Thursday, August17, 2017 L-36.com


Marine Weather and Tides
South Portland, ME

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
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 5:47AMSunset 7:42PM Thursday August 17, 2017 3:13 PM EDT (19:13 UTC) Moonrise 1:16AMMoonset 4:23PM Illumination 21% Phase: Waning Crescent; Moon at 25 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- 305 Pm Edt Thu Aug 17 2017
Tonight..W winds 5 to 10 kt, becoming ne after midnight. Seas 2 to 3 ft.
Fri..E winds 5 to 10 kt, becoming se in the afternoon. Seas 1 to 2 ft. A chance of showers in the morning, then showers in the afternoon.
Fri night..S winds 10 to 15 kt, becoming sw 5 to 15 kt after midnight. Seas 2 to 4 ft. Showers. Patchy fog. Vsby 1 to 3 nm.
Sat..S winds 5 to 10 kt. Seas 2 to 4 ft. Patchy fog in the morning. A chance of showers. Vsby 1 to 3 nm in the morning.
Sat night..S winds 5 to 10 kt, becoming W after midnight. Seas 2 to 4 ft. A chance of tstms in the evening. A chance of showers.
Sun..W winds 5 to 10 kt. Seas 2 to 3 ft, subsiding to 1 to 2 ft in the afternoon.
Sun night..W winds 5 to 10 kt. Seas 1 to 2 ft.
Mon..W winds 5 to 10 kt. Seas 1 to 2 ft.
Mon night..SW winds around 5 kt. Seas 1 to 2 ft.
Tue..SW winds 5 to 10 kt. Seas 1 to 2 ft.
Tue night..S winds around 10 kt. Seas 2 to 3 ft. A chance of showers. Winds and seas higher in and near tstms.
ANZ100 305 Pm Edt Thu Aug 17 2017
Synopsis for stonington me to merrimack river ma out to 25 nm.. A warm front will approach from the southwest tonight and Friday and will gradually push east of the region Friday night. A slow moving cold front will cross the region Saturday through Saturday night. High pressure will build in from the west Sunday through Monday and will slide offshore on Tuesday. A cold front will move in from the west Tuesday night and will cross the region on Wednesday. High pressure will build in behind the front Wednesday night through 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 171903
afdgyx
area forecast discussion
national weather service gray me
303 pm edt Thu aug 17 2017

Synopsis
A warm front will approach from the southwest tonight and
Friday and will gradually push east of the region Friday night.

A slow moving cold front will cross the region Saturday through
Saturday night. High pressure will build in from the west Sunday
through Monday and will slide offshore on Tuesday. A cold front
will move in from the west Tuesday night and will cross the
region on Wednesday. High pressure will build in behind the
front Wednesday night through Thursday.

Near term through tonight
Clouds will be on the increase overnight as a warm front
approaches from the southwest. Clouds will lower and thicken
after midnight and showers will push into new hampshire toward
daybreak. Low temperatures will range through the 50s across
most of the forecast area.

Short term Friday through Friday night
Rain will overspread the forecast area from west to east Friday
morning. Increasing onshore flow ahead of the warm front will
bring ocean stratus into a good portion of the forecast area in
the afternoon. Although instability will be on the increase to
the west of the forecast area during the afternoon... Extensive
marine layer will inhibit any convection across the region with
the possible exception of extreme southwest new hampshire where
a few cells may hold together long enough to produce a few
rumbles. Highs Friday will range from the mid 60s to mid 70s.

Warm front will gradually push east through the region Friday
night. Expect steadier rain to gradually taper to showers from
west to east overnight. Rainfall amounts will generally add up
to a half to three quarters of an inch across the region. Lows
will range from the mid 50s north to the mid 60s south.

Long term Saturday through Thursday
Precipitation associated with the warm front will be mainly east
of the region by Saturday morning... However humid air will
remain across the region during the day Saturday as a cold front
approaches from the west. Temperatures Saturday will warm from
the mid 70s in the mountains to the mid 80s across southern
areas under partly cloudy skies. This will allow scattered
showers and thunderstorms to develop Saturday afternoon with the
greatest threat over western maine... With somewhat of a lesser
threat across new hampshire.

