Thursday, August17, 2017 L-36.com


Marine Weather and Tides
South Hooksett, 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 5:53AMSunset 7:45PM Thursday August 17, 2017 11:30 AM EDT (15:30 UTC) Moonrise 1:22AMMoonset 4:26PM Illumination 22% Phase: Waning Crescent; Moon at 25 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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ANZ230 Boston Harbor- 1025 Am Edt Thu Aug 17 2017
This afternoon..W winds 5 to 10 kt, becoming s. Waves around 2 ft.
Tonight..SW winds 5 to 10 kt. Waves around 2 ft.
Fri..S winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Waves around 2 ft. A chance of showers.
Fri night..S winds 5 to 10 kt with gusts up to 20 kt. Waves around 2 ft. Patchy fog. Showers and tstms likely. Some tstms may produce heavy rainfall. Vsby 1 nm or less.
Sat..S winds 5 to 10 kt. Waves around 2 ft. Patchy fog. A chance of showers and tstms. Some tstms may produce heavy rainfall. Vsby 1 nm or less.
Sat night..SW winds around 5 kt. Waves 1 foot or less. A chance of showers.
Sun..W winds around 5 kt. Waves 1 foot or less.
Sun night..NW winds around 5 kt. Waves 1 foot or less.
Mon..W winds around 5 kt. Waves 1 foot or less.
Mon night..SW winds around 5 kt. Waves 1 foot or less. Winds and waves 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 1025 Am Edt Thu Aug 17 2017
Synopsis for massachusetts and rhode island coastal waters.. Weak high pressure will remain over the waters this afternoon into tonight. A warm front will bring a chance of rain for Fri with a cold front passing over the waters on Sat. High pressure will return on Sunday lingering into Tue. 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 South Hooksett, NH
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location: 43.01, -71.38     debug


Area Discussion for - Gray/Portland, ME
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Fxus61 kgyx 171516
afdgyx
area forecast discussion
national weather service gray me
1116 am edt Thu aug 17 2017

Synopsis
High pressure settles into new england today with dry
weather and seasonable temperatures. On Friday night... A warm
front associated with low pressure over the great lakes will
bring an area of rainfall to the northeast. The best chances for
a significant rainfall look to be farther south. Saturday should
bring a break in precipitation until the cold front swings
through the region. High pressure will build back into the
region Sunday into early next week with warming temperatures.

Near term until 6 pm this evening
1100 am update...

quick update to adjust temp TD sky grids. Mainly scattered to
broken high clouds across the area late this morning along with
a fair amount of smoke from forest fires in canada. Looking for
mostly sunny skies this afternoon with increasing high clouds in
the west late today. No major changes to current forecast
planned attm.

Prev disc...

high pressure will move over the region today. Northwesterly
flow will continue this morning as the strong upper low to our
northeast provides a pressure gradient through the region. This
will prevent any seabreeze from forming along the coast.

Additionally a few gusts to 20mph are again possible.

Temperatures will remain seasonable with highs near 80 south.

Short term 6 pm this evening through 6 pm Friday
Tonight look for the high pressure to begin to shift eastwards
as the next system moves out of the great lakes. Skies should
remain mostly clear overnight through the eastern portion of the
area with clouds approaching in the west. Increasing humidity
as a warm front lifts north will keep low temperatures milder.

Friday morning rain will move in as low pressure pushes
eastward. This rain will spread from west to east across the
area during the day on Friday. With southerly flow coming up out
of the tropics and high precipitable water values, heavy rain is
possible within the convective showers

Long term Friday night through Wednesday
Low pressure lifting into canada will continue to push a warm
front towards NRN new england Fri night. Model guidance suggests
this front will have trouble lifting thru the forecast area... So
will tend towards more of an occlusion with time. The best llj
forcing and rainfall potential looks to be Fri night... Where srn
zones near the warm front could see a welcomed precip event. The
nam forcing is a little more intense and sharper... Leading to a
shorter duration rainfall. The GFS forecast soundings are longer
duration 25 kt ssw LLJ that bring over a half inch to coastal
zones. The GFS forecast resembles the latest ECMWF as well... So
i will continue the heaviest precip near the coast overnight.

After the occlusion it will be warmer Sat as the low level
stable air is cleaned out. The initially clear dry slot will
give way to afternoon clouds and scattered showers or storms
ahead of the S WV trof axis. The timing of the trof appears to
be favoring Sat night... So not all that favorable for a focused
line of convection. So for now I will keep chance to slight
chance pop in the forecast for sat. I cannot rule out rain... But
it also does not look like a widespread rain.

After the trof passage a flat ridge looks to build into the
area... Though deep SW flow will be feeding into it. This should
allow some warmer temps to work back into the region with time
heading into midweek. The next trof will cross the area around
the Wed time frame.

