Wednesday, March20, 2019 L-36.com


Marine Weather and Tides
Groton Long Point, 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 6:50AMSunset 7:01PM Wednesday March 20, 2019 12:47 AM EDT (04:47 UTC) Moonrise 6:40PMMoonset 6:56AM Illumination 99% Phase: Waxing Gibbous; Moon at 14 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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ANZ237 Block Island Sound- 1021 Pm Edt Tue Mar 19 2019
Overnight..NW winds 5 to 10 kt, diminishing to around 5 kt. Seas around 2 ft, then 1 foot or less.
Wed..SW winds 5 to 10 kt. Seas around 2 ft.
Wed night..S winds 5 to 10 kt, becoming se 10 to 15 kt with gusts up to 20 kt after midnight. Seas 2 to 3 ft.
Thu..SE winds 10 to 15 kt with gusts up to 25 kt. Seas around 4 ft. A chance of rain in the afternoon.
Thu night..SE winds 10 to 15 kt with gusts up to 25 kt. Seas 5 to 6 ft. Rain.
Fri..W winds 15 to 20 kt with gusts up to 30 kt. Seas 6 to 7 ft. A chance of rain in the morning.
Fri night..W winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 35 kt. Seas around 6 ft.
Sat..W winds 20 to 25 kt with gusts up to 35 kt. Seas around 6 ft.
Sat night..NW winds 15 to 20 kt with gusts up to 30 kt. Seas 4 to 5 ft.
Sun..W winds 10 to 15 kt with gusts up to 25 kt. Seas around 4 ft.
Sun night..SW winds 10 to 15 kt with gusts up to 20 kt. Seas around 4 ft. Seas are reported as significant wave height, which is the average of the highest third of the waves. Individual wave heights may be more than twice the significant wave height.
ANZ200 1021 Pm Edt Tue Mar 19 2019
Synopsis for massachusetts and rhode island coastal waters.. High pres will build east over the coastal waters through Wed. Low pres develops and tracks up the eastern seaboard Thu and Fri while intensifying into a gale center. NW gales develop later Fri into Sat. High pres builds across the mid atlc states Sun. For information on possible hazardous weather beyond the 24-36 hour forecast period, please visit www.weather.gov/boston and follow the current hazards link above the map on the left.


7 Day Forecast for Marine Location Near Groton Long Point , CT
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location: 41.3, -71.99     debug


Area Discussion for - New York City/Upton, NY
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Fxus61 kokx 200435
afdokx
area forecast discussion
national weather service new york ny
1235 am edt Wed mar 20 2019

Synopsis
High pressure will remain overhead through Wednesday. Low pressure
will impact the region Thursday into Friday. High pressure will
build in for the second half of the weekend, followed by a cold
frontal passage early next week.

Near term until 6 am this morning
Primary change with this update was to lower overnight lows
tonight as clear skies and light winds are resulting in good
radiational cooling conditions across outlying areas. Across
inland areas and the pine barrens, lows will fall into the lower
to middle 20s, with a few readings in the teens not out of the
question. Temperatures will range from the upper 20s to lower
30s along the coast, with lows remaining in the middle 30s in
and around new york city.

Short term 6 am this morning through 6 pm Thursday
Quiet conditions expected on Wednesday as high pressure moves
offshore. A return flow around to the south will allow for milder
temperatures on Wednesday, with highs in the upper 40s to lower 50s.

A cold front to our west will then increase chances for
precipitation late Wednesday night as it approaches the area.

Temperatures Wednesday night will be in the 30s to near 40.

Long term Thursday night through Tuesday
The 12z models are coming into good agreement that a deepening low
will track roughly thru nyc Thu ngt into early fri. This will
produce mainly rain over the area Thu and early fri. There could be
a little mixing across the interior at the onset if the pcpn arrives
early enough Thu mrng. As the low pulls away, a dry slot will cut
the rain off Fri mrng, with perhaps some dz and fog settling in,
then as the upr low approaches some shwrs possible midday into fri
eve.

Cold pool aloft builds in on sat, resulting in highs blw normal and
sct-bkn CU development. Wly flow aloft develops on Sun and heights
rise, resulting in a quick but solid warming trend. Highs flip to
abv normal a a result.

A cold frontal passage appears on track for mon. The models are in
good agreement wrt timing, but the GFS brings the core of the cold
air swd, as opposed to the ECMWF which keeps it in canada. The
result is that the GFS would be more of an arctic fropa, with the
ecmwf more benign. Temps should soar ahead of the front with wsw
flow and compressional heating. The fcst may be too low ATTM with
consall used.

Temps spring back blw average on Tue with a colder airmass building
in. Dry wx with high pres expanding into the region.

Aviation 06z Wednesday through Sunday
High pressure south of the area will gradually retreat to the
east through Wednesday as a frontal system moves into the ohio
valley.

Vfr. A light and variable flow overnight will become s-sw
Wednesday morning at 5-10 kt, gradually backing to the s-se in
the late afternoon. Winds speeds in the afternoon may be
approach 10 to 15 kt.

Outlook for 00z Thursday through Sunday
Wednesday night Vfr.

Thursday MVFR ifr in rain. SE g20-25kt. Chc pm llws.

Friday MainlyVFR, chance of rain snow showers inland and rain
showers near coast. W-nw g25-30kt.

Saturday Vfr. NW g30kt

Sunday Vfr. W-sw g20kt.

