648  
FXUS61 KGYX 021020  
AFDGYX  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE GRAY ME  
620 AM EDT SAT AUG 2 2025  
   
SYNOPSIS  
 
TEMPERATURES GRADUALLY CREEP UP THROUGH EARLY NEXT WEEK AS  
WINDS TURN WEST TO SOUTHWEST AHEAD OF AN APPROACHING FRONT.  
BEHIND THAT BOUNDARY, HIGH PRESSURE RETURNS AND ANOTHER STRETCH  
OF DRY AND SEASONABLE WEATHER IS ANTICIPATED.  
 
 
   
NEAR TERM /THROUGH TODAY/  
 
620 AM UPDATE...JUST MINOR CHANGES TO ALIGN THE NEAR TERM WITH  
OBSERVATIONS. PATCHY VALLEY FOG HAS DEVELOPED SIMILAR TO  
YESTERDAY, BUT NOT QUITE AS WIDESPREAD. THIS WILL CLEAR OVER THE  
NEXT COUPLE OF HOURS AS MIXING GETS GOING. OTHERWISE, THE GOING  
FORECAST IS ON TRACK WITH A CHILLY START TO THE MORNING,  
QUICKLY WARMING UNDER CLEAR SKIES.  
 
PREVIOUS DISCUSSION...  
IMPACTS AND KEY MESSAGES:  
* NO SIGNIFICANT WEATHER IMPACTS EXPECTED  
 
HIGH PRESSURE CONTINUES TO BUILD IN AT THE SURFACE TODAY WITH  
THE 500 MB TROUGH AXIS DEEPENING OFF TO OUR EAST. THIS WILL TURN  
UPPER LEVEL FLOW NORTHWESTERLY, INCREASING THE TRANSPORT OF  
COOL DRY AIR INTO THE REGION. AS A RESULT SKIES WILL BE CLEARER  
THROUGH THE DAY AND THE FULL SUNSHINE SHOULD HELP TEMPERATURES  
GET A FEW DEGREES WARMER THEN YESTERDAY. THERE IS A CHANCE WE  
SEE SOME CUMULUS FORM OFF THE TERRAIN, BUT IT WILL LIKELY STAY  
MORE CONFINED TO THE MOUNTAINS TODAY WITH CONTINUED DRYING OF  
THE AIRMASS. EXPECT HIGHS IN THE UPPER 70S TO AROUND 80 SOUTH OF  
THE MOUNTAINS, AND MORE IN THE LOW TO MID 70S TO THE NORTH.  
DEWPOINTS LIKELY DROP INTO THE 40S ACROSS THE AREA, YIELDING RH  
VALUES AROUND 35% DURING THE DAY. ANY LOCATIONS THAT HAVE BEEN  
MISSING OUT ON APPRECIABLE RAIN MAY BEGIN TO SEE THINGS GET  
QUITE DRY AS WE MOVE INTO AN EXTENDED PERIOD OF LITTLE TO NO  
PRECIPITATION.  
 
 
   
SHORT TERM /TONIGHT THROUGH SUNDAY/  
 
IMPACTS AND KEY MESSAGES:  
* WILDFIRE SMOKE IS EXPECTED TO MOVE BACK INTO THE REGION  
TONIGHT AND LAST THROUGH AT LEAST SUNDAY. PLEASE REFER TO NEW  
HAMPSHIRE DES AND MAINE DEP FORECAST PRODUCTS REGARDING  
POTENTIAL IMPACTS TO AIR QUALITY.  
 
