Marine Weather and Tides
5/20/2018 -- NOAA is having problems with the data feed that I use to draw the graphs. They are aware of the issue and working to resolve it. Sometimes changing the location by about a mile will give a correct graph. 3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
|Sunrise 5:11AM||Sunset 8:07PM||Monday May 21, 2018 11:05 AM EDT (15:05 UTC)||Moonrise 11:36AM||Moonset 1:12AM||Illumination 42%|
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|ANZ154 Coastal Waters From Cape Elizabeth, Me To Merrimack River, Ma Out 25 Nm- 902 Am Edt Mon May 21 2018 |
Rest of today..W winds 5 to 10 kt, becoming sw 10 to 15 kt with gusts up to 20 kt this afternoon. Seas 2 to 3 ft.
Tonight..SW winds 5 to 15 kt. Gusts up to 20 kt in the evening. Seas 2 to 3 ft.
Tue..S winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Gusts up to 25 kt. Seas around 2 ft.
Tue night..S winds 10 to 15 kt, becoming sw 5 to 15 kt after midnight. Gusts up to 25 kt. Seas 2 to 3 ft. A chance of showers.
Wed..SW winds 5 to 10 kt. Seas around 2 ft.
Wed night..NW winds 5 to 10 kt, becoming N after midnight. Seas around 2 ft.
Thu..E winds 5 to 10 kt. Seas 2 to 3 ft.
Thu night..SW winds 10 to 15 kt with gusts up to 30 kt. Seas 2 to 4 ft.
Fri..W winds 10 to 15 kt with gusts up to 30 kt. Seas 2 to 4 ft.
Fri night..SW winds 5 to 10 kt with gusts up to 20 kt. Seas 2 to 3 ft.
|ANZ100 902 Am Edt Mon May 21 2018 |
Synopsis for stonington me to merrimack river ma out to 25 nm.. High pressure builds south of the gulf of maine through tonight. A weak cold front will drop south across the area late today before returning north as a warm front Tuesday. A weak low passes north of the waters Tuesday and Tuesday night, dragging a cold front across the waters Wednesday. Another chance of precipitation will move through later in the weekend.
7 Day Forecast for Marine Location Near Cape Neddick, MEHourly EDIT Help
Area Discussion for - Gray/Portland, ME  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus61 kgyx 211305|
area forecast discussion
national weather service gray me
905 am edt Mon may 21 2018
High pressure will slide offshore to the south of new england
late today. A moisture starved cold front will drop south from
quebec later today. The front will return north as a warm front
on Tuesday, spreading showers into the area. Another cold front
drops south through the region Wednesday. Weak low pressure
tracks along the international border late Thursday into Friday.
A frontal system tracks into the area for the holiday weekend
bringing widespread showers.
Near term until 8 pm this evening
905 am... At 12z a 1026 millibar high was draped across the
lower great lakes. A weak cold front extended from the gaspe
peninsula through the saint lawrence valley. GOES visible
imagery showed clear skies across the forecast area with
lingering stratus and fog along the connecticut valley quickly
burning off in the strong late may sunshine. For
today... Westerly flow will back to the southwest and strengthen
a bit in advance of the weak frontal boundary. Winds along the
coastal waters vicinity of penobscot bay may briefly approach
small craft in gusts this afternoon ahead of this boundary.
Otherwise... A quiet day with remaining issue being dry westerly
flow and warm temperatures producing an elevated fire danger. I
raised high temperatures a few degrees... Mainly along the coast
as the strengthening pre- frontal westerly flow keeps the
seabreeze at bay.
640 am update...
minor changes to the going forecast for observational
temperatures and dew points overnight. Have interpolated this to
the recent updates to the near term forecast.
warming and drying downsloping winds are expected to develop
today behind a departing cold front with high pressure building
in from the west. Today will be sunny with high temperatures in
the 70s most locations, with mid to upper 70s likely for
interior spots. It will be warmest over southern nh where
manchester and nashua will approach 80 degrees.
