Tuesday, April25, 2017 L-36.com


Marine Weather and Tides
Mamaroneck, NY

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 5:58AMSunset 7:47PM Tuesday April 25, 2017 8:39 AM EDT (12:39 UTC) Moonrise 5:46AMMoonset 6:52PM Illumination 0% Phase: New Moon; Moon at 29 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- 748 Am Edt Tue Apr 25 2017
.small craft advisory in effect through late tonight...
Today..E winds 15 to 20 kt with gusts up to 25 kt. Seas 2 to 4 ft. Light rain and drizzle likely this morning...then periods of rain this afternoon with vsby 1 to 3 nm.
Tonight..E winds 15 to 20 kt...diminishing to 10 to 15 kt after midnight. Seas 2 to 4 ft. Rain. Patchy fog after midnight. Vsby 1 to 3 nm.
Wed..NE winds 10 to 15 kt with gusts up to 20 kt...diminishing to 5 to 10 kt in the afternoon. Seas around 2 ft in the morning... Then 1 ft or less. Patchy fog in the morning. Rain likely in the morning...then chance of light rain in the afternoon. Vsby 1 to 3 nm in the morning.
Wed night..NE winds 5 to 10 kt. Seas 1 ft or less.
Thu..N winds around 5 kt...becoming se in the afternoon. Seas 1 ft or less.
Thu night..SE winds around 5 kt. Seas 1 ft or less.
Fri..S winds around 5 kt...becoming sw. Seas 1 ft or less. Chance of showers and tstms in the morning.
Sat..SW winds 5 to 10 kt...becoming W after midnight. Seas 1 ft or less. Winds and seas higher in and near tstms.
ANZ300 748 Am Edt Tue Apr 25 2017
Synopsis for long island waters and new york harbor.. Low pressure slowly tracks up along the eastern seaboard through Wednesday. The low then tracks from southern new england Wednesday night up into the canadian maritimes by the end of the week. A weakening frontal boundary dissipates across the area on Friday, followed by another weak frontal boundary moving into the area Saturday into Saturday night.

7 Day Forecast for Marine Location Near Mamaroneck village, NY
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location: 40.93, -73.73     debug


Area Discussion for - New York City/Upton, NY
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Fxus61 kokx 251155
afdokx
area forecast discussion
national weather service new york ny
755 am edt Tue apr 25 2017

Synopsis
Low pressure slowly tracks up along the eastern seaboard through
Wednesday night. Weakening low pressure along the new england coast
Wednesday night tracks northeast and up into the canadian
maritimes by the end of the week. A weakening frontal boundary
dissipates across the area on Friday, followed by another weak
frontal boundary moving into the area Saturday into Saturday
night. The latter of which stalls out nearby into early next
week.

Near term /until 6 pm this evening/
Made some changes to keep precipitation as mainly light
rain/drizzle this morning, with a more widespread moderate rain
later this afternoon. The nam12 is showing an enhanced area of
rain across eastern li/se ct this morning that will have to
be watched.

High pressure to the north and low pressure along the carolina
coast has set up a maritime easterly flow. Warm front associated
with the low will gradually work northward today. As the upper
level low moves north along the eastern seaboard, moisture and
lift will increase through the day.

The nam- 12km, nam- 3km, and the hrrr show a brief lull in the
precipitation this morning which is verifying based on latest
radar data. This will likely be short-lived as stronger
isentropic lift and deeper moisture work up the east coast ahead
of the low late this morning and into the afternoon.

Fairly strong pressure gradient between the approaching low and high
to the north brings breezy easterly flow through the day with gusts
20-25 mph. Temperatures will be in the 50s.

Short term /6 pm this evening through Wednesday night/
Low level jet and a stacked coastal low will provide good lift
tonight for widespread moderate to locally heavy rainfall.

Precipitable waters increase to near 200% of normal with values 1.50
inches. Models have come into a little better agreement with
placement of heaviest qpf, but it is well known that QPF in models
can be erratic. A very moist airmass, slow moving stacked low, and
low level jet support around 0.50-0.75 inches of rain on average
across the area for the first half of the night. The low level jet
shifts to the east after 06z, which will focus the heaviest rain
across eastern long island and southern connecticut.

Some hints at weak elevated instability on bufkit soundings, but
have left thunder out of the forecast for now. Better instability
still looks to remain to the south and east.

On Wednesday, the stacked low will be slowly moving south and east
of long island. Rain will continue across eastern long island and
southeastern connecticut, tapering off into the afternoon. Due to
moisture wrapping around the low, cannot rule out light rain further
west as well.

The close proximity of the stacked low should keep low clouds
through the day and possibly some patchy fog, so have gone with
the cooler high temperatures in the lower 60s.

It still appears that the entire CWA will fall short of flash flood
and headwater guidance flooding for this event. See the hydrology
section below for more details.

Long term /Thursday through Monday/
A dissipating upper low lifts NE along the new england coast at
the onset of the period, otherwise a high amplitude upper ridge
will prevail along the east coast through early next week.

A series of weak frontal systems will converge upon the area,
the first on Friday, which likely dissipates across the area. A
backdoor cold front then may briefly drop south across the area
Saturday night with a confluent flow aloft and shortwave trough
moving over top the ridge across eastern canada. 00z ecmwf
support GFS with the backdoor cold front making it through, even
faster than the GFS on Saturday afternoon. Rain chances in both
cases are low with ridging aloft and a capping inversion in
place. Expect mainly showers, but an isolated thunderstorm is
not out of the question. Strong and/or severe convection is not
forecast at this time.

