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Marine Weather and Tides Port Jefferson, NY 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.

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Sunrise 7:12AM

Sunset 4:53PM

Saturday January 18, 2020 6:25 PM EST (23:25 UTC)

Moonrise 2:01AM

Moonset 1:08PM

Illumination 37%

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.

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7 Day Forecast for Marine Location Near Port Jefferson, NY

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Area Discussion for - New York City/Upton, NY

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FXUS61 KOKX 182054 AFDOKX

Area Forecast Discussion National Weather Service New York NY 354 PM EST Sat Jan 18 2020

SYNOPSIS. As low pressure moves across the upper Great Lakes region, a warm front will approach from the south and enter the region this evening, followed by a cold front late tonight. The low will pass east of New England on Sunday. High pressure will then slowly builds from the west through mid to late week period. A frontal system will approach next weekend.

NEAR TERM /UNTIL 6 AM SUNDAY MORNING/. A winter weather advisory remains in effect for most of the region through 1 AM Sunday.

Initial WAA snow band is moving across the forks of Long Island and into SE CT. Precip has also filling in behind this band, and so steady light to moderate snow should continue into tonight.

With a southerly onshore flow this evening, precipitation should begin to transition to a rain/snow mix and then rain. The timing of this transition may delayed via dynamic cooling, with wet bulb temperatures still below freezing along the coast at 00Z. Also, enhanced convergence/lift via a coastal LLJ could result in moderate to briefly heavy precip mainly across Long Island and CT this evening. So, still expect the transition to begin 23Z to 02Z, especially the southeastern zones, and continue this evening.

It now appears that precip could end as a -FZRA/PL mix inland, as obs over SE PA indicate freezing rain and sleet as temps around 800 mb warm above 0C, and latest RAP soundings indicate this should enter NE NJ between 23Z-00Z, and spread NE into the rest of the area through about 04Z just as mid levels start to dry out and precip begins to wind down.

Did not change snowfall amounts very much, so still looking at a general 2-4 inch snowfall closer to the coast and 3-5 inches inland, give or take an inch.

Temps overnight should rise to the lower 40s along the coast, and into the mid/upper 30s most elsewhere except in some sheltered inland valleys. Scattered snow/rain showers are possible late as a trailing cold front moves across.

SHORT TERM /6 AM SUNDAY MORNING THROUGH 6 PM SUNDAY/. Deep cyclonic flow will remain as the center of the low pulls east, and a weak trough remains back across the Hudson Valley into southern New England. Models do indicate enough moisture with the trough and have some precipitation as energy continues to rotate through the longwave upper trough. Think that a few flurries will be possible inland but will leave out the mention at this time. Temps may not change very much through the day, with highs a GFS/NAM MOS/2m temp blend, upper 30s inland and lower 40s along the coast and across much of southern CT.

LONG TERM /SUNDAY NIGHT THROUGH SATURDAY/. Canadian high pressure will build slowly, reaching the area by mid to late week. The area sits between the departing low and front, and high pressure across the mid west, resulting in a cold and gusty N/NW wind through Monday/Monday night. These chilly winds begin to abate Tuesday as the pressure gradient relaxes.

Upper northern stream trough over the northeast, with digging shortwave that rounds the base of the trough and passes well to the south by mid week. Ridge builds thereafter ahead of next trough that approaches by next weekend.

As for sensible weather, dry and cold conditions (below normal) are anticipated early in the week, with slow moderation back to above normal, with continued dry weather, by late in the week.

Temps aloft too warm for anything but rain by next Saturday. If temps are initially too cold, dependent on when precip arrives, some freezing rain is possible.

AVIATION /21Z SATURDAY THROUGH THURSDAY/. Low pressure and its associated frontal system moves across the northeast through tonight.

Initial band of snow is now moving across eastern LI and eastern CT. The next area of snow is quickly moving in from the west and should overspread the terminals through 22z. Conditions may briefly improve to VFR between snow bands, and then deteriorate to IFR and possibly LIFR conditions this evening. The snow will gradually mix with and change to rain across NYC and LI terminals 00-02z. The change to rain may also occur at HPN and coastal CT terminal, but may not happen until 02-03z. Conditions gradually improve overnight as the precipitation ends from west to east.

Winds will likely be light S-SE into the early evening under 10 kt Winds gradually shift to the SW overnight and increase. Winds will become gusty out of the W-WNW Sunday morning.

Forecast snow amounts: NYC and NE NJ terminals: 2-4 inches, LI terminals: 1-3 inches, Lower Hudson Valley terminals: 3-5 inches, Southern CT terminals: 3-5 inches.

OUTLOOK FOR 18Z SUNDAY THROUGH THURSDAY. Sunday Afternoon-Sunday Night. VFR. W-WNW gusts near 20-25kt Gusts diminish late Sunday night. Monday-Thursday. VFR.

MARINE. SCA conds in increasing S flow should begin shortly on the western ocean waters and spread to the rest of the ocean waters early this evening, and there could be a few wind gusts approaching gale force on the ocean. Elsewhere, mainly sub SCA conds tonight, though the far eastern sound/bays might gusts up to 25 kt at times.

On Sunday, expect SCA conds daytime on all waters as W-NW winds increase behind departing low pressure. Thereafter, cold gusty NW winds will persist through Monday, then abate Tuesday, with light winds expected mid week.

Initially rough seas will subside through the week.

