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 7:04AM||Sunset 5:43PM||Monday October 23, 2017 8:19 PM EDT (00:19 UTC)||Moonrise 10:34AM||Moonset 8:25PM||Illumination 15%|
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|ANZ153 Casco Bay- 715 Pm Edt Mon Oct 23 2017 |
.small craft advisory in effect from Tuesday morning through Tuesday evening...
Tonight..S winds 5 to 10 kt, increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 1 to 2 ft, building to 2 to 3 ft after midnight. Areas of fog. Areas of drizzle after midnight. Vsby 1 to 3 nm.
Tue..S winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. Areas of drizzle in the morning, then a chance of showers in the afternoon. Areas of fog in the morning, then patchy fog in the afternoon. Vsby 1 to 3 nm.
Tue night..S winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 7 ft. Patchy fog in the evening. A chance of showers in the evening, then rain with a chance of tstms after midnight. Some tstms may produce gusty winds, and heavy rainfall after midnight. Vsby 1 to 3 nm.
Wed..S winds 15 to 20 kt, becoming 10 to 20 kt in the afternoon. Gusts up to 30 kt. Seas 4 to 7 ft. Rain with a chance of tstms in the morning, then rain in the afternoon. Some tstms may produce gusty winds, and heavy rainfall in the morning. Vsby 1 to 3 nm.
Wed night..S winds 10 to 15 kt with gusts up to 20 kt, diminishing to 5 to 10 kt after midnight. Seas 4 to 6 ft. Rain in the evening, then showers likely after midnight. Patchy fog. Vsby 1 to 3 nm.
Thu..SW winds 5 to 10 kt. Seas 3 to 5 ft. Patchy fog in the morning. Showers likely, mainly in the morning with vsby 1 to 3 nm.
Thu night..W winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers.
Fri..SW winds 5 to 10 kt. Seas 2 to 4 ft.
Fri night..S winds around 5 kt. Seas 2 to 3 ft.
Sat..S winds 5 to 10 kt. Seas 2 to 3 ft.
Sat night..SE winds 5 to 10 kt. Seas 2 to 3 ft. A chance of showers. Winds and seas higher in and near tstms.
|ANZ100 715 Pm Edt Mon Oct 23 2017 |
Synopsis for stonington me to merrimack river ma out to 25 nm.. A southerly flow will develop over the next couple of days between departing high pressure and a slow moving cold front approaching from the west. South winds will be the strongest Tuesday night and Wednesday when gales will be possible. The front moves offshore Thursday with high pressure building in for Friday and Saturday.
7 Day Forecast for Marine Location Near Freeport, MEHourly EDIT Help
Area Discussion for - Gray/Portland, ME  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 kgyx 232324|
area forecast discussion
national weather service gray me
724 pm edt Mon oct 23 2017
High pressure will push east of the gulf of maine
tonight allowing a slow moving cold front will approach from the
west overnight and Tuesday. The front will slowly cross the region
Wednesday through Thursday. A ridge of high pressure will build over
the region on Friday and will shift offshore on Saturday before the
next low pressure system approaches from the southwest late in the
Near term until 6 am Tuesday morning
715 pm update: low clouds have once again moved onshore along
the me nh coast and parts of interior southeast nh. With the very
moist southeast low level flow, expecting fog and drizzle to
gradually develop,m m,ove further inland and overspread much of
southern and central areas of the forecast area. Input latest
some clouds continue to move into SRN nh from the south,a and
coastal stratus also continues to build up just offshore, but
heating is holding it there for now. The coastal stratus should
start moving inland during the late afternoon and early evening,
with clouds streaming in from the south and and west, and
clouding up most places by midnight. Lots of moisture will
stream in over the overnight inversion, so look for dz to
develop, especially in SE upslope areas. Thinking that large
scale forcing will likely hold off until Tuesday, so for the
most part look for dz fg tonight. Temps will fall off a bit this
evening, but will likely start to rise after midnight, with
temps mostly in the mid to upper 50s.
