Sunday, August20, 2017 L-36.com


Marine Weather and Tides
Topsham, 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 5:49AMSunset 7:36PM Sunday August 20, 2017 5:12 PM EDT (21:12 UTC) Moonrise 4:20AMMoonset 7:00PM Illumination 2% 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- 302 Pm Edt Sun Aug 20 2017
Tonight..W winds 5 to 10 kt. Seas 1 to 2 ft.
Mon..SW winds 5 to 10 kt, becoming S 5 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 to 2 ft.
Mon night..SW winds 5 to 10 kt. Seas 1 to 2 ft.
Tue..SW winds 5 to 10 kt, becoming S 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 to 2 ft, building to 2 to 4 ft in the afternoon. A chance of showers in the afternoon.
Tue night..S winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 5 ft. A chance of tstms in the evening. A chance of showers.
Wed..SW winds 10 to 15 kt, diminishing to 5 to 10 kt in the afternoon. Seas 2 to 4 ft. A chance of showers.
Wed night..NW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers in the evening.
Thu..W winds around 5 kt. Seas 1 to 2 ft.
Thu night..NW winds up to 10 kt. Seas 1 to 2 ft.
Fri..NW winds 5 to 10 kt. Seas 1 to 2 ft.
Fri night..NW winds 5 to 10 kt. Seas 1 to 2 ft. Winds and seas higher in and near tstms.
ANZ100 302 Pm Edt Sun Aug 20 2017
Synopsis for stonington me to merrimack river ma out to 25 nm.. High pressure will build south of the waters through Monday before pushing well offshore to our south on Tuesday. A cold front will cross the waters on Wednesday before high pressure builds back over the waters for the end of the week.

7 Day Forecast for Marine Location Near Topsham, ME
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location: 43.92, -69.96     debug


Area Discussion for - Gray/Portland, ME
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Fxus61 kgyx 201901
afdgyx
area forecast discussion
national weather service gray me
301 pm edt Sun aug 20 2017

Synopsis
High pressure will build to the south of the region through
Monday before sliding to the east on Tuesday. A cold front will
move in from the west Tuesday night and cross the region on
Wednesday. High pressure and drier air follows the front Wednesday
night through Friday.

Near term until 6 am Monday
At 18z... A 1022 millibar high was centered over pennsylvania.

The upper trough was exiting the coast along with a few widely
scattered showers. Clouds on visible imagery will begin to
dissipate next few hours with loss of daytime heating.

Overnight... Mostly clear skies with patchy fog as high pressure
builds to our south overnight. A cool and comfortable late
summer night with lows in the 50s and lower 60s.

Short term 6 am Monday through Monday night
On Monday... High pressure builds by to our south with westerly
flow ushering warmer and gradually more humid air into the
area. Outside of a few fair weather cumulus clouds developing in
daytime heating... A sunny day with highs mainly in the 80s. A
few locations in southeast new hampshire could flirt with the 90
degree mark. Partly cloudy Monday night with a few warm air
advection clouds. There could be a brief shower near the
international border in the predawn hours of Tuesday.

Otherwise... A dry night with patchy valley fog developing
overnight.

Long term Tuesday through Sunday
After zonal flow aloft starts off the week a deep trough will
dive southwards out of the northwest territories moving into the
region by Wednesday. The trough will linger over the region
through the end of the week weakening as it does.

Tuesday will be very warm and humid. Deep southerly flow around
a bermuda high will push warm moist air into the region. High
temperatures will reach the low 90s in southern new hampshire
with dewpoints in the upper 60s, which will result in heat index
approaching 95 degrees. With the strength of the high pressure
have gone a bit higher on the temperatures for Tuesday.

A strong cold front will approach from the west Tuesday and move
through the region overnight. The front will cross western new
york in the afternoon, and move through new hampshire and
western maine overnight Tuesday into Wednesday. Due to the
overnight timing, expect thunderstorms to be mainly elevated and
decaying as it moves through our area, however the ct river
valley could see some stronger storms as the front approaches
earlier in the day.

On Wednesday the front will move off into eastern maine, with a
few showers possible in the eastern portion of the area in the
morning. By afternoon westerly flow will decrease humidity.

Moving into the end of the week the trough will remain overhead
keeping temperatures more seasonable with highs in the upper 70s
south to upper 60s north and lows in the 50s. Dry conditions
will continue through the start of next weekend.

