Marine Weather and Tide Forecast for Groton Long Point, CT
May 5, 2024 11:00 PM EDT (03:00 UTC) Change Location
 | Sunrise 5:38 AM Sunset 7:51 PM Moonrise 4:13 AM Moonset 5:06 PM |
ANZ332 Long Island Sound East Of The Mouth Of The Connecticut River- 1050 Pm Edt Sun May 5 2024
Tonight - SE winds 5 to 10 kt, becoming S late. Seas around 2 ft. Wave detail: se 2 ft at 4 seconds. Showers.
Mon - SW winds 5 to 10 kt. Seas around 2 ft. Wave detail: sw 1 ft at 2 seconds and se 1 ft at 5 seconds. Showers likely, mainly in the morning.
Mon night - SW winds 5 to 10 kt, becoming W after midnight. Seas around 2 ft. Wave detail: sw 1 ft at 2 seconds. Slight chance of showers.
Tue - NE winds around 5 kt, becoming S in the afternoon. Seas 1 ft or less, then around 2 ft in the afternoon. Wave detail: E 1 ft at 10 seconds, becoming S 1 ft at 2 seconds and E 1 ft at 10 seconds.
Tue night - S winds 5 to 10 kt. Seas around 2 ft. Wave detail: S 1 ft at 2 seconds and E 1 ft at 10 seconds. Chance of showers after midnight.
Wed - S winds 5 to 10 kt. Seas around 2 ft. Wave detail: S 1 ft at 2 seconds. Chance of showers.
Wed night - NW winds 5 to 10 kt, becoming ne after midnight. Seas around 2 ft in the evening, then 1 ft or less. Chance of showers in the evening.
Thu - E winds 10 to 15 kt with gusts up to 20 kt. Seas around 2 ft. Showers likely with scattered tstms.
Thu night - E winds 10 to 15 kt with gusts up to 20 kt. Seas 2 to 3 ft. Showers likely with scattered tstms.
Fri - E winds 10 to 15 kt. Seas 2 to 3 ft. Chance of showers.
Fri night - NE winds around 10 kt. Seas 2 to 3 ft. Chance of showers.
winds and seas may be higher in and near tstms.
winds and seas may be higher in and near tstms.
ANZ300 1050 Pm Edt Sun May 5 2024
Synopsis for the long island and connecticut coastal waters - High pressure centered near nova scotia and extending along the new england coast continues to weakens and slowly shift to the east through tonight ahead of an approaching cold front from the west. The front eventually tracks through the region late Monday into Monday night before stalling to our south. High pressure then briefly returns before the stalled boundary lifts back north as a warm front Tuesday night. A series of low pressure centers then impact the weather from Wednesday through Saturday.
Area Discussion for - New York City/Upton, NY
HIDE HelpNOTE: mouseover dotted underlined text for definition
FXUS61 KOKX 060248 AFDOKX
Area Forecast Discussion National Weather Service New York NY 1048 PM EDT Sun May 5 2024
SYNOPSIS
High pressure centered near Nova Scotia and extending along the New England coast continues to weakens and slowly shift to the east through tonight ahead of an approaching cold front from the west. The front eventually tracks through the region late Monday into Monday night before stalling to our south. High pressure then briefly returns before the stalled boundary lifts back north as a warm front Tuesday night. A series of low pressure centers then impact the weather from Wednesday through Saturday.
NEAR TERM /UNTIL 6 AM MONDAY MORNING/
Forecast remains on track with no significant changes.
An upper level ridge offshore continues to move into the Western Atlantic tonight as a shortwave tracks through the northeast, with the flow becoming more zonal across the region. Light rain showers will accompany the shortwave. At the low levels weak warm advection will be setting up late tonight. And while temperature may fall a couple of degrees into tonight, temperatures will be mainly steady with the cloud cover and precipitation. And then as the warm advection begins temperatures will hold nearly steady or rise a degree or two toward Monday morning. The CAMs handle the areal extent and timing of the precipitation and leaned toward those probabilities. And with the shortwave moving east precipitation will be tapering off and ending across much of the areas by Monday morning. While some fog is possible tonight with saturated low levels, and onshore flow, do not think that visibilities will lower much below 3 miles to include in the forecast at this time.
