Monday, April24, 2017 L-36.com


Marine Weather and Tides
Groton, CT

Version 3.4
What's New / NOTES
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.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:52AMSunset 7:40PM Monday April 24, 2017 9:16 AM EDT (13:16 UTC) Moonrise 5:04AMMoonset 5:34PM Illumination 3% Phase: Waning Crescent; Moon at 28 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- 620 Am Edt Mon Apr 24 2017
.small craft advisory in effect from Tuesday morning through Tuesday evening...
Today..SE winds 5 to 10 kt. Seas 1 ft or less.
Tonight..E winds 5 to 10 kt...increasing to 10 to 15 kt with gusts up to 20 kt after midnight. Seas 1 ft or less...then 2 to 3 ft after midnight. Chance of light rain after midnight.
Tue..NE winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Rain.
Tue night..E winds 15 to 20 kt. Gusts up to 25 kt in the evening. Seas 2 to 4 ft. Rain. Vsby 1 to 3 nm.
Wed..E winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 4 ft. Rain likely in the morning...then chance of light rain in the afternoon.
Wed night..E winds 5 to 10 kt. Seas 2 to 3 ft. Chance of light rain in the evening.
Thu..SE winds around 5 kt...becoming s. Seas 2 to 3 ft.
Fri..SW winds 5 to 10 kt. Seas 1 ft or less.
ANZ300 620 Am Edt Mon Apr 24 2017
Synopsis for long island waters and new york harbor.. High pressure moves well east of the southern new england coast today as a wave of low pressure moves off the southeastern coast and begins to track north. The low continues to track up along the eastern seaboard through Thursday. A weak front moves through Friday into Friday night.

7 Day Forecast for Marine Location Near Groton city, 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 241151
afdokx
area forecast discussion
national weather service new york ny
751 am edt Mon apr 24 2017

Synopsis
High pressure moves well east of the southern new england coast
today as a wave of low pressure moves off the southeastern
coast. The low then tracks up along the eastern seaboard
through Thursday. A weak front moves through Friday into Friday
night, lingering near the region next weekend as high pressure
tries to build along the eastern seaboard.

Near term /until 6 pm this evening/
Winds have decoupled and with the cirrus shield just moving
into the region from the south, skies have remained mostly
clear. This has allowed temperatures to fall below forecast
levels and radiational fog to develop. Visibilities were varying
widely with local areas with dense fog at times. Updated for
lows and hourly temperatures and dew points this morning, along
with weather grids to include patchy fog across long island and
connecticut.

Near zonal flow will remain across the northeast today with
weak ridging building in from the atlantic. Meanwhile surface
high pressure east of the southern new england coast will remain
nosed into the northeastern coastal plain. The zonal flow and
high will keep the southern closed off low from progressing to
far north. The trend continues for a delay in the northern
precipitation shield from moving into the area, and solutions
have indicated this. So have kept probabilities at slight chance
along the immediate coast through this afternoon. Mixing will
be limited with a low level inversion setting. Weak warm
advection will occur under cloudy to mostly cloudy conditions
and temperatures should be able to rise to near seasonal levels.

Short term /6 pm this evening through 6 pm Tuesday/
The weak upper ridge remains into Tuesday then weakens while the
mid and lower level ridge weakens. The upper low will be slow to
track north, while a broad weak surface low track north.

Again precipitation will be slow to move north with
probabilities becoming likely by Tuesday morning, and
categorical by Tuesday afternoon. Precipitation will be light
through Tuesday and there may even be a few breaks at times.

Again a strong low level inversion will remain through Tuesday.

So despite an increasing pressure gradient force mixing of the
low level jet winds of 40 to 50 kts will limited.

Long term /Tuesday night through Sunday/
Upper closed low gradually weakens as it moves along the middle
atlantic coast Tuesday night. Surface low and mid/upper level low
are stacked as well, so the overall trend for this system is to fill
as it approaches. The main mechanism for lift Tuesday night is from
isentropic lift as warm and moist air lifts over a warm front to the
south. This lift will be enhanced by a 40-55 kt low level jet. The
strongest portion of the jet is progged to be over long island and
southern connecticut, and this is where highest rainfall totals are
expected. These winds will stay aloft with inverted low level
temperature profiles.

Deep moisture feed around the low off the atlantic will likely lead
to precipitable water values around 200 percent of normal.

Moderate to locally heavy rain will be possible Tuesday night,
especially across long island and southern connecticut. Totals range
from around a half inch west to around an inch east for the Tuesday
night period.

Low level jet and deepest moisture work east Wednesday morning.

Middle levels of the atmosphere dry out as the upper low continues
to track up the coast. The rain should transition to light rain or
possibly some drizzle with low levels remaining saturated through
the day. Saturated low levels look to remain in place Wednesday
night into Thursday as the stacked low slowly moves to the north and
east. Some question as to whether or not there will be any
precipitation. Light rain or possibly drizzle may linger across
portions of long island and southern ct through Wednesday night. A
larger upper trough developing over the CONUS should help to push
the low off to the north and east on Thursday, bringing an end to
any lingering precip. Low clouds may hang on through the day
however.