Short term 6 am Tuesday morning through 6 pm Tuesday
500 mb closed low over the great lakes will move very slowly ne
on Tue and will see several a couple waves of energy move
through it, which will help it go thru two cycles of deepening,
which will keep sfc low and associated cold front over the great
lakes and ny on tue, with just some sct shra, and perhaps some
continued spotty dz thru the day on tue. Could see more
organized showers in the upslope areas of the whites tue
afternoon, but still nothing heavy until Tue night. Highs will
rise on increasing s-se winds into the 60s. Mid to upper 60s
are expected in the ct valley, SRN nh and SW me, with low to mid
60s in central me and the mid-coast. Dew points will also climb
into 60-65 range during the day, so it will start to feel humid
as well. Also those S winds will increase, and could see gusts
of 25-30 mph in the afternoon, especially on the coast and
across the hilltops.
Tue night will see the closed low over the great lakes to start
making a little better progress to the ne, but it will still be
a slow go. This will push the sfc front ewd into nh after
midnight. Ahead of the front, expecting a line of convection to
form as strong low level jet will be in place just ahead of the
front. With the deep moisture ahead of the front, this
convection will produce heavy rain, and the possibility of tsra.
Any tsra could also help mix down the winds from the jet, and
good see some gusts approaching severe levels. Currently, this
line should be somewhere in the vicinity of the nh me border
around daybreak on wed, and will continue across me Wed morning.
This line will likely be responsible for a large part of the
rain that falls and could produce an inch to inch and a half in
Long term Tuesday night through Monday
A more active weather pattern is expected in the extended with
significant precipitation early and again late in the period.
In between expect a few more nice weather days.
On Wednesday a pronounced cold front will approach the area. Ahead
of the front sub tropical moisture will stream north over the
region. In addition there are indications of a wave forming on the
front. This would slow the eastward speed of the front and
potentially prolong rainfall especially over eastern areas. Until
the front crosses the air mass remains unstable and could support
embedded thunder storms. Will include the chance of this through the
day on Wednesday.
The front will push east of the area late Wednesday night over w
eastern areas and early on Thursday over eastern areas. A cyclonic
flow aloft as well as a cold pool aloft will help support showers on|
Thursday. Rainfall amounts will be challenging. With subtropical
moisture involved and a slow moving pattern would favor significant
rainfall. On the other hand... Models maybe somewhat overdone due to
convective elements embedded that models are trying to resolve.
A short wave ridge will build over the region Friday into Saturday.
Allowing for drying and pleasant conditions. Low pressure and an
associated cold front will approach from the great lakes Saturday
night and Sunday. A secondary low may form along this front off the
southeast coast. This scenario would increase the threat of a
soaking rain late Sunday and into Monday. The GFS is about 12 hours
faster than the ECMWF with this feature... So the timing of this
event is in flux.
Temperatures will remain at or above normal through the period with
the warmest temperatures expected on Saturday when widespread 60s
for highs are expected south of the mountains.
Aviation 23z Monday through Saturday
Short term... AnyVFR breaks today will end early this evening as
low clouds move onshore or develop in moist southerly flow above
the diurnal inversion. Most places will see lifr by after
midnight as fg dz will be added to the low clouds. Non-coastal
terminals will see improvement to ifr, and maybe MVFR for a bit
on tue. Coastal terminals will probably be stuck with lifr cigs
all day, although vis will improve at times. The only exception
will be khie, which will likely stayVFR in the southeast
downslope into Tue afternoon.
ifr to lifr conditions possible ahead of approaching cold
front Wednesday and Wednesday night. Rain with embedded
convection Wednesday with patchy fog Wednesday night. Winds
shift to west northwest Thursday resulting in improving
conditions.VFR conditions expected to return Friday and
Short term... Will hold the flags as they are for now. Sca
confidence is very high, and will likely begin early tue
morning. Gales are still a good bet, but timing is uncertain,
and they may only occur in a small time window late Tue night
into Wed morning. Seas will begin to push to around 10 ft by
early Wed morning.
