Saturday, March25, 2017 L-36.com


Marine Weather and Tides
South Portland, ME

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:31AMSunset 7:01PM Saturday March 25, 2017 7:29 PM EDT (23:29 UTC) Moonrise 5:20AMMoonset 4:19PM Illumination 3% Phase: Waning Crescent; Moon at 28 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- 620 Pm Edt Sat Mar 25 2017
Tonight..N winds 5 to 10 kt. Seas 1 foot or less.
Sun..NE winds 5 to 10 kt...becoming E in the afternoon. Seas 1 foot or less.
Sun night..SE winds 5 to 10 kt. Seas 1 foot or less. A chance of drizzle. A chance of snow and sleet in the evening... Then rain likely after midnight. Patchy fog. Vsby 1 to 3 nm.
Mon..SE winds 5 to 10 kt. Seas 2 to 4 ft. Patchy fog in the morning. Rain or snow or sleet likely in the morning... Then rain in the afternoon. Vsby 1 to 3 nm in the morning.
Mon night..E winds 5 to 10 kt with gusts up to 20 kt... Becoming W after midnight. Seas 2 to 4 ft. Rain likely...mainly in the evening.
Tue..NW winds around 5 kt...becoming ne around 5 kt in the afternoon. Seas 2 to 3 ft. A chance of rain.
Tue night..NE winds around 5 kt. Seas 2 to 3 ft. A chance of rain in the evening...then a chance of showers after midnight.
Wed..N winds 5 to 10 kt. Seas 2 to 3 ft.
Wed night..NW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft.
Thu..NW winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft.
Thu night..NW winds 5 to 10 kt. Seas around 2 ft.
ANZ100 620 Pm Edt Sat Mar 25 2017
Synopsis for stonington me to merrimack river ma out to 25 nm.. A cold front will drop south through the gulf of maine and down to southern new england tonight. High pressure moves in from the north and then tracks east across maine on Sunday. SEveral waves of low pressure will move along the remnant frontal boundary near southern new england and cape cod next week.

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 252225
afdgyx
area forecast discussion
national weather service gray me
625 pm edt Sat mar 25 2017

Synopsis
A cold front stalls south of the region this evening. High
pressure builds in overnight from the north and will shift east
on Sunday. A warm front will approach from the southwest on
Sunday before a weak wave of low pressure forms and passes
through the gulf of maine Monday. This will provide a round of
mixed wintry precipitation Sunday night into Monday. Low
pressure moves north of the region on Tuesday and drags a cold
front through on Wednesday. High pressure will build in from
canada for the end of the week.

Near term /until 6 am Sunday morning/
620 pm update: skies have cleared across all but southernmost
areas of nh which will occur in the next hour or so as rapid
clearing continues from the north. Made some adjustments to sky
cover for early this evening based on clearing trends. After
input of latest mesonet data no other changes were needed at
this time.

Previous discussion:
bands of snow, some of them heavy will exit southern new
hampshire over the next one to two hours. Thereafter, canadian
high pressure will build southward, clearing skies across the
region. Cooler and drier air will be filtering south and into
maine and new hampshire. This will allow temperatures to fall
into the single numbers in the north with teens and 20s further
to the south.

Short term /6 am Sunday morning through Sunday night/
Flow will become easterly on Sunday. This will allow for low
level moisture to enter coastal areas and also portions of
southern new hampshire. Clouds will also be advecting into the
region from the next system. Cloud cover appearing after a cold,
clear night will keep some of the cooler readings in our region
for this time of the year with highs mainly in the upper 30s.

Sufficient easterly flow will allow for patchy drizzle to enter
the region at some point during the day Sunday. By Sunday
evening, synoptically driven precipitation will enter the region
as low pressure head towards the great lakes. Cold air damming
will continue however as high pressure remains to our north and
east. Expect a coastal front to develop as well.

Followed the cooler models for this package. Expect more in the
way of snow and sleet over central and northern areas with
freezing rain expected over southern and western new hampshire
as well as coastal maine just inland from the coastal front.

Some freezing rain may reach northern areas towards the long
range portion of the forecast.

Will update ice and snowfall maps to lean towards this cooler
solution. Temperatures Sunday night will likely hold fairly
steady.

