Tuesday, September17, 2019 L-36.com


Marine Weather and Tides
Groton Long Point, CT

Version 3.4
NOTICE
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 6:29AMSunset 6:56PM Tuesday September 17, 2019 4:37 PM EDT (20:37 UTC) Moonrise 8:54PMMoonset 9:33AM Illumination 86% Phase: Waning Gibbous; Moon at 18 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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ANZ237 Block Island Sound- 408 Pm Edt Tue Sep 17 2019
Tonight..E winds 10 to 15 kt with gusts up to 20 kt, becoming ne 5 to 10 kt after midnight. Seas around 3 ft.
Wed..NE winds 10 to 15 kt with gusts up to 20 kt. Seas 3 to 4 ft.
Wed night..NE winds 10 to 15 kt with gusts up to 20 kt. Seas around 4 ft.
Thu..NE winds 5 to 10 kt. Gusts up to 20 kt in the morning. Seas around 5 ft.
Thu night..NE winds 5 to 10 kt, becoming N after midnight. Seas around 5 ft.
Fri..W winds 5 to 10 kt. Seas around 6 ft.
Fri night..W winds 5 to 10 kt. Seas 4 to 5 ft.
Sat..NW winds around 5 kt, becoming sw in the afternoon. Seas 3 to 4 ft.
Sat night..SW winds around 5 kt. Seas 2 to 3 ft.
Sun..SW winds 5 to 10 kt. Gusts up to 20 kt in the afternoon. Seas 2 to 3 ft.
Sun night..SW winds around 10 kt. Seas around 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 408 Pm Edt Tue Sep 17 2019
Synopsis for massachusetts and rhode island coastal waters.. High pres builds slowly S across the waters tonight through Thu, then builds S of the waters Fri through Sun. 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 Groton Long Point borough, CT
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location: 41.3, -71.99     debug


Area Discussion for - Boston, MA
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Fxus61 kbox 171943
afdbox
area forecast discussion
national weather service boston norton ma
343 pm edt Tue sep 17 2019

Synopsis
High pressure will maintain an extended period of dry weather
into the weekend other than perhaps a brief spot
shower sprinkle tonight into Wednesday morning. Cool
temperatures into Thursday will moderate by Friday with
unseasonably warm afternoons this weekend into Monday. Distant
hurricane humberto will bring high surf and dangerous rip
currents late this week, which should peak on Friday. A cold
front may finally bring a few brief showers sometime Monday
and or Monday night, but if any rain occurs amounts will be
light.

Near term until 6 am Wednesday morning
Upper trough over the maritimes with upper jet flow crossing new
england as it circles the trough. One shortwave moved through
the flow and across our area this morning and midday, bringing
cold advection aloft and helping trigger the clouds that formed
across eastern and central ma ri NE ct.

That shortwave has moved off, but a second will move through the
flow tonight, generating another period of clouds. But the air
is dry beneath the clouds, and so we expect only isolated
sprinkles light showers during the overnight.

Temperatures upstream last night were in the 40s. We will
forecast min temps of 40s to low 50s.

Short term 6 am Wednesday morning through Wednesday night
Upper shortwave overhead first thing Wednesday morning, but
moves off to the southeast during the day. So we may start the
day with a period of clouds until the shortwave moves offshore.

Could also be an isolated shower.

High pressure will build over new england and the maritimes,
bringing clearing skies and northeast wind. The strongest winds
will be along the south coast and islands with sustained 10-20
kt and gusts 20-25 kt.

Temps aloft will be 4-6c, which suggest high temps in the 60s.

High pressure brings clear skies and light wind Wednesday night.

Min temperatures upstream under the high were mostly in the 40s
but with a report of 38 in northern ontario. We will go with
upper 30s to mid 40s inland and 45-50 along the coast.

Long term Thursday through Tuesday
Highlights...

* extended period of dry weather continues through the weekend
* above normal temps return Fri with 80s likely Sat Sun mon
* high surf dangerous rip current late this week peaking on fri
details...

