Friday, May26, 2017 L-36.com


Marine Weather and Tides
South Hooksett, NH

Version 3.4
What's New / NOTES
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 5:10AMSunset 8:15PM Friday May 26, 2017 1:36 AM EDT (05:36 UTC) Moonrise 6:13AMMoonset 9:12PM Illumination 0% Phase: New Moon; 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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ANZ230 Boston Harbor- 116 Am Edt Fri May 26 2017
Rest of tonight..NE winds 10 to 15 kt. Seas around 2 ft. Areas of fog. Widespread showers with isolated tstms. Some tstms may produce heavy rainfall. Vsby 1 nm or less.
Fri..N winds 5 to 10 kt...becoming nw 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas around 2 ft. Areas of fog. Numerous showers. Vsby 1 nm or less.
Fri night..NW winds 5 to 10 kt. Seas 2 to 3 ft.
Sat..N winds 5 to 10 kt...becoming E in the afternoon. Seas 1 foot or less.
Sat night..SE winds 5 to 10 kt...becoming S after midnight. Seas 1 foot or less.
Sun..S winds around 5 kt...becoming se in the afternoon. Seas 1 foot or less.
Sun night..SE winds 5 to 10 kt. Seas 1 foot or less. A chance of showers.
Mon..E winds around 5 kt. Seas 1 foot or less. Showers likely.
Mon night..SE winds around 5 kt. Seas 1 foot or less.
Tue..S winds around 5 kt. Seas 1 foot or less. A chance of showers.
Tue night..SW winds around 5 kt. Seas 1 foot or less. 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 116 Am Edt Fri May 26 2017
Synopsis for massachusetts and rhode island coastal waters.. A potent low pressure system will move over the area tonight and into tomorrow. Heavy rainfall will limit visibility at times. Anticipate quiet weather for the weekend with another frontal system moving through late Sunday into Monday. 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 260448 aaa
afdgyx
area forecast discussion... Updated
national weather service gray me
1248 am edt Fri may 26 2017

Synopsis
A broad area of low pressure from the ohio valley through the
mid atlantic coast will slowly lift northeast tonight... Reaching
cape cod by Friday morning. Low pressure will continue
northeast into the maritimes through Friday night. Weak high
pressure will build over the area on Saturday and will shift
offshore on Sunday. Weak low pressure over the eastern great
lakes will lift north into western quebec Sunday night and will
drive a cold front toward the region on Monday. The front will
slowly cross the area late Monday night and Tuesday.

Near term until 6 am this morning
Update... Have introduced thunder to the grids based on latest
trends and near term forecasts. Lightning detection is still
showing plenty of activity in the convection moving nwd... Less
than an hour from our SRN border now. SPC mesoanalysis shows
around 500 j kg MUCAPE lingering along the coast. This is
supported by forecast soundings showing a nice area of cape
available just above the llj. Heavy rain continues in the
forecast as well... With SRN new england ASOS awos reports
showing 0.50 to 0.75 inches in an hour.

I will also let the coastal flood headlines expire on time.

1045pm update...

initial batch of rain has developed and begun pushing onshore
over much of maine this evening, while another more substantial
area of rain is finally taking shape to the south of rhode
island. Hrrr model is handling both areas of rain quite well,
and based the forecast update largely on this. Precipitation
from the heavier band to the south should be arriving in
southern new hampshire around midnight. Thunderstorms are
currently noted with this activity as it is forming. As this
wraps around the low, expect the thunderstorm activity to
decrease a bit, but there could still be some rumbles of thunder
across the southern part of our area overnight as this low winds
up. Have increased precipitation amounts as well, as even this
earlier area of rain forming along the coast of maine has
produced some decent rainfall rates. Area moving in from the
south could produce rates up to about an inch per hour, though
the heaviest rain should only last an hour or two before
becoming light and drizzly.

945pm update...

getting a few reports of high, gusty winds. Have increased wind
forecast for the overnight hours, especially through 06z where
best wind fields will be in place from the northeast.

