Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 261843 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 243 PM EDT TUE AUG 26 2014 .SYNOPSIS... HIGH PRESSURE WILL REMAIN ANCHORED OFF THE SOUTHERN NEW ENGLAND COAST TODAY AND TONIGHT...WITH CONTINUES VERY WARM AND HUMID CONDITIONS. A COLD FRONT WILL DROP SOUTH THROUGH THE REGION ON WEDNESDAY AND COULD SET OFF SOME SHOWERS AND THUNDERSTORMS...BUT NOT BEFORE TEMPERATURES WARM TO NEAR 90 DEGREES AGAIN IN MANY SPOTS. COOLER HIGH PRESSURE WILL GRADUALLY BUILD IN FROM THE WEST THURSDAY AND FRIDAY AND SHIFT OFFSHORE ON SATURDAY. A WARM CROSSES THE AREA SATURDAY NIGHT INTO SUNDAY. && .NEAR TERM /THROUGH TONIGHT/... MORE PATCHY FOG TONIGHT FOR THE USUAL SUSPECT LOCATIONS...MAINLY OVER THE INTERIOR VALLEYS. OTHERWISE...CLOUDS ADVANCE TOWARDS NORTHERN AREAS LATE TONIGHT WITH APPROACHING COLD FRONT. && .SHORT TERM /WEDNESDAY AND WEDNESDAY NIGHT/... MODELS ARE IN GOOD AGREEMENT WITH THE PROGRESS AND TIMING OF THE FROPA ON WEDNESDAY. ATMOSPHERE BECOMES RELATIVELY UNSTABLE DURING THE AFTERNOON OVER SOUTHERN LOCATIONS WITH CAPE VALUES APPROACHING 1000 J/KG. HOWEVER...THIS FRONT WILL BE MOISTURE STARVED AND ANY PRECIP SHOULD BE WIDELY SCATTERED. THERE WILL BE ISOLATED CONVECTION NEAR THE COASTLINE EARLY WEDNESDAY EVENING BEFORE THE PRECIP HEADS OUT TO SEA. COOLER AND DRIER AIR TO FOLLOW LEADING INTO THE EXTENDED PORTION OF THE FORECAST. && .LONG TERM /WEDNESDAY NIGHT THROUGH TUESDAY/... A LARGE RIDGE OF CANADIAN HIGH PRES BUILDS ACROSS THE REGION THURSDAY AND FRIDAY. A FEW LINGERING SHOWERS MAY OCCUR IN THE MTNS ON THURSDAY DUE TO THE EXITING UPPER TROF ALOFT. TEMPS WILL BE QUITE COOL BUT SKIES WILL BE MOSTLY SUNNY AS NWLY DOWNSLOPING SFC WINDS OCCUR. THE SURFACE/UPPER RIDGE AXIS PROGRESSES EWD ON SAT AND SUNDAY ALLOWING A SWLY WAA PATTERN TO DEVELOP. THE AMS WILL GRADUALLY BECOME WARM HUMID AND UNSTABLE FOR THE REST OF THE WEEKEND AND INTO EARLY NEXT WEEK SO MAINLY DIURNAL SCT AFTN/EVENING SHWRS/TSTMS CAN BE EXPECTED. OVERALL USED THE SUPERBLEND MODEL WITH SOME POP ADJUSTMENTS OVER THE WEEKEND INTO NEXT WEEK. && .AVIATION /18Z TUESDAY THROUGH SUNDAY/... .SHORT TERM...AREAS OF FOG TONIGHT WILL MAKE FOR SOME IFR AND LIFR CONDITIONS THROUGH EARLY TOMORROW MORNING. ISOLD MVFR IN AFTERNOON THUNDERSTORMS ON WEDNESDAY. .LONG TERM...MAINLY VFR THROUGH LATE WEEK. SCT SHWRS OVER THE WEEKEND MAY LWR CONDS TO MVFR AT TIMES. && .MARINE... .SHORT TERM...LONG PERIOD SWELLS MIXED IN WITH WIND WAVES WILL MAKE FOR CHOPPY SURF CONDITIONS. SCA HAS BEEN ISSUED FOR A COMBINATION OF WINDS AND WAVES THROUGH WEDNESDAY FOR ALL AREAS EXCEPT CASCO BAY. .LONG TERM...WINDS AND SEAS WILL REMAIN BELOW SCA CRITERIA. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...SMALL CRAFT ADVISORY FROM 8 PM THIS EVENING TO 6 PM EDT WEDNESDAY FOR MEZ028. NH...NONE. MARINE...SMALL CRAFT ADVISORY FROM 8 PM THIS EVENING TO 6 PM EDT WEDNESDAY FOR ANZ150>152-154. && $$

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