TONIGHT: WELL THE COOL DRY AIR FROM CANADA HAS BEEN WELCOMED  
AFTER SOME HOT DAYS, WILDFIRE SMOKE WILL BEGIN TO GET  
TRANSPORTED INTO OUR REGION AS WELL BEGINNING TONIGHT. BECAUSE  
OF THIS, I DON'T ANTICIPATE THE "CLEAR" SKIES TO GIVE WAY TO AS  
EFFICIENT RADIATIONAL COOLING AS WE HAVE SEEN THE PAST TWO  
NIGHTS. IT WILL STILL BE A COOL NIGHT THOUGH, WITH TEMPERATURES  
SOUTH OF THE MOUNTAINS FALLING INTO THE LOW TO MID 50S, AND  
UPPER 40S TO LOW 50S TO THE NORTH. THIS MAY RESULT IN VALLEY FOG  
AGAIN TONIGHT.  
 
SUNDAY: ON SUNDAY THE HRRR SMOKE MODEL SUGGESTS THAT  
CONCENTRATIONS ACROSS THE NORTH COULD BE MODERATE. BUFKIT  
SOUNDINGS SUGGEST VERY EFFICIENT MIXING SO I WOULD EXPECT THAT  
IT WOULD BE NOTICEABLE UP THERE, ESPECIALLY TO FOLKS THAT MIGHT  
BE RECREATING IN THE HIGHER TERRAIN. FOR THIS REASON, I HAVE  
ADDED SMOKE TO THE NORTHERN TIER OF ZONES, WHILE KEEPING HAZE  
FOR LOCATIONS SOUTH OF THE MOUNTAINS AS CONCENTRATIONS WILL BE  
LOWER AND MORE ELEVATED (IN TERMS OF HEIGHT). SUNDAY WILL ALSO  
FEATURE OF A BREEZIER AFTERNOON IN WESTERN MAINE AS LOW PRESSURE  
PASSES TO OUR NORTH AND BRIEFLY TIGHTENS THE PRESSURE GRADIENT  
WITH HIGH PRESSURE SLIDING OFF TO OUR SOUTHEAST. SOUTHERLY WIND  
GUSTS AROUND 15-20 MPH ARE LIKELY AND WILL TAPER OFF HEADING  
INTO THE EVENING. HIGH TEMPERATURES SOUTH OF THE MOUNTAINS STILL  
CLIMB INTO THE LOW TO MID 80S SUNDAY DESPITE IT PROBABLY BEING  
MORE OF A FILTERED SUNSHINE. NORTH OF THE MOUNTAINS WHERE SKIES  
WILL BE SMOKEY LIKELY ONLY END UP IN THE UPPER 70S TO AROUND 80.  
 
 
   
LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/  
 
OVERNIGHT LONG TERM UPDATE...01Z NBM HAS BEEN INCORPORATED INTO  
THE GOING LONG TERM FORECAST AND OFFERS LITTLE CHANGE FROM THE  
PREVIOUS. GENERALLY QUIET WEATHER CONTINUES TO BE EXPECTED WITH  
TEMPERATURES PEAKING MONDAY. THE ONLY ISSUE IS THAT SMOKE FROM  
DISTANT WILDFIRES WILL MAKE FOR MILKY AND HAZY SKIES SUNDAY  
NIGHT AND MONDAY. A WEAK COLD FRONT SLOWLY SLIDES IN FROM THE  
NORTH MONDAY AND MAY ALLOW FOR ISOLD OR WIDELY SCT TSTMS IN THE  
MOUNTAINS. THESE MAY ALSO OCCUR ON TUE A BIT FARTHER SOUTH ON A  
LIMITED BASIS AS THE FRONT SLOWLY MOVES SOUTH. HOWEVER, MAINLY  
DRY WEATHER IS EXPECTED FROM MONDAY THROUGH MIDWEEK.  
 
PREVIOUSLY...  
 
KEY MESSAGE: LARGELY QUIET THRU THE EXTENDED WITH HIGH PRESSURE  
IN CONTROL.  
 
IMPACTS: SIGNIFICANT WEATHER IMPACTS ARE NOT ANTICIPATED. THERE  
MAY BE A WINDOW SUN INTO MON WHERE CANADIAN WILDFIRE SMOKE  
MAKES IT INTO NORTHERN NEW ENGLAND.  
 
