Wednesday, March29, 2017 L-36.com


Marine Weather and Tides
Old Greenwich, 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 6:39AMSunset 7:18PM Wednesday March 29, 2017 1:25 AM EDT (05:25 UTC) Moonrise 7:52AMMoonset 9:15PM Illumination 3% Phase: Waxing Crescent; Moon at 2 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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ANZ335 Long Island Sound West Of New Haven Ct/port Jefferson Ny- 955 Pm Edt Tue Mar 28 2017
Overnight..N winds 5 to 10 kt. Seas 1 ft or less. Patchy fog before midnight. Rain likely...ending around midnight. Vsby 1 to 3 nm...improving around midnight.
Wed..N winds 10 to 15 kt with occasional gusts up to 25 kt. Seas 1 ft or less.
Wed night..N winds 10 to 15 kt with gusts up to 30 kt. Seas around 2 ft in the evening...then 1 ft or less.
Thu..N winds around 10 kt with gusts up to 20 kt...becoming nw in the afternoon. Seas 1 ft or less.
Thu night..S winds around 5 kt. Seas 1 ft or less. Chance of rain after midnight.
Fri..SE winds 5 to 10 kt...increasing to 10 to 15 kt with gusts up to 20 kt in the afternoon. Seas 1 ft or less...then 1 to 2 ft in the afternoon. Rain.
Fri night..E winds 10 to 15 kt. Seas 1 to 2 ft. Rain.
Sat..N winds 10 to 15 kt...diminishing to 5 to 10 kt after midnight. Seas around 2 ft...then 1 ft or less. Rain likely in the morning...then chance of rain at night.
Sun..NW winds 5 to 10 kt. Seas 1 ft or less.
ANZ300 955 Pm Edt Tue Mar 28 2017
Synopsis for long island waters and new york harbor.. Low pressure will move southeast of long island tonight followed by high pressure Wednesday through the day Thursday. Low pressure approaching from the central states will impact the region Thursday night into Saturday. High pressure will build in on Sunday.

7 Day Forecast for Marine Location Near Old Greenwich, CT
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location: 41.01, -73.57     debug


Area Discussion for - New York City/Upton, NY
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Fxus61 kokx 290235
afdokx
area forecast discussion
national weather service new york ny
1035 pm edt Tue mar 28 2017

Synopsis
Low pressure will move southeast of long island tonight followed
by high pressure Wednesday through the day Thursday. Low
pressure approaching from the central states will impact the
region Thursday night into Saturday. High pressure will build in
on Sunday and Monday. Another disturbance may affect the area
next Tuesday.

Near term /until 6 am Wednesday morning/
Based on current observations and near term forecast trends,
only minor updates were made to the near term forecast.

The combination of both a weak upper level short wave and low
pressure just south of long island is producing widespread rain
and mainly light fog across the entire local area.

Radar estimated hourly rainfall rates up to .8 is likely causing
minor urban flooding of low lying and poor drainage areas across
the north shore of suffolk county, NW of the sfc low.

Otherwise, the latest animated satellite imagery shows the back
edge of enhanced clouds across eastern nj, where light rain is
still occurring.

Still holding with rain tapering off aft 03z w-e, ending by 09z
extreme east sections.

Used a guidance blend for lows tonight, with lower 40s invof
nyc, upper 30s most elsewhere, and isolated mid 30s well inland.

Short term /6 am Wednesday morning through Wednesday night/
Dry weather with a northwesterly breeze. Despite a cooler deep
layer air mass in place, sfc temperatures will actually be
warmer than Tuesday because of deep mixing. Mostly sunny skies
are progged, with some fair weather CU especially NW of nyc.

Took the high side of guidance for temps, with mid/upper 50s
most places, and upper 40s/lower 50s in the higher elevations.

Guidance may be underdone by quite a bit on winds for wed
evening as low pressure off to the east intensifies. Model
soundings out east show winds 35-40 kt atop the mixed layer.

