174  
FXUS61 KBOX 091122  
AFDBOX  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE BOSTON/NORTON MA  
722 AM EDT THU OCT 9 2025  
   
SYNOPSIS
 
 
HIGH PRESSURE BUILDS IN FROM THE WEST, BRING DRIER AND COLDER  
CONDITIONS INTO SATURDAY. A COASTAL STORM MAY BRING SOME RAIN  
AND GUSTY WINDS TO START NEXT WEEK, ALONG WITH THE RISK FOR SOME  
COASTAL FLOODING AND EROSION.  
 

 
   
NEAR TERM /UNTIL 6 PM THIS EVENING/
 
 
KEY MESSAGES:  
 
* DRIER AND COLDER TODAY WITH GUSTY N TO NW WINDS.  
 
HIGH PRESSURE MOVES OVER THE GREAT LAKES TODAY. THIS WILL RESULT  
IN GUSTY WINDS ACROSS SOUTHERN NEW ENGLAND FOR AT LEAST PART OF  
TODAY. BELOW NORMAL TEMPERATURES ANTICIPATED.  
 

 
   
SHORT TERM /6 PM THIS EVENING THROUGH 6 PM FRIDAY/
 
 
KEY MESSAGES:  
 
* TURNING COLD OVERNIGHT WITH FREEZING TEMPERATURES FOR MOST,  
AND FROST NEAR THE COAST.  
 
HIGH PRESSURE MOVES MORE OVERHEAD TONIGHT. THIS WILL LEAD TO  
LIGHT TO NEAR CALM WINDS. WITH CLEAR SKIES, IT WILL BE A CHILLY  
NIGHT. FROST ADVISORIES POSTED NEAR THE EAST COAST OF MA, AS  
WELL AS ALONG THE COAST OF NARRAGANSETT BAY. A TRICKIER  
DECISION FOR THE VINEYARD. WHILE A FEW SPOTS ACROSS THE INTERIOR  
COULD FALL BELOW FREEZING, THOUGHT FROST WOULD BE MORE  
WIDESPREAD THAN THE FREEZING TEMPERATURES, HENCE THE FROST  
ADVISORY THERE. ELSEWHERE, CONVERTED TO FREEZE WARNINGS WHERE  
THE PROGRAM CONTINUES. DECIDED TO ADD WESTERN ESSEX COUNTY TO  
THE FREEZE WARNING BASED ON THE LATEST TEMPERATURE GUIDANCE.  
 
DRY WEATHER CONTINUES FRIDAY, BUT TEMPERATURES EXPECTED TO  
REMAIN BELOW NORMAL.  
 

 
   
LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/
 
 
KEY MESSAGES:  
 
* SLIGHTLY WARMER SATURDAY BEFORE HIGHS RETURN TO THE LOWER 60S  
 
* COASTAL STORM MAY BRING SOME RAIN AND GUSTY WINDS TO START NEXT  
WEEK, ALONG WITH THE RISK FOR SOME COASTAL FLOODING AND EROSION  
 
HIGH PRESSURE ALONG WITH AN UPPER LEVEL TROUGH TO OUR EAST WILL  
SHIFT OUT TO SEA GOING INTO SATURDAY, THOUGH 925 MB TEMPERATURES  
ACROSS MUCH OF THE GUIDANCE THEN REBOUNDS SOUNDLY TO AROUND 10C  
AND HIGHER IN SOME SPOTS. HIGH TEMPERATURES SATURDAY WILL LIKELY  
BE THE HIGHEST OF THIS WEEKEND, REACHING THE MID TO UPPER 60S  
ACROSS THE REGION. SOME HIGHER CLOUDS START TO MOVE IN SATURDAY  
AS WELL ASSOCIATED WITH A COASTAL STORM THAT WILL CONTINUE TO  
FORM WELL TO OUR SOUTH.  
 
