Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 142038 AAA AFDGYX AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE GRAY ME 438 PM EDT FRI JUN 14 2013 .SYNOPSIS... A COLD FRONT WILL PUSH OFFSHORE THIS EVENING AND HIGH PRESSURE WILL BUILD IN FROM THE WEST OVERNIGHT AND SATURDAY. A WEAK COLD FRONT WILL DROP SOUTH INTO NORTHERN NEW ENGLAND SATURDAY NIGHT...STALLING OUT BY SUNDAY MORNING. AN AREA OF LOW PRESSURE WILL TRACK EAST ALONG THIS BOUNDARY ON SUNDAY AND WILL CONTINUE EAST INTO THE MARITIMES SUNDAY NIGHT. A COLD FRONT WILL APPROACH FROM THE NORTHWEST ON MONDAY AND WILL STALL OVER THE REGION ON TUESDAY AS LOW PRESSURE LIFTS NORTHEAST OUT OF THE OHIO VALLEY. LOW PRESSURE WILL MOVE EAST THROUGH SOUTHERN NEW ENGLAND TUESDAY NIGHT AND THEN HEAD INTO THE MARITIMES ON WEDNESDAY. HIGH PRESSURE WILL BUILD IN FROM THE WEST WEDNESDAY NIGHT AND WILL PUSH OFFSHORE ON THURSDAY. && .NEAR TERM /UNTIL 6 AM SATURDAY MORNING/...
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UPDATE...SOME MINOR CHANGES TO REFLECT CURRENT OBSERVATIONAL TRENDS. GIVEN STEEP LLVL LAPSE RATES...A FEW OF THE STRONGER SHRA/TSTMS COULD HAVE GUSTY WINDS. OTHERWISE...EXPECT THAT LOSS OF DIURNAL HEATING WILL BRING A QUICK END TO ANY PCPN. PREVIOUS DISCUSSION...A COLD FRONT WILL PUSH OFF THE COAST THIS EVENING. PRIOR TO PASSAGE...SCATTERED SHOWERS ARE EXPECTED. AN ISOLD THUNDERSTORM CANNOT BE RULED OUT EITHER. ANY SHOWER ACTIVITY SHOULD QUICKLY DISSIPATE OR MOVE OFFSHORE BY 00-01Z. THEREAFTER...CLEAR SKIES ARE EXPECTED. SOME OF THE BETTER RADIATORS MAY DROP TO AROUND 40 DEGREES IN THE FAR INTERIOR. HOWEVER...MOST PLACES WILL PROBABLY PICK UP A BIT OF A BREEZE AFTER MIDNIGHT AS THE GRADIENT TIGHTENS UP IN THE DEVELOPING CAA REGIME.
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&& .SHORT TERM /6 AM SATURDAY MORNING THROUGH SATURDAY NIGHT/... A VERY NICE DAY IS ON TAP FOR SATURDAY WITH PLENTY OF SUNSHINE...DRY RH LEVELS...AND TEMPS WELL INTO THE 70S. HOWEVER...WINDS WILL BE GUSTY...AROUND 25 MPH AT TIMES. ACROSS THE NORTHERN WHITES AND WESTERN MAINE MOUNTAINS...CLOUDS MAY INCREASE DURING THE AFTERNOON ALONG WITH A SLIGHT CHANCE OF A FEW RAIN SHOWERS AS A SHORT WAVE TROUGH PASSES BY TO THE NORTH...PUSHING A COLD FRONT INTO THE AREA. OTHER THAN SOME INCREASING HIGH CLOUDS SATURDAY NIGHT...AN UNEVENTFULLY FAIR NIGHT IS EXPECTED. && .LONG TERM /SUNDAY THROUGH FRIDAY/... WEAK BACKDOOR COLD FRONT WILL SAG SOUTH INTO THE REGION BY SUNDAY MORNING AND LOW PRESSURE APPROACH FROM