Sunday, January21, 2018 L-36.com


Marine Weather and Tides
Greenport, NY

Version 3.4
What's New / NOTES
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.
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 7:08AMSunset 4:55PM Sunday January 21, 2018 7:54 AM EST (12:54 UTC) Moonrise 10:43AMMoonset 10:26PM Illumination 23% Phase: Waxing Crescent; Moon at 5 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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ANZ340 Peconic And Gardiners Bays- 613 Am Est Sun Jan 21 2018
Today..W winds around 5 kt. Waves 1 ft or less.
Tonight..W winds around 5 kt, becoming nw after midnight. Waves 1 ft or less. Chance of rain with patchy drizzle after midnight. Patchy fog after midnight with vsby 1 to 3 nm.
Mon..E winds 5 to 10 kt. Waves 1 ft or less. Chance of rain with patchy drizzle. Patchy fog. Vsby 1 to 3 nm.
Mon night..E winds 5 to 10 kt, becoming se 10 to 15 kt after midnight. Waves 1 ft or less. Chance of showers.
Tue..S winds 15 to 20 kt with gusts up to 35 kt. Waves around 2 ft. Rain. Vsby 1 to 3 nm.
Tue night..W winds 15 to 20 kt with gusts up to 25 kt. Waves around 2 ft.
Wed..W winds 15 to 20 kt. Waves 2 to 3 ft.
Wed night..NW winds 10 to 15 kt. Waves around 2 ft.
Thu..NW winds 10 to 15 kt. Waves around 2 ft.
Thu night..NW winds 10 to 15 kt. Waves around 2 ft.
ANZ300 613 Am Est Sun Jan 21 2018
Synopsis for the long island waters and new york harbor.. Weak high pressure will move east through the region today. A warm front will approach the region tonight, slowly working north through the region late Monday into Monday night. A strong frontal system will cross the region on Tuesday, with high pressure returning for the remainder of the week.

7 Day Forecast for Marine Location Near Greenport, NY
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location: 41.1, -72.37     debug


Area Discussion for - New York City/Upton, NY
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Fxus61 kokx 211122
afdokx
area forecast discussion
national weather service new york ny
622 am est Sun jan 21 2018

Synopsis
Weak high pressure will move east through the region today. A
warm front will approach the region tonight, slowly working
north through the region late Monday into Monday night. A strong
frontal system will cross the region on Tuesday, with high
pressure returning for the remainder of the week.

Near term until 6 pm this evening
Zonal upper flow continues today, with confluence of pacific
and polar jet to the north of the region, and southern stream
energy tracking through the deep south.

A glancing shot of canadian air expected today in wake of a weak
cold frontal passage, with polar high pressure building into quebec.

Weak high pressure moves across the region today, providing fair
and tranquil conditions. Mainly expecting a cirrus deck this
morning. NAM has backed off stratus working into the region for
today compared to 24 hrs ago, with the stratus shield over pa
likely having trouble getting east of the appalachians until
late afternoon early evening.

High temps will be several degrees cooler than yesterday, but
still several degrees above seasonable levels (mid 40s interior
to around 50 city coast). If stratus comes in earlier, then
temps will be accordingly cooler.

Short term 6 pm this evening through 6 pm Monday
Models in good agreement with the amplifying trough over the sw
states interacting with subtropical jet energy today. The
resultant deep closed upper low is then expected to track ne
across the central plains and mid mississippi valley tonight
through mon. A large resultant low pressure system will take
similar track through the central us.

Meanwhile the local region will remain under slight ridging, with
pac polar jet confluence well to the north. At the surface, weak
high pressure moves offshore tonight, with a warm front
developing to the south of the region. Stratus and light
precip drizzle appears likely to work into the region tonight
into Monday morning with strong theta-e advection ahead of the
approaching central us system. Models have trended slightly
warmer with low-level temps tonight into Monday, with polar air
staying locked across northern new england. This has reduced
the threat for widespread freezing temps and icing across the
interior, but still potential for interior valley areas of the
lower hudson valley and southern ct to have temps hang around
freezing, resulting in a localized glaze of icing threat.