Qpf looks to be slightly over a half inch for much of our area
with several inches of snow over interior regions along with a
coating of ice.

Long term /Monday through Saturday/
The models are in decent agreement on the longwave pattern into
late next week. We begin the period with a shortwave impulse over
the eastern great lakes. This impulse will weaken as it rides
northeast across new england Monday into Monday night. At the
surface... Low pressure will ride northeast into quebec with a warm
front moving into southern and western new england. Models strongly
hint that the warm front will hang up to our south with light
overrunning precipitation for Monday and Monday night. A series of
weak impulses will keep things unsettled for Tuesday. By Wednesday... Digging
shortwave impulse will close off over new england with a continuation
of unsettled conditions. This low and associated surface system will
exit into the maritimes during Thursday... With lingering clouds and
showers confined to higher terrain as well as our eastern maine
zones. Ridging arrives just in time for a quiet end to the work
week. Thereafter... Considerable uncertainty exists in sensible
weather details as medium range models show considerable spread in
solutions.

Aviation /00z Sunday through Thursday/
Short term...VFR tonight. Conditions lowering to ifr and
localized lifr by Sunday night. There could be some llws
developing Sunday night if the winds above the surface increase
enough.

Long term...

mon... Ifr with LCL ifr in rain with areas of sleet and freezing
rain psb Mon at non-coastal TAF sites.

Tue... MVFR with areas of ifr in ceilings, -shra and fog.

Wed - thu... Areas of MVFR in -shra/-shsn.

Nw sfc wind gusting to 25 kt.

Marine
Short term... No flags.

Long term...

mon... Small craft conditions are likely.

Wed - thu... Small craft conditions are likely.

Gyx watches/warnings/advisories
Me... None.

Nh... None.

Marine... None.

Near/short term... Marine


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CASM1 - 8418150 - Portland, ME 3 mi42 min 42°F 36°F1025.8 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 12 mi40 min SW 7.8 G 9.7 38°F 38°F1 ft1026 hPa (+0.9)36°F
WEXM1 - Wells Reserve, ME 25 mi90 min WSW 2.9 40°F 35°F
WELM1 - 8419317 - Wells, ME 27 mi42 min W 2.9 G 5.1 38°F 38°F1026.4 hPa
44030 - Buoy B0102 - Western Maine Shelf 33 mi86 min W 9.7 G 12 38°F 39°F2 ft1025.9 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 mi39 minW 510.00 miPartly Cloudy38°F30°F73%1026 hPa

Wind History from PWM (wind in knots)
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Last 24hrSW3CalmW3W5W4W6NW4NW4N5NW4NW5N4N8N4NE5NE1044W3W7NW4W5W7W5
1 day agoNW8N4CalmN4CalmCalmCalmSE4CalmSW5SW3CalmCalmS8S8S14
G20
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2 days agoNW20
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Tide / Current Tables for Fore River, Maine
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Fore River
Click for Map
Sat -- 03:31 AM EDT     0.88 feet Low Tide
Sat -- 05:20 AM EDT     Moonrise
Sat -- 06:34 AM EDT     Sunrise
Sat -- 09:45 AM EDT     9.46 feet High Tide
Sat -- 04:02 PM EDT     0.19 feet Low Tide
Sat -- 04:19 PM EDT     Moonset
Sat -- 07:00 PM EDT     Sunset
Sat -- 10:16 PM EDT     9.17 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.93.82111.93.767.99.29.48.774.72.40.80.20.72.24.46.68.39.18.9

Tide / Current Tables for Cow Island, Maine
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Cow Island
Click for Map
Sat -- 03:29 AM EDT     0.88 feet Low Tide
Sat -- 05:19 AM EDT     Moonrise
Sat -- 06:34 AM EDT     Sunrise
Sat -- 09:42 AM EDT     9.46 feet High Tide
Sat -- 04:00 PM EDT     0.19 feet Low Tide
Sat -- 04:19 PM EDT     Moonset
Sat -- 06:59 PM EDT     Sunset
Sat -- 10:13 PM EDT     9.17 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.83.721123.86.189.29.48.66.94.62.30.70.20.72.24.46.78.49.18.9

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 (19,4,5,8)
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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.