


Area Forecast Discussion
Issued by NWS Upton, NY
Issued by NWS Upton, NY
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998 FXUS61 KOKX 111749 AFDOKX Area Forecast Discussion National Weather Service New York NY 149 PM EDT Thu Sep 11 2025 .SYNOPSIS... High pressure will be in control through Saturday. A weak frontal system passes across the area Sunday afternoon and evening. High pressure then builds over the northeast early next week, remaining in control through late in the week. && .NEAR TERM /THROUGH TONIGHT/... High pressure builds in from Canada, pushing a weakening cold front into the region late tonight. Not enough moisture with the front for a mention of showers in the forecast, but the front probably at least brings some mid-level cloud cover. This cloud cover would then hamper fog formation, but still some patchy valley fog could manage to develop outside of any bkn-ovc cloud deck. NBM was used for low temperatures for the most part, but went closer to a MAV/MET MOS blend for the Pine Barrens region as this area could be mostly clear for most, if not all, of the night. && .SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/... High pressure stretching from the Northeast through the Mid-Altantic will be in control through the period. Seasonal high temperatures of mostly 75-80 for both days. Dry weather through at least Saturday afternoon, and likely dry for Saturday night as well. Clouds probably increase during Saturday night with a developing warm front, and at the same time, the upper flow becomes more cyclonic with the potential of some shortwave lift. Would like to see a better combination of moisture and lift to include any chance of showers for Saturday night, and NBM 6-hr PoP for this time period keeps us dry. && .LONG TERM /SUNDAY THROUGH THURSDAY/... Key Points *Mainly dry conditions are forecast Sunday through late next week. *Temperatures will be near normal to slightly above normal. The modeling has remained inconsistent with the mid and upper level pattern evolution for Sunday into early next week. 24 hours ago, the modeling was hinting at a much sharper upper trough digging over the northeast. The overall trend has been for the trough to be more progressive with the main shortwave energy passing north and east rather than digging to our west. The latest NBM has completely removed any PoP from the forecast for Sunday afternoon and evening. Did not want to completely remove PoP with this update as there is still enough moisture, cyclonic flow aloft, and weak lift for a few showers in the afternoon and evening. A cold front will also move across the area in association with the trough, which may add some weak convergence for shower development. The main trough should continue moving away from New England early next week with ridging building over the eastern CONUS. High pressure should then remain in control through much of next week. However, there is a signal for energy to be left behind across the Middle Atlantic/southeast, which may form a broad cutoff low underneath the ridge through the middle of next week. The cutoff may meander south of the area through Thursday, but there are some hints of it gradually lifting northward mid/late week as the ridge potentially weakens. The NBM/model consensus has kept PoP below 15 percent through Thursday, but potential exists for adjustments to the forecast if guidance trends towards bringing the cutoff low closer to the area mid to late next week. && .AVIATION /18Z THURSDAY THROUGH TUESDAY/... High pressure gradually builds in from the north and west through the TAF period. Mainly VFR conditions expected through the TAF period. Winds N 7-10 KT this afternoon and early evening. Southerly sea breezes will be late, if they even occur. Currently have sea breeze occurring in TAFs at KGON and KISP. KJFK is low confidence and represented as a TEMPO in TAFs for 21Z-00Z. Tonight into early tomorrow winds turn more NE, then closer to easterly. We`ll start the day tomorrow with winds near 10 KT. S/SSE sea breezes will be possible in the afternoon to early evening. ...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty... Low confidence in sea breeze at KJFK. 21-00Z should it occur. .OUTLOOK FOR 18Z FRIDAY THROUGH TUESDAY... Friday Night - Saturday: Outside of patchy early morning fog with brief MVFR to IFR possible in interior locales, mainly VFR. Sunday: MVFR possible with a slight chance of showers. Monday - Tuesday: VFR. Detailed information, including hourly TAF wind component forecasts, can be found at: https:/www.weather.gov/zny/n90 && .MARINE... Winds increase out of the NE late tonight into Friday morning, but still below advisory thresholds during the period. The fetch should also preclude 5 ft seas during this time. Relatively light winds and a lack of significant swell will then sustain sub-advisory conditions through Saturday night. A weak pressure gradient Sunday through early next week will lead to the continuation of conditions below SCA levels. && .HYDROLOGY... There are no hydrologic concerns through the middle of next week. && .TIDES/COASTAL FLOODING... A moderate rip current risk continues through Friday at ocean beaches. 3 ft waves at 8 seconds are expected during this time frame. The rip current risk becomes low on Saturday as waves and swell begin to subside. Some minor flooding across portions of western LI Sound for this afternoon where advisory currently remains in effect. Tides fell a little short of guidance with today`s high tide cycle. Will need to see if this trend continues, but at least there is no threat for flooding tonight. Given the recent trend and latest guidance, thinking is that flooding thresholds are likely not surpassed by much, if at all, for Friday`s daytime high tide cycle. Isolated instances of flooding are still possible, so will go with a statement for Southern Fairfield County and the South Shore back bays of Nassau County. && .OKX WATCHES/WARNINGS/ADVISORIES... CT...Coastal Flood Advisory until 4 PM EDT this afternoon for CTZ009. NY...Coastal Flood Advisory until 4 PM EDT this afternoon for NYZ071. Coastal Flood Advisory until 2 PM EDT this afternoon for NYZ179. NJ...Coastal Flood Advisory until 2 PM EDT this afternoon for NJZ006-106-108. MARINE...None. && $$ SYNOPSIS...DS NEAR TERM... SHORT TERM... LONG TERM...DS AVIATION...BR MARINE...DS HYDROLOGY...DS TIDES/COASTAL FLOODING...