Area Forecast Discussion
Issued by NWS Upton, NY
Issued by NWS Upton, NY
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937 FXUS61 KOKX 221457 AFDOKX Area Forecast Discussion National Weather Service New York NY 957 AM EST Sat Nov 22 2025 .SYNOPSIS... Weak low pressure passes to the south this morning as a cold front moves through from the northwest. High pressure then builds back into the region this afternoon and moves offshore Sunday as a wave of low pressure passes to the north. Another high builds in from the west Sunday night and moves offshore Tuesday. A frontal system impacts the area late Tuesday into Wednesday. High pressure gradually returns for the end of the week. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... The forecast is generally on track as a wave of low pressure passes to the south this morning, and a cold front moves through from the northwest. The wave of low pressure has trended a little farther to the north and increased probabilities across the forecast area as light rain was falling. Precipitation, all rain, ends rather quickly by this afternoon as the cold front moves through the region. The surface features are associated with closed low pressure remaining over eastern Canada as a weak shortwave rotates around the upper low across the mid Atlantic and off the coast. Once the upper low trough and shortwave move offshore surface high pressure builds in from the west as the upper flow becomes westerly. Temperatures will be near seasonal levels. && .SHORT TERM /6 PM THIS EVENING THROUGH SUNDAY NIGHT/... Zonal flow continues into tonight with the surface high over the region. The upper flow remains progressive and another northern stream shortwave rotates around the closed low bringing a low across the northeast late Sunday into Sunday night. Moisture and forcing will be mainly to the west and north, however, there is a chance of a few light showers/sprinkles across the higher elevations to the northwest Sunday afternoon into the evening. Probabilities are low and will leave the forecast dry. && .LONG TERM /MONDAY THROUGH FRIDAY/... Key Points: * Rain is forecast late Tuesday into Tuesday night. The chance of rain continues on Wednesday, into Wednesday night. * Seasonably cool and dry conditions on Monday, becoming milder for Tuesday and Wednesday. * The potential remains for a seasonably cool and dry Thanksgiving. The main concern in the long term continues to be with a frontal system poised to move across the northeast late Tuesday through Wednesday. High pressure to start the week will give way to the aforementioned frontal system. Warm advection ahead of the associated warm front will develop rain late Tuesday into Tuesday night. This rain should move out of the area Wednesday night. The main upper trough and parent low pressure will reside well to our northwest on Wednesday, so it will take some time for the trailing cold front to move across the region. Confidence remains a bit lower on how much, if any, rain occurs on Wednesday into Wednesday night. However, forcing appears weak and any rain development may be tied to any weaker energy ahead of the trough as the front moves through the area. NBM chance PoPs still look reasonable for Wednesday into Wednesday night. Probabilities should decrease early Thursday as the front pushes offshore. A few members, including the GFS and AI-GFS, slow down the cold front and do not fully move it through until Thanksgiving. This is due to trailing energy rounding the base of the upper trough developing a wave of low pressure on the front. Other guidance (CMC, ECMWF, ECMWF-AIFS) are much quicker with the front bringing in a return to seasonably cool and dry conditions for Thanksgiving. Followed the model consensus for now, but something to watch over the coming days as the main upper trough axis is far enough west that a trend towards a slower progression would not be surprising. Otherwise, the pattern supports a brisk and cold next Friday with highs only reaching the lower and middle 40s with gusty NW winds. && .AVIATION /14Z SATURDAY THROUGH WEDNESDAY/... High pressure builds into the area today into Sunday. MVFR with -SHRA/-RA to start, becoming VFR with rain ending by noon. NW-N winds increasing around 10kt for the afternoon. Winds then diminish tonight and likely become variable in direction for most terminals late tonight. ...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty... Cigs have improved to VFR, but MVFR vsby may linger another hour or two. .OUTLOOK FOR 12Z SUNDAY THROUGH WEDNESDAY... Sunday through Monday: VFR. W-NW gusts 20-25kt late Sunday aftn through Monday morning. Tuesday: VFR, becoming MVFR in the afternoon with a chance of rain. Rain likely at night with MVFR/IFR. Chc S-SW gusts 20-25 kt in the afternoon and evening. Wednesday: Chance of MVFR in rain (around 40 percent). Detailed information, including hourly TAF wind component forecasts, can be found at: https:/www.weather.gov/zny/n90 && .MARINE... Sub-advisory conditions prevail through Sunday. With an increased pressure gradient between low pressure passing to the north and another high building in from the west, SCA conditions will be possible on the ocean waters Sunday night into Monday, with marginal gusts possible on the eastern Sound, east of Port Jefferson/New Haven, and the Long Island bays late Sunday night into Monday morning. With high pressure building back into the area conditions will be sub advisory Monday night through Tuesday. The next chance of SCA conditions looks to be Tuesday night into Wednesday, mainly on the ocean. && .HYDROLOGY... There are no hydrologic impacts expected through next week. && .OKX WATCHES/WARNINGS/ADVISORIES... CT...None. NY...None. NJ...None. MARINE...None. && $$ SYNOPSIS...MET NEAR TERM...MET SHORT TERM...MET LONG TERM...DS/MET AVIATION...JC/JT MARINE...MET HYDROLOGY...MET