Sunday, August9, 2020
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Marine Weather and Tides
South Nyack, 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 5:58AMSunset 8:03PM Sunday August 9, 2020 4:32 PM EDT (20:32 UTC) Moonrise 11:14PMMoonset 11:40AM Illumination 67% Phase: Waning Gibbous; Moon at 21 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- 420 Pm Edt Sun Aug 9 2020
Tonight..SW winds 5 to 10 kt. Seas 1 ft or less. Slight chance of showers and tstms. Vsby less than 1 nm late.
Mon..SW winds 5 to 10 kt. Seas 1 ft or less.
Mon night..SW winds 5 to 10 kt. Seas 1 ft or less.
Tue..SW winds around 5 kt, becoming S in the afternoon. Seas 1 ft or less.
Tue night..SW winds 5 to 10 kt. Seas 1 ft or less.
Wed..S winds 5 to 10 kt. Seas 1 ft or less. Chance of showers and tstms in the afternoon.
Wed night..S winds around 5 kt. Seas 1 ft or less. Chance of showers and tstms in the evening.
Thu..N winds around 5 kt. Seas 1 ft or less. Chance of showers and tstms.
Thu night..SW winds around 5 kt. Seas 1 ft or less. Chance of showers and tstms.
Fri..SE winds 5 to 10 kt. Seas 1 ft or less. Chance of showers.
Fri night..E winds 5 to 10 kt. Seas 1 ft or less. Chance of showers. Winds and seas higher in and near tstms.
ANZ300 420 Pm Edt Sun Aug 9 2020
Synopsis for the long island waters and new york harbor.. A broad area of high pressure will remain over the region through Monday, then move out into the atlantic on Tuesday. A cold front will slowly approach on Wednesday, move into the area on Thursday, then pass south on Friday.


7 Day Forecast for Marine Location Near South Nyack, NY
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location: 41.08, -73.9     debug


Area Discussion for - New York City/Upton, NY
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FXUS61 KOKX 092017 AFDOKX

Area Forecast Discussion National Weather Service New York NY 417 PM EDT Sun Aug 9 2020

SYNOPSIS. A broad area of high pressure will remain over the region through Monday, then move out into the Atlantic on Tuesday. A cold front will slowly approach on Wednesday and move over the area on Thursday. The front will pass south and become stationary off the Mid Atlantic coast from Friday into the weekend as weak disturbances move along it.

NEAR TERM /UNTIL 6 AM MONDAY MORNING/. A few shwrs developed along the sea breeze and off terrain today. CIN however is expanding, leaving only a narrow interior corridor where initiation is possible. For the rest of this aftn and eve will therefore limit probabilities to portions of CT, the Lower Hudson valley, and NJ.

There is some subtle dropping of heights overnight. Both the NAM and GFS initiate some isold convection. No agreement with exact placement or timing in the models. Will include a minimal slight chance for the entire area, although it is very possible nothing happens.

Light winds tngt could allow for the development of some patchy fog and stratus, especially ern areas. Conditions otherwise would be mostly clear. The NBM was used for temps.

SHORT TERM /6 AM MONDAY MORNING THROUGH MONDAY NIGHT/. A thermal ridge builds into the area on Mon, resulting in an uptick in the heat. Many areas already hit the lower 90s on the heat idx scale on Sun, so a couple of degrees mores gets to 95 and abv. A heat advy was therefore issued for Mon-Wed (see Long Term on Tue/Wed specifics) for all but Suffolk County and sern coastal CT.

Some isold shwrs and tstms possible in the aftn mainly away from the coast where there appears to be too much CIN attm. The NAM suggest the Catskills may be the best triggering mechanism along with a weak mid lvl wave on nw flow aloft. This activity is modeled to hold together enough to support slight chance pops across much of the cwa Mon ngt.

The NBM with local adjustments was used for temps, with CONSALL used for dew points.

LONG TERM /TUESDAY THROUGH SUNDAY/. Hot and humid conditions will continue into Tue and Wed as high pressure moves out into the Atlantic. High temps outside of south facing shorelines and the higher elevations will reach the lower 90s, with dewpoints in the upper 60s and lower 70s. This yields max heat index values in the mid and upper 90s, and can't rule out expansion of the heat advy into NW Suffolk. Lows Tue and Wed night will be mainly in the lower/mid 70s, perhaps just a touch cooler across the far interior Wed night with upper 60s.

As the cold front approaches on Wed, sct tstms expected mainly from the NYC metro area north/west, with only slight chance PoP for SE coastal CT and Suffolk on Long Island. PW nears 2 inches and winds aloft should be weak, so storms that develop could be capable of producing heavy rainfall, also isolated pulse svr given steep low level lapse rates.

A better chance for tstms with heavy rainfall possible on Thu as as the front enters the area and as mid levels moisten up in its advance. Winds aloft look weak, so storms should once again be slow movers.

The front should sink to the south this weekend, but may still remain close enough for continued shower chances especially toward NYC and Long Island Fri/Sat, with increasing disagreement among the global models as the weekend progresses. ECMWF builds high pressure from eastern Canada down into the area on Sunday while a wave of low pressure passes to the south, which could result in dry/breezy conditions along the coast. GFS maintains more ridging off the coast and allows the front to remain closer or return northward more quickly, perhaps too quickly. Compromised between the two while leaning more toward the ECMWF.

AVIATION /20Z SUNDAY THROUGH FRIDAY/. High pressure over the terminals today shifts to the Western Atlantic tonight into Monday.

Mainly VFR through the forecast period. However, there is a chance for IFR or MVFR near the coast. The highest chance for seeing low conditions is at GON. Have left out of the TAF at ISP, JFK, and BDR for now as the stratus will likely stay to the east of these terminals.

