Saturday, March28, 2020
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Marine Weather and Tides
Groton, CT

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:35AMSunset 7:10PM Saturday March 28, 2020 4:35 PM EDT (20:35 UTC) Moonrise 8:55AMMoonset 11:22PM Illumination 23% Phase: Waxing Crescent; Moon at 5 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- 330 Pm Edt Sat Mar 28 2020
.small craft advisory in effect from 10 pm edt this evening through Sunday afternoon...
Tonight..E winds around 10 kt, increasing to 15 to 20 kt with gusts up to 25 kt late this evening and overnight. Waves 1 ft or less, then around 2 ft after midnight. Occasional rain this evening, then occasional rain and drizzle after midnight. Patchy fog after midnight with vsby 1 to 3 nm.
Sun..E winds 15 to 20 kt with gusts up to 25 kt. Waves 2 to 3 ft. Occasional rain and drizzle in the morning, then light rain and drizzle in the afternoon. Patchy fog in the morning. Areas of fog in the afternoon. Vsby 1 to 3 nm.
Sun night..E winds 10 to 15 kt with gusts up to 20 kt, becoming N 5 to 10 kt after midnight. Waves 2 to 3 ft in the evening, then 1 ft or less. Light rain and drizzle likely in the evening. Areas of fog. Vsby 1 to 3 nm.
Mon..NW winds 5 to 10 kt. Waves 1 ft or less. Chance of showers in the afternoon.
Mon night..N winds 5 to 10 kt. Waves 1 ft or less. Chance of showers in the evening.
Tue..NE winds 5 to 10 kt. Waves 1 ft or less.
Tue night..E winds 5 to 10 kt. Waves 1 ft or less.
Wed..NE winds around 10 kt. Waves 1 ft or less.
Wed night..N winds 10 to 15 kt. Waves 1 ft or less.
Thu..NW winds 10 to 15 kt. Waves 1 ft or less.
Thu night..NW winds around 10 kt. Waves 1 ft or less.
ANZ300 330 Pm Edt Sat Mar 28 2020
Synopsis for the long island waters and new york harbor.. A warm front will continue to approach from the south overnight, stalling just south of long island Sunday morning. Weak low pressure and a trailing cold front will then move across the waters Sunday night. Low pressure over the western great lakes and new england weakens Monday into Tuesday. Another low passes well south and east during the middle of the week, followed by high pressure to close out the week.


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 282027 AFDOKX

Area Forecast Discussion National Weather Service New York NY 427 PM EDT Sat Mar 28 2020

SYNOPSIS. A warm front will continue to approach from the south overnight, stalling just south of Long Island Sunday morning. Weak low pressure and a trailing cold front will then move across the area Sunday night. Low pressure over the western Great Lakes and New England weakens Monday into Tuesday. Another low will pass well south and east during the middle of the week, followed by high pressure to close out the week.

NEAR TERM /UNTIL 6 AM SUNDAY MORNING/. A closed upper low will track toward the Great Lakes tonight, while a high amplitude ridge will work off the eastern seaboard. This will place the area under prolonged period of large scale warm advection. Occasional rain will continue through the night and at times could become moderate. Toward daybreak, as mid level dry air works in aloft, the rain may transition to light rain and drizzle. While all the dynamics are displaced well west of the area, there is decent thermal forcing through the overnight as a 35-40 kt southerly LLJ works across the area.

East winds will strengthen through tonight with the potential for gusts up to 25 mph, mainly near the coast.

Lows will remain well above normal, generally in the mid 40s.

SHORT TERM /6 AM SUNDAY MORNING THROUGH SUNDAY NIGHT/. Warm front stalls just south of Long Island on Sunday with occasional rain and drizzle through most of the day. Gusty east winds along the coast in the morning will diminish through the afternoon. A frontal wave will then approach from the west in the afternoon. While there is marginal elevated instability in the afternoon with height falls aloft, there is no surface based instability and the forcing is week. There could be a brief shower in the evening hours as a weak cold front passes through the area, otherwise any light rain and/or drizzle will taper off during the evening hours.

