Marine Weather and Tides
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 7:06AM||Sunset 4:35PM||Friday January 19, 2018 6:19 AM EST (11:19 UTC)||Moonrise 9:35AM||Moonset 8:11PM||Illumination 7%|
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|ANZ153 Casco Bay- 409 Am Est Fri Jan 19 2018 |
.small craft advisory in effect from Saturday morning through Saturday afternoon...
Today..NW winds around 5 kt, becoming sw this afternoon. Seas 1 to 2 ft. A slight chance of snow showers this morning with vsby 1 to 3 nm.
Tonight..SW winds 5 to 10 kt, increasing to 10 to 20 kt after midnight. Seas 1 to 2 ft, building to 2 to 3 ft after midnight.
Sat..SW winds 10 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Sat night..W winds 5 to 10 kt. Seas 2 to 3 ft, subsiding to 1 to 2 ft after midnight.
Sun..W winds around 5 kt. Seas 1 foot or less.
Sun night..N winds 5 to 10 kt. Seas 1 foot or less.
Mon..NE winds 5 to 10 kt. Seas around 2 ft.
Mon night..SE winds 5 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. Snow and sleet likely.
Tue..S winds 10 to 15 kt with gusts up to 25 kt. Seas 4 to 7 ft. Rain.
Tue night..SW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of rain and snow showers.
|ANZ100 409 Am Est Fri Jan 19 2018 |
Synopsis for stonington me to merrimack river ma out to 25 nm.. A weak trough of low pressure will pass overhead early today. Low pressure will pass to the north of the waters Saturday with high pressure gradually building in thereafter. Low pressure approaches from the west Monday night and crosses the waters Tuesday and Tuesday night.
7 Day Forecast for Marine Location Near Brunswick Station, MEHourly EDIT Help
Area Discussion for - Gray/Portland, ME  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 kgyx 190950|
area forecast discussion
national weather service gray me
450 am est Fri jan 19 2018
A weak front will lift northeast across the area early today
with clouds and a few snow showers. A milder flow and above
normal temperatures follow for the upcoming weekend. A storm
system moving into the great lakes will bring wintry
precipitation Monday into Tuesday with temperatures warming. A
cold front Tuesday night brings colder air back into the region.
Near term until 6 pm this evening
forecast update was to increase the chance of snow showers for
the line of precipitation. This area of snow showers will exit
new hampshire and enter western maine early this morning. Some
of this precipitation is not reaching the ground.
a short wave will cross the region this morning.
This system is relatively moisture starved, however there could
be a brief period of scattered snow showers across central and
northern portions of the region this morning. The chance for
snow showers will continue into the afternoon across the far
north as a broad area of warm air advection develops in the
We will be beginning a gradual warming trend. Expect high
temperatures to mainly be in the 30s in the central and southern
portions of the region this afternoon, with 20s in the far
Short term 6 pm this evening through 6 pm Saturday
Low pressure will pass to our north tonight, limiting any
scattered snow showers to the far north. Warm air advection
during the overnight hours will lead to a non-diurnal
temperature trend with temperatures warming late at night. The
morning will be followed by a weak cold front and modest cold
air advection. Nevertheless, expect some melting to occur with
readings in the 30s in the north to the 40s in the south.
There will be a continued threat for scattered snow showers in
the mountains. This will mainly be across the northwest facing
upslope regions of the higher terrain.
Long term Saturday night through Thursday
Well, if it hasn't been advertised here yet, the persistent
western ridge eastern trough pattern that we've been stuck in
for about the past 5 weeks is in the process of breaking down.
December was 4.5 degrees above normal in las vegas and 5.5 below
normal in portland, illustrating the pattern that has been in
place with few brief exceptions for much of the winter now.
This, however, is changing. A trough is moving onshore into
southern california and will track generally east northeastward
across the country and arrive in new england early next week.