SOME UNCERTAINTY REMAINS REGARDING THE START OF NEXT WEEK. A  
COASTAL STORM MOVING NORTH ALONG THE SOUTHEAST AND MID ATLANTIC  
COASTS WILL MAKE ITS WAY TOWARDS SOUTHERN NEW ENGLAND SOMETIME  
EARLY MONDAY/LATE SUNDAY. SIMULTANEOUSLY, STRONG HIGH PRESSURE  
IS EXPECTED TO BE SETTLED OVER PARTS OF THE CANADIAN MARITIMES,  
QUEBEC AND MAINE. THE PRESSURE GRADIENT BETWEEN THIS HIGH AND  
THE COASTAL STORM TO THE SOUTH WILL BE CONDUCIVE TO STRONG,  
GUSTY NORTHEAST WINDS AND ROUGHER SEAS. DEPENDING ON HOW FAR  
NORTH IT TRACKS, WE MAY ALSO SEE SOME MORE RAIN. GLOBAL GUIDANCE  
HAS STARTED TO FIND SOME AGREEMENT REGARDING RAINFALL OVER THE  
REGION, THOUGH TOTALS ARE STILL TO BE DETERMINED. THE GREATEST  
CHANCES FOR RAIN REMAIN OVER THE SOUTH COAST AND ISLANDS.  
CONFIDENCE REMAINS LOW REGARDING HOW QUICKLY THIS LOW WILL EXIT  
THE REGION: CANADIAN MODEL GUIDANCE (BOTH ENSEMBLE AND  
DETERMINISTIC) HAS IT STALLING OVER THE WATERS TO OUR SOUTH,  
WHICH WOULD BE MORE OF A WORST-CASE SCENARIO. SEAS WOULD  
CONTINUE TO BUILD AFTER THE KING TIDES HAVE PASSED AND THE RISK  
FOR COASTAL EROSION AND FLOODING WOULD INCREASE, THOUGH THIS  
RISK DOES REMAIN MINOR AT THIS TIME. GFS GUIDANCE REMAINS  
PROGRESSIVE, KICKING THE STORM OUT TO SEA BY TUESDAY, AND ECMWF  
GUIDANCE FALLS SOMEWHAT BETWEEN THESE TWO SCENARIOS. ONCE THIS  
STORM MAKES ITS EXIT, WINDS WILL SLACKEN AS THE GRADIENT WEAKENS  
AND SEAS WILL DECREASE. THE TRACK OF THIS SYSTEM SHOULD BECOME  
CLEARER AS WE GET CLOSER TO THIS PERIOD.  
 

 
   
AVIATION /12Z THURSDAY THROUGH MONDAY/
 
 
FORECASTER CONFIDENCE LEVELS...  
 
LOW - LESS THAN 30 PERCENT.  
MODERATE - 30 TO 60 PERCENT.  
HIGH - GREATER THAN 60 PERCENT.  
 
12Z UPDATE: FORECAST REMAINS ON TRACK WITH GUSTY WINDS STARTING  
TO RAMP UP THIS MORNING. STRONGEST WIND GUSTS LIKELY TO BE THE  
COASTAL REGION AND EASTERN SHORE OF MA.  
 
TODAY...HIGH CONFIDENCE.  
 
VFR. NW WINDS 8-12 KTS WITH GUSTS 20 KNOTS. GUSTS OF 20 TO  
30 KNOTS TOWARD THE CAPE AND NANTUCKET.  
 
TONIGHT AND FRIDAY...HIGH CONFIDENCE.  
 
VFR. WINDS DIMINISH GREATLY WITH GUSTS FALLING OFF A LITTLE  
BEFORE 00Z AND SUSTAINED WINDS BECOMING LIGHT TO CALM. LIGHT  
SW WINDS DEVELOP FRIDAY AFTERNOON.  
 
KBOS TERMINAL...HIGH CONFIDENCE IN TAF.  
 
VFR. GUSTY NW WINDS AROUND 25 KNOTS THIS MORNING, WITH GUSTS  
EASING AROUND 20 KNOTS THIS AFTERNOON. GUSTS END AND WINDS EASE  
OVERNIGHT WITH NW WIND LESS THAN 5 KNOTS.  
 
KBDL TERMINAL...HIGH CONFIDENCE IN TAF.  
 
VFR. GUSTY NW WIND AROUND 20 KNOTS THROUGH MIDAFTERNOON, THEN  
WIND BECOMES LIGHT TO CALM OVERNIGHT.  
 
OUTLOOK /FRIDAY NIGHT THROUGH MONDAY/...  
 
FRIDAY NIGHT THROUGH SATURDAY: VFR.  
 
SATURDAY NIGHT: VFR. BREEZY. SLIGHT CHANCE SHRA.  
 
