Monday, May29, 2017 L-36.com


Marine Weather and Tides
South Portland, ME

Version 3.4
What's New / NOTES
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 5:01AMSunset 8:15PM Monday May 29, 2017 7:21 AM EDT (11:21 UTC) Moonrise 9:11AMMoonset 11:59PM Illumination 16% Phase: Waxing Crescent; Moon at 4 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- 628 Am Edt Mon May 29 2017
Today..E winds 5 to 15 kt...becoming 10 to 15 kt this afternoon. Seas 2 to 3 ft. Patchy fog this morning. Showers likely this afternoon. Vsby 1 to 3 nm this morning.
Tonight..E winds 5 to 10 kt. Seas around 2 ft. Showers likely in the evening...then a chance of showers with patchy drizzle after midnight. Patchy fog after midnight with vsby 1 to 3 nm.
Tue..SE winds 5 to 10 kt. Seas 2 to 3 ft. Patchy fog in the morning. Patchy drizzle in the morning...then a chance of showers in the afternoon. Vsby 1 to 3 nm in the morning.
Tue night..S winds 5 to 10 kt. Seas 2 to 4 ft. Showers likely.
Wed..S winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers.
Wed night..SW winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers in the evening.
Thu..W winds 5 to 10 kt. Seas 2 to 3 ft.
Thu night..W winds 5 to 10 kt. Seas 2 to 3 ft.
Fri..SW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers.
Fri night..SW winds 5 to 10 kt. Seas 2 to 4 ft.
ANZ100 628 Am Edt Mon May 29 2017
Synopsis for stonington me to merrimack river ma out to 25 nm.. A trough will cross the waters today into Tuesday...bringing a period of showers. Low pressure will sit to our north through the rest of next week...with southerly and then predominantly westerly flow.

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 291028
afdgyx
area forecast discussion
national weather service gray me
628 am edt Mon may 29 2017

Synopsis
Low pressure centered north of the great lakes will push an
occluded front eastward across new england through Tuesday. This
front and an onshore flow will produce cool unsettled weather
with showers from time to time along with areas of drizzle and
fog. Warmer weather returns for the second half of the work
week, but with the chance of showers each day.

Near term until 6 pm this evening
625 am... Minor estf update to ingest the current mesonet into
near term grids.

Prev disc...

at 06z... A 1000 millibar low was over the upper great lakes with
associated warm front through the mid atlantic region and a
trailing cold front through the mississippi valley. GOES water
vapor showed an upper low vicinity of lake superior and a
shortwave impulse upstream of the forecast area over the upper
mississippi valley racing northeastward. NWS doppler radar
mosaic showed an area of broken convection stretching from the
eastern great lakes through the mid atlantic region. For
today... The warm front will lift slowly northward into new
england while the shortwave impulse races northeast across the
forecast area this afternoon and evening. The band of showers
will lift northeast and cross the area during the afternoon and
early evening. Otherwise... A mostly cloudy day with onshore flow
contributing some patchy drizzle and fog mainly along the
coastal plain. Today will be chilly by late may standards with
high temperatures limited to the 50s.

Short term 6 pm this evening through 6 pm Tuesday
Shower activity will trail off tonight as the weakening
shortwave impulse exits into the maritimes by late evening.

We're left with the persistent onshore flow with widespread
stratus and fog along with patchy drizzle for the remainder of
the overnight period as the warm front remains hung up to our
south and west. Lows tonight will be in the 40s. On
Tuesday... The occluding frontal system remains to our south and
west with onshore flow continuing. Another weak shortwave
impulse will ride northeast and bring another round of more
widespread showers during the afternoon. Otherwise... Mostly
cloudy and cool with some patchy drizzle and fog in the onshore
flow. Highs tomorrow will range from the upper 50s to lower 60s.

Long term Tuesday night through Sunday
Overall the global models are in pretty good agreement with the
continued blocky pattern through Thursday. It is after this
point that the GFS and euro begin to have very different
solutions for the extended mainly concerning how to deal with
the east coast closed low. Looking at long term blocking indices
and hovmoller plots, the blocking pattern should start to break
up around day 10 (6 8).

