Area Forecast Discussion
Issued by NWS Upton, NY
Issued by NWS Upton, NY
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786 FXUS61 KOKX 040638 AFDOKX Area Forecast Discussion National Weather Service New York NY 238 AM EDT Sun Oct 4 2026 .WHAT HAS CHANGED... No significant changes. && .KEY MESSAGES... 1) No significant impacts expected from possible showers this afternoon and evening. 2) Dry thereafter with coolest conditions Tuesday into Wednesday. && .DISCUSSION... .KEY MESSAGE 1... High pressure will shift into the Canadian Maritimes today. An amplified upper trough will dig down into the Great Lakes region, sending a cold front towards the area. The upper trough and its associated shortwave energy will interact with the coastal front/baroclinic zone just south of the area to develop a weak wave of low pressure this afternoon into tonight. The low should develop a few showers across the area, mainly in the afternoon and evening. There is some concern that lingering surface ridging/dry air may limit shower development, especially inland. The greatest likelihood of showers is close to the coast with chance PoPs farther inland. Rainfall amounts will be light with generally a few hundredths of an inch inland to a tenth or two of an inch closer to the coast. There are no flooding impacts expected. .KEY MESSAGE 2... High pressure dominates the weather pattern through the rest of the forecast period with dry weather expected. Monday may be a bit breezy as the high builds into the area and temperatures should end up close to normal. The coolest airmass of this fall will advect into the area Monday night into Tuesday and then remain in place into Wednesday. Lows Monday night will fall into the 40s for the most part with the coolest readings well inland. The NYC metro may remain right around 50. The coldest night may end up being Tuesday night as high pressure settles overhead. Interior locations could fall into the mid/upper 30s, especially if skies remain clear and winds light. It`s still a few days out, but would need to watch for frost potential in these areas. Temperatures will moderate closer to normal Thursday and Friday. && .AVIATION /06Z SUNDAY THROUGH THURSDAY/... High pressure will will retreat to the northeast today, while weak low pressure passes to the south and east this afternoon into tonight. E/NE winds increase to around 10 kt toward daybreak at the coastal terminals, but will be a bit weaker at the inland terminals. Winds will then become primarily E before backing to the NE toward evening, eventually more northerly tonight as low pressure passes to the east. MVFR ceilings likely develop at the coastal terminals in the afternoon with light rain. KHPN and KSWF may be more marginal with low end VFR or high end MVFR ceilings. While the CT coastal terminals are forecast to drop to MVFR, confidence is lower being a bit farther north of the low track. Low confidence for IFR conditions at the coastal terminals Sunday evening. Visibilities during the rain may briefly lower to MVFR. ...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty... It is possible some light rain with MVFR cigs could arrive at the NYC metros as early as 16Z, thus some amendments possible towards the afternoon. .OUTLOOK FOR 06Z MONDAY THROUGH THURSDAY... Late Sunday night: Improving to VFR. Monday: VFR. NW winds 10-15G20-25kt in the afternoon and evening. Tuesday: VFR. NW winds G15-20kt mainly E of KBDR/KISP. Wednesday and Thursday: VFR. Detailed information, including hourly TAF wind component forecasts, can be found at: https:/www.weather.gov/zny/n90 && .MARINE... Easterly winds will likely be strongest today early in the day before weakening slowly tonight and backing more NE to N. There could be some gusts to 25 kt on the ocean waters and seas up to 5 ft at times this morning, but thinking is that it won`t be enough to warrant a SCA here. A better chance of advisory conditions will be Monday afternoon into Monday night behind the passage of a cold front. Still thinking that advisory conditions likely meet advisory thresholds over most of the waters, but models have trended a little weaker with winds over past couple of days. With this in consideration, plus it being a late 3rd period start, have collaborated with WFO BOX to hold off on the SCA issuance for now. Winds should subside Tuesday morning, leading to relatively tranquil conditions through Thursday. && .OKX WATCHES/WARNINGS/ADVISORIES... CT...None. NY...None. NJ...None. MARINE...None. && $$ DISCUSSION...JC AVIATION...DW MARINE...JC