Otherwise, have updated the forecast based on current
conditions and latest set of mesoscale models. Rain continues to
spread north and east, however it remains fairly light and
fragmented in most areas. Heaviest precipitation remains over
upstate new york well to our west. However, satellite imagery
continues to show a large plume of moisture forming off the mid
atlantic coastline and moving quickly to the north. Mesoscale
models have this heavier precipitation arriving from south to
north within the 06z and 12z time frame.

Have made minor adjustments to pops and temperatures for the
next 6 hours. Areas of light rain will continue with downsloping
over the northern connecticut river valley.

Original discussion...

higher pressure and easterly winds have kept much rain from
intruding into northern new england by retarding the advancement
of precipitation into maine and northern and central nh until
the last couple of hours. The flow has intensified along the
coast as the pressure gradient increases low pressure nears.

Temperatures have been kept down in this marine airmass while
northern sections were able to break out into the 60s.

Cam models have been correct in showing a weakness this
afternoon in precipitation fields over nh and especially maine
as energy diverges both towards northern ny state as well as
offshore. We'll see a break in most shower activity more or
less this afternoon and evening... However there will be widely
scattered showers still around... Mainly over the mountains.

Around midnight a stronger short wave associated with this
system will pivot into the area and precipitation will increase
both in intensity and areal coverage. This is when we will see
the bulk of the 1-2 inches with this event. We'll see some heavy
downpours for the overnight period into Friday morning.

Winds are picking up as mixing deepens today and expect ese
winds to gust to 25 kt through the night. Continued with
drizzle tonight mainly in between the two systems as the onshore
flow intensifies. Lows will be in the upper 40s to around 50.

Short term 6 am this morning through 6 pm Saturday
After the heavier rain expected during the morning
hours... Precipitation tapers off to showers by Friday afternoon.

Again the heavier rain will be along the coast with some
enhancement over terrain. The long duration of this event should
preclude any flooding issues but poor drainage areas may see
some brief issues in heavier rainfall that occurs through
tomorrow. Expect temperatures to warm only about 5-10 degrees
from overnight lows tonight to highs Friday. Tomorrow night
clouds will begin to decrease across the region. The upper low
will be engulfed in another circulation south of greenland while
the surface cyclone fills. Overnight lows Friday night will
drop farther in a drier airmass with lows in the 40s most
locations and perhaps up to 50 degrees in warm spots.

Long term Saturday night through Thursday
Mean long wave trof position will remain over the great lakes, this
will mean a general cool wet pattern can be expect for the
outlook period with a few dry periods between systems.

Starting with Saturday, the system that exits into the maritimes
allows weak high pres over the area and a drier north to
northwest flow to develop for Saturday into Sunday with cool
temps. By late Sunday into Monday, the next short wave that
rotates around the base of the great lakes trof then moves
northeast bringing another period of wet weather with a
developing onshore flow that keeps temps cool. With the mean
upper trof remaining over the great lakes through mid week a
continue unstable southwest flow with embedded short waves with
keep unsettled conditions through Wednesday. It appears we may
finally get rid of the onshore flow by midweek so temps may
actually get back to near normal high temps reaching into the
70s.

Aviation 06z Friday through Tuesday
Short term... Ifr lifr ceilings developing today and persisting
through tomorrow. Ese winds will gust to 25 kts most terminals
through tomorrow. Early on llws will affect hie and leb tonight.

Drizzle and fog will affect most TAF sites outside of hie and
leb tonight before the moderate to heavy rain arrives.

Long term... Winds and seas generally light. No flags.

Marine
Short term... Continuing scas through Friday afternoon. At that
point we may need a SCA just for high seas for the outer waters.

Long term... Conditions becomeVFR Sat into Sun before returning to
MVFR conditions for Sun night and Monday and possibly through
midweek in scattered showers.

Tides coastal flooding
Highest astronomical tides of the year on tap for tonight and
Friday night. A coastal flood advisory remains in place the
midcoast region of maine.