Highs Sunday will be around 50, with lows again the 40s.

LONG TERM /MONDAY THROUGH SATURDAY/. Stacked low pressure over the western Great Lakes region will track southeast into northern and central New York Monday morning into Tuesday morning, weakening as it does so. Associated cold pool aloft will lead to some instability, while at the surface, an inverted trough will be in place. This will allow enough instability and lift for some light showers through the period, though exactly where they will be is still uncertain. However, highest chances would be for areas closest to the stacked low, which would be for more northern portions of the forecast area. Best chances for showers would be Monday afternoon into the first part of Monday night.

Mainly dry conditions are then forecast Tuesday afternoon through the rest of the week. However, there will be chances for passing showers as a coastal low passes well south and east late Tuesday night into Wednesday, mainly across western and southern sections.

As the storm intensifies and expands well east of the region Thursday night, the western edge of the precipitation field will move westward toward our area. Some vorticity maxima may move through aloft, as well as spokes of surface troughs rotating around the low which will aid in the possibility for showers, but right now, looks to only be a slight chance for extreme eastern areas.

Thereafter, dry conditions are forecast through the end of the week with high pressure building in.

Other than some above normal temperatures for Monday, seasonable temperatures are expected through the week.

AVIATION /21Z SATURDAY THROUGH THURSDAY/. A warm front will approach from the southwest through tonight, and become stationary to the south on Sunday.

VFR initially, then lowering to MVFR toward evening and IFR tonight with rain moving in and becoming more steady. There will be LIFR at times in ceilings and visibilities overnight into early Sunday with fog in the forecast as well. Timing of lower ceilings and flight categories could be off by 1-2 hours.

NE winds around 10 kt, possible up to 15 kt near the coast through tonight. NE winds may weaken gradually through Sunday.

OUTLOOK FOR 18Z SUNDAY THROUGH THURSDAY. Sunday. Rain, drizzle, fog, with widespread IFR-LIFR conds. VLIFR possible attm especially along the coast. Conditions improving Sunday night, becoming VFR toward Monday morning. E winds G15-20 kt gradually taper off in the afternoon. Monday. Mainly VFR. Widely scattered showers possible in the afternoon and at night. Tuesday. Mainly VFR. Possible light rain at night. Wednesday. Mainly VFR. Slight chance of showers. Thursday. VFR.

MARINE. East winds will continue to gradually strengthen through the evening with SCA conditions developing across all waters with gusts 25 to 30 kt. Seas will build to 5 to 8 ft on the ocean and 2 to 4 ft on the sound, possibly as high as 5 ft in spots. Winds will diminish from west to east on Sunday as the pressure gradient relaxes. However, SCA seas are expected to linger on the ocean waters through Sunday night.

Waves on the ocean waters will remain around 5 ft Monday, diminishing slowly through the day, falling below 5 ft early Monday night. Thereafter, light winds will lend to sub SCA waves.

A coastal storm will pass well south and east of the region in the middle of the week, however it will pass far enough south to allow winds to remain below 25 kt through the forecast period.

HYDROLOGY. Rainfall amounts through Sunday evening will range from 0.50 to 0.75 inches. This will be falling over a long period of time, so no hydrologic impacts are expected with this system. No hydrologic impacts are anticipated through the coming week.

EQUIPMENT. NYC NOAA Weather Radio Station KWO35 (162.55 MHz) is undergoing its final stages of testing, and is operating at full power.

OKX WATCHES/WARNINGS/ADVISORIES. CT . None. NY . None. NJ . None. MARINE . Small Craft Advisory from 10 PM this evening to noon EDT Sunday for ANZ335-338. Small Craft Advisory from 10 PM this evening to 6 PM EDT Sunday for ANZ330-340-345. Small Craft Advisory until 6 AM EDT Monday for ANZ350-353-355.

