Tuesday, September18, 2018 L-36.com


Marine Weather and Tides
Groton, CT

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Sunrise 6:31AMSunset 6:53PM Tuesday September 18, 2018 5:56 PM EDT (21:56 UTC) Moonrise 3:25PMMoonset 12:17AM Illumination 65% Phase: Waxing Gibbous; Moon at 9 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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ANZ330 Long Island Sound East Of New Haven Ct/port Jefferson Ny- 425 Pm Edt Tue Sep 18 2018
Tonight..N winds 5 to 10 kt. Seas 1 ft or less. Showers likely early this evening, then slight chance of showers late this evening.
Wed..NE winds 10 to 15 kt with gusts up to 20 kt. Seas 1 ft or less, then 2 to 3 ft in the afternoon.
Wed night..NE winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft.
Thu..E winds 5 to 10 kt. Seas 1 ft or less.
Thu night..SE winds 5 to 10 kt. Seas 1 ft or less.
Fri..S winds 5 to 10 kt, becoming sw 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 ft or less.
Fri night..SW winds 10 to 15 kt with gusts up to 25 kt. Seas 1 ft or less. Chance of showers and tstms after midnight.
Sat..NW winds 10 to 15 kt, becoming N 5 to 10 kt in the afternoon. Seas 1 ft or less.
Sat night..NE winds 5 to 10 kt. Seas 1 ft or less.
Sun..E winds 5 to 10 kt. Seas 1 ft or less.
Sun night..E winds 5 to 10 kt. Seas 1 ft or less. Winds and seas higher in and near tstms.
ANZ300 425 Pm Edt Tue Sep 18 2018
Synopsis for the long island waters and new york harbor.. A cold front will move across the waters early this evening. High pressure then ridges down southeastern canada through Wednesday night. High pressure passes east Thursday and Friday as low pressure moves into canada. Warm front passes to the northwest Friday, followed by a cold front Saturday. The front settles to the south into early next week.


7 Day Forecast for Marine Location Near Groton, CT
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location: 41.3, -72.08     debug


Area Discussion for - New York City/Upton, NY
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Fxus61 kokx 182102
afdokx
area forecast discussion
national weather service new york ny
502 pm edt Tue sep 18 2018

Synopsis
A cold front will move across the region by early this evening.

High pressure then ridges down southeastern canada tonight through
Wednesday night. High pressure passes east Thursday and Friday
as low pressure moves into canada. Warm front passes to the
northwest Friday, followed by a cold front Saturday. The front
settles to the south into early next week as high pressure
builds to the north.

Near term until 6 am Wednesday morning
In terms of weather features, a cold front is making progress
moving through the region. The low attached to this front with
the remnants of florence will be moving into the gulf of maine.

The front and low move farther away from the region tonight into
the atlantic.

For tonight, with the low and front moving farther away, drier
conditions will move into place as surface winds become more
northerly. High pressure will begin to build in tonight from the
great lakes.

The flash flood watch was cancelled as the areas that were in
are just going to get some lingering light to moderate rain with
any heavy rain near the south and eastern sections of long
island which is where there is more thunderstorm potential. The
rain lingers into early this evening with dry conditions
thereafter with high pressure starting to then build in. Mav met
blend was used for low temperatures ranging from the low to
upper 60s.

There remains a high rip current risk into early this evening.

Short term 6 am Wednesday morning through Wednesday night
For Wednesday and Wednesday night, mid and upper level ridging will
gradually move in from the west. At the surface, high pressure will
continue to build in from the north.

There will be an embedded mid level shortwave moving across
Wednesday. The low levels will feature more northerly flow and with
cooling temperatures as flow closer to the surface will be more ne.

Model soundings indicate inversion above the low level NE flow
so could have some times where there are more clouds with
moisture getting trapped below the inversion. The forecast has
more clouds across eastern sections for a period of time
Wednesday and Wednesday night. Overall though, cooler and dry
weather will be the main theme along with less humid conditions.

Temperatures will be on the cooler side from the n-ne flow.

Highs Wednesday range from the mid to upper 70s with lows
Wednesday night ranging from the low 50s to low 60s. Dewpoints
will be lowering into the low 60s Wednesday and mid to upper
50s Wednesday night.

There is a moderate rip current risk for Wednesday for atlantic
ocean beaches.