Wednesday and into Thursday wind and waves at SCA levels and
possibly briefly reaching gale conditions in strengthening
southerly flow ahead of approaching cold front. Winds shift to
west northwest Thursday resulting in subsiding waves. &&
Overall, we are looking at 1-3" of rain across the area between
tue and thu, however, the bulk of the rain will fall Tue night
and wed. Still, with river levels running very low, mainstream
flooding is not expected. However, could see a lot of rain in a
short period time as a line of heavy showers and or
thunderstorms moves through late Tue night and Wed morning, and
this could lead to some poor drainage and minor urban flooding.
Tides coastal flooding
A slow moving cold front will provide a prolonged period of
onshore flow. Seas will build to 10-12 ft in onshore flow, but
mostly away from shore. While this is a descent wind wave, all
other factors for coastal flooding remain low. We are at an
astronomical low point in the tidal cycle with high tide at
portland in the 9ft range. Additionally all of the wave is in
the wind wave at around 8 seconds with no long period swell. The
low tide and short period means that even though there may be
around a foot of storm surge it will not be enough to cause
Gyx watches warnings advisories
Marine... Small craft advisory from 8 am to 8 pm edt Tuesday for
Gale watch from Tuesday evening through Wednesday evening for
Near term... Marine
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||14 mi||49 min||56°F||55°F||1023.3 hPa|
|44007 - PORTLAND 12 NM Southeast of Portland,ME||20 mi||89 min||SE 5.8 G 7.8||55°F||56°F||1 ft||1023.6 hPa (-1.0)||55°F|
|44032 - Buoy E0104 - Central Maine Shelf||40 mi||75 min||E 7.8 G 7.8||55°F||55°F||2 ft||1023.6 hPa|
|WEXM1 - Wells Reserve, ME||41 mi||79 min||ENE 1.9||56°F||56°F|
|WELM1 - 8419317 - Wells, ME||42 mi||49 min||E 2.9 G 4.1||56°F||55°F||1023.2 hPa|
|44030 - Buoy B0102 - Western Maine Shelf||47 mi||75 min||E 7.8 G 9.7||56°F||58°F||1 ft||1023.7 hPa|
Wind History for Wells, ME(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Portland, Portland International Jetport, ME||16 mi||28 min||SE 9||1.50 mi||Fog/Mist||56°F||55°F||97%||1023.2 hPa|
|Auburn-Lewiston, ME||19 mi||23 min||SSE 5||10.00 mi||Overcast||56°F||54°F||93%||1024.8 hPa|
|Wiscasset Airport, ME||23 mi||26 min||N 0||2.00 mi||Fog/Mist||56°F||55°F||97%||1024 hPa|
Wind History from PWM (wind in knots)
|1 day ago||Calm||Calm||Calm||Calm||NE||E||E||SE||E||E||E||E||E||E||E|
|2 days ago||W||Calm||W||Calm||Calm||Calm||Calm||SW||Calm||SE||Calm||Calm||W||S||S||SE||SE||SE||SE|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|South Freeport |
Click for Map
Mon -- 02:09 AM EDT 9.03 feet High Tide
Mon -- 07:05 AM EDT Sunrise
Mon -- 08:04 AM EDT 0.95 feet Low Tide
Mon -- 10:33 AM EDT Moonrise
Mon -- 02:15 PM EDT 9.54 feet High Tide
Mon -- 05:43 PM EDT Sunset
Mon -- 08:25 PM EDT Moonset
Mon -- 08:34 PM EDT 0.33 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Upper Hell Gate (Sasanoa River |
Click for Map
Mon -- 02:28 AM EDT 0.87 knots Max Flood
Mon -- 06:32 AM EDT -0.00 knots Slack
Mon -- 07:04 AM EDT Sunrise
Mon -- 08:28 AM EDT -0.79 knots Max Ebb
Mon -- 10:32 AM EDT Moonrise
Mon -- 11:54 AM EDT 0.00 knots Slack
Mon -- 02:40 PM EDT 0.94 knots Max Flood
Mon -- 05:42 PM EDT Sunset
Mon -- 06:47 PM EDT -0.00 knots Slack
Mon -- 08:23 PM EDT Moonset
Mon -- 08:53 PM EDT -0.91 knots Max Ebb
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 (20,4,5,8)(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.