Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 252238 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 638 PM EDT MON AUG 25 2014 .SYNOPSIS... HIGH PRESSURE WILL HOLD OVER THE NORTHEAST THROUGH TUESDAY. A COLD FRONT WILL MOVE IN FROM THE NORTHWEST ON WEDNESDAY...BRINGING A CHANCE OF SHOWERS OR THUNDERSTORMS...BUT NOT BEFORE WE SEE ANOTHER WARM AND HUMID DAY. HIGH PRESSURE WILL GRADUALLY BUILD IN FROM THE WEST THURSDAY AND FRIDAY...SHIFTING OFFSHORE BY SATURDAY. A WARM FRONT MOVES INTO THE AREA SATURDAY NIGHT...AND COULD STALL OVER THE REGION SUNDAY INTO MONDAY. && .NEAR TERM /UNTIL 6 AM TUESDAY MORNING/...
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UPDATED WITH NO REAL CHANGES TO THE PREVIOUS FCST. MAINLY CLEAR SKIES WILL CONTINUE OVERNIGHT WITH DEW POINT VALUES REMAINING IN THE LOWER 60S IN MANY AREAS. AREAS OF FOG WILL DEVELOP ONCE AGAIN...MOSTLY IN THE INTERIOR VALLEY LOCATIONS.
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&& .SHORT TERM /6 AM TUESDAY MORNING THROUGH TUESDAY NIGHT/... READINGS WILL SHOOT UP INTO THE LOWER TO MID 80S ONCE AGAIN UNDER SUNNY SKIES ON TUESDAY. 850 MB TEMPS WILL REACH +16C BY LATE IN THE DAY. THERE WILL BE A DEEP MIXING LAYER AND A SOUTHWEST GRADIENT INCREASING WITH TIME. THIS GRADIENT...ALONG WITH INCREASING CLOUDS OVER NORTHERN SECTIONS WILL LIMIT THE INLAND FOG TUESDAY NIGHT. && .LONG TERM /WEDNESDAY THROUGH MONDAY/...
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A ZONAL FLOW DEVELOPS WEDNESDAY AS THE UPPER RIDGE OVER THE NORTHEAST BECOMES FLATTENED AS A S/WV AND ACCOMPANIED COLD FRONT MOVES THROUGH THE RIDGE. A DOWNSLOPING FLOW AND WARM TEMPS ALOFT EXPECTED WED...TEMPS WILL BECOME VERY MILD AND MAY APPROACH 90 DEGS IN SOME AREAS. A FEW WDLY SCT SHWRS MAY ACCOMPANY THE FRONT. FOR THU AND FRI... A NWLY FLOW ALOFT WILL REDEVELOP LATER AS AN UPPER LOW ONCE AGAIN BECOMES ANCHORED IN THE MARITIMES. THIS WILL MEAN A RETURN TO COOLER TEMPS AND CONDITIONS WILL REMAIN DRY THU AND FRI. BY THE WEEKEND THE PATTERN BECOMES PROGRESSIVE AND A SW FLOW AT THE SURFACE AND ALOFT WILL ALLOW FOR WARMER AND MORE HUMID WEATHER WITH THE RISK OF SOME CONVECTION EACH DAY OVER THE WEEKEND AS A FRONTAL SYSTEM STALLS OVER THE AREA. STAYED CLOSE TO THE SUPERBLEND MODELING FOR POPS AND TEMPS.
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&& .AVIATION /00Z TUESDAY THROUGH SATURDAY/...
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.SHORT TERM /THROUGH TUESDAY NIGHT/...VFR THROUGH TUESDAY NOT... WITH AREAS OF IFR/LIFR CEILINGS AND VSBY IN LATE NOT AND EARLY MORNING VALLEY FOG TNGT AND POSSIBLY AGAIN TUESDAY NOT. LEB AND HIE AFFECTED THE MOST FOLLOWED BY CON. THE OTHER TAF SITES MAY SEE SOME LGT FOG WITH LESS OF AN IMPACT ON WIG/VSBY. .LONG TERM...MAINLY VFR CONDO.
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&& .MARINE...
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.SHORT TERM /TONIGHT THROUGH TUESDAY NIGHT/...UPDATED TO TWEAK WINDS AND SEAS OVERNIGHT PER LATEST BUOY REPORTS. WAVES WILL RUN IN THE 2 TO 4 FOOT RANGE OVER THE OPEN WATERS TNGT...IN PART DUE TO HIGHER PERIOD SWELLS OF 8 SECOND OR HIGHER. WINDS AND SEAS REMAIN BELOW SCA LEVELS THRU TUESDAY NOT...THOUGH SEAS MAY REACH MINIMAL SCA LEVELS OVER PARTS OF THE OUTER WATERS TUESDAY NOT. .LONG TERM... WINDS AND SEAS WILL REMAIN BELOW SCA CRITERIA.
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&& .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...NONE. && $$

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