Tuesday, April7, 2020
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Marine Weather and Tides
Norwich, 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 6:18AMSunset 7:21PM Tuesday April 7, 2020 4:39 PM EDT (20:39 UTC) Moonrise 6:57PMMoonset 6:26AM Illumination 100% Phase: Full Moon; Moon at 15 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- 416 Pm Edt Tue Apr 7 2020
Tonight..SW winds 10 to 15 kt, diminishing to around 5 kt after midnight. Seas 2 to 3 ft. A chance of rain with isolated tstms after midnight.
Wed..NE winds 5 to 10 kt. Seas around 2 ft. Patchy fog. Rain likely. Vsby 1 to 3 nm.
Wed night..SE winds 5 to 10 kt. Seas around 2 ft.
Thu..SE winds 10 to 15 kt with gusts up to 20 kt, becoming S 15 to 20 kt with gusts up to 30 kt in the afternoon. Seas 3 to 5 ft. Patchy fog. Showers. Vsby 1 nm or less.
Thu night..W winds 15 to 20 kt, increasing to 20 to 25 kt after midnight. Gusts up to 30 kt. Seas 4 to 7 ft. A chance of showers.
Fri and Fri night..W winds 20 to 25 kt with gusts up to 30 kt. Seas 4 to 7 ft.
Sat..W winds 15 to 20 kt. Seas 3 to 5 ft.
Sat night..W winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 4 ft.
Sun..SW winds 10 to 15 kt. Seas around 2 ft.
Sun night..S winds 15 to 20 kt with gusts up to 25 kt. Seas 3 to 5 ft. Showers likely. Vsby 1 to 3 nm. Winds and seas higher in and near tstms. 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 416 Pm Edt Tue Apr 7 2020
Synopsis for massachusetts and rhode island coastal waters.. Low pressure exits the great lakes and tracks south of new england early Wednesday, then across georges bank and finally out to sea. Then a strong cold front crosses new eng Thu afternoon. Low pres develops on this front in new england, intensifying as it moves into the gulf of maine Thu night then into the maritimes Fri. High pressure will be centered southeast of the waters for Sat. 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 Norwich, CT
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location: 41.52, -72.08     debug


Area Discussion for - New York City/Upton, NY
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FXUS61 KOKX 071946 AFDOKX

Area Forecast Discussion National Weather Service New York NY 346 PM EDT Tue Apr 7 2020

SYNOPSIS. A warm front approaches tonight along with an area of low pressure. The low passes through late tonight and exits east Wednesday. A cold front then passes through on Thursday. An associated low will pull away into the Canadian Maritimes on Friday, followed by high pressure building from the west on Saturday. Low pressure will then approach from the west on Sunday and impact the area Sunday night into Monday.

NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/. A warm front will approach from the SW tonight. At the same time, low pressure across the Great Lakes will track along the approaching warm front. Models remain in fairly good agreement with timing of the arrival of rain ahead of the front. Chances of rain begin west of the Hudson this evening, then rain eventually becomes likely west to east overnight. Will leave in a low chance of thunder for parts of the forecast area as models show some elevated instability and enough low-mid level lift.

SHORT TERM /6 AM WEDNESDAY MORNING THROUGH THURSDAY NIGHT/. A weak north to northeast flow occurs behind the departure of low pressure Wednesday morning. Plenty of moisture remains beneath 800mb, so clouds won't have much of any chance to scour out. Even after rain chances drop off early in the morning, cannot rule out a chance of an afternoon. This chance will be focused more towards the western zones during the afternoon where models depict convergence along a surface trough just off to our west. Prefer the cooler guidance for high temperatures given the anticipated cloud cover and NE low level flow in the afternoon. Dry weather should then follow for Wednesday night.

A cold front approaches on Thursday and passes through late in the morning/earlier portion of the afternoon. Models in good agreement with rain/showers with this cold front. Shear will be strong and synoptic lift will be deep with the core of a jet streak eventually passing not too far to our south. How much CAPE we actually get ahead of the cold front is questionable as an onshore flow and low level moisture probably starts us off with mostly cloudy conditions. Even with low CAPE, strong lift and shear probably results in a line of showers with embedded thunderstorms moving through. Biggest threat with these showers would be strong wind gusts. Breezy and dry behind the front late in the day into Thursday night. Just a slight chance of mixed rain/snow showers well NW of the city late at night.

LONG TERM /FRIDAY THROUGH TUESDAY/. Reasoning from previous forecasts remains relatively similar, with some changes based on latest guidance that were hinted at yesterday. To start, expect brisk conds on Fri, with isold-sct showers as low pressure pulls away. Inland sections especially the higher elevations could see some snow mixed in during the morning. W-NW winds will be on the brisk side due to the departing low's tight pres gradient, so expect winds at or near advy criteria in the greater NYC metro area and across Long Island, and possibly elsewhere.

