Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 021849 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 249 PM EDT TUE SEP 2 2014 .SYNOPSIS... A COLD FRONT WILL CROSS THE REGION TONIGHT. HIGH PRESSURE WILL BUILD SOUTH OF THE REGION WEDNESDAY AND WILL PUSH OFF THE COAST SOUTH OF NEW ENGLAND ON THURSDAY. HIGH PRESSURE WILL HOLD OFF THE COAST THROUGH FRIDAY. A COLD FRONT WILL APPROACH FROM THE WEST FRIDAY NIGHT AND WILL STALL OFF THE COAST ON SATURDAY. HIGH PRESSURE WILL GRADUALLY BUILD IN FROM THE WEST SUNDAY THROUGH MONDAY. && .NEAR TERM /THROUGH TONIGHT/... WEAK PRE-FRONTAL TROUGH CURRENTLY KICKING OFF LINE OF CONVECTION ACROSS SOUTHERN NEW HAMPSHIRE EARLY THIS AFTERNOON AND EXPECT THIS AREA TO WEAKEN AS IT MOVES INTO MARINE LAYER IN SOUTHEAST NEW HAMPSHIRE AND SOUTHWEST MAINE. EXPECT SCATTERED CONVECTION TO CONTINUE POPPING UP IN HOT AND HUMID AIRMASS AS HEATING CONTINUES THIS AFTERNOON. NOT A LOT OF SHEAR AT THE MOMENT AND FREEZING LEVELS ARE QUITE HIGH SO NOT LOOKING FOR ANY WIDESPREAD SEVERE BUT SOME ISOLATED CELLS MAY PRODUCE BRIEF GUSTY WINDS APPROACHING SEVERE LIMITS. MAIN EVENT WILL COME LATER THIS EVENING AHEAD OF THE FRONT GENERALLY AFTER 00Z. ALTHOUGH LOSS OF HEATING WILL TEND TO WEAKEN CONVECTION AS IT MOVES THROUGH THIS EVENING...INCREASING SHEAR MAY CONTRIBUTE TO SOME BOWING LINE SEGMENTS WHICH MAY PRODUCE DAMAGING WINDS. MAIN AREA OF CONCERN WOULD BE SOUTHERN NEW HAMPSHIRE AND THE CONNECTICUT VALLEY. WILL LIKELY BE GETTING TOWARDS MIDNIGHT BEFORE CONVECTION MOVES INTO WESTERN AND CENTRAL MAINE. WILL SEE AREAS OF FOG DEVELOPING BEHIND THE FRONT BEFORE NORTHWEST GRADIENT TIGHTENS...CLEARING OUT MOST AREAS AROUND DAYBREAK. WILL BE A MILD NIGHT WITH LOWS RANGING THROUGH THE 60S. && .SHORT TERM /WEDNESDAY/... HIGH PRESSURE WILL BUILD IN FROM THE WEST THROUGH WEDNESDAY. LOOKING FOR A BREEZY AND WARM DAY WITH HIGHS FROM THE MID 70S TO THE MID 80S. UPSLOPE CLOUDS IN THE MOUNTAINS WILL GRADUALLY CLEAR DURING THE DAY AND THE REMAINDER OF THE AREA SHOULD SEE MOSTLY SUNNY SKIES. CLEAR AND COOL WEDNESDAY NIGHT AS HIGH PRESSURE CRESTS OVER THE AREA. COLDER MOUNTAIN VALLEYS WILL DIP INTO THE MID TO UPPER 40S WHILE THE REMAINDER OF THE FORECAST AREA DIPS INTO THE LOWER TO MID 50S. && .LONG TERM /WEDNESDAY NIGHT THROUGH TUESDAY/... HIGH PRES SETTLES OVER THE REGION THU BUT MOVES E ON FRI. COOLER AND DRIER WITH BE ASSOCIATED WITH THE HIGH UNTIL LATE FRI. ON FRI NIGHT AND SAT A RETURN WARMER SWLY FLOW DEVELOPS ONCE AGAIN WITH SCT SHWRS/TSTMS TO DEVELOP WELL IN ADVANCE OF AN APPROACHING COLD FRONT THAT WILL MOVE ACROSS THE REGION AND THEN OFF THE COAST BY SAT NIGHT. CANADIAN HIGH PRES BUILDS ACROSS NORTHERN ENW ENGLAND EARLY NEXT WEEK WITH COOLER AND DRIER AIR. OVERALL STAYED CLOSE TO THE SUPERBLEND MODEL FOR POPS, WX AND TEMPS. && .AVIATION /18Z TUESDAY THROUGH SUNDAY/... SHORT TERM...IFR/LIFR CEILINGS AND VSBY DEVELOPING THIS EVENING IN COASTAL AND SOUTHERN INTERIOR SECTIONS OF MAINE. AREAS OF VALLEY FOG ELSEWHERE AFTER MIDNIGHT. VFR WEDNESDAY AND WEDNESDAY NIGHT. LONG TERM...VFR THU AND FRI. BECOMING MVFR IN SCT SHWRS/TSTMS FRI NIGHT THRU EARLY SAT NIGHT. CONDS RETURN TO VFR SUN. && .MARINE... SHORT TERM...NO FLAGS. SCA`S MAY BE NEEDED ON WEDNESDAY. LONG TERM...A SCA MAY BE NEEDED SAT AHEAD OF THE APPROACHING COLD FRONT SATURDAY AS WINDS INCREASE FROM S-SW. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...NONE. && $$

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