Behind it a more zonal, or at least much less amplified, flow is
expected for much of the rest of the month, transporting
pacific air into north america with more quickly moving ridges
and troughs. Meanwhile a cold pool of air lingers over hudson
bay and northeast canada, close enough that occasional colder
surges into new england are still possible.
Ahead of the southwest trough, a broad ridge will build over the
central and eastern parts of north america, with warmth from
the desert southwest being transported northeastward into the
midwest. Temperatures in the southwest deserts have been in the
70s, even warmer than tropical florida! As the trough moves out
onto the great plains this weekend it will pull in rich moisture
from the gulf of mexico. That warm, moist air will condense
into precipitation over the midwest as it moves into the colder
northern latitudes. The trough moves into the great lakes early
next week with the downstream warmth moving into the northeast.
By the time it arrives here it will be significantly modified.
In fact, just how much of this warm air we eventually feel at
ground level in eastern new england is highly in doubt as it may
just advect in above a colder layer of air stuck near the
ground leaving the low levels inverted. This could be a problem
as precipitation moves in. After the trough axis eventually
moves across new england we will see some of that cold air over
eastern canada pulled south behind the trough, lingering with
us through the end of the week.
As for the details of the daily forecast, we start here with
Sunday. The trough that moves through quebec Saturday will
slide a cold front southward into northern new england Saturday
night into Sunday. Ahead of the front, a westerly flow will keep
mild air and downsloping conditions over the coastal plain,
leading to temperatures in the 40s. But as the day GOES on the
colder air will be bleeding in from the north with the front
settling into southern new england by Monday morning. The core
of the cold air will be over quebec and northern maine with a
northeast flow keeping this locked into eastern new england for|
Monday in spite of the ridge building aloft ahead of the
approaching trough. Expect temperatures near or below freezing
for highs with the low level flow becoming southeasterly as the
surface high moves into eastern maine and new brunswick.
It looks like quite a complex forecast Monday night into
Tuesday. Models not in full agreement on the timing of the
trough moving through the great lakes. The GFS is about 6 to 12
hours faster than the ecmwf, with the GFS lifting a warm front
into central new hampshire and the foothills of maine with a
newly forming secondary surface low forming and tracking
eastward along it. The ECMWF however holds the trough back a
little bit later, with the previously mentioned cold front
pushing further south into southern new england before lifting
north to a stationary position over southern new hampshire
merging with a coastal front along the maine coastline. The
great lakes low then pinches off with the new low forming along
this warm front right along the maine coastline. With this track
the developing surface low along the coast is deep enough to
keep enough cold air in for a longer duration of snowfall at
more locations. The ECMWF has some support from the cmc and
also follows a more climatologically favored path, thus I am
inclined to believe the ECMWF a bit more than the gfs, though
the current forecast does represent at least somewhat of a blend
between the two. Even the GFS has some kinks in the isobars
suggesting cold air damming will play more of a role than the
model itself suggests.
Current thinking is that there will be a period of light snow
Monday night into Tuesday morning followed by another round of
precipitation during the day on Tuesday. As the second round of
precipitation arrives, it may fall as freezing rain for a good
portion of central new hampshire and the coastal plain of maine,
while temperatures along the immediate coast and southern new
hampshire warm into the 40s with rainfall. Further inland in the
mountainous areas there is a better chance that precipitation
stays as snow. Seeing as this is day 5 of the current forecast,
the gridded forecast is necessarily broad and includes multiple
precipitation types possible, though not all may be observed.
The best chance of icing is within our typical icing corridor
from about fryeburg to augusta.
As the low departs Tuesday night a cold front will push across
the area. It may take until Wednesday for the colder air to
really be felt as we will not be all that warm in the "warm
sector" ahead of the front Tuesday in most areas. Expect some
lingering snow showers in the mountains, but have also included
some low chances for light snow even toward the coastal plain as
the remnant occluded low and upper trough move near the area.
Have been surprised by enough of these light snows in the wake
of deeper passing lows this season to avoid going full nil for
pop on the coastal plain in this situation.
