Monday, March25, 2019 L-36.com


Marine Weather and Tides
Groton, CT

Version 3.4
What's New / NOTES
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.

Sunrise 6:41AMSunset 7:06PM Monday March 25, 2019 6:12 AM EDT (10:12 UTC) Moonrise 12:00AMMoonset 9:46AM Illumination 80% Phase: Waning Gibbous; Moon at 19 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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ANZ340 Peconic And Gardiners Bays- 335 Am Edt Mon Mar 25 2019
Today..NW winds 5 to 10 kt, becoming W late. Waves 1 ft or less. Sprinkles.
Tonight..NW winds 5 to 10 kt, becoming N 10 to 15 kt with gusts up to 20 kt after midnight. Waves 1 ft or less, then around 2 ft after midnight. Sprinkles in the evening, then sprinkles or flurries after midnight.
Tue..N winds 10 to 15 kt. Waves around 2 ft in the morning, then 1 ft or less.
Tue night..N winds 5 to 10 kt. Waves 1 ft or less.
Wed..NE winds around 10 kt, becoming se in the afternoon. Waves 1 ft or less.
Wed night..S winds around 5 kt. Waves 1 ft or less.
Thu..S winds 5 to 10 kt. Waves 1 ft or less.
Thu night..SW winds 10 to 15 kt. Waves 1 ft or less.
Fri..SW winds 5 to 10 kt. Waves 1 ft or less.
Fri night..SW winds around 10 kt. Waves 1 ft or less.
ANZ300 335 Am Edt Mon Mar 25 2019
Synopsis for the long island waters and new york harbor.. A cold front moves across the waters this morning. High pressure then slowly builds from the north and west before settling over the region on Wednesday. The high pressure then shifts offshore late in the week ahead of a slowly approaching frontal system.


7 Day Forecast for Marine Location Near Groton, 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 250823
afdokx
area forecast discussion
national weather service new york ny
423 am edt Mon mar 25 2019

Synopsis
A cold frontal passage occurs this morning. High pressure
builds across the region through midweek. The high then drifts
off into the northern atlantic Thursday into Friday. A weak cold
front passing by early Friday will be followed by brief high
pressure and then a weak warm front moves in. The warm front
moves north of the region Friday night with another cold front
then slowly moving in during the weekend, not crossing the
region until late in the weekend.

Near term through tonight
The cold front was still across cntrl new england at 7z, but
thru kbgm. The boundary will continue swd per the mesoscale
modeling and pass offshore by 13z. Despite a quick shot of llvl
caa this mrng, mixing should allow temps to rise again into the
mid and upr 40s, perhaps touching 50 along the SRN portion of
the cwa.

Some light radar returns across nern pa were not hitting the
ground, ans the modeling, particularly the mesoscale modeling of
the href NAM hrrr are dry today into tngt. The GFS has some lgt
qpf across the SRN half of the cwa. The SREF is very limited
with pcpn chances as well. The area will not be in a favorable
jet region today for pcpn. As the eve progresses, the main batch
of moisture capable of supporting pcpn is mostly confined to
areas S of the cwa. Due to these factors, only sprinkles have
been fcst for today, with perhaps some flurries mixing in tngt
as the boundary layer cools.

A blend of the guidance and raw model data was used for temps
today, with a blend of the nbm, met and mav used for tngt. A
light nly wind is expected to keep temps from reaching pure
radiational cooling potential.

Short term Tuesday
A 1030s high builds over the great lakes, while the frontal
boundary remains over the atlantic. This will keep the area dry,
but with temps about 5-10 degrees blw average. Wind chills look
to remain in the 30s as a 10-15 mph nly flow persists.

Long term Tuesday night through Sunday
The upper level pattern will exhibit the local area staying in
between the subtropical and polar branches of the upper level jet
throughout the long term period. The mid levels will exhibit split
mid level flow Tuesday night through Wednesday night and then this
will transition to zonal flow Thursday through Friday. The mid level
flow becomes more amplified with more SW flow for the weekend.

At the surface, a continental polar airmass with high pressure
settles into northeast from central canada Tuesday night through
Wednesday. It then drifts out into the northern atlantic Wednesday
night through Thursday. A weak cold front approaches the region
Thursday night and moves across early Friday. High pressure builds
more from the southeast us into the local area for Friday briefly.

However the high is weak and quickly gives way to a warm front
developing in response to cyclogenesis over the midwest. The warm
front moves into the region Friday and north of the region Friday
night. A cold front then approaches Saturday and Saturday night and
moves across late in the weekend.

The long term forecast period starting Tuesday night will initially
have a cold airmass building into the region along with dry
conditions. High pressure from central canada will have traversed
the great lakes and this will be then building into the local
region. Colder than normal temperatures are expected Tuesday night
through Wednesday night.

