Sunday, April30, 2017 L-36.com


Marine Weather and Tides
Cold Spring, 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 5:51AMSunset 7:54PM Sunday April 30, 2017 10:42 AM EDT (14:42 UTC) Moonrise 9:41AMMoonset 12:00AM Illumination 21% Phase: Waxing Crescent; Moon at 5 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- 632 Am Edt Sun Apr 30 2017
Today..NE winds around 10 kt...becoming E this afternoon. Seas 1 ft or less.
Tonight..E winds 5 to 10 kt. Seas 1 ft or less. Patchy fog in the evening. Patchy fog after midnight. Vsby 1 to 3 nm... Decreasing to 1 nm or less after midnight.
Mon..E winds 5 to 10 kt...becoming se 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. Areas of drizzle and patchy fog in the morning with vsby 1 to 3 nm.
Mon night..S winds 10 to 15 kt...increasing to 15 to 20 kt after midnight. Gusts up to 25 kt. Seas 1 to 2 ft. Showers likely.
Tue..SW winds 10 to 15 kt with gusts up to 25 kt. Seas 1 to 2 ft. Chance of showers in the morning.
Tue night..SW winds 10 to 15 kt. Gusts up to 25 kt in the evening. Seas 1 to 2 ft.
Wed..W winds 10 to 15 kt...becoming nw 5 to 10 kt. Seas 1 to 2 ft...then 1 ft or less after midnight. Chance of rain after midnight.
Thu..NE winds around 5 kt...becoming se. Seas 1 ft or less. Chance of rain in the morning...then rain likely in the afternoon. Showers at night.
ANZ300 632 Am Edt Sun Apr 30 2017
Synopsis for long island waters and new york harbor.. High pressure builds down from southeastern canada today...then retreats to the northeast into Monday...allowing a warm front to lift to the north during the day on Monday. A cold front slowly crosses the tri-state Monday night and Tuesday morning...followed by high pressure building in through Wednesday night...then sliding offshore into Thursday. An area of low pressure approaches from the southwest on Thursday.

7 Day Forecast for Marine Location Near Cold Spring village, NY
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location: 41.4, -73.95     debug


Area Discussion for - New York City/Upton, NY
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Fxus61 kokx 301126
afdokx
area forecast discussion
national weather service new york ny
726 am edt Sun apr 30 2017

Synopsis
High pressure building into new england slowly moves east of the
area through tonight. A warm front moves northward through the
area tomorrow morning, followed by a cold front moving in from
the west Monday night and passing through the area by Tuesday
morning. High pressure builds in briefly for the middle of the
week. An area of low pressure will bring unsettled weather for
the end of the week into the weekend.

Near term /until 6 pm this evening/
Only minor updates needed to reflect current temperature and dew
point trends, as cooler air has been slower to advect southward
than previously forecast. Previous discussion follows.

A surface high will continue to build into new england beneath
confluence aloft between a departing trough and building high
pressure centered off the southeast coast. Onshore flow
gradually develops by afternoon, with a strengthening low-level
inversion and increasing cloud cover through the day. Despite
elevated instability, the strengthening subsidence inversion and
overall lack of forcing mechanism will limit any thunderstorm
chances. Highs will be much cooler than yesterday, even a few
degrees below climatological normals, follow this morning's cold
frontal passage and with the afternoon/evening onshore flow and
cloud cover.

Short term /6 pm this evening through 6 pm Monday/
Continued onshore flow will lead to low-level saturation, with
increasing chances for light drizzle through the evening and
into Monday night, particularly as warm advection strengthens
ahead of the returning/modified cold front. Low temperatures
will be closer to climatological normals. The warm front is
expected to move north of the area by morning/early afternoon
with brief clearing possible behind the front. Meanwhile, the
upper high off the southeast coast will gradually shift eastward
ahead of a closed upper low. At this time, there is no clear
signal for a pre- frontal trough, though there is a possibility
of a convectively induced vorticity maximum moving through the
area ahead of the main upper trough that may be sufficient
enough to produce isolated afternoon thunderstorms, primarily
north and west of the city. Afternoon highs largely depend on
how quickly the warm front moves through and how much clearing
can occur following its departure, though highs will likely be
much warmer than Sunday.

Long term /Monday night through Saturday/
The cold front moves through from west to east Monday night,
with rain and isolated thunderstorms clearing the area by
Tuesday morning. Low temperatures will be mild amidst cloud
cover and south flow, generally 5 to 10 degrees above
climatological normals. Flow becomes more westerly following the
frontal passage for Tuesday, and despite cold advection the
westerly component will be favorable for downslope warming which
may keep high temperatures a few degrees above guidance. Expect
above normal highs for Tuesday. By Wednesday, a subtle upper
trough and attendant cold front pass through the area by
afternoon/evening, with a reinforcement of cold advection and
temperatures closer to or slightly below normal. By late week,
upper difluence ahead of a developing system across the central
us will support moisture advection along the east coast and the
intensification of a surface low across the southeast that will
gradually traverse northeastward into the region, leading to a
period of unsettled weather into the weekend.

Aviation /12z Sunday through Thursday/
High pressure builds down from southeastern canada today. This
high retreats to the northeast tonight, as a warm front
approaches from the southwest.

Vfr through at least 20z, but will see 4000-5000 ft ceilings by
around midday. MVFR conditions develop by late afternoon/early
evening, ifr conditions are likely by late evening/around
midnight at all but kswf and kgon, where they should develop
after midnight. Airport minimums for ceiling and/or visibility could
possibly be reached late tonight/early Monday morning.

