Sunday, May20, 2018 L-36.com


Marine Weather and Tides
Niantic, CT

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 5:22AMSunset 8:07PM Sunday May 20, 2018 1:46 PM EDT (17:46 UTC) Moonrise 10:37AMMoonset 12:28AM Illumination 33% Phase: Waxing Crescent; Moon at 6 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- 1246 Pm Edt Sun May 20 2018
This afternoon..SW winds around 15 kt. Seas 2 to 3 ft. Scattered showers with isolated tstms.
Tonight..NW winds 5 to 10 kt. Seas around 2 ft. Chance of showers in the evening.
Mon..N winds around 5 kt, becoming sw in the afternoon. Seas 1 ft or less.
Mon night..SW winds 5 to 10 kt, diminishing to around 5 kt after midnight. Seas 1 ft or less.
Tue..SE winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Seas 1 ft or less. Chance of rain.
Tue night..S winds 5 to 10 kt. Seas 1 ft or less. Chance of showers in the evening.
Wed..W winds 5 to 10 kt. Seas 1 ft or less.
Wed night..W winds 5 to 10 kt, becoming nw after midnight. Seas 1 ft or less.
Thu..NW winds around 5 kt, becoming sw in the afternoon. Seas 1 ft or less.
Thu night..SW winds 5 to 10 kt. Seas 1 ft or less. Winds and seas higher in and near tstms.
ANZ300 1246 Pm Edt Sun May 20 2018
Synopsis for the long island waters and new york harbor.. A cold front moves across the region today, followed by high pressure tonight and Monday. A weak frontal system will affect the area from late Monday night into Wednesday. High pressure returns to close out the week.

7 Day Forecast for Marine Location Near Niantic, CT
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location: 41.23, -72.24     debug


Area Discussion for - New York City/Upton, NY
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Fxus61 kokx 201653
afdokx
area forecast discussion
national weather service new york ny
1253 pm edt Sun may 20 2018

Synopsis
A cold front slowly crosses the area this afternoon. High
pressure will briefly build into the region tonight and Monday,
before a weak frontal system affects the area from late Monday
night into Wednesday. High pressure returns to close out the
week.

Near term until 6 pm this evening
Forecast remains on track, with a few showers developing west of
the region and moving east. Minor updates with this afternoon
forecast to temperatures dewpoints to reflect current
observations.

Otherwise, a weak cold front slowly passes through the region
this aft eve. Sct showers and iso tstms are expected to develop
along the cold front, to the NW of the nyc metro, in a
marginally unstable airmass early this afternoon. This activity
should traverse eastward through through the afternoon. Some
uncertainty on extent of convective coverage with subsidence in
wake of morning convection and late approach of next piece of
shortwave energy. With marginally strong deep layer shear, a
conditional isolated strong thunderstorm with strong wind gust
is possible with if pockets of higher instability develop.

Expectation is for convection to weaken as it moves eastward
towards the coast in the late aft eve due to maritime influence.

Temperatures today will be above seasonable, well into the 70s,
except lower 80s for nyc nj metro.

Short term 6 pm this evening through 6 pm Monday
A couple of shortwaves move east through quebec tonight, with
zonal upper flow developing across the region into Monday. At
the surface, high pressure builds into the region through
Monday.

Clearing conditions expected tonight, with mostly sunny
conditions on Sunday. Temps tonight will be near seasonable,
with highs on Monday a few degrees above seasonable levels.

Highs generally in the mid to upper 70s, except lower 70s across
south coasts with afternoon seabreeze development.

Long term Monday night through Saturday
The upcoming week looks to be relatively benign with a weak
frontal system impacting the area late Monday night into early
Wednesday. There are some small timing differences with the
global models with both the onset of warm advection rain Monday
night and the possibility of scattered convection lingering
into Wednesday as the airmass change behind a cold front is
subtle. This does not look to be a significant rainfall event.

Additionally, while the westerlies and an upper trough will
remain across the area through midweek, the instability at this
time looks to be only marginal.

The second half of the week will feature building heights aloft
as the trough works offshore, resulting in dry weather and
above normal temperatures.

Aviation 18z Sunday through Friday
A cold front passes late this aftn.

MVFR CIGS improve toVFR this aftn. Iso sct shower or TSTM this
afternoon mainly after 19 20z. TSTM probability too low to include
in tafs at this time. Will go with vcsh for now.

Sw winds around 10 kt with gusts up to 20 kt bcmg W this aftn, then
finally NW early evening. Winds diminish tonight.