Cold high pressure builds in for Thursday and especially
Thursday night. Expect highs in the 20s, with lows falling into
the single digits and teens (near zero in colder northern
spots), a few degrees below normal.
Aviation 10z Friday through Tuesday
Short term... MainlyVFR conditions across the region, however
northernmost regions such as hie will likely have a period of
Long term... May see some MVFR or ifr ceilings moving in Saturday
night into Sunday north of the mountains as a cold front drops
in from the north. Expect increasing clouds area wide on Monday
with ceilings lowering to ifr Monday night into Tuesday with
light snow arriving. Snow changes to a wintry mix for much of
the area on Tuesday.
Short term... Winds and seas will increase late tonight and
Saturday. There will be a period of scas, especially out over
the outer waters. Winds may approach gales, but confidence is
not high enough to run with that headline at this time.
Long term... As the next trough low move through on Tuesday,
winds ahead of it could reach gale force. Colder air moves in
behind a cold front Tuesday night into Wednesday with winds
likely at least warranting a small craft advisory if not another
period of gales.
River flood warning for the kennebec continues as the river
fluctuates near flood stage because of tidal influence near the
Gyx watches warnings advisories
Marine... Small craft advisory from 6 am to 6 pm est Saturday for anz153.
Small craft advisory from 1 am to 6 pm est Saturday for
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
|Stations||Dist||Age||Wind||Air Temp||Water Temp||Waves||Pressure||DewPt|
|CASM1 - 8418150 - Portland, ME||21 mi||50 min||22°F||34°F||1013 hPa|
|44007 - PORTLAND 12 NM Southeast of Portland,ME||23 mi||90 min||WNW 7.8 G 9.7||25°F||36°F||2 ft||1012.9 hPa (+0.6)||21°F|
|WEXM1 - Wells Reserve, ME||47 mi||80 min||WNW 1.9||20°F||15°F|
|WELM1 - 8419317 - Wells, ME||48 mi||50 min||NW 5.1 G 6||20°F||35°F||1013.3 hPa|
Wind History for Wells, ME(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Wiscasset Airport, ME||15 mi||27 min||N 0||10.00 mi||Mostly Cloudy||13°F||10°F||92%||1013.4 hPa|
|Portland, Portland International Jetport, ME||24 mi||29 min||W 4||10.00 mi||Overcast||18°F||14°F||84%||1013.4 hPa|
Wind History from IWI (wind in knots)
|1 day ago||Calm||Calm||Calm||N||N||Calm||NE||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm|
|2 days ago||Calm||Calm||Calm||Calm||S||SW||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Cundy Harbor |
Click for Map
Fri -- 12:19 AM EST 8.47 feet High Tide
Fri -- 06:08 AM EST 0.76 feet Low Tide
Fri -- 07:08 AM EST Sunrise
Fri -- 08:34 AM EST Moonrise
Fri -- 12:21 PM EST 9.46 feet High Tide
Fri -- 04:33 PM EST Sunset
Fri -- 06:39 PM EST -0.05 feet Low Tide
Fri -- 07:11 PM EST Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Upper Hell Gate (Sasanoa River |
Click for Map
Fri -- 12:55 AM EST 0.86 knots Max Flood
Fri -- 05:02 AM EST -0.00 knots Slack
Fri -- 06:56 AM EST -0.74 knots Max Ebb
Fri -- 07:07 AM EST Sunrise
Fri -- 08:34 AM EST Moonrise
Fri -- 10:08 AM EST 0.00 knots Slack
Fri -- 01:03 PM EST 0.94 knots Max Flood
Fri -- 04:32 PM EST Sunset
Fri -- 05:07 PM EST -0.00 knots Slack
Fri -- 07:10 PM EST Moonset
Fri -- 07:20 PM EST -0.97 knots Max Ebb
Fri -- 10:56 PM EST 0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  Help
|Weather Map ||IR Satellite Image from GEOS|
GOES Local Image of Northeast EDIT
Wind Forecast for Gray/Portland, ME (6,6,7,8)(on/off)  Help
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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.