693  
FXUS61 KCAR 111823  
AFDCAR  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE CARIBOU ME  
223 PM EDT THU SEP 11 2025  
   
SYNOPSIS
 
 
A COLD FRONT MOVES OFFSHORE THIS EVENING. HIGH PRESSURE BUILDS  
IN FOR FRIDAY AND FRIDAY NIGHT. LOW PRESSURE MOVES THROUGH  
SUNDAY, FOLLOWED BY HIGH PRESSURE MONDAY AND TUESDAY.  
 

 
   
NEAR TERM /THROUGH FRIDAY NIGHT/
 
 
REST OF THIS AFTERNOON...  
COOLER AIR BEGINNING TO MOVE IN FROM THE NORTHWEST THIS  
AFTERNOON. NOT REALLY A WELL DEFINED COLD FRONT, AS NORTHWEST  
WINDS HAVE TAKEN OVER ALL THE AREA DOWN TO THE COAST, BUT  
TEMPERATURES ARE STILL RISING AND DEWPOINTS ARE STEADY. IF YOU  
HAD TO CALL SOMETHING A COLD FRONT, WOULD CALL IT AS RUNNING  
FROM CARIBOU TO CLAYTON LAKE AS OF 2PM, MOVING SOUTH. THERE ARE  
ISOLATED SHOWERS ALONG THIS LINE ALONG WITH A BIT OF A DROP IN  
DEWPOINTS, DIMINISHING CLOUDS, AND BUMP IN SURFACE WINDS BEHIND  
THIS LINE DESPITE NO CHANGE IN WIND DIRECTION WITH WIND  
REMAINING FROM THE NORTHWEST. REGARDLESS, FRONT IS PRETTY WEAK  
WITH ISOLATED SHOWERS EXPECTED TO DISSIPATE LATER THIS  
AFTERNOON.  
 
TONIGHT...  
EXPECT THE CUMULUS FIELD TO DIMINISH AS THE SUN SETS WITH  
RAPIDLY INCREASING SUBSIDENCE AS HIGH PRESSURE BEGINS TO BUILD  
IN FROM THE W/NW, WITH CLEAR SKIES TONIGHT. DECENT COLD  
ADVECTION TONIGHT FROM THE NW. DON'T ANTICIPATE TOTAL  
DECOUPLING/MAX COOLING TONIGHT AS A PRESSURE GRADIENT REMAINS  
ESPECIALLY OVER EASTERN PORTIONS OF THE AREA, WITH 25-30 KTS  
JUST ABOUT 1500 FEET OFF THE GROUND. POSSIBLE EXCEPTION IS FAR  
WESTERN AREAS WHERE HIGH PRESSURE NOSES IN LATE. ISSUED FROST  
ADVISORY ONLY FOR NORTHERN SOMERSET WHICH HAS THE BEST SHOT AT A  
LIGHT FROST, WHILE AREAS FURTHER EAST SHOULD HAVE LESS  
DECOUPLING/COOLING AND THUS LITTLE IF ANY FROST. KEPT PATCHY  
RADIATION FOG IN THE FORECAST TONIGHT FOR WESTERN PORTIONS OF  
THE AREA, BUT GOT RID OF IT EVERYWHERE ELSE AS JUST DON'T  
ANTICIPATE A LOT OF DECOUPLING AND THUS RADIATION FOG THANKS TO  
THE PERSISTING PRESSURE GRADIENT.  
 
FRIDAY...  
SUNNY DAY WITH LIGHT NW WINDS. ENOUGH SUBSIDENCE THAT DON'T EVEN  
EXPECT A CUMULUS FIELD TO DEVELOP. HIGHS IN THE MID 60S TO LOW  
70S. DECREASED AFTERNOON DEWPOINTS A BIT FROM NBM DUE TO GOOD  
MIXING.  
 
FRIDAY NIGHT...  
HIGH PRESSURE OVER THE AREA IN THE EVENING, BEGINNING TO MOVE  
EAST LATE IN THE NIGHT. INCREASING HIGH CLOUDS WHICH SHOULD  
LIMIT FROST FORMATION. CAN'T TOTALLY RULE OUT FROST, BUT OPTED  
TO KEEP IT OUT OF THE FORECAST FOR NOW. PATCHY VALLEY FOG.  
 

