Sunday, September23, 2018 L-36.com


Marine Weather and Tides
South Portland, ME

Version 3.4
What's New / NOTES
9/17/2018 XTide broke when 1and1 "upgraded" my server. It has been esculated. I am sorry for the problem.

Sunrise 6:29AMSunset 6:37PM Sunday September 23, 2018 10:28 PM EDT (02:28 UTC) Moonrise 6:21PMMoonset 4:42AM Illumination 99% Phase: Waxing Gibbous; Moon at 14 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- 1013 Pm Edt Sun Sep 23 2018
Tonight..SW winds around 5 kt, becoming nw 5 to 15 kt with gusts up to 25 kt after midnight. Seas 1 foot or less, then 1 to 2 ft after midnight.
Mon..NE winds 10 to 20 kt with gusts up to 25 kt, becoming E 5 to 10 kt in the afternoon. Seas around 2 ft.
Mon night..E winds 5 to 10 kt. Seas 1 to 2 ft.
Tue..SE winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers in the morning, then rain likely in the afternoon.
Tue night..S winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Rain.
Wed..S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. Rain in the morning, then showers in the afternoon.
Wed night..SW winds around 10 kt with gusts up to 20 kt, becoming W after midnight. Seas 2 to 4 ft. Showers.
Thu..N winds 5 to 10 kt. Seas 2 to 4 ft.
Thu night..NE winds around 5 kt. Seas 2 to 3 ft.
Fri..E winds around 5 kt. Seas 2 to 3 ft. A chance of showers.
Fri night..W winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers.
ANZ100 1013 Pm Edt Sun Sep 23 2018
Synopsis for stonington me to merrimack river ma out to 25 nm.. High pressure will be building south from canada tonight. This high will crest over the area Monday before shifting east through Monday night. A warm front will approach from the southwest on Tuesday and will lift into northern maine Tuesday night. Low pressure will move northeast through central quebec on Wednesday and will drive a trailing cold front through the region Wednesday night. High pressure will build in from the west on Thursday. &&


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 240049
afdgyx
area forecast discussion
national weather service gray me
849 pm edt Sun sep 23 2018

Synopsis
A cold front will drop south through the region this evening
and will be followed by high pressure building south from canada
overnight. The high will crest over the area Monday before
shifting east through Monday night. A warm front will approach
from the southwest on Tuesday and will lift into northern maine
Tuesday night. Low pressure will move northeast through central
quebec on Wednesday and will drive a trailing cold front through
the region Wednesday night. High pressure will build in from
the west on Thursday and Friday.

Near term through Monday
Update...

have updated the forecast based on current surface observations
and satellite observations. Mainly clear skies continue over
central areas, with high clouds across the far south and low to
mid level cloudiness over the north. Temperatures continue to
drop through the 40s in most central and northern areas. Have
backed off a tad on the late night wind forecast for coastal
areas and lowered the gusts. Also added patchy late night fog
across the northern valleys after midnight.

Prev disc...

a cold front currently draped just north of the
border will drop south out of canada and into maine and new
hampshire tonight. These clouds and the increasing winds behind
the front will help to keep temperatures slightly warmer than
last night, enough to prevent a frost in all but the easternmost
areas. Through somerset and interior waldo clearing skies
behind the front near daybreak may allow for some patchy frost
to form in the valleys and a frost advisory has been issued.

Short term Monday night
High pressure will build in for Monday. Temperatures will be
cooler than the past few days with the high temperatures in the
50s. Overnight expect clear skies in the north to once again
allow temperatures to drop to near freezing and additional frost
advisories are possible.

Monday night increasing cloud cover starts to encroach on the
southwestern portion of new hampshire as low pressure begins to
move out of the ohio valley.

Long term Tuesday through Sunday
A large anticyclone will remain over the canadian maritimes on
Tuesday. This will set up a moist southeasterly flow to form off
the gulf of maine during the day. Strong warm air advection and
a sufficient moisture supply will lead in showers overspreading
the region along with chilly temperatures in the mid 50s north
to the lower 60s south.

A warm front will lift north of the region Tuesday night into
Wednesday, driven poleward by an increasing southwesterly
gradient. Some of the showers during this period may be locally
heavy as precipitable water values and surface dew points will
be on the rise. An outside chance for a thunderstorm remains
possible as well on Wednesday.

By Thursday, high pressure over the great lakes will allow drier
air to enter new england. Cold air advection will be limited, so
a significant cool down is not expected.

12z model guidance suggests low pressure will linger east of the
gulf of maine on Friday before it is swept out to sea. This will
be followed by high pressure building east for next weekend.

Aviation 01z Monday through Friday
Short term...VFR conditions will continue through tonight and
into Monday night everywhere except the connecticut river valley
where overnight valley fog will drop leb and possibly hie to
lifr.

Long term... Ifr conditions developing Tuesday and persisting
into Wednesday evening. Lifr conditions are possible in any
heavy showers or thunderstorms during the period.VFR conditions
should return Thursday.

Marine
Short term... Gusty winds in the wake of a cold frontal passage
will reach 25 to 30kts early Monday morning and a SCA has been
issued.

Long term... Scas possible Tuesday and Wednesday as an
increasing southwest flow develops across the waters. A gusty
northwest flow will follow the front Thursday.

Gyx watches warnings advisories
Me... Frost advisory from 2 am to 9 am edt Monday for mez014-022.

Nh... None.

Marine... Small craft advisory from 1 am to 2 pm edt Monday for
anz150>152-154.

Jc


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CASM1 - 8418150 - Portland, ME 3 mi40 min 61°F1025.6 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 12 mi38 min S 1.9 G 3.9 60°F 60°F2 ft1025.2 hPa (+1.4)57°F
WEXM1 - Wells Reserve, ME 25 mi88 min WSW 2.9 55°F 52°F
WELM1 - 8419317 - Wells, ME 27 mi40 min 55°F 62°F1025.8 hPa

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Portland, Portland International Jetport, ME1 mi37 minWNW 310.00 miFair53°F51°F93%1026 hPa

Wind History from PWM (wind in knots)
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Last 24hr5Calm4CalmNW33W4W5W6Calm456S3E7SE7S8SE9S6S7S3SE6CalmW3
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NW8NW8NW73Calm--NW3
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Tide / Current Tables for Fore River, Maine
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Cow Island, Maine
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map and Satellite Images
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wmap_A
GOES Local Image of    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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Gray/Portland, ME (22,6,7,8)
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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.