Trended forecast higher, with gusts up to 25 lasting until about
midnight.

Lows should be in the mid 30s INVOF nyc, lower 30s along the
coastlines and in the nyc suburbs, and 25-30 elsewhere.

Long term /Thursday through Tuesday/
High pressure builds in for Thursday, then moves offshore Thursday
night. High temperatures on Thursday will be in the low to mid 50s.

Clouds will increase Thursday night as warm advection begins to move
in ahead of an approaching low pressure system. Expect periods of
rain starting Thursday night into Saturday. Some lingering cold air
across the northern portions of our CWA Thursday night may result in
a mix of snow and rain before warm advection increases. So have kept
the mix of snow and rain inland. High temperatures on Friday and
Saturday will be in the mid 40s to around 50.

Canadian high pressure builds in for late Saturday night into
Monday. Another disturbance may approach for Tuesday. Temperatures
during this period will be in the mid to upper 50s which is near
normal for this time of year.

Aviation /02z Wednesday through Sunday/
Low pressure along a frontal boundary moves east of the region
overnight, with winds backing from NE to NW at near 10 kt or
less. High pressure builds in thereafter through Wednesday.

The conditions have begun improving after the exit of the bulk
of the rain as winds become more northerly. Mainly MVFR
conditions are occurring with some isolatedVFR and ifr. As
winds become more NW early Wednesday, conditions will eventually
improve toVFR for all terminals.VFR for Wednesday overall but
with NW gusts near 20 kt during the day.

Amendments will be likely as categories forecast could vary from
observed by 1-2 categories at times tonight.

Outlook for 00z Thursday through Sunday
Wednesday night Vfr. N-nw gusts near 20kt subside early.

Thursday Vfr.

Friday A wintry mix possible early north and west with ifr
conditions possible before a change to rain, otherwise subVFR
conditions with rain elsewhere.

Friday night and Saturday Chance of rain with MVFR or lower
conditions. E winds g20-25kt at coastal terminals for Saturday.

Sunday Vfr.

Marine
Winds and seas will remain below advy levels through tonight,
but could briefly come close on the ocean tonight as NE winds
increase on the back side of departing low pressure. Advy level
winds are also possible on the ocean on Wed in the morning.

Given the marginal nature of these winds, have not yet issued
sca.

Gusts 25-30 kt are likely on all waters Wed night as low
pressure to the east intensifies and high pressure builds from
the west. Some 5-ft seas could linger into early Thu morning.

Potential for small craft advisory conditions increases from
late day Friday through Saturday night with increasing
southeasterly winds ahead of an approaching system.

Hydrology
Additional basin average rainfall of 1/4 to 1/2 inch possible
into the first half of tonight as low pressure develops south
of long island and rain fills back in. Event total rainfall for
most of the area will be between 1/2 to 3/4 inch, with higher
totals above 1 inch on parts of long island where tstms passed
across earlier today. No additional hydrologic concerns
anticipated through tonight.

Additional rainfall of 1/2 inch to 1 inch is possible Thursday
night through Saturday. No hydrologic concerns anticipated.

Tides/coastal flooding
Astronomical tides remain high due to a recent new moon. Water
levels may approach minor flood thresholds during the high tide
cycles tonight, with minor flooding possible Friday night as a
low pressure system approaches.

Okx watches/warnings/advisories
Ct... None.

Ny... None.

Nj... None.

Marine... None.

