Monday, November20, 2017 L-36.com


Marine Weather and Tides
Seabrook Beach, NH

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 6:41AMSunset 4:17PM Monday November 20, 2017 12:54 AM EST (05:54 UTC) Moonrise 9:21AMMoonset 7:08PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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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ANZ251 Massachusetts Bay And Ipswich Bay- 1039 Pm Est Sun Nov 19 2017
.gale warning in effect through Monday afternoon...
Overnight..W winds 15 to 20 kt with gusts up to 35 kt. Seas 3 to 4 ft. A slight chance of.
Mon..W winds 20 to 25 kt with gusts up to 40 kt. Seas 3 to 5 ft.
Mon night..W winds 15 to 20 kt, becoming sw 10 to 15 kt after midnight. Gusts up to 30 kt. Seas 2 to 3 ft.
Tue..SW winds 10 to 15 kt with gusts up to 30 kt. Seas 2 to 3 ft.
Tue night..S winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. A chance of showers.
Wed..SW winds 10 to 15 kt, becoming nw 15 to 20 kt with gusts up to 25 kt in the afternoon. Seas 2 to 4 ft. Showers likely.
Wed night..NW winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft.
Thu..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft.
Thu night..W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft.
Fri..W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft.
Fri night..W winds 5 to 10 kt. Seas 2 to 3 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height.
ANZ200 1039 Pm Est Sun Nov 19 2017
Synopsis for massachusetts and rhode island coastal waters.. Strong 979 mb low pres over the maritimes this evening will continue to provide near wnw gales through Monday. High pres then builds across the waters Tue followed by another cold front moving across new england Wed. High pressure then builds over the waters Thu. For information on possible hazardous weather beyond the 24-36 hour forecast period, please visit www.weather.gov/boston and follow the current hazards link above the map on the left.

7 Day Forecast for Marine Location Near Seabrook Beach, NH
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location: 42.83, -70.61     debug


Area Discussion for - Gray/Portland, ME
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Fxus61 kgyx 200358
afdgyx
area forecast discussion
national weather service gray me
1058 pm est Sun nov 19 2017

Synopsis
A strong cold front has moved through new hampshire and western
maine with a cold west wind behind it. Expect the temperature to
fall into the 20s tonight and not get out of the 30s on Monday
as the cold air mass will still be overhead. Expect a brief warm
up on Tuesday before another cold front moves through the area
on Wednesday bringing a return to colder conditions which should
last into the weekend.

Near term until 6 am Monday morning
Update...

winds will continue to slowly diminish this evening. Have
lowered the wind advisories as of late this evening. Most
locations have decoupled. Very strong winds continue over the
higher mountainous terrain and is reflected in the recreational
forecast. Occasionally, some communities have reported light
winds only to report 30+ mph at times.

Clouds and a few snow showers continue over the northwestern
third of our forecast area. Have upped pops for this region as
well as the foothills with some light accumulating snows
possible.

Minor adjustments made to cloud and temperature forecast.

Otherwise very little change to the new forecast package.

Prev disc...

cold front has made its way through the entire forecast area
with winds making an abrupt shift to the west and temperatures
dropping. It's rather rare to see such a sharp cold front in new
england where interactions with terrain and complex multi-
frontal systems usually mean fronts go through in stages. But
this one has been easy to follow in surface observations which
have shown temperatures falling rapidly behind the front even
during the middle of the day. The strong westerly winds continue
into the evening and overnight hours as cold advection
continues. Any lingering showers will be tied to the terrain and
be falling in the form of snow. Low temperatures tonight will
generally be in the 20s as the strong push of cold air will keep
the low levels well mixed.

Short term 6 am Monday morning through Monday night
It will be windy again tomorrow, but not as windy as today.

Temperatures will not get out of the 30s and may stay in the 20s
to the north of the mountains where the core of the cold air is
banked up against the terrain. Ridge of high pressure noses into
the area overnight Monday night, allowing winds to finally die
off. This could lead to some good radiational cooling and cold
temperatures in spots that are able to go completely calm,
mainly in the east and north.

Long term Tuesday through Sunday
Strong SW flow develops Tuesday with a significant shortwave moving
through on Wednesday. Moisture returns ahead of the system on
Tuesday as a warm front lifts ne. An associated cold front will
shift offshore Tuesday night Wednesday morning. Temperatures ahead
of the front Tuesday will be similar in pattern to today, with 50s
south and 40s north. Temperatures will continue to tumble the next
few days thereafter as drier and cooler air funnels in from the
north.

