Monday, December9, 2019
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Marine Weather and Tides
South Nyack, NY

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 7:06AMSunset 4:28PM Monday December 9, 2019 4:24 PM EST (21:24 UTC) Moonrise 4:05PMMoonset 5:14AM Illumination 96% Phase: Waxing Gibbous; Moon at 13 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- 1259 Pm Est Mon Dec 9 2019
.small craft advisory in effect through late tonight...
This afternoon..S winds 15 to 20 kt with gusts up to 25 kt. Seas around 2 ft. Rain and drizzle early, then rain late. Patchy fog. Vsby 1 to 3 nm.
Tonight..SW winds 15 to 20 kt, diminishing to 10 to 15 kt after midnight. Gusts up to 25 kt. Seas around 2 ft. Rain, mainly in the evening. Patchy fog. Vsby 1 to 3 nm.
Tue..SW winds 10 to 15 kt. Seas 1 to 2 ft. Chance of showers in the morning, then rain in the afternoon.
Tue night..NW winds around 10 kt. Seas around 1 ft. Rain in the evening, then rain and snow after midnight with vsby 1 to 3 nm.
Wed..NW winds around 10 kt, becoming W in the afternoon. Seas around 1 ft. Snow likely in the morning. Vsby 1 to 3 nm.
Wed night..NW winds 10 to 15 kt with gusts up to 20 kt. Seas 1 to 2 ft.
Thu..N winds 10 to 15 kt. Seas 1 to 2 ft.
Thu night..NE winds around 10 kt. Seas around 1 ft.
Fri..E winds 10 to 15 kt. Seas around 2 ft.
Fri night..E winds 10 to 15 kt. Seas 1 to 2 ft.
ANZ300 1259 Pm Est Mon Dec 9 2019
Synopsis for the long island waters and new york harbor.. A warm front will lift to the north of all area waters by tonight. A cold front will then approach on Tuesday and slowly move across from Tuesday night into Wednesday. Arctic high pressure will then follow later in the week before another potential storm system arrives next weekend.


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 092103 AFDOKX

Area Forecast Discussion National Weather Service New York NY 403 PM EST Mon Dec 9 2019

SYNOPSIS. A cold front will approach tonight into Tuesday and will move across late Tuesday into Tuesday night. Weak low pressure develops along the front offshore slowing down its eastward progress Wednesday. Another low pressure trough approaches Wednesday before strong arctic high pressure builds into the region Wednesday night through Thursday. The high moves off the northeast coast Thursday night. A low pressure system approaches from the southwest Friday and moves through the area Saturday and Saturday night. High pressure builds Sunday and Monday.

NEAR TERM /UNTIL 6 AM TUESDAY MORNING/. The warm front that was north of the area will become weak and eventually dissipate. The region is in a larger warm sector of a low pressure system of which the parent low will be moving into Southeast Canada. The associated cold front will be approaching the region through tonight.

Aloft, the mid levels show nearly a steady height tendency with a strong shortwave pivoting into the Great Lakes.

Rain continues this evening before becoming more intermittent and lightening overnight into Tuesday morning. This evening, the rain could bring down some higher winds, but keeping gusts below 35 mph for the most part as inversion aloft limits mixing. Without any surface instability and elevated instability as diagnosed from forecast Showalter Indices showing slightly positive values, removed thunder from forecast. Rain this evening will be the relatively more intense timeframe, moderate to possibly heavy at times. The heavy rain could bring down a brief wind gust up to around 40 mph.

Temperatures will not drop too much tonight, making for minimal diurnal temperature trends. Forecast lows are from the mid 40s to lower 50s using a consensus of model guidance.

SHORT TERM /6 AM TUESDAY MORNING THROUGH WEDNESDAY/. The short term will feature the rainfall ahead of and along the cold front Tuesday into Tuesday evening as well as the mixing with and changing to snow behind the cold front later Tuesday night into Wednesday.

For this timeframe, used mostly a consensus of raw model temperatures with some slight adjustments downward for Tuesday night and Wednesday when colder air will be advecting into the region on more of a northwest flow.

In the upper levels, a jet streak will be approaching and will move in with its right rear quad by Wednesday morning, before moving farther northeast. Mid level shortwave trough will be approaching Tuesday and then move across the region Tuesday night into Wednesday with the most positive vorticity advection staying north of the region. The most forcing for lift will be late Tuesday night into Wednesday.

