605
FXUS61 KOKX 070020
AFDOKX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NEW YORK NY
820 PM EDT SAT SEP 6 2025
SYNOPSIS
A COLD FRONT WILL PASS THROUGH THE AREA THIS EVENING, EXITING
FAR EASTERN LONG ISLAND AND SOUTHEAST CONNECTICUT BY EARLY
SUNDAY MORNING. THE FRONT MOVES FARTHER OUT INTO THE ATLANTIC
SUNDAY. HIGH PRESSURE BUILDING IN LATE SUNDAY INTO MONDAY WILL
PASS EAST OF NEW ENGLAND ON TUESDAY, ALLOWING AN OFFSHORE WAVE
OF LOW PRESSURE TO PASS NEARBY TUESDAY NIGHT INTO WEDNESDAY. A
COLD FRONT WILL APPROACH ON THURSDAY AND PASS THROUGH THURSDAY
NIGHT, FOLLOWED BY CANADIAN HIGH PRESSURE FRIDAY INTO SATURDAY.
NEAR TERM /UNTIL 6 AM SUNDAY MORNING/
SEVERE THUNDERSTORMS ARE NO LONGER A THREAT ACROSS THE FORECAST
AREA THIS EVENING. THE COLD FRONT HAS PUSHED AS FAR EAST AS
INTERIOR SW CT AND BACK INTO THE NYC METRO. THE AIRMASS HAS BEEN
LARGELY WORKED OVER FROM THE EARLIER CONVECTION, HOWEVER, SHOWERS
WILL CONTINUE THIS EVENING, MAINLY ACROSS LI AND SOUTHERN CT.
ANY THUNDERSTORMS WILL BE ISOLATED AND PRIMARILY OFFSHORE.
AFTER MIDNIGHT, EXPECT POST-FRONTAL RAIN TO DEVELOP BEHIND THE
FRONT DUE TO UPPER JET DYNAMICS AND STRONG MID LEVEL FRONTOGENESIS.
THIS AREA WILL INITIALLY DEVELOP NORTH AND WEST OF NYC, BUT GRADUALLY
TRANSLATES EAST OVERNIGHT.
LOWS WILL DROP INTO THE UPPER 50S TO LOWER 60S. WINDS BECOME
MORE NORTHERLY TONIGHT.
SHORT TERM /6 AM SUNDAY MORNING THROUGH SUNDAY NIGHT/
FOR SUNDAY, RIGHT REAR QUAD OF UPPER LEVEL JET REMAINS NEAR THE
REGION, SUPPORTING SYNOPTIC LIFT. DESPITE THE COLD FRONT BEING
SOUTHEAST OF THE REGION, THERE WILL BE ENOUGH MOISTURE FOR RAIN
TO REMAIN ACROSS THE REGION, ESPECIALLY EARLY AND ESPECIALLY
ALONG THE COAST. THE FORECAST HAS TRENDED HIGHER WITH RAIN FOR
SUNDAY COMPARED TO PREVIOUSLY FORECAST. FORECAST HIGH TEMPERATURES
ONLY IN THE UPPER 60S TO LOWER 70S FOR SUNDAY.
FAVORABLE LIFT AREA FROM UPPER JET SHIFTS NORTHEAST OF THE
REGION SUNDAY NIGHT. UPPER LEVELS STILL HAVE A TROUGH ACROSS THE
REGION BUT AT THE SURFACE, HIGH PRESSURE WILL BEGIN TO BUILD IN
FROM THE WEST. DRIER CONDITIONS EXPECTED ALONG WITH A DECREASE
IN CLOUDS. THIS WILL ALLOW FOR MORE RADIATIONAL COOLING, WITH
FORECAST LOWS RANGING FROM THE MID 40S TO UPPER 50S.
LONG TERM /MONDAY THROUGH SATURDAY/
THE PERIOD WILL START OFF WITH A LONGWAVE TROUGH LIFTING ACROSS
EASTERN CANADA ON MONDAY, WITH CONFLUENCE TO ITS REAR SUPPORTING
HIGH PRESSURE BUILDING OVER OVER THE AREA THROUGH MON, THEN PASSING
E OF TUE. HEIGHTS ALOFT THEN RISE ALONG THE COAST INTO TUESDAY AS
THE NORTHERN STREAM TROUGH DEPARTS, WHILE A SHORTWAVE TROUGH ALONG
THE SOUTHEAST COAST LIFTS NORTHEASTWARD ALONG THE PERIPHERY OF THE
OFFSHORE RIDGE. THIS WAVE SHOULD BRING A CHANCE OF SHOWERS MAINLY TO
LONG ISLAND AND SE CT FROM LATE TUE NIGHT INTO WED. AS THE LONGWAVE
TROUGH BECOMES RE-ESTABLISHED OVER ERN CANADA LATER IN THE WEEK,
THIS SHOULD SEND A DRY COLD FRONT THROUGH THU INTO THU NIGHT, WITH
HIGH PRESSURE BUILDING FROM THE NW IN ITS WAKE.
TEMPS WILL BE MOSTLY A LITTLE BELOW NORMAL, WITH HIGHS IN THE 70S
AND LOWS MOSTLY FROM NEAR 60S IN NYC TO THE MID 40S AND 50S
ELSEWHERE. THE EXCEPTION TO THIS WILL BE ON THU BETWEEN PASSAGE OF
THE OFFSHORE WAVE AND APPROACH OF THE COLD FRONT, WITH HIGHS IN THE
UPPER 70S/LOWER 80S, A LITTLE ABOVE NORMAL.
