641  
FXUS61 KGYX 231026  
AFDGYX  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE GRAY ME  
626 AM EDT TUE MAY 23 2017  
   
SYNOPSIS
 
 
WEAK HIGH PRESSURE WILL BUILD SOUTH OF THE REGION TODAY AND WILL  
HOLD OVER THE REGION TONIGHT AND WEDNESDAY AS LOW PRESSURE  
PASSES WELL OFFSHORE. A COMPLEX AREA OF LOW PRESSURE WILL  
APPROACH FROM THE SOUTHWEST WEDNESDAY NIGHT AND THURSDAY AND  
WILL SLOWLY MOVE NORTHEAST THROUGH SOUTHERN NEW ENGLAND AND THE  
GULF OF MAINE THURSDAY NIGHT AND FRIDAY. HIGH PRESSURE WILL  
BUILD IN FROM THE WEST FRIDAY NIGHT AND SATURDAY. A COLD FRONT  
WILL DROP SOUTH THROUGH THE REGION SATURDAY NIGHT AND SUNDAY.  
 

 
   
NEAR TERM /UNTIL 6 PM THIS EVENING/
 
 
625 AM UPDATE...LOW CLOUDS AND FOG WILL BURN OFF EARLY THIS  
MORNING ALLOWING THE SUNSHINE TO RETURN. NO CHANGES TO THE  
FORECAST AT THIS TIME.  
 
LOW PRESSURE WILL DEPART OFF TO THE EAST EARLY ON TODAY. AS A  
WESTERLY FLOW DEVELOPS EARLY ON THIS MORNING, THE LOW CLOUDS,  
FOG, AND DRIZZLE WILL BE SHUNTED OFFSHORE. THE RESULT SHOULD BE  
A PARTLY SUNNY DAY WITH HIGHS IN THE 70S AT MOST LOCATIONS WITH  
LIGHT WINDS.  
 

 
   
SHORT TERM /6 PM THIS EVENING THROUGH 6 PM WEDNESDAY/
 
 
AS A SHORT WAVE TROUGH AMPLIFIES OVER THE LOWER OH VALLEY  
TONIGHT AND WEDNESDAY, DEEP LAYER RIDGING WILL DEVELOP OVER NEW  
ENGLAND. THIS SHOULD ALLOW FOR ANOTHER NICE DAY ON WEDNESDAY AS  
LOW PRESSURE PASSES WELL TO OUR SOUTH. IT MAY BE A BIT MORE  
CLOUDY, BUT HIGHS SHOULD REACH INTO THE 70S ONCE AGAIN.  
 

 
   
LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/
 
 
HIGH PRESSURE WILL HANG ON THROUGH WEDNESDAY NIGHT AS LOW PRESSURE  
OVER THE OHIO VALLEY SLOWLY BEGINS TO LIFT NORTHEAST. AFTER A  
PARTLY CLOUDY EVENING EXPECT HIGH AND MID LEVEL CLOUDS TO OVER-  
SPREAD THE REGION FROM THE WEST. LOW TEMPS WILL RANGE FROM THE  
MID 40S NORTH TO THE MID 50S SOUTH.  
 
COMPLEX AREA OF LOW PRESSURE WILL CONTINUE TO LIFT TOWARD NEW  
ENGLAND ON THURSDAY. BEST FORCING REMAINS SOUTH OF THE REGION  
THROUGH THE DAY ALONG A DEVELOPING WARM FRONT. WILL LIKELY STAY  
CLOSE TO SB NUMBERS FOR POPS BUT EXPECT ANY SHOWERS TO BE LIGHT  
AND SPOTTY. INCREASING ONSHORE FLOW WILL LIKELY BRING OCEAN  
STRATUS INTO THE PICTURE IN SOUTHERN ZONES DURING THE AFTERNOON  
AND EVENING. HIGH TEMPS AWAY FROM THE COAST SHOULD REACH THE  
MID TO UPPER 60S WITH UPPER 50S TO LOWER 60S ALONG THE COAST.  
 
LOW PRESSURE BECOMES VERTICALLY STACKED SOUTH OF NEW ENGLAND  
THURSDAY EVENING AND WILL SLOWLY DRIFT NORTHEAST OVERNIGHT.  
LOOKING FOR OCCASIONAL PERIODS OF RAIN OVERNIGHT BUT NOTHING  
TOO HEAVY. QPF WILL ONLY AMOUNT TO A QUARTER INCH OR LESS  
THROUGH DAYBREAK FRIDAY. LOWS OVERNIGHT WILL BE FAIRLY UNIFORM  
ACROSS THE FORECAST AREA WITH MOST LOCATIONS BOTTOMING IN THE  
LOWER TO MID 50S.  
 