At the surface, the cold front approaches Tuesday and moves across late Tuesday afternoon into Tuesday evening. Rain continues through the day which could again be moderate at times. Precipitation lingers behind the cold front for Tuesday night into Wednesday and models have been pretty consistent showing potential for 1 to 3 inches of snow for much of the area, 3 to 4 inches across the interior, which is reflected in the current forecast. Initially, the changeover from rain to snow will be limited with accumulation especially if it is light as ground temperatures will be above freezing. The snow accumulation occurs Wednesday morning when much of the region is at freezing or below. Some slight rise in temperatures expected during the day, low to mid 30s.

While the amounts of snow forecast are 1 to 4 inches, the timing puts this during the Wednesday morning commute, making for potentially hazardous travel conditions due to slippery surfaces and reduced visibilities.

Weather becomes drier Wednesday afternoon into Wednesday evening with a slow decrease in clouds as the shortwave trough starts to lift north of the region.

LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/. Wednesday night through Thursday night the guidance is in good agreement with arctic high pressure building over the region and then departing off the northeast coast. Well below normal temperatures are expected Wednesday night and Thursday. The upper flow becomes nearly zonal through Thursday night. Differences then develop with the next shortwaves impacting the area Friday into Saturday night. Split flow is expected to develop and the timing, and strength, of the northern and southern stream shortwaves differs. Regardless, the southern stream wave remains dominant, with warm advection increasing ahead of a developing warm front. The best chances at this time for snow and/or a rain snow mix will be across the interior Friday morning. Then timing of the warm up will determine the changeover to rain. Along the coast rain is expected. A lot of uncertainty remains with the strength of the northern stream shortwave and the interaction with the southern stream wave later Saturday into Sunday. The GFS is much farther to the north and deeper than the ECMWF with the northern stream.

High pressure and colder weather returns Sunday into Monday.

AVIATION /20Z MONDAY THROUGH SATURDAY/. A cold front over the Midwest will slowly approach the area through 18Z Tuesday.

Mainly IFR or lower through the TAF period. A few breaks to MVFR are possible through around 22Z. Rain continues to overspread the region through this evening. Conditions transition into spotty drizzle or light rain overnight into Tuesday, with another band of rain possible closer to the frontal boundary after 15Z.

There could be significant variations in visibility, especially through tonight. Fog and drizzle could result 1/2SM or less overnight, but it was too uncertain to include in the TAFs based on the strength of the expected winds.

Winds will increase to 15-25 kt with gusts up to 35 kt through at least 02Z. The potential exists for the strongest winds to remain east of the NYC airports, and the most recent amendments have slowed the onset of these stronger winds. Winds veer to the southwest with speeds slightly lighter on Tuesday.

LLWS at all terminals through tonight.

OUTLOOK FOR 18Z TUESDAY THROUGH SATURDAY. Rest of Tuesday. Winds shift to the northwest behind the cold front. Rain transitions to snow from northwest to southeast. Wednesday. IFR or lower possible in snow, especially in the morning. Winds generally below 10 kt with direction variable at times. Thursday. VFR Friday. VFR becoming IFR overnight with rain or a wintry mix developing. LLWS possible late. Saturday. IFR with rain. LLWS possible.

MARINE. Gale warning in effect for all ocean zones through tonight. SCA remains in effect for non-ocean waters through tonight. For Tuesday, SCA conditions remain on the ocean and continue through Tuesday night. SCA remains on much of the ocean Wednesday before dropping below SCA mid to late Wednesday afternoon west of Moriches Inlet.

SCA in effect for all waters. Main push of stronger winds to the east today, and gusts in S-SW flow getting close but not quite to 35 kt except on the ocean E of Moriches Inlet this afternoon. Gale warning starts on the ocean east of Moriches Inlet this afternoon. Rest of ocean, gale warning starts tonight. Gales remain on ocean until Tuesday morning and SCA remains on non-ocean waters until Tuesday morning. Gales subside Tuesday with SCA remaining on the ocean. Tuesday expected to be below SCA on non-ocean waters.

Increasing, and gusty, northwest flow develops Wednesday night behind departing low pressure. Marginal SCA conditions are expected to develop on the ocean waters Wednesday night and continue into Thursday morning.

With high pressure moving across the waters Thursday and departing Friday sub advisory conditions are expected. Then east to southeast winds will increase ahead of the next low pressure system moving in from the southwest Friday night. Once again, marginal SCA wind gusts are expected on the ocean waters Friday night through most of Saturday, while ocean seas will build significantly Friday night into Saturday.

HYDROLOGY. Long duration rainfall event continues through Tuesday evening before it becomes more snowfall late Tuesday night into Wednesday. Total liquid equivalent remaining is between 1 to 2 inches.

