421
FXUS61 KBOX 222332
AFDBOX
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
732 PM EDT THU OCT 22 2026
WHAT HAS CHANGED
GALE WARNINGS HAVE BEGUN TO BE REPLACED BY SMALL CRAFT
ADVISORIES FOR NEAR SHORE SOUTHERN WATERS, AND THIS WILL
CONTINUE OVER THE NEXT 24 HOURS.
KEY MESSAGES
- COOLER DAY ON FRIDAY WITH PLENTY OF SUN AND DIMINISHING WIND.
- PROLONGED STRETCH OF DRY WEATHER WITH SEASONABLE TEMPERATURES
PREVAILS THIS WEEKEND INTO MUCH OF NEXT WEEK.
DISCUSSION
KEY MESSAGE 1...COOLER DAY ON FRIDAY WITH PLENTY OF SUN AND
DIMINISHING WIND.
FRIDAY WILL CONTINUE THE STRETCH OF BEAUTIFUL FALL WEATHER FOR THE
REGION AS WE SAY GOODBYE TO ANY INFLUENCE FROM SUBTROPICAL STORM
JOSEPHINE, REPLACED BY BUILDING HIGH PRESSURE ENCROACHING FROM THE
NORTH. THE WEAKENING GRADIENT WILL MEAN LESS OF THAT NORTHERLY WIND
THROUGH THE DAY. AFTER WINDS INITIALLY START OUT BREEZY, GUSTING 15-
25 MPH THEY'LL END THE DAY MUCH LIGHTER. OVERNIGHT IN FACT, UNDER
HIGH PRESSURE WINDS WILL BECOME CALM UNDER CLEAR SKIES, SO LOWS WERE
TRENDED TOWARD THE COLDER MOS GUIDANCE, IN THE UPPER 20S TO LOW 30S.
THIS, AFTER A COOLER DAY ON FRIDAY AFTER COLD ADVECTION KICKS IN
ALOFT; 925MB TEMPS DROP FROM 9C TODAY TO 0-1C ON FRIDAY LEADING TO
HIGHS IN THE 50S.
KEY MESSAGE 2...PROLONGED STRETCH OF DRY WEATHER WITH
SEASONABLE TEMPERATURES PREVAILS THIS WEEKEND INTO MUCH OF NEXT
WEEK.
A PROLONGED STRETCH OF DRY BUT PLEASANT AUTUMN WEATHER IS IN STORE
FOR SOUTHERN NEW ENGLAND SPANNING THIS WEEKEND THEN CONTINUING INTO
A LARGE PORTION OF THE UPCOMING WORKWEEK. EXPANSIVE AREA OF SURFACE
HIGH PRESSURE OF AROUND 1030-1034 MB WILL REMAIN ANCHORED ACROSS THE
NORTHEAST AND MID-ATLANTIC REGION, WITH MILD DAYS AND COOL NIGHTS
WITH STRONG DIURNAL TEMPERATURE RANGES. ABOUT THE ONLY NUANCED
DIFFERENCE IS THAT A COLD FRONT SAGS SOUTHWARD MONDAY NIGHT INTO
TUESDAY WITH A COOLER NORTHERN-STREAM AIRMASS FILTERING SOUTHWARD;
BUT THE FRONT IS MOISTURE-STARVED AND ONLY SEEMS CAPABLE OF
PRODUCING SOME ENHANCED CLOUDINESS MONDAY EVENING AND A COOLDOWN IN
HIGH TEMPS MOVING INTO NEXT WEEK. MILDEST DAYS LOOK TO BE THIS
WEEKEND WITH TEMPERATURES IN THE MID TO UPPER 60S, BUT THERE COULD
BE A SHOT AT 70 DEGREES WITH SEVERAL DAYS OF DRY WEATHER SERVING AS
A MILD FEEDBACK MECHANISM FOR OVERACHIEVING MAXIMUM TEMPS OVER
GUIDANCE. HIGHS THEN COOL OFF INTO THE MID 50S TO LOW 60S FOR EARLY
NEXT WEEK AS THE COOLER LOWER-LEVEL AIRMASS WORKS IT WAY IN (925 MB
TEMPS DIP TO AROUND +2 TO +4C), ONLY MODIFYING TOWARD MID TO LATE
NEXT WEEK.
AVIATION /00Z FRIDAY THROUGH TUESDAY/
FORECASTER CONFIDENCE LEVELS...
LOW - LESS THAN 30 PERCENT.
MODERATE - 30 TO 60 PERCENT.
HIGH - GREATER THAN 60 PERCENT.
00Z TAF UPDATE:
TONIGHT: HIGH CONFIDENCE.
VFR, WITH FEW-SCT STRATOCU AS COOL FRONT SAGS SOUTH FROM NH/VT
EARLY TONIGHT. NORTH WINDS AROUND 8-12 KT, THOUGH AROUND 12-16
KT WITH GUSTS TO 25-30 KT FOR CAPE AND ISLANDS.
