Friday, August18, 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 5:52AMSunset 7:41PM Friday August 18, 2017 6:04 PM EDT (22:04 UTC) Moonrise 2:15AMMoonset 5:22PM Illumination 12% Phase: Waning Crescent; Moon at 26 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- 342 Pm Edt Fri Aug 18 2017
Tonight..S winds 15 to 20 kt. Seas 2 to 4 ft. Showers. Tstms likely this evening, then a slight chance of tstms after midnight. Patchy fog after midnight. Some tstms may produce heavy rainfall. Vsby 1 to 3 nm.
Sat..S winds 10 to 15 kt, becoming se 5 to 10 kt in the afternoon. Seas 2 to 3 ft. Patchy fog. Vsby 1 nm or less.
Sat night..SW winds 5 to 10 kt. Seas around 2 ft.
Sun..W winds 5 to 10 kt. Seas 1 foot or less.
Sun night..W winds around 5 kt. Seas 1 foot or less.
Mon..W winds around 5 kt, becoming sw in the afternoon. Seas 1 foot or less.
Mon night..SW winds 5 to 10 kt. Seas 1 foot or less.
Tue..SW winds 5 to 10 kt. Seas around 2 ft.
Tue night..SW winds 10 to 15 kt. Seas around 2 ft.
Wed..SW winds 10 to 15 kt. Seas around 2 ft. A chance of showers.
Wed night..W winds 5 to 10 kt. Seas around 2 ft. A chance of showers. Winds and seas higher in and near tstms. 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 342 Pm Edt Fri Aug 18 2017
Synopsis for massachusetts and rhode island coastal waters.. A cold front will approach the waters from the west tonight, prompting showers and scattered Thunderstorms with areas of fog. The front will push thru the waters Saturday, bringing mainly dry conditions for the day. High pressure will return with dry weather during Saturday night through Tuesday. A cold front will then approach the waters midweek. 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 182139
afdgyx
area forecast discussion
national weather service gray me
539 pm edt Fri aug 18 2017

Synopsis
A warm front will gradually push east of the region tonight. A
slow moving cold front will cross the region Saturday. High
pressure will build in from the west Sunday through Monday and
will slide offshore on Tuesday. A cold front will move in from
the west Tuesday night and will cross the region on Wednesday.

High pressure will build in behind the front Wednesday night
through Friday.

Near term until 6 am Saturday morning
Update...

have updated the grids based on current conditions and latest
set of mesoscale models. Bands of heavy rain moved through many
areas this afternoon. There has been a lull early this evening,
however another batch of locally heavy rainfall will continue to
spread eastward from southern new hampshire this evening.

Earlier, a report of an inch per hour occured with this
precipitation. Another inch of rain in a few communities will
bring storm totals locally into the 2 to 3 inch range. Highest
totals so far today have been in coastal york county. Radar
estimates are underdone for this area.

An areal flood advisory will remain in effect through 7 pm for
much of southern new hampshire and far southwest maine where the
heavier echoes continue. The greatest threat will be for urban
type flooding on roadways, culverts and low lying areas.

Much of the precipitation will begin to taper off late this
evening and become more scattered as best dynamics shift to the
east.

Made some minor modifications to the dew point, wind and sky
cover grids for this evening. The rest of the forecast will
remain relatively unchanged.

Prev disc...

warm front to the southwest continues to produce
rain and rain showers mainly across southern zones. Rain will be
occasionally heavy through the early evening hours as low level
jet combines with pwat's of 2 inches or better sweeping through
southern and coastal zones. Expect storm totals of 1 to 1.5
inches in southern new hampshire and coastal locations with
locally 2 inch amounts in midcoast maine. Rain will begin to
taper off in these areas by mid evening and should clear most of
the forecast area by midnight. Ocean stratus and areas of fog
will blanket the region during the overnight. Lows will range
from the mid 50s north to the mid 60s south.

Short term 6 am Saturday morning through Saturday night
Warm front will be quickly followed by a slow moving cold front
on Saturday. As boundary layer winds turn into the west ocean
stratus will gradually get shunted eastward during the morning
hours although mid coast maine may take much of the afternoon to
break out. Marginal instability associated with the front will
likely kick off afternoon showers and thunderstorms mainly
across new hampshire and western maine where heating will be
the greatest. Will be a fair amount of shear so some stronger
cells may produce some wind damage but capes may be a limiting
factor. Highs Saturday will range from the 70s in central maine
to the 80s in western maine and new hampshire.

High pressure will build in behind the front Saturday night
bringing clearing skies downwind of the mountains. In the north
upslope flow and lingering moisture will result in mostly cloudy
skies and possibly a stray shower. Lows will range from the
upper 50s north to the mid 60s south.

Long term Sunday through Friday
Skies will become partly cloudy during the day Sunday as drier
air moves into the region behind the front. There could be a
lingering shower in the mountains early... Otherwise, temps will
warm to the mid 70s north to the mid 80s south as a ridge of high
pressure builds into the area.

