Area Forecast Discussion
Issued by NWS Portland, ME

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FXUS61 KGYX 060130 AAB
AFDGYX

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE GRAY ME
830 PM EST THU MAR 5 2015

.SYNOPSIS...
HIGH PRESSURE WILL BUILD SOUTH OF NEW ENGLAND TONIGHT THROUGH
FRIDAY. A COLD FRONT WILL APPROACH FROM THE NORTHWEST ON SATURDAY
AND WILL CROSS THE AREA SATURDAY NIGHT. WEAK HIGH PRESSURE WILL
BUILD IN FROM THE NORTHWEST SUNDAY. A WEAK COLD FRONT WILL CROSS
THE REGION ON MONDAY. A WARM FRONT WILL CROSS THE REGION ON
TUESDAY. HIGH PRESSURE WILL BUILD SOUTH OF NEW ENGLAND ON
WEDNESDAY.

&&

.NEAR TERM /THROUGH FRIDAY/...
UPDATE...CLEARING HAS MOVED INTO ALL BUT THE COAST AND SRN NH AT
THIS HOUR. TEMPS ACROSS THE NRN VALLEYS ARE APPROACHING...IF
NOT ALREADY BELOW ZERO. HAVE TWEAKED HOURLY TEMPS THRU MIDNIGHT TO
ACCOUNT FOR LATEST OBSERVATIONAL TRENDS.

PREVIOUS DISCUSSION...SURFACE HIGH PRESSURE CONTINUES TO BUILD IN
ACROSS THE AREA ALONG WITH COLD AIR ADVECTION...WHICH HAS BEEN
DROPPING OUR TEMPERATURES THROUGHOUT THE DAY. MID TO UPPER LEVEL
CLOUDS WILL CONTINUE TO PUSH SOUTH THIS EVENING AND MOST AREAS
SHOULD BECOME FAIRLY CLEAR BY MIDNIGHT WITH THE EXCEPTION OF MAYBE
SOUTHERN CHESHIRE AND HILLSBOROUGH COUNTIES IN NEW HAMPSHIRE. THE
NORTHERN CWA SHOULD BE ABLE TO RADIATE MOST EFFICIENTLY TONIGHT AS
CLOUDS MOVE OUT OF THERE FIRST AND THE BOUNDARY LAYER DECOUPLES
WITH USUAL COLD SPOTS ACROSS DROPPING POSSIBLY BETWEEN 15 AND 20
BELOW ZERO.

&&

.SHORT TERM /FRIDAY NIGHT/...
HIGH PRESSURE REMAINS OVERHEAD TOMORROW...AND ALTHOUGH WE WILL
START OFF QUITE COLD...THE STRONG MARCH SUNSHINE SHOULD CREATE
QUITE A LARGE DIURNAL SWING AS TEMPERATURES COULD CLIMB 25-30
DEGREES IN SOME SPOTS DURING THE DAYTIME HOURS. A WEAK WAVE WILL
APPROACH FRIDAY NIGHT INTO SATURDAY MORNING AND THIS WILL INCREASE
CLOUDS TOMORROW NIGHT AND BRING A SLIGHT CHANCE OF A SNOW SHOWER
IN THE MOUNTAINS BY SATURDAY MORNING.

&&

.LONG TERM /SATURDAY THROUGH THURSDAY/...
HIGH PRESSURE WILL BUILD SOUTH OF NEW ENGLAND ON
SATURDAY AS A WEAK COLD FRONT APPROACHES FROM THE
NORTHWEST. THE DAY WILL FEATURE VARIABLE CLOUDS
WITH A STRAY SNOW SHOWER POSSIBLE IN NORTHERN SECTIONS.
HIGHS WILL RANGE FROM THE MID 20S NORTH TO THE LOWER
30S SOUTH.

COLD FRONT WILL CROSS THE REGION SATURDAY NIGHT.
MOSTLY CLOUDY SKIES AND SCATTERED SNOW SHOWERS WILL
GIVE WAY TO PARTIAL CLEARING AFTER MIDNIGHT DOWNWIND
OF THE MOUNTAINS. ELSEWHERE SKIES WILL REMAIN MOSTLY
CLOUDY WITH A SLIGHT CHANCE OF SNOW SHOWERS IN THE
NORTH. LOWS WILL ONCE AGAIN FALL TO BELOW NORMAL
LEVELS WITH READINGS BY EARLY SATURDAY OF 5 TO 15
NORTH AND IN THE TEENS SOUTH.

