Marine Weather and Tides
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 5:05AM||Sunset 8:17PM||Monday May 29, 2017 11:37 PM EDT (03:37 UTC)||Moonrise 9:13AM||Moonset 12:00AM||Illumination 21%|
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|ANZ154 Coastal Waters From Cape Elizabeth, Me To Merrimack River, Ma Out 25 Nm- 722 Pm Edt Mon May 29 2017 |
Tonight..E winds 10 to 15 kt with gusts up to 20 kt... Diminishing to 5 to 10 kt after midnight. Seas around 3 ft. Showers with patchy drizzle this evening...then areas of drizzle after midnight. Patchy fog this evening...then areas of fog after midnight. Vsby 1 to 3 nm.
Tue..SE winds 5 to 10 kt. Seas around 3 ft. Areas of drizzle in the morning. Areas of fog in the morning with vsby 1 to 3 nm.
Tue night..SE winds around 10 kt. Seas 2 to 4 ft. A chance of showers after midnight.
Wed..S winds 5 to 10 kt. Seas around 4 ft. A chance of showers.
Wed night..SW winds 5 to 10 kt. Seas 2 to 4 ft. A chance of showers in the evening.
Thu..W winds around 10 kt. Seas 2 to 4 ft.
Thu night..W winds around 10 kt. Seas 2 to 4 ft.
Fri..SW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft. A chance of showers.
Fri night..SW winds 10 to 15 kt with gusts up to 25 kt. Seas 3 to 5 ft. A chance of showers.
Sat..W winds around 10 kt. Seas 3 to 5 ft.
Sat night..W winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 4 ft.
|ANZ100 722 Pm Edt Mon May 29 2017 |
Synopsis for stonington me to merrimack river ma out to 25 nm.. Low pressure passes south of the waters tonight...a warm front crosses the waters on Tuesday....Followed by a cold front Wednesday night. Weak high pres builds to the south Thu and Fri next. Another cold front moves trough Fri night or Sat.
7 Day Forecast for Marine Location Near Sanford, MEHourly EDIT Help
Area Discussion for - Gray/Portland, ME  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 kgyx 300220|
area forecast discussion
national weather service gray me
1020 pm edt Mon may 29 2017
Moist onshore flow today and tonight will allow for cloudy skies
through tonight along with some showers and fog. High pressure
will slide offshore on Tuesday as a cold front approaches
Wednesday. A few thunderstorms, some possibly strong, may occur
Wednesday afternoon and evening. After that a return to some
unsettled weather could occur Friday.
Near term until 6 am Tuesday morning
10 pm update...
quick update to adjust pops wx temp and TD grids. Showers have
pretty much cleared the area with the exception of a few
lingering showers in northeast zones. Aside from a few
scattered showers in the far north just looking for patchy
drizzle... Mainly in coastal and southern zones. No other changes
700 pm update...
line of showers currently diminishing in coverage and intensity
as they exit eastern new hampshire early this evening. Expect
this area of showers to gradually dissipate as they shift into
eastern maine over the next 3 to 4 hours. In the wake of this
activity expect ceilings to lower with areas of fog and drizzle
developing through midnight. Temperatures will show little
change. Have updated pop grids and wx based on current radar
trends. Aside from a few temp TD tweaks no other changes planned
Previous discussion... Area of showers located between
weakening sfc low to our NW and developing coastal system to our
se located over much of nh this afternoon. Forcing will
continue to weaken thru the evening as coastal stengthens as it
moves away from, and this combined with fairly solid ridging to
our east will weaken the showers as they move into western and
central me. Currently the rain is having a tough crossing the
nh me border, but the showers should work in this evening,
although not expecting much in the way of qpf, less than a tenth
overall in me. In nh, the showers should move out early this
evening. Otherwise, look for dz to become a little more
widespread as the onshore flow weakens, but remains persistent,
and fog will develop further inland as well as low level
moisture begins to increase. The ct vly will likely be spared
much of the fg dz thanks to the downsloping from the SE flow.
All in all lows should be in the mid to upper 40s in most spots,
which is not that far off current temps in many spots, so not
much change in temps. In fact temps may start to creep up a bit
after midnight as they are forced up by increasing low level
Short term 6 am Tuesday morning through Tuesday night
It is tough to say Tuesday will be better than Monday as we
remain locked into onshore and will hang onto a lot of clouds,
especially on the coastal plain and in the foothills. Should see
some break in dz fg by mid-late morning as well. And, temps
will be a few degrees warmer with highs ranging form the low to
mid 60s in SRN nh and the ct vly to the mid to upper 50s on the
coast. Again, those areas N of the whites and in the ct vly will
see some breaks of Sun on Tuesday as well. Nest system will|
bring a chance of showers to nh in the afternoon, with some tsra
possible in the far WRN zones. The bulk of any showers will
hold off until evening across most of the cwa.