FORECAST DETAILS: THE MAJORITY OF THE FOCUS IN THE EXTEND IS AT  
THE BEGINNING OF THE PERIOD AS A COLD FRONT PUSHES TOWARDS THE  
REGION. ABUNDANT CANADIAN WILDFIRE SMOKE IS EXPECTED TO BE  
COLLECTED BY THIS FRONT AS IT PUSHES SOUTHEAST. THE LONGER  
RANGES OF THE RRFS SHOW NEAR SURFACE SMOKE INCREASING IN THE  
MTNS SAT NIGHT AND CONTINUING THRU SUN INTO MON BEFORE  
DISPERSING BEHIND THE FRONT. I HAVE ADDED HAZE TO THE FORECAST  
GIVEN THE INHERENT UNCERTAINTY WITH SMOKE FORECASTS...BUT I  
WANTED TO GET AHEAD OF IT ON MESSAGING.  
 
OTHERWISE A SEASONABLY STRONG HIGH PRESSURE WILL DESCEND ON THE  
REGION MIDWEEK. I COULD SEE OVERNIGHT LOWS COOLING SOME FROM  
THE CURRENT FORECAST. WIDESPREAD LOWS IN THE 50S ARE  
LIKELY...AND SOME 40S ARE POSSIBLE IN THE NORTHERN VALLEYS.  
 
FOR THE REST OF THE FORECAST THE NBM GUIDANCE SEEMED  
REASONABLE.  
 
 
   
AVIATION /10Z SATURDAY THROUGH WEDNESDAY/  
 
SHORT TERM...LOCALLY DENSE VALLEY FOG WILL BE POSSIBLE AGAIN  
TONIGHT, BUT OUTSIDE OF THAT CEILINGS WILL REMAIN VFR THROUGH  
SUNDAY. VISIBILITIES AT NORTHERN TERMINALS MAY SEE MVFR  
REDUCTIONS SUNDAY AFTERNOON AS HIGHER CONCENTRATIONS OF WILDFIRE  
SMOKE ENTER THE AREA. SUNDAY AFTERNOON WILL ALSO FEATURE  
SOUTHERLY WIND GUSTS 15-20 KTS MAINLY AT MAINE TERMINALS AND  
PSM.  
 
LONG TERM...LARGELY VFR CONDITIONS EXPECTED IN THE EXTENDED.  
MIDWEEK A LARGELY HIGH PRESSURE SYSTEM MAY ALLOW FOR MORE  
WIDESPREAD VALLEY FOG AND LOCAL IFR OR LOWER CONDITIONS IN THE  
CT RIVER VALLEY.  
 
 
   
MARINE  
 
SHORT TERM...WIND GUSTS AND SEAS WILL REMAIN BELOW SCA CRITERIA  
THROUGH SUNDAY AS HIGH PRESSURE SLIDES OVER THE WATERS. WINDS  
SHIFT SOUTHERLY THIS AFTERNOON. SUNDAY AFTERNOON LOW PRESSURE  
PASSING TO THE NORTH OF THE REGION WILL LIKELY INCREASE  
SOUTHERLY WIND GUSTS AROUND 20KTS.  
 
LONG TERM...WINDS AND SEAS ARE EXPECTED TO REMAIN BELOW SCA  
THRESHOLDS. MIDWEEK HIGH PRESSURE WILL PROMOTE SEA BREEZES ON  
MOST DAYS.  
 
 
   
GYX WATCHES/WARNINGS/ADVISORIES  
 
ME...BEACH HAZARDS STATEMENT UNTIL 6 PM EDT THIS EVENING FOR MEZ027-  
028.  
NH...NONE.  
MARINE...NONE.  
 
 
 
 
 
NEAR/SHORT TERM...BARON  
LONG TERM...EKSTER/LEGRO  
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