FRIDAY...HIGH CONFIDENCE.
VFR. NORTHERLY WINDS ACROSS MUCH OF THE REGION, THOUGH WINDS
REMAIN ELEVATED EAST/SOUTHEAST OF I-95, WITH SUSTAINED SPEEDS
OF 8 TO 12 KT AND GUSTS OF 18 TO 25 KTS. WINDS GRADUALLY
DECREASE THROUGH THE AFTERNOON/EVENING FRIDAY IN THOSE
LOCATIONS.
FRIDAY NIGHT...HIGH CONFIDENCE.
VFR. WINDS LIGHT AND VARIABLE TO CALM.
KBOS TERMINAL...HIGH CONFIDENCE IN TAF.
KBDL TERMINAL...HIGH CONFIDENCE IN TAF.
OUTLOOK /FRIDAY NIGHT THROUGH TUESDAY/...
SATURDAY THROUGH MONDAY: VFR.
MONDAY NIGHT THROUGH TUESDAY: VFR. BREEZY.
MARINE
FORECASTER CONFIDENCE LEVELS...
LOW - LESS THAN 30 PERCENT.
MODERATE - 30 TO 60 PERCENT.
HIGH - GREATER THAN 60 PERCENT.
THROUGH FRIDAY NIGHT...HIGH CONFIDENCE IN HAZARDOUS MARINE
CONDITIONS.
DANGEROUS TO LIFE-THREATENING MARINE CONDITIONS CONTINUE AS
SUBTROPICAL STORM JOSEPHINE REMAINS OFFSHORE OF SOUTHERN NEW
ENGLAND. STRONG HIGH PRESSURE TO THE NORTH, COMBINED WITH JOSEPHINE
TO THE SOUTHEAST, MAINTAINS A TIGHT PRESSURE GRADIENT ACROSS THE
COASTAL WATERS, RESULTING IN PERSISTENT NORTHEAST WINDS AND LARGE
SEAS.
GALE WARNINGS REMAIN IN EFFECT ACROSS MOST COASTAL WATERS
THROUGH AT LEAST 8 PM THIS EVENING, WITH NORTHEAST WIND GUSTS
GENERALLY RANGING FROM 30 TO 45 KT. AS JOSEPHINE TRACKS
NORTHEAST INTO THE NORTH ATLANTIC, WINDS GRADUALLY DIMINISH FROM
WEST TO EAST THIS EVENING. GALE WARNINGS ACROSS THE WATERS WEST
OF NANTUCKET AND MARTHA'S VINEYARD ARE EXPECTED TO EXPIRE AT 8
PM, WITH SMALL CRAFT ADVISORIES NEEDED THEREAFTER FOR LINGERING
GUSTY WINDS AND ELEVATED SEAS. FARTHER EAST, GALE-FORCE GUSTS
WILL PERSIST LONGER, WITH GALE WARNINGS CONTINUING THROUGH EARLY
FRIDAY AFTERNOON. ONCE THESE WARNINGS EXPIRE, SMALL CRAFT
ADVISORIES WILL LIKELY BE NEEDED AS WINDS GRADUALLY SUBSIDE BUT
SEAS REMAIN ELEVATED.
MARINE CONDITIONS CONTINUE TO IMPROVE FRIDAY NIGHT AND INTO THE
WEEKEND AS JOSEPHINE PULLS FARTHER AWAY AND HIGH PRESSURE BUILDS
INTO SOUTHERN NEW ENGLAND. HOWEVER, ELEVATED SEAS MAY LINGER BEYOND
THE STRONGEST WINDS.
OUTLOOK /FRIDAY NIGHT THROUGH TUESDAY/...
SATURDAY: WINDS LESS THAN 25 KT. AREAS OF ROUGH SEAS.
SATURDAY NIGHT: WINDS LESS THAN 25 KT. LOCAL ROUGH SEAS.
SUNDAY: WINDS LESS THAN 25 KT. AREAS OF SEAS APPROACHING 5 FT.
SUNDAY NIGHT THROUGH MONDAY NIGHT: WINDS LESS THAN 25 KT.
TUESDAY: WINDS LESS THAN 25 KT. AREAS OF SEAS APPROACHING 5 FT.
BOX WATCHES/WARNINGS/ADVISORIES
CT...NONE.
MA...NONE.
RI...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 8 AM EDT FRIDAY FOR ANZ230-233>235-
237.
GALE WARNING UNTIL 2 PM EDT FRIDAY FOR ANZ231-232-250-251-254-
255-280>282.
SMALL CRAFT ADVISORY UNTIL 2 AM EDT SATURDAY FOR ANZ256.
DISCUSSION...BW
AVIATION...BW/MENSCH
MARINE...DOOLEY
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