Area Forecast Discussion
Issued by NWS Portland, ME

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000 FXUS61 KGYX 031335 AFDGYX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GRAY ME 935 AM EDT THU SEP 3 2015 .SYNOPSIS... A COLD FRONT WILL DROP SOUTH THROUGH THE REGION TODAY AND WILL PUSH OFFSHORE THIS EVENING. HIGH PRESSURE WILL BUILD SOUTH FROM CANADA FRIDAY THROUGH SATURDAY. HIGH PRESSURE WILL SHIFT OFFSHORE SATURDAY NIGHT AND WILL REMAIN ANCHORED OFF THE COAST INTO MIDWEEK AND ALLOW FOR JULY-LIKE WEATHER SUNDAY INTO WEDNESDAY. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... 930 AM UPDATE: A FEW LIGHT SHOWERS MOVING THROUGH NORTHERN NH AT THIS TIME OTHERWISE ONLY SOME CLOUDS ASSOCIATED WITH A COLD FRONT THAT IS DROPPING SOUTH ACROSS THE REGION. WITH SOME DIURNAL HEATING LAPSE RATES SHOULD SUFFICE IN DEVELOPING SCATTERED SHOWERS AND EVEN AN ISOLATED TSTORM OR TWO DURING THE AFTERNOON. SO WITH THIS THINKING FEELING IS TO LEAVE THE POPS IN PLACE AS PER PREVIOUS FORECAST. ONLY MINOR TWEAKS THAT WERE MADE WAS THE CLOUD GRIDS TO INDICATE A LITTLE MORE SUN FOR THE REST OF THE MORNING OVER SOUTHERN AREAS AND ALSO ADJUSMTENTS TO TEMPERATURE GRIDS ACCOUNTING FOR A SLOWER WARMING THIS MORNING OVER NORTHERN/CENTRAL AREAS OF FA WHERE THERE WERE CLOUDS. PREVIOUS DISCUSSION: WEAK COLD FRONT DROPPING SOUTH FROM CANADA PRODUCING SOME ISOLATED CONVECTION EARLY THIS MORNING ACROSS NORTHERN NEW YORK BUT THIS ACTIVITY QUICKLY DIMINISHING AS IT HEADS INTO NORTHERN ZONES. THIS BOUNDARY WILL CONTINUE TO SAG SOUTH THROUGH THE MORNING HOURS PRODUCING A FEW SHOWERS AND EXPECT CONVECTION TO REDEVELOP ACROSS CENTRAL AND SOUTH PORTIONS OF NEW HAMPSHIRE AND SOUTHWEST MAINE AS HEATING PICKS UP LATER TODAY. SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE INTO THE EARLY EVENING IN SOUTHERN ZONES BEFORE DIMINISHING WITH LOSS OF HEATING. HIGH TEMPS WILL RANGE FROM THE UPPER 70S NORTH TO THE UPPER 80S SOUTH. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM FRIDAY/... EXPECT CLOUDS TO PERSIST ACROSS SOUTHWEST ZONES THROUGH MUCH OF THE NIGHT ALONG WITH A FEW WIDELY SCATTERED SHOWERS BEFORE MIDNIGHT. REMAINDER OF THE FORECAST AREA SHOULD SEE CLEARING SKIES AS HIGH PRESSURE BUILDS IN FROM THE NORTH. LOWS WILL RANGE FROM THE UPPER 40S TO MID 50S NORTH AND UPPER 50S TO MID 60S SOUTH. SKIES WILL GRADUALLY CLEAR ACROSS SOUTHERN NEW HAMPSHIRE ON FRIDAY AS HIGH PRESSURE CONTINUES TO BUILD IN FROM THE NORTH. WILL SEE A MUCH COOLER AND LESS HUMID DAY WITH HIGHS RANGING THROUGH THE 70S. && .LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/... HIGH PRESSURE WILL BE CENTERED OVERHEAD FRIDAY NIGHT. CLEAR AND CALM CONDITIONS ARE EXPECTED. THIS SHOULD LEAD TO PLENTY OF LOCALLY DENSE VALLEY FOG. THE HIGH MOVES OFF TO THE SOUTH DURING THE DAY ON SATURDAY ALLOWING FOR THE START OF ANOTHER WARMING TREND. WEST TO SOUTHWEST FLOW AROUND THE HIGH WILL PERSIST THROUGH AT LEAST TUESDAY AND LIKELY ALLOW FOR TEMPERATURES WELL ABOVE NORMAL SUNDAY THROUGH TUESDAY. HIGHS IN THE LOWER 90S WILL BE POSSIBLE IN SPOTS MONDAY AND TUESDAY. THIS HEAT MAY VERY WELL LAST INTO WEDNESDAY BEFORE A COLD FRONT POSSIBLY MOVES IN AND COOLS US OFF. CHANCES FOR PRECIPITATION SATURDAY THROUGH WEDNESDAY LOOK VERY LOW...WITH PERHAPS A FEW SHOWERS AND THUNDERSTORMS POSSIBLE ACROSS THE MOUNTAINS BY TUESDAY OR WEDNESDAY. && .AVIATION /14Z THURSDAY THROUGH MONDAY/... SHORT TERM...AREAS OF IFR/LIFR CIGS/VSBY IN MORNING VALLEY FOG...OTHERWISE VFR. LONG TERM...LOCALLY DENSE LATE NIGHT/EARLY MORNING VALLEY FOG LIKELY FRIDAY NIGHT THROUGH EARLY NEXT WEEK. OTHERWISE...MAINLY VFR WITH HIGH PRESSURE IN CONTROL. && .MARINE... SHORT TERM...BRIEF PERIOD OF NORTHEASTERLY SCA WINDS MAY DEVELOP OVERNIGHT TONIGHT BEFORE DROPPING OFF FRIDAY MORNING. THIS MAY ALLOW SEAS TO BUILD CLOSE TO 5 FT...ESPECIALLY ACROSS SOUTHERN MARINE ZONES. LONG TERM...HIGH PRESSURE WILL BE IN CONTROL FRIDAY NIGHT THROUGH EARLY NEXT WEEK ALLOWING FOR SUB-SCA CONDITIONS. && .GYX WATCHES/WARNINGS/ADVISORIES... ME...NONE. NH...NONE. MARINE...NONE. && $$

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