Wednesday, April21, 2021
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Marine Weather and Tides
Falmouth, ME

Version 3.4
NOTICE
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.

Sunrise 5:46AMSunset 7:33PM Wednesday April 21, 2021 4:53 PM EDT (20:53 UTC) Moonrise 12:52PMMoonset 3:18AM Illumination 74% Phase: Waxing Gibbous; Moon at 10 days in cycle
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.
Marine Forecasts
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ANZ153 Casco Bay- 242 Pm Edt Wed Apr 21 2021
.gale warning in effect from late tonight through Friday morning...
Tonight..S winds 15 to 20 kt, becoming nw 10 to 20 kt late this evening and early morning, then becoming 15 to 20 kt late. Gusts up to 30 kt. Seas 2 to 4 ft. Rain with a slight chance of tstms this evening, then a chance of rain after midnight. Vsby 1 to 3 nm this evening, then 1 to 3 nm late.
Thu..NW winds 15 to 20 kt, becoming W 20 to 25 kt in the afternoon. Gusts up to 40 kt. Seas 2 to 4 ft.
Thu night..W winds 15 to 25 kt with gusts up to 30 kt. Seas 2 to 4 ft.
Fri..W winds 15 to 20 kt with gusts up to 30 kt. Seas 2 to 4 ft.
Fri night..W winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft.
Sat..SW winds around 10 kt. Seas around 2 ft.
Sat night..S winds 5 to 10 kt. Seas 1 to 2 ft. A chance of showers after midnight.
Sun..SE winds 5 to 10 kt, becoming E 10 to 15 kt in the afternoon. Seas 1 to 2 ft. Rain.
Sun night..NE winds 10 to 15 kt, becoming nw after midnight. Seas 2 to 3 ft. Rain in the evening, then a chance of showers after midnight.
Mon..NW winds around 15 kt. Seas 2 to 4 ft. A chance of showers in the morning.
Mon night..NW winds 10 to 15 kt. Seas 2 to 4 ft. Winds and seas higher in and near tstms.
ANZ100 242 Pm Edt Wed Apr 21 2021
Synopsis for stonington me to merrimack river ma out to 25 nm.. Low pressure overhead will strengthen as it moves northeast into new brunswick tonight and Thursday with northwesterly gales over the waters. These winds will continue through the remainder of the week but gradually weaken. High pressure briefly moves over the waters late Saturday and Saturday night before a coastal low pressure system moves into the gulf of maine Sunday night and Monday with another round of strong winds possible.


7 Day Forecast for Marine Location Near Falmouth, ME
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location: 43.71, -70.23     debug


Area Discussion for - Gray/Portland, ME
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FXUS61 KGYX 211919 AFDGYX

Area Forecast Discussion National Weather Service Gray ME 319 PM EDT Wed Apr 21 2021

SYNOPSIS. Low pressure and a cold front will cross the region this evening resulting in showers and isolated thunderstorms. The low will drift east of the area overnight tonight resulting in a strengthening northwest wind, colder temperatures, and scattered rain and snow showers on Thursday. On Friday high pressure will build south of the region resulting a some moderation in temperatures however winds will remain gusty. This area of high pressure will result in improved and warmer weather for Saturday before another area of low pressure returns the likelihood of wind and rain over the area on Sunday.

NEAR TERM /TONIGHT/.

Pattern: Shortwave trough along the eastern edge of a much larger scale trough at H5 is moving north and east into New England as of this afternoon with attendant surface low pressure moving into southern New England. This low is riding north and east along a very strong baroclinic zone with T8s ranging nearly 20C from Lake Ontario to Nantucket. This implies strong mid/upper level flow with near term RAP analyses and forecasts showing a 80-90kt coupled jet on the 1.5PVU surface.

Through this evening: Initial round of rain and embedded thunder is moving north and east . with temperatures having dropped 10-15F in it/s wake. Regional GOES 16 imagery shows some clearing west of this activity . providing perhaps an hour or two of heating before the next convective line associated with the surface cold front and low center arrives. Lightning is expanding across the Berkshires with 500 J/kg of MUCAPE ahead of this line. This line will be combating decreasing instability as it moves north and east . but there is a threat of a strong/severe storm along our far southern border /along and south of a EEN-MHT-PSM line/ through 6pm. Otherwise . temperatures will start to fall rapidly from west to east through 8pm as the cold front moves across the forecast area.