Marine
Quiet conditions are expected on the waters through Wednesday
night as high pressure remains in control. Winds and waves will
build to SCA lvls, especially on the ocean, Thu ahead of low
pres. As the low exits, all areas will hit SCA criteria Fri and
sat. There is a chance for gale force gusts during this time.

The SCA conditions will subside on the protected waters on sun,
then SCA winds are again possible on Mon ahead of a cold front.

The ocean will likely stay close to or at SCA lvls due to high
seas Sun and mon.

Hydrology
No hydrologic impacts are expected through Wednesday night. Around
an inch of rain is possible Thu into early fri. Some minor poor
drainage flooding is possible. Thereafter, no hydrologic
impacts are anticipated thru tue.

Tides coastal flooding
Some areas of minor to localized coastal flooding are possible
thu night into Fri morning as low pres moving over the area
coincides with a full moon.

Equipment
Nyc NOAA weather radio station kwo35 (162.55 mhz) remains off
the air.

Okx watches warnings advisories
Ct... None.

Ny... None.

Nj... None.

Marine... None.

Synopsis... Jmc fig
near term... Feb je
short term... Fig
long term... Dw
aviation... Jc
marine... Jmc fig
hydrology... Jmc fig
tides coastal flooding...

equipment...



Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NLNC3 - 8461490 - New London, CT 7 mi47 min NW 1 G 1.9 33°F 41°F1030.2 hPa
MTKN6 - 8510560 - Montauk, NY 17 mi47 min 38°F 41°F1030.3 hPa (+0.5)
QPTR1 - 8454049 - Quonset Point, RI 37 mi47 min WNW 4.1 G 6 38°F 41°F1030.3 hPa (+0.6)
NWPR1 - 8452660 - Newport, RI 38 mi47 min NW 2.9 G 5.1 38°F 38°F1030.1 hPa (+0.7)
44017 - 23 Nautical Miles Southwest of Montauk Point, NY 42 mi57 min WSW 9.7 G 12 41°F 40°F2 ft1030.7 hPa (+0.5)33°F
NAXR1 - Narragansett Bay Reserve, RI 42 mi62 min WNW 4.1 34°F 1030 hPa20°F
PRUR1 42 mi47 min 35°F 18°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 42 mi47 min NW 2.9 G 5.1 36°F 1030.5 hPa (+0.7)
CPTR1 - 8452944 - Conimicut Light, RI 45 mi47 min W 6 G 8 36°F 41°F
FOXR1 - 8454000 - Providence, RI 47 mi47 min NW 4.1 G 5.1 36°F 39°F1029.7 hPa (+0.8)
PVDR1 47 mi47 min Calm G 1.9 36°F 1030.2 hPa (+0.8)16°F
NWHC3 - 8465705 - New Haven, CT 49 mi47 min SE 1 G 1.9 36°F 41°F1030.7 hPa (+0.8)

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, CT4 mi51 minN 010.00 miFair29°F23°F78%1030.2 hPa
Westerly, Westerly State Airport, RI11 mi54 minN 010.00 miFair30°F25°F82%1030.4 hPa
Montauk, Montauk Airport, NY16 mi53 minW 3 mi38°F30°F76%1030.6 hPa
Block Island State Airport, RI23 mi51 minWSW 510.00 miFair37°F30°F76%1030.9 hPa

Wind History from GON (wind in knots)
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Last 24hrN3CalmCalmCalmCalmCalmCalmSW4NW8NW10NW9N11SW14
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1 day agoNW12N6NW4CalmN3Calm--CalmW10W8W10
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Tide / Current Tables for Noank, Mystic River entrance, Connecticut
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Noank
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Wed -- 03:24 AM EDT     -0.39 feet Low Tide
Wed -- 06:51 AM EDT     Sunrise
Wed -- 06:55 AM EDT     Moonset
Wed -- 09:10 AM EDT     2.87 feet High Tide
Wed -- 03:51 PM EDT     -0.42 feet Low Tide
Wed -- 06:39 PM EDT     Moonrise
Wed -- 06:59 PM EDT     Sunset
Wed -- 09:35 PM EDT     2.86 feet High Tide
Wed -- 09:43 PM EDT     Full Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.30.60-0.4-0.30.31.222.62.92.72.31.610.3-0.2-0.4-00.81.62.32.82.82.5

Tide / Current Tables for The Race, Long Island Sound, New York Current (2) (expired 1993-12-31)
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The Race
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Wed -- 02:40 AM EDT     -4.64 knots Max Ebb
Wed -- 05:50 AM EDT     0.00 knots Slack
Wed -- 06:52 AM EDT     Sunrise
Wed -- 06:56 AM EDT     Moonset
Wed -- 08:40 AM EDT     4.25 knots Max Flood
Wed -- 11:44 AM EDT     -0.01 knots Slack
Wed -- 03:05 PM EDT     -4.80 knots Max Ebb
Wed -- 06:15 PM EDT     0.00 knots Slack
Wed -- 06:40 PM EDT     Moonrise
Wed -- 07:00 PM EDT     Sunset
Wed -- 09:06 PM EDT     4.33 knots Max Flood
Wed -- 09:43 PM EDT     Full Moon
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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-1.5-3.2-4.4-4.6-3.5-1.70.42.644.23.41.7-0.6-2.7-4.1-4.8-4.2-2.6-0.61.73.64.33.92.6

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 (0,6,7,8)
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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.