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Forecast Discussion for New York City/Upton, NY
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308 FXUS61 KOKX 141551 AFDOKX Area Forecast Discussion National Weather Service New York NY 1151 AM EDT Wed Oct 14 2026 .WHAT HAS CHANGED... Added iso thunder and chance showers for portions of NE NJ and NYC metro until early afternoon. && .KEY MESSAGES... 1) A few showers/isolated thunder possible until early afternoon for NE NJ, NYC metro. Otherwise, unseasonably warm and humid conditions today will end with a cold frontal passage this evening, bringing lower humidity and more seasonable conditions to end the week. 2) Showers Thursday night into Friday, with a slight chance of a thunderstorm or two Friday afternoon and early in the evening. No impacts are anticipated with regard to rainfall. 3) Gusty NW winds are possible behind a cold front Friday night into Saturday morning, ushering in the coolest air mass of the season thus far this weekend. && .DISCUSSION... .KEY MESSAGE 1... Lift associated with a jet streak to the north and a weak mid level shortwave ahead of a cold front have generated showers and isolated thunderstorms across NE PA. Have raised PoPs across NE NJ, NYC metro to chance and introduced a 20 PoP into the Lower Hudson Valley. SPC mesoanalysis indicating some marginal MUCAPE around 250 J/kg. This activity, if it makes it to the coast, will be fast moving, with limited impacts other than a brief downpour and a lightning strike or two. Look for warm and humid conditions today, with a SW flow becoming W as a cold front approaches. Highs today will range primarily in the mid 70s right along the immediate coast, to the upper 70s/lower 80s elsewhere. The cold front swings through from W to E early this early evening. Behind the front will come noticeably less humid and cooler air. This will return temperatures closer to normal for this time of year into Thursday. .KEY MESSAGE 2... The next frontal system will approach Thursday night into Friday morning. This will bring the next chance of any meaningful rain late Thursday night into the day Friday. The first batch of rain should be primarily light and will be associated with a warm front. The warm front is progged to lifting further north towards the afternoon, thus a break in the rain is expected for a few hours. A cold front then is expected to follow. The cold front is likely to swing through later in the day or by early evening. This may bring with it some heavier showers along with the slight chance of a few thunderstorms. The consensus on forecasted rainfall amounts looks to be on the order of a half inch. Locally higher amounts of up to one inch cannot be completely ruled out if any convective activity can outperform. The winds will increase right ahead and along the cold front late in the day out of the west, then quickly shift NW for the evening bringing any rain quickly to an end. .KEY MESSAGE 3... As mixing increases in the column immediately behind the cold front look for strong, gusty winds immediately behind the front which may last right into Saturday morning. The longevity of any stronger gusts remains uncertain at this time, with gusts to around 40-45 mph or thereabouts a strong possibility. Subsequent updates may need to determine if any wind headlines will be necessary. Also, behind the front the coolest weather of the fall is likely for the first half of the weekend. Some temperature moderation is likely towards later in the day on Sunday with daytime temperatures recovering close to 60 with lighter winds. && .AVIATION /13Z WEDNESDAY THROUGH SUNDAY/... VFR as a cold front approaches and then moves through this evening. Added a brief showers for some of the terminals through 19Z. WSW flow less than 10 kt become W by late morning increase to around or just over 10 kt. Winds shift NW-N tonight 10 kt or less after fropa this evening. ...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty... A light shower may occur late this afternoon into early this evening with pre-frontal trough and fropa but should not impact flight category. Low probability for TSRA. .OUTLOOK FOR 12Z THURSDAY THROUGH SUNDAY... Thursday: VFR. NE winds G15-20kt possible in the morning. Thursday night: Showers move in late with MVFR or lower cond. Friday: Showers. IFR cond likely, improving to MVFR in the afternoon from the NYC metros north/west. SW winds G20-25kt. Friday night: Showers and possibly a tstm in the evening with mainly MVFR cond, then VFR. Cold fropa followed by W-NW winds G25-35kt. Saturday: Mainly VFR. NW winds G25-35 kt. Saturday night: VFR. NW winds G20-25kt early. Sunday: VFR. Detailed information, including hourly TAF wind component forecasts, can be found at: https:/www.weather.gov/zny/n90 && .MARINE... Lingering SCA seas east of Moriches Inlet continue through midday. A period of marginal SCA conditions may also develop across portions of the waters tonight behind a cold front on a NW flow, at this time it is expected that most zones will remain below thresholds. The pressure gradient relaxes some into Thursday afternoon as high pressure builds with sub advisory conditions prevailing. However, conditions ramp up during Friday morning with SCA conditions quickly developing in S flow, especially for the afternoon. The winds become SW just ahead of a cold front later in the day Friday, then immediately behind the cold front the flow goes NW and should result in gales developing across all waters Friday night into the first half of Saturday. By Saturday afternoon and evening gales should give way to SCA cond. Sub advisory conditions should return by Sunday with winds diminishing. && .CLIMATE... Record High Temperatures: October 14: KEWR: 85/1975 KBDR: 80/1990 KNYC: 84/1920 KLGA: 82/1975 KJFK: 82/1990 KISP: 81/1990 Record High Minimum Temperatures: October 14: KEWR: 67/1990 KBDR: 64/1990 KNYC: 68/1990 KLGA: 70/1990 KJFK: 67/1990 KISP: 66/1990 && .OKX WATCHES/WARNINGS/ADVISORIES... CT...None. NY...None. NJ...None. MARINE...Small Craft Advisory until noon EDT today for ANZ350. && $$ DISCUSSION...JE/DS AVIATION...DW MARINE...JE/DS |
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