Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 041034 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 634 AM EDT FRI SEP 4 2015 .SYNOPSIS... HIGH PRESSURE WILL BUILD SOUTH FROM CANADA THROUGH SATURDAY, THEN MOVE OFFSHORE SATURDAY NIGHT. THIS HIGH WILL PROVIDE THE REGION WITH A RESPITE IN THE HEAT AND HUMIDITY AT LEAST FOR A LITTLE WHILE. HOWEVER...THE HEAT AND HUMIDITY WILL RETURN SUNDAY AS THE HIGH ANCHORS OFF THE COAST. JULY-LIKE WEATHER IS EXPECTED MONDAY INTO WEDNESDAY. A SLOW-MOVING COLD FRONT WILL CROSS THE AREA THURSDAY INTO FRIDAY WITH SHOWERS AND THUNDERSTORMS. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... 627 AM...MINOR ESTF UPDATE TO REFLECT THE CURRENT MESONET IN FIRST PERIOD GRIDS. PREV DISC... HIGH PRESSURE WILL BUILD SOUTHWARD INTO MAINE AND NEW HAMPSHIRE TODAY PROVIDING THE REGION WITH COOLER AND DRIER WEATHER THAN WHAT WE EXPERIENCED THE LAST COUPLE OF DAYS. ANY EARLY MORNING CLOUDS AND ISOLATED SHOWERS SHOULD COME TO AN END BY 12Z THIS MORNING. THEREAFTER...PLENTY OF SUNSHINE IS EXPECTED WITH HIGHS IN THE 70S ALONG WITH DRY DEWPOINT VALUES. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SATURDAY/... HIGH PRESSURE WILL PARK OVERHEAD TONIGHT AND SATURDAY. GOOD RADIATIONAL COOLING CONDITIONS WILL BE PRESENT TONIGHT AND RESULT IN LOWS IN THE 40S AT LOCATIONS THAT NORMALLY RADIATE WELL. THIS WILL ALSO RESULT IN LOCALLY DENSE VALLEY FOG. SUNNY SKIES WILL BE THE RULE ON SATURDAY ALONG WITH TEMPERATURES AROUND 80 AT MOST LOCATIONS. && .LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/... THE MODELS ARE IN GENERAL AGREEMENT ON THE LONG WAVE PATTERN WELL INTO NEXT WEEK. RIDGING SURFACE AND ALOFT WILL PROVIDE THE FORECAST AREA WITH SUMMERTIME HEAT AND HUMIDITY THROUGH MID WEEK...BEFORE A SHORTWAVE IMPULSE DRIVES A STRONG COLD FRONT ACROSS THE REGION THURSDAY. COOLER AND DRIER AIR WILL GRADUALLY FILTER INTO THE AREA DURING FRIDAY AND THE UPCOMING WEEKEND. && .AVIATION /12Z FRIDAY THROUGH TUESDAY/... SHORT TERM...VFR CONDITIONS ARE EXPECTED TODAY THROUGH SATURDAY. HOWEVER...LOCAL IFR CONDITIONS IN RIVER VALLEY FOG WILL OCCUR IN RIVER VALLEYS LATE AT NIGHT FRIDAY NIGHT AND EARLY SATURDAY MORNING. LONG TERM... MON AM...LCL IFR PSBL IN VALLEY STRATUS AND FOG. TUE AM...LCL IFR PSBL IN VALLEY STRATUS AND FOG. && .MARINE... SHORT TERM...SCA FOR THE OCEAN WATERS FOR GUSTS UP TO 30 KT AND SEAS BUILDING TO AROUND 5 FT THIS MORNING. THESE WILL DIMINISH AFTER MID MORNING AS HIGH PRESSURE BEGINS TO CREST OVER THE REGION. NO FLAGS ARE ANTICIPATED TONIGHT THROUGH SATURDAY. LONG TERM... SUN...WINDS AND SEAS COULD APPROACH SMALL CRAFT OUTSIDE THE BAYS. MON - TUE...SMALL CRAFT WINDS AND SEAS ARE POSSIBLE. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...SMALL CRAFT ADVISORY UNTIL 10 AM EDT THIS MORNING FOR ANZ152- 154. && $$ ES

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