Thursday, June21, 2018 L-36.com


Marine Weather and Tides
South Portland, ME

Version 3.4
What's New / NOTES
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.

Sunrise 4:58AMSunset 8:28PM Thursday June 21, 2018 10:13 AM EDT (14:13 UTC) Moonrise 1:58PMMoonset 1:27AM Illumination 57% Phase: First Quarter Moon; Moon at 8 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- 931 Am Edt Thu Jun 21 2018
This afternoon..NE winds around 5 kt, becoming se around 5 kt. Seas 1 to 2 ft early, then 1 foot or less.
Tonight..SW winds around 5 kt, becoming N after midnight. Seas 1 foot or less.
Fri..NE winds 5 to 10 kt, becoming S in the afternoon. Seas 1 foot or less.
Fri night..S winds 5 to 10 kt. Seas 1 foot or less.
Sat..S winds 5 to 10 kt. Seas 1 foot or less, then around 2 ft in the afternoon. A chance of showers in the afternoon.
Sat night..S winds 5 to 10 kt. Seas 2 to 3 ft. Showers.
Sun..SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
Sun night..NW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
Mon..N winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
Mon night..NW winds 5 to 10 kt. Seas 1 foot or less.
ANZ100 931 Am Edt Thu Jun 21 2018
Synopsis for stonington me to merrimack river ma out to 25 nm.. High pressure builds into the region through Friday with fair weather. Low pressure approaches from the west early on Saturday with the potential for showers and perhaps Thunder Saturday afternoon through Sunday night. High pressure then builds in later 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 211340
afdgyx
area forecast discussion
national weather service gray me
940 am edt Thu jun 21 2018

Synopsis
A cold front will drop south across the region early this
morning. High pressure will then build into the region through
Friday with fair weather. Low pressure approaches from the west
early on Saturday with the potential for showers and perhaps
thunder Saturday afternoon through Sunday night. High pressure
then builds in later Monday, bringing dry conditions into
midweek next week along with a moderating trend.

Near term until 6 pm this evening
940 am update... Have updated the forecast to include slight
chance to chance pops across southernmost me and southernmost nh
for this afternoon. The hrrr and other mesoscale model guidance
suggests that a few showers will develop in vicinity of sfc
convergence zone. Have not added thunder at this time as
instability is expected to be weak at best. Otherwise, have
adjusted sky cover and temperatures based on latest trends.

Previously...

715 am update: estf update to input latest obs data. No changes
needed at this time. Cold front moving through the region at
this time with nothing more than some mid level clouds as
expected.

Previous discussion:
the cold front with very limited moisture passes through the
region early this morning with nothing more than some mid clouds
expected through the morning and into the afternoon over
southern areas. Clearing takes place from north to south in the
afternoon. There will be some onshore flow developing in the
afternoon along the coast due to the very light north gradient
that washes out in the afternoon. Temps will be cooler today
with highs ranging from the mid 60s over northern areas and 70s
elsewhere.

Short term 6 pm this evening through 6 pm Friday
The center of high pres settles over the area tonight providing
clear skies, calm winds, and a very dry air mass allowing
strong radiational cooling allowing temps to fall into the 40s
to lower 50s.

Friday the center of high pres will begin to move offshore
allowing a return southerly flow to develop. Skies will be
sunny. Temps will be coolest along coastal areas Friday due to
the southerly onshore flow. Highs will be generally in the 70s
except some mid to upper 60s along coastal areas.

Long term Friday night through Wednesday
A ridge of high pressure will exit east of the gulf of maine
Friday night. This will allow an upper level trough to approach
from the southwest on Saturday. Clouds will increase, thicken
and lower during the day with scattered showers expected, mainly
during the afternoon hours. An easterly flow will develop,
keeping temperatures on the cool side, especially along the
coast.

The upper low will weaken and quickly move across northern new
england Saturday night before an upper level trough
reestablishes itself over the northeast on Sunday. More
showers are expected during this period with instability
sufficient to trigger an outside chance of a thunderstorm over
far southern new hampshire during the day.

One last impulse associated with the upper level trough swings
across the region on Monday, bringing scattered showers to the
region, especially during the late morning and early afternoon
hours. Thereafter, drier air arrives Monday afternoon as a large
upper level ridge develops over the eastern united states. Dry
conditions will persist into midweek next week, along with
moderating temperatures.

Aviation 14z Thursday through Monday
Short term...VFR conditions through Friday. Expect winds on the
coastal plain and across southern nh to become E SE this
afternoon.

Long term... Expect MVFR conditions in scattered showers late
Saturday through Monday.

Marine
Short term... Winds and seas will remain below SCA thresholds
through Friday.

Long term... Winds and seas will approach SCA thresholds
associated with low pressure in the gulf of maine Sunday night
into early Monday.

Gyx watches warnings advisories
Me... None.

Nh... None.

Marine... None.

Near term update... Ekster


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CASM1 - 8418150 - Portland, ME 3 mi49 min 71°F 56°F1008.2 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 12 mi83 min W 3.9 G 3.9 60°F 56°F2 ft1007.7 hPa (+1.8)55°F
WEXM1 - Wells Reserve, ME 25 mi73 min NW 2.9 68°F 58°F
WELM1 - 8419317 - Wells, ME 27 mi43 min N 5.1 G 6 69°F 57°F1008.4 hPa
44030 - Buoy B0102 - Western Maine Shelf 33 mi69 min NNW 3.9 G 3.9 64°F 60°F1 ft1006.4 hPa

Wind History for Wells, ME
(wind in knots)    EDIT      (on/off)   Help
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G6
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Portland, Portland International Jetport, ME1 mi82 minNNW 510.00 miOvercast70°F57°F66%1008 hPa

Wind History from PWM (wind in knots)
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Last 24hrS12SW8S10
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S7S5SW6SW4SW6W5W5W335W65NW3NW4N55
1 day agoNW15
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NW10NW4W4NW4W6CalmW4W4W3W3W54W55S11
2 days agoS10S14
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S135E4
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S105NW8NW9NW13
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Tide / Current Tables for Fore River, Maine
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Fore River
Click for Map
Thu -- 12:06 AM EDT     0.49 feet Low Tide
Thu -- 01:27 AM EDT     Moonset
Thu -- 04:59 AM EDT     Sunrise
Thu -- 06:19 AM EDT     9.63 feet High Tide
Thu -- 12:34 PM EDT     0.10 feet Low Tide
Thu -- 01:57 PM EDT     Moonrise
Thu -- 06:59 PM EDT     9.87 feet High Tide
Thu -- 08:26 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.50.92.54.778.79.69.48.15.93.51.40.30.21.33.35.77.99.49.99.37.65.33

Tide / Current Tables for Cow Island, Maine
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Cow Island
Click for Map
Thu -- 12:04 AM EDT     0.49 feet Low Tide
Thu -- 01:26 AM EDT     Moonset
Thu -- 04:59 AM EDT     Sunrise
Thu -- 06:16 AM EDT     9.63 feet High Tide
Thu -- 12:32 PM EDT     0.10 feet Low Tide
Thu -- 01:57 PM EDT     Moonrise
Thu -- 06:56 PM EDT     9.87 feet High Tide
Thu -- 08:26 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.512.64.87.18.89.69.385.83.41.40.30.21.33.45.889.49.99.27.55.22.9

Weather Map and Satellite Images
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wmap_A
GOES Local Image of Northeast    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
target = "new">Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Gray/Portland, ME (10,2,3,4)
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Ground Weather Radar Station Portland, ME
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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.