559 FXUS61 KOKX 091937 AFDOKXArea Forecast Discussion National Weather Service New York NY 337 PM EDT Thu Oct 9 2025
.SYNOPSIS... High pressure continues to build in today and then will remain over the area into the start of the weekend. Low pressure will deepen and track north towards the region on Sunday. The low will then meander near the region on Monday, before heading out to sea by the middle of the week.
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.NEAR TERM /UNTIL 6 AM FRIDAY MORNING/... Strong high pressure continues to build into the area from the northwest tonight, eventually moving directly overhead late tonight and into Friday morning. The gusty N wind will diminish this evening as the boundary layer decouples. Clear skies and diminishing winds will allow for some radiational cooling, especially for inland areas away from the immediate coastline. CAA from the northerly flow earlier in the day, a drier airmass, and a decoupled boundary layer will allow for surface temperatures to drop significantly bringing the potential for the first freeze of the season.
Inland areas to the north are expected to fall into the lower 30s, possibly even some upper 20s. Freeze Warnings continue for these inland areas. Closer to the coast, middle to upper 30s are possible, with the immediate coastline having low temperatures into the low to middle 40s, courtesy of ocean temperatures remaining in the 60s. Any cooler spots not along the immediate coastline may develop some frost tonight, with Frost Advisory headlines issued for portions of southern coastal Connecticut and interior portions of NE NJ. There is also a chance for some frost across the LI Pine Barrens with temperatures around 32 degrees, but not enough of the zone for any headline.
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.SHORT TERM /6 AM FRIDAY MORNING THROUGH SATURDAY NIGHT/... High pressure then remains in control of the area Friday and Saturday. Generally clear conditions Friday with a gradually shifting wind out of the southeast will allow for temperatures to climb into the lower 60s, still about 5 degrees below average. The SE component to the wind as the high pressure center shifts east of the area will allow lower level moisture to advect into the area and dew points to increase into the low 40s. Given the increase in low level moisture and potentially some cloud cover moving in Friday night, low temperatures on Friday night will be warmer than Thursday night. Lows Friday night will be in the 40s and 50s with warmer spots near the NYC metro and along the immediate coast.
High pressure remains just north of the area on Saturday with a developing coastal low approaching the area from the south. This will allow for increased cloud cover and a gradually increasing SE/E flow through the day. Highs Saturday will be in the middle to upper 60s to near 70. Some showers may approach the area from the south toward late afternoon.
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.LONG TERM /SUNDAY THROUGH THURSDAY/... The main focus continues to be on the storm for Sun into early next week, with significant cstl impacts possible.
The models continue to support low pres deepening and tracking nwd towards the region on Sun, while high pres remains over ern Canada. Although there are some timing, track, and strength challenges, this pattern lends confidence to the wind field due to the relative positions of the high and low. As a result, issued high wind and cstl flood watches for the area.
The strongest winds are still expected to be across srn/ern portions of the cwa and this is where the watch has been issued. Other areas will still be windy, but likely advy lvls or lower attm. If the storm track trends wwd, this would expand the wind field wwd as well, but may limit peak gusts if the low ends up weaker. Will continue to fcst a max gust to around 60 mph during the peak of the storm based on 50kt bl winds in the GFS. This signal has been persistent.
Did make some changes to the NBM, blending in the higher 06Z CONSALL for winds Sat ngt thru Mon over land, and manually increasing gusts there abv the NBM as well.
The rain develops from S to N on Sun. The NAM however is completely dry until eve. Stuck with the NBM which is closer to the faster GFS as it is a bit too far out to have confidence in the slower NAM. Right now the window for the heaviest rain looks to be Sun aftn and eve, although this could change due to the eventual track, timing, and intensity of the sys.
It remains windy on Mon, but the gradient relaxes so peak gusts are not expected to be as high. Still gusts around 40 mph very possible. If the low gets close enough, lighter winds could be possible with the strongest flow generally on the periphery of an occluded low. The GFS is starting to suggest this possibility, but the ECMWF has come in solidly S, keeping the area in a strong E/NE flow.
