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Forecast Discussion for New York City/Upton, NY
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682 FXUS61 KOKX 121824 AFDOKX Area Forecast Discussion National Weather Service New York NY 224 PM EDT Sun Jul 12 2026 .WHAT HAS CHANGED... No significant changes at this time. && .KEY MESSAGES... 1) Seasonably warm & dry conditions continue into Monday. 2) Hot & humid conditions expected Tuesday & Wednesday. 3) Seasonable warmth returns late this week into the weekend. An occasional shot or two of unsettled weather is possible, but low confidence in timing. 4) Brief minor tidal flooding expected around the times of high tide this evening. && .DISCUSSION... .KEY MESSAGE 1... Canadian high pressure remains centered over the region into tonight, gradually moving offshore into tomorrow. This will maintain dry and warm temperatures with comfortable humidity values with dew points in the low 60s. .KEY MESSAGE 2... As high pressure remains offshore, the return S/SW flow will advect more low level moisture into the area, allowing dew points to increase into the middle of the week into the low 70s. 500mb heights rise aloft by Tuesday to around 590 dam with an upper-level ridge remaining to our west over the Central US into the mid-Atlantic. These two factors will support warmer, more humid area settling into the area on Tuesday with highs climbing into the low to mid 90s. Heat Index values could reach the mid to upper 90s. On Wednesday, a trough in Canada sags southward, suppressing surface high pressure farther south of the region. This will result in winds taking on a more westerly component, aiding in the advection of warm air into the area. Highs may reach the mid to upper 90s on Wednesday as a result, with heat index values ranging from 95 to 102. Should this forecast remain on track, Heat Advisories could be hoisted for Tuesday and Wednesday given the criteria of reach 95+ heat index for two consecutive days. However, some uncertainties remain with dewpoints, mixing heights and the areal extent of 95+ heat indices, especially on Wednesday. Therefore, have opted to hold off on issuing a Heat Advisory, for the moment. .KEY MESSAGE 3... The region will continue to remain between an upper-level Canadian trough to the northeast and an upper-level ridge to the southwest through the late week into weekend timeframe. However, heights overall will be lower with several weak shortwaves passing to our north through the late week/weekend period. This will primarily result in temperatures closer to seasonal averages and more passing cloud cover. The question around unsettled weather remains uncertain. Long term guidance hints at a few chances for showers or thunderstorms late week in the weekend brought on by several passing shortwaves. However, timing and magnitude with these shortwaves remains too variable to get a handle on a higher confidence period for these showers or storms to occur. For now, have gone with 30-50% POPs on Thursday and Saturday. .KEY MESSAGE 4... The combination of high astronomical tides due to the upcoming new moon on July 14 and a minor of push of water toward the coastline in an E/SE flow today will once again bring water levels in some locations to around or just above minor coastal flood benchmarks. The locations that are most susceptible are the more vulnerable locales of coastal Fairfield, southern Nassau/Queens, and tidal areas of NE NJ and Staten Island. A coastal flood statement remains in effect for these locations covering the evening high tide cycle. The threat may linger longer into early next week as we approach the new moon, however, much of the guidance keeps water levels just below as winds become southerly. This will have to be watched though as we could still skirt near minor flood thresholds. Any flooding at that time would be brief/minor. && .AVIATION /19Z SUNDAY THROUGH FRIDAY/... High pressure northwest of the region will move offshore this afternoon and remain in place through Monday. VFR. Winds remain fairly light through the TAF period. Winds will continue to become more S/SE this afternoon with speeds remaining 10kt or less. Winds diminish this evening to under 5 kt. Speeds increase back to 5-10kt mid to late morning on Monday. ...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty... Timing of wind shifts may vary by 1-2 hours. .OUTLOOK FOR 18Z MONDAY THROUGH FRIDAY... Monday: VFR. Tuesday-Wednesday: VFR. W-SW gusts 15-20 kt. Thursday and Friday: VFR. && .MARINE... Sub-SCA conditions expected through tonight. Light southerly flow is expected on Monday with gusts to 20 knots possible Monday evening into Monday night. The next solid chance of SCA conditions will be Tuesday afternoon into Wednesday as southwest winds increase and ocean seas builds to 4-7 ft, highest east. Gusts may approach 30 kt out east during this time. Sub-SCA conditions are then expected Wednesday night through Friday. Rip Currents: A moderate risk forecast for today with a continued E- W longshore current dominant environment not too much different from that of yesterday, when many beach reports came in moderate with 2-3 ft wind waves, 1-2-ft S-SE swell, and greater than usual tidal fluctuations due to the upcoming new moon on the 14th. The risk could become low Mon morning, but should rebound to moderate in the afternoon as light S flow increases to 10-15 kt in the afternoon, building wind waves to 3 ft. Rip Current Outlook: There could be a period of high risk spanning late day Tue into part of Wed morning as seas build to 4-6 ft on a SW flow increasing to around 20 kt, and greater than usual tidal fluctuations associated with the upcoming new moon. && .OKX WATCHES/WARNINGS/ADVISORIES... CT...None. NY...None. NJ...None. MARINE...None. && $$ DISCUSSION...BR AVIATION...BC MARINE...BR |
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NWS New York City/Upton, NY (OKX) Office Forecast Discussions.
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