


Area Forecast Discussion
Issued by NWS Upton, NY
Issued by NWS Upton, NY
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926 FXUS61 KOKX 300002 AFDOKX Area Forecast Discussion National Weather Service New York NY 802 PM EDT Fri Aug 29 2025 .SYNOPSIS... A cold front shifts offshore this evening. High pressure then follows for the weekend and remains in control through the middle of next week. A frontal system then approaches to end the week. && .NEAR TERM /UNTIL 6 AM SATURDAY MORNING/... Broken line of thunderstorms along pre-frontal trough has pushed east of Long Island this evening, with cold front pushing from near NYC and NY/CT border eastward through 06z. Dwindling instability and moisture for the front to work with, so mainly some iso-sct shower activity from w to e through around midnight. Briefly gusty NW winds overnight as cooler/drier airmass advects in. NBM looked good for overnight low temperatures with 50s in most places and mid to upper 40s well NW of the city. && .SHORT TERM /6 AM SATURDAY MORNING THROUGH SUNDAY NIGHT/... A large area of high pressure expands from the upper Mississippi Valley to the Mid Atlantic and Northeast. Mainly clear skies and low humidity will be accompanied by high temperatures around 5 degrees below normal on Saturday and a little warmer on Sunday. NBM was followed for daytime highs, with lows weighted toward a MAV/MET MOS blend across the cooler Pine Barrens region of LI and well inland to better capture radiational cooling. && .LONG TERM /MONDAY THROUGH FRIDAY/... Key Points: * High pressure will remain over the region Monday through Wednesday, with dry and cool conditions. Temperatures will be more like mid-September. * Chance for precipitation returns on Thursday and Friday as an upper level trough and associated cold front approach and move into the region. With high pressure remaining entrenched over the region Monday through Wednesday dry and cool weather is expected. The high moves off the New England and Mid Atlantic coast Wednesday night into Thursday as a cold front slowly approaches, with the associated weak low tracking slowly through the Great Lakes region, and an inverted trough along the eastern seaboard. Timing of the front is a little delayed and moves slowly across the region into Friday, as a shortwave rotates into the longwave trough and become closed. The upper low and surface cold front may lingering into the beginning of next weekend as an amplified ridge remains across the Western Atlantic. Only changes to the NBM was for cooler overnight lows Monday night through Wednesday night, especially across the normally cooler locations of the interior, and the Pine Barrens of eastern Long Island, with nearly clear skies and light winds each night. For the lows used a blend of the deterministic and 25th percentile, which gives lows closer to MOS guidance. && .AVIATION /23Z FRIDAY THROUGH WEDNESDAY/... A cold front passes east of the terminals by around midnight. High pressure then builds to the southwest of the terminals through Saturday, and into the region thru Sunday. VFR, outside of a brief and isolated shower for NYC and eastern terminals through 06z. Sct-Bkn cigs develop around 5kft Sat aft. NW winds develop across all terminals btwn 00z and 03z. Gusts to 20 kt possible btwn 01z and 06z for NYC/NJ metro terminals. NW winds btwn 8-12 kt on Saturday, with gusts to mid/upper teens possible from late morning into afternoon. ...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty... Brief and isolated shower w/MVFR conds possible through 02z. Winds mainly right of 310 mag thru the period, except may back to the left at KJFK for Sat eve push. .OUTLOOK FOR 00Z SUNDAY THROUGH WEDNESDAY... Saturday Afternoon through Wednesday: VFR. Detailed information, including hourly TAF wind component forecasts, can be found at: https:/www.weather.gov/zny/n90 && .MARINE... Gusts around 20kt still possible until a few hours after midnight with the beginnings of cold air advection. Winds and waves otherwise subside overnight and remain below advisory thresholds through the weekend. High pressure will remain across the forecast waters Monday through Wednesday. Conditions will generally remain below SCA levels during this time. However, there is a chance that ocean seas will be marginally 5 feet east of Fire Island Inlet Tuesday night into Wednesday morning with a 4 foot east to southeast swell. && .HYDROLOGY... There are no hydrologic concerns through the end of next week. && .TIDES/COASTAL FLOODING... There will be a low risk at the ocean beaches Saturday and Sunday with 1-2 ft waves at 5-7 seconds. && .OKX WATCHES/WARNINGS/ADVISORIES... CT...None. NY...None. NJ...None. MARINE...None. && $$ SYNOPSIS... NEAR TERM...NV SHORT TERM... LONG TERM... AVIATION...NV MARINE... HYDROLOGY... TIDES/COASTAL FLOODING...NV