HYDROLOGY. No hydrologic impacts are expected through Friday of next week.

EQUIPMENT. NYC NOAA Weather Radio Station KWO35 (162.55 MHz) is still operating at reduced power.

OKX WATCHES/WARNINGS/ADVISORIES. CT . Winter Weather Advisory until 1 AM EST Sunday for CTZ005>012. NY . Winter Weather Advisory until 1 AM EST Sunday for NYZ067>075- 078>080-176>179. NJ . Winter Weather Advisory until 1 AM EST Sunday for NJZ002-004- 006-103>108. MARINE . Small Craft Advisory from 7 AM to 6 PM EST Sunday for ANZ330- 335-338-340-345. Small Craft Advisory until 7 AM EST Monday for ANZ353-355. Small Craft Advisory from 7 PM this evening to 7 AM EST Monday for ANZ350.



SYNOPSIS . Goodman/PW NEAR TERM . Goodman SHORT TERM . Goodman LONG TERM . PW AVIATION . DS MARINE . Goodman/PW HYDROLOGY . Goodman/PW

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Weather Reporting Stations

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Stations	Dist	Age	Wind	Air Temp	Water Temp	Waves	Pressure	DewPt
BRHC3 - 8467150 - Bridgeport, CT	17 mi	55 min	ESE 7 G 8	26°F	40°F		1019.7 hPa
NWHC3 - 8465705 - New Haven, CT	24 mi	55 min	ESE 1.9 G 6	24°F	39°F		1019.9 hPa
44040 - Western Long Island Sound	28 mi	85 min	ESE 7.8 G 14	28°F				26°F
44022 - Execution Rocks	36 mi	55 min	ESE 3.9 G 7.8	28°F	32°F			28°F
KPTN6 - 8516945 - Kings Point, NY	39 mi	55 min	S 1.9 G 7	27°F	39°F		1020.3 hPa
44025 - LONG ISLAND 33 NM South of Islip, NY	49 mi	35 min	19 G 23	38°F	46°F	4 ft	1019.8 hPa (-5.9)

Wind History for Bridgeport, CT

(wind in knots)    EDIT      (on/off)   Help

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Last 24hr

N8 G14

N8 G11

N6 G12

NE6 G9

NW7 G11

N7 G13

N9 G13

N8 G11

NW5 G8

N4 G8

N3

N5 G9

N4

N4 G7

NE1

SE1 G4

S4

SW3

S4

SW5 G8

E5

NE6

NE2

SE9 G12

1 day ago

NW10 G19

N6 G16

N10 G13

NW13 G22

N11 G18

N11 G17

N9 G18

N11 G18

NW9 G19

N8 G13

N8 G15

N12 G22

N6 G14

N13 G26

NW11 G21

N11 G19

N13 G19

N10 G17

N13 G22

N11 G18

N10 G18

N10 G13

N6 G11

N8 G14

2 days ago

N3

N2

N2

N2

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NW3

NW3

N2

SE4

S3 G7

SE6

S5

SW8 G12

W4 G7

NW13 G19

NW8 G21

W12 G27

NW13 G23

NW12 G24

NW9 G16

NW9 G18

NW10 G19

NW9 G18

NW14 G27

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Airport Reports

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Airport	Dist	Age	Wind kt	Visibility	Sky/Weather	Temp	DewPt	Humidity	Pressure
Islip, Long Island Mac Arthur Airport, NY	11 mi	89 min	N 0	1.00 mi	Light Snow Fog/Mist	28°F	27°F	96%	1021.7 hPa
Shirley, Brookhaven Airport, NY	14 mi	89 min	N 0	1.00 mi	Light Snow Fog/Mist	30°F	27°F	88%	1022 hPa
Bridgeport, Sikorsky Memorial Airport, CT	16 mi	33 min	SE 9	1.00 mi	Light Snow Fog/Mist	30°F	28°F	92%	1019.3 hPa
The Gabreski Airport, NY	24 mi	32 min	S 8	1.50 mi	Light Snow Fog/Mist	32°F	30°F	92%	1020.5 hPa
Farmingdale - Republic Airport, NY	24 mi	32 min	S 9	1.00 mi	Light Snow Fog/Mist	32°F	28°F	85%	1019.2 hPa

Link to 5 minute data for KISP

Wind History from ISP (wind in knots)

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Last 24hr

NW16 G20

N13

N12

N11

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N6

NW6

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NE4

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N5

N6

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NE3

E5

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Calm

NE4

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S10

1 day ago

NW18 G26

NW16 G25

NW20 G33

NW17 G29

NW19 G30

NW16 G29

NW19 G30

NW17 G28

N16 G21

NW17 G30

N25 G36

N18 G24

NW17 G28

N15 G31

NW24 G31

N17 G32

N21 G29

N20 G28

N14 G25

N18 G26

N16 G27

NW17 G25

NW14 G25

N11 G19

2 days ago

Calm

Calm

Calm

E3

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S4

S9

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SE14

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SW11

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NW20 G34

W19 G28

W25 G36

NW22 G34

NW19 G29

NW23 G32

NW16 G31

NW26 G35

NW20 G31

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Tide / Current Tables for Port Jefferson, Long Island Sound, New York

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Tide / Current Tables for Stratford Shoal, Long Island Sound, New York

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Weather Map

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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

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Wind Forecast for New York City/Upton, NY (18,4,5,8)

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Ground Weather Radar Station Upton, NY

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