S-SW flow this afternoon around 10 kt, slightly higher at JFK. A SE sea breeze is still possible at KEWR after 19z. Winds diminish tonight before becoming W-SW Monday morning under 10 kt. Sea breezes are likely late morning into the afternoon.

OUTLOOK FOR 18Z MONDAY THROUGH FRIDAY. Mon Afternoon-Tue. VFR. MVFR or lower stratus/fog possible for eastern terminals at night. Isolate shower or storm NW of NYC possible in afternoon. Wed-Fri. Increasing chance for afternoon/evening showers and thunderstorms with MVFR or lower possible.

MARINE. Winds and seas remain blw SCA criteria through the fcst period.

HYDROLOGY. Will continue to monitor potential for flooding with the approach of a cold front mid to late week. This threat appears to be isold in nature on Wed as PW increase to near 2 inches while mid/upper levels remain somewhat drier, then greater on Thu as PW rises above 2 inches and entire column moistens up. Slow moving storms could produce heavy rainfall in short order, but with wind fields aloft relatively weak any cell training would depend on mesoscale factors impossible to predict this far out in time.

OKX WATCHES/WARNINGS/ADVISORIES. CT . Heat Advisory from noon Monday to 8 PM EDT Wednesday for CTZ005>010. NY . Heat Advisory from noon Monday to 8 PM EDT Wednesday for NYZ067>075-176>179. NJ . Heat Advisory from noon Monday to 8 PM EDT Wednesday for NJZ002-004-006-103>108. MARINE . None.




Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44022 - Execution Rocks 16 mi48 min S 12 G 18 82°F 73°F
44040 - Western Long Island Sound 19 mi78 min SW 7.8 G 12 83°F 70°F
KPTN6 - 8516945 - Kings Point, NY 20 mi45 min SSW 18 G 19 80°F 1018.2 hPa
BATN6 - 8518750 - The Battery, NY 27 mi45 min 82°F 78°F1018.1 hPa
ROBN4 - 8530973 - Robins Reef, NJ 31 mi45 min S 17 G 18 78°F 1017.8 hPa
BGNN4 - 8519483 - Bergen Point West Reach, NJ 33 mi45 min 86°F 79°F1017.8 hPa
MHRN6 33 mi45 min SE 11 G 13
BRHC3 - 8467150 - Bridgeport, CT 39 mi45 min S 9.9 G 15 81°F 76°F1016.9 hPa
SDHN4 - 8531680 - Sandy Hook, NJ 43 mi45 min SSE 13 G 18 79°F 79°F1018.6 hPa

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 mi37 minS 910.00 miMostly Cloudy83°F69°F63%1017.1 hPa
Teterboro, Teterboro Airport, NJ17 mi42 minS 1010.00 miPartly Cloudy86°F70°F59%1016.8 hPa
New York, La Guardia Airport, NY21 mi42 minS 1310.00 miPartly Cloudy86°F69°F57%1017.5 hPa
New York City, Central Park, NY21 mi42 minSE 710.00 mi84°F70°F63%1017.6 hPa
Caldwell, Essex County Airport, NJ24 mi40 minVar 410.00 miA Few Clouds90°F64°F44%1018 hPa

Link to 5 minute data for KHPN

Wind History from HPN (wind in knots)
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Last 24hrSE8S7S5S5S3S3CalmCalmCalmCalmCalmCalmCalmCalmCalm3S4W53S63S5S11S9
1 day agoNE6NE5E5SE3NE4NE4NE4E4CalmN7NE4CalmE3N4CalmNE3CalmCalmCalmCalmSE5S7SW35
2 days agoSE3SE5CalmS3CalmCalmCalmCalmCalmCalmCalmCalmE4N3N4Calm4NE4E7E6E6SE8E7NE5

Tide / Current Tables for Tarrytown, Hudson River, New York (2)
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Tarrytown
Click for Map
Sun -- 02:37 AM EDT     3.18 feet High Tide
Sun -- 05:59 AM EDT     Sunrise
Sun -- 08:47 AM EDT     0.49 feet Low Tide
Sun -- 11:39 AM EDT     Moonset
Sun -- 03:06 PM EDT     3.16 feet High Tide
Sun -- 08:01 PM EDT     Sunset
Sun -- 09:17 PM EDT     0.91 feet Low Tide
Sun -- 11:13 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.52.93.13.22.92.21.40.90.60.50.81.52.22.733.232.61.91.31.10.911.4

Tide / Current Tables for Haverstraw (Hudson River), New York Current
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Haverstraw (Hudson River)
Click for Map
Sun -- 12:27 AM EDT     0.00 knots Slack
Sun -- 02:27 AM EDT     0.68 knots Max Flood
Sun -- 05:17 AM EDT     -0.00 knots Slack
Sun -- 05:59 AM EDT     Sunrise
Sun -- 08:58 AM EDT     -1.13 knots Max Ebb
Sun -- 11:40 AM EDT     Moonset
Sun -- 12:53 PM EDT     0.00 knots Slack
Sun -- 02:54 PM EDT     0.69 knots Max Flood
Sun -- 05:48 PM EDT     -0.00 knots Slack
Sun -- 08:02 PM EDT     Sunset
Sun -- 09:26 PM EDT     -1.03 knots Max Ebb
Sun -- 11:13 PM EDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-0.20.30.60.60.50.1-0.4-0.8-1-1.1-1-0.7-0.40.10.50.70.60.3-0.1-0.6-0.8-1-1-0.8

Weather Map
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wmap_A
GEOS Local Image of    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 (16,3,4,5)
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Ground Weather Radar Station Upton, NY
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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.