Area Forecast Discussion
Issued by NWS Upton, NY
Issued by NWS Upton, NY
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360 FXUS61 KOKX 232332 AFDOKX Area Forecast Discussion National Weather Service New York NY 632 PM EST Sat Nov 23 2024 .SYNOPSIS... Low pressure over the Canadian Maritime slowly weakens and meanders across the Canadian Maritimes through Monday. Meanwhile, high pressure builds in slowly from the southwest, and moves offshore Monday. A frontal system passes on Tuesday. Low pressure will likely impact the area during the end of the week. && .NEAR TERM /UNTIL 6 AM SUNDAY MORNING/... The fcst is on track. Deep low pressure continues to slowly weaken and meander across the Canadian Maritime tonight as high pressure remains to the southwest of the region. Strong and gusty northwest winds continue into tonight, gradually diminishing. && .SHORT TERM /6 AM SUNDAY MORNING THROUGH MONDAY/... Low pressure continues to slowly weaken and meander across the Canadian Maritime Sunday with gusty northwest winds continuing through Sunday afternoon below gradually diminishing late Sunday afternoon into Sunday night as the low weakens and high pressure to the southwest builds into the region. Dry weather remains Monday as the high will be over the region, and moves offshore Monday afternoon. Despite weak warm advection setting up Sunday night, Sunday night`s low will be lower than Saturday night`s as winds become lighter, and decouple with clearing conditions. Warm advection continues Monday with a weak return flow as high pressure begins to shift east, and a warm front develops to the southwest and west of the region late in the day. && .LONG TERM /MONDAY NIGHT THROUGH SATURDAY/... Not much change in the overall pattern per the latest modeling. First sys is Mon ngt and Tue. Mon ngt has trended mainly dry attm with chances for rain with the warm front early Tue mrng. The cold front then follows with more chances for rain. The NBM pops are pretty high with categorical 12-18Z Tue. Mild temps on Tue as the area briefly gets into the warm sector. Highs around 60 fcst for much of the area. Colder air but not extreme advects in for Wed, so the temp fcst is right around climo with dry wx and partly cloudy skies. A wly breeze of 15-20 mph based on the modeled flow aloft. Increasing clouds Wed ngt, then it looks like pcpn develops on Thanksgiving. Mainly rain, although some of the interior nwrn high spots could mix with snow. Current timing is for the pcpn to hold off in the mrng and develop in the aftn, perhaps aft 16Z or so. This is subject to change this far out. The fcst becomes more challenging Thu ngt and Fri as low pres takes shape nearby and impacts the area. The 12Z ECMWF has developed a deep low and gone interior, which would bring in the warm air and produce a rainy windy storm for the area. The GFS remains consistent, keeping the sys S of the area and not deepening significantly until E of Cape Cod. Trended the fcst towards the GFS due to the consistency of the soln for now. A lot can still change between now and next Fri however. Colder on Sat behind the exiting sys. Used the NBM 50 percent as opposed to the NBM for high temps due to better confidence in the colder airmass. && .AVIATION /00Z SUNDAY THROUGH THURSDAY/... High pressure slowly builds in from the west through Sunday. VFR. NW-WNW winds 10-20kt with frequent gusts 20-30kt and occasional gusts to 35kt this evening. WNW winds weaken into the first part of the overnight and probably increase a little after midnight. For the terminals outside of the city, this increase overnight might not be much, and may not be realized until a few hours after sunrise Sunday. Gusty WNW winds continue through the day on Sunday before gusts finally drop after sunset. ...NY Metro (KEWR/KLGA/KJFK/KTEB)TAF Uncertainty... Winds should prevail at or south/left of 310 magnetic, but may occasionally be north/left of it. OUTLOOK FOR 00Z MONDAY THROUGH THURSDAY... Sunday PM: VFR. WNW winds 15-20kt with occasional G25-30kt, diminishing at night. Monday: VFR. Tuesday: Showers/MVFR likely during the morning. VFR in the afternoon with W gusts 20-25kt. Wednesday: VFR. Thursday: MVFR/IFR with rain - mainly after the morning push. Chance of E-NE gusts 25-30kt in the afternoon. Detailed information, including hourly TAF wind component forecasts, can be found at: https:/www.weather.gov/zny/n90 && .MARINE... Strong gusty northwest winds continues with deep low pressure across the Canadian Maritime and low pressure to the southwest of the forecast waters. Gusts will be gale force into Sunday morning across the ocean waters. The gale warnings remain in effect. Small craft conditions will be on the non ocean waters into early Sunday evening, with occasional gusts near gale force across eastern Long Island Sound Sunday afternoon. Small craft conditions will be likely on the ocean waters, once gales end, Sunday afternoon into Sunday night. Then Monday winds and seas will be below advisory levels. A frontal sys will bring sca cond to the waters Tue into Wed. Chances for sca criteria increase on Thu and Fri as low pres develops in the area. Gales possible on Fri, but uncertainty is too high to include in the hwo attm. && .HYDROLOGY... No hydrologic impacts are expected through next Sat. && .OKX WATCHES/WARNINGS/ADVISORIES... CT...None. NY...None. NJ...None. MARINE...Small Craft Advisory until 6 PM EST Sunday for ANZ331-332-335- 338-340-345. Gale Warning until 1 PM EST Sunday for ANZ350-353-355. && $$ SYNOPSIS...JMC/MET NEAR TERM...JMC/MET SHORT TERM...MET LONG TERM...JMC AVIATION...MW MARINE...JMC/MET HYDROLOGY...JMC/MET