Tue night will see a warm front move through aloft and best
forcing holds to out N and w, which means best chc for any shra
will be skewed toward the N and W zones. Some thunder will be
possible in the evening. Winds will shift to SW behind the
front, but will likely not mix to the sfc, so will be stuck in
the marine lyr with low clouds and fog lingering Tue night.
Long term Wednesday through Monday
Not all that much change from the previous forecast here in the
extended. A cold front will approach the region on Wednesday. It
does look like there will be sufficient instability, shear, and
forcing to allow for some thunderstorms during the afternoon.
Some cams suggest a few bowing segments with strong wind
potential moving across the region, especially nh, during the
late afternoon and early evening hours. Will continue to watch
for this potential.
Thereafter the best chance of rainfall looks to be around Friday
with another low pressure system and cold front. Low pressure
main remain far enough to our south over the weekend to allow
for a mainly fair weather weekend, but will continue to watch
trends as some ensemble members do bring rain northward.
Aviation 02z Tuesday through Saturday
Short term... Ifr or lower conditions will continue through
tonight in fg dz and low cigs. Will lkly stay MVFR in downslope
flow at khie, and kleb may stay MVFR through most of the night
as well. Coastal terminals ans kaug will lifr into Tue morning.
Some improvement possible, to MVFR, away from the coast tue
afternoon, but conds should return to ifr again Tue night.
Long term... MainlyVFR to MVFR conditions across the interior on
Wednesday except scattered ifr in showers and thunderstorms
later in the afternoon and evening. On the coastal plain, ifr
conditions in low clouds and mist could hang on for much of the
day. Improvement toVFR is foreseen on Thursday, with the
potential for lower conditions returning on Friday.
Short term through Tuesday night ... Winds and seas likely to
remain below SCA levels tonight through Tue night.
Long term... The next chance of SCA conditions for gusty winds
and increasing seas may occur Friday into Saturday as a cold
front crosses the waters.
Tides coastal flooding
The astronomical high tide in portland is 11.1 feet mllw at
3:08 am Tuesday. Surge on the high tide that just occurred is
around 0.6 feet. This will keep us below flood levels and with
seas and winds lowering a bit tonight, will not be issuing any
statement at this time.
Gyx watches warnings advisories
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|
|WELM1 - 8419317 - Wells, ME||14 mi||50 min||NE 4.1 G 5.1||46°F||1021.3 hPa|
|WEXM1 - Wells Reserve, ME||14 mi||98 min||N 2.9||46°F||46°F|
|44030 - Buoy B0102 - Western Maine Shelf||25 mi||94 min||NNE 9.7 G 9.7||46°F||48°F||4 ft||1020.9 hPa|
|BGXN3 - Great Bay Reserve, NH||27 mi||113 min||NNE 1.9||47°F||1022 hPa||47°F|
|CASM1 - 8418150 - Portland, ME||32 mi||56 min||48°F||50°F||1021.2 hPa|
|44007 - PORTLAND 12 NM Southeast of Portland,ME||34 mi||48 min||NNE 5.8 G 7.8||46°F||47°F||4 ft||1021.2 hPa (+0.9)||45°F|
|IOSN3 - Isle of Shoals, NH||34 mi||38 min||NE 8.9 G 9.9||47°F||1020.6 hPa (+0.5)||46°F|
Wind History for Wells, ME(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Sanford, Sanford Regional Airport, ME||5 mi||42 min||ENE 3||2.50 mi||Fog/Mist||46°F||45°F||96%||1022.3 hPa|
|Rochester - Skyhaven Airport, NH||14 mi||47 min||ENE 3||1.00 mi||Fog/Mist||46°F||44°F||93%||1020.5 hPa|
|Pease Air Force Base / Portsmouth, NH||24 mi||1.7 hrs||NE 6||7.00 mi||Overcast||47°F||45°F||95%||1020.9 hPa|
Wind History from SFM (wind in knots)
|1 day ago||Calm||Calm||Calm||Calm||Calm||N||Calm||Calm||Calm||Calm||SE||E||E||E||E||Calm||Calm|
|2 days ago||W||W||W||NW||Calm||W||NW||N||N||NE||NE||NE|
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
Click for Map
Mon -- 02:12 AM EDT 11.09 feet High Tide
Mon -- 05:06 AM EDT Sunrise
Mon -- 08:35 AM EDT -1.60 feet Low Tide
Mon -- 09:12 AM EDT Moonrise
Mon -- 02:55 PM EDT 9.77 feet High Tide
Mon -- 08:13 PM EDT Sunset
Mon -- 08:51 PM EDT -0.19 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
Click for Map
Mon -- 03:55 AM EDT 8.89 feet High Tide
Mon -- 05:07 AM EDT Sunrise
Mon -- 09:14 AM EDT Moonrise
Mon -- 10:16 AM EDT -1.14 feet Low Tide
Mon -- 04:41 PM EDT 7.82 feet High Tide
Mon -- 08:14 PM EDT Sunset
Mon -- 10:32 PM EDT -0.02 feet Low Tide
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 (23,6,7,8)(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.