Saturday, April21, 2018 L-36.com


Marine Weather and Tides
Portland, CT

Version 3.4
What's New / NOTES
3/3/2018 - There is a new GOES Satellite for the east coast that required rewriting that part of the code. Please report any issues.
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.

Sunrise 5:58AMSunset 7:39PM Saturday April 21, 2018 3:18 AM EDT (07:18 UTC) Moonrise 10:37AMMoonset 12:46AM Illumination 34% Phase: Waxing Crescent; Moon at 6 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- 948 Pm Edt Fri Apr 20 2018
Tonight..NW winds 15 to 20 kt with occasional gusts up to 25 kt, diminishing to around 10 kt after midnight. Seas 1 ft or less.
Sat..NW winds 5 to 10 kt, becoming W in the afternoon. Seas 1 ft or less.
Sat night..N winds 5 to 10 kt. Seas 1 ft or less.
Sun..NW winds 5 to 10 kt, becoming W in the afternoon. Seas 1 ft or less.
Sun night..W winds 5 to 10 kt, becoming nw after midnight. Seas 1 ft or less.
Mon..N winds around 5 kt, becoming S in the afternoon. Seas 1 ft or less.
Mon night..S winds 5 to 10 kt, becoming sw after midnight. Seas 1 ft or less.
Tue..S winds around 5 kt, increasing to 5 to 10 kt in the afternoon. Seas 1 ft or less.
Tue night..SE winds 5 to 10 kt. Seas 1 ft or less. Chance of rain after midnight.
Wed..E winds 10 to 15 kt. Seas around 2 ft. Rain likely.
Wed night..E winds 10 to 15 kt, becoming ne 5 to 10 kt after midnight. Seas around 2 ft in the evening, then 1 ft or less. Rain likely, mainly in the evening.
ANZ300 948 Pm Edt Fri Apr 20 2018
Synopsis for the long island waters and new york harbor.. High pressure builds in from the west through tonight and remains over the waters through Monday. A coastal low approaches from the southeastern seaboard Tuesday, and moves through Wednesday, and to the northeast of the area Thursday.

7 Day Forecast for Marine Location Near Portland, CT
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location: 41.56, -72.63     debug


Area Discussion for - New York City/Upton, NY
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Fxus61 kokx 210555
afdokx
area forecast discussion
national weather service new york ny
155 am edt Sat apr 21 2018

Synopsis
High pressure builds in from the west through tonight, then
remains over the region into Monday. A coastal low will likely
affect the region the middle of next week.

Near term until 6 am this morning
Forecast is on track with only minor changes made.

An upper longwave trough along the eastern canadian coast and
extending into the northeast remains through tonight with a
northwest cyclonic flow. Meanwhile surface low pressure along
the canadian coast tracks northeast as high pressure builds to
the west. The atmosphere will remain dry and cloud-free tonight.

Winds will be diminishing, and likely decouple late tonight.

This will allow for good radiational cooling with clear
conditions. Inland areas will likely see patchy to areas of
frost and included in the weather forecast. However, the spring
frost freeze program has not begun across these areas.

Short term 6 am this morning through 6 pm Sunday
The upper trough remains across the northeast through Saturday
night as the center of the surface high builds into the
northeast. The weather will remain quiet and cloud free.

Cyclonic flow and weak cold advection continue through Saturday
night, however, the airmass will be modifying under full sun,
and highs Saturday will be approaching normal levels. Saturday
night will be cloud-free with light winds and again there will
be ideal radiational cool conditions. So, expect areas and
patchy frost inland.

Long term Sunday night through Friday
Upper air pattern will very much resemble early springtime
as an upper low over the mississippi valley slowly works east
on the heels of a departing northern branch trough over the
northeast. Ridging both aloft and at the surface builds across
the region to start the week but then gives way to the
aforementioned southern branch close low. The system will lift
northward in response to a northern branch shortwave trough
moving into the upper midwest and great lakes, sending surface
low pressure up the eastern seaboard Tuesday into Wednesday.

Overrunning rains are forecast to develop across the area
Tuesday night and continue into Wednesday night. There are
some differences thereafter though with the global models as
the ecwmf is more progressive with this system and dries things
out for the end of week, while the GFS and ggem close off the
northern branch trough with unsettled conditions lingering until
a cold frontal passage Friday night. Thus, will maintain a
low chance of showers for the end of the week. The point to be
made here there is clearly uncertainty in the guidance for the
end of the week as northern branch shortwave energy dives
southeast across the upper midwest and great lakes region.

However, all the global models are pointing to amplification of
the ridge out west and the trough reestablishing itself across
the east by next weekend.

As for temperatures, much of the period will feature seasonable
temperatures with the exception of Wednesday, where onshore
flow will keep highs several degrees below normal.

Aviation 06z Saturday through Wednesday
High pressure will build in through the TAF period.VFR
conditions are expected. Winds will be near 10 kt or less
through much of the TAF period mainly from W to NW direction.

The winds will initially be NW going into early Saturday and
then back to a more westerly direction during the afternoon with
some SW flow as a sea breeze for some terminals. Also for this
afternoon into early evening, there will be some wind gusts to
15-20 kt. The timing and duration of any sea breezes is
uncertain with wind direction possibly varying about 20-40
degrees comparing observed to forecast for Saturday afternoon.