Ct river valley is most vulnerable.

On Monday, the warm front will likely have trouble moving north
through the region until the LLJ works into the region Monday night.

This based on position of the surface low well west of the
appalachians on Monday and high-res models signaling a weak
cold air damming signal from high pressure nosing down the
coastal plain from SE canada. This will spell chilly conditions
with stratus, drizzle, and light rain showers continuing mon
into Mon eve. Patchy freezing rain drizzle may linger across
interior through Monday morning, particularly in the ct river
valley due to cold air drainage. Highs on Monday will likely
hold in the upper 30s interior to lower 40s city coast.

Long term Monday night through Saturday
Models continue in strong agreement with the closed upper low
tracking through the great lakes Monday night into Tuesday
before beginning to phase with northern stream energy as it
swings into the NE us Tuesday night. At the surface, primary low
pressure tracks through the great lakes Monday night into
Tuesday, while secondary low pressure develops in vicinity of
the region Tuesday and lifts into new england Tuesday night.

Model-to-model and run-to-run consistency continues for a quick
moving moderate to heavy rain event for late Monday night into
Tuesday, in response to strong deep layered lift (region under
of nose of 65-70 kt LLJ and left front quad of a 125+ kt jet
streak in difluent upper flow) of a positive 2-3 std above
normal pwat moisture plume over the region, focused ahead of the
cold front surface wave. Embedded thunder possible as well with
the strong forcing and weak elevated instability. Based on
sref GEFS ensemble model spread, a general 1 2 to 1 inches of
rain is likely across the region late tonight through Tuesday,
with locally 1 to 2 inches. Highest rain amounts will likely be
in path of surface wave and across interior hills due to
orographic enhancement.

Despite a low level inversion, a period of 30 to 40 mph gusts
appears likely for LI SE ct Tue morn aft ahead of cold front as
a 60-70 kt 950mb LLJ works over this region, with a low prob
for a few gusts of 40 to 50 mph being mixed down with
convection heavy rain.

The frontal system pushes through by late Tuesday with drying
conditions Tuesday evening. A breezy NW flow will usher in a
cold and dry airmass for mid to late week, with canadian high
pressure building in for the late week and east for the
weekend.

Aviation 12z Sunday through Thursday
High pressure remains centered to the south through today. A
warm front approaches from the south tonight. InitiallyVFR
conditions will gradually lowering to MVFR tonight with the
approach of the warm front. Ifr conditions will likely develop
towards Monday morning as the warm front stalls across the area.

Winds will generally be light wnw (left of 310) today, gradually
backing to the w-sw in the afternoon. Winds will then become light
and variable tonight as the warm front approaches, remaining
light and at times variable through at least Monday afternoon.

Outlook for 12z Monday through Thursday
Monday... MVFR ifr likely. Chance of -ra. -fzra possible at swf
early Monday morning.

Tuesday Ifr lifr in -ra. Llws. S winds g25kt morning, wsw
winds g30-35kt possible near the coast in the afternoon.

Wednesday Vfr. Wnw g25-30kt.

Thursday Vfr. NW winds g20kt.

Marine
Winds and seas will remain tranquil through today as weak high
pressure shifts northeastward. A warm front then approaches tonight
and slowly moves through Monday, keeping winds light and seas
tranquil. As the warm front moves through Monday night into Tuesday,
southerly flow will rapidly strengthen, with at least sca-level
winds on the waters. A strong low-level jet will lead to the
possibility of at least isolated gale-force winds on Tuesday,
despite an inversion that may hinder the strongest winds from
reaching the waters. Seas will rapidly build in response to the
strengthened flow.

Winds may then briefly decrease Tuesday evening as the cold front
moves through, before strengthening into Tuesday night in strong
cold advection. Expect sca-level gusts Tuesday night into Thursday,
with seas remaining elevated on the ocean waters. High pressure then
begins to build across the area for the late week, with winds
decreasing and seas gradually subsiding.