The storm weakens and pulls away on Tue, so lessening rain chances and decreasing winds, although probably still breezy at the coasts.
No changes to the NBM Wed and Thu.
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.AVIATION /19Z THURSDAY THROUGH TUESDAY/... VFR as high pressure settles across the area through the period.
N winds diminish slightly over the next couple of hours, and then become N-NNE less than 10 kt towards and just after sunset. Winds diminish a bit more overnight, closer to 5 kt or less at outlying terminals. Winds will then become E towards late morning at many terminals, then mainly SE Friday afternoon.
...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty...
No unscheduled AMD expected.
.OUTLOOK FOR 18Z FRIDAY THROUGH TUESDAY...
Friday afternoon through Saturday: VFR.
Saturday night: Chance of rain. NE winds G20kt late.
Sunday and Monday: Rain likely. MVFR cond expected, IFR cond possible in bands of heavier rain. NE winds G40kt at KISP, G30-35kt at the NYC metro/CT terminals, G25-30kt at KSWF.
Tuesday: Sub VFR to start with a chance of showers, possibly improving to VFR during the afternoon. N to NNE winds sustained at 10-15 kt, G20-25kt.
Detailed information, including hourly TAF wind component forecasts, can be found at: https:/www.weather.gov/zny/n90
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.MARINE... Winds and seas continue to subside tonight as high pressure moves overhead. Sub-SCA conditions are expected through Saturday afternoon.
Winds increase Sat ngt, particularly on the ocean, ahead of developing low pres. A gale watch has been issued for the ocean. Winds increase to possibly storm force for Sun and Sun ngt. A storm watch has been issued for all waters except the harbor, where a gale watch was issued. All areas should be close to gale on Mon. Seas likely to peak around 20ft on the ocean with the sys. Winds and seas subside further Mon ngt and Tue as the low weakens and begins to track away from the region.
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.HYDROLOGY... Widespread rain is expected Sunday into Monday. Average amounts of 1 to 2 inches are possible. However, no significant hydrologic impacts are expected with this being a long duration rainfall and recent dry conditions.
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.TIDES/COASTAL FLOODING... Total water levels are expected to approach and possibly just meet minor coastal flood benchmarks Friday morning`s high tide cycle for the Nassau County south shore bays and S Fairfield. Impacts should be minimal.
The potential remains for widespread moderate to locally major coastal flooding and beach erosion Sunday and Monday, via the combo of high astronomical tides and surge generated by strong NE flow. Breaking waves around 10 ft possible based on 20+ ft seas offshore. Although exact impacts will be dependent on the eventual track and intensity of a deep low tracking toward the region, confidence in the event was high enough to warrant the issuance of a watch for the entire coast.
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.OKX WATCHES/WARNINGS/ADVISORIES... CT...Freeze Warning from midnight tonight to 9 AM EDT Friday for CTZ005>008. Coastal Flood Watch from Sunday morning through Monday afternoon for CTZ009>012. Frost Advisory from midnight tonight to 9 AM EDT Friday for CTZ010>012. NY...Freeze Warning from midnight tonight to 9 AM EDT Friday for NYZ067>070. Coastal Flood Watch from Sunday morning through Monday afternoon for NYZ071>075-078>081-176>179. High Wind Watch from Sunday afternoon through late Sunday night for NYZ075-078>081-176>179. NJ...Freeze Warning from midnight tonight to 9 AM EDT Friday for NJZ002. Coastal Flood Watch from Sunday morning through Monday afternoon for NJZ006-106-108. Frost Advisory from midnight tonight to 9 AM EDT Friday for NJZ004-103. MARINE...Storm Watch from Sunday morning through late Sunday night for ANZ331-332-335-340-345-350-353-355. Gale Watch from Sunday morning through Monday afternoon for ANZ338. Gale Watch from Saturday evening through late Saturday night for ANZ350-353-355.
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SYNOPSIS...JMC/MW NEAR TERM...MW SHORT TERM...MW LONG TERM...JMC AVIATION...JE MARINE...JMC/MW HYDROLOGY...JMC/MW TIDES/COASTAL FLOODING...
NWS okx Office Area Forecast Discussion