Front returns north as a warm front Sunday night into Monday
morning with a cold frontal passage Monday evening. There is the
potential for stronger convection along and ahead of the cold
front Monday.

Anomalous upper ridge off the east coast over the the weekend
into early next week will result in above normal temperatures
and muggy conditions, with readings generally in the 70s and
possibly the lower 80s, warmest across the interior. Conditions
will be cooler along the immediate coast. Sunday and Monday may
cool down a bit behind the backdoor cold front.

Aviation /12z Tuesday through Saturday/
Low pressure slowly moves up along the mid-atlantic coastline today
and tonight.

Conditions gradually deteriorate through the morning and afternoon.

Generally expect ifr CIGS and visibilities, with lifr possible at
times, especially later this afternoon and tonight.

On and off rain this morning should become steadier, and moderate to
heavy in intensity this afternoon and into tonight. The rain should
lighten later tonight.

East/northeast winds prevail, with speeds in the 15 to 20 kt range.

Gusts will range 20 to 30 kt today and into tonight. Gusts should
become less frequent overnight tonight.

Llws is possible this evening with SE winds 45-50 kt at 2kft, mainly
east of nyc terminals.

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
KPTN6 - 8516945 - Kings Point, NY 8 mi81 min E 8 G 14 50°F 47°F1018.6 hPa
44040 - Western Long Island Sound 8 mi84 min E 19 G 29 50°F 4 ft49°F
BATN6 - 8518750 - The Battery, NY 22 mi81 min 51°F 50°F1017.9 hPa
ROBN4 - 8530973 - Robins Reef, NJ 26 mi81 min NE 14 G 18 50°F 1018.5 hPa
MHRN6 30 mi81 min NE 16 G 21
BGNN4 - 8519483 - Bergen Point West Reach, NJ 30 mi81 min 51°F 51°F1018.3 hPa
BRHC3 - 8467150 - Bridgeport, CT 34 mi81 min ENE 8 G 12 51°F 1019.9 hPa
SDHN4 - 8531680 - Sandy Hook, NJ 35 mi81 min NE 7 G 13 51°F 50°F1017 hPa
44069 38 mi99 min ENE 25 G 29 52°F 55°F51°F
44065 - Entrance to New York Harbor 39 mi109 min NE 23 G 27 49°F 49°F6 ft1016.7 hPa (-0.3)48°F

Wind History for Kings Point, NY
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
White Plains - Westchester County Airport, NY10 mi1.7 hrsE 8 G 158.00 miOvercast51°F48°F89%1019.1 hPa
New York, La Guardia Airport, NY13 mi1.8 hrsNE 1510.00 miOvercast52°F48°F86%1018.6 hPa
New York City, Central Park, NY16 mi1.8 hrsE 10 G 2310.00 miOvercast50°F48°F93%1018.7 hPa
Teterboro, Teterboro Airport, NJ18 mi1.8 hrsENE 9 G 155.00 miLight Rain Fog/Mist52°F48°F89%1018.5 hPa
New York, Kennedy International Airport, NY19 mi1.8 hrsNE 142.50 miRain Fog/Mist51°F50°F96%1018.7 hPa
Farmingdale - Republic Airport, NY22 mi1.8 hrsNE 1110.00 miOvercast50°F48°F96%1018.6 hPa

Wind History from HPN (wind in knots)
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Last 24hrSE33SE3E5S7SE6SE6E7--SE8E6E6E7E5E5E5E7E5E7E9E8NE12
G19
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G15
1 day agoN7NE9NW9NW74NW745S7S8S8S6S5S5S4S3CalmCalmCalmCalmNW4CalmCalmCalm
2 days agoN5N5E3N3N9N43SE5SE3NW5NW4NW5W5N10NW9NW8NW8NW10N11N12N11N11N9N9

Tide / Current Tables for Mamaroneck, New York
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Mamaroneck
Click for Map
Tue -- 05:06 AM EDT     -0.61 feet Low Tide
Tue -- 05:45 AM EDT     Moonrise
Tue -- 06:00 AM EDT     Sunrise
Tue -- 10:51 AM EDT     8.21 feet High Tide
Tue -- 05:13 PM EDT     -0.47 feet Low Tide
Tue -- 06:51 PM EDT     Moonset
Tue -- 07:45 PM EDT     Sunset
Tue -- 11:10 PM EDT     8.96 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
7.76.23.71.2-0.2-0.6-0.30.93.46.17.88.27.86.64.51.90.1-0.5-0.30.72.85.88.18.9

Tide / Current Tables for Throg's Neck, Long Island Sound, New York Current
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Throg's Neck
Click for Map
Tue -- 02:08 AM EDT     0.00 knots Slack
Tue -- 05:42 AM EDT     1.14 knots Max Flood
Tue -- 05:46 AM EDT     Moonrise
Tue -- 06:01 AM EDT     Sunrise
Tue -- 08:26 AM EDT     -0.00 knots Slack
Tue -- 11:52 AM EDT     -0.84 knots Max Ebb
Tue -- 02:35 PM EDT     0.00 knots Slack
Tue -- 06:06 PM EDT     1.11 knots Max Flood
Tue -- 06:51 PM EDT     Moonset
Tue -- 07:45 PM EDT     Sunset
Tue -- 08:40 PM EDT     -0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
-0.8-0.5-00.20.511.10.70.1-0.1-0.4-0.7-0.8-0.6-0.20.10.30.81.10.80.3-0.1-0.4-0.7

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 (8,2,3,4)
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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.