Monday, July24, 2017 L-36.com


Marine Weather and Tides
Niantic, CT

Version 3.4
What's New / NOTES
6/25/2017 - NOAA is having a major issue that impact the 7 day forecast load times. Many users are reporting problems. The issue has been reported.
5/23/2017 - Worked with NOAA again to speed up the 7 day forecast load times. Thanks to them for being responsive.
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.

Sunrise 5:35AMSunset 8:14PM Monday July 24, 2017 4:51 PM EDT (20:51 UTC) Moonrise 6:58AMMoonset 9:12PM Illumination 2% Phase: Waxing Crescent; Moon at 1 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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ANZ330 Long Island Sound East Of New Haven Ct/port Jefferson Ny- 420 Pm Edt Mon Jul 24 2017
.small craft advisory in effect until 6 pm edt this evening...
Tonight..NE winds 10 to 15 kt. Gusts up to 25 kt early. Seas 2 to 4 ft. Slight chance of showers early this evening. Chance of showers after midnight, then slight chance of showers late.
Tue..NE winds 10 to 15 kt. Seas 2 to 3 ft.
Tue night..NE winds 5 to 10 kt. Seas around 2 ft.
Wed..NE winds 5 to 10 kt, becoming se in the afternoon. Seas 1 ft or less.
Wed night..S winds 5 to 10 kt. Seas 1 ft or less.
Thu..SW winds 5 to 10 kt, increasing to 10 to 15 kt in the afternoon. Seas 1 ft or less.
Thu night..SW winds 10 to 15 kt, diminishing to 5 to 10 kt after midnight. Seas 1 ft or less. Chance of showers in the evening, then showers likely after midnight.
Fri..SW winds 5 to 10 kt, becoming N after midnight. Seas 1 ft or less. Chance of showers.
Sat..NE winds 5 to 10 kt. Seas 1 ft or less.
ANZ300 420 Pm Edt Mon Jul 24 2017
Synopsis for the long island waters and new york harbor.. Another low passes south of the area tonight into Tuesday. High pressure builds over the area Wednesday before moving offshore Wednesday night ahead of a cold front to the west. The cold front will slowly approach the area through late week before passing to the east on Friday. Brief high pressure builds across the area again for Saturday.

7 Day Forecast for Marine Location Near Niantic, CT
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location: 41.23, -72.24     debug


Area Discussion for - New York City/Upton, NY
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Fxus61 kokx 242037
afdokx
area forecast discussion
national weather service new york ny
437 pm edt Mon jul 24 2017

Synopsis
High pressure builds north of the area this evening, while
another frontal wave passes just south of long island late
tonight into Tuesday. High pressure then builds into the area
Tuesday night into Wednesday before moving offshore Wednesday
night ahead of a cold front to the west. The cold front will
slowly approach the area through late week before passing to the
east on Friday. Brief high pressure builds across the area
again before a surface low passes to the south early next week.

Near term until 6 am Tuesday morning
Conditions have dried out across the area as low pressure
passes to the south and east of southern new england early this
evening. In its wake, high pressure builds across new england
with northerly winds. In fact, the north winds have drawn
anomalously cool air into the region with most locations in the
upper 50s to lower 60s, the exception being the western third of
the area where some thinning of the overcast has allowed
temperatures to rise to around 70.

The airmass across the region remains stable with the N NE flow.

Convection firing up across eastern pa this afternoon is
unlikely to make it this far east, but nevertheless is
something that needs be watched if the cloud cover across
western section erodes and allow airmass to destabilize
further.

An approaching upper trough over the great lakes tonight aids
the development of a frontal wave near the DELMARVA that passes
just south of li. Based on latest guidance, it appears the low
will pass far enough south to spare the region anything more
than showers, with the best chance for measurable rain across
li.

Overnight lows will range from the mid 50s inland, to the lower
60s at the coast. This about 5 to 10 degrees below normal.

There remains a high risk of rip currents at ocean beaches
through Tuesday.

Short term 6 am Tuesday morning through Tuesday night
Low pressure passes to the south and east in the morning with
lingering showers possible into the afternoon as the upper
trough moves across the area. A continued N NE flow will result
in mostly cloudy conditions with temperatures in the 60s to
lower 70s. This is well below normal by about 10-15 degrees.

There could be some late day clearing with subsidence on the
backside of the upper trough and high pressure building in from
the west. High temperatures could be warmer than forecast
across wester sections if this clearing happens earlier in the
day.

Another unseasonably cool night is on tap for Tuesday night with
continued clearing.

There remains a high risk of rip currents at ocean beaches
through Tuesday.

Long term Wednesday through Monday
Initially zonal flow will give way to a blocking pattern as high
pressure builds across the western us and the western atlantic,
placing the northeast in an unsettled pattern dominated by multiple
low pressure systems. Wednesday will be one of the quieter days in
the extended as high pressure builds across the area, eventually
moving offshore overnight. Given the prolonged period of
northeasterly flow, there is a low chance of some morning clouds and
drizzle, although lower dew points suggest anything ongoing will
likely dissipate quickly. Temperatures will be a few degrees below
normal. By Thursday, the area returns to a more southerly flow ahead
of a slow moving cold front, with a chance of afternoon showers and
thunderstorms, especially to the north and west of the nyc metro.