Synopsis... Gc/fig/goodman
near term... Gc
short term... Goodman
long term... Fig
aviation... Jm
marine... Gc/fig/goodman
hydrology... Fig/goodman
tides/coastal flooding...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44040 - Western Long Island Sound 4 mi40 min WNW 1.9 G 3.9 39°F 1 ft38°F
KPTN6 - 8516945 - Kings Point, NY 17 mi37 min Calm G 0 39°F 39°F1013.5 hPa
BRHC3 - 8467150 - Bridgeport, CT 24 mi37 min N 2.9 G 5.1 43°F 1012.8 hPa
BATN6 - 8518750 - The Battery, NY 32 mi37 min 44°F 42°F1013.4 hPa
ROBN4 - 8530973 - Robins Reef, NJ 36 mi37 min NNW 6 G 7 44°F 1013.9 hPa
MHRN6 40 mi37 min N 5.1 G 6
BGNN4 - 8519483 - Bergen Point West Reach, NJ 40 mi37 min 44°F 43°F1013.7 hPa
NWHC3 - 8465705 - New Haven, CT 40 mi37 min NE 7 G 12 42°F 40°F1013.4 hPa
SDHN4 - 8531680 - Sandy Hook, NJ 44 mi37 min NNW 4.1 G 5.1 43°F 42°F1012.7 hPa
44065 - Entrance to New York Harbor 45 mi35 min NNW 7.8 G 9.7 43°F 42°F3 ft1013.4 hPa (-0.0)42°F
44039 - Central Long Island Sound 49 mi85 min ENE 1.9 G 1.9 40°F 1 ft

Wind History for Kings Point, NY
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
White Plains - Westchester County Airport, NY9 mi89 minNNW 310.00 miOvercast43°F41°F93%1013.5 hPa
Farmingdale - Republic Airport, NY21 mi32 minN 610.00 miOvercast43°F42°F97%1013.2 hPa
New York, La Guardia Airport, NY23 mi34 minNW 57.00 miOvercast44°F41°F89%1013.6 hPa

Wind History from HPN (wind in knots)
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Last 24hrE3E3SE6SE8E3E8E5E6E8E5E7E8SE3E5E10E10E7E5CalmNW5N5NE5N3W6
1 day agoE8E8E8
G16
E7E9E6E8N3E3E3E3CalmCalmCalmNW4SE3CalmCalmCalmE3CalmN3CalmSE5
2 days agoE8E6E8NE8E8NE6E8E7E9
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Tide / Current Tables for Cos Cob Harbor, Connecticut
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Cos Cob Harbor
Click for Map
Wed -- 12:41 AM EDT     8.66 feet High Tide
Wed -- 06:42 AM EDT     Sunrise
Wed -- 07:10 AM EDT     -1.05 feet Low Tide
Wed -- 07:52 AM EDT     Moonrise
Wed -- 01:09 PM EDT     8.27 feet High Tide
Wed -- 07:16 PM EDT     Sunset
Wed -- 07:26 PM EDT     -0.76 feet Low Tide
Wed -- 09:15 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
8.48.67.65.73.51.4-0.3-1-0.61.13.45.77.48.27.86.34.32.10.4-0.6-0.50.83.15.5

Tide / Current Tables for Throg's Neck, Long Island Sound, New York Current
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Throg's Neck
Click for Map
Wed -- 01:26 AM EDT     -0.88 knots Max Ebb
Wed -- 04:06 AM EDT     0.00 knots Slack
Wed -- 06:43 AM EDT     Sunrise
Wed -- 07:46 AM EDT     1.16 knots Max Flood
Wed -- 07:53 AM EDT     Moonrise
Wed -- 10:21 AM EDT     -0.00 knots Slack
Wed -- 01:52 PM EDT     -0.85 knots Max Ebb
Wed -- 04:29 PM EDT     0.00 knots Slack
Wed -- 07:17 PM EDT     Sunset
Wed -- 08:11 PM EDT     1.12 knots Max Flood
Wed -- 09:15 PM EDT     Moonset
Wed -- 10:37 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.6-0.9-0.8-0.5-00.20.511.10.70.1-0.2-0.5-0.8-0.9-0.6-0.20.20.40.71.10.90.3-0.1

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 (1,6,7,8)
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Ground Weather Radar Station Upton, NY
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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.