Aviation 18z Sunday through Friday
Short term through Monday night ...VFR... With sct MVFR and lcl
ifr btw 08 - 12z Monday in valley fog. LCL ifr psb btw 08 and
12z Tue in valley fog.

Long term... Scattered thunderstorms will briefly reduce
conditions to ifr overnight Tuesday into Wednesday beforeVFR
continues through the end of the week.

Marine
Short term through Monday night ... Winds and seas are expected
to remain below small craft as surface high pressure builds by
to our south.

Long term... Southerly flow ahead of a cold front Tuesday into
Tuesday night will help the outer waters reach small craft
criteria.

Tides coastal flooding
We're in the period of high astronomical tides for the month of
august. The high tides of potential concern (referencing
portland harbor where flood stage is 12.0 ft mllw) are:
1047 pm tonight... 11.1 ft mllw
1140 pm Monday... . 11.2 ft mllw
1231 am Wednesday. 11.1 ft mllw
the Tuesday night high tide (1231 am Wednesday) could see some
splashover as onshore flow and seas increase ahead of an
approaching cold front.

Gyx watches warnings advisories
Me... None.

Nh... None.

Marine... None.

Synopsis... Schwibs
near term... Schwibs
short term... Schwibs
long term... Curtis
aviation... Schwibs
marine... Curtis schwibs

Tides coastal flooding Schwibs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CASM1 - 8418150 - Portland, ME 24 mi42 min 81°F 61°F1014.1 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 29 mi82 min NW 9.7 G 12 73°F 65°F2 ft1013.8 hPa (+1.2)57°F
44032 - Buoy E0104 - Central Maine Shelf 35 mi68 min SW 5.8 G 5.8 65°F 61°F2 ft1013 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
Wiscasset Airport, ME14 mi19 minVar 5 G 1510.00 miA Few Clouds79°F55°F44%1014.4 hPa
Auburn-Lewiston, ME20 mi16 minNW 1010.00 miMostly Cloudy78°F55°F45%1016.2 hPa

Wind History from IWI (wind in knots)
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Last 24hrS6SE4CalmCalmCalmCalmCalmSW3CalmSW3CalmCalmCalmCalmCalmSW3336--4565
G15
1 day agoE4E6E4NE6E6Calm4CalmCalmN3CalmCalmCalm333CalmCalmCalmW3CalmCalmS4S5
2 days ago53CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmE3CalmE6SE5E5E5

Tide / Current Tables for Brunswick, Androscoggin River, Kennebec River, Maine
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Brunswick
Click for Map
Sun -- 12:25 AM EDT     4.59 feet High Tide
Sun -- 04:20 AM EDT     Moonrise
Sun -- 05:49 AM EDT     Sunrise
Sun -- 08:52 AM EDT     -0.38 feet Low Tide
Sun -- 01:06 PM EDT     4.10 feet High Tide
Sun -- 06:59 PM EDT     Moonset
Sun -- 07:35 PM EDT     Sunset
Sun -- 09:05 PM EDT     -0.12 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.54.54.23.62.71.80.90.2-0.3-0.40.423.54.143.62.92.11.30.50.1-0.10.41.9

Tide / Current Tables for Upper Hell Gate (Sasanoa River, Maine) Current
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Upper Hell Gate (Sasanoa River
Click for Map
Sun -- 02:27 AM EDT     -0.00 knots Slack
Sun -- 04:20 AM EDT     Moonrise
Sun -- 04:41 AM EDT     -1.07 knots Max Ebb
Sun -- 05:49 AM EDT     Sunrise
Sun -- 08:30 AM EDT     0.00 knots Slack
Sun -- 11:33 AM EDT     1.04 knots Max Flood
Sun -- 03:00 PM EDT     -0.00 knots Slack
Sun -- 05:04 PM EDT     -0.94 knots Max Ebb
Sun -- 06:58 PM EDT     Moonset
Sun -- 07:34 PM EDT     Sunset
Sun -- 08:40 PM EDT     0.00 knots Slack
Sun -- 11:37 PM EDT     1.14 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
10.90.3-0.4-1-1.1-0.9-0.7-0.30.30.81110.70-0.7-0.9-0.8-0.6-0.30.20.81.1

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 (17,4,5,8)
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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.