The ridge will move offshore Monday and Tuesday as a cold front
slowly approaches from the west. This will lead to increasing
temperatures and humidity for Monday and Tuesday. High temps
Tuesday will mainly range from near 80 in the mountains to near
90 in southeastern new hampshire and extreme southwestern
maine. Along with the warmer temps and higher humidity, the
threat of showers and possible thunderstorms will be on the
increase Tuesday afternoon through Wednesday as a cold front
approaches and crosses the region. Showers could linger
Wednesday night.

Cooler and drier air following the front for Thursday and
Friday as surface high pressure builds into the region. With the
colder air moving in aloft and an upper level trough developing
over the area Thursday and Friday, an afternoon shower can't be
ruled out, especially in mountain areas, but most areas should
be dry.

Aviation 22z Friday through Wednesday
Short term... Ifr lifr ceilings and vsby overnight. Gradually
improving toVFR Saturday.VFR Saturday night with areas of
ifr lifr in valley fog.

Long term... MainlyVFR conditions for Sunday into Tuesday with
ifr conditions possible in valley fog early in the mornings.

MVFR to ifr conditions likely Tuesday night and Wednesday in
showers and possible thunderstorms.

Marine
Short term... Continuing sca's for tonight through Saturday.

Long term... Winds should be diminishing and seas subsiding
Sunday and Monday and will be below SCA criteria through
Tuesday. Winds and seas will be increasing late Tuesday with
sca conditions possible Tuesday night and Wednesday.

Gyx watches warnings advisories
Me... None.

Nh... None.

Marine... Small craft advisory until 8 pm edt Saturday for anz150-152-
154.

Near short term... Cannon


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
IOSN3 - Isle of Shoals, NH 9 mi64 min SSE 21 G 23 68°F 1009.6 hPa (-1.6)67°F
BGXN3 - Great Bay Reserve, NH 20 mi139 min E 1.9 70°F 1011 hPa70°F
44029 - Buoy A0102 - Mass. Bay/Stellwagen 21 mi120 min SSE 12 G 14 70°F 66°F3 ft1010.2 hPa
44098 - Jeffrey's Ledge, NH (160) 24 mi28 min 64°F4 ft
44030 - Buoy B0102 - Western Maine Shelf 26 mi120 min SSE 14 G 18 65°F 62°F3 ft1011.1 hPa
WELM1 - 8419317 - Wells, ME 34 mi46 min Calm G 1 65°F 60°F1010.7 hPa
44013 - BOSTON 16 NM East of Boston, MA 34 mi74 min SSE 12 G 14 69°F 68°F2 ft1010.3 hPa (-1.3)
WEXM1 - Wells Reserve, ME 35 mi124 min ESE 2.9 66°F 66°F
BHBM3 - 8443970 - Boston, MA 40 mi46 min 76°F 1008.9 hPa

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Pease Air Force Base / Portsmouth, NH21 mi66 minESE 41.50 miLight Rain Fog/Mist70°F68°F97%1009.6 hPa
Beverly, Beverly Municipal Airport, MA24 mi71 minSSE 710.00 miOvercast76°F72°F88%1009.2 hPa

Wind History from PSM (wind in knots)
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Last 24hrW6W3CalmCalmSW2CalmCalmN2CalmN3NE4NE4S4NE5CalmSE5SE6E7E7SE8SE7SE4E4E4
1 day agoNW13NW8NW5NW6NW7W4W6W3W3W5W3CalmW4W6W3SW4W6W7NW11W9
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Tide / Current Tables for Gosport Harbor, Isles of Shoals, New Hampshire
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Gosport Harbor
Click for Map
Fri -- 02:13 AM EDT     -0.23 feet Low Tide
Fri -- 02:15 AM EDT     Moonrise
Fri -- 05:51 AM EDT     Sunrise
Fri -- 08:31 AM EDT     8.50 feet High Tide
Fri -- 02:26 PM EDT     0.25 feet Low Tide
Fri -- 05:21 PM EDT     Moonset
Fri -- 07:39 PM EDT     Sunset
Fri -- 08:51 PM EDT     9.92 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.40.6-0.20.11.43.45.67.48.48.47.45.63.31.40.40.41.53.568.29.59.99.27.4

Tide / Current Tables for Newburyport (Merrimack River), Massachusetts Current
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Newburyport (Merrimack River)
Click for Map
Fri -- 02:17 AM EDT     Moonrise
Fri -- 03:25 AM EDT     0.00 knots Slack
Fri -- 05:53 AM EDT     Sunrise
Fri -- 07:15 AM EDT     1.58 knots Max Flood
Fri -- 09:29 AM EDT     -0.00 knots Slack
Fri -- 11:55 AM EDT     -1.26 knots Max Ebb
Fri -- 03:44 PM EDT     0.00 knots Slack
Fri -- 05:22 PM EDT     Moonset
Fri -- 07:39 PM EDT     1.63 knots Max Flood
Fri -- 07:40 PM EDT     Sunset
Fri -- 09:51 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-1.4-1.1-0.9-0.40.51.11.31.61.40.5-0.5-1.1-1.3-1.1-0.9-0.60.211.31.51.60.9-0.1-1

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 (18,4,5,8)
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Ground Weather Radar Station Portland, ME
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weather_mapweather_map weather_map

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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.