Friday, May26, 2017 L-36.com


Marine Weather and Tides
South Portland, ME

Version 3.4
What's New / NOTES
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.

Sunrise 5:03AMSunset 8:13PM Friday May 26, 2017 8:22 PM EDT (00:22 UTC) Moonrise 6:07AMMoonset 9:09PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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- 551 Pm Edt Fri May 26 2017
Tonight..N winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers this evening. Patchy drizzle. Patchy fog. Vsby 1 to 3 nm this evening.
Sat..N winds 5 to 10 kt...becoming se in the afternoon. Seas 2 to 3 ft...subsiding to 1 to 2 ft in the afternoon.
Sat night..SW winds around 5 kt. Seas 1 to 2 ft.
Sun..SW winds 5 to 10 kt...becoming S in the afternoon. Seas 1 to 2 ft in the morning...then 1 foot or less.
Sun night..S winds 5 to 10 kt. Seas around 2 ft.
Mon..SE winds 5 to 10 kt. Seas around 2 ft. Showers likely... Mainly in the afternoon.
Mon night..E winds 5 to 10 kt. Seas around 2 ft. Showers likely... Mainly in the evening.
Tue..SE winds 5 to 10 kt. Seas 1 to 2 ft. A chance of showers.
Tue night..S winds 5 to 10 kt. Seas 1 to 2 ft. A chance of showers.
Wed..SW winds 5 to 10 kt. Seas around 2 ft. A chance of showers.
Wed night..W winds 5 to 10 kt. Seas 2 to 3 ft.
ANZ100 551 Pm Edt Fri May 26 2017
Synopsis for stonington me to merrimack river ma out to 25 nm.. Low pressure will continue through the gulf of maine this evening...exiting into the maritimes by Saturday. A brief ridge of high pressure builds in for Sunday morning ahead of a northward moving warm front. Low pressure to the west lifts north through Monday.

7 Day Forecast for Marine Location Near South Portland, ME
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location: 43.65, -70.3     debug


Area Discussion for - Gray/Portland, ME
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Fxus61 kgyx 262322
afdgyx
area forecast discussion
national weather service gray me
722 pm edt Fri may 26 2017

Synopsis
Low pressure in the gulf of maine will continue northeast into the
maritimes tonight. Weak high pressure will build over the
area on Saturday and will shift offshore on Sunday... Allowing a window
of dry weather. The next system over the eastern great lakes
will lift north into quebec Sunday night and will drag a front
toward the region on Monday bringing rain showers. That front
will slowly cross the area late Monday night and Tuesday with
unsettled weather.

Near term through Saturday
Update...

no changes to this package, except to issue coastal flood
advisories for pwm and points south (see coastal flood section
below).

Have updated the grids based on current conditions and latest
set of mesoscale models. Low level wind flow has backed to the
northwest over much of new hampshire, allowing for slightly
drier conditions over the granite state. Otherwise, north-
northeasterly surface winds continue to bring moisture into the
region around the periphery of the slowly departing area of low
pressure which continues to exit through the gulf of maine.

Have made minor adjustments to temperatures and dew points. Also
will continue the threat of drizzle along and near the coastline
and have upped pops over the region based on latest radar
imagery. Showers should gradually diminish as we move through
the night. Patchy fog is possible in most areas overnight,
especially in maine.

Prev disc...

a cool, damp cyclonic flow continues through
tonight as the center of low pressure in the gulf of maine exits
into the maritimes. Clouds and a few random lingering showers
expected through the evening. With lower levels near saturation
some patchy drizzle and fog may occur in areas along and near
the coast. Temps will only drop a few degs into the mid-upper
40s overnight. Used a blend of models for overnight lows.

Short term Saturday night
A lack of ventilation Saturday with weak high pressure over the
area will make for slow clearing to occur since there will be
lingering low level moisture. At least it will be a dry day!
temps will recover into the 60s in the afternoon as partly sunny
conditions eventually develop in the afternoon.

Saturday night the weak high pres remains over the area with dry
conditions. Overnight lows once again in the 40s.

Long term Sunday through Friday
The 500 mb pattern continues to remain dominated by moderate to
strong blocking across the NRN hemisphere, especially poleward
of about 50n. The trend for for NE CONUS will be sit at the
equatorward end of a trough, although some weak ridging will be
possible at times as well, especially mid to late week. What
this means for sensible weather is that temps will trend toward
around normal, but there will be some threats for showers at
times as weak waves move around the base of the trough to our
north. So, maybe not great weather, but better than we have had
for a large part of may.

It continue to look like we will squeeze a decent day out of
Sunday as weak 500mb ridging moves over the region and helps
support sfc high. May see more clouds clip the NE zones, but
overall partly to mostly sunny skies and highs coming close to
normal. 70-75 inland, and in the 60s along the coast, as sea
breeze develops.

Closed 500mb low begins shift SE from ontario Sun night into
Monday, with decent wave rotation around the base, and this will
bring in good threat for showers late Sunday night into Monday.

Monday, therefore is not expected to be a great day withe
numerous showers and a cool onshore flow, producing highs only
in the mid-upper 50s on the coast and 60-65 inland.