THE WEST WILL TRACK EAST ALONG THIS BOUNDARY SUNDAY AFTERNOON. MORNING SUN WILL GIVE WAY TO INCREASING CLOUDS AND RAIN WILL QUICKLY OVERSPREAD THE REGION FROM WEST TO EAST IN THE AFTERNOON. NOT LOOKING FOR A WHOLE LOT IN THE WAY OF QPF AS MOST MODELS TAKING THE AXIS OF HEAVIEST PRECIP THROUGH SOUTHERN NEW ENGLAND. FAST UPPER FLOW WILL QUICKLY PUSH PRECIP THROUGH THE REGION BY SATURDAY EVENING AND WILL SEE PARTIAL CLEARING AFTER MIDNIGHT. WILL SEE A BRIEF BREAK IN THE ACTION ON MONDAY WITH A MIX OF SUN AND CLOUDS AND SEASONABLE TEMPS. COLD FRONT APPROACHING FROM THE NORTHWEST WILL BRING INCREASING CLOUDS AND A CHANCE OF SHOWERS OR THUNDERSTORMS LATE IN THE DAY IN THE NORTH. FRONT WILL GRADUALLY SAG SOUTH OVERNIGHT AND WILL REMAIN THE FOCUS FOR SHOWERS AND POSSIBLY AN ISOLATED THUNDERSTORM. LOW PRESSURE LIFTING NORTHEAST OUT OF THE OHIO VALLEY WILL TRACK NORTHEAST ALONG THIS BOUNDARY ON TUESDAY. EXPECT RAIN TO PUSH INTO SOUTHERN ZONES EARLY TUESDAY AFTERNOON AND WILL BECOME HEAVY AT TIMES IN THOSE AREAS BY TUESDAY EVENING AS FAIRLY INTENSE LOW PRESSURE FOR THIS TIME OF YEAR MOVES INTO THE DELAWARE BAY AREA. POTENTIAL WILL BE THERE FOR HEAVY RAINFALL ACROSS SOUTHERN NEW HAMPSHIRE AND MAINE AS STRONG DYNAMICS AND OVER-RUNNING SET UP THROUGH THE EVENING. EXPECT RAIN TO TAPER TO SHOWERS AFTER MIDNIGHT. LOW PRESSURE WILL QUICKLY SHIFT INTO THE MARITIMES ON WEDNESDAY AS HIGH PRESSURE BUILDS IN FROM THE WEST. WILL SEE CLEARING SKIES DURING THE MORNING WITH MOST AREAS BECOMING SUNNY BY AFTERNOON. HIGH PRESSURE WILL REMAIN IN CONTROL OVER THE NORTHEAST FOR THE REMAINDER OF THE WEEK WITH RETURN FLOW BRINGING WARM AND MUGGY WEATHER BACK INTO THE NORTHEAST ON FRIDAY. && .AVIATION /21Z FRIDAY THROUGH WEDNESDAY/... SHORT TERM...ASIDE FROM A FEW SHOWERS THROUGH 00Z THIS EVENING...VFR CONDITIONS ARE EXPECTED TONIGHT THROUGH SATURDAY NIGHT. NW WINDS WILL GUST 20-25 KT DURING THE DAY ON SATURDAY. LONG TERM...AREAS MVFR CEILINGS SUNDAY. VFR SUNDAY NIGHT THROUGH TUESDAY. IFR/LIFR CEILINGS VSBY DEVELOPING TUESDAY EVENING...THEN BECOMING VFR ON WEDNESDAY. && .MARINE... SHORT TERM...SUB-SCA CONDITIONS ARE EXPECTED TONIGHT THROUGH SATURDAY NIGHT. HOWEVER...NEAR-SHORE LOCATIONS MAY SEE MARGINAL SCA GUSTS SATURDAY. AT THIS TIME...MIXING OVER THE WATERS SEEMS TO MARGINAL FOR A SCA. LONG TERM...SCA`S LIKELY TUESDAY NIGHT INTO WEDNESDAY. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...NONE. && $$ NEAR TERM...LEGRO

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