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Forecast Discussion for New York City/Upton, NY
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674 FXUS61 KOKX 131447 AFDOKX Area Forecast Discussion National Weather Service New York NY 947 AM EST Fri Feb 13 2026 .WHAT HAS CHANGED... Increased likelihood for a dusting to 1/2" of light snow for much of the area late Tonight. && .KEY MESSAGES... 1) Dry conditions and below normal temperatures today. 2) Scattered snow showers or a brief period of light snow likely late Tonight with vigorous shortwave/cold frontal passage. 3) The probability for a light accumulating snowfall Sunday night into Monday remains low. 4) Progressive low pressure systems will bring rain/snow chances mid to late week. Low predictability on p-type details at this point. && .DISCUSSION... .KEY MESSAGE 1... Region remains under influence of NE troughing today, although with deep cyclonic flow relenting. Noticeably weaker NW wind gusts today (15-20mph) as caa wanes, but temps will run about 10 degrees below normal under moderating heart of Canadian airmass. .KEY MESSAGE 2... Backside northern stream shortwave and left front of ULJ streak pivoting through the region late tonight, with resultant weak frontal system will bring likelihood for scattered snow showers or brief period of light to moderate snow after midnight tonight, ending by daybreak. Deterministic models have trended stronger with this shortwave and resultant brief light to moderate snow potential. This is supported by 00z mesoscale CAMs, signaling potential for an hour of so of moderate snow. 00Z SPC HREF ensemble mean of one hour of 1/4 to 1/2" rates. WPC WSE mean of 1/4 to 1/2" storm total snow, with reasonable worst case 3/4 to 1". Based on above, a swath of dusting to 1/2", with locally 1" of snow likely where moderate area of snow showers/light snow traverses. Temps should be able to wet-bulb from upper 20s/lower 30s this evening into lower- mid 20s interior - mid to upper 20s coast, allowing accumulation on most surfaces where moderate banding occurs. Model guidance generally focused on LoHud, NE NJ, NYC and W LI with path of heaviest activity, in closer proximity to vort max. There is of course inherent uncertainty on exact location. This threat may shift 10-20 miles east or west, so plan for snow covered roads tonight into early Saturday morning across the area. Snow should push southeast of the region by daybreak. .KEY MESSAGE 3... Deterministic GFS/ECMWF/GEM/NAM model guidance continue in good agreement with northern stream shortwave and southern stream low remaining unphased, with a progressive west to east movement of a southern low and secondary development along the the Mid Atlantic coast and then offshore. This prevailing scenario at this point would only potential for a period of light snow (possibly mixed with rain NYC/NJ metro and LI) or snow showers/snow flurries Sun Night into Mon. This would mainly be forced by northern stream shortwave lift briefly expanding northern edge of precip shield. ECMWF/GFS/GEM NWP ensemble means have come into better agreement with keeping low pressure well south of the region as well, with ECMWF now in line with GEFS and GEPS in mainly clustering low pressure tracks off the Mid Atlantic coast and well south of the region. ECMWF has trended down from a 30-50% ensemble relative frequency of 1-3" 24hrs ago, down to less than 20%. Very slight probs (less than 10%) of this scenario with GEPS and GEFS. GFS and ECMWF AI ensembles are exhibiting similar behavior to their NWP counterparts, with both trending south with their QPF axis over the last 24 hours. The 00z GFS AI is now south of region with it probs for .1" liquid qpf, while 00z ECMWF AI continue to trend downward with prob for a 1-3" snowfall (now only 10-20%, half the prob of 24 hrs ago). Latest NWS NBM superensemble, prob of 1" snowfall remains in the 10-20% range. 00z WPC WSE mean of around 1/2", with reasonable worst case of 3-5". This is half of yesterday, and seems like a reasonable forecast at this point. Ensemble sensitivity still appears to predominantly to lie in shortwave energy coming onshore across the PAC NW this evening, and its amplitude/timing and degree of interaction with the southern stream upper low Sun Night/Mon. A deeper northern stream shortwave solution favoring more interaction with southern stream and farther north/amplified surface low pressure, which is seemingly accounting for the reasonable worst case scenarios. Have stayed close to NBM pops, with continued low probability for a light accumulating snowfall. With key shortwave features coming onshore this evening, should see more refinement in this forecast over the next 24 hours. && .AVIATION /14Z FRIDAY THROUGH TUESDAY/... VFR today as high pressure remains in control. NW around 10kt this morning become more W in the afternoon. This evening, the winds back to the W-WSW. Increasing confidence for some light snow and IFR/MVFR conditions after 06z Saturday. Will cover this threat with a TEMPO group. ...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty... Winds should prevail north/right of 310 magnetic until around 19-20z, then south/left of it thereafter. Timing of snow overnight may be off by an hour or two, there is still a chance of no snow at all. .OUTLOOK FOR 12Z SATURDAY THROUGH TUESDAY... Saturday: VFR. W wind gusts 15-20 kt possible. Sunday: VFR. Sunday night and Monday: Mainly VFR. Chance of MVFR or lower and snow, mainly Sunday night and early Monday. Tuesday: VFR. Detailed information, including hourly TAF wind component forecasts, can be found at: https:/www.weather.gov/zny/n90 && .MARINE... Sub-advisory conditions through Sunday as high pressure builds south and west of the waters. The exception will be potential for marginal SCA gusts Fri Night into early Sat AM with a cold frontal passage. Low potential for SCA conditions with low pressure passing to the south and east Sunday night into Monday. Next chance for SCA Tuesday Night into Wed in wake of a cold frontal passage. && .OKX WATCHES/WARNINGS/ADVISORIES... CT...None. NY...None. NJ...None. MARINE...None. && $$ DISCUSSION...NV AVIATION...BC/JC MARINE...NV |
Previous Forecast Discussions may be found at
NWS New York City/Upton, NY (OKX) Office Forecast Discussions.
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