The astronomical tide in portland is 11.8 feet near midnight
tonight. Expect around a foot of storm surge overnight. Flood
stage in portland is 12 feet and a storm tide will likely be
near 13. Areas of flooding are expected with pockets of
moderate flooding. Have therefore upgraded the coastal flood
advisories from portland south to warnings.

We may need a coastal flood statement for the tide tomorrow
night despite the absence of an onshore wind as astronomical
tides will be at the flood stage of 12.0 feet in portland.

Gyx watches warnings advisories
Me... Coastal flood advisory until 1 am edt early this morning for
mez025>028.

Coastal flood warning until 1 am edt early this morning for
mez023-024.

Nh... Coastal flood warning until 1 am edt early this morning for
nhz014.

Marine... Small craft advisory until 8 pm edt this evening for
anz150>154.

Near term... Legro


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
BGXN3 - Great Bay Reserve, NH 29 mi111 min NE 7 49°F 1006 hPa49°F
IOSN3 - Isle of Shoals, NH 40 mi36 min NE 25 G 28 48°F 1001.1 hPa (-4.6)48°F
WELM1 - 8419317 - Wells, ME 48 mi48 min NE 14 G 18 49°F 1004.3 hPa
BHBM3 - 8443970 - Boston, MA 49 mi48 min 51°F 54°F1000.7 hPa

Wind History for Wells, ME
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Manchester Airport, NH6 mi43 minNNE 11 G 186.00 miLight Rain Fog/Mist50°F46°F86%1003.1 hPa
Concord Municipal Airport, NH15 mi45 minNE 13 G 199.00 miOvercast50°F46°F89%1003.3 hPa
Nashua - Boire Field Airport, NH17 mi40 minN 54.00 miRain Fog/Mist49°F48°F97%1003.8 hPa
Lawrence, Lawrence Municipal Airport, MA24 mi42 minNE 16 G 244.00 miThunderstorm in Vicinity Fog/Mist51°F48°F89%1001.8 hPa

Wind History from MHT (wind in knots)
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Last 24hrCalmCalmCalmN4NE4E4E7E8E5E9E8E16E14
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1 day agoCalmCalmN4N3CalmN4N6N43SE5SE7SE6S7S8E7SE7SE3SE8SE7SE6SE5SE3CalmCalm
2 days agoCalmNW6NW3N3NW4N4NW43NW5NW8NW8NW8NW7NW4W4SW6SW5S5SE3S4S3CalmCalmCalm

Tide / Current Tables for Riverside, Merrimack River, Massachusetts
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Riverside
Click for Map
Fri -- 01:25 AM EDT     7.33 feet High Tide
Fri -- 05:12 AM EDT     Sunrise
Fri -- 06:13 AM EDT     Moonrise
Fri -- 09:24 AM EDT     -0.62 feet Low Tide
Fri -- 02:05 PM EDT     6.54 feet High Tide
Fri -- 08:11 PM EDT     Sunset
Fri -- 09:09 PM EDT     Moonset
Fri -- 09:37 PM EDT     -0.26 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.87.27.26.75.64.22.51.1-0-0.6-0.31.33.75.76.56.35.64.531.60.5-0.1-0.11.2

Tide / Current Tables for Merrimacport, Merrimack River, Massachusetts
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Merrimacport
Click for Map
Fri -- 12:55 AM EDT     8.98 feet High Tide
Fri -- 05:11 AM EDT     Sunrise
Fri -- 06:12 AM EDT     Moonrise
Fri -- 08:02 AM EDT     -0.88 feet Low Tide
Fri -- 01:35 PM EDT     8.02 feet High Tide
Fri -- 08:11 PM EDT     Sunset
Fri -- 08:15 PM EDT     -0.37 feet Low Tide
Fri -- 09:09 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.498.57.25.33.11-0.4-0.9-0.21.64.16.57.87.97.25.73.81.80.3-0.301.74.3

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 (1,6,7,8)
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Ground Weather Radar Station Boston, MA
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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.