Hydrology
A frontal system passing through late tonight through Tuesday
is likely to produce a widespread 1 2 to 1 inch of rain, with
locally 1 to 2 inches possible. No significant hydrologic issues
are anticipated at this time.

Equipment
Nyc NOAA weather radio station kwo-35 (162.55 mhz) is off the
air for an extended period of time.

Okx watches warnings advisories
Ct... None.

Ny... None.

Nj... None.

Marine... None.

Synopsis... Nv
near term... Nv
short term... Nv
long term... Nv
aviation... Md
marine... Md
hydrology... Nv
equipment...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44039 - Central Long Island Sound 15 mi55 min SSW 5.8 G 5.8 35°F
LDLC3 - New London Ledge CT - Ledge Light Weather 21 mi45 min WSW 8 G 8.9 36°F 1022.7 hPa29°F
MTKN6 - 8510560 - Montauk, NY 22 mi55 min 40°F 35°F1019.8 hPa (+2.2)
NLNC3 - 8461490 - New London, CT 23 mi55 min NNW 1 G 2.9 29°F 37°F1019.5 hPa (+2.1)
NWHC3 - 8465705 - New Haven, CT 31 mi55 min ENE 4.1 G 4.1 30°F 35°F1020.4 hPa (+2.1)
BRHC3 - 8467150 - Bridgeport, CT 43 mi55 min N 1 G 1.9 1019.9 hPa (+2.3)

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
Chester, Chester Airport, CT21 mi60 minW 310.00 miFair37°F28°F70%1019.3 hPa
Groton / New London, Groton / New London Airport, CT23 mi59 minN 010.00 miFair28°F24°F85%1019.4 hPa
The Gabreski Airport, NY23 mi62 minN 010.00 miFair23°F18°F81%1020.9 hPa
Montauk, Montauk Airport, NY24 mi61 minN 0 mi38°F30°F73%1019.9 hPa

Wind History from SNC (wind in knots)
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W5CalmCalmW5W5W4CalmSW4W6W5W4NW6W4NW4NW6NW5
1 day agoW4W4W644SW64W53CalmSW5SW4CalmCalmSW6S3SW43SW7SW8
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2 days agoCalmCalmCalmCalmN10
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Tide / Current Tables for Greenport, Shelter Island Sound, New York
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Greenport
Click for Map
Sun -- 01:06 AM EST     2.17 feet High Tide
Sun -- 07:06 AM EST     0.20 feet Low Tide
Sun -- 07:09 AM EST     Sunrise
Sun -- 09:42 AM EST     Moonrise
Sun -- 01:13 PM EST     2.32 feet High Tide
Sun -- 04:52 PM EST     Sunset
Sun -- 07:32 PM EST     -0.03 feet Low Tide
Sun -- 09:26 PM EST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
22.22.11.71.20.70.40.20.30.81.41.92.22.32.21.91.30.80.3000.30.91.5

Tide / Current Tables for Shinnecock Canal, Railroad Bridge, New York Current
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Shinnecock Canal
Click for Map
Sun -- 02:57 AM EST     -1.40 knots Max Ebb
Sun -- 06:22 AM EST     0.00 knots Slack
Sun -- 07:09 AM EST     Sunrise
Sun -- 09:03 AM EST     1.37 knots Max Flood
Sun -- 09:43 AM EST     Moonrise
Sun -- 12:12 PM EST     -0.00 knots Slack
Sun -- 03:22 PM EST     -1.55 knots Max Ebb
Sun -- 04:53 PM EST     Sunset
Sun -- 07:06 PM EST     0.00 knots Slack
Sun -- 09:27 PM EST     Moonset
Sun -- 09:33 PM EST     1.25 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.1-0.8-1.3-1.4-1.2-0.7-0.20.411.41.20.80.2-0.7-1.3-1.5-1.5-1.1-0.5-0.10.61.21.20.9

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 (7,2,3,4)
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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.