Winds will be wnw and around 10 mph with higher gusts,
especially over the mountains. Rh values drop into the 20-30%
range, with higher rh values across the north. This is due to
fast moving flow aloft, which will keep moisture along the
canadian border from around 850-700mb in particular. Thus, the
lower rh values and borderline higher wind gusts are not
juxtaposed, so a red flag warning can be avoided at this time.
Will be issuing a statement to impress the still dangerous fire
Short term 8 pm this evening through 6 pm Tuesday
Tonight expect weak SW flow along with increasing cloud cover
from the SW as the next system approaches. This will yield
temperatures in the 40s north with lower 50s along the coast and
over southern nh. On Tuesday temperatures will warm into the
upper 60s and lower 70s, with readings capped there by clouds
and rainfall. In particular a warm front will spread showers
across northern new england mainly in the afternoon and evening.
Higher QPF will be wrung out along the whites and the western
maine mountains, but expect less than a quarter inch there with|
basin average less than a tenth in many places. Farther east and
south will see less rain through Tuesday evening.
Long term Tuesday night through Sunday
As we continue into the middle of the week split flow continues over
the western CONUS with an upper level trough centered over quebec.
That split flow will begin to break down towards the end of the week
with the cut off low reforming eastwards allowing for a tropical
moisture source into the eastern CONUS by the end of the weekend.
For Wednesday we'll see showers across the area as a short wave
dives through the low over quebec. A rumble of thunder is possible
in the afternoon as k index climbs to near 30 as the upper level
vort MAX moves through.
Thursday and Friday will see high pressure over the region as the
upper levels ridge begins to progress eastwards. A
sea breeze will impact the coast throughout the end of the week
keeping high temperatures lower along the water. Inland temperatures
will climb into the upper 70s on Thursday and into the 80s on Friday
under mostly sunny skies.
Saturday starts a pattern shift as a cut off low begins to form over
the southeast us. This will allow for a flow of tropical moisture
northwards bringing rain for the end of the weekend. The
formation of the cut off low will be key in the timing and
strength of the precipitation and that will be the feature to
watch through this week as we look ahead to the holiday weekend.
Aviation 13z Monday through Friday
Short term... MainlyVFR through tonight. Valley fog continues
this morning at kleb khie with lifr conditions. This should
improve by 11z or so. Gusty westerly winds expected this
afternoon before diminishing this evening.
Long term... Generally prevailingVFR through the weekend. A
few showers on Wednesday may briefly drop conditions to MVFR
through the mountains. High pressure builds in for the end of
the week and holds through the weekend. Widespread rain will
develop Saturday night into Sunday with ifr possible.
Sunny skies are expected today with temperatures warming into the
70s along the coast. At the same time, water temperatures
remain only in the lower 50s. The combination of pleasant
weather conditions for paddlecraft and very cold atlantic waters
will combine for an increased risk of hypothermia and death for
anyone who accidentally falls into the water. A beach hazards
statement has been issued through this evening for the seacoast
of nh and the western maine coast. Westerly flow will strengthen
today ahead of a weak cold front with a few gusts approaching
small craft possible across the waters vicinity of penobscot
Minimum rh values will fall to between 20 and 30 percent this
afternoon, and westerly winds will be around 10 mph gusting to
near 20 mph at times. However, these two conditions do not occur
in the same place, and red flag criteria is not expected to be
met. Still, a statement will be issued addressing the potential
for hazardous fire weather conditions.
Gyx watches warnings advisories
Me... Beach hazards statement until 8 pm edt this evening for
Nh... Beach hazards statement until 8 pm edt this evening for nhz014.