LOW PRESSURE WILL MOVE NORTHEAST THROUGH THE GULF OF MAINE AND  
INTO THE MARITIMES ON FRIDAY. LOOKING FOR RAIN FOR MUCH OF THE  
DAY BEFORE PRECIPITATION TAPERS TO SHOWERS LATE FRIDAY AFTERNOON.  
MODELS IN FAIRLY GOOD AGREEMENT ON QPF WITH MOST AREAS PICKING  
UP A A HALF TO 1 INCH OF ACCUMULATION WITH SOME HIGHER AMOUNTS  
IN MID COAST MAINE. HIGHS ON FRIDAY WILL ONCE AGAIN RANGE THROUGH  
THE 60S WITH COOLEST READINGS ALONG THE COAST.  
 
LOW PRESSURE WILL PULL AWAY FROM THE REGION FRIDAY NIGHT AS A  
SHALLOW SURFACE RIDGE BUILDS IN FROM THE WEST. LOOKING FOR  
CLEARING SKIES DURING THE EVENING HOURS. LOWS OVERNIGHT WILL  
RANGE FROM THE MID 40S NORTH TO THE LOWER 50S SOUTH.  
 
HIGH PRESSURE WILL BUILD SOUTH OF THE REGION ON SATURDAY BRINGING  
A MIX OF SUN AND CLOUDS TO SOUTHERN AND CENTRAL ZONES. A BACKDOOR  
COLD FRONT SETTLING INTO NORTHERN MAINE WILL BRING INCREASING  
CLOUDS AND A CHANCE OF AFTERNOON SHOWERS TO NORTHERN ZONES. HIGHS  
ON SATURDAY WILL RANGE FROM THE MID 60S TO LOWER 70S.  
 
BACKDOOR FRONT WILL CONTINUE TO SETTLE SOUTH SATURDAY NIGHT AND  
SUNDAY. AFTER A CHANCE OF EVENING SHOWERS IN THE NORTH...NOT  
LOOKING FOR MUCH MORE THAN VARIABLE CLOUDS OVERNIGHT. LOWS WILL  
RANGE THROUGH THE 40S NORTH AND LOWER TO MID 50S SOUTH.  
 
FRONTAL BOUNDARY WILL STALL OVER SOUTHERN NEW ENGLAND ON SUNDAY  
AS HIGH PRESSURE BUILDS SOUTH FROM CANADA. THIS BOUNDARY MAY BE  
THE FOCUS FOR CLOUDS AND AFTERNOON SHOWERS IN SOUTHERN NEW  
HAMPSHIRE AND SOUTHWEST MAINE AS AN ONSHORE FLOW INCREASES NORTH  
OF THE FRONT. EXPECT HIGHS IN THE 60S TO NEAR 70 BUT DROPPING  
BACK INTO THE LOWER 60S ALONG THE COAST IN THE AFTERNOON.  
 

 
   
AVIATION /12Z TUESDAY THROUGH SATURDAY/
 
 
SHORT TERM...IFR CONDITIONS EARLY THIS MORNING SHOULD IMPROVE TO  
VFR BY AROUND 13Z. THESE VFR CONDITIONS SHOULD CONTINUE FOR MOST  
TERMINALS THROUGH WEDNESDAY.  
 
LONG TERM...  
VFR WEDNESDAY NIGHT AND THURSDAY. IFR/LIFR CEILINGS AND VSBY  
THURSDAY NIGHT AND FRIDAY...IMPROVING TO VFR FRIDAY NIGHT. VFR  
SATURDAY.  
 

 
   
MARINE
 
 
SHORT TERM...CONDITIONS SHOULD REMAIN BELOW SCA THRESHOLDS TODAY  
THROUGH WEDNESDAY.  
 
LONG TERM...  
SCA'S MAY BE NEEDED THURSDAY NIGHT THROUGH FRIDAY.  
 

 
   
FIRE WEATHER
 
 
WARMER AND DRIER WEATHER IS EXPECTED TODAY AND WEDNESDAY WITH RH  
VALUES GENERALLY IN THE 40S. RENEWED CHANCES FOR RAIN WILL  
ARRIVE FOR THURSDAY AND FRIDAY.  
 

 
   
TIDES/COASTAL FLOODING
 
 
HIGHEST ASTRONOMICAL TIDES OF THE SEASON WILL LIKELY RESULT IN  
SOME MINOR COASTAL FLOODING AT THE TIME OF HIGH TIDE THURSDAY  
NIGHT AND AGAIN ON FRIDAY NIGHT.  
 

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

 
 

 
 
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