The upper level low begins to wobble NE out of the great lakes
mon night and tue, and should see a decrease in precip mon
night into early tue, but another wave will rotate around the
system by later tue, and the htreat for showers will increase.

Overall, the system aloft will be filling and flow aloft will be
shifting w-sw which should at least allow some warmer air and
some sunny breaks by Tue way from the coast, at least. Still
showers will hold in the forecast on Tue with highs ranging from
the low 60s in the eastern zones to near 70 in southern nh. As
we move into Wed and the latter part of the week, the 500 mb low
shifts slowly nne, and although there will still be some wave
rotating around it, and a threat of showers, the best chc chance
of showers will begin northward, with more breaks of sun, and
temps running close to normal, upper 60s in the mountains to mid
70s in southern nh.

Aviation 23z Friday through Wednesday
Short term... MVFR to ifr conditions at times in areas of low
clouds and patchy precipitation and fog. During Saturday
conditions improve toVFR and continue into Saturday night.

Long term...VFR Sunday into Sun evening, then MVFR to ifr
possible Sun night into Mon night, with the best chance for the
worst conditions along the coast.VFR, with tempo MVFR in
showers Tuesday into wed.

Marine
Short term... Winds have diminished and have backed to the north
and northwest. Not enough of an offshore flow to knock down the seas
until later tonight so expect they will remain high through
the night over the outer waters and will issue a SCA for
hazardous seas into Saturday morning. During Saturday and
Saturday night winds and seas will be light as we enter into a
col zone.

Long term... For the most part winds seas will remain below sca
conditions Sunday through wed.

Tides coastal flooding
The astronomical high tide in portland is 12.0 feet mllw in
portland at 12:22 am Saturday. A storm surge will remain at
about a half foot through high tide, bringing the storm tide to
12.5 in portland. Flood stage is 12.0 feet. Have issued a
coastal flood advisory for pwm and points south along the coast
to the nh seacoast for minor flooding and possibly minor
splash-over.

Gyx watches warnings advisories
Me... Coastal flood advisory from 11 pm this evening to 1 am edt
Saturday for mez023-024.

Nh... Coastal flood advisory from 11 pm this evening to 1 am edt
Saturday for nhz014.

Marine... Small craft advisory for hazardous seas until 8 am edt
Saturday for anz152-154.

Small craft advisory for hazardous seas until 2 pm edt
Saturday for anz150.

Near short term and coastal flooding... Cannon


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CASM1 - 8418150 - Portland, ME 3 mi52 min 54°F 50°F1004 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 12 mi92 min NNW 12 G 16 51°F 48°F6 ft1002.8 hPa (+2.6)50°F
WEXM1 - Wells Reserve, ME 25 mi82 min N 5.1 55°F 51°F
WELM1 - 8419317 - Wells, ME 27 mi52 min N 8 G 11 55°F 1004.1 hPa
44030 - Buoy B0102 - Western Maine Shelf 33 mi78 min N 5.8 G 7.8 51°F 49°F7 ft1003.4 hPa

Wind History for Wells, ME
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Portland, Portland International Jetport, ME1 mi31 minVar 610.00 miOvercast53°F48°F83%1004.4 hPa

Wind History from PWM (wind in knots)
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Last 24hrE13
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CalmNE9NE13NE13
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NE12NE13NE11N7N7N11N7N8N8N9
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1 day agoS3S4S3CalmCalmCalmCalmCalmE3Calm4E5E6E6E10E11E17
G25
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2 days agoS3CalmCalmSW3CalmCalmCalmN3N3CalmN3N33E4E5E5E5E6SE6SE6S5S6SE5S3

Tide / Current Tables for Fore River, Maine
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Fore River
Click for Map
Fri -- 05:06 AM EDT     Sunrise
Fri -- 05:56 AM EDT     -1.84 feet Low Tide
Fri -- 06:07 AM EDT     Moonrise
Fri -- 12:11 PM EDT     10.61 feet High Tide
Fri -- 06:09 PM EDT     -0.79 feet Low Tide
Fri -- 08:10 PM EDT     Sunset
Fri -- 09:09 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.710.37.74.31.1-1.1-1.8-11.24.37.49.610.610.28.45.62.60.2-0.8-0.21.74.77.910.5

Tide / Current Tables for Cow Island, Maine
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Cow Island
Click for Map
Fri -- 05:05 AM EDT     Sunrise
Fri -- 05:54 AM EDT     -1.84 feet Low Tide
Fri -- 06:07 AM EDT     Moonrise
Fri -- 12:08 PM EDT     10.61 feet High Tide
Fri -- 06:07 PM EDT     -0.79 feet Low Tide
Fri -- 08:10 PM EDT     Sunset
Fri -- 09:08 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
11.610.27.54.10.9-1.2-1.8-0.91.34.47.59.710.610.18.35.52.50.2-0.8-0.21.84.8810.6

Weather Map and Satellite Images
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Weather Map
wmap_A
IR Satellite Image from GEOS
east_satellite

GOES Local Image of Northeast    EDIT
Geos

Wind Forecast for Gray/Portland, ME (20,4,5,8)
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Ground Weather Radar Station Portland, ME
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weather_mapweather_map weather_map

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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.