Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 230637 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 237 AM EDT TUE SEP 23 2014 .SYNOPSIS...
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COOL AND DRY CANADIAN HIGH PRESSURE WILL MOVE OVERHEAD TODAY AND WEDNESDAY. HIGH PRESSURE WILL CONTINUE TO BUILD AND REMAIN OVER THE REGION LATE IN THE WEEK AND THROUGH THE WEEKEND WITH A SIGNIFICANT WARMING TREND EXPECTED AND COOL CLEAR NIGHTS THROUGH AT LEAST MONDAY.
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&& .NEAR TERM /UNTIL 6 PM TODAY/...
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AT 06Z...UPPER TROUGH AND UPSLOPE WAS PRODUCING A FEW MOUNTAIN CLOUDS ALONG WITH WIDELY SCATTERED RAIN OR SNOW SHOWERS. OTHERWISE...SKIES WERE MAINLY CLEAR ACROSS THE FORECAST AREA. A WEAK IMPULSE AND ASSOCIATED SURFACE BOUNDARY VICINITY OF THE UPPER GREAT LAKES WILL RACE EAST-SOUTHEAST ACROSS THE AREA THIS AFTERNOON ALONG WITH A FEW CLOUDS AND ISOLATED SPRINKLES...OR FLURRIES ABOVE FIVE THOUSAND FEET. HIGHS TODAY WILL BE MAINLY IN THE 60S.
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&& .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM WEDNESDAY/...
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BUILDING SURFACE HIGH BRINGS CLEAR SKIES AND COOL TEMPERATURES TONIGHT...WITH LOWS RANGING FROM THE 30S ACROSS THE MOUNTAINS TO 40S AND LOW 50S ELSEWHERE. A SUNNY DAY ON WEDNESDAY AS THE HIGH CRESTS ACROSS THE REGION WITH HIGHS IN THE 60S.
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&& .LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/...
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00Z MODEL SUITE CONTINUES TO SHOW THE LARGE RIDGE OF HIGH PRESSURE THAT IS CURRENTLY BUILDING OVER NEW ENGLAND EARLY THIS WEEK...TO REMAIN IN PLACE FOR A CONSIDERABLE PERIOD. THE ONLY FLY IN THE OINTMENT WILL BE DURING THE MID TO LATE WEEK PERIOD. MODELS ARE NOW SHOWING LOW PRESSURE DEVELOPING ALONG THE MID ATLANTIC COASTLINE BY THURSDAY. FOR NOW...IT APPEARS THAT THE STRONG RIDGE IN PLACE OVER NEW ENGLAND WILL KEEP ANY LIGHT PRECIPITATION OR COASTAL DRIZZLE TO OUR SOUTH WHERE AN INCREASING ONSHORE FLOW WILL DEVELOP. HOWEVER...EACH SUBSEQUENT MODEL RUN CONTINUES TO BE FURTHER NORTH WITH THIS SYSTEM...SO THIS WILL NEED TO BE MONITORED CLOSELY. FOR NOW...IT APPEARS JUST SOME CLOUDINESS MAY ENTER SOUTHERN PORTIONS OF THE FORECAST AREA THURSDAY INTO FRIDAY. TEMPERATURES WILL MODERATE WITH TIME. EXPECT WIDESPREAD 70S DURING THE DAY BY THE FRIDAY THROUGH SUNDAY TIME PERIOD. HIGH PRESSURE OVER THE GREAT LAKES WILL REASSERT ITSELF FOR THE WEEKEND. THEREAFTER...A BACKDOOR COLD FRONT MAY CROSS THE REGION EARLY NEXT WEEK.
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&& .AVIATION /06Z TUESDAY THROUGH SATURDAY/...
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SHORT TERM...VFR EXPECTED. LONG TERM...HIGH PRESSURE WILL REMAIN ANCHORED OVER THE REGION DURING THE LONG TERM. THIS WILL ALLOW FOR MOSTLY VFR CONDITIONS...HOWEVER PATCHY DENSE LATE NIGHT FOG MAY ALLOW FOR ISOLD LIFR CONDITIONS ACROSS SOME OF THE INTERIOR VALLEYS...ESPECIALLY AT LEB AND HIE.
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&& .MARINE...
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SHORT TERM...MARGINAL SEAS AND A FEW GUSTS TO NR 25 KT EARLY...OTHERWISE WINDS AND SEAS SHOULD BE BELOW SCA THRESHOLD. LONG TERM...WINDS AND SEAS WILL REMAIN BELOW SCA LEVELS.
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&& .GYX WATCHES/WARNINGS/ADVISORIES...
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ME...NONE. NH...NONE. MARINE...SMALL CRAFT ADVISORY UNTIL 10 AM EDT THIS MORNING FOR ANZ150>154.
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&& $$

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