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Forecast Discussion for New York City/Upton, NY
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158 FXUS61 KOKX 251123 AFDOKX Area Forecast Discussion National Weather Service New York NY 723 AM EDT Sat Apr 25 2026 .WHAT HAS CHANGED... No significant changes to the forecast. Precipitation amounts for today and Sunday were adjusted down a bit based on the latest guidance trends. && .KEY MESSAGES... 1) Cool, wet conditions are expected today through the weekend. 2) An unsettled pattern develops into mid next week with a series of weather systems affecting the area. && .DISCUSSION... .KEY MESSAGE 1... The area resides on the western periphery of a large upper low over the Maritimes and shortwave ridging to the west. As the large upper low pulls away later today into Sunday, a weak shortwave and attendant low pressure with an inverted trough approach the area. Precipitation chances will begin to increase as the surface low and inverted trough approaches and ultimately passes to the south. Precipitation should start by late morning into early afternoon from northwest to southeast along the inverted trough. Guidance continues to show a period of deep synoptic lift across central NJ this evening into early Sunday, and so a period of moderate rain is possible after about 00Z, especially from NYC south and east NBM probabilities of greater than 1" have increased somewhat over the past model cycles and peak around 70-80% across the LoHud, NE NJ, NYC and western LI. NBM probabilities of greater than 2" are relatively low across the CWA, with max values near 20-25% across NE NJ and Long Island, coinciding with the areas of best synoptic lift. Thus, have gone a widespread 1 - nearly 2" of precip, with highest amounts across the interior, NYC, NE NJ and Long Island. There will be a sharp cutoff in precip to the north and east, with interior and eastern CT looking at 0.5" - 0.75" overall. As this will be a longer duration event, there are no hydrologic concerns at this time, save for some ponding of water in low lying and urban areas. High temperatures today will struggle to reach 50F today given the cloud cover and showers, possible jeopardizing minimum maximum (high) temperatures. See the climate section below. .KEY MESSAGE 2... The CPC 6-10 day outlook depicts a cooler and wetter pattern into early May for the northeast. This looks to be the result of a series of upper lows and shots of cold air originating from central Canada during this timeframe. With respect to sensible weather for this week, after a dry and warmer day on Monday and Tuesday shower chances return late Tuesday through Thursday as a series of weak frontal systems passes through the region. While it won`t be a washout, shower chances remain in the forecast for much of the midweek period. && .AVIATION /12Z SATURDAY THROUGH WEDNESDAY/... A frontal wave approaches from the west later this morning into the day today. The area of low pressure will slide to the southwest tonight and then pass to the south on Sunday. VFR through much of this morning. Conditions will lower to MVFR by afternoon and then IFR late in the day. Some light rain may develop for NYC and Lower Hudson Valley terminals after 12z, but should become steadier and spread eastward late morning into the afternoon. Any rain likely holds off at KGON until late in the day, with conditions remaining VFR through early afternoon or early evening. E/ESE winds early this morning will increase around 10-12 kt by late this morning. Gusts 15-20 kt are possible today, but mainly for the NYC terminals in the afternoon/evening. Tonight, winds turn NE 10-15 kt with gusts continuing. ...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty... Amendments are likely today for the timing of lowering flight categories and onset of rain. Timing may be delayed by as much as 1 to 3 hours. Gusts this afternoon may be occasional. .OUTLOOK FOR 12Z SUNDAY THROUGH WEDNESDAY... Sunday: Improvements to VFR possible for inland terminals in the afternoon. ENE wind gusts 15-20 kt. Monday: Mainly VFR. Tuesday-Wednesday: Chance of showers and MVFR late Tuesday into Wednesday. Detailed information, including hourly TAF wind component forecasts, can be found at: https:/www.weather.gov/zny/n90 && .MARINE... Sub SCA conditions are expected on all waters today. There is a low chance that a few brief gusts may approach 25 kt on the ocean waters west of Fire Island Inlet as low pressure approaches, but confidence is low in occurrence. Gradient flow will increase over the ocean waters and SCA conditions are expected to develop during Sunday morning and persist into Monday, subsiding late in the day as the low moves well southeast of the waters. SCAs will likely be needed with elevated seas and gusts over 25kts. Mainly below SCA conditions are expected Monday night through the middle of next week. Only exception would be for the ocean Monday night when SCA conditions of seas near 5 ft and some brief 25 kt NE wind gusts are forecast. && .CLIMATE... Record Low Maximum Temperatures for Saturday, April 25: KEWR: 48/1955 KBDR: 45/1992 KNYC: 43/1919 KLGA: 48/1955 KJFK: 47/1956 KISP: 47/1965 && .OKX WATCHES/WARNINGS/ADVISORIES... CT...Frost Advisory until 8 AM EDT this morning for CTZ005>008. NY...None. NJ...None. MARINE...None. && $$ DISCUSSION...DBR AVIATION...BR MARINE...DBR |
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NWS New York City/Upton, NY (OKX) Office Forecast Discussions.
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