A weak front move through Friday into Friday night. Moisture and
lift with this front are not impressive, so not expecting anything
more than a few showers at this time. This boundary may linger near
the region into the weekend as upper level ridging builds along the
east coast. Stronger westerlies may remain over or just to our
north, so will need to watch any ripples in the flow as some energy
could ride along the periphery of the ridge from the trough out
west. Will show a dry forecast on Saturday and then slight chance
pops on Sunday.

A warming trend in temperatures is anticipated Wednesday into the
weekend. Highs will continue to increase each day, with temperatures
running 10 to 15 degrees above normal by the weekend. Coolest
locations will be near the coast as afternoon sea breeze
circulations develop.

Aviation /12z Monday through Friday/
Vfr through the first half of this evening as a low-level ridge
across the area gradually gives way to low pressure moving
slowly up the east coast.

Mid and high level ceilings will gradually lower through the day
with the potential for MVFR/ifr conditions in light rain after
06z.

Light and variable winds early this morning, then e/se winds at
10 kt or less. There will likely be some variability of the
flow by 20 degrees with the ridge axis in close proximity. Winds
begin to back around to the e/ne this evening.

Ny metro enhanced aviation weather support...

detailed information, including hourly TAF wind component forecasts,
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 SSW 2.9 G 2.9 50°F 1022 hPa44°F
NLNC3 - 8461490 - New London, CT 4 mi47 min SSE 2.9 G 4.1 48°F 46°F1022.2 hPa
MTKN6 - 8510560 - Montauk, NY 19 mi47 min 48°F 46°F1022.8 hPa
44039 - Central Long Island Sound 32 mi122 min S 5.8 G 7.8 47°F
QPTR1 - 8454049 - Quonset Point, RI 41 mi47 min S 8.9 G 9.9 48°F 48°F1022.6 hPa
NWPR1 - 8452660 - Newport, RI 42 mi47 min SSW 8 G 8.9 48°F 47°F1022.3 hPa
44017 - 23 Nautical Miles Southwest of Montauk Point, NY 42 mi87 min 46°F 46°F3 ft1022.5 hPa (+1.5)46°F
NWHC3 - 8465705 - New Haven, CT 44 mi47 min SSW 5.1 G 5.1 48°F 52°F1022.7 hPa
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 46 mi47 min SW 6 G 9.9 50°F 1022.1 hPa
NAXR1 - Narragansett Bay Reserve, RI 46 mi92 min SW 4.1 48°F 1022 hPa43°F
CPTR1 - 8452944 - Conimicut Light, RI 48 mi47 min S 8.9 G 9.9 46°F 49°F1022.2 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, CT3 mi21 minS 410.00 miFair50°F45°F83%1022.3 hPa
Westerly, Westerly State Airport, RI15 mi24 minVar 410.00 miFair53°F45°F74%1022.8 hPa
Montauk, Montauk Airport, NY17 mi23 minVar 3 mi50°F42°F74%1022.9 hPa
Chester, Chester Airport, CT23 mi22 minN 010.00 miFair54°F42°F67%1022.3 hPa

Wind History from GON (wind in knots)
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Last 24hrNW7--S9S10S8S10S10S10S8S9S7SW6SW5S7SW4SW5CalmCalmCalmCalmN3Calm3S4
1 day agoN8NE9NE6N11N7N8N7NE5NE3S3S3CalmCalmCalmSE3CalmCalmCalmCalmN7N5N4N8N11
2 days agoE12E12
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E12E12E12NE10E9NE7NE6NE4N6N9N11N8N7NE8N10

Tide / Current Tables for Silver Eel Pond, Fishers Island, N.Y.
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Silver Eel Pond
Click for Map
Mon -- 02:28 AM EDT     -0.03 feet Low Tide
Mon -- 05:03 AM EDT     Moonrise
Mon -- 05:54 AM EDT     Sunrise
Mon -- 08:03 AM EDT     2.62 feet High Tide
Mon -- 02:43 PM EDT     -0.03 feet Low Tide
Mon -- 05:33 PM EDT     Moonset
Mon -- 07:38 PM EDT     Sunset
Mon -- 08:24 PM EDT     2.99 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.90.4000.51.322.42.62.521.50.90.50.1-00.41.222.632.92.51.9

Tide / Current Tables for The Race, Long Island Sound, New York Current
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The Race
Click for Map
Mon -- 01:14 AM EDT     -3.49 knots Max Ebb
Mon -- 04:28 AM EDT     0.00 knots Slack
Mon -- 05:03 AM EDT     Moonrise
Mon -- 05:55 AM EDT     Sunrise
Mon -- 07:18 AM EDT     3.12 knots Max Flood
Mon -- 10:34 AM EDT     -0.00 knots Slack
Mon -- 01:36 PM EDT     -3.47 knots Max Ebb
Mon -- 04:43 PM EDT     0.00 knots Slack
Mon -- 05:33 PM EDT     Moonset
Mon -- 07:38 PM EDT     Sunset
Mon -- 07:38 PM EDT     3.40 knots Max Flood
Mon -- 10:53 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-2.8-3.5-3.2-2.2-0.80.92.33.12.92.10.9-0.7-2.3-3.3-3.4-2.6-1.20.52.13.23.32.61.4-0.2

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 New York City/Upton, NY (9,2,3,4)
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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.