The timing of the SW flow could also be 2-3 hours off from
forecast.

Outlook for 06z Sunday through Wednesday
Saturday night through Tuesday Vfr.

Tuesday night through Wednesday MVFR or lower conditions
increasingly likely with rain.

Marine
High pressure continues to build into the waters from the west
with the pressure gradient force gradually weakening. Seas on
the ocean waters have subsided to below SCA levels. Also, winds
and gusts were generally below SCA levels, especially across
the open ocean waters. However, through early this evening
occasional nearshore gusts may reach 25 kt. With frequent gusts
and seas below SCA levels the SCA was cancelled.

High pressure will be across the forecast waters Saturday and
Saturday night with winds and seas remaining below SCA levels.

Tranquil conditions are forecast Sunday through Tuesday as high
pressure builds across the waters. However, low pressure moving up
the eastern seaboard Tuesday into Wednesday will result in
increasing winds and building seas with SCA conditions likely to
return by Wednesday morning.

Hydrology
Dry conditions are expected through early next week.

A widespread rainfall is expected for the middle of next week
with the possibility moderate to heavy rain. Predictability is
low on rainfall amounts and hydrologic impacts at this time.

Equipment
Nyc NOAA weather radio station kwo-35 (162.55 mhz) remains off
the air.

Okx watches warnings advisories
Ct... None.

Ny... None.

Nj... None.

Marine... None.

Synopsis... Met dw
near term... Jp met
short term... Met
long term... Dw
aviation... Jm
marine... Met dw
hydrology... Met dw
equipment...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NWHC3 - 8465705 - New Haven, CT 24 mi48 min NNE 1 G 4.1 39°F 45°F1027.5 hPa
44039 - Central Long Island Sound 29 mi33 min NW 14 G 16 41°F 1 ft
NLNC3 - 8461490 - New London, CT 32 mi48 min NNW 1.9 G 4.1 38°F 43°F1026 hPa
LDLC3 - New London Ledge CT - Ledge Light Weather 34 mi38 min NW 8.9 G 9.9 39°F 26°F
BRHC3 - 8467150 - Bridgeport, CT 40 mi54 min NNW 1.9 G 4.1 38°F 42°F1027.1 hPa

Wind History for New Haven, CT
(wind in knots)    EDIT      (on/off)   Help
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Last
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NW7
G12
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G10
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G25
N23
G28
NW21
G28
N12
G23
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E2
N5
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NE1
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G8
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G7
N1
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NW10
G14
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G22
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G16
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G13
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NW9
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G13
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G18
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SW10
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G15
NW6
G9
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W1
S1
--
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E1

Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Meriden, Meriden Markham Municipal Airport, CT11 mi25 minSSE 310.00 miFair32°F25°F75%1027 hPa
Hartford, Hartford-Brainard Airport, CT12 mi25 minN 010.00 miFair35°F28°F76%1027 hPa
Chester, Chester Airport, CT14 mi23 minNW 710.00 miFair36°F24°F65%1026.4 hPa
New Haven, Tweed-New Haven Airport, CT23 mi25 minNNW 410.00 miFair39°F25°F57%1027.2 hPa

Wind History from MMK (wind in knots)
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Last 24hrNW8NW9NW7NW5NW9NW13
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NW12NW8NW8NW4S3
1 day agoCalmN3CalmS3CalmN6N6CalmN4NW7CalmNW4W7NW7NW10NW10NW9NW12
G21
NW12
G18
NW9NW10NW7
G20
NW8NW11
2 days agoW6CalmSW4S5SW7SW9
G17
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G14
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G26
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NW10W10W7W5W4W5W4CalmCalmCalmCalmNW3

Tide / Current Tables for Portland, Connecticut
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Portland
Click for Map
Sat -- 12:30 AM EDT     0.31 feet Low Tide
Sat -- 12:46 AM EDT     Moonset
Sat -- 05:45 AM EDT     2.75 feet High Tide
Sat -- 06:01 AM EDT     Sunrise
Sat -- 10:37 AM EDT     Moonrise
Sat -- 01:25 PM EDT     0.00 feet Low Tide
Sat -- 06:33 PM EDT     2.10 feet High Tide
Sat -- 07:37 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.40.81.62.22.62.72.52.11.61.10.70.300.10.61.31.82.12.11.91.51.20.9

Tide / Current Tables for Higganum Creek, Connecticut River, Connecticut
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Higganum Creek
Click for MapNote: Tidal information only applies during low river stages.

Sat -- 12:45 AM EDT     Moonset
Sat -- 05:04 AM EDT     2.89 feet High Tide
Sat -- 06:01 AM EDT     Sunrise
Sat -- 10:37 AM EDT     Moonrise
Sat -- 12:40 PM EDT     -0.09 feet Low Tide
Sat -- 05:44 PM EDT     2.26 feet High Tide
Sat -- 07:37 PM EDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
0.30.71.42.22.72.92.82.521.40.90.40-0.10.41.21.82.22.32.11.81.410.7

Weather Map and Satellite Images
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wmap_A
GOES 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.
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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for New York City/Upton, NY (3,6,7,8)
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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.