SHORT TERM /6 AM MONDAY MORNING THROUGH TUESDAY/
A closed upper low will track through eastern Canada Monday into Monday night, and with the flow more zonal a weak cold front will be approaching during the day. While the flow is more progressive the latest trends have been to move the front through a little slower than previous forecasts. Continuing warm advection ahead of the cold front, and possibly some breaks in the cloud cover will allow for temperatures to rise into the lower 70s across much of the region with coastal areas remaining in the mid to upper 60s. While the NBM temperatures were several degrees higher than the MOS guidance, with the cloud cover have used a blend of the NBM with the MOS to have temperatures several degrees cooler. However, if there are more breaks in the cloud cover than temperatures inland may rise into the mid and upper 70s. Have also included the chance of isolated thunderstorms as surface based CAPE increases to few hundred J/kg and instability also increases. In addition the CAMs are showing a developing line of convection ahead of the cold front during the later half of the afternoon and into the early evening. The front does move through the region Monday night, and with the zonal flow stall south of the region.
LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/
High pressure briefly noses in on Tuesday with a weakening ridge aloft before a stalled front to our south slowly lifts north as a warm front Tuesday night. Weak low pressure from the Great Lakes moves into the northeast on Wednesday in tandem with a mid-level shortwave helping the warm front advance through the area. This will also advect in more moisture with models indicating 1.25-1.45" PWATs. 850mb warm air advection will help increase instability and drive better development of showers and thunderstorms. Temperatures on this day will be quite warm into the low-80s for NE NJ, and parts of the Lower Hudson Valley and the NYC metro and in the low-70s for eastern areas. Model sounding show decent shear, increasing CAPE aloft with many areas 1000 J/kg or greater, decent speed shear and increasing midlevel lapse rates. Gusty winds and small hail, therefore, may be possible with some thunderstorms. When this timeframe falls within the CAMs, we'll have a better idea of how great and exactly where in the CWA this risk will be.
A cold front will then pass through Wednesday night as the low exits to our east. High pressure will settle in again, briefly, with more of a zonal pattern aloft.
Another low pressure system approaches from the Ohio River Valley on Thursday, passing through on Friday as the upper-level trough starts to deepen over the region. Increased mid-level energy will arrive ahead of the low early Thursday. PWATs again increase ahead of the low around 1.3-1.5" based on the latest 12Z model guidance. Showers and thunderstorms will be likely for this. They are less likely to be as intense due to cooler air in the region.
A new low pressure system will develop to our south and east Saturday into Sunday as a larger troughing pattern aloft takes shape, leading to cooler temperatures settling in.
AVIATION /03Z MONDAY THROUGH FRIDAY/
A frontal system slowly approaches from the west tonight.
IFR cigs remain tonight and linger through Monday morning.
Localized LIFR is possible through the night. There may be an improvement to MVFR after mid-day but it's very possible most terminals remain IFR much of the day. If improvements in cigs occur, there may be some locations, especially western terminals that improve to VFR.
SHRA continue tonight before gradually becoming less likely after 6-8Z. Additional showers and possibly even an isolated TSRA area possible Monday late afternoon and evening, but too uncertain and low confidence to include the mentioning of TS in the TAFs at this time.
ESE-SE winds less than 10 kt possibly becoming light and variable overnight at some terminals. Winds shift more southerly into early Monday morning and remain southerly through the day.
NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty...
Amendments likely due to timing of the changing of flight categories.
OUTLOOK FOR 00Z TUESDAY THROUGH FRIDAY...
Monday night: IFR to MVFR. A slight chance of showers, an isolated thunderstorm possible.
Tuesday: VFR, becoming MVFR to IFR late at night.
Wednesday: MVFR or lower with a chance of showers. Thunderstorms possible mainly in the afternoon.
Thursday through Friday: Mainly MVFR. Showers likely, mainly in the afternoon.
Detailed information, including hourly TAF wind component forecasts, can be found at: https:/ www.weather.gov/zny/n90
MARINE
Winds and seas are expected to remain below SCA conditions through Thursday, but ocean seas may rise to 5 ft Thursday night.
HYDROLOGY
There are currently no hydrologic concerns through this week.
TIDES/COASTAL FLOODING
Astronomical tides are running high with the approach of a new moon Tuesday. Tide levels fell short of Stevens Institute NYHOPS guidance with the Saturday night high tide cycle, and most locations fall short of the minor flooding thresholds for the high tide cycle tonight. At most isolated spots over Southern Fairfield County may touch minor flooding thresholds.
Statements will be possible for Monday night's cycle for Southern Fairfield county, as well as for the south shore back bays of Nassau County.
The potential of a more widespread minor flooding event that would necessitate advisories will probably hold off until Tuesday and Wednesday nights' cycles for these same areas as well as southern Queens. Statements for these 2 high tide cycles may be needed for other parts along western LI Sound as well as lower NY Harbor and Brooklyn.
OKX WATCHES/WARNINGS/ADVISORIES
CT...None.