Winds continue to veer around to the E this morning, with
speeds generally around to just under 10 kt. Winds veer to the
e-ese this afternoon, with speeds mainly around 10kt, with some
13-14kt sustained speeds possible at city terminals. Occasional
gusts to 15-20kt are possible this afternoon. Winds become east
throughout this this evening, with speeds 10 kt or less, then
become light and variable overnight.

Outlook for 12z Monday through Thursday
Monday Ifr or lower likely through morning, with a chance
for improvement to MVFR orVFR in the afternoon.

Monday night Ifr or lower conditions, llws and scattered
thunderstorms are possible.

Tuesday-Wednesday night Vfr. Sw-wsw winds g15-20kt possible
Tuesday. W-nw winds g15-25kt possible Wednesday/Wednesday
night.

Thursday MVFR or lower conditions developing is possible.

Marine
A light to moderate pressure gradient over the waters through Monday
morning will limit winds to 15 kt or less. The pressure gradient
increases Monday afternoon, with winds up to 20 kt. Coastal ocean
waters could see some gusts up to 25 kt by Monday afternoon, with a
persistent onshore flow building seas to 5-6 ft over southern
portions of the coastal ocean zones on Monday as well.

The winds increase on Monday night, with solid small craft
conditions on the coastal ocean waters. As a result, have issued an
sca for the coastal ocean waters for Monday and Monday night. On the
non-ocean waters Monday night, gusts to small craft levels possible,
but given limited mixing, confidence is not high enough to warrant
headlines at this time.

From Tuesday into Tuesday night, all waters likely will experience
sca conditions with gusts of 25-30 kt.

The pressure gradient relaxes to light to moderate again by
Wednesday, and remains so through Thursday, limiting winds to 15 kt
or less. SCA level seas should linger on the coastal ocean waters
into Wednesday, then possibly return again by late Thursday ahead of
the next storm system.

Hydrology
No hydrologic impacts are expected through the forecast period.

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

Ny... None.

Nj... None.

Marine... Small craft advisory from 6 am Monday to 6 am edt Tuesday for
anz350-353-355.

Synopsis... Md
near term... Md
short term... Md
long term... Md
aviation... Maloit
marine... Maloit
hydrology... Md


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
KPTN6 - 8516945 - Kings Point, NY 42 mi43 min E 4.1 G 7 59°F 53°F1024.1 hPa (+0.9)
ANMN6 - Hudson River Reserve, NY 43 mi73 min 52°F 1024 hPa32°F
BRHC3 - 8467150 - Bridgeport, CT 44 mi43 min E 8 G 11 58°F 1023.9 hPa (+0.7)
BATN6 - 8518750 - The Battery, NY 48 mi43 min 60°F 53°F1023.5 hPa (+0.7)

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
Newburgh / Stewart, NY11 mi2 hrsENE 1020.00 miMostly Cloudy54°F39°F58%1025.1 hPa
Poughkeepsie, Dutchess County Airport, NY17 mi50 minN 010.00 miOvercast54°F34°F47%1023.7 hPa
Montgomery, Orange County Airport, NY18 mi49 minNNE 1010.00 miOvercast56°F36°F47%1023.6 hPa

Wind History from SWF (wind in knots)
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Last 24hrW12
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G29
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NW15NW15NW15NW15NW5NW10W12W8NW6E9E10E10E10NE10NE10NE10NE10
1 day agoW6W10W14W14W12W12--SW10
G16
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W8W7W7CalmCalmSW4CalmW6CalmCalmSW6W6CalmW6W10
2 days agoCalmCalmW66SE12SE8SE10SE10--SE10SE10SE10SE5SE4SE7CalmSE4CalmCalmCalmCalmCalmW7W6

Tide / Current Tables for West Point, Hudson River, New York
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West Point
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Sun -- 03:05 AM EDT     2.92 feet High Tide
Sun -- 05:54 AM EDT     Sunrise
Sun -- 09:41 AM EDT     Moonrise
Sun -- 10:04 AM EDT     -0.28 feet Low Tide
Sun -- 03:56 PM EDT     2.47 feet High Tide
Sun -- 07:52 PM EDT     Sunset
Sun -- 10:11 PM EDT     -0.00 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.52.32.82.92.82.41.710.4-0.1-0.3-00.61.422.32.52.31.81.20.60.200.2

Tide / Current Tables for Haverstraw (Hudson River), New York Current
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Haverstraw (Hudson River)
Click for Map
Sun -- 01:30 AM EDT     1.20 knots Max Flood
Sun -- 04:39 AM EDT     -0.00 knots Slack
Sun -- 05:54 AM EDT     Sunrise
Sun -- 08:12 AM EDT     -1.55 knots Max Ebb
Sun -- 09:41 AM EDT     Moonrise
Sun -- 12:00 PM EDT     0.00 knots Slack
Sun -- 02:03 PM EDT     0.87 knots Max Flood
Sun -- 04:56 PM EDT     -0.00 knots Slack
Sun -- 07:52 PM EDT     Sunset
Sun -- 08:28 PM EDT     -1.35 knots Max Ebb
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.71.11.20.90.4-0.2-0.9-1.3-1.5-1.4-1.1-0.6-00.60.90.80.5-0-0.6-1.1-1.3-1.3-1-0.6

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 (10,2,3,4)
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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.