Tuesday, June27, 2017 L-36.com


Marine Weather and Tides
Littlejohn Island, 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 4:58AMSunset 8:28PM Tuesday June 27, 2017 1:33 PM EDT (17:33 UTC) Moonrise 9:06AMMoonset 11:14PM Illumination 14% 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- 1146 Am Edt Tue Jun 27 2017
This afternoon..S winds around 5 kt, increasing to 5 to 10 kt. Seas 1 foot or less. A chance of showers with a slight chance of tstms. Some tstms may produce gusty winds, and small hail.
Tonight..S winds 5 to 10 kt, becoming sw after midnight. Seas 2 to 3 ft. A chance of showers. A chance of tstms. Some tstms may produce gusty winds, and small hail in the evening.
Wed..W winds 5 to 10 kt. Seas 1 to 2 ft.
Wed night..W winds 5 to 10 kt. Seas 1 to 2 ft.
Thu..SW winds 5 to 10 kt. Seas 1 to 2 ft. Showers likely in the afternoon.
Thu night..S winds 5 to 10 kt with gusts up to 20 kt. Seas 3 to 5 ft. Showers likely with a chance of tstms.
Fri..SW winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers.
Fri night..SW winds up to 10 kt. Seas 2 to 4 ft. A chance of showers.
Sat..S winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers.
Sat night..S winds 5 to 10 kt. Seas 3 to 5 ft. A chance of showers. Winds and seas higher in and near tstms.
ANZ100 1146 Am Edt Tue Jun 27 2017
Synopsis for stonington me to merrimack river ma out to 25 nm.. A cold front will move in from the west this afternoon with a chance of showers and Thunderstorms. A warm front will approach from the southwest on Thursday and move through the waters Thursday night. Another low pressure system will move to the west of the waters on Saturday.

7 Day Forecast for Marine Location Near Littlejohn Island, ME
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location: 43.78, -70.08     debug


Area Discussion for - Gray/Portland, ME
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Fxus61 kgyx 271552
afdgyx
area forecast discussion
national weather service gray me
1152 am edt Tue jun 27 2017

Synopsis
A cold front will approach from the west today and will likely
aid in the development of showers and thunderstorms, a few of
which may be strong to severe this afternoon. The front will
eventually move off the coast on Wednesday and will bring a few
showers. A warm front will approach on Thursday and bring
increasing chances of showers and thunderstorms during the
afternoon and nighttime hours. Another low pressure system may
affect the region on Saturday with more showers and
thunderstorms.

Near term until 6 pm this evening
Update...

products: main product suite has been updated to include the
expansion of the marginal risk area into far western maine this
afternoon and evening. Namely, the hwo, dss slide, social media
have been updated with updates to the grids and texts products.

An email activation has been sent to hams operators. Details
below.

Have updated the grids based on current conditions and latest
set of mesoscale models. Monitoring the threat for a few
isolated storms containing large hail today. Instability is not
overly impressive as plenty of cloud cover remains over much of
the forecast area. However, low freezing levels will lower even
further aloft this afternoon as a vigorous short waves passes
north and west of the region. This will steepen lapse rates even
further. SPC has expanded the marginal risk further to the north
and east into western maine which seams reasonable.

Onshore winds may prevent strong storms along the coastline.

Have worked up the soundings and coastal areas will likely
remain more stable than southern new hampshire due onshore
winds.

Otherwise, very little change to the main focus of the forecast.

Minor adjustments made to cloud cover, temperature and dew point
grids this morning.

Prev disc...

a few showers are moving into new hampshire early this morning
associated with a shortwave trough aloft. These are dying
showers, remnants of thunderstorms yesterday evening, and should
not cause much fanfare as they drift across the area. The
bigger story will be the next round arriving in the afternoon.

Potent shortwave trough crosses the region this afternoon,
adding synoptic scale lift to aid in the generation of afternoon
showers and thunderstorms. Although temperatures will be cool
(in the 70s) and dewpoints quite dry for the time of year (low
50s), instability today will be driven primarily from cold air
aloft associated with the upper trough. As such, the best
instability will exist further to the north and west beneath the
coldest air aloft, while the best shear will be to the south and
east beneath the core of the upper jet. There does look to be a
sweet spot between the two which will exist over our area this
afternoon, leading to the threat for some stronger, more
organized thunderstorms. This may include a few rotating
supercells as well as clusters of storms. Given the cold
temperatures aloft, expect hail to be the primary threat from
the storms today, but there may be a wind threat as well
especially with any storm clusters which can combine downdrafts.

Convective initiation will be most likely over vermont and new
hampshire where heating of the terrain beneath the upper cold
pool will occur near the time of the shortwave trough's arrival.

Further to the east, an onshore southerly flow across maine will
limit instability from portland to augusta and bangor, but some
remnant storms may move through these areas during the evening
as they push eastward and weaken.

Short term 6 pm this evening through 6 pm Wednesday
Expect an area of thunderstorms to be ongoing this evening,
possible organized into mesoscale convective clusters. These
will move east across the forecast area and diminish in
intensity as the evening progresses. Overnight temperatures will
drop into the 50s for most of the area.

Core of the upper cold pool moves across the area early on
Wednesday, and should provide enough instability for another
round of showers and possible thunderstorms. These will be most
likely across the north and east where the best forcing and cold
air aloft will exist during the period of best heating.