NY...None.
NJ...None.
MARINE...None.
Area Forecast Discussion National Weather Service New York NY 1048 PM EDT Sun May 5 2024
SYNOPSIS
High pressure centered near Nova Scotia and extending along the New England coast continues to weakens and slowly shift to the east through tonight ahead of an approaching cold front from the west. The front eventually tracks through the region late Monday into Monday night before stalling to our south. High pressure then briefly returns before the stalled boundary lifts back north as a warm front Tuesday night. A series of low pressure centers then impact the weather from Wednesday through Saturday.
NEAR TERM /UNTIL 6 AM MONDAY MORNING/
Forecast remains on track with no significant changes.
An upper level ridge offshore continues to move into the Western Atlantic tonight as a shortwave tracks through the northeast, with the flow becoming more zonal across the region. Light rain showers will accompany the shortwave. At the low levels weak warm advection will be setting up late tonight. And while temperature may fall a couple of degrees into tonight, temperatures will be mainly steady with the cloud cover and precipitation. And then as the warm advection begins temperatures will hold nearly steady or rise a degree or two toward Monday morning. The CAMs handle the areal extent and timing of the precipitation and leaned toward those probabilities. And with the shortwave moving east precipitation will be tapering off and ending across much of the areas by Monday morning. While some fog is possible tonight with saturated low levels, and onshore flow, do not think that visibilities will lower much below 3 miles to include in the forecast at this time.
SHORT TERM /6 AM MONDAY MORNING THROUGH TUESDAY/
A closed upper low will track through eastern Canada Monday into Monday night, and with the flow more zonal a weak cold front will be approaching during the day. While the flow is more progressive the latest trends have been to move the front through a little slower than previous forecasts. Continuing warm advection ahead of the cold front, and possibly some breaks in the cloud cover will allow for temperatures to rise into the lower 70s across much of the region with coastal areas remaining in the mid to upper 60s. While the NBM temperatures were several degrees higher than the MOS guidance, with the cloud cover have used a blend of the NBM with the MOS to have temperatures several degrees cooler. However, if there are more breaks in the cloud cover than temperatures inland may rise into the mid and upper 70s. Have also included the chance of isolated thunderstorms as surface based CAPE increases to few hundred J/kg and instability also increases. In addition the CAMs are showing a developing line of convection ahead of the cold front during the later half of the afternoon and into the early evening. The front does move through the region Monday night, and with the zonal flow stall south of the region.
LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/
High pressure briefly noses in on Tuesday with a weakening ridge aloft before a stalled front to our south slowly lifts north as a warm front Tuesday night. Weak low pressure from the Great Lakes moves into the northeast on Wednesday in tandem with a mid-level shortwave helping the warm front advance through the area. This will also advect in more moisture with models indicating 1.25-1.45" PWATs. 850mb warm air advection will help increase instability and drive better development of showers and thunderstorms. Temperatures on this day will be quite warm into the low-80s for NE NJ, and parts of the Lower Hudson Valley and the NYC metro and in the low-70s for eastern areas. Model sounding show decent shear, increasing CAPE aloft with many areas 1000 J/kg or greater, decent speed shear and increasing midlevel lapse rates. Gusty winds and small hail, therefore, may be possible with some thunderstorms. When this timeframe falls within the CAMs, we'll have a better idea of how great and exactly where in the CWA this risk will be.
A cold front will then pass through Wednesday night as the low exits to our east. High pressure will settle in again, briefly, with more of a zonal pattern aloft.
Another low pressure system approaches from the Ohio River Valley on Thursday, passing through on Friday as the upper-level trough starts to deepen over the region. Increased mid-level energy will arrive ahead of the low early Thursday. PWATs again increase ahead of the low around 1.3-1.5" based on the latest 12Z model guidance. Showers and thunderstorms will be likely for this. They are less likely to be as intense due to cooler air in the region.
A new low pressure system will develop to our south and east Saturday into Sunday as a larger troughing pattern aloft takes shape, leading to cooler temperatures settling in.
AVIATION /03Z MONDAY THROUGH FRIDAY/
A frontal system slowly approaches from the west tonight.
IFR cigs remain tonight and linger through Monday morning.
Localized LIFR is possible through the night. There may be an improvement to MVFR after mid-day but it's very possible most terminals remain IFR much of the day. If improvements in cigs occur, there may be some locations, especially western terminals that improve to VFR.
SHRA continue tonight before gradually becoming less likely after 6-8Z. Additional showers and possibly even an isolated TSRA area possible Monday late afternoon and evening, but too uncertain and low confidence to include the mentioning of TS in the TAFs at this time.