Large scale troughing will remain across southeastern canada and the
northeastern states through the end of the week. At the surface
sprawling high pressure will build across the southern states and ne
into the midwest and new england.

Aviation 04z Monday through Friday
Short term... Gusty west winds will diminish a bit overnight,
but not completely. Will see an increase in gusts again on
Monday before the winds finally die off Monday night.VFR
conditions are expected except for MVFR ceilings north of the
white mountains.

Long term...VFR Tuesday. Cold front arrives on Wednesday and
could see MVFR or ifr conditions in light rain ahead of the
front. Expect improvement behind the front for Thursday and
Friday.

Marine
Short term... Cold west winds will gust up to 45 kt through this
evening along the outer waters. Have extended the gales until 5
am over the outer waters, with scas now on the bays.

Long term... Southwesterly flow expected on Tuesday before a cold
front moves across the waters on Wednesday. Northerly winds
behind this cold front could briefly reach advisory levels
Wednesday night.

Gyx watches warnings advisories
Me... None.

Nh... None.

Marine... Small craft advisory until 5 am est Monday for anz151-153.

Gale warning until 5 am est Monday for anz150-152-154.

Jc


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
IOSN3 - Isle of Shoals, NH 9 mi55 min W 22 G 24 37°F 1002.1 hPa (+1.9)22°F
BGXN3 - Great Bay Reserve, NH 20 mi70 min W 9.9 36°F 1003 hPa24°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 21 mi111 min WNW 19 G 25 41°F 49°F3 ft1001.7 hPa
44098 - Jeffrey's Ledge, NH (160) 24 mi49 min 52°F7 ft
44030 - Buoy B0102 - Western Maine Shelf 26 mi111 min W 25 G 33 39°F 49°F4 ft1001.3 hPa
WELM1 - 8419317 - Wells, ME 34 mi55 min WNW 9.9 G 15 36°F 49°F1001.6 hPa (+1.0)
44013 - BOSTON 16 NM East of Boston, MA 34 mi65 min W 23 G 29 41°F 50°F3 ft1001.7 hPa (+1.6)
WEXM1 - Wells Reserve, ME 35 mi55 min W 4.1 36°F 22°F
BHBM3 - 8443970 - Boston, MA 40 mi55 min 39°F 1003 hPa (+1.9)

Wind History for Wells, ME
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pease Air Force Base / Portsmouth, NH21 mi59 minW 710.00 miA Few Clouds35°F19°F53%1002.3 hPa
Beverly, Beverly Municipal Airport, MA24 mi62 minW 710.00 miFair35°F23°F61%1002.7 hPa

Wind History from PSM (wind in knots)
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Last 24hrSE6SE5SE8SE9SE8SE6S8S9S10S10S10
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1 day agoW7W4CalmSW4W5W7SW5SW5W3CalmS3S4SE7S4SE4CalmCalmCalmE3E4NW3S5SE5S3
2 days agoW9W12W13W14
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Tide / Current Tables for Gosport Harbor, Isles of Shoals, New Hampshire
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Gosport Harbor
Click for Map
Mon -- 05:46 AM EST     0.83 feet Low Tide
Mon -- 06:41 AM EST     Sunrise
Mon -- 08:21 AM EST     Moonrise
Mon -- 11:59 AM EST     9.16 feet High Tide
Mon -- 04:14 PM EST     Sunset
Mon -- 06:07 PM EST     Moonset
Mon -- 06:18 PM EST     0.02 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.47.96.44.32.41.10.91.63.25.37.38.79.28.67.252.70.90.10.31.43.35.47.1

Tide / Current Tables for Newburyport (Merrimack River), Massachusetts Current
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Newburyport (Merrimack River)
Click for Map
Mon -- 12:56 AM EST     -0.00 knots Slack
Mon -- 03:24 AM EST     -1.11 knots Max Ebb
Mon -- 06:41 AM EST     Sunrise
Mon -- 07:07 AM EST     0.00 knots Slack
Mon -- 08:21 AM EST     Moonrise
Mon -- 10:55 AM EST     1.63 knots Max Flood
Mon -- 01:10 PM EST     -0.00 knots Slack
Mon -- 03:44 PM EST     -1.28 knots Max Ebb
Mon -- 04:16 PM EST     Sunset
Mon -- 06:09 PM EST     Moonset
Mon -- 07:38 PM EST     0.00 knots Slack
Mon -- 11:22 PM EST     1.56 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.9-0-0.7-1.1-1.1-1-0.8-0.10.71.11.41.61.20.2-0.7-1.2-1.3-1.2-1.1-0.60.30.91.21.5

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 (0,6,7,8)
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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.