Monday, January20, 2020
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L-36.com


Marine Weather and Tides
Larchmont, NY

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 7:13AMSunset 4:58PM Monday January 20, 2020 7:28 AM EST (12:28 UTC) Moonrise 4:22AMMoonset 2:22PM Illumination 22% Phase: Waning Crescent; Moon at 25 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- 635 Am Est Mon Jan 20 2020
.small craft advisory in effect until 10 am est this morning...
Today..N winds 15 to 20 kt with gusts up to 30 kt, diminishing to 10 to 15 kt with gusts up to 20 kt this afternoon. Seas around 2 ft.
Tonight..NW winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt after midnight. Seas around 2 ft in the evening, then 1 ft or less.
Tue..NW winds 5 to 10 kt. Seas 1 ft or less.
Tue night..N winds 5 to 10 kt. Seas 1 ft or less.
Wed..N winds around 5 kt. Seas 1 ft or less.
Wed night..NW winds around 5 kt, becoming N after midnight. Seas 1 ft or less.
Thu..NW winds around 5 kt. Seas 1 ft or less.
Thu night..SW winds around 5 kt, becoming nw after midnight. Seas 1 ft or less.
Fri..NE winds around 5 kt. Seas 1 ft or less.
Fri night..NE winds 5 to 10 kt. Seas 1 ft or less.
ANZ300 635 Am Est Mon Jan 20 2020
Synopsis for the long island waters and new york harbor.. High pressure gradually builds towards region today, then over the waters through the middle of the week. The high will begin to retreat into the maritimes on Fri.


7 Day Forecast for Marine Location Near Larchmont, NY
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location: 40.89, -73.75     debug


Area Discussion for - New York City/Upton, NY
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FXUS61 KOKX 201146 AFDOKX

Area Forecast Discussion National Weather Service New York NY 646 AM EST Mon Jan 20 2020

SYNOPSIS. A Canadian high will builds towards the area today, and set up over the area for most of the week. The high will begin to retreat on Friday, with low pressure potentially impacting the area over the weekend.

NEAR TERM /UNTIL 6 PM THIS EVENING/. High pressure over the upper midwest slowly moves southeast today. A gradual decrease in winds is expected as the gradient weakens somewhat. In spite of a good deal of sunshine today, high temperatures remain below freezing, with the NBM used. Wind chills in the single digits and teens.

SHORT TERM /6 PM THIS EVENING THROUGH 6 AM TUESDAY/. Cold with single digits and teens for lows. A blend of the guidance was used, which was much colder than the NBM. If winds overperform, the forecast temperatures may be too cold. Most likely spots for the winds to stay up are the north shore of Long Island, New York City and close surrounds, and the remaining immediate shorelines. Areas with snow cover over CT and the Hudson Valley, along with the Pine Barrens of Long Island, will be the most likely spots to decouple.

LONG TERM /TUESDAY THROUGH SUNDAY/. Quiet for much of the period with the influence of high pressure until next weekend with a high moving farther northward and approaching low pressure from the south.

For Tuesday and going through Thursday, an air mass from the North Central US will be building into the region. Strong high pressure builds in gradually from the west Tuesday through Wednesday, moving overhead Wednesday night into Thursday. This will make for light and variable winds with the very weak pressure gradient. The high weakens Thursday night into Friday allowing for more clouds to move into the region as subsidence weakens.

Dry weather is expected through Friday. Next chances for precip arrive Friday night with increasing chances of precip for next weekend.

Next weekend, forecast has gusty E-NE flow and some potential heavy precip. Track of low center moves near region, either directly over the region or offshore. A lot of uncertainty with this event being a week away especially with the speed and position of the low center. Precip type will be highly dependent on track. Overall looking at the ECMWF, GFS, and Canadian models, the center of the low could track close enough to have some warming aloft. The retreating high going farther northward signals some cold air damming potential so with temperatures at 850mb getting potentially a few degrees C above freezing, could have a wintry mix Friday night into early Saturday changing to rain Saturday from south to north. Depending on how the low evolves next weekend, could have some wintry precip as well as Saturday night into Sunday. Have this as a rain and snow mix across the interior with a forecast of having the low move east of the area with colder air working into the area on the backside of the low.

Regarding temperatures, the air mass for Tuesday through Wednesday will be from the North Central states. Winds will be northerly but gradually decreasing as the center of the high moves in closer to the local area. The decrease of northerly winds will gradually lessen the cold air advection allowing for the air mass to moderate by midweek. Conveyed a gradual warmup for daytime highs each day Tuesday through Thursday going from several degrees below normal to several degrees above normal. There is more weight towards MOS for all temperatures Tuesday through Tuesday night as well as Wednesday night and Thursday night. The nighttime temperature use more MOS to convey radiational cooling conditions with more vast range of lows between NYC and rural sections.

AVIATION /12Z MONDAY THROUGH FRIDAY/. High pressure system gradually builds into central New York state through the forecast period.

VFR conditions expected to dominate the forecast with only few to scattered low level clouds which if any dissipate by the evening.

NW winds around 15ktg20-25kt are expected through this afternoon for NYC/NJ metro terminals. Gusts will likely be occasional for outlying terminals this morning, then becoming more frequent around 20 kt by mid to late morning. The wind direction should average right of 310 magnetic through the period. Winds and gusts subside for the evening push.

. NY Metro Enhanced Aviation Weather Support .

Detailed information, including hourly TAF wind component forecasts, can be found at: http://www.weather.gov/zny/n90

KJFK TAF Comments: no unscheduled amendments expected

The afternoon KJFK haze potential forecast is GREEN . which implies slant range visibility 7SM or greater outside of cloud.

KLGA TAF Comments: no unscheduled amendments expected

The afternoon KLGA haze potential forecast is GREEN . which implies slant range visibility 7SM or greater outside of cloud.