ESE-SE winds less than 10 kt possibly becoming light and variable overnight at some terminals. Winds shift more southerly into early Monday morning and remain southerly through the day.
NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty...
Amendments likely due to timing of the changing of flight categories.
OUTLOOK FOR 00Z TUESDAY THROUGH FRIDAY...
Monday night: IFR to MVFR. A slight chance of showers, an isolated thunderstorm possible.
Tuesday: VFR, becoming MVFR to IFR late at night.
Wednesday: MVFR or lower with a chance of showers. Thunderstorms possible mainly in the afternoon.
Thursday through Friday: Mainly MVFR. Showers likely, mainly in the afternoon.
Detailed information, including hourly TAF wind component forecasts, can be found at: https:/ www.weather.gov/zny/n90
MARINE
Winds and seas are expected to remain below SCA conditions through Thursday, but ocean seas may rise to 5 ft Thursday night.
HYDROLOGY
There are currently no hydrologic concerns through this week.
TIDES/COASTAL FLOODING
Astronomical tides are running high with the approach of a new moon Tuesday. Tide levels fell short of Stevens Institute NYHOPS guidance with the Saturday night high tide cycle, and most locations fall short of the minor flooding thresholds for the high tide cycle tonight. At most isolated spots over Southern Fairfield County may touch minor flooding thresholds.
Statements will be possible for Monday night's cycle for Southern Fairfield county, as well as for the south shore back bays of Nassau County.
The potential of a more widespread minor flooding event that would necessitate advisories will probably hold off until Tuesday and Wednesday nights' cycles for these same areas as well as southern Queens. Statements for these 2 high tide cycles may be needed for other parts along western LI Sound as well as lower NY Harbor and Brooklyn.
OKX WATCHES/WARNINGS/ADVISORIES
CT...None.
NY...None.
NJ...None.
MARINE...None.
| Stations | Dist | Age | Wind | Air Temp | Water Temp | Waves | inHg | DewPt |
| NLHC3 | 8 mi | 43 min | 48°F | 55°F | 30.17 | |||
| MTKN6 - 8510560 - Montauk, NY | 17 mi | 43 min | 49°F | 48°F | 30.11 | |||
| QPTR1 - 8454049 - Quonset Point, RI | 37 mi | 43 min | S 9.9G | 49°F | 30.19 | |||
| NWPR1 - 8452660 - Newport, RI | 38 mi | 43 min | SSE 6G | 48°F | 51°F | 30.19 | ||
| PDVR1 | 38 mi | 43 min | SSE 8.9G | 49°F | 30.17 | 48°F | ||
| NAXR1 - Narragansett Bay Reserve, RI | 42 mi | 76 min | W 2.9 | 48°F | 30.21 | 48°F | ||
| PRUR1 | 42 mi | 43 min | 49°F | 48°F | ||||
| PTCR1 - 8452951 - Potter Cove, Prudence Island, RI | 42 mi | 43 min | SSW 1.9G | 48°F | 30.21 | |||
| CPTR1 - 8452944 - Conimicut Light, RI | 45 mi | 43 min | SSE 11G | 48°F | 53°F | 30.19 | ||
| FOXR1 - 8454000 - Providence, RI | 47 mi | 43 min | SSE 7G | 49°F | 50°F | 30.18 | ||
| PVDR1 | 47 mi | 43 min | S 12G | 50°F | 30.19 | 49°F | ||
| NWHC3 - 8465705 - New Haven, CT | 49 mi | 43 min | SE 4.1G | 50°F | 54°F | 30.17 |
toggle option: (graph/table)
No data
| Airport | Dist | Age | Wind kt | Vis | Sky | Weather | Temp | DewPt | RH | inHg |
