Area Forecast Discussion
Issued by NWS Portland, ME

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FXUS61 KGYX 030132
AFDGYX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE GRAY ME
932 PM EDT THU JUL 2 2015

.SYNOPSIS...
HIGH PRESSURE BUILDS ACROSS THE REGION TONIGHT AND REMAINS IN
PLACE THROUGH SATURDAY NIGHT...PROVIDING DRY AND MAINLY CLEAR WEATHER
RIGHT THROUGH THE FOURTH OF JULY. A WEAK TROUGH OF LOW PRESSURE
MOVES TO OUR NORTH ON SUNDAY. HIGH PRESSURE THEN BUILDS IN THROUGH
MIDWEEK.

&&

.NEAR TERM /UNTIL 6 AM FRIDAY MORNING/...
930 PM UPDATE...VERY LITTLE CHANGE TO THE FORECAST AS IT REMAINS
ON TRACK. EXPECT THE PLEASANT EVENING TO CONTINUE.

645 PM UDPATE...LITTLE CHANGE TO THE GOING FORECAST. SOME HIGH
CLOUDS OVER SOUTHERNMOST ZONES ASSOCIATED WITH A LOW PRESSURE WAVE
PASSING WELL TO OUR SOUTH WILL GRADUALLY MOVE AWAY THIS EVENING.
DIMINISHING WINDS...MOSTLY CLEAR SKIES...AND COOLING TEMPS ARE
EXPECTED FOR THE REMAINDER OF THE EVENING.

PREVIOUSLY...

SFC HIGH BUILDS IN SLOWLY FROM THE WEST OVERNIGHT...ALTHOUGH WEAK
500 MB TROUGH SWINGS THRU WHICH WILL KEEP A BIT OF GRADIENT FLOW
GOING ABV THE BOUNDARY LYR...AND PERHAPS MOVE SOME SCT CIRRUS
THRU OVERNIGHT. THE SHELTERED SPOTS SHOULD DECOUPLE...AND SOME
VLY FOG IS EXPECTED...ALTHOUGH WITH SOME FLOW AT THE TOP OF THE
PBL...WILL BE MORE PATCHY. IT WILL BE CHILLY WITH MINS RANGING
FROM THE MID TO UPPER 50S ON THE COAST...TO THE MID 40S IN THE N.

&&

.SHORT TERM /6 AM FRIDAY MORNING THROUGH FRIDAY NIGHT/...
WILL SEE THE 500 MB RIDGING BEGIN TO SHIFT IN ON FRIDAY AND THIS
WILL ALLOW SFC RIDGE TO BUILD AND WEAKEN GRADIENT FLOW
SIGNIFICANTLY. INLAND TEMPS SHOULD BE SIMILAR TO THU...MAY A TOUCH
WARMER. ON THE COAST WILL SEE A LIGHT SEA BREEZE DEVELOP...WHICH
WILL KEEP MAXES MAYBE A DEGREE OR TWO COOLER THAN THU....INLAND
HIGHS RANGE FROM THE LOW TO MID 70S IN THE MTNS...TO AROUND 80 IN
INTERIOR SRN NH AND SW ME.

FRIDAY NIGHT LOOKS COOL AND CLEAR...AND JUST A TOUCH WARMER THAN
TONIGHT...WITH LOWS AGAIN RANGING FROM THE MID TO UPPER 40S
N...TO THE MID TO UPPER 50S ON THE COAST.

&&

.LONG TERM /SATURDAY THROUGH THURSDAY/...
A RATHER TRANQUIL PATTERN SETTING UP FOR THE OUTLOOK PERIOD
ACCOMPANIED BY SUMMER CONDITIONS AND NEAR OR ABOVE NORMAL
TEMPERATURES...FINALLY! WE ARE ALSO STAYING IN THE NORTHERN
STREAM AND MAINLY BE AFFECTED BY CANADIAN AIR MASSES, SO HUMIDITY
LEVELS SHOULD REMAIN AT COMFORTABLE LEVELS.

ALTHOUGH THE UPPER AIR PATTERN CONTINUES THE TROUGH IN THE
EAST...ALL THE ENERGY AND PRECIPITATION WILL BE STAYING WELL TO
OUR SOUTH WITH ONLY VERY MINOR TROUGHS TO QUIETLY MOVE THROUGH
EVERY FEW DAYS BUT MOSTLY TO GO UNNOTICED. FORECAST H85
TEMPERATURES ARE MILD AND OTHER THAN SOME AFTERNOON SEABREEZES NO
CONSIDERABLE ONSHORE FLOW EXPECTED, THUS THE ABOVE NORMAL
TEMPERATURES.

THE ONLY TROUGH WORTH MENTIONING IS THE ONE FORECAST TO MOVE
THROUGH ON SUNDAY THAT MAY CAUSE SOME SCATTERED SHOWERS BUT WILL
BE QUICKLY FOLLOWED BY MORE HIGH PRESSURE AND DRY SUMMER
CONDITIONS AGAIN EARLY NEXT WEEK.

&&

.AVIATION /02Z FRIDAY THROUGH TUESDAY/...
SHORT TERM...MAINLY VFR THRU FRI NIGHT. ONLY EXCEPTION WILL BE A
PERIOD OF VLY FOG TOWARD DAYBREAK AT KHIE/KLEB.

LONG TERM...POSSIBLE MVFR CEILINGS SUNDAY NIGHT IN SCATTERED SHOWERS
AS A WEAK TROUGH MOVES ACROSS THE REGION.

&&

.MARINE...
SHORT TERM...SFC HIGH BUILDS JUST N OF THE WATERS THROUGH FRI
NIGHT...WITH GENERALLY LIGHT WINDS AND SEAS IN THE 1-3 FT RANGE
AFTER A FEW 4-5 FOOTERS SUBSIDE TONIGHT. EXPECT SOME ENHANCED
ONSHORE FLOW IN SEA BREEZE CIRCULATIONS FRI AFTERNOON ALONG THE
SHORE.

LONG TERM...NO FLAGS FOR THE OUTLOOK PERIOD AS GENERALLY HIGH
PRESSURE AND LIGHT WINDS DOMINATE FOR THE OUTLOOK PERIOD.

&&

.GYX WATCHES/WARNINGS/ADVISORIES...
ME...NONE.
NH...NONE.
MARINE...NONE.

&&

$$

NEAR TERM...MLE



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