SUNDAY: VFR. WINDY WITH GUSTS UP TO 35 KT. CHANCE SHRA.  
 
SUNDAY NIGHT: MAINLY MVFR, WITH LOCAL IFR POSSIBLE. STRONG  
WINDS WITH LOCAL GUSTS UP TO 40 KT. SHRA LIKELY.  
 
COLUMBUS DAY: MAINLY MVFR, WITH LOCAL IFR POSSIBLE. STRONG  
WINDS WITH AREAS OF GUSTS UP TO 45 KT. SHRA LIKELY.  
 

 
   
MARINE
 
 
FORECASTER CONFIDENCE LEVELS...  
 
LOW - LESS THAN 30 PERCENT.  
MEDIUM - 30 TO 60 PERCENT.  
HIGH - GREATER THAN 60 PERCENT.  
 
THROUGH FRIDAY... HIGH CONFIDENCE.  
 
GUSTY NORTH-NORTHWEST WINDS AND ROUGH SEAS FOR OCEAN WATERS  
WILL LEAD TO CONTINUED SMALL CRAFT ADVISORIES. WILL HAVE  
IMPROVING CONDITIONS THIS AFTERNOON WITH EASING WINDS AND  
SUBSIDING SEAS. HIGH PRESSURE SETTLES OVER THE WATERS TONIGHT  
INTO FRIDAY.  
 
OUTLOOK /FRIDAY NIGHT THROUGH MONDAY/...  
 
FRIDAY NIGHT THROUGH SATURDAY: WINDS LESS THAN 25 KT.  
 
SATURDAY NIGHT: WINDS LESS THAN 25 KT. SEAS LOCALLY APPROACHING  
5 FT. CHANCE OF RAIN SHOWERS.  
 
SUNDAY: LOW RISK FOR GALE FORCE WINDS WITH GUSTS UP TO 45 KT.  
AREAS OF ROUGH SEAS. CHANCE OF RAIN SHOWERS.  
 
SUNDAY NIGHT: GALE FORCE WINDS WITH GUSTS UP TO 45 KT. ROUGH  
SEAS UP TO 20 FT. RAIN SHOWERS LIKELY, SLIGHT CHANCE OF  
THUNDERSTORMS.  
 
COLUMBUS DAY: GALE FORCE WINDS WITH GUSTS UP TO 45 KT. ROUGH  
SEAS UP TO 21 FT. RAIN SHOWERS LIKELY, SLIGHT CHANCE OF  
THUNDERSTORMS. LOCAL VISIBILITY 1 TO 3 NM.  
 

 
   
BOX WATCHES/WARNINGS/ADVISORIES
 
 
CT...FREEZE WARNING FROM 11 PM THIS EVENING TO 9 AM EDT FRIDAY FOR  
CTZ002>004.  
MA...FREEZE WARNING FROM 11 PM THIS EVENING TO 9 AM EDT FRIDAY FOR  
MAZ005-006-009>014-017-018-020-021.  
FROST ADVISORY FROM 11 PM THIS EVENING TO 9 AM EDT FRIDAY FOR  
MAZ007-015-016-019-023.  
RI...FREEZE WARNING FROM 11 PM THIS EVENING TO 9 AM EDT FRIDAY FOR  
RIZ001-003-006.  
FROST ADVISORY FROM 11 PM THIS EVENING TO 9 AM EDT FRIDAY FOR  
RIZ002-004-005-007.  
MARINE...SMALL CRAFT ADVISORY UNTIL 10 AM EDT THIS MORNING FOR ANZ230.  
SMALL CRAFT ADVISORY UNTIL 4 PM EDT THIS AFTERNOON FOR  
ANZ231>234-251-256.  
SMALL CRAFT ADVISORY UNTIL 1 PM EDT THIS AFTERNOON FOR ANZ235-  
237.  
SMALL CRAFT ADVISORY UNTIL 10 PM EDT THIS EVENING FOR ANZ250-  
255.  
SMALL CRAFT ADVISORY UNTIL 1 AM EDT FRIDAY FOR ANZ254.  
 

 
 

 
 
SYNOPSIS...BELK/HRENCECIN  
NEAR TERM...BELK  
SHORT TERM...BELK  
LONG TERM...BELK/HRENCECIN  
AVIATION...BELK/DOOLEY  
MARINE...BELK/HRENCECIN  
 
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