| KGON GROTONNEW LONDON,CT | 4 sm | 64 min | SE 05 | 5 sm | Overcast | Lt Rain Mist | 48°F | 48°F | 100% | 30.19 |
| KWST WESTERLY STATE,RI | 11 sm | 20 min | ESE 04 | 1/2 sm | Overcast | Lt Rain Mist | 48°F | 46°F | 93% | 30.17 |
| KMTP MONTAUK,NY | 16 sm | 66 min | var 05 | -- | 52°F | 48°F | 87% | 30.19 | ||
| KBID BLOCK ISLAND STATE,RI | 24 sm | 64 min | SSE 12 | 9 sm | Overcast | Lt Rain | 46°F | 46°F | 100% | 30.19 |
Noank
Click for Map
Sun -- 01:42 AM EDT -0.03 feet Low Tide
Sun -- 04:13 AM EDT Moonrise
Sun -- 05:39 AM EDT Sunrise
Sun -- 07:22 AM EDT 2.51 feet High Tide
Sun -- 01:52 PM EDT 0.05 feet Low Tide
Sun -- 05:05 PM EDT Moonset
Sun -- 07:43 PM EDT 3.10 feet High Tide
Sun -- 07:50 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sun -- 01:42 AM EDT -0.03 feet Low Tide
Sun -- 04:13 AM EDT Moonrise
Sun -- 05:39 AM EDT Sunrise
Sun -- 07:22 AM EDT 2.51 feet High Tide
Sun -- 01:52 PM EDT 0.05 feet Low Tide
Sun -- 05:05 PM EDT Moonset
Sun -- 07:43 PM EDT 3.10 feet High Tide
Sun -- 07:50 PM EDT Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Noank, Mystic River entrance, Connecticut, Tide feet
| 12 am |
| 0.5 |
| 1 am |
| 0.1 |
| 2 am |
| -0 |
| 3 am |
| 0.4 |
| 4 am |
| 1 |
| 5 am |
| 1.7 |
| 6 am |
| 2.2 |
| 7 am |
| 2.5 |
| 8 am |
| 2.4 |
| 9 am |
| 2.1 |
| 10 am |
| 1.7 |
| 11 am |
| 1.1 |
| 12 pm |
| 0.6 |
| 1 pm |
| 0.2 |
| 2 pm |
| 0.1 |
| 3 pm |
| 0.4 |
| 4 pm |
| 1.1 |
| 5 pm |
| 1.9 |
| 6 pm |
| 2.5 |
| 7 pm |
| 3 |
| 8 pm |
| 3.1 |
| 9 pm |
| 2.8 |
| 10 pm |
| 2.3 |
| 11 pm |
| 1.6 |
Tide / Current for The Race, Long Island Sound, New York Current (2) (expired 1993-12-31)
EDIT HIDE HelpThe Race
Click for Map
Sun -- 12:46 AM EDT -4.22 knots Max Ebb
Sun -- 04:02 AM EDT 0.01 knots Slack
Sun -- 04:14 AM EDT Moonrise
Sun -- 05:40 AM EDT Sunrise
Sun -- 06:50 AM EDT 3.56 knots Max Flood
Sun -- 09:52 AM EDT -0.01 knots Slack
Sun -- 01:11 PM EDT -3.97 knots Max Ebb
Sun -- 04:16 PM EDT 0.00 knots Slack
Sun -- 05:06 PM EDT Moonset
Sun -- 07:09 PM EDT 3.85 knots Max Flood
Sun -- 07:50 PM EDT Sunset
Sun -- 10:13 PM EDT -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
Click for Map
Sun -- 12:46 AM EDT -4.22 knots Max Ebb
Sun -- 04:02 AM EDT 0.01 knots Slack
Sun -- 04:14 AM EDT Moonrise
Sun -- 05:40 AM EDT Sunrise
Sun -- 06:50 AM EDT 3.56 knots Max Flood
Sun -- 09:52 AM EDT -0.01 knots Slack
Sun -- 01:11 PM EDT -3.97 knots Max Ebb
Sun -- 04:16 PM EDT 0.00 knots Slack
Sun -- 05:06 PM EDT Moonset
Sun -- 07:09 PM EDT 3.85 knots Max Flood
Sun -- 07:50 PM EDT Sunset
Sun -- 10:13 PM EDT -0.01 knots Slack
Tide / Current data from XTide NOT FOR NAVIGATION
The Race, Long Island Sound, New York Current (2) (expired 1993-12-31), knots
| 12 am |
| -3.9 |
| 1 am |
| -4.2 |
| 2 am |
| -3.4 |
| 3 am |
| -1.9 |
| 4 am |
| -0.1 |
| 5 am |
| 1.8 |
| 6 am |
| 3.2 |
| 7 am |
| 3.5 |
| 8 am |
| 3 |
| 9 am |
| 1.7 |
| 10 am |
| -0.3 |
| 11 am |
| -2 |
| 12 pm |
| -3.3 |
| 1 pm |
| -4 |
| 2 pm |
| -3.6 |
| 3 pm |
| -2.3 |
| 4 pm |
| -0.5 |
| 5 pm |
| 1.4 |
| 6 pm |
| 3.1 |
| 7 pm |
| 3.8 |
| 8 pm |
| 3.5 |
| 9 pm |
| 2.4 |
| 10 pm |
| 0.5 |
| 11 pm |
| -1.6 |
Boston, MA,
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