Area Forecast Discussion
Issued by NWS Upton, NY

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775 FXUS61 KOKX 230650 AFDOKX Area Forecast Discussion National Weather Service New York NY 150 AM EST Thu Nov 23 2017 .SYNOPSIS... High pressure builds in through Friday. After a cold frontal passage this weekend, high pressure will build into the region next week. && .NEAR TERM /UNTIL 6 AM THIS MORNING/... Forecast mainly on track. Minor adjustments were made to temperatures, dewpoints, and cloud coverage. Stratocumulus still lingering across the northern tier of the forecast region in the northern portions of the Lower Hudson Valley and interior Southern Connecticut. A steep pressure gradient from a deepening low moving into the Canadian Maritimes and high pressure to the southwest of the region will keep gusty northwest flow through this evening. This will usher in a noticeably colder airmass for tonight into the day Thursday. Under clearing skies, overnight lows will fall to around freezing in the city and into the low to mid 20s across typically cooler outlying areas. While gusts will diminish after midnight as high pressure begins to build in from the west, loosening the pressure gradient, there should be just enough wind overnight to prevent temperatures from completely bottoming out. && .SHORT TERM /6 AM THIS MORNING THROUGH 6 PM FRIDAY/... As high pressure continues to build into the region, Thanksgiving Day will feature plenty of sunshine, but cool temperatures. Highs will rise into the low to mid 40s, about 5-10 degrees below normal. A weak shortwave will cross the region Thursday night, with the only impact to sensible weather being a brief increase in cloud cover overnight. Overnight lows will be a few degrees warmer than tonight, ranging from the mid 20s in outlying areas to the mid 30s in and around New York City. && .LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/... High pressure will build offshore Friday, resulting in return southwesterly flow. This will allow temperatures to rebound to near 50. A lack of moisture looks to produce a sunny day as well. Clouds increase on Saturday ahead of an approaching cold front. There does remain some uncertainty for the day. The NAM indicates a rainy day with low pressure close to the coast. All of the other data keeps this storm way offshore. The incoming 15Z SREF data brings the probability of rain to around 15-25%. Chances in the official forecast have been limited to slight. The cold front comes through Saturday night. This could squeeze out a few sprinkles or a period of very light rain. Slight chances continue for this then the area is dried out overnight. Cooler weather on Sunday and dry. Breezy with northwest winds gusting to perhaps 30 mph or so per the time heights. A shot of rain is again possible Wednesday with a cold frontal passage, otherwise fair weather is expected at this time with a lack of moisture advection into the region. The superblend was generally used for temperatures. && .AVIATION /07Z THURSDAY THROUGH MONDAY/...
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High pressure builds in from the west today into tonight. VFR. NW winds around 10 kt (right of 310 magnetic) for the morning push, likely backing to the west (left of 310 magnetic) in the afternoon. Winds subsiding to less than 5 kt this evening. .OUTLOOK FOR 06Z FRIDAY THROUGH MONDAY... .Late tonight-Friday night...VFR. Light W winds back to the SW Friday. .Saturday-Saturday night...Low prob of -SHRA and MVFR with frontal passage. Windshift from SW to NW late Sat/Sat Eve. .Sunday...Becoming VFR. NW winds G20-30KT forecast. .Monday...VFR. Winds back to more westerly and decrease. Gusts 15-20KT possible.
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&& .MARINE... Ocean seas this evening are still 4-5 ft and wind gusts are near 25-30KT for much of the waters. The Small Craft Advisory remains in effect for all ocean waters through tonight as winds gust to 25-30KT in the wake of a cold front. Gusts will begin to subside overnight for non-ocean waters with winds expected to lower below SCA criteria as high pressure builds into the region. However, seas are expected to remain elevated on the ocean at least through the day on Thursday. With this in mind, the SCA was extended on the ocean through the day on Thursday. 5 ft waves may linger into Thursday night before diminishing. Winds and seas could creep up to close to Small Craft Advisory levels Friday and Friday night on the eastern ocean, otherwise conditions will remain below criteria elsewhere. Marginal Small Craft Advisory conditions are possible on the ocean again on Saturday. All areas will likely see winds hit 25 kt Saturday night and Sunday behind a cold front, with improvement then on Monday. Winds and seas below Small Craft Advisory levels on Tuesday. && .HYDROLOGY... No hydrologic impacts are expected through the forecast period. && .OKX WATCHES/WARNINGS/ADVISORIES...
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CT...None. NY...None. NJ...None. MARINE...Small Craft Advisory until 6 PM EST this evening for ANZ350- 353-355.
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&& $$ SYNOPSIS...FEB/JMC NEAR TERM...FEB/JM SHORT TERM...FEB LONG TERM...JMC AVIATION...JM MARINE...FEB/JMC/JM HYDROLOGY...FEB/JMC is the U.S. government's official web portal to all federal, state and local government web resources and services.