Saturday, January20, 2018 L-36.com


Marine Weather and Tides
Groton, 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 7:07AMSunset 4:52PM Saturday January 20, 2018 9:38 PM EST (02:38 UTC) Moonrise 10:11AMMoonset 9:25PM Illumination 19% Phase: Waxing Crescent; Moon at 4 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- 917 Pm Est Sat Jan 20 2018
Overnight..W winds 5 to 10 kt. Seas 1 ft or less.
Sun..W winds around 5 kt. Seas 1 ft or less.
Sun night..W winds around 5 kt, becoming N after midnight. Seas 1 ft or less.
Mon..E winds 5 to 10 kt. Seas 1 ft or less. Chance of rain. Areas of fog. Vsby 1 to 3 nm.
Mon night..E winds around 10 kt, becoming se with gusts up to 20 kt after midnight. Seas 1 ft or less. Chance of showers in the evening, then showers likely after midnight.
Tue..S winds 10 to 15 kt with gusts up to 30 kt. Seas 2 to 3 ft. Showers. Vsby 1 to 3 nm.
Tue night..W winds 10 to 15 kt with gusts up to 25 kt. Seas 2 to 3 ft.
Wed..W winds around 15 kt. Seas around 2 ft.
Wed night..NW winds 10 to 15 kt. Seas around 2 ft.
Thu..NW winds 10 to 15 kt. Seas around 2 ft.
Thu night..NW winds 10 to 15 kt. Seas around 2 ft.
ANZ300 917 Pm Est Sat Jan 20 2018
Synopsis for the long island waters and new york harbor.. High pressure remains south of the waters through the weekend. A warm front approaches Sunday night and moves through the area late Monday into Monday night. A cold front the moves across the waters on Tuesday. High pressure builds over the area Wednesday through Friday and moves offshore Saturday.

7 Day Forecast for Marine Location Near Groton city, CT
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location: 41.3, -72.08     debug


Area Discussion for - New York City/Upton, NY
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Fxus61 kokx 210223
afdokx
area forecast discussion
national weather service new york ny
923 pm est Sat jan 20 2018

Synopsis
High pressure remains south of the region through the weekend. A
weak cold front will pass through the area tonight. A warm
front, associated with low pressure moving into the upper
midwest Monday, approaches Sunday night and moves through the
area late Monday into Monday night. The low tracks across the
great lakes region and through eastern canada Monday night
through Tuesday night, bringing as cold front across the region
Tuesday. High pressure builds over the area Wednesday through
Friday and moves offshore Saturday.

Near term until 6 am Sunday morning
Forecast remains on target. The only tweak was to lower
temperatures at fok as readings have been running colder than
forecast.

Otherwise, high pressure will remain south of the area. Lows
tonight fall into the 20s and lower 30s. The nyc metro area may
remain in the middle 30s all night.

Short term 6 am Sunday morning through Sunday night
Slightly cooler air is anticipated for Sunday, but high pressure
remains in control to our south. Highs will be a good 8-10
degrees cooler than Saturday, in the lower to middle 40s.

12z NAM continues to show the potential for some stratus to
develop under a strengthening subsidence inversion Sunday
afternoon. There is a higher probability for this to occur
across pa and points west. If stratus does develop this far
east, temperatures may be a few degrees cooler than forecast.

Clouds increase Sunday night along with the possibility of some
light precipitation development Sunday night into early Monday
morning as a warm front moves towards the region. Will keep
chances a slight chance for now, and most of the precipitation
will be plain rain, however there is the potential for an icy
mix across lower hudson valley and southern ct in this pattern.

Any icy mix would result in a hazardous Monday morning commute
for these areas.

Long term Monday through Saturday
Rather strong continuity with model guidance remains with a
frontal system that will be impacting the region late Sunday
night through Tuesday night. As is typical of the ECMWF the low
is a bit slower and not as deep as both the NAM and gfs,
especially Monday night into Tuesday. A blend of the model
guidance and current forecast will keep forecast close to
continuity.

There is uncertainty with the passage of a warm front Monday.

Typical cold air damming is not in place Monday as high pressure
will be moving across southern central canada with more of a
west to east configuration. In addition mid and upper flow is
initially more zonal and progressive, then as the upper trough
deepens and moves east flow becomes more southerly by late in
the day. Without the cold air in place to the north, the warm
front is expected to move through later Monday afternoon,
especially along the coast, and inland early Monday night. Also,
without the colder air in place the chances for freezing rain
across the interior have diminished, with areas possible at this
time across the northern zones. Otherwise rain is expected and
with strong lift and a low level jet, along with influx of gulf
of mexico moisture, periods of moderate to heavy rain will be
Tuesday. A rumble of thunderstorm will also be possible.

After the passage of the cold front and upper trough heights
will be rising and surface canadian high pressure will be
building in with an extended period of colder and dry weather
into next weekend.

Aviation 03z Sunday through Thursday
High pressure remains centered to our south through the taf
period.

W winds under 10 kt at city terminals tonight with light and
variable winds elsewhere. Light NW winds will continue on Sunday
before gradually backing to the w-sw late in the day.

Vfr through much of the TAF period. Potential for MVFR ceilings
increases Sunday evening.

Outlook for 00z Monday through Thursday
Sunday night MVFR possible.

Monday MVFR or ifr in chance of -ra. A light wintry mix possible
across interior early Monday.

Tuesday Ifr or lifr in rain. Llws. S winds g25kt morning, wsw
winds g30-35kt possible near the coast in the afternoon.

Wednesday Vfr. Wnw g25-30kt.

Thursday Vfr. NW winds g20kt.

