Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 201824 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 224 PM EDT WED MAY 20 2015 .SYNOPSIS...
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HIGH PRESSURE WILL GRADUALLY BUILD IN THROUGH TONIGHT. LOW PRESSURE WILL PASS WELL TO OUR SOUTH THURSDAY NIGHT INTO FRIDAY...WITH ANOTHER COLD FRONT SWINGING ACROSS THE REGION DURING THE DAY ON FRIDAY. HIGH PRESSURE THEN BUILDS IN OVER THE WEEKEND. ANOTHER COLD FRONT LOOKS TO CROSS THE AREA TO END THE HOLIDAY WEEKEND.
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&& .NEAR TERM /THROUGH TONIGHT/...
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CLOUDS SHOULD LARGELY MELT AWAY THIS EVENING WITH THE LOSS OF DAYTIME HEATING. CLEARING SKIES...DIMINISHING SURFACE WINDS AND DRY AIR ASSOCIATED WITH SURFACE HIGH NOSING INTO THE FORECAST AREA WILL PRODUCE CHILLY OVERNIGHT READINGS. THE CURRENT FREEZE WATCH WAS CONVERTED TO A WARNING...WHILE MANY OTHER AREAS WILL SEE FROST WITH A FROST ADVISORY ISSUED.
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&& .SHORT TERM /THURSDAY THROUGH THURSDAY NIGHT/...
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PARTLY SUNNY FOR THURSDAY WITH LIGHT WINDS AS WE`RE SANDWICHED BETWEEN A FRONT DROPPING SOUTH INTO THE ROOFTOP OF MAINE AND SOUTHERN QUEBEC...AND LOW PRESSURE SLIDING OFFSHORE OF THE CAROLINA COAST. SHOULD BE A FEW DEGREES WARMER THEN TODAY WITH HIGHS IN THE 60S AND LOWER 70S. FOR THURSDAY NIGHT...WE REMAIN SANDWICHED BETWEEN THE TWO WEATHER SYSTEMS WITH SKIES AVERAGING PARTLY CLOUDY ACROSS THE AREA. THE FRONTAL SYSTEM DRAPED ACROSS SOUTHERN QUEBEC COULD PRODUCE A STRAY SHOWER VICINITY OF THE INTERNATIONAL BORDER IN MAINE...OTHERWISE REMAINING DRY OVERNIGHT.
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&& .LONG TERM /FRIDAY THROUGH TUESDAY/...
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12Z MODEL SUITE CONTINUES TO SHOW AN UPPER LEVEL LOW PRESSURE SYSTEM ALOFT FOR THE TAIL END OF THE WORK WEEK CROSSING THE AREA. AT THE SAME TIME...LOW PRESSURE WILL DEVELOP WELL OFF THE NORTHEASTERN SEABOARD. THIS WILL BRING SCATTERED SHOWERS TO THE REGION ON FRIDAY. IT WILL BE WINDY AND CHILLY ON SATURDAY...WITH THE MOST CLOUDINESS AND A CHANCE OF A SPRINKLE OR SHOWER IN THE NORTHERN MOUNTAINS. A WARM FRONT WILL BEGIN TO APPROACH THE REGION FROM THE MID ATLANTIC REGION ON MEMORIAL DAY. THERE WILL BE AN INCREASE IN MOISTURE WITH THIS FRONT ALONG WITH A CHANCE OF SHOWERS AND THUNDERSTORMS MONDAY INTO TUESDAY. DRIER AIR RETURNS FROM A WESTERLY FLOW BY THE MIDDLE OF NEXT WEEK.
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&& .AVIATION /18Z WEDNESDAY THROUGH MONDAY/...
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SHORT TERM...GUSTY NORTHWEST SURFACE WINDS WILL BECOME LIGHT BY DUSK. VFR CONDS EXPECTED. LONG TERM...VERY BREEZY CONDITIONS WITH COLD AIR ADVECTION ON FRIDAY. SOME PATCHY MVFR CONDITIONS NORTHERN AND EASTERN SECTIONS. CIGS LOWERING AGAIN MONDAY INTO TUESDAY WITH A WARM FRONT SETTING UP TO OUR SOUTH.
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&& .MARINE...
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SHORT TERM...GUSTY WINDS AND SEAS DIMINISH THIS EVENING AND CURRENT SMALL CRAFT WILL BE ALLOWED TO EXPIRE AT THAT TIME. LONG TERM...SCA CONDITIONS WITH CONDITIONS POSSIBLY APPROACHING A LOW END GALE WITH GUSTS SATURDAY. AREAS OF FOG NEXT WEEK WITH LOWERING VISIBILITIES OVER THE COASTAL WATERS.
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&& .FIRE WEATHER...
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GOOD RELATIVE HUMIDITY RECOVERY IS EXPECTED TONIGHT AND THURSDAY NIGHT. MINIMUM RELATIVE HUMIDITY VALUES TOMORROW WILL RANGE FROM 20 TO 30 PERCENT BUT WINDS ARE EXPECTED TO BE LIGHT. A FEW SHOWERS ARE EXPECTED FRIDAY...BUT RAINFALL AMOUNTS WILL BE LESS THAN ONE-TENTH ON AN INCH.
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&& .GYX WATCHES/WARNINGS/ADVISORIES...
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ME...FREEZE WARNING FROM 2 AM TO 8 AM EDT THURSDAY FOR MEZ007>009- 012>014. FROST ADVISORY FROM 2 AM TO 8 AM EDT THURSDAY FOR MEZ018>022- 025>028. NH...FREEZE WARNING FROM 2 AM TO 8 AM EDT THURSDAY FOR NHZ001>007. FROST ADVISORY FROM 2 AM TO 8 AM EDT THURSDAY FOR NHZ008>011- 015. MARINE...SMALL CRAFT ADVISORY UNTIL 7 PM EDT THIS EVENING FOR ANZ150>154.
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&& $$

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