902  
FXUS61 KGYX 150628  
AFDGYX  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE GRAY ME  
228 AM EDT SUN SEP 15 2019  
   
SYNOPSIS
 
 
A FRONTAL SYSTEM WILL SLIDE WELL OFFSHORE THIS MORNING FOLLOWED  
BY A WEAK AREA OF HIGH PRESSURE. AN AREA OF LOW PRESSURE PASSES SOUTH  
OF THE REGION TONIGHT INTO MONDAY AND WILL BRUSH FAR SOUTHERN NEW  
HAMPSHIRE AND SOUTHWEST MAINE WITH A FEW SHOWERS. ONCE THE LOW  
MOVES EAST OF THE REGION MONDAY MORNING, HIGH PRESSURE WILL  
DOMINATE THE WEATHER THROUGH MUCH OF THE COMING WEEK WITH SEASONABLE  
TO ABOVE AVERAGE TEMPERATURES.  
 

 
   
NEAR TERM /THROUGH TODAY/
 
 
GOES WATER VAPOR IMAGERY SHOWED AN IMPULSE OVER WESTERN QUEBEC  
AT 06Z WITH AN ASSOCIATED COLD FRONT CROSSING THE AREA AT  
MOMENT. SKIES WERE PARTLY CLOUDY AT THE MOMENT WITH SOME AREAS  
OF FOG DEVELOPING. THE FRONT SHOULD CLEAR THE COAST BY DAWN WITH  
ANY RESIDUAL FOG QUICKLY BURNING OFF. WE'LL SEE A WARM DAY WITH  
SUNSHINE FADING DURING THE AFTERNOON AHEAD OF THE NEXT IMPULSE  
AND ASSOCIATED WEAK SURFACE SYSTEM APPROACHING FROM THE LOWER  
GREAT LAKES. HIGHS TODAY WILL BE IN THE LOWER AND MID 70S WITH  
60S FOR MOUNTAIN SECTIONS.  
 

 
   
SHORT TERM /TONIGHT THROUGH 6 PM MONDAY/
 
 
THE SHORT WAVE AND WEAK SURFACE SYSTEM CROSS THE AREA LATE  
TONIGHT AND EARLY MONDAY WITH MUCH OF THE CLOUD COVER AND SHOWER  
POTENTIAL LIMITED TO SOUTHERN SECTIONS OF NEW HAMPSHIRE AND  
ADJACENT SOUTHWEST MAINE. LOWS TONIGHT WITH RANGE FROM THE 40S  
ACROSS THE MOUNTAINS TO LOWER AND MID 50S ELSEWHERE. ON  
MONDAY...CLOUDS AND SHOWERS EXIT SOUTHERN SECTIONS DURING THE  
MORNING. HOWEVER...BY AFTERNOON A WEAK TROUGH DROPPING SOUTH  
INTO THE REGION WILL PRODUCE A FEW CLOUDS ACROSS OUR NORTHERN  
AND EASTERN MAINE ZONES. HIGHS TOMORROW WILL RANGE FROM 60S IN  
THE MOUNTAINS TO NEAR 70 ELSEWHERE.  
 

 
   
LONG TERM /MONDAY NIGHT THROUGH SATURDAY/
 
 
00Z MODEL SUITE IN RELATIVELY GOOD AGREEMENT, DEPICTING A  
RELATIVELY DRY WEEK AHEAD WITH A LARGE ANTICYCLONE BUILDING OVER  
THE REGION.  
 
COLD AIR ADVECTION WILL INCREASE MONDAY NIGHT AS A TROUGH OF LOW  
PRESSURE EXITS THROUGH THE CANADIAN MARITIMES. A LARGE HIGH  
PRESSURE SYSTEM AT THE SURFACE WILL CONTINUE TO BUILD OVER NEW  
ENGLAND ON TUESDAY. GOOD MIXING MAY ALLOW FOR GUSTY WINDS AT  
TIMES. WITH H8 TEMPERATURES BETWEEN +2C AND +6C, AFTERNOON HIGHS  
WILL LIKELY ONLY BE IN THE 60S FOR BOTH TUESDAY AND WEDNESDAY.  
 
THE SLOW MOVING ANTICYCLONE WILL CREST OVER THE FORECAST AREA ON  
THURSDAY, ALLOWING FOR A WARMING TREND TO BEGIN. BY FRIDAY,  
TEMPERATURES WILL BE ABOVE NORMAL IN ALL AREAS WITH MOSTLY 70S  
OVER THE REGION WHICH WILL CONTINUE INTO NEXT WEEKEND.  
 
PATCHY LATE NIGHT FOG WILL OCCUR THROUGH MUCH OF THE WEEK OVER  
THE INLAND, SHELTERED VALLEYS.  
 

 
   
AVIATION /06Z SUNDAY THROUGH THURSDAY/
 
 
SHORT TERM /THROUGH MONDAY/...AREAS OF IFR/LIFR THROUGH 12Z IN  
STRATUS AND FOG THEN IMPROVING TO VFR THROUGHOUT. LCL IFR PSB  
TONIGHT IN MTN VALLEY STRATUS AND FOG BTW 06 AND 12Z MONDAY. SCT  
MVFR PSB NR THE NH BORDER BTW 10 AND 14Z MONDAY -SHRA.  
 
LONG TERM...MAINLY VFR CONDITIONS THROUGH NEXT WEEK. PATCHY LATE  
NIGHT FOG IS POSSIBLE BEGINNING TUESDAY NIGHT FOR THE INTERIOR  
SHELTERED VALLEYS.  
 

 
   
MARINE
 
 
SHORT TERM /THROUGH MONDAY/...WINDS AND SEAS HAVE DROPPED OFF  
AHEAD OF THE COLD FRONT AND I EXPECT WE'LL SEE CONDITIONS REMAIN  
BELOW SCA FOR THE REMAINDER OF THE PERIOD.  
 
LONG TERM...WINDS AND SEAS WILL LIKELY REMAIN BELOW SCA  
THRESHOLDS THROUGH THE UPCOMING WEEK. HOWEVER, THERE MAY BE SOME  
LOCALLY GUSTY WINDS FROM THE NORTH MONDAY NIGHT INTO TUESDAY AS  
COLD AIR ADVECTION DEVELOPS OVER THE WATERS. LONG PERIOD SWELLS  
ARE POSSIBLE FROM HUMBERTO LATE IN THE WEEK AS WELL.  
 

 
   
GYX WATCHES/WARNINGS/ADVISORIES
 
 
ME...NONE.  
NH...NONE.  
MARINE...NONE.  
 

 
 

 
NEAR TERM...SCHWIBS  
SHORT TERM...SCHWIBS  
LONG TERM...CANNON  
 
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