Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 240811 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 411 AM EDT FRI MAY 24 2013 .SYNOPSIS...
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A COLD FRONT STALL ACROSS THE REGION TODAY AND LOW PRESSURE WILL DEVELOP ON THE FRONT SOUTH OF CAPE COD FRIDAY NIGHT AND CRAWL NORTHWARD ALONG THE FRONT THROUGH SATURDAY NIGHT. THIS WILL PRODUCE PERIODS OF RAIN ACROSS THE AREA RIGHT INTO SUNDAY. THE LOW TRACKS N OF THE AREA BY SUNDAY NIGHT WITH HIGH PRESSURE BUILDING IN FROM THE WEST FOR MEMORIAL DAY...WHICH LOOKS TO BE DRY WITH SOME SUNSHINE. HIGH PRESSURE MOVES ACROSS THE REGION TUESDAY...FOLLOWED BY A WARM FRONT APPROACHING FROM THE SOUTHWEST ON WEDNESDAY.
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&& .NEAR TERM /UNTIL 6 PM THIS EVENING/...
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HEAVIEST RAFL TO TRACK ACROSS THE CWA...ESPECIALLY COASTAL AREAS BETWEEN THE PRE-DAWN AND ABOUT MIDDAY. COULD SEE AROUND AN INCH OF QPF WITH LOCALLY HIGHER AMTS IN THIS TIME FRAME...AS WARM MOIST PLUME SQUEEZES IN AHEAD OF APPROACHING COLD FRONT FROM THE W. GOOD LOW-MID-LVL WINDS ACCOMPANY THE HIGH MOISTURE LEVELS...AND WITH WIND FLOW LINED UP VERTICALLY WILL HAVE TO WATCH FOR THE POSSIBILITY OF TRAINING AS WELL. BY AFTERNOON THE FRONT WILL BE BECOME MORE DIFFUSE...REMOVING THE LOW LVL FOCUS FOR SHRA...AND THE AIR WILL DRY SOMEWHAT. RAIN SHOULD CONTINUE...AT LEAST OCCNLY THROUGH THE DAY...BUT IT WILL BE LESS INTENSE DURING THE AFTERNOON. WILL ALSO SEE TEMPS START TO FALL BY MIDDAY.
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&& .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SATURDAY/...
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THE FRONT REMAINS STALLED...PROBABLY JUST OFFSHORE TONIGHT...AS 500 MB LOW CLOSES OFF TO OUR S. THIS WILL CAUSE THE FORMATION OF SFC LOW ALONG THE FRONT S OF NEW ENGLAND. THIS LOW WILL TRACK SLOWLY TO THE N...ALONG THE STALLED FRONT...TONIGHT AND SATURDAY....WITH ANOTHER ROUND OF STEADY RAIN EXPECTED LATE TONIGHT INTO AT LEAST SAT MORNING. SAT WILL BE COOL AS THE LOW PULLS IN AIR FROM THE N...WITH HIGHS ONLY IN THE UPPER 40S TO MID 50S. WILL ALSO HAVE TO WATCH FOR NE FLOW LOW LEVEL JET TO FIRE UP LATE TONIGHT INTO SAT...WHICH GOULD PRODUCE SOME GUSTY ALONG THE COAST...ALTHOUGH THIS TYPE OF EVENT WILL HAVE MORE IMPLICATIONS FOR MARINE INTERESTS.
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&& .LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
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MODELS ARE MOSTLY IN AGREEMENT CONCERNING OUR WEATHER FOR THE HOLIDAY WEEKEND. CUTOFF LOW REMAINS NEARLY STATIONARY THROUGH SUNDAY BEFORE LIFTING NE SUNDAY NIGHT. WITH DEEP MOISTURE STREAMING NORTH INTO THE SYSTEM HEAVY RAIN FROM TIE TO TIME CAN BE EXPECTED THROUGH SUNDAY. THE HEAVIEST RAIN SATURDAY NIGHT AND SUNDAY IS LIKELY TO FALL IN THE INTERIOR AS BOT THE GFS AND ECMWF INDICATE A DRY SLOT MOVING INTO COASTAL REGIONS. HIGH PRESSURE FINALLY BUILDS IN MONDAY AND TUESDAY. A WARM FRONT APPROACHES WEDNESDAY. GFS SHOWS +16 AT 850 THURSDAY AND +18 BY FRIDAY.
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&& .AVIATION /07Z FRIDAY THROUGH TUESDAY/...
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SHORT TERM... COASTAL TERMINALS AND KAUG CAN EXPECT EXTENDED PERIOD OF IFR...OR LOWER AT TIMES...RIGHT THROUGH TONIGHT AND PROBABLY INTO SATURDAY AS WELL. KCON/KLEB/KHIE COULD SEE A PERIOD OF MVFR /ESEPCIALLY KHIE/ TODAY...BUT IT IS LIKELY THESE TERMINALS WILL FALL BACK TO IFR AGAIN TONIGHT INTO SAT. LONG TERM /SATURDAY THROUGH TUESDAY/...IFR/LIFR SATURDAY THRU MUCH OF SUNDAY...VFR MONDAY AND TUESDAY.
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&& .MARINE...
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SHORT TERM...SCA REMAINS IN PLACE THROUGH 12Z SATURDAY...AND WILL PROB NEED TO EB EXTENDED INTO SAT AND EVEN SAT NIGHT. WINDS DIMINISHING A LITTLE BIT TODAY...AND WILL SEE A BREAK FROM THE SCA WINDS...BUT SEAS WILL REMAIN 5-7 FT IN GENERAL. WATCHING THE POSSIBILITY OF A STRONG NE FLOW DEVELOPING RIGHT ALONG THE COAST LATE TONIGHT INTO SAT MORNING. IT WILL LKLY PRODUCE SCA WINDS...WITH AN SMALL CHANCE THAT A SHORT PERIOD OF GALES MAY BE POSSIBLE. LONG TERM /SATURDAY THROUGH TUESDAY/...EXPECT WINDS AND SEAS TO REMAIN AT SCA LEVELS THROUGH SUNDAY THEN DROP BELOW SCA CRITERIA BY MONDAY.
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&& .FIRE WEATHER...
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VERY WET CONDITIONS CONTINUE THROUGH THE WEEKEND.
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&& .HYDROLOGY...
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WILL BE WATCHING RIVERS AND STREAMS THE NEXT 3 DAYS. WE HAVE SEEN SOME SHARP RISES ON RIVERS AND STREAMS IN NORTHERN NH WHERE 1.5 TO 2 INCHES FELL EARLIER TODAY. THE CONNECTICUT AT NORTH STRATFORD IS CRESTING ABOUT NOW BUT WILL RISE AGAIN LATER TODAY AS ADDITIONAL HEAVY RAIN IS EXPECTED. FARTHER SOUTH IN SE NH AND SW MAINE THERE IS A BAND OF HEAVY RAIN THAT IS SLOWLY LIFTING NORTH. AUTOMATED RAIN GAUGES IN THE AREA ARE SHOWING ABOUT ONE THIRD TO ONE HALF AN INCH PER HOUR WITH THIS BAND. THE SITUATION WILL CONTINUE TO BE MONITORED THROUGH THE DAY.
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&& .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...SMALL CRAFT ADVISORY UNTIL 8 AM EDT SATURDAY FOR ANZ150>154. && $$ SYNOPSIS... NEAR TERM...CEMPA SHORT TERM...CEMPA LONG TERM...HAWLEY AVIATION...CEMPA/HAWLEY MARINE...CEMPA/HAWLEY FIRE WEATHER...CEMPA HYDROLOGY...HAWLEY

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