The front will cross the region Saturday night with less humid
air expected during the day Sunday. High temps Sunday will again
range from the mid 70s to mid 80s. Temperatures will gradually
become warmer Monday and Tuesday as a ridge of high pressure
approaches the area and then moves offshore. By Tuesday... High
temps will be mainly in the 80s across the region with southern
new hampshire and extreme southwestern maine approaching 90.

A cold front will cross the region Wednesday or Wednesday night
bringing a threat of showers and thunderstorms. Fair weather
with cooler temperatures will follow the front for Thursday.

Aviation 18z Thursday through Tuesday
Short term...VFR tonight. Ifr lifr ceilings develop on Friday
and will persist through Friday night.

Long term... Some improvement expected Saturday morning with
MVFR to ifr conditions developing. However... Ifr conditions
are possible in afternoon thunderstorms.VFR conditions
expected Sunday through Tuesday with fog possible in the favored
valleys.

Marine
Short term... Continuing sca's for seas through 800 pm. High surf
advisory will also be continued through the same time period.

Long term... Sca's may be needed on the outer waters Saturday
into Sunday... Otherwise winds and seas expected to be below sca
criteria.

Gyx watches warnings advisories
Me... High surf advisory until 8 pm edt this evening for mez025>027.

Nh... None.

Marine... Small craft advisory for hazardous seas until 8 pm edt this
evening for anz150-152.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CASM1 - 8418150 - Portland, ME 3 mi44 min 80°F 60°F1013.9 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 12 mi84 min SW 1.9 G 3.9 70°F 65°F2 ft1014.6 hPa (-1.3)55°F
WEXM1 - Wells Reserve, ME 25 mi74 min W 5.1 80°F 52°F
WELM1 - 8419317 - Wells, ME 27 mi44 min WNW 13 G 18 78°F 61°F1014.7 hPa
44030 - Buoy B0102 - Western Maine Shelf 33 mi70 min WNW 7.8 G 12 71°F 65°F3 ft1015 hPa

Wind History for Wells, ME
(wind in knots)    EDIT      (on/off)   Help
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G13
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G16

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Portland, Portland International Jetport, ME1 mi23 minNW 810.00 miPartly Cloudy82°F48°F32%1013.9 hPa

Wind History from PWM (wind in knots)
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Last 24hrNW9
G18
NW11NW10N1055NW6CalmNW4W4W3W4W3W5W4W3SW4SW5W7NW105
G17
W8N5NW8
1 day agoS9S9S11S10
G20
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CalmS3CalmSW4CalmW3W5W5W3W4W4NW5NW8NW7NW13W14
G17
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2 days agoS9S9S7S8S6S7S5SW4SW4S3SW3CalmCalmW3CalmCalmCalmSW45SW9
G15
S10
G16
S9S9S11

Tide / Current Tables for Fore River, Maine
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Fore River
Click for Map
Thu -- 01:11 AM EDT     -0.01 feet Low Tide
Thu -- 01:16 AM EDT     Moonrise
Thu -- 05:48 AM EDT     Sunrise
Thu -- 07:26 AM EDT     8.99 feet High Tide
Thu -- 01:27 PM EDT     0.51 feet Low Tide
Thu -- 04:23 PM EDT     Moonset
Thu -- 07:41 PM EDT     Sunset
Thu -- 07:48 PM EDT     10.38 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.800.31.73.86.188.98.87.85.93.71.70.60.71.83.86.48.61010.49.67.85.3

Tide / Current Tables for Cow Island, Maine
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Cow Island
Click for Map
Thu -- 01:09 AM EDT     -0.01 feet Low Tide
Thu -- 01:15 AM EDT     Moonrise
Thu -- 05:47 AM EDT     Sunrise
Thu -- 07:23 AM EDT     8.99 feet High Tide
Thu -- 01:25 PM EDT     0.51 feet Low Tide
Thu -- 04:22 PM EDT     Moonset
Thu -- 07:40 PM EDT     Sunset
Thu -- 07:45 PM EDT     10.38 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.800.41.83.96.288.98.87.75.83.61.60.60.71.93.96.58.710.110.39.57.75.2

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 (15,3,4,5)
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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.