High temperatures will still be a few degrees cooler than
climatological normals, though there will be a marked increase in
humidity amidst moist advection which in turn will lead to low
temperatures closer to normal. By Thursday night into Friday, the
front will slowly move through the area bringing the greatest
possibility of showers and thunderstorms to the area before drying
out as high pressure builds eastward on Saturday into early next
week. There is a little bit more uncertainty towards the weekend
depending on the placement of a coastal low, which is currently
forecast to pass well to the south but subsequent forecasts will
need to be monitored.

Aviation 21z Monday through Saturday
A frontal boundary will remain south of the area through Tuesday.

The rain is mostly over. There however will be another chance of
showers this evening into late at night, but should mostly pass
south of the terminals.

Otherwise mainly MVFR conditions are expected. MVFR this evening
will prevail before lowering to ifr heading into daybreak Tuesday
after which conditions are expected to return to MVFR by late
morning.

Ne winds near 10-15 kt gusting 20-25 kt are backing to a more
northerly flow but will return to a NE flow tonight and closer to
10 kt for sustained winds.

Ny metro enhanced aviation weather support...

detailed information, including hourly TAF wind component fcsts,
can be found at http:

Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LDLC3 - New London Ledge CT - Ledge Light Weather 10 mi37 min NNE 21 G 25 61°F 1009 hPa56°F
NLNC3 - 8461490 - New London, CT 12 mi52 min NNE 5.1 G 12 61°F 69°F1009.7 hPa (-0.0)
NWHC3 - 8465705 - New Haven, CT 36 mi52 min NNE 17 G 25 63°F 75°F1010.8 hPa (+1.2)
44017 - 23 Nautical Miles Southwest of Montauk Point, NY 38 mi62 min 67°F 74°F6 ft1007.5 hPa (-0.0)67°F

Wind History for New London, CT
(wind in knots)    EDIT      (on/off)   Help
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Groton / New London, Groton / New London Airport, CT12 mi56 minNNE 17 G 2410.00 miOvercast61°F57°F87%1009.5 hPa
Chester, Chester Airport, CT18 mi57 minNNE 8 G 1510.00 miOvercast61°F59°F94%1010.8 hPa
Montauk, Montauk Airport, NY20 mi58 minNNE 13 G 18 mi61°F60°F97%1009.6 hPa

Wind History from GON (wind in knots)
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Last 24hrE11E11E12E9E10E10E8E9E10E11E11E10E11E13E8NE12NE9NE12E11NE11
G15
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G24
1 day agoCalmS3SE4CalmNE3CalmCalmCalmN5N4N4N4N5NE4N7NE7NE11NE11NE10E11E9E9E9SE10
2 days agoW10W7W6SW4S3CalmSW6W4SW3CalmN4N3N5CalmCalmN7N5N5S7SW6SW5S6SE4S3

Tide / Current Tables for Plum Gut Harbor, Plum Island, Long Island, New York
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Plum Gut Harbor
Click for Map
Mon -- 05:10 AM EDT     -0.41 feet Low Tide
Mon -- 05:37 AM EDT     Sunrise
Mon -- 06:57 AM EDT     Moonrise
Mon -- 11:03 AM EDT     3.08 feet High Tide
Mon -- 05:21 PM EDT     -0.09 feet Low Tide
Mon -- 08:13 PM EDT     Sunset
Mon -- 09:11 PM EDT     Moonset
Mon -- 11:28 PM EDT     3.57 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
3.32.61.80.90.1-0.4-0.20.51.52.32.93.12.92.41.81.10.4-0.100.71.62.53.23.5

Tide / Current Tables for The Race, Long Island Sound, New York Current
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The Race
Click for Map
Mon -- 12:25 AM EDT     -0.00 knots Slack
Mon -- 03:31 AM EDT     -4.23 knots Max Ebb
Mon -- 05:36 AM EDT     Sunrise
Mon -- 06:51 AM EDT     0.00 knots Slack
Mon -- 06:57 AM EDT     Moonrise
Mon -- 09:42 AM EDT     3.59 knots Max Flood
Mon -- 12:59 PM EDT     -0.00 knots Slack
Mon -- 03:56 PM EDT     -3.74 knots Max Ebb
Mon -- 07:05 PM EDT     0.00 knots Slack
Mon -- 08:12 PM EDT     Sunset
Mon -- 09:10 PM EDT     Moonset
Mon -- 09:59 PM EDT     3.60 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.8-1.1-3-4.1-4.1-3.2-1.60.32.23.43.62.91.7-0-1.9-3.3-3.7-3.2-1.9-0.21.73.13.63.2

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 (16,3,4,5)
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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.