Aviation 15z Thursday through Monday
Short term...VFR will continue across the area through late
tonight with just a chance for morning valley fog in the
connecticut river valley. Increasing clouds ahead of the
approaching system will eventually result in ceilings decreasing
and MVFR conditions moving in from west to east during Friday
afternoon. Friday night ifr in rain and fog is possible.

Long term... Areas of ifr conditions possible Fri night into sat
as warm front occlusion lifts into the forecast area. Into sat
morning LLJ forcing will bring a round of steadier precip to
coastal zones... And this is probably the best window for ifr or
lower conditions. Until the cold front sweeps thru the region
late sat... Shra and or an isolated tsra are possible though
generallyVFR conditions will prevail.VFR conditions continue
into mon.

Marine
Short term... Long period swell from hurricane gert is starting
to arrive in midcoast maine. Swell of 7-8ft with period around
12-14 seconds will provide a powerful pull and may result in
increased rip current risk. A high surf advisory remains in
effect through tonight for the midcoast and a small craft for
hazardous seas for the adjacent ocean waters. In the bays
sheltering will prevent any large swell while the southern maine
and new hampshire coast are too east facing to be affected by
the more southerly swell. After the swell decreases tonight
expect a period of calm conditions on the waters before seas and
winds begin to build as the next low moves through Friday night.

Long term... Winds and seas build in response to a LLJ lifting
across the waters with the warm front. Given the WAA over the
relatively cooler water... Wind gusts look to be marginally
close to SCA thresholds. More likely seas build to 5 ft on the
outer waters for a time sat. The next chance for SCA conditions
will be closer to midweek... Ahead of the next cold front.

Gyx watches warnings advisories
Me... High surf advisory until 8 pm edt this evening for mez025>027.

Nh... None.

Marine... Small craft advisory for hazardous seas until 8 pm edt this
evening for anz150-152.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BGXN3 - Great Bay Reserve, NH 29 mi106 min W 4.1 69°F 1018 hPa55°F
IOSN3 - Isle of Shoals, NH 40 mi31 min WSW 8.9 G 9.9 64°F 1016.7 hPa (-0.7)56°F
WELM1 - 8419317 - Wells, ME 48 mi43 min WNW 8 G 14 73°F 56°F1016.6 hPa
BHBM3 - 8443970 - Boston, MA 49 mi43 min 73°F 1016.9 hPa

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Manchester Airport, NH6 mi38 minVar 310.00 miMostly Cloudy74°F50°F43%1018.2 hPa
Concord Municipal Airport, NH15 mi40 minNW 610.00 miFair75°F51°F43%1017.4 hPa
Nashua - Boire Field Airport, NH17 mi35 minVar 310.00 miFair73°F52°F48%1018.8 hPa
Lawrence Municipal Airport, MA24 mi37 minNW 410.00 miFair74°F51°F45%1018.2 hPa

Wind History from MHT (wind in knots)
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Last 24hrNW12
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N7NW5NW6N6CalmNW6SW3N3CalmCalmS3CalmS333
1 day agoS5S7SW6SW6S7S7S7S6S6S7S6S5S3CalmSW4CalmCalmCalmCalmNW4NW7NW7NW11
G16
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2 days ago65SW7SW7SW5S7SW6SW3SW3SE6SE4CalmSE3S3CalmCalmCalmCalmS4SW4CalmS3S5S6

Tide / Current Tables for Riverside, Merrimack River, Massachusetts
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Riverside
Click for Map
Thu -- 01:21 AM EDT     Moonrise
Thu -- 04:39 AM EDT     -0.00 feet Low Tide
Thu -- 05:53 AM EDT     Sunrise
Thu -- 09:18 AM EDT     5.58 feet High Tide
Thu -- 04:23 PM EDT     Moonset
Thu -- 04:54 PM EDT     0.14 feet Low Tide
Thu -- 07:42 PM EDT     Sunset
Thu -- 09:41 PM EDT     6.46 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
4.12.81.60.60.10.11.12.94.65.55.554.23.1210.30.10.92.74.76.26.46.1

Tide / Current Tables for Merrimacport, Merrimack River, Massachusetts
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Merrimacport
Click for Map
Thu -- 01:21 AM EDT     Moonrise
Thu -- 03:17 AM EDT     -0.00 feet Low Tide
Thu -- 05:52 AM EDT     Sunrise
Thu -- 08:48 AM EDT     6.84 feet High Tide
Thu -- 03:32 PM EDT     0.21 feet Low Tide
Thu -- 04:23 PM EDT     Moonset
Thu -- 07:42 PM EDT     Sunset
Thu -- 09:11 PM EDT     7.91 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.51.80.600.31.53.45.36.56.86.45.442.410.30.31.43.25.47.27.97.76.8

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 (11,2,3,4)
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Ground Weather Radar Station Boston, MA
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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.