Outlook for 12z Monday through Thursday
Monday Vfr with light S winds.

Tuesday-Wednesday Most likelyVFR with low chance of MVFR in
any shower. S winds g15-20kt possible Tuesday afternoon.

Wednesday night-Thursday Vfr. N-nw winds g15-20kt possible.

Marine
Marginal SCA conditions are expected across the coastal ocean
waters into tonight, with sub small craft conditions expected
elsewhere.

A weak gradient is expected Monday through Wednesday, keeping all
waters below small craft advisory levels.

Hydrology
No widespread significant hydrologic issues are anticipated
through early next week.

Okx watches warnings advisories
Ct... None.

Ny... None.

Nj... None.

Marine... Small craft advisory until 11 pm edt this evening for anz350-
353-355.



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LDLC3 - New London Ledge CT - Ledge Light Weather 10 mi36 min WSW 7 G 8 59°F 59°F
NLNC3 - 8461490 - New London, CT 12 mi46 min SSW 8 G 11 66°F 51°F1012.6 hPa (-1.3)
MTKN6 - 8510560 - Montauk, NY 19 mi46 min 60°F 50°F1013.3 hPa (-1.1)
44039 - Central Long Island Sound 23 mi106 min SSW 7.8 G 9.7 58°F 1 ft
NWHC3 - 8465705 - New Haven, CT 36 mi46 min SSW 8.9 G 9.9 62°F 56°F1012.8 hPa (-1.4)
44017 - 23 Nautical Miles Southwest of Montauk Point, NY 38 mi56 min SW 18 G 19 55°F 51°F5 ft1014 hPa (-1.3)55°F

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, CT12 mi1.8 hrsSW 30.50 miFog60°F60°F100%1013.4 hPa
Chester, Chester Airport, CT18 mi51 minSW 98.00 miOvercast75°F69°F83%1013.2 hPa
Montauk, Montauk Airport, NY20 mi52 minSW 8 G 15 mi65°F61°F87%1013.7 hPa

Wind History from GON (wind in knots)
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Last 24hrE9E13
G20
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G20
E9
G16
E4E5E3CalmSE3S3CalmS5S6SW7SW6SW6SW9SW10SW10SW6S5SW3SW6
1 day agoNE14
G21
NE12E11E9NE11E13NE11NE7NE6NE6NE7NE8NE10NE6N7NE10E10E8NE10NE8NE10NE11E8E10
2 days agoSW5S4S6S5S5S3S4CalmS3CalmCalmCalmS3CalmN7NE10NE13NE14
G26
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G20
NE17NE16
G22
NE18
G21
NE13NE16

Tide / Current Tables for Plum Gut Harbor, Plum Island, Long Island, New York
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Plum Gut Harbor
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Sun -- 12:28 AM EDT     Moonset
Sun -- 02:12 AM EDT     3.33 feet High Tide
Sun -- 05:26 AM EDT     Sunrise
Sun -- 08:57 AM EDT     -0.16 feet Low Tide
Sun -- 10:37 AM EDT     Moonrise
Sun -- 02:52 PM EDT     2.74 feet High Tide
Sun -- 08:05 PM EDT     Sunset
Sun -- 09:11 PM EDT     0.32 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.63.13.33.22.82.11.50.70.1-0.20.10.81.62.22.62.72.52.11.61.10.60.30.51.1

Tide / Current Tables for The Race, Long Island Sound, New York Current
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The Race
Click for Map
Sun -- 12:27 AM EDT     Moonset
Sun -- 12:36 AM EDT     3.08 knots Max Flood
Sun -- 03:51 AM EDT     -0.00 knots Slack
Sun -- 05:25 AM EDT     Sunrise
Sun -- 07:04 AM EDT     -3.55 knots Max Ebb
Sun -- 10:23 AM EDT     0.00 knots Slack
Sun -- 10:36 AM EDT     Moonrise
Sun -- 01:14 PM EDT     2.99 knots Max Flood
Sun -- 04:36 PM EDT     -0.00 knots Slack
Sun -- 07:35 PM EDT     -3.03 knots Max Ebb
Sun -- 08:04 PM EDT     Sunset
Sun -- 10:45 PM EDT     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
2.932.31.2-0.2-1.8-3-3.6-3.2-2-0.612.332.820.8-0.6-2-2.9-3-2.2-10.4

Weather Map and Satellite Images
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wmap_A
GOES 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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for New York City/Upton, NY (13,3,4,5)
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Ground Weather Radar Station Upton, NY
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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.