KEWR TAF Comments: no unscheduled amendments expected

The afternoon KEWR haze potential forecast is GREEN . which implies slant range visibility 7SM or greater outside of cloud.

KTEB TAF Comments: no unscheduled amendments expected

KHPN TAF Comments: no unscheduled amendments expected

KISP TAF Comments: no unscheduled amendments expected

OUTLOOK FOR 12Z TUESDAY THROUGH FRIDAY. Tuesday-Thursday. VFR. NW winds 5-10kts Friday. VFR NE winds 5-10kts

MARINE. Advisory level winds will gradually diminish today. The ocean will be the last place to fall below Small Craft Advisory levels tonight. Wavewatch was running a little low on the ocean so was adjusted up. Winds and seas then remain below advisory levels for the entire area until Friday, when swell from approaching low pressure could warrant an advisory on the ocean.

HYDROLOGY. There is potential for widespread precip next weekend. Still it is too soon to tell what exact hydrologic impacts there will be due to uncertainty with precip types and amounts.

EQUIPMENT. NYC NOAA Weather Radio Station KWO35 (162.55 MHz) is still operating at reduced power.

OKX WATCHES/WARNINGS/ADVISORIES. CT . None. NY . None. NJ . None. MARINE . Small Craft Advisory until 6 PM EST this evening for ANZ338- 355. Small Craft Advisory until 10 AM EST this morning for ANZ330- 335-340-345. Small Craft Advisory until 8 PM EST this evening for ANZ350- 353.

SYNOPSIS . NEAR TERM . PW SHORT TERM . LONG TERM . AVIATION . DJ/16 MARINE . HYDROLOGY . EQUIPMENT .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44022 - Execution Rocks 1 mi44 min NNW 16 G 23 22°F 32°F13°F
KPTN6 - 8516945 - Kings Point, NY 6 mi59 min 22°F 38°F1022.3 hPa
44040 - Western Long Island Sound 10 mi44 min N 16 G 21 22°F 1 ft11°F
BATN6 - 8518750 - The Battery, NY 19 mi59 min 21°F 42°F1021.9 hPa
ROBN4 - 8530973 - Robins Reef, NJ 23 mi59 min 22°F 1021.9 hPa
BGNN4 - 8519483 - Bergen Point West Reach, NJ 27 mi59 min 23°F 41°F1022.2 hPa
MHRN6 28 mi71 min NW 18 G 23
SDHN4 - 8531680 - Sandy Hook, NJ 32 mi59 min 22°F 41°F1022.3 hPa
44065 - Entrance to New York Harbor 36 mi39 min NNW 21 G 27 25°F 4 ft1022.2 hPa15°F
BRHC3 - 8467150 - Bridgeport, CT 36 mi59 min 19°F 39°F1020.6 hPa

Wind History for Kings Point, NY
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
New York, La Guardia Airport, NY10 mi38 minNNW 17 G 2310.00 miA Few Clouds21°F8°F57%1022.2 hPa
White Plains - Westchester County Airport, NY13 mi93 minNNW 17 G 2110.00 miFair18°F6°F59%1020.5 hPa
New York City, Central Park, NY14 mi38 minVar 6 G 1910.00 miFair20°F6°F55%1022.1 hPa
Teterboro, Teterboro Airport, NJ16 mi38 minN 10 G 1710.00 miFair21°F7°F54%1022.5 hPa
New York, Kennedy International Airport, NY16 mi38 minNNW 15 G 2410.00 miA Few Clouds21°F8°F57%1022.3 hPa
Farmingdale - Republic Airport, NY21 mi36 minN 10 G 1810.00 miA Few Clouds21°F7°F54%1021.6 hPa

Link to 5 minute data for KLGA

Wind History from LGA (wind in knots)
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1 day agoNE4E6E3S7S8SW17
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N13N10NW10NW11N7NW6NW7N6N5NW7N4

Tide / Current Tables for Execution Rocks, Long Island Sound, New York
   EDIT   Weekend mode (on/off)   (on/off)   Help   One Week of Data
Execution Rocks
Click for Map
Mon -- 01:48 AM EST     0.14 feet Low Tide
Mon -- 03:21 AM EST     Moonrise
Mon -- 07:15 AM EST     Sunrise
Mon -- 08:00 AM EST     7.55 feet High Tide
Mon -- 01:22 PM EST     Moonset
Mon -- 02:35 PM EST     -0.56 feet Low Tide
Mon -- 04:57 PM EST     Sunset
Mon -- 08:38 PM EST     6.65 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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10.40.212.95.16.67.37.57.15.43.41.70.6-0.3-0.40.834.85.96.56.65.63.8

Tide / Current Tables for Throg's Neck, Long Island Sound, New York Current
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Throg's Neck
Click for Map
Mon -- 01:29 AM EST     0.93 knots Max Flood
Mon -- 03:21 AM EST     Moonrise
Mon -- 04:47 AM EST     -0.00 knots Slack
Mon -- 07:15 AM EST     Sunrise
Mon -- 07:51 AM EST     -0.71 knots Max Ebb
Mon -- 11:18 AM EST     0.00 knots Slack
Mon -- 01:23 PM EST     Moonset
Mon -- 01:56 PM EST     0.98 knots Max Flood
Mon -- 04:57 PM EST     Sunset
Mon -- 05:30 PM EST     -0.00 knots Slack
Mon -- 08:21 PM EST     -0.69 knots Max Ebb
Mon -- 11:55 PM EST     0.00 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.40.90.90.50.2-0-0.3-0.6-0.7-0.5-0.2-0.10.20.710.70.30.1-0.1-0.5-0.7-0.6-0.4-0.2

Weather Map
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wmap_A
GEOS 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.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
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 numerous 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.