WEAK HIGH PRESSURE BUILDS IN FROM THE NORTHWEST ON SUNDAY.
LINGERING FRONTAL TROUGH WILL KEEP VARIABLE CLOUDINESS ACROSS
THE REGION FOR MOST OF THE DAY. HIGH TEMPS WILL RANGE FROM
THE MID 20S TO MID 30S.

WEAK LOW PRESSURE CROSSING SOUTHERN CANADA SUNDAY NIGHT WILL
DRIVE A COLD FRONT THROUGH THE REGION MONDAY BRINGING JUST A
GLANCING BLOW OF COOLER AIR MAINLY INTO NORTHERN ZONES. EXPECT
MOSTLY CLOUDY SKIES WITH JUST A CHANCE OF A SNOW SHOWER. HIGH
WILL RANGE THROUGH THE 30S.

SHALLOW RIDGE BUILDING IN FROM THE WEST WILL BRING CLEARING SKIES
MONDAY EVENING ALTHOUGH LOW LEVEL MOISTURE WILL KEEP CLOUDS IN
THE NORTH. OVERNIGHT LOWS WILL RANGE THROUGH THE TEENS TO NEAR 20.

HIGH PRESSURE SHIFTS OFFSHORE ON TUESDAY AND RETURN FLOW WILL BRING
WARMER AIR BACK INTO THE AREA. EXPECT MOSTLY CLOUDY SKIES IN
NORTHERN SECTIONS CLOSER TO THE WARM FRONT. WILL LIKELY ALSO
INCLUDE SOME LOW CHANCE POPS FOR SNOW SHOWERS BUT MOST OF THIS
ACTIVITY SHOULD REMAIN NORTH OF THE BORDER. HIGH TEMPS WILL
FINALLY TOP OUT NEAR NORMAL WITH MID 30S NORTH TO LOWER 40S SOUTH.

WARMER WEATHER WILL CONTINUE ON WEDNESDAY AS ANOTHER AREA OF HIGH
PRESSURE BUILDS SOUTH OF NEW ENGLAND. EXPECT MOSTLY CLOUDY SKIES
TO PERSIST IN THE NORTH WITH A CHANCE OF A RAIN OR SNOW SHOWER IN
THE AFTERNOON AS ANOTHER WARM FRONT PUSHES THROUGH SOUTHERN
CANADA. PARTLY TO MOSTLY SUNNY SKIES WILL PREVAIL IN THE SOUTH.
HIGHS WILL REACH THE LOWER TO MID 40S IN MOST LOCATIONS.

COLD FRONT WILL APPROACH FROM THE NORTHWEST WEDNESDAY NIGHT AND
WILL PUSH THROUGH THE REGION ON THURSDAY. SHOULD SEE ONE MORE WARM
DAY AS COLD AIR LAGS BEHIND THE FRONT. LOOKING FOR LITTLE IF ANY
SHOWER ACTIVITY WITH THE FROPA. HIGHS WILL TOP OUT NEAR 40 BEFORE
DROPPING BACK LATER IN THE AFTERNOON.

&&

.AVIATION /02Z FRIDAY THROUGH TUESDAY/...
SHORT TERM...VFR CONDITIONS ARE EXPECTED OVER THE ENTIRE PERIOD
WITH HIGH PRESSURE OVERHEAD.

LONG TERM...VFR SATURDAY. AREAS MVFR CEILINGS/VSBY SATURDAY NIGHT
AND SUNDAY. VFR MONDAY AND TUESDAY.

&&

.MARINE...
SHORT TERM...SCAS WILL CONTINUE WITH SOME GUSTY WINDS BEHIND COLD
FRONT. COLD AIR ALONG WITH THE GUSTY WINDS WILL MAKE IT FAVORABLE
FOR FREEZING SPRAY ACROSS ALL AREAS TONIGHT THROUGH TOMORROW
MORNING.

LONG TERM...SCA`S MAY BE NEEDED LATE MONDAY.

&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...NONE.
NH...NONE.
MARINE...FREEZING SPRAY ADVISORY UNTIL 7 AM EST FRIDAY FOR ANZ150>154.
     SMALL CRAFT ADVISORY UNTIL 7 AM EST FRIDAY FOR ANZ150-152-154.

&&

$$

NEAR TERM...LEGRO



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