Area Forecast Discussion
Issued by NWS Upton, NY

Current Version |  Previous Version |  Text Only |  Print | Product List |  Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
-- Remove Highlighting --
-- Discussion containing changed information from previous version are highlighted. --
759 FXUS61 KOKX 310024 AFDOKX Area Forecast Discussion National Weather Service New York NY 824 PM EDT Thu May 30 2024 .SYNOPSIS... A weak trough remains over the area this evening. High pressure then builds towards the area tonight into Friday and will remain in control through Saturday. A weak disturbance will move across the region late Sunday into Sunday night and another one late Tuesday into Thursday. && .NEAR TERM /THROUGH TODAY/... Weak low pressure continues to slide off the New England coast this afternoon. A surface trough has been left behind the low as the main upper trough remains off the west. This trough will swing across the area this evening and should pass offshore early Friday morning. The region will be between upper ridging to the west and the upper trough just offshore. Surface high pressure centered over the Great Lakes region begins to build towards the local area. Moisture is limited for the remainder of the afternoon and evening. Instability is lacking, but the trough and cold pocket aloft may be enough to develop isolated showers, mainly east of the NYC metro, through this evening. Any lingering showers will diminish shortly after sunset. Skies will become mostly clear overnight. A chilly night is in store to end May with lows in the middle to upper 40s inland and LI Pine Barrens with lower to middle 50s closer to the coast. Friday will be bit warmer compared to Thursday with temperatures closer to average. It will be partly cloudy with highs in the middle to upper 70s. && .SHORT TERM /TONIGHT THROUGH SATURDAY NIGHT/... The upper ridge will begin shifting overhead Friday night and especially on Saturday before beginning to flatten Saturday night. High pressure will be in control at the surface with its core settling over the Middle Atlantic by Saturday. Surface ridging should remain over the area into Saturday night. Dry conditions will continue during this time period with mostly clear skies. There may be a slight increase in clouds Saturday night as the ridge flattens and a shortwave approaches from the west. Highs on Saturday will be a few degrees above normal in the upper 70s to low 80s. Lows both Friday night will be in the upper 40s inland to the 50s elsewhere. Lows Saturday night will be milder in the upper 50s to low 60s. && .LONG TERM /SUNDAY THROUGH WEDNESDAY/... Not much change in the long term and stuck fairly close to the NBM. Sunday begins with a surface high pressure ridge not too far offshore and an upper ridge overhead. The ridge aloft flattens in the afternoon and evening with the approach and passage of a shortwave. This may trigger a shower in spots Sunday afternoon and night for western and far southern portions of the forecast area. High pressure remains in control Monday into Tuesday. Expect dry conditions on Monday. It will probably remain dry on Tuesday, however will continue to carry some slight chance/chance PoPs Tuesday afternoon and night. There is a chance that a surface trough and shortwave aloft could trigger a shower or two. Tuesday will remain more dry than wet. The pattern doesn`t change all that much for Wednesday, but models seem to agree that the ridging shifts more offshore. Slight chance/chance PoPs therefore for Wednesday as well. A cold front slowly approaches from the west on Thursday, so will keep chance POPs in the forecast. NBM was used for temperatures. Each day will feature highs above normal, ranging mostly from the mid 70s to lower 80s. && .AVIATION /00Z FRIDAY THROUGH TUESDAY/...
-- Changed Discussion --
high pressure gradually builds in from the west through the period. VFR conditions are expected through the TAF period. N to NE winds winds will shift to the NW early tonight, less than 10 kt. Winds shift more to the WNW by late Friday afternoon. A true sea breeze is not expected, but some coastal terminals may shift more toward the W or WSW 18Z-21Z Friday (KJFK, KISP, KBDR, KGON). Winds speeds will be around 10 kt or less on Friday. NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty... No unscheduled amendments expected. OUTLOOK FOR 00Z SATURDAY THROUGH TUESDAY... Friday night through Saturday night: VFR. Sunday: Mainly VFR. MVFR possible with showers possible at times mainly in the evening. Monday: VFR. Tuesday: Mainly VFR. MVFR or lower possible in showers or thunderstorms, mainly N/W of NYC terminals afternoon into early evening. Detailed information, including hourly TAF wind component forecasts, can be found at: https:/www.weather.gov/zny/n90
-- End Changed Discussion --
&& .MARINE... A few wind gusts just under 25 kt possible this evening on the eastern Li Sound and ocean east of Moriches inlet. Otherwise, conditions will remain below SCA levels through the upcoming weekend and continue into the middle of next week. && .HYDROLOGY... No hydrologic impacts are expected through the middle of next week. && .TIDES/COASTAL FLOODING... The rip current risk is moderate for the Suffolk beaches this afternoon, where combo of SE-S long period swells and offshore flow 15 kt should build surf to 3-4 ft. The rip current risk remains low for the Nassau and NYC ocean beaches. There is a low rip current risk Friday and Saturday and supported by RCMOS. && .OKX WATCHES/WARNINGS/ADVISORIES... CT...None. NY...None. NJ...None. MARINE...None. && $$ SYNOPSIS...BC/DS NEAR TERM...DS SHORT TERM...DS LONG TERM...BC AVIATION...JP MARINE...BC/DS HYDROLOGY...BC/DS TIDES/COASTAL FLOODING...