AVIATION /00Z SUNDAY THROUGH THURSDAY/
A COLD FRONT MOVES OFFSHORE TONIGHT. HIGH PRESSURE THEN BUILDS
IN SUNDAY.
SHOWERS AND THUNDERSTORMS CONTINUE TO PUSH THROUGH LONG ISLAND
AND SOUTHERN CT THIS EVENING. THE NYC TERMINALS REMAIN ON THE
WESTERN EDGE OF THIS ACTIVITY, THOUGH BY 0100-0200Z SHOULD BE
FREE OF ANY RA/TSRA. WIND GUSTS ASSOCIATED WITH ANY
THUNDERSTORMS DIMINISH AS THE LINE MOVES EAST THIS EVENING.
OUTSIDE OF ANY LINGERING TSRA, WINDS BECOME NORTHERLY AND
LIKELY GO VARIABLE IN DIRECTION LATE IN THE TAF PERIOD. WINDS
BECOME NORTHWEST ON SUNDAY, 5-10KTS.
...NY METRO (KEWR/KLGA/KJFK/KTEB) TAF UNCERTAINTY...
THERE REMAINS SOME UNCERTAINTY WITH THE TIMING OF THE ARRIVAL OF
SHOWERS AND THUNDERSTORMS THIS AFTERNOON WITH AMENDMENTS BECOMING
INCREASINGLY LIKELY LATE IN THE DAY AND INTO THE EVENING.
GUSTS OF 30 TO 40 KT ARE POSSIBLE WITH ANY OF THE STRONGER
THUNDERSTORMS TODAY. IF STORMS BECOME SEVERE GUSTS AROUND 50 KT ARE
POSSIBLE. HIGHER CHANCES FOR SEVERE ARE WITH KEWR AND KTEB.
START TIME OF WIND GUSTS MAY BE OFF AN HOUR OR TWO.
OUTLOOK FOR 00Z MONDAY THROUGH THURSDAY
SUNDAY NIGHT: VFR.
MONDAY AND TUESDAY: VFR.
WEDNESDAY: POTENTIAL FOR MVFR IN -SHRA.
THURSDAY: VFR.
DETAILED INFORMATION, INCLUDING HOURLY TAF WIND COMPONENT FORECASTS,
CAN BE FOUND AT: HTTPS:/WWW.WEATHER.GOV/ZNY/N90
MARINE
SCA HAS EXPIRED ACROSS THE OCEAN WATERS, BUT THERE COULD BE A
FEW GUSTS UP TO 25 KT, MAINLY EAST OF FIRE ISLAND INLET. WINDS
AND LOWER TONIGHT WITH SUB- SCA CONDITIONS EXPECTED FOR THE
REMAINDER OF THE WEEKEND. HIGHER WINDS AND SEAS WITHIN AND NEAR
THUNDERSTORMS, BUT THUNDERSTORMS SHOULD BECOME LESS COVERAGE BY
MID TO LATE THIS EVENING AND EVEN LESS OVERNIGHT INTO EARLY
SUNDAY.
THE SUB-SCA CONDITIONS CONTINUE MONDAY AND MONDAY NIGHT WITH
HIGH PRESSURE IN CONTROL.
THE PRESSURE GRADIENT WILL TIGHTEN TUE INTO WED AS AN OFFSHORE WAVE
OF LOW PRESSURE PASSES BY. E FLOW AROUND 15 KT ON TUE SHOULD
INCREASE TO NE 15-20 KT LATE TUE NIGHT INTO WED, BUILDING OCEAN SEAS
TO 5-6 FT FROM TUE NIGHT INTO WED. THERE COULD ALSO BE A FEW GUSTS
UP TO 25 KT ON THE OCEAN LATE TUE NIGHT INTO WED MORNING. GUSTS/SEAS
ON THE NON OCEAN WATERS SHOULD REMAIN BELOW 25 KT AND 5 FT.
HYDROLOGY
THERE IS NO LONGER AN ISOLATED FLOOD THREAT ACROSS THE AREA AS
CONVECTION HAS WEAKENED. A STRATIFORM RAIN WILL DEVELOP LATER
TONIGHT, MAINLY AFTER MIDNIGHT INTO SUNDAY MORNING. AN ADDITIONAL
0.25 TO ONE INCH OF RAINFALL IS POSSIBLE, BUT THIS WILL BE OVER
A 12-18 HOUR PERIOD.
OTHERWISE, NO OTHER HYDROLOGIC PROBLEMS EXPECTED.
TIDES/COASTAL FLOODING
FOR SUNDAY, A MODERATE RISK, WITH A SOUTHERLY SWELL OF AROUND 3
FT AND 7 SECONDS. HOWEVER, WINDS WILL BE LESS OF A FACTOR DUE
TO BEING OFFSHORE AND GENERALLY LESS THAN 10 KT. SIMILAR
CONDITIONS ON ALL WATERS FOR MONDAY, WITH ANOTHER MODERATE RISK.
OKX WATCHES/WARNINGS/ADVISORIES
CT...NONE.
NY...NONE.
NJ...NONE.
MARINE...NONE.
SYNOPSIS...BG/JM/DW
NEAR TERM...JM/DW
SHORT TERM...JM
LONG TERM...BG
AVIATION...DBR
MARINE...BG/JM
HYDROLOGY...JM
TIDES/COASTAL FLOODING...
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