Tonight: Cold front quickly sweeps east with precipitation ending during the evening hours over southern areas. Further north . as cold air arrives . expect rain to changeover to snow and linger longer over the mountains . with some light accumulations through daybreak. Deepening low pressure to our northeast and strengthening cold advection will cause winds to strengthen across the area as we move towards daybreak with lows falling into the 20s in the mountains and foothills . and close to the freezing mark further south and east.

SHORT TERM /THURSDAY AND THURSDAY NIGHT/.

High Impact Weather Potential: * Wind gusts approach advisory levels on Thursday. * Accumulating snow comes to an end over far northern areas.

Pattern: Longwave trough axis shifts east and overhead through the short term period as low pressure strengthens upon departing the northeast. Primary forecast concerns center on 1-the continuation of mountain snow shower activity and expected accumulations and 2- strong northwesterly winds given an impressive gradient on the western flank of the departing low.

Thursday: West-northwest winds will primarily be gradient-driven with cold advection pretty much having ended by daybreak and little isallobaric assistance Still. the H9 gradient supports winds 30- 40kt at this level which with deep boundary layer mixing should allow much of this to mix to the surface. Model soundings support gusts 30-40 mph and changed little from inherited forecast. Given some of the other missing ingredients . expect that we/ll fall a bit short of wind advisory criteria and will hold off on issuing any headlines. T9s will remain below 0C through the day which translates to highs in the 30s across the north and low to perhaps mid 40s across the south . with wind chills about 10F colder than this given the strong winds.

Upslope snow showers will gradually wane through the day Thursday with another 1-2" along the Canadian border.

Thursday Night: Cool cyclonic flow will continue through the night with continued drying bringing mountain snow showers to an end. It will remain breezy given gradient between 975 mb low over eastern New Brunswick and high pressure over the southeastern US. This full mixing should keep temperatures from going too low, but the airmass itself will be cold enough to allow lows to fall into the 20s in the mountains and right around the freezing mark to the south.

LONG TERM /FRIDAY THROUGH WEDNESDAY/. A rather active weather pattern to continue in the long range forecast period. Early in the period low pressure over the Maritimes will continue a cyclonic flow of cool air over the region. While it will not be as windy as the previous day, winds will still be gusty on Friday. While most of the area will be dry, with cyclonic flow aloft and an upslope wind direction there may still be some isolated shower activity over the mountains during the morning. On Saturday, high pressure located to our south will briefly nose in resulting in warmer temperatures and dry weather. By Saturday Night low pressure ejecting NE out of the Tennessee Valley will rapidly strengthen and move to the Mid Atlantic Coast. Clouds will overspread the region overnight Saturday with rain developing by daybreak over NH. As the low continues to strengthen over the Southern Gulf of Maine, the rain shield will overspread Western Maine Sunday morning and may become locally heavy during the day. Rain will taper to showers Sunday Night as the low moves NE of the area. As colder air moves in, mountain areas will see the chance of snow showers returning. GFS-ECMWF-Canadian models agree in the over all evolution of this pattern but there are some subtle differences. ECMWF is the strongest and furthest west with this track. GFS is a bit weaker and further east and the Canadian is faster and further NE with the system. This far out these differences are not that large and within the range of possibilities. Another thing to keep an eye on are tides which start to increase astronomically on Sunday and therefore some splashover is a possibility during Sundays high tides.

Behind this low on Monday expect a cyclonic flow to once again produce a few showers and cooler breezy conditions. High pressure builds in on Tuesday and crests over the area on Wednesday resulting in dry conditions and moderating temperatures.

AVIATION /18Z WEDNESDAY THROUGH MONDAY/. Short Term .

Summary: Low pressure crosses the region tonight with rain and snow ending late this evening before strong winds develop for Thursday and Thursday night along with continuing mountain snow showers.

Restrictions: VFR conditions with some embedded MVFR at the moment in SHRA. This will continue through this evening before the cold front pushes through the region For HIE. this will transition rain to snow with IFR conditions likely. For LEB-AUG-RKD MVFR will dominate through the night with VFR and occasional MVFR to the south Outside of HIE. conditions should improve to VFR for Thursday and continue VFR through Thursday night. Improvement to VFR will come by late day Thursday at HIE and remain generally VFR through Thursday night.