Around mid week the large cyclone on the east side of the rex
block which has been affecting our weather will shift east, closer
to central quebec province but still to our west. The low takes
on a negative tilt allowing a series of basal short waves to
affect northern new england more directly. With the atmospheric
river in place rich moisture still being pumped north from the
tropics, this results in several rounds of showers and
thunderstorms this week with at least a couple moderately strong
frontal passages. The mountains will be closest to quasi-
stationary forcing and this combined with orographic effects
will keep clouds and rain showers in the forecast for northern
zones for much of the time.

The rainiest periods look like Wednesday and again Saturday.

There will be chances for more organized convection with thunder
given the strength of the cold pool aloft and especially if the
timing of frontal passages is favorable for peak heating. In
particular Wednesday and perhaps Friday look possible for
thunderstorms.

Overnight lows this week will generally be in the upper 40s to
mid 50s, or slightly above normal. Highs will be in the 60s and
70s with some warmer spots possible over southern and interior
sections in westerly flow and also those times when the Sun is
able to break through the clouds.

Aviation 12z Monday through Friday
Short term through Tuesday ... MVFR in shra with areas of ifr
along the coastal plain in drizzle and fog throughout the period.

Long term... Rainy conditions with MVFR or lower ceilings and low
visibilities especially overnight and in the morning are
expected Wednesday Friday. Fog may be a concern Thursday
morning.

Marine
Short term through Tuesday ... Quiet on the waters with winds
and seas below sca. However... We will see vsby restrictions on
the water in showers and fog.

Long term... The next chance of SCA conditions for gusty winds
and increasing seas may occur Friday into Saturday as a strong
cold front crosses the waters.

Tides coastal flooding
The astronomical high tide in portland is 11.1 feet mllw at
3:08 am Tuesday. Last night's tide was about 0.6 feet above
predicted levels. With winds and seas virtually unchanged, we
may be issuing something for tonight's tide later today as water
conditions may exceed their minimal benchmark levels to produce
isolated minor flooding.

Gyx watches warnings advisories
Me... None.

Nh... None.

Marine... None.

Es


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CASM1 - 8418150 - Portland, ME 3 mi51 min 47°F 49°F1018.5 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 12 mi91 min SE 12 G 14 47°F 49°F3 ft1017.8 hPa (+1.5)46°F
WEXM1 - Wells Reserve, ME 25 mi81 min SE 2.9 50°F 49°F
WELM1 - 8419317 - Wells, ME 27 mi51 min SE 7 G 8 50°F 1017.8 hPa
44030 - Buoy B0102 - Western Maine Shelf 33 mi77 min SE 9.7 G 14 50°F 51°F3 ft1017.3 hPa

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Portland, Portland International Jetport, ME1 mi30 minSE 12 G 161.50 miFog/Mist48°F46°F93%1018.4 hPa

Wind History from PWM (wind in knots)
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Last 24hrS4S5S6SE9S8S116
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1 day agoN7NE9
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6N10NE10E7E9SE9S10S8S11S8S6S4SW5SW3S3CalmCalmSE3CalmCalmCalmCalm
2 days agoNE16
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6N7NW4N5N45NE8N5W3W3NW6NW4

Tide / Current Tables for Fore River, Maine
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Fore River
Click for Map
Mon -- 02:12 AM EDT     11.57 feet High Tide
Mon -- 05:04 AM EDT     Sunrise
Mon -- 08:39 AM EDT     -1.54 feet Low Tide
Mon -- 09:10 AM EDT     Moonrise
Mon -- 02:58 PM EDT     10.21 feet High Tide
Mon -- 08:13 PM EDT     Sunset
Mon -- 08:55 PM EDT     -0.10 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.310.611.511.19.46.63.30.4-1.2-1.5-0.32.15.17.89.610.29.57.752.30.5-0.10.72.6

Tide / Current Tables for Cow Island, Maine
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Cow Island
Click for Map
Mon -- 02:09 AM EDT     11.57 feet High Tide
Mon -- 05:03 AM EDT     Sunrise
Mon -- 08:37 AM EDT     -1.54 feet Low Tide
Mon -- 09:10 AM EDT     Moonrise
Mon -- 02:55 PM EDT     10.21 feet High Tide
Mon -- 08:13 PM EDT     Sunset
Mon -- 08:53 PM EDT     -0.10 feet Low Tide
Mon -- 11:58 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.410.611.611.19.36.43.10.3-1.3-1.4-0.22.25.27.99.710.29.57.64.92.20.4-0.10.72.7

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 (7,2,3,4)
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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.