Long term Thursday through Tuesday
Upper level ridge Thursday and Friday gives way to weakening
shortwave and falling heights this weekend as the upper flow
flattens and the ridge gets suppressed to the south. Heights begin
to rise again ahead of upstream trough early next week, with model
differences in details noted.

At the sfc, ridge of high pressure passes east Thursday and Friday
as low pressure moves into canada. Warm front passes to the nw
Friday, followed by a cold front Saturday.

The front settles to the south into early next week as high
pressure builds to the north. The front likely moves back north as a
warm front ahead of downstream low pressure as it approaches ahead
of aforementioned upper trough.

Temperatures vary through the period. Ahead of the warm front,
expect near normal readings Thursday, with above normal Friday as
area sits in the warm sector. Once the cold front passes, temps
likely fall back to near normal Saturday, below normal Sunday, then
back to near normal early next week.

Aviation 21z Tuesday through Sunday
A cold front passes to the east by evening as high pressure builds
well to the north tonight into Wednesday.

Most of the shower activity is now east of the nyc metro, and
south of long island. Any lingering MVFR, with occasional ifr,
conditions in showers improves this evening. GenerallyVFR is
anticipated tonight into Wednesday morning as skies clear,
although cannot rule out some patchy stratus and fog overnight.

Much of this depends on strength of the northerly winds.

Winds N nw, diminish late this evening and overnight. Northerly
winds pick up Wednesday morning to 10-15 kt. A few gusts to 20
kt is likely.

Ny metro enhanced aviation weather support...

detailed information, including hourly TAF wind component fcsts,
can be found at: http:

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LDLC3 - New London Ledge CT - Ledge Light Weather 0 mi32 min N 12 G 14 72°F 1007.8 hPa69°F
NLNC3 - 8461490 - New London, CT 4 mi39 min NNE 2.9 G 8 72°F 71°F1006.6 hPa
MTKN6 - 8510560 - Montauk, NY 19 mi39 min 71°F 72°F1006.8 hPa
44039 - Central Long Island Sound 32 mi124 min NNE 12 G 16 71°F 74°F1 ft
QPTR1 - 8454049 - Quonset Point, RI 41 mi45 min N 8.9 G 12 71°F 72°F1007.2 hPa
NWPR1 - 8452660 - Newport, RI 42 mi45 min N 6 G 8.9 71°F 69°F1006.9 hPa
44017 - 23 Nautical Miles Southwest of Montauk Point, NY 42 mi67 min W 3.9 G 7.8 72°F 70°F6 ft1007 hPa (-0.4)71°F
NWHC3 - 8465705 - New Haven, CT 44 mi39 min NNE 2.9 G 6 72°F 78°F1007.2 hPa
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 46 mi45 min NE 7 G 8 70°F 1007.3 hPa
NAXR1 - Narragansett Bay Reserve, RI 46 mi72 min NNE 8.9 71°F 1007 hPa71°F
CPTR1 - 8452944 - Conimicut Light, RI 48 mi39 min N 6 G 8 71°F 74°F1007.4 hPa

Wind History for New London, CT
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Groton / New London, Groton / New London Airport, CT3 mi61 minN 73.00 miLight Rain Fog/Mist73°F72°F96%1006.6 hPa
Westerly, Westerly State Airport, RI15 mi64 minNNW 65.00 miLight Rain Fog/Mist74°F73°F100%1007 hPa
Montauk, Montauk Airport, NY17 mi63 minN 0 mi73°F73°F100%1007.2 hPa
Chester, Chester Airport, CT23 mi62 minNNE 53.00 miLight Rain70°F69°F100%1007.8 hPa

Wind History from GON (wind in knots)
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Last 24hrS8S6S6S5SW4S3CalmS5S7S8S10S8S12S15S15SW18
G23
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G21
NW6N4N7
1 day agoS6SE5SE3CalmCalmCalmCalmCalmS4S6S5SW6SW6CalmCalmS5S6S6S6S6S7S6S7S9
2 days agoS5SE3S5S5CalmNE3CalmCalmCalmCalmCalmNE3N3CalmCalmCalmS6S7SW9SW9--S5S4S6

Tide / Current Tables for Silver Eel Pond, Fishers Island, N.Y.
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for The Race, Long Island Sound, New York Current
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Weather Map and Satellite Images
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wmap_A
GOES Local Image of    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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for New York City/Upton, NY (17,4,5,8)
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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.