Winds: Southeasterly winds 5-10kts will shift westerly this evening and increase to 10g16kts for the overnight before strengthening further from the WNW during the day Thursday . reaching 20G30kts. Winds will diminish to 10g20kts Thursday night.

Lightning: There is a low chance of lightning for CON/MHT/PSM/PWM through 00Z with gusty winds possible with any thunderstorms that occur.

LLWS: No LLWS is expected through Thursday night.

Long Term . Generally VFR to MVFR Friday and Saturday. Widespread IFR with possible LIFR conditions Sunday as widespread rain develops. MVFR south of the mountains on Monday.

MARINE. Short Term . Southerly winds gusting to near 30kts through this evening will shift to the west northwest and strengthen overnight with gales likely all waters through Thursday night.

Long Term . SCA wind and waves Friday diminishing in the afternoon and evening. Conditions below SCA levels Saturday into Sunday. Wind and waves building to SCA levels later Sunday and lasting into Tuesday.

GYX WATCHES/WARNINGS/ADVISORIES. ME . None. NH . Winter Weather Advisory from 6 PM this evening to 2 PM EDT Thursday for NHZ001. MARINE . Gale Warning from 4 AM Thursday to 11 AM EDT Friday for ANZ150>154.

SYNOPSIS . Lulofs NEAR TERM . Arnott SHORT TERM . Arnott LONG TERM . Lulofs AVIATION . Arnott MARINE . Arnott/Lulofs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CASM1 - 8418150 - Portland, ME 4 mi53 min 51°F 46°F
44007 - PORTLAND 12 NM Southeast of Portland,ME 14 mi33 min NW 9.7 G 14 48°F 45°F999.2 hPa47°F
WEXM1 - Wells Reserve, ME 31 mi53 min NNW 5.1 53°F 50°F
WELM1 - 8419317 - Wells, ME 32 mi53 min NNE 6 G 8.9 53°F 47°F999.8 hPa (-3.2)
44030 - Buoy B0102 - Western Maine Shelf 38 mi109 min S 19 G 21 50°F 5 ft998.5 hPa
44032 - Buoy E0104 - Central Maine Shelf 46 mi109 min SSE 18 G 21 48°F 43°F4 ft1001.7 hPa

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Portland, Portland International Jetport, ME6 mi62 minNNW 95.00 miLight Rain Fog/Mist50°F49°F96%1000.1 hPa
Auburn-Lewiston, ME24 mi57 minN 05.00 miRain Fog/Mist49°F48°F97%1001.4 hPa

Link to 5 minute data for KPWM

Wind History from PWM (wind in knots)
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W6W3W5SW3SW5CalmW4CalmCalmNW3N3CalmE4E6S10
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1 day agoS8S8S6CalmS3W3S3SW4CalmCalmW4W5W3SW4CalmNW33SE6S9S10
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2 days ago4NW6NW6NW5SW3SW6CalmCalmCalmCalmCalmW6CalmW4W3NW5NW4NW4SW6CalmS8S11S9
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Tide / Current Tables for Presumpscot River Bridge, Maine
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Presumpscot River Bridge
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Wed -- 12:08 AM EDT     2.17 feet Low Tide
Wed -- 03:17 AM EDT     Moonset
Wed -- 05:48 AM EDT     Sunrise
Wed -- 06:20 AM EDT     8.80 feet High Tide
Wed -- 12:52 PM EDT     Moonrise
Wed -- 12:53 PM EDT     1.19 feet Low Tide
Wed -- 07:10 PM EDT     8.13 feet High Tide
Wed -- 07:32 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.22.53.44.96.688.88.67.86.34.42.71.51.21.72.94.66.37.68.17.975.53.8

Tide / Current Tables for Doyle Point, Maine
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Doyle Point
Click for Map
Wed -- 12:01 AM EDT     1.80 feet Low Tide
Wed -- 03:17 AM EDT     Moonset
Wed -- 05:47 AM EDT     Sunrise
Wed -- 06:17 AM EDT     8.72 feet High Tide
Wed -- 12:46 PM EDT     0.99 feet Low Tide
Wed -- 12:51 PM EDT     Moonrise
Wed -- 07:07 PM EDT     8.05 feet High Tide
Wed -- 07:31 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.82.23.24.86.688.78.57.664.12.31.211.62.84.66.37.687.86.75.13.4

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