Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 022212 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 612 PM EDT WED SEP 2 2015 .SYNOPSIS... A WEAK CANADIAN COLD FRONT WILL SLOWLY MOVE SOUTH THROUGH THE REGION TONIGHT AND THURSDAY. HIGH PRESSURE WILL BUILD SOUTH FROM CANADA THURSDAY NIGHT THROUGH FRIDAY. HIGH PRESSURE WILL CREST OVER THE AREA FRIDAY NIGHT AND WILL PUSH SOUTH OFF THE COAST ON SATURDAY. HIGH PRESSURE WILL HOLD SOUTH OF NEW ENGLAND SUNDAY THROUGH TUESDAY. && .NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
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610 PM...HAVE UPDATED POPS OVERNIGHT A BIT...KEEPING SLT CHC IN FAR NRN ZONES THIS EVE...AS REMNANT CONVECTION MAY MAKE IT INTO THE N BEFORE DYING. ALSO...BACKED OFF CHC POPS TO THE WEST UNTIL AFTER SUNRISE...MOSTLY BASED ON MESOSCALE MODEL CONSENSUS...ALTHOUGH CERTAINLY COULD NOT RULE OUT A SHOWER FROM THE WHITES NWD DURING THE PRE-DAWN. ALSO MODIFIED T/TD A BIT OVERNIGHT...MOSTLY BASED ON CURRENT OBS. THE COLD FRONT MAY SLIDE INTO FAR NE ZONES BY DAYBREAK...MAINLY ALONG THE INTL BORDER IN FRANKLIN SOMERSET CTYS. PREVIOUSLY...THE CLEAR SKIES WILL SLOWLY GIVE WAY TO INCREASING MID/HIGH LEVEL MOISTURE BY LATER TONIGHT AHEAD OF THE NEXT SYSTEM. AREAS OF VALLEY FOG POSSIBLE IN THE CONNECTICUT AND MERRIMACK RIVER VALLEYS LATER TONIGHT. TEMPERATURES WILL REMAIN MILD TONIGHT DUE TO DEVELOPING CLOUD COVER.
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&& .SHORT TERM /6 AM THURSDAY MORNING THROUGH THURSDAY NIGHT/... A WEAK CANADIAN COLD FRONT WILL MOVE SOUTH ACROSS THE REGION THURSDAY PRODUCING SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ALONG AND AHEAD OF ITS PASSAGE. ALL MODELS AGREE ON PUSHING FRONT SOUTH OF THE AREA BY THURSDAY EVENING BRINGING AN END TO ANY SHOWERS. CLEARING AND COOLER CONDITIONS ARE EXPECTED THURSDAY NIGHT BEHIND THE FRONTAL PASSAGE. USED A BLEND OF THE MODELS WHICH WERE ALL IN FAIRLY GOOD AGREEMENT. && .LONG TERM /FRIDAY THROUGH WEDNESDAY/... VERY QUIET PATTERN IN PLACE FOR THE LONG TERM. FRIDAY STARTS WITH HIGH PRESSURE FIRMLY IN PLACE OVER THE NORTHEAST. HIGH PRESSURE WILL MOVE EVER SO SLOWLY OFF THE COAST DURING THE WEEKEND AND THEN HOLD IN PLACE FOR THE REMAINDER OF THE FORECAST PERIOD. THE ONLY CHANCE FOR SOME PRECIPITATION LOOKS TO BE LATE TUESDAY AND TUESDAY NIGHT OVER THE MOUNTAINS. && .AVIATION /22Z WEDNESDAY THROUGH MONDAY/... SHORT TERM...VFR TONIGHT. CIGS/VSBYS MAY LOWER TO MVFR IN SCATTERED SHOWERS/THUNDERSTORMS THURSDAY. THURSDAY NIGHT VFR CONDITIONS. LONG TERM...PRIMARILY VFR THROUGHOUT THE PERIOD && .MARINE... SHORT TERM...WINDS AND SEAS REMAIN LIGHT TONIGHT AND THURSDAY...THURSDAY NIGHT WINDS AND SEAS WILL INCREASE BUT SHOULD REMAIN BELOW SCA CRITERIA. LONG TERM...NO FLAGS EXPECTED. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...NONE. && $$ SYNOPSIS... NEAR TERM...CEMPA/MARINE SHORT TERM... LONG TERM... AVIATION... MARINE...

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