SYNOPSIS . JP/DW NEAR TERM . DW SHORT TERM . DW LONG TERM . JP AVIATION . Goodman/DS MARINE . JP/DW HYDROLOGY . JP/DW 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 mi41 min E 12 G 14 46°F 1018.1 hPa38°F
NLNC3 - 8461490 - New London, CT 4 mi66 min E 6 G 8.9 48°F 44°F1020.7 hPa
MTKN6 - 8510560 - Montauk, NY 19 mi66 min 47°F 45°F1021 hPa
QPTR1 - 8454049 - Quonset Point, RI 41 mi66 min SSE 8.9 G 12 48°F 46°F1021.6 hPa
NWPR1 - 8452660 - Newport, RI 42 mi66 min ESE 11 G 13 47°F 40°F1021.2 hPa
NWHC3 - 8465705 - New Haven, CT 44 mi66 min E 5.1 G 7 48°F 44°F1019.5 hPa
NAXR1 - Narragansett Bay Reserve, RI 46 mi111 min S 4.1 52°F 1022 hPa29°F
PRUR1 46 mi66 min 49°F 32°F
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 46 mi66 min S 2.9 G 8.9 50°F 1021.8 hPa
CPTR1 - 8452944 - Conimicut Light, RI 48 mi66 min SSE 9.9 G 11 48°F 47°F1021.2 hPa

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, CT3 mi1.7 hrsE 1010.00 miOvercast48°F34°F58%1020.7 hPa
Westerly, Westerly State Airport, RI15 mi43 minESE 710.00 miOvercast50°F35°F57%1021 hPa
Montauk, Montauk Airport, NY17 mi42 minVar 5 mi48°F42°F80%1020.6 hPa
Chester, Chester Airport, CT23 mi41 minVar 45.00 miLight Rain46°F37°F71%1019.6 hPa

Link to 5 minute data for KGON

Wind History from GON (wind in knots)
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Last 24hrNW11NW8NW8NW7N6N3N4N7N6N5N4N5N6N4NE3NE6NE8E8E7E10E8E10E10E8
1 day agoSW12SW7SW6SW8SW10SW9SW7SW8SW7SW6SW6W7W7W8SW8W7W9W8N11NW12N12NW12
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2 days agoE17NE16NE16
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Tide / Current Tables for New London, Connecticut
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New London
Click for Map
Sat -- 12:24 AM EDT     2.78 feet High Tide
Sat -- 06:37 AM EDT     Sunrise
Sat -- 07:20 AM EDT     0.24 feet Low Tide
Sat -- 08:54 AM EDT     Moonrise
Sat -- 12:50 PM EDT     2.28 feet High Tide
Sat -- 07:09 PM EDT     Sunset
Sat -- 07:22 PM EDT     0.51 feet Low Tide
Sat -- 11:22 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.82.72.41.91.30.90.50.30.30.81.41.92.22.32.11.71.30.90.70.50.611.62.2

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
Sat -- 02:33 AM EDT     -0.01 knots Slack
Sat -- 06:00 AM EDT     -3.01 knots Max Ebb
Sat -- 06:37 AM EDT     Sunrise
Sat -- 08:54 AM EDT     Moonrise
Sat -- 09:17 AM EDT     0.01 knots Slack
Sat -- 12:00 PM EDT     2.39 knots Max Flood
Sat -- 02:59 PM EDT     -0.00 knots Slack
Sat -- 06:11 PM EDT     -2.50 knots Max Ebb
Sat -- 07:09 PM EDT     Sunset
Sat -- 09:17 PM EDT     0.00 knots Slack
Sat -- 11:22 PM EDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.51.80.8-0.7-2.1-2.8-3-2.7-1.6-0.30.81.92.421.2-0-1.4-2.2-2.5-2.4-1.6-0.30.81.8

Weather Map
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wmap_A
GEOS 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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Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for New York City/Upton, NY (16,3,4,5)
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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 numerous 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.