Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 011223 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 823 AM EDT TUE SEP 1 2015 .SYNOPSIS... WHILE THE REGION WILL SEE A COUPLE FRONTAL PASSAGES...HIGH PRESSURE WILL GENERALLY REMAIN IN CONTROL OF THE WEATHER ACROSS THE REGION THROUGH MOST OF THIS WEEK...WITH AN EXTENDED PERIOD OF QUIET WEATHER EXPECTED. TEMPERATURES WILL BE ABOVE NORMAL THROUGH THE PERIOD...WITH GRADUALLY INCREASING HUMIDITY. A COLD FRONT COULD COOL US DOWN BRIEFLY LATE WEEK. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... UPDATE...A FEW TWEAKS TO TEMPS AND SKY COVER TO ACCOUNT FOR LATEST OBSERVATIONAL TRENDS. OTHERWISE NO MAJOR CHANGES TO THE FORECAST. PREV DISC... ONGOING COLD AIR ADVECTION AND WINDS BECOME ONSHORE TODAY WILL ALLOW FOR MUCH COOLER TEMPERATURES THAN YESTERDAY. THIS WILL KEEP HIGH TEMPERATURES FROM CLIMBING OUT OF THE 70S ALONG THE COAST AND OVER EASTERN SECTIONS NEAR THE PENOBSCOT RIVER VALLEY. ELSEWHERE...READINGS WILL MAKE IT INTO THE 80S WITH MID 80S OVER SOUTHERN NEW HAMPSHIRE. WARM AIR ADVECTION WILL ENSUE THIS AFTERNOON...WITH MOST LIKELY SOME HIGH THIN CLOUDINESS DEVELOPING AND POSSIBLY SOME MID LEVEL MOISTURE AT TIMES. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM WEDNESDAY/... PATCHY INLAND FOG DEVELOPING AGAIN...ESPECIALLY IN SHELTERED VALLEY LOCATIONS SUCH AS THE CT RIVER VALLEY IN NEW HAMPSHIRE. ON WEDNESDAY...THE HEAT RETURNS...AND ALSO INCREASING DEW POINTS. THIS WILL MAKE FOR A VERY WARM SEPTEMBER DAY...ALBEIT NOT RECORD BREAKING. MOST AREAS WILL TOP OUT BETWEEN 85 AND 90 DEGREES...WITH LOWER 90S OVER SOUTHERN NEW HAMPSHIRE. COOLEST READINGS WILL BE RIGHT ALONG THE COAST AS WINDS BECOME SOUTH OFF THE GULF OF MAINE AT TIMES DURING THE DAY. && .LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/... COLD FRONT WILL CONTINUE TO SLOWLY SAG SOUTH THROUGH THE REGION WEDNESDAY NIGHT. MAY SEE SOME LINGERING SHOWERS OR ISOLATED THUNDERSTORMS IN NORTHERN ZONES DURING THE EVENING HOURS BUT WITH LITTLE FORCING ALONG THIS WEAK BOUNDARY EXPECT THIS ACTIVITY TO DIE OUT QUICKLY WITH LOSS OF HEATING. WILL BE ANOTHER MUGGY NIGHT WITH LOWS RANGING THROUGH THE 60S. COLD FRONT WILL END UP DRAPED ACROSS SOUTHERN ZONES BY THURSDAY MORNING AND WILL LIKELY BE THE FOCUS FOR EARLY AFTERNOON CONVECTION. SHEAR WILL BE MINIMAL AT BEST AND WITH PWAT`S FORECAST NEAR 1.5 INCHES SLOW MOVING CELLS MAY DROP SOME CONSIDERABLE RAINFALL AMOUNTS IN A SHORT TIME. EXPECT THIS ACTIVITY TO SHIFT SOUTH DURING THE AFTERNOON AS THE BOUNDARY SHIFTS OFFSHORE. HIGH TEMPS WILL ONCE AGAIN RANGE THROUGH THE 80S IN MOST AREAS. HIGH PRESSURE BUILDING SOUTH FROM CANADA WILL BRING COOLER AND LESS HUMID AIR INTO THE REGION BEHIND THE FRONT THURSDAY NIGHT. LOWS WILL RANGE FROM THE 50S NORTH TO NEAR 60 SOUTH. FRIDAY LOOKING LIKE A GEM AS HIGH PRESSURE CONTINUES TO BUILD OVER THE AREA. TEMPS RANGING THROUGH THE 70S AND DEW POINTS IN THE LOWER TO MID 50S WILL MAKE FOR A VERY COMFORTABLE DAY. HIGH PRESSURE WILL CONTINUE TO SETTLE SOUTH THROUGH THE REGION FRIDAY NIGHT...PUSHING SOUTH OF THE FORECAST AREA BY SATURDAY MORNING. RETURN FLOW WILL BRINGING WARMER AND MORE HUMID AIR BACK INTO THE REGION FOR THE WEEKEND. EXPECT PLENTY OF SUN THROUGH BOTH DAYS WITH GRADUALLY INCREASING DAYTIME HIGHS...REACHING THE MID TO UPPER 80S BY SUNDAY. HEAT AND HUMIDITY WILL PERSIST INTO EARLY NEXT WEEK AS A MASSIVE UPPER RIDGE HANGS ON OVER THE NORTHEAST. && .AVIATION /13Z TUESDAY THROUGH SATURDAY/... SHORT TERM...MAINLY VFR CONDITIONS...WITH THE EXCEPTION OF LATE NIGHT INLAND VALLEY FOG. THIS WILL ALLOW FOR LIFR CONDITIONS TONIGHT...ESPECIALLY AT KLEB. LONG TERM...VFR WEDNESDAY NIGHT THROUGH SATURDAY. && .MARINE... SHORT TERM...WINDS AND SEAS WILL REMAIN BELOW SMALL CRAFT ADVISORY CRITERIA. MARINE FOG SHOULD BE LIMITED DUE TO A PERSISTENT WEST AND SOUTHWEST GRADIENT. LONG TERM...NO PROBLEMS NOTED. && .CLIMATE... WHILE TEMPERATURES WILL SOAR INTO THE MID 80S ALONG THE COAST TO THE LOWER 90S INLAND ON WEDNESDAY...THIS WILL LIKELY NOT SET RECORDS FOR SEPT 2ND. THE RECORD HIGH IN CONCORD ON WEDNESDAY IS 98 DEGREES...WHILE IT IS 94 DEGREE IN PORTLAND. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...NONE. && $$ NEAR TERM...LEGRO

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