Nuisance/poor drainage flooding may occur tonight when the heaviest rain falls but otherwise no other flooding is expected.

The next significant rain of up to an inch is expected Friday night through Saturday. Timing and rainfall amounts may change, so hydrologic impacts are uncertain at this time.

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 AM EST Tuesday for ANZ330-335-338- 340-345. Gale Warning until 6 AM EST Tuesday for ANZ350-353-355.

SYNOPSIS . JM/MET NEAR TERM . JM SHORT TERM . JM LONG TERM . MET AVIATION . MARINE . JM/MET HYDROLOGY . JM/MET EQUIPMENT .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
44022 - Execution Rocks 16 mi39 min S 5.8 G 7.8 49°F 32°F49°F
44040 - Western Long Island Sound 19 mi39 min SSW 5.8 G 7.8 48°F 47°F
KPTN6 - 8516945 - Kings Point, NY 20 mi54 min SW 7 G 8.9 52°F 44°F1013.5 hPa
BATN6 - 8518750 - The Battery, NY 27 mi54 min 51°F 46°F1012.8 hPa
ROBN4 - 8530973 - Robins Reef, NJ 31 mi54 min S 7 G 8.9 52°F 1012.3 hPa
BGNN4 - 8519483 - Bergen Point West Reach, NJ 33 mi54 min 51°F 45°F1012.1 hPa
MHRN6 33 mi54 min SSE 4.1 G 7
BRHC3 - 8467150 - Bridgeport, CT 39 mi60 min SW 7 G 12 53°F 44°F1012.7 hPa
SDHN4 - 8531680 - Sandy Hook, NJ 43 mi54 min E 4.1 G 5.1 50°F 42°F1013.2 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 mi88 minSW 52.50 miLight Rain52°F0°F%1013.4 hPa
Teterboro, Teterboro Airport, NJ17 mi33 minSSE 10 G 202.50 miLight Rain Fog/Mist52°F51°F97%1011.3 hPa
New York, La Guardia Airport, NY21 mi33 minS 63.00 miRain Fog/Mist54°F50°F87%1011.9 hPa
New York City, Central Park, NY21 mi33 minVar 32.50 miRain Fog/Mist52°F50°F93%1011.7 hPa
Caldwell, Essex County Airport, NJ24 mi31 minW 35.00 miLight Rain Fog/Mist51°F48°F89%1012.7 hPa

Link to 5 minute data for KHPN

Wind History from HPN (wind in knots)
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Last 24hrS7S3CalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmCalmE4E3E7E5S86S5SW6SW5S8
1 day agoW4NW10NW5NW6NW8NW3NW4NE5NE3--NW3CalmCalmCalmCalmCalmSE3S65S8S8S10
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Tide / Current Tables for Tarrytown, Hudson River, New York (2)
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Tarrytown
Click for Map
Mon -- 01:43 AM EST     0.11 feet Low Tide
Mon -- 04:13 AM EST     Moonset
Mon -- 07:08 AM EST     Sunrise
Mon -- 07:51 AM EST     3.31 feet High Tide
Mon -- 02:25 PM EST     0.15 feet Low Tide
Mon -- 03:04 PM EST     Moonrise
Mon -- 04:26 PM EST     Sunset
Mon -- 08:16 PM EST     2.92 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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0.60.20.10.61.42.22.83.23.33.12.51.71.10.60.20.30.81.62.22.72.92.82.31.6

Tide / Current Tables for Haverstraw (Hudson River), New York Current
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Haverstraw (Hudson River)
Click for Map
Mon -- 01:39 AM EST     -1.18 knots Max Ebb
Mon -- 04:14 AM EST     Moonset
Mon -- 05:20 AM EST     0.00 knots Slack
Mon -- 07:09 AM EST     Sunrise
Mon -- 07:38 AM EST     0.88 knots Max Flood
Mon -- 10:39 AM EST     -0.00 knots Slack
Mon -- 02:14 PM EST     -1.27 knots Max Ebb
Mon -- 03:04 PM EST     Moonrise
Mon -- 04:26 PM EST     Sunset
Mon -- 06:05 PM EST     0.00 knots Slack
Mon -- 08:04 PM EST     0.67 knots Max Flood
Mon -- 10:46 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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-0.9-1.1-1.2-1-0.6-0.20.40.80.90.70.4-0.2-0.7-1.1-1.3-1.2-1-0.6-0.10.50.70.60.4-0.1

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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