Thursday and Friday...

upper level ridging over the south central states will expand
northeastward Thu and fri. This warming process will be a bit
delayed at the surface on Thu given high pressure overhead and a
rather chilly start. Nonetheless, plenty of sunshine should allow
highs Thu afternoon to recover into the 60s to around 70. Light
winds and a dry airmass in place should allow for good radiational
cooling Thu night early Fri morning. Low temps by daybreak Fri will
be well down into the 40s with a few upper 30s possible in the
normally coolest outlying locations. Plenty of sunshine Fri and
higher heights better mixing should allow for afternoon highs to
recover well into the 70s to near 80.

Saturday Sunday Monday...

the upper level ridge of high pressure over the southeast states
will push a bit further southwest. This will allow a better
southwest flow of air aloft and even warmer temperatures this
weekend into mon. We expect high temperatures reaching into the 80s
this weekend and Mon across many locations. These highs will be
close to 15 degrees above normal for this time of year.

As for precipitation chances, surface high pressure will remain in
control this weekend allowing the prolonged period of dry weather to
continue. An approaching cold front may bring a few brief showers
sometime Mon and or Mon night, but deeper moisture instability will
be lacking so any rainfall that occurs should be light and short-
lived.

Tuesday...

somewhat cooler air should move into the region behind Monday's cold
front. Still probably will have highs reach into the 70s across
much of the region with mainly dry weather.

High surf & dangerous rip currents from distant humberto...

hurricane humberto well east of the carolina coast will continue to
lift northeast. It will pass well east of our latitude by Friday
with no impacts other than swell resulting in high surf dangerous
rip currents to some of our ocean exposed beaches late this
week. The main time frame of concern is Thu through Sat with the
worst of it peaking on Friday. Given the above normal
temperatures by Fri Sat and ideal late season beach weather,
there is concern for beachgoers. A high surf advisory may
eventually be needed by Fri and perhaps lingering into sat.

Conditions on the beaches should improve by sun.

Aviation 20z Tuesday through Sunday
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Wednesday night ...

remainder of this afternoon... VFR, with cloud bases around
4500 feet. Best chance of clouds will be over ri, NE ct, and eastern
and central ma. North to northeast wind 10-20 mph.

Tonight and Wednesday...

mainlyVFR. A period of ceilings at 3000-4000 feet and isolated
shower over eastern and central ma and parts of ri through
Wednesday morning.

Wednesday night...

clearing skies and light wind. Temperatures after midnight into
the upper 30s to mid 40s.

Kbos terminal... High confidence in taf.

Kbdl terminal... High confidence in taf.

Outlook Thursday through Sunday ...

Thursday through Sunday:VFR.

Marine
Forecaster confidence levels...

low - less than 30 percent.

Moderate - 30 to 60 percent.

High - greater than 60 percent.

Short term through Wednesday night ... High confidence.

Tonight...

high pressure to our north will bring northeast winds and 10-20
kt speeds. This will build seas slowly, with the southern outer
waters reaching 5 feet toward morning. A small craft advisory
has been issued for the outer waters for tonight.

Wednesday...

northeast winds continue during the day, diminishing late. Winds
expected at 20-25 kt on the southern waters, 15-20 kt on the
eastern ma waters and narragansett bay. Seas should reach 5-7
feet on the outer waters. The small craft advisory will expand
into ri sound and nantucket sound during the day.

Wednesday night...

high pressure builds over the waters at night. Winds and seas
will linger on the outer waters but diminish nearshore. Small
craft advisory continues on the outer waters.

Outlook Thursday through Sunday ... Moderate confidence.

Thursday through Thursday night: winds less than 25 kt. Areas
of rough seas.

Friday: winds less than 25 kt. Rough seas up to 12 ft.

Friday night: winds less than 25 kt. Rough seas up to 10 ft.

Saturday: winds less than 25 kt. Seas up to 5 ft.

Saturday night: winds less than 25 kt. Seas locally approaching
5 ft.

Sunday: winds less than 25 kt.

Box watches warnings advisories
Ct... None.

Ma... None.

Ri... None.

Marine... Small craft advisory from 11 am Wednesday to midnight edt
Wednesday night for anz232.

Small craft advisory from 2 pm Wednesday to 2 am edt Thursday
for anz235.

Small craft advisory from 2 am Wednesday to 6 am edt Thursday
for anz250-254>256.

