERM: VFR remains this evening under mostly clear skies. Patchy fog will develop tonight, especially along the coast and in river valleys. KBGR/KBHB are most likely to be affected by reduced visibilities, but northern terminals may see brief periods of IFR due to fog as well. Fog will clear Friday morning past sunrise, and VFR conditions will return to all terminals. Light winds will shift S tonight into Friday morning.

SHORT TERM: Friday Night . High confidence in very low ceilings <500 feet AGL beginning Downeast in the evening and spreading north through the night. Some visibility reduction in fog likely, especially Downeast. South breeze.

Saturday . Conditions improving to MVFR most areas by about midday. Some potential for patchy VFR in the afternoon, but most places should stay MVFR. Some showers and storms in the afternoon and evening hours. South breeze becoming north late in the day in the north behind a cold front.

Saturday Night . Breeze becoming north behind a cold front, with any remaining MVFR/IFR ahead of the front improving to VFR once the front moves through.

Sunday . N breeze and VFR.

Sunday Night through Tuesday . VFR with light wind.

MARINE. NEAR TERM: Winds and seas will remain below SCA conditions through Friday. Patchy fog will develop tonight and may linger over the coastal waters on Friday.

SHORT TERM: Easily below small craft Friday night and Saturday, though fog could reduce visibility over the waters. Saturday night into Sunday, north wind could increase to close to small craft levels. Also, we should get a bit of a long period swell from a low pressure passing south of the waters. Don't anticipate reaching high surf advisory criteria, but close enough to keep watching. Sunday night through Tuesday looks quiet on the waters.

CAR WATCHES/WARNINGS/ADVISORIES. ME . None. MARINE . None.



Near Term . AStrauser Short Term . Foisy Long Term . Foisy Aviation . AStrauser/Foisy Marine . AStrauser/Foisy

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Weather Reporting Stations

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Greenville, ME	6 mi	22 min	Var 4	mi		66°F	45°F	47%	1025.8 hPa

Link to 5 minute data for KGNR

Wind History from GNR (wind in knots)

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Tide / Current Tables for Bangor, Penobscot River, Maine (2)

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Tide / Current Tables for Bangor, Penobscot River, Maine

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Weather Map

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GEOS Local Image of    EDIT
NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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