High pressure then builds across Sat into Sat night. Guidance shows more nrn stream interaction with a srn stream low pressure system approaching for Sunday into Mon, and so have gone with its slower trend. That guidance is also decidedly wetter and windier, which makes sense given the strengthening offshore high and long S fetch, at least per ECMWF. GFS fcsts a secondary low to develop along the coast which, if it develops, would probably result in a stout E-SE rather than S flow. Given the very good warmth/moisture transport via either a S fetch or enhanced convergence/lift va a secondary low, heavy rain also looks like a good bet, with axis of heaviest rain a little to early to know for certain.

Temps about 5-8 deg below normal on Fri, with highs in the lower/mid 50s, will moderate somewhat on Sat to mid/upper 50s, still slightly below avg. Temps on Sunday/Mon ahead of the approaching low should warm up, with upper 50s to mid 60s on Sunday, and 60s to lower 70s on Mon, highest away from the coast.

AVIATION /20Z TUESDAY THROUGH SUNDAY/. A frontal sys passes late tngt into Wed mrng.

VFR thru at least 3Z, then -ra develops with MVFR likely. There is a low chc of IFR cigs 6-12Z. Mainly MVFR is expected to linger on Wed. The best chc for breaks to VFR will be aft 16Z.

Sea breeze flow will continue to develop this aftn. Amendments can be expected for timing. Winds decrease tngt, then aft the fropa, NW flow veers gradually to the E on Wed. Speeds generally aob 10 kt.

OUTLOOK FOR 18Z WEDNESDAY THROUGH SUNDAY. Rest of Wed. Mainly MVFR. Thu. MVFR in the mrng, becoming VFR. LLWS possible in the mrng. Fri. VFR with W winds 25-35kt. Sat-Sun. VFR.

MARINE. Sub-SCA conditions are expected to remain on all waters through Wednesday night.

A cold front will approach the waters on Thursday increasing wind gusts to SCA levels on all waters. Ocean seas will also build, reaching 6-7 feet Thursday night and up to 10 feet on Friday.

W-NW gales may be possible on Friday, especially near shore and also on the outer ocean waters. SCA conds in all waters Fri evening should take some time to diminish, with quiet conds not returning til late day Sat or Sat night.

Increasing S flow between a strengthening offshore high and approaching low pressure may bring SCA conds to all waters Sunday night. Some gale force wind gusts may be possible on the ocean waters late.

FIRE WEATHER. Wetting rains on Thu should help limit fire growth potential on Fri despite string winds and low afternoon RH. With some drying out Sat could be a day of concern, with W winds still gusting to 30 mph and min RH 20-30%.

HYDROLOGY. Just a quarter to half inch of rainfall expected late tonight through Wednesday morning. Same amounts for Thursday's system, but locally higher amounts could be realized. Low chance of minor nuisance flooding on Thursday.

QPF for the low pressure system Sunday night into Mon has trended wetter, with amts of 1-2 inches fcst. This may be capable of causing some minor areal and small stream issues.

TIDES/COASTAL FLOODING. A coastal flood statement remains for tonight's high tide has for Lower New York Harbor, south shore back bays of western Long Island, and for locations adjacent to western Long Island Sound. The coastal flood statement has also been extended through Wednesday morning/early afternoon high tide for the same locations except locations adjacent to western Long Island Sound in northern Nassau and northwest Suffolk. Additional statements and/or advisories are likely through Wednesday night.

Astronomical tides will be increasing through Wednesday due to a full moon (supermoon). There could be a few locations that get close tonight into Wednesday morning/early afternoon. Much of the guidance continues to point toward Wednesday night having the greatest potential for widespread minor and even localized moderate flooding.

Most locations during this time need anywhere from 1/2 to 1 1/2 ft of surge to reach minor coastal flood benchmarks. During this time, there is little in the way of wind forcing or tidal piling. The main factor will be the high astronomical tides and background positive tidal anomaly.

Minor coastal flooding is also possible on Thursday as astronomical tides remain high. There will also be a strong cold front passage that may bring a bit stronger wind forcing.

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 . Coastal Flood Advisory from 11 PM Wednesday to 2 AM EDT Thursday for CTZ009-010. NY . Coastal Flood Advisory from 11 PM Wednesday to 2 AM EDT Thursday for NYZ071-078-177. Coastal Flood Advisory from 8 PM to 11 PM EDT Wednesday for NYZ074-075-178-179. Coastal Flood Advisory from 10 PM Wednesday to 1 AM EDT Thursday for NYZ080. NJ . Coastal Flood Advisory from 8 PM to 11 PM EDT Wednesday for NJZ006-106-108. MARINE . None.