Synopsis... Wtb frank
near term... Wtb
short term... Wtb
long term... Frank
aviation... Wtb frank
marine... Wtb frank


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LDLC3 - New London Ledge CT - Ledge Light Weather 5 mi38 min N 12 G 16 71°F 1018.4 hPa (-0.3)45°F
NLNC3 - 8461490 - New London, CT 7 mi56 min NE 4.1 G 8 70°F 69°F1019 hPa
MTKN6 - 8510560 - Montauk, NY 17 mi56 min 69°F 70°F1019.3 hPa
QPTR1 - 8454049 - Quonset Point, RI 37 mi56 min NNE 12 G 16 1019.7 hPa
NWPR1 - 8452660 - Newport, RI 38 mi56 min NNE 13 G 19 67°F 63°F1019.6 hPa
NAXR1 - Narragansett Bay Reserve, RI 42 mi113 min NE 12 72°F 1020 hPa53°F
PRUR1 42 mi56 min 68°F 49°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 42 mi50 min ENE 9.9 G 13 68°F 1020.3 hPa
CPTR1 - 8452944 - Conimicut Light, RI 45 mi50 min NE 11 G 15 67°F 69°F1019.7 hPa
FOXR1 - 8454000 - Providence, RI 47 mi50 min ENE 9.9 G 14 67°F 67°F1019.8 hPa
PVDR1 47 mi56 min NE 9.9 G 14 68°F 1020.1 hPa50°F
NWHC3 - 8465705 - New Haven, CT 49 mi50 min NE 9.9 G 14 73°F 71°F1018.2 hPa

Wind History for New London, CT
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Groton / New London, Groton / New London Airport, CT4 mi1.7 hrsN 1210.00 miPartly Cloudy74°F46°F38%1019 hPa
Westerly, Westerly State Airport, RI11 mi45 minN 810.00 miA Few Clouds72°F48°F43%1019.4 hPa
Montauk, Montauk Airport, NY16 mi44 minVar 5 mi70°F50°F49%1019.7 hPa
Block Island State Airport, RI23 mi42 minENE 910.00 miA Few Clouds0°F0°F%0 hPa

Link to 5 minute data for KGON

Wind History from GON (wind in knots)
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Last 24hrSW11------Calm--N6----------CalmN4N4----N8N12N15
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1 day agoSW8W7W5W4------------NE3----CalmCalm------NW3NW5W5NW9NW5N6
2 days agoS12S13S11S13S10--------------------NW3--NW11NW64--SW11SW9SW10

Tide / Current Tables for Noank, Mystic River entrance, Connecticut
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Noank
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Tue -- 06:11 AM EDT     0.45 feet Low Tide
Tue -- 06:30 AM EDT     Sunrise
Tue -- 09:33 AM EDT     Moonset
Tue -- 11:40 AM EDT     2.68 feet High Tide
Tue -- 06:42 PM EDT     0.42 feet Low Tide
Tue -- 06:54 PM EDT     Sunset
Tue -- 08:53 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.42.21.71.30.90.60.50.61.11.82.32.62.72.421.51.10.80.50.40.81.41.92.3

Tide / Current Tables for The Race, Long Island Sound, New York Current
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The Race
Click for Map
Tue -- 01:52 AM EDT     -0.00 knots Slack
Tue -- 04:58 AM EDT     -2.87 knots Max Ebb
Tue -- 06:30 AM EDT     Sunrise
Tue -- 08:01 AM EDT     0.01 knots Slack
Tue -- 09:33 AM EDT     Moonset
Tue -- 10:56 AM EDT     2.71 knots Max Flood
Tue -- 02:07 PM EDT     -0.01 knots Slack
Tue -- 05:19 PM EDT     -2.97 knots Max Ebb
Tue -- 06:54 PM EDT     Sunset
Tue -- 08:28 PM EDT     0.01 knots Slack
Tue -- 08:53 PM EDT     Moonrise
Tue -- 11:19 PM EDT     2.54 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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21-0.2-1.5-2.5-2.9-2.4-1.4-01.32.32.72.31.30.2-1.1-2.3-2.9-2.8-1.9-0.60.71.82.5

Weather Map
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GEOS 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.
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Wind Forecast for Boston, MA (16,3,4,5)
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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.