High pressure drifts offshore into the northern atlantic Thursday
into Friday with another low pressure system developing in the
midwest. Conditions will be mainly dry. The transition from zonal
flow Thursday into Friday to more SW amplified flow going into the
weekend will allow for a quick moderation and thereafter warmup of
the airmass. Expecting more in the range of 50 to low 60s for highs
and lows more in the 40s for much of the remainder of the long term
period.

There will be a slight chance of rain showers with a nearby warm
front Friday and then with a slowly approaching cold front during
the weekend northwest of nyc with probabilities for rain showers
increasing to chance Sunday and Sunday night with a cold front
moving across. Some areas north and west of nyc could see some snow
showers on the backside of the cold front Sunday night.

Aviation 09z Monday through Friday
A cold front will pass through this morning, with high pressure
building behind it.

Vfr through the TAF period. W SW winds overnight, generally under 10
kts. Winds turn NW behind the cold front passage. Timing of winds
shifting could be off by an hour or so. Directions expected to
remain right of 310 degrees magnetic aft 11-12z.

Ny metro enhanced aviation weather support...

detailed information, including hourly TAF wind component forecasts,
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 0 mi47 min WNW 5.1 G 6 46°F 1008.4 hPa32°F
NLNC3 - 8461490 - New London, CT 4 mi42 min 46°F 41°F1014.9 hPa
MTKN6 - 8510560 - Montauk, NY 19 mi42 min 46°F 41°F1015.4 hPa
QPTR1 - 8454049 - Quonset Point, RI 41 mi42 min 45°F 42°F1015.4 hPa
44017 - 23 Nautical Miles Southwest of Montauk Point, NY 42 mi82 min SW 9.7 G 14 44°F 41°F4 ft1015.9 hPa (-1.0)39°F
NWPR1 - 8452660 - Newport, RI 42 mi42 min 42°F 38°F1015 hPa
NWHC3 - 8465705 - New Haven, CT 44 mi42 min 50°F 43°F1015.8 hPa
NAXR1 - Narragansett Bay Reserve, RI 46 mi87 min SSW 1.9 43°F 1015 hPa35°F
PRUR1 46 mi42 min 46°F 26°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 46 mi42 min 45°F 1015.6 hPa
CPTR1 - 8452944 - Conimicut Light, RI 48 mi42 min 44°F 42°F

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 mi16 minN 010.00 miOvercast43°F36°F76%1015.3 hPa
Westerly, Westerly State Airport, RI15 mi19 minN 010.00 miOvercast44°F37°F79%1015.5 hPa
Montauk, Montauk Airport, NY17 mi18 minN 0 mi45°F36°F71%1015.9 hPa
Chester, Chester Airport, CT23 mi17 minWNW 410.00 miPartly Cloudy46°F21°F37%1015.2 hPa

Wind History from GON (wind in knots)
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SW6SW9SW13SW11W8W7W8W9W5W9SW6CalmCalmCalm
1 day agoNW13
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2 days agoNE11N12N13N13N12
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Tide / Current Tables for New London, Connecticut
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New London
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Mon -- 01:16 AM EDT     3.15 feet High Tide
Mon -- 06:43 AM EDT     Sunrise
Mon -- 07:58 AM EDT     -0.15 feet Low Tide
Mon -- 09:45 AM EDT     Moonset
Mon -- 01:50 PM EDT     2.42 feet High Tide
Mon -- 07:05 PM EDT     Sunset
Mon -- 08:07 PM EDT     0.15 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.83.132.621.30.70.1-0.10.10.71.41.92.32.42.21.81.30.90.40.20.30.91.6

Tide / Current Tables for The Race, Long Island Sound, New York Current (2) (expired 1993-12-31)
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The Race
Click for Map
Mon -- 12:20 AM EDT     3.51 knots Max Flood
Mon -- 03:27 AM EDT     -0.01 knots Slack
Mon -- 06:43 AM EDT     Sunrise
Mon -- 06:53 AM EDT     -4.01 knots Max Ebb
Mon -- 09:45 AM EDT     Moonset
Mon -- 10:12 AM EDT     0.01 knots Slack
Mon -- 12:53 PM EDT     3.13 knots Max Flood
Mon -- 03:59 PM EDT     -0.01 knots Slack
Mon -- 07:05 PM EDT     Sunset
Mon -- 07:19 PM EDT     -3.36 knots Max Ebb
Mon -- 10:27 PM EDT     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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3.53.32.50.9-1.1-2.6-3.6-4-3.3-2-0.41.42.83.12.71.7-0-1.6-2.7-3.3-3.1-2.1-0.70.9

Weather Map and Satellite Images
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GOES 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.
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Wind Forecast for New York City/Upton, NY (6,6,7,8)
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Ground Weather Radar Station Boston, MA
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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.