SYNOPSIS . JC/Goodman NEAR TERM . JC SHORT TERM . JC LONG TERM . Goodman AVIATION . MARINE . JC/Goodman FIRE WEATHER . Goodman HYDROLOGY . JC/Goodman TIDES/COASTAL FLOODING . EQUIPMENT .


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
NLNC3 - 8461490 - New London, CT 11 mi52 min SW 13 G 19 60°F 49°F1008.3 hPa
LDLC3 - New London Ledge CT - Ledge Light Weather 15 mi45 min WSW 13 G 14 52°F 1006.6 hPa37°F
MTKN6 - 8510560 - Montauk, NY 33 mi52 min 54°F 48°F1009.4 hPa
QPTR1 - 8454049 - Quonset Point, RI 36 mi52 min W 8 G 8.9 58°F 48°F1008.1 hPa
NAXR1 - Narragansett Bay Reserve, RI 40 mi115 min NW 5.1 66°F 1009 hPa32°F
NWPR1 - 8452660 - Newport, RI 40 mi52 min SSW 15 G 19 49°F 41°F1008.2 hPa
PTCR1 - 8452951 - Potter Cove, Prudence Island, RI 40 mi52 min NW 7 G 13 65°F 1008.4 hPa
CPTR1 - 8452944 - Conimicut Light, RI 41 mi52 min 60°F 51°F1007.7 hPa
FOXR1 - 8454000 - Providence, RI 41 mi58 min N 14 G 20 64°F 46°F1007.8 hPa
PVDR1 41 mi52 min W 6 G 13 63°F 1007.9 hPa27°F
PRUR1 42 mi52 min 56°F 35°F
NWHC3 - 8465705 - New Haven, CT 47 mi52 min SSW 8 G 9.9 55°F 50°F1008 hPa
FRXM3 49 mi52 min 60°F 32°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, CT13 mi44 minWSW 1410.00 miFair57°F33°F41%1008.3 hPa
Willimantic, Windham Airport, CT17 mi48 minVar 6 G 1510.00 miPartly Cloudy64°F30°F28%1007.8 hPa
Westerly, Westerly State Airport, RI19 mi47 minSSW 1010.00 miFair61°F32°F34%1008.9 hPa
Chester, Chester Airport, CT24 mi45 minSW 1310.00 miFair0°F0°F%1008.5 hPa

Link to 5 minute data for KGON

Wind History from GON (wind in knots)
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Last 24hrW13SW10SW7SW10W8W9W5CalmW4NW8NW8NW7NW5NW8NW7W6W11W11W11SW14
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1 day agoS10S11S10S10S7S4CalmCalmCalmCalmCalmCalmNE3N4NW7N10N11N9N10--SW12SW12SW13W11
2 days agoNE10
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Tide / Current Tables for Norwich, Connecticut
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Norwich
Click for Map
Tue -- 03:58 AM EDT     -0.49 feet Low Tide
Tue -- 06:20 AM EDT     Sunrise
Tue -- 06:25 AM EDT     Moonset
Tue -- 09:41 AM EDT     3.69 feet High Tide
Tue -- 04:16 PM EDT     -0.39 feet Low Tide
Tue -- 06:57 PM EDT     Moonrise
Tue -- 07:20 PM EDT     Sunset
Tue -- 10:02 PM EDT     4.08 feet High Tide
Tue -- 10:35 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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2.21.30.5-0.2-0.5-0.10.9233.63.73.32.51.60.80.1-0.4-0.20.71.933.84.13.8

Tide / Current Tables for The Race, Long Island Sound, New York Current
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The Race
Click for Map
Tue -- 02:19 AM EDT     -4.09 knots Max Ebb
Tue -- 05:32 AM EDT     0.00 knots Slack
Tue -- 06:20 AM EDT     Sunrise
Tue -- 06:25 AM EDT     Moonset
Tue -- 08:26 AM EDT     3.72 knots Max Flood
Tue -- 11:40 AM EDT     -0.00 knots Slack
Tue -- 02:43 PM EDT     -4.05 knots Max Ebb
Tue -- 05:51 PM EDT     0.00 knots Slack
Tue -- 06:57 PM EDT     Moonrise
Tue -- 07:20 PM EDT     Sunset
Tue -- 08:47 PM EDT     3.91 knots Max Flood
Tue -- 10:35 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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-1.5-3.1-4-3.9-2.7-10.92.63.63.62.71.2-0.6-2.5-3.8-4-3.2-1.60.32.23.63.93.21.9

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.
Link to Loop

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.