Marine
Seas have fallen to near 5 ft at buoy 44097, with seas lower
further to the west. The SCA for anz350 has been cancelled.

Conditions will remain below SCA through Sunday night.

As a warm front moves into the forecast waters Monday and early
Monday night winds and seas are expected to remain below SCA levels.

Once the warm front moves through and winds shift to southerly, and
increase as a cold front approaches, wind gusts will increase late
Monday night through Tuesday. Gusts will likely reach SCA levels
late Monday night into Tuesday across all the waters. With a low
level inversion in place Tuesday higher winds aloft will be
difficult to mix down to the water.

However, there will be the potential for ocean gusts to be near gale
force for several hours during the day Tuesday. Otherwise, with the
increased southerly flow, ocean seas will be building to small craft
levels Tuesday.

There may be a brief period of sub small craft winds late Tuesday
into Tuesday night. Then, once colder air filters into the waters
behind a cold front small craft level wind gusts will be likely
across all the waters late Tuesday night into Thursday morning.

Ocean seas will be slowly subsiding into the northwest flow
Thursday.

Hydrology
A frontal system passing through late Sunday night through Tuesday
has the potential to produce 1 to 1 1 2 inches of rain. No
significant hydrologic issues are anticipated at this time.

Equipment
Nyc NOAA weather radio station kwo-35 (162.55 mhz) is off the
air for an extended period of time.

Okx watches warnings advisories
Ct... None.

Ny... None.

Nj... None.

Marine... None.

Synopsis... Bc 19
near term... Bc 19 ds
short term... Bc
long term... 19
aviation... Ds
marine... Bc 19
hydrology... Bc 19
equipment...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LDLC3 - New London Ledge CT - Ledge Light Weather 0 mi163 min W 9.9 G 11 39°F 1016.6 hPa33°F
NLNC3 - 8461490 - New London, CT 4 mi50 min W 1.9 G 4.1 41°F 37°F1014.7 hPa
MTKN6 - 8510560 - Montauk, NY 19 mi50 min 43°F 35°F1015.1 hPa
44039 - Central Long Island Sound 32 mi53 min WSW 7.8 G 9.7 38°F 1 ft
QPTR1 - 8454049 - Quonset Point, RI 41 mi56 min SW 5.1 G 6 41°F 35°F1014 hPa
NWPR1 - 8452660 - Newport, RI 42 mi50 min SW 5.1 G 6 42°F 35°F1013.8 hPa
NWHC3 - 8465705 - New Haven, CT 44 mi50 min SW 1.9 G 2.9 41°F 35°F1015.9 hPa
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 46 mi56 min W 4.1 G 5.1 41°F 1013.8 hPa
NAXR1 - Narragansett Bay Reserve, RI 46 mi113 min W 5.1 42°F 994 hPa27°F
CPTR1 - 8452944 - Conimicut Light, RI 48 mi50 min W 5.1 G 6 43°F 35°F1013.8 hPa

Wind History for New London, CT
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Groton / New London, Groton / New London Airport, CT3 mi42 minW 810.00 miFair42°F26°F53%1014.8 hPa
Westerly, Westerly State Airport, RI15 mi45 minW 410.00 miFair40°F30°F70%1014.8 hPa
Montauk, Montauk Airport, NY17 mi44 minW 6 mi44°F28°F55%1015.6 hPa
Chester, Chester Airport, CT23 mi43 minVar 410.00 miFair39°F26°F61%1014.9 hPa

Wind History from GON (wind in knots)
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Last 24hrCalmCalmSW8SW8SW7SW7W10SW7SW8SW12SW14
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1 day agoNW9NW11NW11NW8NW8W5W6W7W8W8W8W11W75SW9SW11SW11SW12SW11W9W7W7W5W5
2 days agoN8NW9NW10NW9N4N11N11N7N7N9N11
G19
N9N7NW8NW13NW13N11N9NW12N7NW9NW8NW6NW8

Tide / Current Tables for Silver Eel Pond, Fishers Island, N.Y.
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Silver Eel Pond
Click for Map
Sat -- 05:32 AM EST     0.23 feet Low Tide
Sat -- 07:08 AM EST     Sunrise
Sat -- 09:11 AM EST     Moonrise
Sat -- 10:56 AM EST     2.35 feet High Tide
Sat -- 04:49 PM EST     Sunset
Sat -- 06:04 PM EST     -0.05 feet Low Tide
Sat -- 08:24 PM EST     Moonset
Sat -- 11:34 PM EST     2.09 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.91.51.10.80.50.30.30.71.31.92.22.32.21.81.30.80.40.1-0.10.10.71.31.82

Tide / Current Tables for The Race, Long Island Sound, New York Current
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The Race
Click for Map
Sat -- 01:16 AM EST     -0.00 knots Slack
Sat -- 04:18 AM EST     -2.76 knots Max Ebb
Sat -- 07:09 AM EST     Sunrise
Sat -- 07:20 AM EST     0.00 knots Slack
Sat -- 09:11 AM EST     Moonrise
Sat -- 10:13 AM EST     2.62 knots Max Flood
Sat -- 01:20 PM EST     -0.00 knots Slack
Sat -- 04:36 PM EST     -3.06 knots Max Ebb
Sat -- 04:49 PM EST     Sunset
Sat -- 07:46 PM EST     0.01 knots Slack
Sat -- 08:24 PM EST     Moonset
Sat -- 10:40 PM EST     2.70 knots Max Flood
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
1.50.3-0.9-2.1-2.7-2.6-1.7-0.40.922.62.41.50.4-0.8-2.1-2.9-3-2.3-10.31.62.52.7

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 (21,6,7,8)
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Ground Weather Radar Station Boston, MA
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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.