Long term Wednesday night through Monday
Deterministic models and ensembles remain in good agreement in
the long term period with two distinct rain chances centered
around late Thursday Thursday night and Saturday. The morning
hours on Thursday should turn out ok, but an approaching short
wave trough and sfc warm front will allow for rapidly increasing
chances for rain Thursday afternoon. Elevated instability will
increase Thursday night which will add to a thunder threat along
with the rain. That system moves off to the east on Friday, even
though there will still be a chance for a few showers and
thunderstorms. The next short wave trough approaches Saturday.

With a moist and unstable air mass in place, showers and
thunderstorms appear likely, mainly during the afternoon hours
and mainly in the mountains. We'll have to watch for further
short wave amplification Sunday which would prolong the chance
of showers and thunderstorms. At this time, Monday looks to be
fair with a cooler and drier air mass in place.

Aviation 16z Tuesday through Saturday
Short term... ExpectVFR conditions to prevail today with a
developing light southerly wind. Showers and thunderstorms are
likely in the afternoon, forming in new hampshire and
progressing eastward through the evening hours. Any areas that
get significant rainfall could have a potential for fog tonight.

More showers are possible on Wednesday, mainly in northern
areas.

Long term... Conditions deteriorate to MVFR or lower later
Thursday afternoon and especially at night in low clouds,
showers, and thunderstorms.VFR conditions are primarily
expected Friday, but a few showers and thunderstorms may lower
conditions at times, especially during the afternoon hours. More
showers and thunderstorms are expected Saturday with associated
locally lower conditions.

Marine
Short term... Light southerly flow expected over the waters
today, shifting to the west or southwest on Wednesday.

Long term... SCA conditions are likely Thursday night through
Friday night.

Gyx watches warnings advisories
Me... None.

Nh... None.

Marine... None.

Near term... Cannon
short term... Cannon
long term... Schwibs


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CASM1 - 8418150 - Portland, ME 12 mi46 min 69°F 53°F1014.8 hPa
44007 - PORTLAND 12 NM Southeast of Portland,ME 18 mi44 min S 7.8 G 9.7 58°F 55°F1 ft1014.7 hPa (-1.1)55°F
WEXM1 - Wells Reserve, ME 39 mi94 min SSE 1.9 68°F 58°F
44032 - Buoy E0104 - Central Maine Shelf 39 mi90 min SSW 3.9 G 3.9 60°F 58°F2 ft1015.3 hPa
WELM1 - 8419317 - Wells, ME 41 mi46 min SSE 8 G 9.9 62°F 54°F1015 hPa
44030 - Buoy B0102 - Western Maine Shelf 45 mi90 min SSE 5.8 G 5.8 60°F 57°F1 ft1015.3 hPa

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Portland, Portland International Jetport, ME15 mi43 minS 810.00 miLight Rain69°F54°F59%1014.8 hPa
Auburn-Lewiston, ME22 mi38 minSSW 910.00 miFair71°F54°F55%1014.6 hPa
Wiscasset Airport, ME23 mi41 minS 510.00 miFair70°F53°F55%1015.4 hPa

Wind History from PWM (wind in knots)
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Last 24hrW9
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W12W7NW7W6S6S5CalmCalmSW6W3CalmNW3SW3SW3SW3CalmS3S3SW4W5S75S8
1 day agoW14
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SW7S11S8S10S8S8S5W6NW4W4CalmW4CalmW5SW4W5W10W10W9W11W9NW10W9
2 days agoNW13NW10NW11
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W13NW10NW9W6W7W9W4W6W6W6W7W7W6W6W3W664W9W86

Tide / Current Tables for Chebeague Point, Great Chebeague Island, Maine
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Chebeague Point
Click for Map
Tue -- 01:51 AM EDT     11.38 feet High Tide
Tue -- 05:00 AM EDT     Sunrise
Tue -- 08:11 AM EDT     -1.46 feet Low Tide
Tue -- 09:06 AM EDT     Moonrise
Tue -- 02:35 PM EDT     10.16 feet High Tide
Tue -- 08:26 PM EDT     Sunset
Tue -- 08:28 PM EDT     -0.17 feet Low Tide
Tue -- 11:13 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
9.210.911.410.58.25.11.9-0.4-1.4-10.73.46.38.69.910.18.86.53.71.3-001.33.7

Tide / Current Tables for Upper Hell Gate (Sasanoa River, Maine) Current
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Upper Hell Gate (Sasanoa River
Click for Map
Tue -- 02:36 AM EDT     1.23 knots Max Flood
Tue -- 04:58 AM EDT     Sunrise
Tue -- 06:28 AM EDT     -0.00 knots Slack
Tue -- 08:47 AM EDT     -1.24 knots Max Ebb
Tue -- 09:05 AM EDT     Moonrise
Tue -- 12:32 PM EDT     0.00 knots Slack
Tue -- 03:18 PM EDT     1.15 knots Max Flood
Tue -- 07:08 PM EDT     -0.00 knots Slack
Tue -- 08:25 PM EDT     Sunset
Tue -- 09:11 PM EDT     -0.97 knots Max Ebb
Tue -- 11:12 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.10.71.21.21.10.90.4-0.4-1.1-1.2-1-0.7-0.30.30.91.11.110.70.1-0.6-1-0.9-0.6

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 (13,3,4,5)
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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.