472  
FXUS61 KGYX 181125  
AFDGYX  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE GRAY ME  
725 AM EDT WED JUL 18 2018  
   
SYNOPSIS
 
 
HIGH PRESSURE WILL BUILD INTO THE REGION FROM THE WEST TODAY  
THROUGH THURSDAY AND WILL HOLD OVER THE AREA THROUGH SATURDAY.  
A WARM FRONT WILL APPROACH FROM THE SOUTH SATURDAY NIGHT AND  
WILL LIFT NORTH THROUGH THE REGION ON SUNDAY. A MOIST AIR MASS  
WILL STREAM INTO THE REGION FOR MUCH OF THE UPCOMING WEEK WITH  
CHANCES FOR SHOWERS AND THUNDERSTORMS EACH DAY THROUGH MIDWEEK.  
 

 
   
NEAR TERM /UNTIL 6 PM THIS EVENING/
 
 
700 AM UPDATE...  
QUICK UPDATE TO MAINLY ADJUST AREA TEMPS/TD'S. HIGH AND MID  
LEVEL CLOUDS CONTINUE TO RACE OFF TO THE EAST THIS MORNING  
LEAVING JUST SCATTERED TO BROKEN LOW LEVEL CLOUDS IN THE  
MOUNTAINS. HIGH PRESSURE BUILDING IN FROM THE WEST SHOULD  
PROVIDE PLENTY OF SUN DOWNWIND OF THE MOUNTAINS AND DOWNSLOPING  
WINDS SHOULD QUICKLY BOOST TEMPS THROUGH THE MORNING HOURS. NO  
MAJOR CHANGES PLANNED TO CURRENT FORECAST ATTM.  
 
PREV DISC...  
COLD FRONT CURRENTLY PUSHING OFFSHORE EARLY THIS MORNING AS LAST  
REMAINING SHOWERS MOVE OFFSHORE WITH IT. INCREASING  
NORTHWESTERLY BOUNDARY LAYER FLOW BEGINNING TO DRY LOW LEVEL  
MOISTURE LINGERING IN SOUTHERN ZONES HOWEVER MID LEVEL CLOUDS  
WILL LIKELY TAKE THROUGH DAYBREAK TO CLEAR SOUTHERN ZONES.  
LOOKING FOR PATCHY FOG AND AREAS OF STRATUS IN AREAS THAT CLEAR  
BEFORE SUNRISE.  
 
A DRY DOWNSLOPING FLOW WITH PRODUCE A MOSTLY SUNNY DAY DOWNWIND  
OF THE MOUNTAINS AS HIGH PRESSURE BUILDS IN FROM THE WEST. HIGHS  
WILL RANGE FROM THE MID 70S NORTH TO THE MID 80S SOUTH WITH  
WARMEST READINGS AT THE COAST.  
 

 
   
SHORT TERM /6 PM THIS EVENING THROUGH 6 PM THURSDAY/
 
 
CLEAR SKIES AND LIGHT WINDS WILL ALLOW FOR GOOD RADIATIONAL  
COOLING OVERNIGHT WITH THE MOUNTAINS AND VALLEY LOCATIONS IN THE  
SOUTH RANGING THROUGH THE 40S. ELSEWHERE TEMPERATURES WILL  
BOTTOM OUT IN THE LOWER TO MID 50S.  
 
THURSDAY LOOKING STELLAR WITH SEASONABLE TEMPERATURES AND PLENTY  
OF SUN. HIGHS WILL RANGE FROM THE MID 70S TO LOWER 80S.  
 

 
   
LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/
 
 
VERY NICE WEATHER IS EXPECTED TO START THE EXTENDED PERIOD AS  
DEEP LAYER HIGH PRESSURE REMAINS OVERHEAD THROUGH SATURDAY.  
HOWEVER, THE PATTERN BEGINS TO CHANGE AS WE HEAD INTO SATURDAY  
NIGHT AND SUNDAY. UPPER LEVEL LOW PRESSURE OVER THE GREAT LAKES  
WILL WORK IN TANDEM WITH HIGH PRESSURE WELL OFFSHORE TO ALLOW  
THE MEAN FLOW TO BECOME MORE MERIDIONAL SUNDAY THROUGH AT LEAST  
MIDWEEK. THIS WILL ALLOW A VERY MOIST AIR MASS TO STREAM  
NORTHWARD INTO NORTHERN NEW ENGLAND WITH HIGH PWATS BEING THE  
NORM. VARIOUS 00Z DETERMINISTIC MODELS AND LATEST ENSEMBLE  
INFORMATION SUPPORT THE PATTERN. THIS SETUP SHOULD ALLOW FOR  
SHOWER AND THUNDERSTORM ACTIVITY FROM SUNDAY RIGHT THROUGH  
MIDWEEK...ESPECIALLY DURING THE DAY WHEN DIURNAL HEATING OCCURS.  
WITH HIGH PWATS IN PLACE, TORRENTIAL DOWNPOURS WILL BE POSSIBLE  
FROM TIME TO TIME WITH A LOW RISK OF LOCALIZED FLASH FLOODING.  
THE FIRST STOUT SHORT WAVE TROUGH EMBEDDED WITHIN THE MERIDIONAL  
FLOW LOOKS TO ARRIVE ON SUNDAY, AND THEREFORE RELATIVELY HIGH  
POPS ARE IN PLACE DURING THE DAY.  
 

 
   
AVIATION /12Z WEDNESDAY THROUGH SUNDAY/
 
 
SHORT TERM...AREAS OF MVFR/IFR CEILINGS AND VSBY IN EARLY MORNING  
VALLEY FOG....BECOMING VFR. VFR TONIGHT THROUGH THURSDAY.  
 
LONG TERM...VFR CONDITIONS THURSDAY NIGHT THROUGH SATURDAY.  
THEREAFTER, A MORE MOIST AIR MASS WILL MOVE INTO NORTHERN NEW  
ENGLAND. THEREFORE, INCREASING CHANCES OF LOWER CONDITIONS IN  
LOW CLOUDS, SOME FOG, AND SHOWERS WILL EXIST FROM LATER SATURDAY  
NIGHT THROUGH MIDWEEK.  
 

 
   
MARINE
 
 
SHORT TERM...NO FLAGS.  
 
LONG TERM...SCA CONDITIONS WILL POSSIBLY DEVELOP DURING THE  
WEEKEND AND LAST INTO MIDWEEK.  
 

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

 
 

 
 
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