147
FXUS61 KOKX 241515
AFDOKX

Area Forecast Discussion
National Weather Service New York NY
1115 AM EDT Mon Mar 24 2025

.SYNOPSIS...
A frontal system moves across the area through this evening.
Another low will track south of the area late Tuesday night into
Wednesday. High pressure then builds in from the southwest on
Thursday, passing to the south on Friday as a weak disturbance
passes to the north. A frontal system is forecast to impact the
area over the weekend.

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.NEAR TERM /THROUGH TONIGHT/...
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Low pressure near the Great Lakes will continue to push a warm front towards the area into the afternoon. The associated cold front will then quickly move across the area late afternoon through early this evening. Rain, moderate at times, will continue developing across the area, mainly from the NYC metro on north and east into the afternoon. Further NW across the interior, the rain has been less widespread with the better lift residing to the east. Rainfall amounts have been lowered further and it is possible some spots only receive around a tenth of an inch of rain. Elsewhere, generally around three tenths to three quarters of an inch forecast. Moderate rain is possible at times, especially from the NYC metro on north and east. No thunderstorms are forecast as there is minimal MUCAPE available. Strongest winds will occur near the S coast and mainly into the early afternoon with the low level jet passing to our east. A strengthening inversion should prevent any of the stronger low level jet winds from mixing down to the surface. Gusts 25-30 mph are most likely near the coast. Winds will likely weaken this afternoon as the low level jet shifts north and east. Rain quickly tapers off out east this evening with clearing skies overnight. Some mid and high clouds may linger. Adjusted high temps down a bit, but still looking at highs in the low-mid 50s in NYC and NE NJ with upper 40s to low 50s elsewhere. These readings most likely will occur late in the day right ahead of the cold front passage.
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&& .SHORT TERM /TUESDAY THROUGH WEDNESDAY/... Deep mixing on wly flow will warm temps into the 50s for the entire area Tue. This is despite h85 at around -2C. Increasing high clouds ahead of the next sys for Tue ngt and Wed. As an h5 trof digs into the Northeast, low pres develops somewhere near the delmarva and tracks newd over the ocean. There is a clustering of the NAM, GFS, and ECMWF near or SE of the benchmark. This could allow for some pcpn to develop Tue ngt into Wed, with the potential for some snow with decreasing thicknesses. The progressive nature of the sys will be a limiting factor with the sys. Right now pops are in the chc category. Did go with rain or snow wording despite lows in the upr 30s at the coasts. The models may be a bit too warm this far out based on the 00Z consensus track. The NBM is curious placing the highest snow amounts in the nwrn zones, while at the same time having nearly zero, and in some cases zero, qpf. This is a signal that there is a good deal of uncertainty within the ensemble still. Any pcpn with the ocean low exits Wed aftn per the current consensus timing. This is still several periods out so this could change. Went with the NBM for high temps Wed, although if the GFS verifies, temps aloft are a bit too cold to produce the NBM numbers, with highs in the 40s more realistic. && .LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/... Global models remain in good agreement for the first half of this period as a longwave trough extending south from eastern Canada into the Mid Atlantic states on Wednesday lifts out to the north and east through Friday. This will result in a dry period Wednesday night through Friday, minus a sprinkle late Thursday into Thursday night with a weak upper level disturbance. Highs will start off close to normal on Thursday and then are forecast to get well into the 50s in a mild SW flow. However, like 24h ago, differences remain with a frontal boundary that is expected to be in close proximity to the area over the weekend and with the potential for some light overrunning precipitation. The latter of which looks to be mostly rain, but this will depend on the southern extent of polar high pressure that briefly builds to the north Friday night, sending a backdoor cold front across the area. NBM box and whisker plots for Saturday and Sunday show 10 to 20 degree spreads between the 25th and 75th percentiles, most notable for the high temperatures. This shows the potential for highs across the area anywhere from the 40s to lower 70s during this time. There is also quite a variance between the NBM deterministic (cooler) and its median during this time. The operational global 2m temps are generally colder during this time. Bottom line, there is a significant amount of uncertainty with the placement of the polar front this weekend and the temperature forecast. The 00Z globals did show better agreement in the positioning. We will see how this carries over the next several cycles. For the moment, temperatures during this time reflect the NBM deterministic forecast. && .AVIATION /15Z MONDAY THROUGH FRIDAY/... A frontal system will impact the terminals into early this evening, with a cold frontal passage late this afternoon into this evening. The associated low then tracks slowly northward tonight into Tuesday. Conditions vary across the terminals with mainly MVFR, and areas of IFR ceilings. IFR is expected to prevail by late morning into this afternoon. Light rain continues at the terminals, with a period of moderate rain possible, mainly along the coast, into this afternoon. KSWF, may not have much rain and only mentioned in a TEMPO. Rain ends late afternoon into this evening, with conditions returning to VFR. S/SE wind 10-15 kt along coast, and 10 kt or less inland shift more to S/SW midday into this afternoon. With a low level inversion in place, and having strengthened, gusts have either ended or become more occasional and only have a TEMPO for a few high gusts into this afternoon. Southerly low level wind shear expected for from 12-20Z, with 40-50 kt SW winds at 2kft just for some coastal terminals, KJFK, KLGA, KISP, KBDR, and KGON. ...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty... Timing of categorical changes may vary by 1-2 hours. Low chance of LIFR cigs late morning into the afternoon. .OUTLOOK FOR 12Z TUESDAY THROUGH FRIDAY... Tuesday: Mainly VFR. Chance of MVFR to IFR. Rain may mix with snow late Tuesday night. W wind gusts near 20 kt during the day. Wednesday: Mainly rain with MVFR to IFR in the morning. VFR returns in the afternoon. Afternoon NW wind gusts 15- 20 kt. Thursday: VFR. Friday: VFR. W wind gusts 15-20 kt. Detailed information, including hourly TAF wind component forecasts, can be found at: https:/www.weather.gov/zny/n90 && .MARINE...
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The SCA on the Harbor and Western Sound has been cancelled as winds will remain below 25 kt. Elsewhere, the SCA remains unchanged. Winds will larger gust 25-30 kt into the afternoon, but should subside late afternoon and evening. Seas on the ocean stay aoa 5 ft. Winds marginal on Tue, but seas will likely stay at SCA lvls for most of the ocean through the day. Winds likely below SCA levels thru Wed, but seas will be close to thresholds on the ocean. Sub advisory conditions remain on the forecast waters Wednesday night into Thursday, then an increasing W/SW flow could bring seas on the ocean close to 5 ft, especially east of Fire Island Inlet. The flow weakens Friday evening.
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&& .HYDROLOGY... No hydrologic impacts expected through the end of the week. && .OKX WATCHES/WARNINGS/ADVISORIES...
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CT...None. NY...None. NJ...None. MARINE...Small Craft Advisory until 6 PM EDT this evening for ANZ331- 332-340-345. Small Craft Advisory until 6 AM EDT Tuesday for ANZ350-353-355.
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&& $$ SYNOPSIS...JMC/DW NEAR TERM...DS SHORT TERM...JMC LONG TERM...DW AVIATION...MET/DW MARINE...JMC/DW HYDROLOGY...JMC/DW