 
   
SHORT TERM /SATURDAY THROUGH SUNDAY/
 
 
PARTLY TO MOSTLY SUNNY SKIES AND DRY WEATHER CAN BE EXPECTED ON  
SATURDAY AS HIGH PRESSURE CONTINUES TO DRIFT TO THE EAST. RETURN  
FLOW AROUND THE HIGH WILL RESULT IN AFTERNOON HIGHS NEAR  
NORMAL. THERE CONTINUES TO BE DIFFERENCES AMONGST THE  
DETERMINISTIC GUIDANCE AS WE HEAD INTO SATURDAY NIGHT AND  
SUNDAY. SOME OF THE GUIDANCE TAKE A 500 MB LOW RIGHT ACROSS THE  
REGION WHILE OTHER GUIDANCE KEEPS THE LOW LOW TO OUR NORTH WITH  
A MORE PROGRESSIVE UPPER TROF AND COLD FRONT CROSSING THE  
REGION. AT THIS POINT, MADE NO CHANGES TO THE NBM POPS FOR  
SATURDAY NIGHT AND SUNDAY.  
 

 
   
LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/
 
 
THE COLD FRONT MOVES EAST OF THE REGION WITH HIGH PRESSURE  
BUILDING IN ALONG WITH DECREASING CLOUDS FOR SUNDAY NIGHT.  
AFTERNOON HIGHS ON SUNDAY AGAIN WILL BE CLOSE TO NORMAL LEVELS  
FOR THIS TIME OF YEAR. MONDAY THROUGH WEDNESDAY LOOK DRY WITH  
HIGH PRESSURE REMAINING IN CONTROL. AFTERNOON HIGHS ON MONDAY  
WILL BE NEAR NORMAL AND THEN A BIT ABOVE NORMAL TUESDAY AND  
WEDNESDAY. THURSDAY LOOKS TO BE CONTINUED DRY WITH ABOVE NORMAL  
AFTERNOON HIGH TEMPERATURES EXPECTED.  
 

 
   
AVIATION /18Z THURSDAY THROUGH TUESDAY/
 
 
NEAR TERM:  
REST OF TODAY...  
VFR THE REST OF THE AFTERNOON AREAWIDE, AS INTERMITTENT  
BROKEN MVFR CEILINGS IN THE NORTH THIS MORNING HAVE LIFTED TO  
AROUND 5K AGL. BREEZY WITH N/NW WIND 10-15 KTS.  
 
TONIGHT...  
SURFACE WINDS DECREASE TONIGHT, BUT A DECENT N/NW WIND PERSISTS  
ALOFT, AND ADDED LLWS TO FVE/CAR/PQI/HUL WHERE WIND AROUND 1500  
FT AGL WILL BE CLOSE TO 30 KTS. VFR TONIGHT AREAWIDE.  
 
FRIDAY...  
REMAINING VFR AREAWIDE. LLWS DISSIPATES AT FVE/CAR/PQI/HUL  
AROUND 12Z AND WE ARE LEFT WITH AROUND A 5 KT SURFACE WIND FROM  
THE NW.  
 
FRIDAY NIGHT...  
VFR IN THE EVENING, BUT POSSIBLE IFR OR LOWER LATE IN THE NIGHT  
WITH PATCHY VALLEY FOG. BEST CHANCE IS PQI, HUL, AND BGR. LIGHT  
WINDS.  
 
SHORT TERM:  
 
SATURDAY THROUGH TUESDAY...  
MAINLY VFR THROUGH THE PERIOD. GUSTY NW SUN.  
 

 
   
MARINE
 
 
NEAR TERM: CONDITIONS BELOW SMALL CRAFT. NW WIND DOES INCREASE  
TO 10-15 KTS TONIGHT WITH SEAS BUILDING TO 4 FT AWAY FROM THE  
IMMEDIATE COAST, BUT THIS IS AS CLOSE TO SMALL CRAFT AS IT  
GETS.  
 
SHORT TERM: WINDS/SEAS WILL REMAIN BELOW SCA LEVELS THROUGH THE  
MIDDLE.  
 

 
   
CAR WATCHES/WARNINGS/ADVISORIES
 
 
ME...FROST ADVISORY FROM 2 AM TO 8 AM EDT FRIDAY FOR MEZ003.  
MARINE...NONE.  
 

 
 

 
 
NEAR TERM...FOISY  
SHORT TERM...TWD  
LONG TERM...TWD  
AVIATION...FOISY/TWD  
MARINE...FOISY/TWD  
 
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