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|
|44030 - Buoy B0102 - Western Maine Shelf||9 mi||122 min||W 1.9 G 3.9||56°F||54°F||2 ft||1019.5 hPa|
|WELM1 - 8419317 - Wells, ME||11 mi||48 min||SSE 6 G 8|
|WEXM1 - Wells Reserve, ME||12 mi||66 min||SSE 2.9||70°F||47°F|
|IOSN3 - Isle of Shoals, NH||13 mi||66 min||W 4.1 G 4.1||60°F||1020.7 hPa (+1.0)||44°F|
|BGXN3 - Great Bay Reserve, NH||15 mi||81 min||WSW 2.9||65°F||48°F|
|44098 - Jeffrey's Ledge, NH (160)||34 mi||60 min||53°F||3 ft|
|44007 - PORTLAND 12 NM Southeast of Portland,ME||35 mi||76 min||SW 7.8 G 7.8||56°F||51°F||2 ft||1020.2 hPa (+0.8)||48°F|
|CASM1 - 8418150 - Portland, ME||39 mi||54 min||69°F||51°F||1020.1 hPa|
|44029 - Buoy A0102 - Mass. Bay/Stellwagen||44 mi||122 min||56°F||53°F||2 ft||1019.7 hPa|
Wind History for Wells, ME(wind in knots) EDIT (on/off)  Help
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Pease Air Force Base / Portsmouth, NH||13 mi||70 min||S 5||10.00 mi||Fair||66°F||44°F||45%||1020.8 hPa|
|Sanford, Sanford Regional Airport, ME||18 mi||10 min||Var 5||10.00 mi||Fair||70°F||32°F||25%||1020.6 hPa|
|Rochester - Skyhaven Airport, NH||19 mi||15 min||NNW 6||10.00 mi||Fair||71°F||41°F||34%||1020 hPa|
Wind History from PSM (wind in knots)
|1 day ago||E||SE||SE||E||E||E||E||E||E||Calm||Calm||Calm||Calm||Calm||SW||S||S||S||S||Calm||Calm||SW||SW||SW|
|2 days ago||E||E||E||SE||SE||E||E||S||S||SE||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||Calm||NE||E||E||E |
EDIT RT Ports Option Weekend mode (on/off) (on/off)  Help One Week of Data
|Cape Neddick |
Click for Map
Mon -- 01:11 AM EDT Moonset
Mon -- 04:21 AM EDT 9.97 feet High Tide
Mon -- 05:12 AM EDT Sunrise
Mon -- 10:55 AM EDT -0.56 feet Low Tide
Mon -- 11:35 AM EDT Moonrise
Mon -- 05:12 PM EDT 9.05 feet High Tide
Mon -- 08:05 PM EDT Sunset
Mon -- 11:17 PM EDT 0.69 feet Low Tide
Mon -- 11:50 PM EDT First Quarter
Tide / Current data from XTide NOT FOR NAVIGATION
EDIT (on/off)  Help One Week of Data
|Portsmouth Harbor Entrance |
Click for Map
Mon -- 12:18 AM EDT 0.00 knots Slack
Mon -- 01:12 AM EDT Moonset
Mon -- 02:24 AM EDT 1.43 knots Max Flood
Mon -- 05:13 AM EDT Sunrise
Mon -- 06:01 AM EDT -0.00 knots Slack
Mon -- 09:01 AM EDT -2.20 knots Max Ebb
Mon -- 11:36 AM EDT Moonrise
Mon -- 01:00 PM EDT 0.00 knots Slack
Mon -- 03:01 PM EDT 1.34 knots Max Flood
Mon -- 06:54 PM EDT -0.00 knots Slack
Mon -- 08:05 PM EDT Sunset
Mon -- 09:32 PM EDT -1.81 knots Max Ebb
Mon -- 11:50 PM EDT First Quarter
Tide / Current data from XTide NOT FOR NAVIGATION
Weather Map and Satellite Images(on/off)  HelpWeather Map
GOES Local Image of Northeast EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
target = "new">Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Gray/Portland, ME (11,2,3,4)(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.